FLYW

SEC source: 0000899243-21-021116 · doc4.xml · nonDerivative · entry 19

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 1,036,509

F6 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of the Issuer's Class A Common Stock was automatically reclassified into one share of Voting Common Stock following the Conversion, and immediately prior to the closing of the Issuer's initial public offering.

F6 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of the Issuer's Class A Common Stock was automatically reclassified into one share of Voting Common Stock following the Conversion, and immediately prior to the closing of the Issuer's initial public offering.

F4 · ownership.nature: These shares are held of record by Spark Capital Growth Fund, L.P. ("Spark Capital Growth"). SGMP is the general partner of Spark Capital Growth. The Managing Members are the managing members of SGMP. Each of the Managing Members may be deemed to share investment, voting and dispositive power over these shares. Each of SGMP and the Managing Members disclaim beneficial ownership of these shares and this report shall not be deemed an admission that any one of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.

SEC source: 0000899243-21-021116 · doc4.xml · nonDerivative · entry 18

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 10,257

F6 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of the Issuer's Class A Common Stock was automatically reclassified into one share of Voting Common Stock following the Conversion, and immediately prior to the closing of the Issuer's initial public offering.

F6 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of the Issuer's Class A Common Stock was automatically reclassified into one share of Voting Common Stock following the Conversion, and immediately prior to the closing of the Issuer's initial public offering.

F3 · ownership.nature: These shares are held of record by Spark Capital Growth Founders' Fund, L.P. ("Spark Capital Growth FF"). Spark Growth Management Partners, LLC ("SGMP") is the general partner of Spark Capital Growth FF. The Managing Members are the managing members of SGMP. Each of the Managing Members may be deemed to share investment, voting and dispositive power over these shares. Each of SGMP and the Managing Members disclaim beneficial ownership of these shares and this report shall not be deemed an admission that any one of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.

SEC source: 0000899243-21-021116 · doc4.xml · nonDerivative · entry 17

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 97,473

F6 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of the Issuer's Class A Common Stock was automatically reclassified into one share of Voting Common Stock following the Conversion, and immediately prior to the closing of the Issuer's initial public offering.

F6 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of the Issuer's Class A Common Stock was automatically reclassified into one share of Voting Common Stock following the Conversion, and immediately prior to the closing of the Issuer's initial public offering.

F2 · ownership.nature: These shares are held of record by Spark Capital Founders' Fund II, L.P. ("Spark Capital FF II"). Spark Management Partners II, LLC ("SMP II") is the general partner of Spark Capital FF II. Paul Conway, Bijan Sabet, Santo Politi, and the Reporting Person, a member of the Issuer's board of directors (the "Managing Members") are the managing members of SMP II. Each of the Managing Members may be deemed to share investment, voting and dispositive power over these shares. Each of SMP II and the Managing Members disclaim beneficial ownership of these shares and this report shall not be deemed an admission that any one of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.

SEC source: 0000899243-21-021116 · doc4.xml · nonDerivative · entry 16

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

F6 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of the Issuer's Class A Common Stock was automatically reclassified into one share of Voting Common Stock following the Conversion, and immediately prior to the closing of the Issuer's initial public offering.

F6 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of the Issuer's Class A Common Stock was automatically reclassified into one share of Voting Common Stock following the Conversion, and immediately prior to the closing of the Issuer's initial public offering.

F5 · ownership.nature: These shares are held of record by Spark Capital II, L.P. ("Spark Capital II"). SMP II is the general partner of Spark Capital II. The Managing Members are the managing members of SMP II. Each of the Managing Members may be deemed to share investment, voting and dispositive power over these shares. Each of SMP II and the Managing Members disclaim beneficial ownership of these shares and this report shall not be deemed an admission that any one of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.

SEC source: 0000899243-21-021116 · doc4.xml · nonDerivative · entry 15

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

F6 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of the Issuer's Class A Common Stock was automatically reclassified into one share of Voting Common Stock following the Conversion, and immediately prior to the closing of the Issuer's initial public offering.

F6 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of the Issuer's Class A Common Stock was automatically reclassified into one share of Voting Common Stock following the Conversion, and immediately prior to the closing of the Issuer's initial public offering.

F4 · ownership.nature: These shares are held of record by Spark Capital Growth Fund, L.P. ("Spark Capital Growth"). SGMP is the general partner of Spark Capital Growth. The Managing Members are the managing members of SGMP. Each of the Managing Members may be deemed to share investment, voting and dispositive power over these shares. Each of SGMP and the Managing Members disclaim beneficial ownership of these shares and this report shall not be deemed an admission that any one of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.

SEC source: 0000899243-21-021116 · doc4.xml · nonDerivative · entry 14

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

F6 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of the Issuer's Class A Common Stock was automatically reclassified into one share of Voting Common Stock following the Conversion, and immediately prior to the closing of the Issuer's initial public offering.

F6 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of the Issuer's Class A Common Stock was automatically reclassified into one share of Voting Common Stock following the Conversion, and immediately prior to the closing of the Issuer's initial public offering.

F3 · ownership.nature: These shares are held of record by Spark Capital Growth Founders' Fund, L.P. ("Spark Capital Growth FF"). Spark Growth Management Partners, LLC ("SGMP") is the general partner of Spark Capital Growth FF. The Managing Members are the managing members of SGMP. Each of the Managing Members may be deemed to share investment, voting and dispositive power over these shares. Each of SGMP and the Managing Members disclaim beneficial ownership of these shares and this report shall not be deemed an admission that any one of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.

SEC source: 0000899243-21-021116 · doc4.xml · nonDerivative · entry 13

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

F6 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of the Issuer's Class A Common Stock was automatically reclassified into one share of Voting Common Stock following the Conversion, and immediately prior to the closing of the Issuer's initial public offering.

F6 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of the Issuer's Class A Common Stock was automatically reclassified into one share of Voting Common Stock following the Conversion, and immediately prior to the closing of the Issuer's initial public offering.

F2 · ownership.nature: These shares are held of record by Spark Capital Founders' Fund II, L.P. ("Spark Capital FF II"). Spark Management Partners II, LLC ("SMP II") is the general partner of Spark Capital FF II. Paul Conway, Bijan Sabet, Santo Politi, and the Reporting Person, a member of the Issuer's board of directors (the "Managing Members") are the managing members of SMP II. Each of the Managing Members may be deemed to share investment, voting and dispositive power over these shares. Each of SMP II and the Managing Members disclaim beneficial ownership of these shares and this report shall not be deemed an admission that any one of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.

SEC source: 0000899243-21-021116 · doc4.xml · nonDerivative · entry 12

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 14,900,181

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of the Issuer's preferred stock automatically converted on a one for one basis into Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares have no expiration date.

F5 · ownership.nature: These shares are held of record by Spark Capital II, L.P. ("Spark Capital II"). SMP II is the general partner of Spark Capital II. The Managing Members are the managing members of SMP II. Each of the Managing Members may be deemed to share investment, voting and dispositive power over these shares. Each of SMP II and the Managing Members disclaim beneficial ownership of these shares and this report shall not be deemed an admission that any one of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.

SEC source: 0000899243-21-021116 · doc4.xml · nonDerivative · entry 11

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 1,036,509

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of the Issuer's preferred stock automatically converted on a one for one basis into Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares have no expiration date.

F4 · ownership.nature: These shares are held of record by Spark Capital Growth Fund, L.P. ("Spark Capital Growth"). SGMP is the general partner of Spark Capital Growth. The Managing Members are the managing members of SGMP. Each of the Managing Members may be deemed to share investment, voting and dispositive power over these shares. Each of SGMP and the Managing Members disclaim beneficial ownership of these shares and this report shall not be deemed an admission that any one of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.

SEC source: 0000899243-21-021116 · doc4.xml · nonDerivative · entry 10

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 10,257

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of the Issuer's preferred stock automatically converted on a one for one basis into Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares have no expiration date.

F3 · ownership.nature: These shares are held of record by Spark Capital Growth Founders' Fund, L.P. ("Spark Capital Growth FF"). Spark Growth Management Partners, LLC ("SGMP") is the general partner of Spark Capital Growth FF. The Managing Members are the managing members of SGMP. Each of the Managing Members may be deemed to share investment, voting and dispositive power over these shares. Each of SGMP and the Managing Members disclaim beneficial ownership of these shares and this report shall not be deemed an admission that any one of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.

SEC source: 0000899243-21-021116 · doc4.xml · nonDerivative · entry 9

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 97,473

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of the Issuer's preferred stock automatically converted on a one for one basis into Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares have no expiration date.

F2 · ownership.nature: These shares are held of record by Spark Capital Founders' Fund II, L.P. ("Spark Capital FF II"). Spark Management Partners II, LLC ("SMP II") is the general partner of Spark Capital FF II. Paul Conway, Bijan Sabet, Santo Politi, and the Reporting Person, a member of the Issuer's board of directors (the "Managing Members") are the managing members of SMP II. Each of the Managing Members may be deemed to share investment, voting and dispositive power over these shares. Each of SMP II and the Managing Members disclaim beneficial ownership of these shares and this report shall not be deemed an admission that any one of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.

SEC source: 0000899243-21-021116 · doc4.xml · nonDerivative · entry 8

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 14,852,880

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of the Issuer's preferred stock automatically converted on a one for one basis into Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares have no expiration date.

F5 · ownership.nature: These shares are held of record by Spark Capital II, L.P. ("Spark Capital II"). SMP II is the general partner of Spark Capital II. The Managing Members are the managing members of SMP II. Each of the Managing Members may be deemed to share investment, voting and dispositive power over these shares. Each of SMP II and the Managing Members disclaim beneficial ownership of these shares and this report shall not be deemed an admission that any one of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.

SEC source: 0000899243-21-021116 · doc4.xml · nonDerivative · entry 7

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 97,164

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of the Issuer's preferred stock automatically converted on a one for one basis into Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares have no expiration date.

F2 · ownership.nature: These shares are held of record by Spark Capital Founders' Fund II, L.P. ("Spark Capital FF II"). Spark Management Partners II, LLC ("SMP II") is the general partner of Spark Capital FF II. Paul Conway, Bijan Sabet, Santo Politi, and the Reporting Person, a member of the Issuer's board of directors (the "Managing Members") are the managing members of SMP II. Each of the Managing Members may be deemed to share investment, voting and dispositive power over these shares. Each of SMP II and the Managing Members disclaim beneficial ownership of these shares and this report shall not be deemed an admission that any one of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.

SEC source: 0000899243-21-021116 · doc4.xml · nonDerivative · entry 6

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 11,798,037

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of the Issuer's preferred stock automatically converted on a one for one basis into Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares have no expiration date.

F5 · ownership.nature: These shares are held of record by Spark Capital II, L.P. ("Spark Capital II"). SMP II is the general partner of Spark Capital II. The Managing Members are the managing members of SMP II. Each of the Managing Members may be deemed to share investment, voting and dispositive power over these shares. Each of SMP II and the Managing Members disclaim beneficial ownership of these shares and this report shall not be deemed an admission that any one of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.

SEC source: 0000899243-21-021116 · doc4.xml · nonDerivative · entry 5

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 77,181

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of the Issuer's preferred stock automatically converted on a one for one basis into Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares have no expiration date.

F2 · ownership.nature: These shares are held of record by Spark Capital Founders' Fund II, L.P. ("Spark Capital FF II"). Spark Management Partners II, LLC ("SMP II") is the general partner of Spark Capital FF II. Paul Conway, Bijan Sabet, Santo Politi, and the Reporting Person, a member of the Issuer's board of directors (the "Managing Members") are the managing members of SMP II. Each of the Managing Members may be deemed to share investment, voting and dispositive power over these shares. Each of SMP II and the Managing Members disclaim beneficial ownership of these shares and this report shall not be deemed an admission that any one of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.

SEC source: 0000899243-21-021116 · doc4.xml · nonDerivative · entry 4

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 9,360,252

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of the Issuer's preferred stock automatically converted on a one for one basis into Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares have no expiration date.

F5 · ownership.nature: These shares are held of record by Spark Capital II, L.P. ("Spark Capital II"). SMP II is the general partner of Spark Capital II. The Managing Members are the managing members of SMP II. Each of the Managing Members may be deemed to share investment, voting and dispositive power over these shares. Each of SMP II and the Managing Members disclaim beneficial ownership of these shares and this report shall not be deemed an admission that any one of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.

SEC source: 0000899243-21-021116 · doc4.xml · nonDerivative · entry 3

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 61,236

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of the Issuer's preferred stock automatically converted on a one for one basis into Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares have no expiration date.

F2 · ownership.nature: These shares are held of record by Spark Capital Founders' Fund II, L.P. ("Spark Capital FF II"). Spark Management Partners II, LLC ("SMP II") is the general partner of Spark Capital FF II. Paul Conway, Bijan Sabet, Santo Politi, and the Reporting Person, a member of the Issuer's board of directors (the "Managing Members") are the managing members of SMP II. Each of the Managing Members may be deemed to share investment, voting and dispositive power over these shares. Each of SMP II and the Managing Members disclaim beneficial ownership of these shares and this report shall not be deemed an admission that any one of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.

SEC source: 0000899243-21-021116 · doc4.xml · nonDerivative · entry 2

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 8,235,213

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of the Issuer's preferred stock automatically converted on a one for one basis into Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares have no expiration date.

F5 · ownership.nature: These shares are held of record by Spark Capital II, L.P. ("Spark Capital II"). SMP II is the general partner of Spark Capital II. The Managing Members are the managing members of SMP II. Each of the Managing Members may be deemed to share investment, voting and dispositive power over these shares. Each of SMP II and the Managing Members disclaim beneficial ownership of these shares and this report shall not be deemed an admission that any one of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.

SEC source: 0000899243-21-021116 · doc4.xml · nonDerivative · entry 1

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 53,877

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of the Issuer's preferred stock automatically converted on a one for one basis into Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares have no expiration date.

F2 · ownership.nature: These shares are held of record by Spark Capital Founders' Fund II, L.P. ("Spark Capital FF II"). Spark Management Partners II, LLC ("SMP II") is the general partner of Spark Capital FF II. Paul Conway, Bijan Sabet, Santo Politi, and the Reporting Person, a member of the Issuer's board of directors (the "Managing Members") are the managing members of SMP II. Each of the Managing Members may be deemed to share investment, voting and dispositive power over these shares. Each of SMP II and the Managing Members disclaim beneficial ownership of these shares and this report shall not be deemed an admission that any one of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.

SEC source: 0000899243-21-021235 · doc4.xml · derivative · entry 12

Ossa Investments Pte. Ltd. · CIK 0001810133 · 10% owner

Hotham Investments Pte. Ltd. · CIK 0001810114 · 10% owner

Fullerton Management Pte Ltd · CIK 0001379348 · 10% owner

Temasek Holdings (Private) Ltd · CIK 0001021944 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A common stock · 144,981 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · price: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · derivative.exercise_date: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · derivative.expiration_date: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · derivative.underlying_shares: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F2 · ownership.direct: The securities reported herein are held of record by Ossa Investments Pte. Ltd. ("Ossa Investments"), which is a direct wholly-owned subsidiary of Hotham Investments Pte. Ltd. ("Hotham"). Hotham is a direct wholly-owned subsidiary of Fullerton Management Pte Ltd ("FMPL"), which in turn is a direct wholly-owned subsidiary of Temasek Holdings (Private) Limited ("Temasek Holdings"). Hotham, FMPL and Temasek Holdings may therefore be deemed to have or share beneficial ownership of the securities held by Ossa Investments.

SEC source: 0000899243-21-021235 · doc4.xml · derivative · entry 11

Ossa Investments Pte. Ltd. · CIK 0001810133 · 10% owner

Hotham Investments Pte. Ltd. · CIK 0001810114 · 10% owner

Fullerton Management Pte Ltd · CIK 0001379348 · 10% owner

Temasek Holdings (Private) Ltd · CIK 0001021944 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class B common stock · 1,873,320 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · price: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · derivative.exercise_date: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · derivative.expiration_date: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · derivative.underlying_shares: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F2 · ownership.direct: The securities reported herein are held of record by Ossa Investments Pte. Ltd. ("Ossa Investments"), which is a direct wholly-owned subsidiary of Hotham Investments Pte. Ltd. ("Hotham"). Hotham is a direct wholly-owned subsidiary of Fullerton Management Pte Ltd ("FMPL"), which in turn is a direct wholly-owned subsidiary of Temasek Holdings (Private) Limited ("Temasek Holdings"). Hotham, FMPL and Temasek Holdings may therefore be deemed to have or share beneficial ownership of the securities held by Ossa Investments.

SEC source: 0000899243-21-021235 · doc4.xml · derivative · entry 10

Ossa Investments Pte. Ltd. · CIK 0001810133 · 10% owner

Hotham Investments Pte. Ltd. · CIK 0001810114 · 10% owner

Fullerton Management Pte Ltd · CIK 0001379348 · 10% owner

Temasek Holdings (Private) Ltd · CIK 0001021944 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A common stock · 6,625,002 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · price: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · derivative.exercise_date: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · derivative.expiration_date: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · derivative.underlying_shares: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F2 · ownership.direct: The securities reported herein are held of record by Ossa Investments Pte. Ltd. ("Ossa Investments"), which is a direct wholly-owned subsidiary of Hotham Investments Pte. Ltd. ("Hotham"). Hotham is a direct wholly-owned subsidiary of Fullerton Management Pte Ltd ("FMPL"), which in turn is a direct wholly-owned subsidiary of Temasek Holdings (Private) Limited ("Temasek Holdings"). Hotham, FMPL and Temasek Holdings may therefore be deemed to have or share beneficial ownership of the securities held by Ossa Investments.

SEC source: 0000899243-21-021235 · doc4.xml · derivative · entry 9

Ossa Investments Pte. Ltd. · CIK 0001810133 · 10% owner

Hotham Investments Pte. Ltd. · CIK 0001810114 · 10% owner

Fullerton Management Pte Ltd · CIK 0001379348 · 10% owner

Temasek Holdings (Private) Ltd · CIK 0001021944 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A common stock · 547,008 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · price: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · derivative.exercise_date: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · derivative.expiration_date: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · derivative.underlying_shares: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F2 · ownership.direct: The securities reported herein are held of record by Ossa Investments Pte. Ltd. ("Ossa Investments"), which is a direct wholly-owned subsidiary of Hotham Investments Pte. Ltd. ("Hotham"). Hotham is a direct wholly-owned subsidiary of Fullerton Management Pte Ltd ("FMPL"), which in turn is a direct wholly-owned subsidiary of Temasek Holdings (Private) Limited ("Temasek Holdings"). Hotham, FMPL and Temasek Holdings may therefore be deemed to have or share beneficial ownership of the securities held by Ossa Investments.

SEC source: 0000899243-21-021235 · doc4.xml · derivative · entry 8

Ossa Investments Pte. Ltd. · CIK 0001810133 · 10% owner

Hotham Investments Pte. Ltd. · CIK 0001810114 · 10% owner

Fullerton Management Pte Ltd · CIK 0001379348 · 10% owner

Temasek Holdings (Private) Ltd · CIK 0001021944 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A common stock · 2,100,129 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · price: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · derivative.exercise_date: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · derivative.expiration_date: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · derivative.underlying_shares: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F2 · ownership.direct: The securities reported herein are held of record by Ossa Investments Pte. Ltd. ("Ossa Investments"), which is a direct wholly-owned subsidiary of Hotham Investments Pte. Ltd. ("Hotham"). Hotham is a direct wholly-owned subsidiary of Fullerton Management Pte Ltd ("FMPL"), which in turn is a direct wholly-owned subsidiary of Temasek Holdings (Private) Limited ("Temasek Holdings"). Hotham, FMPL and Temasek Holdings may therefore be deemed to have or share beneficial ownership of the securities held by Ossa Investments.

SEC source: 0000899243-21-021235 · doc4.xml · derivative · entry 7

Ossa Investments Pte. Ltd. · CIK 0001810133 · 10% owner

Hotham Investments Pte. Ltd. · CIK 0001810114 · 10% owner

Fullerton Management Pte Ltd · CIK 0001379348 · 10% owner

Temasek Holdings (Private) Ltd · CIK 0001021944 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A common stock · 97,173 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · price: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · derivative.exercise_date: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · derivative.expiration_date: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · derivative.underlying_shares: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F2 · ownership.direct: The securities reported herein are held of record by Ossa Investments Pte. Ltd. ("Ossa Investments"), which is a direct wholly-owned subsidiary of Hotham Investments Pte. Ltd. ("Hotham"). Hotham is a direct wholly-owned subsidiary of Fullerton Management Pte Ltd ("FMPL"), which in turn is a direct wholly-owned subsidiary of Temasek Holdings (Private) Limited ("Temasek Holdings"). Hotham, FMPL and Temasek Holdings may therefore be deemed to have or share beneficial ownership of the securities held by Ossa Investments.

SEC source: 0000899243-21-021235 · doc4.xml · nonDerivative · entry 6

Ossa Investments Pte. Ltd. · CIK 0001810133 · 10% owner

Hotham Investments Pte. Ltd. · CIK 0001810114 · 10% owner

Fullerton Management Pte Ltd · CIK 0001379348 · 10% owner

Temasek Holdings (Private) Ltd · CIK 0001021944 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,873,320

F1 · kind: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · price: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F2 · ownership.direct: The securities reported herein are held of record by Ossa Investments Pte. Ltd. ("Ossa Investments"), which is a direct wholly-owned subsidiary of Hotham Investments Pte. Ltd. ("Hotham"). Hotham is a direct wholly-owned subsidiary of Fullerton Management Pte Ltd ("FMPL"), which in turn is a direct wholly-owned subsidiary of Temasek Holdings (Private) Limited ("Temasek Holdings"). Hotham, FMPL and Temasek Holdings may therefore be deemed to have or share beneficial ownership of the securities held by Ossa Investments.

SEC source: 0000899243-21-021235 · doc4.xml · nonDerivative · entry 5

Ossa Investments Pte. Ltd. · CIK 0001810133 · 10% owner

Hotham Investments Pte. Ltd. · CIK 0001810114 · 10% owner

Fullerton Management Pte Ltd · CIK 0001379348 · 10% owner

Temasek Holdings (Private) Ltd · CIK 0001021944 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · kind: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · price: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F2 · ownership.direct: The securities reported herein are held of record by Ossa Investments Pte. Ltd. ("Ossa Investments"), which is a direct wholly-owned subsidiary of Hotham Investments Pte. Ltd. ("Hotham"). Hotham is a direct wholly-owned subsidiary of Fullerton Management Pte Ltd ("FMPL"), which in turn is a direct wholly-owned subsidiary of Temasek Holdings (Private) Limited ("Temasek Holdings"). Hotham, FMPL and Temasek Holdings may therefore be deemed to have or share beneficial ownership of the securities held by Ossa Investments.

SEC source: 0000899243-21-021235 · doc4.xml · nonDerivative · entry 4

Ossa Investments Pte. Ltd. · CIK 0001810133 · 10% owner

Hotham Investments Pte. Ltd. · CIK 0001810114 · 10% owner

Fullerton Management Pte Ltd · CIK 0001379348 · 10% owner

Temasek Holdings (Private) Ltd · CIK 0001021944 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,635,573

F1 · kind: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · price: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F2 · ownership.direct: The securities reported herein are held of record by Ossa Investments Pte. Ltd. ("Ossa Investments"), which is a direct wholly-owned subsidiary of Hotham Investments Pte. Ltd. ("Hotham"). Hotham is a direct wholly-owned subsidiary of Fullerton Management Pte Ltd ("FMPL"), which in turn is a direct wholly-owned subsidiary of Temasek Holdings (Private) Limited ("Temasek Holdings"). Hotham, FMPL and Temasek Holdings may therefore be deemed to have or share beneficial ownership of the securities held by Ossa Investments.

SEC source: 0000899243-21-021235 · doc4.xml · nonDerivative · entry 3

Ossa Investments Pte. Ltd. · CIK 0001810133 · 10% owner

Hotham Investments Pte. Ltd. · CIK 0001810114 · 10% owner

Fullerton Management Pte Ltd · CIK 0001379348 · 10% owner

Temasek Holdings (Private) Ltd · CIK 0001021944 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · kind: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F1 · price: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F2 · ownership.direct: The securities reported herein are held of record by Ossa Investments Pte. Ltd. ("Ossa Investments"), which is a direct wholly-owned subsidiary of Hotham Investments Pte. Ltd. ("Hotham"). Hotham is a direct wholly-owned subsidiary of Fullerton Management Pte Ltd ("FMPL"), which in turn is a direct wholly-owned subsidiary of Temasek Holdings (Private) Limited ("Temasek Holdings"). Hotham, FMPL and Temasek Holdings may therefore be deemed to have or share beneficial ownership of the securities held by Ossa Investments.

SEC source: 0000899243-21-021235 · doc4.xml · nonDerivative · entry 2

Ossa Investments Pte. Ltd. · CIK 0001810133 · 10% owner

Hotham Investments Pte. Ltd. · CIK 0001810114 · 10% owner

Fullerton Management Pte Ltd · CIK 0001379348 · 10% owner

Temasek Holdings (Private) Ltd · CIK 0001021944 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,873,320

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F2 · ownership.direct: The securities reported herein are held of record by Ossa Investments Pte. Ltd. ("Ossa Investments"), which is a direct wholly-owned subsidiary of Hotham Investments Pte. Ltd. ("Hotham"). Hotham is a direct wholly-owned subsidiary of Fullerton Management Pte Ltd ("FMPL"), which in turn is a direct wholly-owned subsidiary of Temasek Holdings (Private) Limited ("Temasek Holdings"). Hotham, FMPL and Temasek Holdings may therefore be deemed to have or share beneficial ownership of the securities held by Ossa Investments.

SEC source: 0000899243-21-021235 · doc4.xml · nonDerivative · entry 1

Ossa Investments Pte. Ltd. · CIK 0001810133 · 10% owner

Hotham Investments Pte. Ltd. · CIK 0001810114 · 10% owner

Fullerton Management Pte Ltd · CIK 0001379348 · 10% owner

Temasek Holdings (Private) Ltd · CIK 0001021944 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,635,573

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Immediately prior to the completion of the Issuer's initial public offering of its voting common stock on May 28, 2021, each share of Series A preferred stock, Series B preferred stock, Series C preferred stock, Series D preferred stock and Series F preferred stock automatically converted into one share of Class A common stock and each share of Series E-2 preferred stock automatically converted into one share of Class B common stock, in each case without payment or further consideration. The preferred stock had no expiration date. Immediately thereafter, but still prior to the completion of the initial public offering, the Class A common stock and Class B common stock were reclassified into voting common stock and non-voting common stock, respectively, in exempt transactions under Rule 16b-7.

F2 · ownership.direct: The securities reported herein are held of record by Ossa Investments Pte. Ltd. ("Ossa Investments"), which is a direct wholly-owned subsidiary of Hotham Investments Pte. Ltd. ("Hotham"). Hotham is a direct wholly-owned subsidiary of Fullerton Management Pte Ltd ("FMPL"), which in turn is a direct wholly-owned subsidiary of Temasek Holdings (Private) Limited ("Temasek Holdings"). Hotham, FMPL and Temasek Holdings may therefore be deemed to have or share beneficial ownership of the securities held by Ossa Investments.

SEC source: 0000899243-21-021452 · doc4.xml · derivative · entry 10

BAIN CAPITAL VENTURE INVESTORS, LLC · CIK 0001309469 · 10% owner

Bain Capital Venture Coinvestment Fund II, L.P. · CIK 0001756820 · 10% owner

BCV 2019-MD Coinvestment II, L.P. · CIK 0001758683 · 10% owner

Bain Capital Venture Coinvestment II Investors, LLC · CIK 0001862142 · 10% owner

BAIN CAPITAL VENTURE FUND 2014, L.P. · CIK 0001609330 · 10% owner

Bain Capital Venture Partners 2014, L.P. · CIK 0001767194 · 10% owner

Bain Capital Venture Fund 2016, L.P. · CIK 0001678394 · 10% owner

Bain Capital Venture Partners 2016, L.P. · CIK 0001862138 · 10% owner

BCIP Venture Associates · CIK 0001408649 · 10% owner

BCIP VENTURE ASSOCIATES-B · CIK 0001408676 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 0

Underlying: Class A Common Stock · 7,700,250 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F1 · price: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F1 · derivative.exercise_date: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F1 · derivative.expiration_date: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F3 · ownership.nature: In the Conversion, the 488,607 shares of Series A Preferred Stock, 915,603 shares of Series B Preferred Stock and 6,819,693 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014") automatically converted into an aggregate of 8,223,903 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2014 held 13,573,035 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 13,573,035 shares of the Issuer's Voting Common Stock in the Reclassification.

F4 · ownership.nature: In the Conversion, the 11,376 shares of Series A Preferred Stock, 245,901 shares of Series B Preferred Stock and 64,047 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016") automatically converted into an aggregate of 321,324 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2016 held 665,271 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 665,271 shares of the Issuer's Voting Common Stock in the Reclassification.

F5 · ownership.nature: In the Conversion, the 49,803 shares of Series A Preferred Stock, 93,345 shares of Series B Preferred Stock and 695,265 shares of Series C Preferred Stock held by BCIP Venture Associates ("BCIP Venture") automatically converted into an aggregate of 838,413 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture held 1,383,753 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 1,383,753 shares of the Issuer's Voting Common Stock in the Reclassification.

F6 · ownership.nature: In the Conversion, the 3,357 shares of Series A Preferred Stock, 6,279 shares of Series B Preferred Stock and 46,773 shares of Series C Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B") automatically converted into an aggregate of 56,409 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture-B held 93,096 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 93,096 shares of the Issuer's Voting Common Stock in the Reclassification.

F7 · ownership.nature: In the Conversion, the 1,137 shares of Series A Preferred Stock, 47,454 shares of Series B Preferred Stock, 15,030 shares of Series B-1 Preferred Stock and 12,504 shares of Series C Preferred Stock held by BCIP Venture Associates II, LP ("BCIP Venture II") automatically converted into an aggregate of 76,125 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II held 110,520 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 110,520 shares of the Issuer's Voting Common Stock in the Reclassification.

F8 · ownership.nature: In the Conversion, the 96 shares of Series A Preferred Stock, 3,402 shares of Series B Preferred Stock, 888 shares of Series B-1 Preferred Stock and 894 shares of Series C Preferred Stock held by BCIP Venture Associates II-B, LP ("BCIP Venture II-B") automatically converted into an aggregate of 5,280 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II-B held 8,145 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 8,145 shares of the Issuer's Voting Common Stock in the Reclassification.

F9 · ownership.nature: In the Conversion, the 220,146 shares of Series B Preferred Stock, 144,729 shares of Series B-1 Preferred Stock and 58,725 shares of Series C Preferred Stock held by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") automatically converted into an aggregate of 423,600 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Coinvestment Fund II held 423,600 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 423,600 shares of the Issuer's Voting Common Stock in the Reclassification.

F10 · ownership.nature: In the Conversion, the 8,805 shares of Series B Preferred Stock, 5,790 shares of Series B-1 Preferred Stock and 2,349 shares of Series C Preferred Stock held by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and, together with Venture Fund 2014, Venture Fund 2016, BCIP Venture, BCIP Venture-B, BCIP Venture II, BCIP Venture II-B and Venture Coinvestment Fund II, the "Bain Capital Venture Entities") automatically converted into an aggregate of 16,944 shares of the Issuer's Class A Common Stock. Following the Conversion, 2019-MD Coinvestment II held 16,944 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 16,944 shares of the Issuer's Voting Common Stock in the Reclassification.

F11 · ownership.nature: Bain Capital Venture Investors, LLC ("BCVI") is (i) the general partner of Bain Capital Venture Partners 2014, L.P. ("Venture Partners 2014"), which is the general partner of Venture Fund 2014, (ii) the general partner of Bain Capital Venture Partners 2016, L.P. ("Venture Partners 2016"), which is the general partner of Venture Fund 2016 and (iii) the manager of Bain Capital Venture Coinvestment II Investors, LLC ("Venture Coinvestment II Investors"), which is the general partner of each of Venture Coinvestment Fund II and 2019-MD Coinvestment II. Boylston Coinvestors, LLC is (i) the managing partner of each of BCIP Venture and BCIP Venture-B and (ii) the general partner of each of BCIP Venture II and BCIP Venture II-B. The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal.

F12 · ownership.nature: (Continued From Footnote 11) As a result, each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to all of the securities held by the Bain Capital Venture Entities. Each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal disclaims beneficial ownership of such securities except to the extent of its or his pecuniary interest therein.

SEC source: 0000899243-21-021452 · doc4.xml · derivative · entry 9

BAIN CAPITAL VENTURE INVESTORS, LLC · CIK 0001309469 · 10% owner

Bain Capital Venture Coinvestment Fund II, L.P. · CIK 0001756820 · 10% owner

BCV 2019-MD Coinvestment II, L.P. · CIK 0001758683 · 10% owner

Bain Capital Venture Coinvestment II Investors, LLC · CIK 0001862142 · 10% owner

BAIN CAPITAL VENTURE FUND 2014, L.P. · CIK 0001609330 · 10% owner

Bain Capital Venture Partners 2014, L.P. · CIK 0001767194 · 10% owner

Bain Capital Venture Fund 2016, L.P. · CIK 0001678394 · 10% owner

Bain Capital Venture Partners 2016, L.P. · CIK 0001862138 · 10% owner

BCIP Venture Associates · CIK 0001408649 · 10% owner

BCIP VENTURE ASSOCIATES-B · CIK 0001408676 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 0

Underlying: Class A Common Stock · 166,437 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F1 · price: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F1 · derivative.exercise_date: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F1 · derivative.expiration_date: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F3 · ownership.nature: In the Conversion, the 488,607 shares of Series A Preferred Stock, 915,603 shares of Series B Preferred Stock and 6,819,693 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014") automatically converted into an aggregate of 8,223,903 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2014 held 13,573,035 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 13,573,035 shares of the Issuer's Voting Common Stock in the Reclassification.

F4 · ownership.nature: In the Conversion, the 11,376 shares of Series A Preferred Stock, 245,901 shares of Series B Preferred Stock and 64,047 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016") automatically converted into an aggregate of 321,324 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2016 held 665,271 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 665,271 shares of the Issuer's Voting Common Stock in the Reclassification.

F5 · ownership.nature: In the Conversion, the 49,803 shares of Series A Preferred Stock, 93,345 shares of Series B Preferred Stock and 695,265 shares of Series C Preferred Stock held by BCIP Venture Associates ("BCIP Venture") automatically converted into an aggregate of 838,413 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture held 1,383,753 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 1,383,753 shares of the Issuer's Voting Common Stock in the Reclassification.

F6 · ownership.nature: In the Conversion, the 3,357 shares of Series A Preferred Stock, 6,279 shares of Series B Preferred Stock and 46,773 shares of Series C Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B") automatically converted into an aggregate of 56,409 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture-B held 93,096 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 93,096 shares of the Issuer's Voting Common Stock in the Reclassification.

F7 · ownership.nature: In the Conversion, the 1,137 shares of Series A Preferred Stock, 47,454 shares of Series B Preferred Stock, 15,030 shares of Series B-1 Preferred Stock and 12,504 shares of Series C Preferred Stock held by BCIP Venture Associates II, LP ("BCIP Venture II") automatically converted into an aggregate of 76,125 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II held 110,520 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 110,520 shares of the Issuer's Voting Common Stock in the Reclassification.

F8 · ownership.nature: In the Conversion, the 96 shares of Series A Preferred Stock, 3,402 shares of Series B Preferred Stock, 888 shares of Series B-1 Preferred Stock and 894 shares of Series C Preferred Stock held by BCIP Venture Associates II-B, LP ("BCIP Venture II-B") automatically converted into an aggregate of 5,280 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II-B held 8,145 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 8,145 shares of the Issuer's Voting Common Stock in the Reclassification.

F9 · ownership.nature: In the Conversion, the 220,146 shares of Series B Preferred Stock, 144,729 shares of Series B-1 Preferred Stock and 58,725 shares of Series C Preferred Stock held by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") automatically converted into an aggregate of 423,600 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Coinvestment Fund II held 423,600 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 423,600 shares of the Issuer's Voting Common Stock in the Reclassification.

F10 · ownership.nature: In the Conversion, the 8,805 shares of Series B Preferred Stock, 5,790 shares of Series B-1 Preferred Stock and 2,349 shares of Series C Preferred Stock held by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and, together with Venture Fund 2014, Venture Fund 2016, BCIP Venture, BCIP Venture-B, BCIP Venture II, BCIP Venture II-B and Venture Coinvestment Fund II, the "Bain Capital Venture Entities") automatically converted into an aggregate of 16,944 shares of the Issuer's Class A Common Stock. Following the Conversion, 2019-MD Coinvestment II held 16,944 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 16,944 shares of the Issuer's Voting Common Stock in the Reclassification.

F11 · ownership.nature: Bain Capital Venture Investors, LLC ("BCVI") is (i) the general partner of Bain Capital Venture Partners 2014, L.P. ("Venture Partners 2014"), which is the general partner of Venture Fund 2014, (ii) the general partner of Bain Capital Venture Partners 2016, L.P. ("Venture Partners 2016"), which is the general partner of Venture Fund 2016 and (iii) the manager of Bain Capital Venture Coinvestment II Investors, LLC ("Venture Coinvestment II Investors"), which is the general partner of each of Venture Coinvestment Fund II and 2019-MD Coinvestment II. Boylston Coinvestors, LLC is (i) the managing partner of each of BCIP Venture and BCIP Venture-B and (ii) the general partner of each of BCIP Venture II and BCIP Venture II-B. The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal.

F12 · ownership.nature: (Continued From Footnote 11) As a result, each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to all of the securities held by the Bain Capital Venture Entities. Each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal disclaims beneficial ownership of such securities except to the extent of its or his pecuniary interest therein.

SEC source: 0000899243-21-021452 · doc4.xml · derivative · entry 8

BAIN CAPITAL VENTURE INVESTORS, LLC · CIK 0001309469 · 10% owner

Bain Capital Venture Coinvestment Fund II, L.P. · CIK 0001756820 · 10% owner

BCV 2019-MD Coinvestment II, L.P. · CIK 0001758683 · 10% owner

Bain Capital Venture Coinvestment II Investors, LLC · CIK 0001862142 · 10% owner

BAIN CAPITAL VENTURE FUND 2014, L.P. · CIK 0001609330 · 10% owner

Bain Capital Venture Partners 2014, L.P. · CIK 0001767194 · 10% owner

Bain Capital Venture Fund 2016, L.P. · CIK 0001678394 · 10% owner

Bain Capital Venture Partners 2016, L.P. · CIK 0001862138 · 10% owner

BCIP Venture Associates · CIK 0001408649 · 10% owner

BCIP VENTURE ASSOCIATES-B · CIK 0001408676 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 0

Underlying: Class A Common Stock · 1,540,935 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F1 · price: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F1 · derivative.exercise_date: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F1 · derivative.expiration_date: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F3 · ownership.nature: In the Conversion, the 488,607 shares of Series A Preferred Stock, 915,603 shares of Series B Preferred Stock and 6,819,693 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014") automatically converted into an aggregate of 8,223,903 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2014 held 13,573,035 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 13,573,035 shares of the Issuer's Voting Common Stock in the Reclassification.

F4 · ownership.nature: In the Conversion, the 11,376 shares of Series A Preferred Stock, 245,901 shares of Series B Preferred Stock and 64,047 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016") automatically converted into an aggregate of 321,324 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2016 held 665,271 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 665,271 shares of the Issuer's Voting Common Stock in the Reclassification.

F5 · ownership.nature: In the Conversion, the 49,803 shares of Series A Preferred Stock, 93,345 shares of Series B Preferred Stock and 695,265 shares of Series C Preferred Stock held by BCIP Venture Associates ("BCIP Venture") automatically converted into an aggregate of 838,413 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture held 1,383,753 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 1,383,753 shares of the Issuer's Voting Common Stock in the Reclassification.

F6 · ownership.nature: In the Conversion, the 3,357 shares of Series A Preferred Stock, 6,279 shares of Series B Preferred Stock and 46,773 shares of Series C Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B") automatically converted into an aggregate of 56,409 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture-B held 93,096 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 93,096 shares of the Issuer's Voting Common Stock in the Reclassification.

F7 · ownership.nature: In the Conversion, the 1,137 shares of Series A Preferred Stock, 47,454 shares of Series B Preferred Stock, 15,030 shares of Series B-1 Preferred Stock and 12,504 shares of Series C Preferred Stock held by BCIP Venture Associates II, LP ("BCIP Venture II") automatically converted into an aggregate of 76,125 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II held 110,520 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 110,520 shares of the Issuer's Voting Common Stock in the Reclassification.

F8 · ownership.nature: In the Conversion, the 96 shares of Series A Preferred Stock, 3,402 shares of Series B Preferred Stock, 888 shares of Series B-1 Preferred Stock and 894 shares of Series C Preferred Stock held by BCIP Venture Associates II-B, LP ("BCIP Venture II-B") automatically converted into an aggregate of 5,280 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II-B held 8,145 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 8,145 shares of the Issuer's Voting Common Stock in the Reclassification.

F9 · ownership.nature: In the Conversion, the 220,146 shares of Series B Preferred Stock, 144,729 shares of Series B-1 Preferred Stock and 58,725 shares of Series C Preferred Stock held by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") automatically converted into an aggregate of 423,600 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Coinvestment Fund II held 423,600 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 423,600 shares of the Issuer's Voting Common Stock in the Reclassification.

F10 · ownership.nature: In the Conversion, the 8,805 shares of Series B Preferred Stock, 5,790 shares of Series B-1 Preferred Stock and 2,349 shares of Series C Preferred Stock held by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and, together with Venture Fund 2014, Venture Fund 2016, BCIP Venture, BCIP Venture-B, BCIP Venture II, BCIP Venture II-B and Venture Coinvestment Fund II, the "Bain Capital Venture Entities") automatically converted into an aggregate of 16,944 shares of the Issuer's Class A Common Stock. Following the Conversion, 2019-MD Coinvestment II held 16,944 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 16,944 shares of the Issuer's Voting Common Stock in the Reclassification.

F11 · ownership.nature: Bain Capital Venture Investors, LLC ("BCVI") is (i) the general partner of Bain Capital Venture Partners 2014, L.P. ("Venture Partners 2014"), which is the general partner of Venture Fund 2014, (ii) the general partner of Bain Capital Venture Partners 2016, L.P. ("Venture Partners 2016"), which is the general partner of Venture Fund 2016 and (iii) the manager of Bain Capital Venture Coinvestment II Investors, LLC ("Venture Coinvestment II Investors"), which is the general partner of each of Venture Coinvestment Fund II and 2019-MD Coinvestment II. Boylston Coinvestors, LLC is (i) the managing partner of each of BCIP Venture and BCIP Venture-B and (ii) the general partner of each of BCIP Venture II and BCIP Venture II-B. The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal.

F12 · ownership.nature: (Continued From Footnote 11) As a result, each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to all of the securities held by the Bain Capital Venture Entities. Each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal disclaims beneficial ownership of such securities except to the extent of its or his pecuniary interest therein.

SEC source: 0000899243-21-021452 · doc4.xml · derivative · entry 7

BAIN CAPITAL VENTURE INVESTORS, LLC · CIK 0001309469 · 10% owner

Bain Capital Venture Coinvestment Fund II, L.P. · CIK 0001756820 · 10% owner

BCV 2019-MD Coinvestment II, L.P. · CIK 0001758683 · 10% owner

Bain Capital Venture Coinvestment II Investors, LLC · CIK 0001862142 · 10% owner

BAIN CAPITAL VENTURE FUND 2014, L.P. · CIK 0001609330 · 10% owner

Bain Capital Venture Partners 2014, L.P. · CIK 0001767194 · 10% owner

Bain Capital Venture Fund 2016, L.P. · CIK 0001678394 · 10% owner

Bain Capital Venture Partners 2016, L.P. · CIK 0001862138 · 10% owner

BCIP Venture Associates · CIK 0001408649 · 10% owner

BCIP VENTURE ASSOCIATES-B · CIK 0001408676 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 0

Underlying: Class A Common Stock · 554,376 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F1 · price: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F1 · derivative.exercise_date: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F1 · derivative.expiration_date: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F3 · ownership.nature: In the Conversion, the 488,607 shares of Series A Preferred Stock, 915,603 shares of Series B Preferred Stock and 6,819,693 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014") automatically converted into an aggregate of 8,223,903 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2014 held 13,573,035 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 13,573,035 shares of the Issuer's Voting Common Stock in the Reclassification.

F4 · ownership.nature: In the Conversion, the 11,376 shares of Series A Preferred Stock, 245,901 shares of Series B Preferred Stock and 64,047 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016") automatically converted into an aggregate of 321,324 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2016 held 665,271 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 665,271 shares of the Issuer's Voting Common Stock in the Reclassification.

F5 · ownership.nature: In the Conversion, the 49,803 shares of Series A Preferred Stock, 93,345 shares of Series B Preferred Stock and 695,265 shares of Series C Preferred Stock held by BCIP Venture Associates ("BCIP Venture") automatically converted into an aggregate of 838,413 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture held 1,383,753 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 1,383,753 shares of the Issuer's Voting Common Stock in the Reclassification.

F6 · ownership.nature: In the Conversion, the 3,357 shares of Series A Preferred Stock, 6,279 shares of Series B Preferred Stock and 46,773 shares of Series C Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B") automatically converted into an aggregate of 56,409 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture-B held 93,096 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 93,096 shares of the Issuer's Voting Common Stock in the Reclassification.

F7 · ownership.nature: In the Conversion, the 1,137 shares of Series A Preferred Stock, 47,454 shares of Series B Preferred Stock, 15,030 shares of Series B-1 Preferred Stock and 12,504 shares of Series C Preferred Stock held by BCIP Venture Associates II, LP ("BCIP Venture II") automatically converted into an aggregate of 76,125 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II held 110,520 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 110,520 shares of the Issuer's Voting Common Stock in the Reclassification.

F8 · ownership.nature: In the Conversion, the 96 shares of Series A Preferred Stock, 3,402 shares of Series B Preferred Stock, 888 shares of Series B-1 Preferred Stock and 894 shares of Series C Preferred Stock held by BCIP Venture Associates II-B, LP ("BCIP Venture II-B") automatically converted into an aggregate of 5,280 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II-B held 8,145 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 8,145 shares of the Issuer's Voting Common Stock in the Reclassification.

F9 · ownership.nature: In the Conversion, the 220,146 shares of Series B Preferred Stock, 144,729 shares of Series B-1 Preferred Stock and 58,725 shares of Series C Preferred Stock held by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") automatically converted into an aggregate of 423,600 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Coinvestment Fund II held 423,600 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 423,600 shares of the Issuer's Voting Common Stock in the Reclassification.

F10 · ownership.nature: In the Conversion, the 8,805 shares of Series B Preferred Stock, 5,790 shares of Series B-1 Preferred Stock and 2,349 shares of Series C Preferred Stock held by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and, together with Venture Fund 2014, Venture Fund 2016, BCIP Venture, BCIP Venture-B, BCIP Venture II, BCIP Venture II-B and Venture Coinvestment Fund II, the "Bain Capital Venture Entities") automatically converted into an aggregate of 16,944 shares of the Issuer's Class A Common Stock. Following the Conversion, 2019-MD Coinvestment II held 16,944 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 16,944 shares of the Issuer's Voting Common Stock in the Reclassification.

F11 · ownership.nature: Bain Capital Venture Investors, LLC ("BCVI") is (i) the general partner of Bain Capital Venture Partners 2014, L.P. ("Venture Partners 2014"), which is the general partner of Venture Fund 2014, (ii) the general partner of Bain Capital Venture Partners 2016, L.P. ("Venture Partners 2016"), which is the general partner of Venture Fund 2016 and (iii) the manager of Bain Capital Venture Coinvestment II Investors, LLC ("Venture Coinvestment II Investors"), which is the general partner of each of Venture Coinvestment Fund II and 2019-MD Coinvestment II. Boylston Coinvestors, LLC is (i) the managing partner of each of BCIP Venture and BCIP Venture-B and (ii) the general partner of each of BCIP Venture II and BCIP Venture II-B. The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal.

F12 · ownership.nature: (Continued From Footnote 11) As a result, each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to all of the securities held by the Bain Capital Venture Entities. Each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal disclaims beneficial ownership of such securities except to the extent of its or his pecuniary interest therein.

SEC source: 0000899243-21-021452 · doc4.xml · nonDerivative · entry 6

BAIN CAPITAL VENTURE INVESTORS, LLC · CIK 0001309469 · 10% owner

Bain Capital Venture Coinvestment Fund II, L.P. · CIK 0001756820 · 10% owner

BCV 2019-MD Coinvestment II, L.P. · CIK 0001758683 · 10% owner

Bain Capital Venture Coinvestment II Investors, LLC · CIK 0001862142 · 10% owner

BAIN CAPITAL VENTURE FUND 2014, L.P. · CIK 0001609330 · 10% owner

Bain Capital Venture Partners 2014, L.P. · CIK 0001767194 · 10% owner

Bain Capital Venture Fund 2016, L.P. · CIK 0001678394 · 10% owner

Bain Capital Venture Partners 2016, L.P. · CIK 0001862138 · 10% owner

BCIP Venture Associates · CIK 0001408649 · 10% owner

BCIP VENTURE ASSOCIATES-B · CIK 0001408676 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 16,274,364

F2 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of the Issuer's Class A Common Stock was reclassified into one share of the Issuer's Voting Common Stock following the Conversion and immediately prior to the closing of the Issuer's initial public offering (the "Reclassification").

F2 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of the Issuer's Class A Common Stock was reclassified into one share of the Issuer's Voting Common Stock following the Conversion and immediately prior to the closing of the Issuer's initial public offering (the "Reclassification").

F3 · ownership.nature: In the Conversion, the 488,607 shares of Series A Preferred Stock, 915,603 shares of Series B Preferred Stock and 6,819,693 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014") automatically converted into an aggregate of 8,223,903 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2014 held 13,573,035 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 13,573,035 shares of the Issuer's Voting Common Stock in the Reclassification.

F4 · ownership.nature: In the Conversion, the 11,376 shares of Series A Preferred Stock, 245,901 shares of Series B Preferred Stock and 64,047 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016") automatically converted into an aggregate of 321,324 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2016 held 665,271 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 665,271 shares of the Issuer's Voting Common Stock in the Reclassification.

F5 · ownership.nature: In the Conversion, the 49,803 shares of Series A Preferred Stock, 93,345 shares of Series B Preferred Stock and 695,265 shares of Series C Preferred Stock held by BCIP Venture Associates ("BCIP Venture") automatically converted into an aggregate of 838,413 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture held 1,383,753 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 1,383,753 shares of the Issuer's Voting Common Stock in the Reclassification.

F6 · ownership.nature: In the Conversion, the 3,357 shares of Series A Preferred Stock, 6,279 shares of Series B Preferred Stock and 46,773 shares of Series C Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B") automatically converted into an aggregate of 56,409 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture-B held 93,096 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 93,096 shares of the Issuer's Voting Common Stock in the Reclassification.

F7 · ownership.nature: In the Conversion, the 1,137 shares of Series A Preferred Stock, 47,454 shares of Series B Preferred Stock, 15,030 shares of Series B-1 Preferred Stock and 12,504 shares of Series C Preferred Stock held by BCIP Venture Associates II, LP ("BCIP Venture II") automatically converted into an aggregate of 76,125 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II held 110,520 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 110,520 shares of the Issuer's Voting Common Stock in the Reclassification.

F8 · ownership.nature: In the Conversion, the 96 shares of Series A Preferred Stock, 3,402 shares of Series B Preferred Stock, 888 shares of Series B-1 Preferred Stock and 894 shares of Series C Preferred Stock held by BCIP Venture Associates II-B, LP ("BCIP Venture II-B") automatically converted into an aggregate of 5,280 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II-B held 8,145 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 8,145 shares of the Issuer's Voting Common Stock in the Reclassification.

F9 · ownership.nature: In the Conversion, the 220,146 shares of Series B Preferred Stock, 144,729 shares of Series B-1 Preferred Stock and 58,725 shares of Series C Preferred Stock held by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") automatically converted into an aggregate of 423,600 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Coinvestment Fund II held 423,600 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 423,600 shares of the Issuer's Voting Common Stock in the Reclassification.

F10 · ownership.nature: In the Conversion, the 8,805 shares of Series B Preferred Stock, 5,790 shares of Series B-1 Preferred Stock and 2,349 shares of Series C Preferred Stock held by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and, together with Venture Fund 2014, Venture Fund 2016, BCIP Venture, BCIP Venture-B, BCIP Venture II, BCIP Venture II-B and Venture Coinvestment Fund II, the "Bain Capital Venture Entities") automatically converted into an aggregate of 16,944 shares of the Issuer's Class A Common Stock. Following the Conversion, 2019-MD Coinvestment II held 16,944 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 16,944 shares of the Issuer's Voting Common Stock in the Reclassification.

F11 · ownership.nature: Bain Capital Venture Investors, LLC ("BCVI") is (i) the general partner of Bain Capital Venture Partners 2014, L.P. ("Venture Partners 2014"), which is the general partner of Venture Fund 2014, (ii) the general partner of Bain Capital Venture Partners 2016, L.P. ("Venture Partners 2016"), which is the general partner of Venture Fund 2016 and (iii) the manager of Bain Capital Venture Coinvestment II Investors, LLC ("Venture Coinvestment II Investors"), which is the general partner of each of Venture Coinvestment Fund II and 2019-MD Coinvestment II. Boylston Coinvestors, LLC is (i) the managing partner of each of BCIP Venture and BCIP Venture-B and (ii) the general partner of each of BCIP Venture II and BCIP Venture II-B. The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal.

F12 · ownership.nature: (Continued From Footnote 11) As a result, each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to all of the securities held by the Bain Capital Venture Entities. Each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal disclaims beneficial ownership of such securities except to the extent of its or his pecuniary interest therein.

SEC source: 0000899243-21-021452 · doc4.xml · nonDerivative · entry 5

BAIN CAPITAL VENTURE INVESTORS, LLC · CIK 0001309469 · 10% owner

Bain Capital Venture Coinvestment Fund II, L.P. · CIK 0001756820 · 10% owner

BCV 2019-MD Coinvestment II, L.P. · CIK 0001758683 · 10% owner

Bain Capital Venture Coinvestment II Investors, LLC · CIK 0001862142 · 10% owner

BAIN CAPITAL VENTURE FUND 2014, L.P. · CIK 0001609330 · 10% owner

Bain Capital Venture Partners 2014, L.P. · CIK 0001767194 · 10% owner

Bain Capital Venture Fund 2016, L.P. · CIK 0001678394 · 10% owner

Bain Capital Venture Partners 2016, L.P. · CIK 0001862138 · 10% owner

BCIP Venture Associates · CIK 0001408649 · 10% owner

BCIP VENTURE ASSOCIATES-B · CIK 0001408676 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 0

F2 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of the Issuer's Class A Common Stock was reclassified into one share of the Issuer's Voting Common Stock following the Conversion and immediately prior to the closing of the Issuer's initial public offering (the "Reclassification").

F2 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of the Issuer's Class A Common Stock was reclassified into one share of the Issuer's Voting Common Stock following the Conversion and immediately prior to the closing of the Issuer's initial public offering (the "Reclassification").

F3 · ownership.nature: In the Conversion, the 488,607 shares of Series A Preferred Stock, 915,603 shares of Series B Preferred Stock and 6,819,693 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014") automatically converted into an aggregate of 8,223,903 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2014 held 13,573,035 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 13,573,035 shares of the Issuer's Voting Common Stock in the Reclassification.

F4 · ownership.nature: In the Conversion, the 11,376 shares of Series A Preferred Stock, 245,901 shares of Series B Preferred Stock and 64,047 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016") automatically converted into an aggregate of 321,324 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2016 held 665,271 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 665,271 shares of the Issuer's Voting Common Stock in the Reclassification.

F5 · ownership.nature: In the Conversion, the 49,803 shares of Series A Preferred Stock, 93,345 shares of Series B Preferred Stock and 695,265 shares of Series C Preferred Stock held by BCIP Venture Associates ("BCIP Venture") automatically converted into an aggregate of 838,413 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture held 1,383,753 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 1,383,753 shares of the Issuer's Voting Common Stock in the Reclassification.

F6 · ownership.nature: In the Conversion, the 3,357 shares of Series A Preferred Stock, 6,279 shares of Series B Preferred Stock and 46,773 shares of Series C Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B") automatically converted into an aggregate of 56,409 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture-B held 93,096 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 93,096 shares of the Issuer's Voting Common Stock in the Reclassification.

F7 · ownership.nature: In the Conversion, the 1,137 shares of Series A Preferred Stock, 47,454 shares of Series B Preferred Stock, 15,030 shares of Series B-1 Preferred Stock and 12,504 shares of Series C Preferred Stock held by BCIP Venture Associates II, LP ("BCIP Venture II") automatically converted into an aggregate of 76,125 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II held 110,520 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 110,520 shares of the Issuer's Voting Common Stock in the Reclassification.

F8 · ownership.nature: In the Conversion, the 96 shares of Series A Preferred Stock, 3,402 shares of Series B Preferred Stock, 888 shares of Series B-1 Preferred Stock and 894 shares of Series C Preferred Stock held by BCIP Venture Associates II-B, LP ("BCIP Venture II-B") automatically converted into an aggregate of 5,280 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II-B held 8,145 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 8,145 shares of the Issuer's Voting Common Stock in the Reclassification.

F9 · ownership.nature: In the Conversion, the 220,146 shares of Series B Preferred Stock, 144,729 shares of Series B-1 Preferred Stock and 58,725 shares of Series C Preferred Stock held by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") automatically converted into an aggregate of 423,600 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Coinvestment Fund II held 423,600 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 423,600 shares of the Issuer's Voting Common Stock in the Reclassification.

F10 · ownership.nature: In the Conversion, the 8,805 shares of Series B Preferred Stock, 5,790 shares of Series B-1 Preferred Stock and 2,349 shares of Series C Preferred Stock held by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and, together with Venture Fund 2014, Venture Fund 2016, BCIP Venture, BCIP Venture-B, BCIP Venture II, BCIP Venture II-B and Venture Coinvestment Fund II, the "Bain Capital Venture Entities") automatically converted into an aggregate of 16,944 shares of the Issuer's Class A Common Stock. Following the Conversion, 2019-MD Coinvestment II held 16,944 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 16,944 shares of the Issuer's Voting Common Stock in the Reclassification.

F11 · ownership.nature: Bain Capital Venture Investors, LLC ("BCVI") is (i) the general partner of Bain Capital Venture Partners 2014, L.P. ("Venture Partners 2014"), which is the general partner of Venture Fund 2014, (ii) the general partner of Bain Capital Venture Partners 2016, L.P. ("Venture Partners 2016"), which is the general partner of Venture Fund 2016 and (iii) the manager of Bain Capital Venture Coinvestment II Investors, LLC ("Venture Coinvestment II Investors"), which is the general partner of each of Venture Coinvestment Fund II and 2019-MD Coinvestment II. Boylston Coinvestors, LLC is (i) the managing partner of each of BCIP Venture and BCIP Venture-B and (ii) the general partner of each of BCIP Venture II and BCIP Venture II-B. The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal.

F12 · ownership.nature: (Continued From Footnote 11) As a result, each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to all of the securities held by the Bain Capital Venture Entities. Each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal disclaims beneficial ownership of such securities except to the extent of its or his pecuniary interest therein.

SEC source: 0000899243-21-021452 · doc4.xml · nonDerivative · entry 4

BAIN CAPITAL VENTURE INVESTORS, LLC · CIK 0001309469 · 10% owner

Bain Capital Venture Coinvestment Fund II, L.P. · CIK 0001756820 · 10% owner

BCV 2019-MD Coinvestment II, L.P. · CIK 0001758683 · 10% owner

Bain Capital Venture Coinvestment II Investors, LLC · CIK 0001862142 · 10% owner

BAIN CAPITAL VENTURE FUND 2014, L.P. · CIK 0001609330 · 10% owner

Bain Capital Venture Partners 2014, L.P. · CIK 0001767194 · 10% owner

Bain Capital Venture Fund 2016, L.P. · CIK 0001678394 · 10% owner

Bain Capital Venture Partners 2016, L.P. · CIK 0001862138 · 10% owner

BCIP Venture Associates · CIK 0001408649 · 10% owner

BCIP VENTURE ASSOCIATES-B · CIK 0001408676 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 16,274,364

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F3 · ownership.nature: In the Conversion, the 488,607 shares of Series A Preferred Stock, 915,603 shares of Series B Preferred Stock and 6,819,693 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014") automatically converted into an aggregate of 8,223,903 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2014 held 13,573,035 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 13,573,035 shares of the Issuer's Voting Common Stock in the Reclassification.

F4 · ownership.nature: In the Conversion, the 11,376 shares of Series A Preferred Stock, 245,901 shares of Series B Preferred Stock and 64,047 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016") automatically converted into an aggregate of 321,324 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2016 held 665,271 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 665,271 shares of the Issuer's Voting Common Stock in the Reclassification.

F5 · ownership.nature: In the Conversion, the 49,803 shares of Series A Preferred Stock, 93,345 shares of Series B Preferred Stock and 695,265 shares of Series C Preferred Stock held by BCIP Venture Associates ("BCIP Venture") automatically converted into an aggregate of 838,413 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture held 1,383,753 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 1,383,753 shares of the Issuer's Voting Common Stock in the Reclassification.

F6 · ownership.nature: In the Conversion, the 3,357 shares of Series A Preferred Stock, 6,279 shares of Series B Preferred Stock and 46,773 shares of Series C Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B") automatically converted into an aggregate of 56,409 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture-B held 93,096 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 93,096 shares of the Issuer's Voting Common Stock in the Reclassification.

F7 · ownership.nature: In the Conversion, the 1,137 shares of Series A Preferred Stock, 47,454 shares of Series B Preferred Stock, 15,030 shares of Series B-1 Preferred Stock and 12,504 shares of Series C Preferred Stock held by BCIP Venture Associates II, LP ("BCIP Venture II") automatically converted into an aggregate of 76,125 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II held 110,520 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 110,520 shares of the Issuer's Voting Common Stock in the Reclassification.

F8 · ownership.nature: In the Conversion, the 96 shares of Series A Preferred Stock, 3,402 shares of Series B Preferred Stock, 888 shares of Series B-1 Preferred Stock and 894 shares of Series C Preferred Stock held by BCIP Venture Associates II-B, LP ("BCIP Venture II-B") automatically converted into an aggregate of 5,280 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II-B held 8,145 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 8,145 shares of the Issuer's Voting Common Stock in the Reclassification.

F9 · ownership.nature: In the Conversion, the 220,146 shares of Series B Preferred Stock, 144,729 shares of Series B-1 Preferred Stock and 58,725 shares of Series C Preferred Stock held by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") automatically converted into an aggregate of 423,600 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Coinvestment Fund II held 423,600 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 423,600 shares of the Issuer's Voting Common Stock in the Reclassification.

F10 · ownership.nature: In the Conversion, the 8,805 shares of Series B Preferred Stock, 5,790 shares of Series B-1 Preferred Stock and 2,349 shares of Series C Preferred Stock held by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and, together with Venture Fund 2014, Venture Fund 2016, BCIP Venture, BCIP Venture-B, BCIP Venture II, BCIP Venture II-B and Venture Coinvestment Fund II, the "Bain Capital Venture Entities") automatically converted into an aggregate of 16,944 shares of the Issuer's Class A Common Stock. Following the Conversion, 2019-MD Coinvestment II held 16,944 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 16,944 shares of the Issuer's Voting Common Stock in the Reclassification.

F11 · ownership.nature: Bain Capital Venture Investors, LLC ("BCVI") is (i) the general partner of Bain Capital Venture Partners 2014, L.P. ("Venture Partners 2014"), which is the general partner of Venture Fund 2014, (ii) the general partner of Bain Capital Venture Partners 2016, L.P. ("Venture Partners 2016"), which is the general partner of Venture Fund 2016 and (iii) the manager of Bain Capital Venture Coinvestment II Investors, LLC ("Venture Coinvestment II Investors"), which is the general partner of each of Venture Coinvestment Fund II and 2019-MD Coinvestment II. Boylston Coinvestors, LLC is (i) the managing partner of each of BCIP Venture and BCIP Venture-B and (ii) the general partner of each of BCIP Venture II and BCIP Venture II-B. The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal.

F12 · ownership.nature: (Continued From Footnote 11) As a result, each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to all of the securities held by the Bain Capital Venture Entities. Each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal disclaims beneficial ownership of such securities except to the extent of its or his pecuniary interest therein.

SEC source: 0000899243-21-021452 · doc4.xml · nonDerivative · entry 3

BAIN CAPITAL VENTURE INVESTORS, LLC · CIK 0001309469 · 10% owner

Bain Capital Venture Coinvestment Fund II, L.P. · CIK 0001756820 · 10% owner

BCV 2019-MD Coinvestment II, L.P. · CIK 0001758683 · 10% owner

Bain Capital Venture Coinvestment II Investors, LLC · CIK 0001862142 · 10% owner

BAIN CAPITAL VENTURE FUND 2014, L.P. · CIK 0001609330 · 10% owner

Bain Capital Venture Partners 2014, L.P. · CIK 0001767194 · 10% owner

Bain Capital Venture Fund 2016, L.P. · CIK 0001678394 · 10% owner

Bain Capital Venture Partners 2016, L.P. · CIK 0001862138 · 10% owner

BCIP Venture Associates · CIK 0001408649 · 10% owner

BCIP VENTURE ASSOCIATES-B · CIK 0001408676 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 8,574,114

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F3 · ownership.nature: In the Conversion, the 488,607 shares of Series A Preferred Stock, 915,603 shares of Series B Preferred Stock and 6,819,693 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014") automatically converted into an aggregate of 8,223,903 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2014 held 13,573,035 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 13,573,035 shares of the Issuer's Voting Common Stock in the Reclassification.

F4 · ownership.nature: In the Conversion, the 11,376 shares of Series A Preferred Stock, 245,901 shares of Series B Preferred Stock and 64,047 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016") automatically converted into an aggregate of 321,324 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2016 held 665,271 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 665,271 shares of the Issuer's Voting Common Stock in the Reclassification.

F5 · ownership.nature: In the Conversion, the 49,803 shares of Series A Preferred Stock, 93,345 shares of Series B Preferred Stock and 695,265 shares of Series C Preferred Stock held by BCIP Venture Associates ("BCIP Venture") automatically converted into an aggregate of 838,413 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture held 1,383,753 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 1,383,753 shares of the Issuer's Voting Common Stock in the Reclassification.

F6 · ownership.nature: In the Conversion, the 3,357 shares of Series A Preferred Stock, 6,279 shares of Series B Preferred Stock and 46,773 shares of Series C Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B") automatically converted into an aggregate of 56,409 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture-B held 93,096 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 93,096 shares of the Issuer's Voting Common Stock in the Reclassification.

F7 · ownership.nature: In the Conversion, the 1,137 shares of Series A Preferred Stock, 47,454 shares of Series B Preferred Stock, 15,030 shares of Series B-1 Preferred Stock and 12,504 shares of Series C Preferred Stock held by BCIP Venture Associates II, LP ("BCIP Venture II") automatically converted into an aggregate of 76,125 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II held 110,520 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 110,520 shares of the Issuer's Voting Common Stock in the Reclassification.

F8 · ownership.nature: In the Conversion, the 96 shares of Series A Preferred Stock, 3,402 shares of Series B Preferred Stock, 888 shares of Series B-1 Preferred Stock and 894 shares of Series C Preferred Stock held by BCIP Venture Associates II-B, LP ("BCIP Venture II-B") automatically converted into an aggregate of 5,280 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II-B held 8,145 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 8,145 shares of the Issuer's Voting Common Stock in the Reclassification.

F9 · ownership.nature: In the Conversion, the 220,146 shares of Series B Preferred Stock, 144,729 shares of Series B-1 Preferred Stock and 58,725 shares of Series C Preferred Stock held by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") automatically converted into an aggregate of 423,600 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Coinvestment Fund II held 423,600 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 423,600 shares of the Issuer's Voting Common Stock in the Reclassification.

F10 · ownership.nature: In the Conversion, the 8,805 shares of Series B Preferred Stock, 5,790 shares of Series B-1 Preferred Stock and 2,349 shares of Series C Preferred Stock held by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and, together with Venture Fund 2014, Venture Fund 2016, BCIP Venture, BCIP Venture-B, BCIP Venture II, BCIP Venture II-B and Venture Coinvestment Fund II, the "Bain Capital Venture Entities") automatically converted into an aggregate of 16,944 shares of the Issuer's Class A Common Stock. Following the Conversion, 2019-MD Coinvestment II held 16,944 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 16,944 shares of the Issuer's Voting Common Stock in the Reclassification.

F11 · ownership.nature: Bain Capital Venture Investors, LLC ("BCVI") is (i) the general partner of Bain Capital Venture Partners 2014, L.P. ("Venture Partners 2014"), which is the general partner of Venture Fund 2014, (ii) the general partner of Bain Capital Venture Partners 2016, L.P. ("Venture Partners 2016"), which is the general partner of Venture Fund 2016 and (iii) the manager of Bain Capital Venture Coinvestment II Investors, LLC ("Venture Coinvestment II Investors"), which is the general partner of each of Venture Coinvestment Fund II and 2019-MD Coinvestment II. Boylston Coinvestors, LLC is (i) the managing partner of each of BCIP Venture and BCIP Venture-B and (ii) the general partner of each of BCIP Venture II and BCIP Venture II-B. The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal.

F12 · ownership.nature: (Continued From Footnote 11) As a result, each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to all of the securities held by the Bain Capital Venture Entities. Each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal disclaims beneficial ownership of such securities except to the extent of its or his pecuniary interest therein.

SEC source: 0000899243-21-021452 · doc4.xml · nonDerivative · entry 2

BAIN CAPITAL VENTURE INVESTORS, LLC · CIK 0001309469 · 10% owner

Bain Capital Venture Coinvestment Fund II, L.P. · CIK 0001756820 · 10% owner

BCV 2019-MD Coinvestment II, L.P. · CIK 0001758683 · 10% owner

Bain Capital Venture Coinvestment II Investors, LLC · CIK 0001862142 · 10% owner

BAIN CAPITAL VENTURE FUND 2014, L.P. · CIK 0001609330 · 10% owner

Bain Capital Venture Partners 2014, L.P. · CIK 0001767194 · 10% owner

Bain Capital Venture Fund 2016, L.P. · CIK 0001678394 · 10% owner

Bain Capital Venture Partners 2016, L.P. · CIK 0001862138 · 10% owner

BCIP Venture Associates · CIK 0001408649 · 10% owner

BCIP VENTURE ASSOCIATES-B · CIK 0001408676 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 8,407,677

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F3 · ownership.nature: In the Conversion, the 488,607 shares of Series A Preferred Stock, 915,603 shares of Series B Preferred Stock and 6,819,693 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014") automatically converted into an aggregate of 8,223,903 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2014 held 13,573,035 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 13,573,035 shares of the Issuer's Voting Common Stock in the Reclassification.

F4 · ownership.nature: In the Conversion, the 11,376 shares of Series A Preferred Stock, 245,901 shares of Series B Preferred Stock and 64,047 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016") automatically converted into an aggregate of 321,324 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2016 held 665,271 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 665,271 shares of the Issuer's Voting Common Stock in the Reclassification.

F5 · ownership.nature: In the Conversion, the 49,803 shares of Series A Preferred Stock, 93,345 shares of Series B Preferred Stock and 695,265 shares of Series C Preferred Stock held by BCIP Venture Associates ("BCIP Venture") automatically converted into an aggregate of 838,413 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture held 1,383,753 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 1,383,753 shares of the Issuer's Voting Common Stock in the Reclassification.

F6 · ownership.nature: In the Conversion, the 3,357 shares of Series A Preferred Stock, 6,279 shares of Series B Preferred Stock and 46,773 shares of Series C Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B") automatically converted into an aggregate of 56,409 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture-B held 93,096 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 93,096 shares of the Issuer's Voting Common Stock in the Reclassification.

F7 · ownership.nature: In the Conversion, the 1,137 shares of Series A Preferred Stock, 47,454 shares of Series B Preferred Stock, 15,030 shares of Series B-1 Preferred Stock and 12,504 shares of Series C Preferred Stock held by BCIP Venture Associates II, LP ("BCIP Venture II") automatically converted into an aggregate of 76,125 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II held 110,520 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 110,520 shares of the Issuer's Voting Common Stock in the Reclassification.

F8 · ownership.nature: In the Conversion, the 96 shares of Series A Preferred Stock, 3,402 shares of Series B Preferred Stock, 888 shares of Series B-1 Preferred Stock and 894 shares of Series C Preferred Stock held by BCIP Venture Associates II-B, LP ("BCIP Venture II-B") automatically converted into an aggregate of 5,280 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II-B held 8,145 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 8,145 shares of the Issuer's Voting Common Stock in the Reclassification.

F9 · ownership.nature: In the Conversion, the 220,146 shares of Series B Preferred Stock, 144,729 shares of Series B-1 Preferred Stock and 58,725 shares of Series C Preferred Stock held by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") automatically converted into an aggregate of 423,600 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Coinvestment Fund II held 423,600 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 423,600 shares of the Issuer's Voting Common Stock in the Reclassification.

F10 · ownership.nature: In the Conversion, the 8,805 shares of Series B Preferred Stock, 5,790 shares of Series B-1 Preferred Stock and 2,349 shares of Series C Preferred Stock held by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and, together with Venture Fund 2014, Venture Fund 2016, BCIP Venture, BCIP Venture-B, BCIP Venture II, BCIP Venture II-B and Venture Coinvestment Fund II, the "Bain Capital Venture Entities") automatically converted into an aggregate of 16,944 shares of the Issuer's Class A Common Stock. Following the Conversion, 2019-MD Coinvestment II held 16,944 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 16,944 shares of the Issuer's Voting Common Stock in the Reclassification.

F11 · ownership.nature: Bain Capital Venture Investors, LLC ("BCVI") is (i) the general partner of Bain Capital Venture Partners 2014, L.P. ("Venture Partners 2014"), which is the general partner of Venture Fund 2014, (ii) the general partner of Bain Capital Venture Partners 2016, L.P. ("Venture Partners 2016"), which is the general partner of Venture Fund 2016 and (iii) the manager of Bain Capital Venture Coinvestment II Investors, LLC ("Venture Coinvestment II Investors"), which is the general partner of each of Venture Coinvestment Fund II and 2019-MD Coinvestment II. Boylston Coinvestors, LLC is (i) the managing partner of each of BCIP Venture and BCIP Venture-B and (ii) the general partner of each of BCIP Venture II and BCIP Venture II-B. The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal.

F12 · ownership.nature: (Continued From Footnote 11) As a result, each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to all of the securities held by the Bain Capital Venture Entities. Each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal disclaims beneficial ownership of such securities except to the extent of its or his pecuniary interest therein.

SEC source: 0000899243-21-021452 · doc4.xml · nonDerivative · entry 1

BAIN CAPITAL VENTURE INVESTORS, LLC · CIK 0001309469 · 10% owner

Bain Capital Venture Coinvestment Fund II, L.P. · CIK 0001756820 · 10% owner

BCV 2019-MD Coinvestment II, L.P. · CIK 0001758683 · 10% owner

Bain Capital Venture Coinvestment II Investors, LLC · CIK 0001862142 · 10% owner

BAIN CAPITAL VENTURE FUND 2014, L.P. · CIK 0001609330 · 10% owner

Bain Capital Venture Partners 2014, L.P. · CIK 0001767194 · 10% owner

Bain Capital Venture Fund 2016, L.P. · CIK 0001678394 · 10% owner

Bain Capital Venture Partners 2016, L.P. · CIK 0001862138 · 10% owner

BCIP Venture Associates · CIK 0001408649 · 10% owner

BCIP VENTURE ASSOCIATES-B · CIK 0001408676 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 6,866,742

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F3 · ownership.nature: In the Conversion, the 488,607 shares of Series A Preferred Stock, 915,603 shares of Series B Preferred Stock and 6,819,693 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014") automatically converted into an aggregate of 8,223,903 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2014 held 13,573,035 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 13,573,035 shares of the Issuer's Voting Common Stock in the Reclassification.

F4 · ownership.nature: In the Conversion, the 11,376 shares of Series A Preferred Stock, 245,901 shares of Series B Preferred Stock and 64,047 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016") automatically converted into an aggregate of 321,324 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2016 held 665,271 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 665,271 shares of the Issuer's Voting Common Stock in the Reclassification.

F5 · ownership.nature: In the Conversion, the 49,803 shares of Series A Preferred Stock, 93,345 shares of Series B Preferred Stock and 695,265 shares of Series C Preferred Stock held by BCIP Venture Associates ("BCIP Venture") automatically converted into an aggregate of 838,413 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture held 1,383,753 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 1,383,753 shares of the Issuer's Voting Common Stock in the Reclassification.

F6 · ownership.nature: In the Conversion, the 3,357 shares of Series A Preferred Stock, 6,279 shares of Series B Preferred Stock and 46,773 shares of Series C Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B") automatically converted into an aggregate of 56,409 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture-B held 93,096 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 93,096 shares of the Issuer's Voting Common Stock in the Reclassification.

F7 · ownership.nature: In the Conversion, the 1,137 shares of Series A Preferred Stock, 47,454 shares of Series B Preferred Stock, 15,030 shares of Series B-1 Preferred Stock and 12,504 shares of Series C Preferred Stock held by BCIP Venture Associates II, LP ("BCIP Venture II") automatically converted into an aggregate of 76,125 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II held 110,520 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 110,520 shares of the Issuer's Voting Common Stock in the Reclassification.

F8 · ownership.nature: In the Conversion, the 96 shares of Series A Preferred Stock, 3,402 shares of Series B Preferred Stock, 888 shares of Series B-1 Preferred Stock and 894 shares of Series C Preferred Stock held by BCIP Venture Associates II-B, LP ("BCIP Venture II-B") automatically converted into an aggregate of 5,280 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II-B held 8,145 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 8,145 shares of the Issuer's Voting Common Stock in the Reclassification.

F9 · ownership.nature: In the Conversion, the 220,146 shares of Series B Preferred Stock, 144,729 shares of Series B-1 Preferred Stock and 58,725 shares of Series C Preferred Stock held by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") automatically converted into an aggregate of 423,600 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Coinvestment Fund II held 423,600 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 423,600 shares of the Issuer's Voting Common Stock in the Reclassification.

F10 · ownership.nature: In the Conversion, the 8,805 shares of Series B Preferred Stock, 5,790 shares of Series B-1 Preferred Stock and 2,349 shares of Series C Preferred Stock held by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and, together with Venture Fund 2014, Venture Fund 2016, BCIP Venture, BCIP Venture-B, BCIP Venture II, BCIP Venture II-B and Venture Coinvestment Fund II, the "Bain Capital Venture Entities") automatically converted into an aggregate of 16,944 shares of the Issuer's Class A Common Stock. Following the Conversion, 2019-MD Coinvestment II held 16,944 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 16,944 shares of the Issuer's Voting Common Stock in the Reclassification.

F11 · ownership.nature: Bain Capital Venture Investors, LLC ("BCVI") is (i) the general partner of Bain Capital Venture Partners 2014, L.P. ("Venture Partners 2014"), which is the general partner of Venture Fund 2014, (ii) the general partner of Bain Capital Venture Partners 2016, L.P. ("Venture Partners 2016"), which is the general partner of Venture Fund 2016 and (iii) the manager of Bain Capital Venture Coinvestment II Investors, LLC ("Venture Coinvestment II Investors"), which is the general partner of each of Venture Coinvestment Fund II and 2019-MD Coinvestment II. Boylston Coinvestors, LLC is (i) the managing partner of each of BCIP Venture and BCIP Venture-B and (ii) the general partner of each of BCIP Venture II and BCIP Venture II-B. The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal.

F12 · ownership.nature: (Continued From Footnote 11) As a result, each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to all of the securities held by the Bain Capital Venture Entities. Each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal disclaims beneficial ownership of such securities except to the extent of its or his pecuniary interest therein.

SEC source: 0000899243-21-021456 · doc4.xml · derivative · entry 10

BAIN CAPITAL VENTURE INVESTORS, LLC · CIK 0001309469 · 10% owner

BCIP Venture Associates II, L.P. · CIK 0001859026 · 10% owner

BCIP Venture Associates II-B, LP · CIK 0001859012 · 10% owner

Salem Enrique T · CIK 0001295402 · 10% owner

Agarwal Ajay · CIK 0001708763 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 0

Underlying: Class A Common Stock · 7,700,250 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F1 · price: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F1 · derivative.exercise_date: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F1 · derivative.expiration_date: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F3 · ownership.nature: In the Conversion, the 488,607 shares of Series A Preferred Stock, 915,603 shares of Series B Preferred Stock and 6,819,693 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014") automatically converted into an aggregate of 8,223,903 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2014 held 13,573,035 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 13,573,035 shares of the Issuer's Voting Common Stock in the Reclassification.

F4 · ownership.nature: In the Conversion, the 11,376 shares of Series A Preferred Stock, 245,901 shares of Series B Preferred Stock and 64,047 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016") automatically converted into an aggregate of 321,324 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2016 held 665,271 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 665,271 shares of the Issuer's Voting Common Stock in the Reclassification.

F5 · ownership.nature: In the Conversion, the 49,803 shares of Series A Preferred Stock, 93,345 shares of Series B Preferred Stock and 695,265 shares of Series C Preferred Stock held by BCIP Venture Associates ("BCIP Venture") automatically converted into an aggregate of 838,413 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture held 1,383,753 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 1,383,753 shares of the Issuer's Voting Common Stock in the Reclassification.

F6 · ownership.nature: In the Conversion, the 3,357 shares of Series A Preferred Stock, 6,279 shares of Series B Preferred Stock and 46,773 shares of Series C Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B") automatically converted into an aggregate of 56,409 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture-B held 93,096 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 93,096 shares of the Issuer's Voting Common Stock in the Reclassification.

F7 · ownership.nature: In the Conversion, the 1,137 shares of Series A Preferred Stock, 47,454 shares of Series B Preferred Stock, 15,030 shares of Series B-1 Preferred Stock and 12,504 shares of Series C Preferred Stock held by BCIP Venture Associates II, LP ("BCIP Venture II") automatically converted into an aggregate of 76,125 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II held 110,520 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 110,520 shares of the Issuer's Voting Common Stock in the Reclassification.

F8 · ownership.nature: In the Conversion, the 96 shares of Series A Preferred Stock, 3,402 shares of Series B Preferred Stock, 888 shares of Series B-1 Preferred Stock and 894 shares of Series C Preferred Stock held by BCIP Venture Associates II-B, LP ("BCIP Venture II-B") automatically converted into an aggregate of 5,280 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II-B held 8,145 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 8,145 shares of the Issuer's Voting Common Stock in the Reclassification.

F9 · ownership.nature: In the Conversion, the 220,146 shares of Series B Preferred Stock, 144,729 shares of Series B-1 Preferred Stock and 58,725 shares of Series C Preferred Stock held by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") automatically converted into an aggregate of 423,600 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Coinvestment Fund II held 423,600 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 423,600 shares of the Issuer's Voting Common Stock in the Reclassification.

F10 · ownership.nature: In the Conversion, the 8,805 shares of Series B Preferred Stock, 5,790 shares of Series B-1 Preferred Stock and 2,349 shares of Series C Preferred Stock held by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and, together with Venture Fund 2014, Venture Fund 2016, BCIP Venture, BCIP Venture-B, BCIP Venture II, BCIP Venture II-B and Venture Coinvestment Fund II, the "Bain Capital Venture Entities") automatically converted into an aggregate of 16,944 shares of the Issuer's Class A Common Stock. Following the Conversion, 2019-MD Coinvestment II held 16,944 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 16,944 shares of the Issuer's Voting Common Stock in the Reclassification.

F11 · ownership.nature: Bain Capital Venture Investors, LLC ("BCVI") is (i) the general partner of Bain Capital Venture Partners 2014, L.P. ("Venture Partners 2014"), which is the general partner of Venture Fund 2014, (ii) the general partner of Bain Capital Venture Partners 2016, L.P. ("Venture Partners 2016"), which is the general partner of Venture Fund 2016 and (iii) the manager of Bain Capital Venture Coinvestment II Investors, LLC ("Venture Coinvestment II Investors"), which is the general partner of each of Venture Coinvestment Fund II and 2019-MD Coinvestment II. Boylston Coinvestors, LLC is (i) the managing partner of each of BCIP Venture and BCIP Venture-B and (ii) the general partner of each of BCIP Venture II and BCIP Venture II-B. The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal.

F12 · ownership.nature: (Continued From Footnote 11) As a result, each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to all of the securities held by the Bain Capital Venture Entities. Each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal disclaims beneficial ownership of such securities except to the extent of its or his pecuniary interest therein.

SEC source: 0000899243-21-021456 · doc4.xml · derivative · entry 9

BAIN CAPITAL VENTURE INVESTORS, LLC · CIK 0001309469 · 10% owner

BCIP Venture Associates II, L.P. · CIK 0001859026 · 10% owner

BCIP Venture Associates II-B, LP · CIK 0001859012 · 10% owner

Salem Enrique T · CIK 0001295402 · 10% owner

Agarwal Ajay · CIK 0001708763 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 0

Underlying: Class A Common Stock · 166,437 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F1 · price: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F1 · derivative.exercise_date: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F1 · derivative.expiration_date: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F3 · ownership.nature: In the Conversion, the 488,607 shares of Series A Preferred Stock, 915,603 shares of Series B Preferred Stock and 6,819,693 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014") automatically converted into an aggregate of 8,223,903 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2014 held 13,573,035 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 13,573,035 shares of the Issuer's Voting Common Stock in the Reclassification.

F4 · ownership.nature: In the Conversion, the 11,376 shares of Series A Preferred Stock, 245,901 shares of Series B Preferred Stock and 64,047 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016") automatically converted into an aggregate of 321,324 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2016 held 665,271 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 665,271 shares of the Issuer's Voting Common Stock in the Reclassification.

F5 · ownership.nature: In the Conversion, the 49,803 shares of Series A Preferred Stock, 93,345 shares of Series B Preferred Stock and 695,265 shares of Series C Preferred Stock held by BCIP Venture Associates ("BCIP Venture") automatically converted into an aggregate of 838,413 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture held 1,383,753 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 1,383,753 shares of the Issuer's Voting Common Stock in the Reclassification.

F6 · ownership.nature: In the Conversion, the 3,357 shares of Series A Preferred Stock, 6,279 shares of Series B Preferred Stock and 46,773 shares of Series C Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B") automatically converted into an aggregate of 56,409 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture-B held 93,096 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 93,096 shares of the Issuer's Voting Common Stock in the Reclassification.

F7 · ownership.nature: In the Conversion, the 1,137 shares of Series A Preferred Stock, 47,454 shares of Series B Preferred Stock, 15,030 shares of Series B-1 Preferred Stock and 12,504 shares of Series C Preferred Stock held by BCIP Venture Associates II, LP ("BCIP Venture II") automatically converted into an aggregate of 76,125 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II held 110,520 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 110,520 shares of the Issuer's Voting Common Stock in the Reclassification.

F8 · ownership.nature: In the Conversion, the 96 shares of Series A Preferred Stock, 3,402 shares of Series B Preferred Stock, 888 shares of Series B-1 Preferred Stock and 894 shares of Series C Preferred Stock held by BCIP Venture Associates II-B, LP ("BCIP Venture II-B") automatically converted into an aggregate of 5,280 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II-B held 8,145 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 8,145 shares of the Issuer's Voting Common Stock in the Reclassification.

F9 · ownership.nature: In the Conversion, the 220,146 shares of Series B Preferred Stock, 144,729 shares of Series B-1 Preferred Stock and 58,725 shares of Series C Preferred Stock held by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") automatically converted into an aggregate of 423,600 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Coinvestment Fund II held 423,600 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 423,600 shares of the Issuer's Voting Common Stock in the Reclassification.

F10 · ownership.nature: In the Conversion, the 8,805 shares of Series B Preferred Stock, 5,790 shares of Series B-1 Preferred Stock and 2,349 shares of Series C Preferred Stock held by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and, together with Venture Fund 2014, Venture Fund 2016, BCIP Venture, BCIP Venture-B, BCIP Venture II, BCIP Venture II-B and Venture Coinvestment Fund II, the "Bain Capital Venture Entities") automatically converted into an aggregate of 16,944 shares of the Issuer's Class A Common Stock. Following the Conversion, 2019-MD Coinvestment II held 16,944 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 16,944 shares of the Issuer's Voting Common Stock in the Reclassification.

F11 · ownership.nature: Bain Capital Venture Investors, LLC ("BCVI") is (i) the general partner of Bain Capital Venture Partners 2014, L.P. ("Venture Partners 2014"), which is the general partner of Venture Fund 2014, (ii) the general partner of Bain Capital Venture Partners 2016, L.P. ("Venture Partners 2016"), which is the general partner of Venture Fund 2016 and (iii) the manager of Bain Capital Venture Coinvestment II Investors, LLC ("Venture Coinvestment II Investors"), which is the general partner of each of Venture Coinvestment Fund II and 2019-MD Coinvestment II. Boylston Coinvestors, LLC is (i) the managing partner of each of BCIP Venture and BCIP Venture-B and (ii) the general partner of each of BCIP Venture II and BCIP Venture II-B. The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal.

F12 · ownership.nature: (Continued From Footnote 11) As a result, each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to all of the securities held by the Bain Capital Venture Entities. Each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal disclaims beneficial ownership of such securities except to the extent of its or his pecuniary interest therein.

SEC source: 0000899243-21-021456 · doc4.xml · derivative · entry 8

BAIN CAPITAL VENTURE INVESTORS, LLC · CIK 0001309469 · 10% owner

BCIP Venture Associates II, L.P. · CIK 0001859026 · 10% owner

BCIP Venture Associates II-B, LP · CIK 0001859012 · 10% owner

Salem Enrique T · CIK 0001295402 · 10% owner

Agarwal Ajay · CIK 0001708763 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 0

Underlying: Class A Common Stock · 1,540,935 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F1 · price: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F1 · derivative.exercise_date: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F1 · derivative.expiration_date: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F3 · ownership.nature: In the Conversion, the 488,607 shares of Series A Preferred Stock, 915,603 shares of Series B Preferred Stock and 6,819,693 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014") automatically converted into an aggregate of 8,223,903 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2014 held 13,573,035 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 13,573,035 shares of the Issuer's Voting Common Stock in the Reclassification.

F4 · ownership.nature: In the Conversion, the 11,376 shares of Series A Preferred Stock, 245,901 shares of Series B Preferred Stock and 64,047 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016") automatically converted into an aggregate of 321,324 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2016 held 665,271 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 665,271 shares of the Issuer's Voting Common Stock in the Reclassification.

F5 · ownership.nature: In the Conversion, the 49,803 shares of Series A Preferred Stock, 93,345 shares of Series B Preferred Stock and 695,265 shares of Series C Preferred Stock held by BCIP Venture Associates ("BCIP Venture") automatically converted into an aggregate of 838,413 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture held 1,383,753 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 1,383,753 shares of the Issuer's Voting Common Stock in the Reclassification.

F6 · ownership.nature: In the Conversion, the 3,357 shares of Series A Preferred Stock, 6,279 shares of Series B Preferred Stock and 46,773 shares of Series C Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B") automatically converted into an aggregate of 56,409 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture-B held 93,096 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 93,096 shares of the Issuer's Voting Common Stock in the Reclassification.

F7 · ownership.nature: In the Conversion, the 1,137 shares of Series A Preferred Stock, 47,454 shares of Series B Preferred Stock, 15,030 shares of Series B-1 Preferred Stock and 12,504 shares of Series C Preferred Stock held by BCIP Venture Associates II, LP ("BCIP Venture II") automatically converted into an aggregate of 76,125 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II held 110,520 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 110,520 shares of the Issuer's Voting Common Stock in the Reclassification.

F8 · ownership.nature: In the Conversion, the 96 shares of Series A Preferred Stock, 3,402 shares of Series B Preferred Stock, 888 shares of Series B-1 Preferred Stock and 894 shares of Series C Preferred Stock held by BCIP Venture Associates II-B, LP ("BCIP Venture II-B") automatically converted into an aggregate of 5,280 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II-B held 8,145 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 8,145 shares of the Issuer's Voting Common Stock in the Reclassification.

F9 · ownership.nature: In the Conversion, the 220,146 shares of Series B Preferred Stock, 144,729 shares of Series B-1 Preferred Stock and 58,725 shares of Series C Preferred Stock held by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") automatically converted into an aggregate of 423,600 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Coinvestment Fund II held 423,600 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 423,600 shares of the Issuer's Voting Common Stock in the Reclassification.

F10 · ownership.nature: In the Conversion, the 8,805 shares of Series B Preferred Stock, 5,790 shares of Series B-1 Preferred Stock and 2,349 shares of Series C Preferred Stock held by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and, together with Venture Fund 2014, Venture Fund 2016, BCIP Venture, BCIP Venture-B, BCIP Venture II, BCIP Venture II-B and Venture Coinvestment Fund II, the "Bain Capital Venture Entities") automatically converted into an aggregate of 16,944 shares of the Issuer's Class A Common Stock. Following the Conversion, 2019-MD Coinvestment II held 16,944 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 16,944 shares of the Issuer's Voting Common Stock in the Reclassification.

F11 · ownership.nature: Bain Capital Venture Investors, LLC ("BCVI") is (i) the general partner of Bain Capital Venture Partners 2014, L.P. ("Venture Partners 2014"), which is the general partner of Venture Fund 2014, (ii) the general partner of Bain Capital Venture Partners 2016, L.P. ("Venture Partners 2016"), which is the general partner of Venture Fund 2016 and (iii) the manager of Bain Capital Venture Coinvestment II Investors, LLC ("Venture Coinvestment II Investors"), which is the general partner of each of Venture Coinvestment Fund II and 2019-MD Coinvestment II. Boylston Coinvestors, LLC is (i) the managing partner of each of BCIP Venture and BCIP Venture-B and (ii) the general partner of each of BCIP Venture II and BCIP Venture II-B. The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal.

F12 · ownership.nature: (Continued From Footnote 11) As a result, each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to all of the securities held by the Bain Capital Venture Entities. Each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal disclaims beneficial ownership of such securities except to the extent of its or his pecuniary interest therein.

SEC source: 0000899243-21-021456 · doc4.xml · derivative · entry 7

BAIN CAPITAL VENTURE INVESTORS, LLC · CIK 0001309469 · 10% owner

BCIP Venture Associates II, L.P. · CIK 0001859026 · 10% owner

BCIP Venture Associates II-B, LP · CIK 0001859012 · 10% owner

Salem Enrique T · CIK 0001295402 · 10% owner

Agarwal Ajay · CIK 0001708763 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 0

Underlying: Class A Common Stock · 554,376 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F1 · price: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F1 · derivative.exercise_date: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F1 · derivative.expiration_date: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F3 · ownership.nature: In the Conversion, the 488,607 shares of Series A Preferred Stock, 915,603 shares of Series B Preferred Stock and 6,819,693 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014") automatically converted into an aggregate of 8,223,903 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2014 held 13,573,035 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 13,573,035 shares of the Issuer's Voting Common Stock in the Reclassification.

F4 · ownership.nature: In the Conversion, the 11,376 shares of Series A Preferred Stock, 245,901 shares of Series B Preferred Stock and 64,047 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016") automatically converted into an aggregate of 321,324 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2016 held 665,271 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 665,271 shares of the Issuer's Voting Common Stock in the Reclassification.

F5 · ownership.nature: In the Conversion, the 49,803 shares of Series A Preferred Stock, 93,345 shares of Series B Preferred Stock and 695,265 shares of Series C Preferred Stock held by BCIP Venture Associates ("BCIP Venture") automatically converted into an aggregate of 838,413 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture held 1,383,753 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 1,383,753 shares of the Issuer's Voting Common Stock in the Reclassification.

F6 · ownership.nature: In the Conversion, the 3,357 shares of Series A Preferred Stock, 6,279 shares of Series B Preferred Stock and 46,773 shares of Series C Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B") automatically converted into an aggregate of 56,409 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture-B held 93,096 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 93,096 shares of the Issuer's Voting Common Stock in the Reclassification.

F7 · ownership.nature: In the Conversion, the 1,137 shares of Series A Preferred Stock, 47,454 shares of Series B Preferred Stock, 15,030 shares of Series B-1 Preferred Stock and 12,504 shares of Series C Preferred Stock held by BCIP Venture Associates II, LP ("BCIP Venture II") automatically converted into an aggregate of 76,125 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II held 110,520 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 110,520 shares of the Issuer's Voting Common Stock in the Reclassification.

F8 · ownership.nature: In the Conversion, the 96 shares of Series A Preferred Stock, 3,402 shares of Series B Preferred Stock, 888 shares of Series B-1 Preferred Stock and 894 shares of Series C Preferred Stock held by BCIP Venture Associates II-B, LP ("BCIP Venture II-B") automatically converted into an aggregate of 5,280 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II-B held 8,145 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 8,145 shares of the Issuer's Voting Common Stock in the Reclassification.

F9 · ownership.nature: In the Conversion, the 220,146 shares of Series B Preferred Stock, 144,729 shares of Series B-1 Preferred Stock and 58,725 shares of Series C Preferred Stock held by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") automatically converted into an aggregate of 423,600 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Coinvestment Fund II held 423,600 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 423,600 shares of the Issuer's Voting Common Stock in the Reclassification.

F10 · ownership.nature: In the Conversion, the 8,805 shares of Series B Preferred Stock, 5,790 shares of Series B-1 Preferred Stock and 2,349 shares of Series C Preferred Stock held by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and, together with Venture Fund 2014, Venture Fund 2016, BCIP Venture, BCIP Venture-B, BCIP Venture II, BCIP Venture II-B and Venture Coinvestment Fund II, the "Bain Capital Venture Entities") automatically converted into an aggregate of 16,944 shares of the Issuer's Class A Common Stock. Following the Conversion, 2019-MD Coinvestment II held 16,944 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 16,944 shares of the Issuer's Voting Common Stock in the Reclassification.

F11 · ownership.nature: Bain Capital Venture Investors, LLC ("BCVI") is (i) the general partner of Bain Capital Venture Partners 2014, L.P. ("Venture Partners 2014"), which is the general partner of Venture Fund 2014, (ii) the general partner of Bain Capital Venture Partners 2016, L.P. ("Venture Partners 2016"), which is the general partner of Venture Fund 2016 and (iii) the manager of Bain Capital Venture Coinvestment II Investors, LLC ("Venture Coinvestment II Investors"), which is the general partner of each of Venture Coinvestment Fund II and 2019-MD Coinvestment II. Boylston Coinvestors, LLC is (i) the managing partner of each of BCIP Venture and BCIP Venture-B and (ii) the general partner of each of BCIP Venture II and BCIP Venture II-B. The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal.

F12 · ownership.nature: (Continued From Footnote 11) As a result, each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to all of the securities held by the Bain Capital Venture Entities. Each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal disclaims beneficial ownership of such securities except to the extent of its or his pecuniary interest therein.

SEC source: 0000899243-21-021456 · doc4.xml · nonDerivative · entry 6

BAIN CAPITAL VENTURE INVESTORS, LLC · CIK 0001309469 · 10% owner

BCIP Venture Associates II, L.P. · CIK 0001859026 · 10% owner

BCIP Venture Associates II-B, LP · CIK 0001859012 · 10% owner

Salem Enrique T · CIK 0001295402 · 10% owner

Agarwal Ajay · CIK 0001708763 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 16,274,364

F2 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of the Issuer's Class A Common Stock was reclassified into one share of the Issuer's Voting Common Stock following the Conversion and immediately prior to the closing of the Issuer's initial public offering (the "Reclassification").

F2 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of the Issuer's Class A Common Stock was reclassified into one share of the Issuer's Voting Common Stock following the Conversion and immediately prior to the closing of the Issuer's initial public offering (the "Reclassification").

F3 · ownership.nature: In the Conversion, the 488,607 shares of Series A Preferred Stock, 915,603 shares of Series B Preferred Stock and 6,819,693 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014") automatically converted into an aggregate of 8,223,903 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2014 held 13,573,035 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 13,573,035 shares of the Issuer's Voting Common Stock in the Reclassification.

F4 · ownership.nature: In the Conversion, the 11,376 shares of Series A Preferred Stock, 245,901 shares of Series B Preferred Stock and 64,047 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016") automatically converted into an aggregate of 321,324 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2016 held 665,271 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 665,271 shares of the Issuer's Voting Common Stock in the Reclassification.

F5 · ownership.nature: In the Conversion, the 49,803 shares of Series A Preferred Stock, 93,345 shares of Series B Preferred Stock and 695,265 shares of Series C Preferred Stock held by BCIP Venture Associates ("BCIP Venture") automatically converted into an aggregate of 838,413 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture held 1,383,753 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 1,383,753 shares of the Issuer's Voting Common Stock in the Reclassification.

F6 · ownership.nature: In the Conversion, the 3,357 shares of Series A Preferred Stock, 6,279 shares of Series B Preferred Stock and 46,773 shares of Series C Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B") automatically converted into an aggregate of 56,409 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture-B held 93,096 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 93,096 shares of the Issuer's Voting Common Stock in the Reclassification.

F7 · ownership.nature: In the Conversion, the 1,137 shares of Series A Preferred Stock, 47,454 shares of Series B Preferred Stock, 15,030 shares of Series B-1 Preferred Stock and 12,504 shares of Series C Preferred Stock held by BCIP Venture Associates II, LP ("BCIP Venture II") automatically converted into an aggregate of 76,125 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II held 110,520 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 110,520 shares of the Issuer's Voting Common Stock in the Reclassification.

F8 · ownership.nature: In the Conversion, the 96 shares of Series A Preferred Stock, 3,402 shares of Series B Preferred Stock, 888 shares of Series B-1 Preferred Stock and 894 shares of Series C Preferred Stock held by BCIP Venture Associates II-B, LP ("BCIP Venture II-B") automatically converted into an aggregate of 5,280 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II-B held 8,145 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 8,145 shares of the Issuer's Voting Common Stock in the Reclassification.

F9 · ownership.nature: In the Conversion, the 220,146 shares of Series B Preferred Stock, 144,729 shares of Series B-1 Preferred Stock and 58,725 shares of Series C Preferred Stock held by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") automatically converted into an aggregate of 423,600 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Coinvestment Fund II held 423,600 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 423,600 shares of the Issuer's Voting Common Stock in the Reclassification.

F10 · ownership.nature: In the Conversion, the 8,805 shares of Series B Preferred Stock, 5,790 shares of Series B-1 Preferred Stock and 2,349 shares of Series C Preferred Stock held by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and, together with Venture Fund 2014, Venture Fund 2016, BCIP Venture, BCIP Venture-B, BCIP Venture II, BCIP Venture II-B and Venture Coinvestment Fund II, the "Bain Capital Venture Entities") automatically converted into an aggregate of 16,944 shares of the Issuer's Class A Common Stock. Following the Conversion, 2019-MD Coinvestment II held 16,944 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 16,944 shares of the Issuer's Voting Common Stock in the Reclassification.

F11 · ownership.nature: Bain Capital Venture Investors, LLC ("BCVI") is (i) the general partner of Bain Capital Venture Partners 2014, L.P. ("Venture Partners 2014"), which is the general partner of Venture Fund 2014, (ii) the general partner of Bain Capital Venture Partners 2016, L.P. ("Venture Partners 2016"), which is the general partner of Venture Fund 2016 and (iii) the manager of Bain Capital Venture Coinvestment II Investors, LLC ("Venture Coinvestment II Investors"), which is the general partner of each of Venture Coinvestment Fund II and 2019-MD Coinvestment II. Boylston Coinvestors, LLC is (i) the managing partner of each of BCIP Venture and BCIP Venture-B and (ii) the general partner of each of BCIP Venture II and BCIP Venture II-B. The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal.

F12 · ownership.nature: (Continued From Footnote 11) As a result, each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to all of the securities held by the Bain Capital Venture Entities. Each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal disclaims beneficial ownership of such securities except to the extent of its or his pecuniary interest therein.

SEC source: 0000899243-21-021456 · doc4.xml · nonDerivative · entry 5

BAIN CAPITAL VENTURE INVESTORS, LLC · CIK 0001309469 · 10% owner

BCIP Venture Associates II, L.P. · CIK 0001859026 · 10% owner

BCIP Venture Associates II-B, LP · CIK 0001859012 · 10% owner

Salem Enrique T · CIK 0001295402 · 10% owner

Agarwal Ajay · CIK 0001708763 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 0

F2 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of the Issuer's Class A Common Stock was reclassified into one share of the Issuer's Voting Common Stock following the Conversion and immediately prior to the closing of the Issuer's initial public offering (the "Reclassification").

F2 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of the Issuer's Class A Common Stock was reclassified into one share of the Issuer's Voting Common Stock following the Conversion and immediately prior to the closing of the Issuer's initial public offering (the "Reclassification").

F3 · ownership.nature: In the Conversion, the 488,607 shares of Series A Preferred Stock, 915,603 shares of Series B Preferred Stock and 6,819,693 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014") automatically converted into an aggregate of 8,223,903 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2014 held 13,573,035 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 13,573,035 shares of the Issuer's Voting Common Stock in the Reclassification.

F4 · ownership.nature: In the Conversion, the 11,376 shares of Series A Preferred Stock, 245,901 shares of Series B Preferred Stock and 64,047 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016") automatically converted into an aggregate of 321,324 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2016 held 665,271 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 665,271 shares of the Issuer's Voting Common Stock in the Reclassification.

F5 · ownership.nature: In the Conversion, the 49,803 shares of Series A Preferred Stock, 93,345 shares of Series B Preferred Stock and 695,265 shares of Series C Preferred Stock held by BCIP Venture Associates ("BCIP Venture") automatically converted into an aggregate of 838,413 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture held 1,383,753 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 1,383,753 shares of the Issuer's Voting Common Stock in the Reclassification.

F6 · ownership.nature: In the Conversion, the 3,357 shares of Series A Preferred Stock, 6,279 shares of Series B Preferred Stock and 46,773 shares of Series C Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B") automatically converted into an aggregate of 56,409 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture-B held 93,096 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 93,096 shares of the Issuer's Voting Common Stock in the Reclassification.

F7 · ownership.nature: In the Conversion, the 1,137 shares of Series A Preferred Stock, 47,454 shares of Series B Preferred Stock, 15,030 shares of Series B-1 Preferred Stock and 12,504 shares of Series C Preferred Stock held by BCIP Venture Associates II, LP ("BCIP Venture II") automatically converted into an aggregate of 76,125 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II held 110,520 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 110,520 shares of the Issuer's Voting Common Stock in the Reclassification.

F8 · ownership.nature: In the Conversion, the 96 shares of Series A Preferred Stock, 3,402 shares of Series B Preferred Stock, 888 shares of Series B-1 Preferred Stock and 894 shares of Series C Preferred Stock held by BCIP Venture Associates II-B, LP ("BCIP Venture II-B") automatically converted into an aggregate of 5,280 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II-B held 8,145 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 8,145 shares of the Issuer's Voting Common Stock in the Reclassification.

F9 · ownership.nature: In the Conversion, the 220,146 shares of Series B Preferred Stock, 144,729 shares of Series B-1 Preferred Stock and 58,725 shares of Series C Preferred Stock held by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") automatically converted into an aggregate of 423,600 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Coinvestment Fund II held 423,600 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 423,600 shares of the Issuer's Voting Common Stock in the Reclassification.

F10 · ownership.nature: In the Conversion, the 8,805 shares of Series B Preferred Stock, 5,790 shares of Series B-1 Preferred Stock and 2,349 shares of Series C Preferred Stock held by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and, together with Venture Fund 2014, Venture Fund 2016, BCIP Venture, BCIP Venture-B, BCIP Venture II, BCIP Venture II-B and Venture Coinvestment Fund II, the "Bain Capital Venture Entities") automatically converted into an aggregate of 16,944 shares of the Issuer's Class A Common Stock. Following the Conversion, 2019-MD Coinvestment II held 16,944 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 16,944 shares of the Issuer's Voting Common Stock in the Reclassification.

F11 · ownership.nature: Bain Capital Venture Investors, LLC ("BCVI") is (i) the general partner of Bain Capital Venture Partners 2014, L.P. ("Venture Partners 2014"), which is the general partner of Venture Fund 2014, (ii) the general partner of Bain Capital Venture Partners 2016, L.P. ("Venture Partners 2016"), which is the general partner of Venture Fund 2016 and (iii) the manager of Bain Capital Venture Coinvestment II Investors, LLC ("Venture Coinvestment II Investors"), which is the general partner of each of Venture Coinvestment Fund II and 2019-MD Coinvestment II. Boylston Coinvestors, LLC is (i) the managing partner of each of BCIP Venture and BCIP Venture-B and (ii) the general partner of each of BCIP Venture II and BCIP Venture II-B. The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal.

F12 · ownership.nature: (Continued From Footnote 11) As a result, each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to all of the securities held by the Bain Capital Venture Entities. Each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal disclaims beneficial ownership of such securities except to the extent of its or his pecuniary interest therein.

SEC source: 0000899243-21-021456 · doc4.xml · nonDerivative · entry 4

BAIN CAPITAL VENTURE INVESTORS, LLC · CIK 0001309469 · 10% owner

BCIP Venture Associates II, L.P. · CIK 0001859026 · 10% owner

BCIP Venture Associates II-B, LP · CIK 0001859012 · 10% owner

Salem Enrique T · CIK 0001295402 · 10% owner

Agarwal Ajay · CIK 0001708763 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 16,274,364

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F3 · ownership.nature: In the Conversion, the 488,607 shares of Series A Preferred Stock, 915,603 shares of Series B Preferred Stock and 6,819,693 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014") automatically converted into an aggregate of 8,223,903 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2014 held 13,573,035 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 13,573,035 shares of the Issuer's Voting Common Stock in the Reclassification.

F4 · ownership.nature: In the Conversion, the 11,376 shares of Series A Preferred Stock, 245,901 shares of Series B Preferred Stock and 64,047 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016") automatically converted into an aggregate of 321,324 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2016 held 665,271 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 665,271 shares of the Issuer's Voting Common Stock in the Reclassification.

F5 · ownership.nature: In the Conversion, the 49,803 shares of Series A Preferred Stock, 93,345 shares of Series B Preferred Stock and 695,265 shares of Series C Preferred Stock held by BCIP Venture Associates ("BCIP Venture") automatically converted into an aggregate of 838,413 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture held 1,383,753 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 1,383,753 shares of the Issuer's Voting Common Stock in the Reclassification.

F6 · ownership.nature: In the Conversion, the 3,357 shares of Series A Preferred Stock, 6,279 shares of Series B Preferred Stock and 46,773 shares of Series C Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B") automatically converted into an aggregate of 56,409 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture-B held 93,096 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 93,096 shares of the Issuer's Voting Common Stock in the Reclassification.

F7 · ownership.nature: In the Conversion, the 1,137 shares of Series A Preferred Stock, 47,454 shares of Series B Preferred Stock, 15,030 shares of Series B-1 Preferred Stock and 12,504 shares of Series C Preferred Stock held by BCIP Venture Associates II, LP ("BCIP Venture II") automatically converted into an aggregate of 76,125 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II held 110,520 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 110,520 shares of the Issuer's Voting Common Stock in the Reclassification.

F8 · ownership.nature: In the Conversion, the 96 shares of Series A Preferred Stock, 3,402 shares of Series B Preferred Stock, 888 shares of Series B-1 Preferred Stock and 894 shares of Series C Preferred Stock held by BCIP Venture Associates II-B, LP ("BCIP Venture II-B") automatically converted into an aggregate of 5,280 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II-B held 8,145 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 8,145 shares of the Issuer's Voting Common Stock in the Reclassification.

F9 · ownership.nature: In the Conversion, the 220,146 shares of Series B Preferred Stock, 144,729 shares of Series B-1 Preferred Stock and 58,725 shares of Series C Preferred Stock held by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") automatically converted into an aggregate of 423,600 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Coinvestment Fund II held 423,600 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 423,600 shares of the Issuer's Voting Common Stock in the Reclassification.

F10 · ownership.nature: In the Conversion, the 8,805 shares of Series B Preferred Stock, 5,790 shares of Series B-1 Preferred Stock and 2,349 shares of Series C Preferred Stock held by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and, together with Venture Fund 2014, Venture Fund 2016, BCIP Venture, BCIP Venture-B, BCIP Venture II, BCIP Venture II-B and Venture Coinvestment Fund II, the "Bain Capital Venture Entities") automatically converted into an aggregate of 16,944 shares of the Issuer's Class A Common Stock. Following the Conversion, 2019-MD Coinvestment II held 16,944 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 16,944 shares of the Issuer's Voting Common Stock in the Reclassification.

F11 · ownership.nature: Bain Capital Venture Investors, LLC ("BCVI") is (i) the general partner of Bain Capital Venture Partners 2014, L.P. ("Venture Partners 2014"), which is the general partner of Venture Fund 2014, (ii) the general partner of Bain Capital Venture Partners 2016, L.P. ("Venture Partners 2016"), which is the general partner of Venture Fund 2016 and (iii) the manager of Bain Capital Venture Coinvestment II Investors, LLC ("Venture Coinvestment II Investors"), which is the general partner of each of Venture Coinvestment Fund II and 2019-MD Coinvestment II. Boylston Coinvestors, LLC is (i) the managing partner of each of BCIP Venture and BCIP Venture-B and (ii) the general partner of each of BCIP Venture II and BCIP Venture II-B. The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal.

F12 · ownership.nature: (Continued From Footnote 11) As a result, each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to all of the securities held by the Bain Capital Venture Entities. Each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal disclaims beneficial ownership of such securities except to the extent of its or his pecuniary interest therein.

SEC source: 0000899243-21-021456 · doc4.xml · nonDerivative · entry 3

BAIN CAPITAL VENTURE INVESTORS, LLC · CIK 0001309469 · 10% owner

BCIP Venture Associates II, L.P. · CIK 0001859026 · 10% owner

BCIP Venture Associates II-B, LP · CIK 0001859012 · 10% owner

Salem Enrique T · CIK 0001295402 · 10% owner

Agarwal Ajay · CIK 0001708763 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 8,574,114

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F3 · ownership.nature: In the Conversion, the 488,607 shares of Series A Preferred Stock, 915,603 shares of Series B Preferred Stock and 6,819,693 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014") automatically converted into an aggregate of 8,223,903 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2014 held 13,573,035 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 13,573,035 shares of the Issuer's Voting Common Stock in the Reclassification.

F4 · ownership.nature: In the Conversion, the 11,376 shares of Series A Preferred Stock, 245,901 shares of Series B Preferred Stock and 64,047 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016") automatically converted into an aggregate of 321,324 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2016 held 665,271 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 665,271 shares of the Issuer's Voting Common Stock in the Reclassification.

F5 · ownership.nature: In the Conversion, the 49,803 shares of Series A Preferred Stock, 93,345 shares of Series B Preferred Stock and 695,265 shares of Series C Preferred Stock held by BCIP Venture Associates ("BCIP Venture") automatically converted into an aggregate of 838,413 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture held 1,383,753 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 1,383,753 shares of the Issuer's Voting Common Stock in the Reclassification.

F6 · ownership.nature: In the Conversion, the 3,357 shares of Series A Preferred Stock, 6,279 shares of Series B Preferred Stock and 46,773 shares of Series C Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B") automatically converted into an aggregate of 56,409 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture-B held 93,096 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 93,096 shares of the Issuer's Voting Common Stock in the Reclassification.

F7 · ownership.nature: In the Conversion, the 1,137 shares of Series A Preferred Stock, 47,454 shares of Series B Preferred Stock, 15,030 shares of Series B-1 Preferred Stock and 12,504 shares of Series C Preferred Stock held by BCIP Venture Associates II, LP ("BCIP Venture II") automatically converted into an aggregate of 76,125 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II held 110,520 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 110,520 shares of the Issuer's Voting Common Stock in the Reclassification.

F8 · ownership.nature: In the Conversion, the 96 shares of Series A Preferred Stock, 3,402 shares of Series B Preferred Stock, 888 shares of Series B-1 Preferred Stock and 894 shares of Series C Preferred Stock held by BCIP Venture Associates II-B, LP ("BCIP Venture II-B") automatically converted into an aggregate of 5,280 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II-B held 8,145 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 8,145 shares of the Issuer's Voting Common Stock in the Reclassification.

F9 · ownership.nature: In the Conversion, the 220,146 shares of Series B Preferred Stock, 144,729 shares of Series B-1 Preferred Stock and 58,725 shares of Series C Preferred Stock held by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") automatically converted into an aggregate of 423,600 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Coinvestment Fund II held 423,600 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 423,600 shares of the Issuer's Voting Common Stock in the Reclassification.

F10 · ownership.nature: In the Conversion, the 8,805 shares of Series B Preferred Stock, 5,790 shares of Series B-1 Preferred Stock and 2,349 shares of Series C Preferred Stock held by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and, together with Venture Fund 2014, Venture Fund 2016, BCIP Venture, BCIP Venture-B, BCIP Venture II, BCIP Venture II-B and Venture Coinvestment Fund II, the "Bain Capital Venture Entities") automatically converted into an aggregate of 16,944 shares of the Issuer's Class A Common Stock. Following the Conversion, 2019-MD Coinvestment II held 16,944 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 16,944 shares of the Issuer's Voting Common Stock in the Reclassification.

F11 · ownership.nature: Bain Capital Venture Investors, LLC ("BCVI") is (i) the general partner of Bain Capital Venture Partners 2014, L.P. ("Venture Partners 2014"), which is the general partner of Venture Fund 2014, (ii) the general partner of Bain Capital Venture Partners 2016, L.P. ("Venture Partners 2016"), which is the general partner of Venture Fund 2016 and (iii) the manager of Bain Capital Venture Coinvestment II Investors, LLC ("Venture Coinvestment II Investors"), which is the general partner of each of Venture Coinvestment Fund II and 2019-MD Coinvestment II. Boylston Coinvestors, LLC is (i) the managing partner of each of BCIP Venture and BCIP Venture-B and (ii) the general partner of each of BCIP Venture II and BCIP Venture II-B. The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal.

F12 · ownership.nature: (Continued From Footnote 11) As a result, each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to all of the securities held by the Bain Capital Venture Entities. Each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal disclaims beneficial ownership of such securities except to the extent of its or his pecuniary interest therein.

SEC source: 0000899243-21-021456 · doc4.xml · nonDerivative · entry 2

BAIN CAPITAL VENTURE INVESTORS, LLC · CIK 0001309469 · 10% owner

BCIP Venture Associates II, L.P. · CIK 0001859026 · 10% owner

BCIP Venture Associates II-B, LP · CIK 0001859012 · 10% owner

Salem Enrique T · CIK 0001295402 · 10% owner

Agarwal Ajay · CIK 0001708763 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 8,407,677

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of the Issuer's Series A, Series B, Series B-1 and Series C Preferred Stock automatically converted into one share of the Issuer's Class A Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). The shares had no expiration date.

F3 · ownership.nature: In the Conversion, the 488,607 shares of Series A Preferred Stock, 915,603 shares of Series B Preferred Stock and 6,819,693 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014") automatically converted into an aggregate of 8,223,903 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2014 held 13,573,035 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 13,573,035 shares of the Issuer's Voting Common Stock in the Reclassification.

F4 · ownership.nature: In the Conversion, the 11,376 shares of Series A Preferred Stock, 245,901 shares of Series B Preferred Stock and 64,047 shares of Series C Preferred Stock held by Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016") automatically converted into an aggregate of 321,324 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Fund 2016 held 665,271 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 665,271 shares of the Issuer's Voting Common Stock in the Reclassification.

F5 · ownership.nature: In the Conversion, the 49,803 shares of Series A Preferred Stock, 93,345 shares of Series B Preferred Stock and 695,265 shares of Series C Preferred Stock held by BCIP Venture Associates ("BCIP Venture") automatically converted into an aggregate of 838,413 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture held 1,383,753 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 1,383,753 shares of the Issuer's Voting Common Stock in the Reclassification.

F6 · ownership.nature: In the Conversion, the 3,357 shares of Series A Preferred Stock, 6,279 shares of Series B Preferred Stock and 46,773 shares of Series C Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B") automatically converted into an aggregate of 56,409 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture-B held 93,096 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 93,096 shares of the Issuer's Voting Common Stock in the Reclassification.

F7 · ownership.nature: In the Conversion, the 1,137 shares of Series A Preferred Stock, 47,454 shares of Series B Preferred Stock, 15,030 shares of Series B-1 Preferred Stock and 12,504 shares of Series C Preferred Stock held by BCIP Venture Associates II, LP ("BCIP Venture II") automatically converted into an aggregate of 76,125 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II held 110,520 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 110,520 shares of the Issuer's Voting Common Stock in the Reclassification.

F8 · ownership.nature: In the Conversion, the 96 shares of Series A Preferred Stock, 3,402 shares of Series B Preferred Stock, 888 shares of Series B-1 Preferred Stock and 894 shares of Series C Preferred Stock held by BCIP Venture Associates II-B, LP ("BCIP Venture II-B") automatically converted into an aggregate of 5,280 shares of the Issuer's Class A Common Stock. Following the Conversion, BCIP Venture II-B held 8,145 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 8,145 shares of the Issuer's Voting Common Stock in the Reclassification.

F9 · ownership.nature: In the Conversion, the 220,146 shares of Series B Preferred Stock, 144,729 shares of Series B-1 Preferred Stock and 58,725 shares of Series C Preferred Stock held by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") automatically converted into an aggregate of 423,600 shares of the Issuer's Class A Common Stock. Following the Conversion, Venture Coinvestment Fund II held 423,600 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 423,600 shares of the Issuer's Voting Common Stock in the Reclassification.

F10 · ownership.nature: In the Conversion, the 8,805 shares of Series B Preferred Stock, 5,790 shares of Series B-1 Preferred Stock and 2,349 shares of Series C Preferred Stock held by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and, together with Venture Fund 2014, Venture Fund 2016, BCIP Venture, BCIP Venture-B, BCIP Venture II, BCIP Venture II-B and Venture Coinvestment Fund II, the "Bain Capital Venture Entities") automatically converted into an aggregate of 16,944 shares of the Issuer's Class A Common Stock. Following the Conversion, 2019-MD Coinvestment II held 16,944 shares of the Issuer's Class A Common Stock, which were automatically reclassified into 16,944 shares of the Issuer's Voting Common Stock in the Reclassification.

F11 · ownership.nature: Bain Capital Venture Investors, LLC ("BCVI") is (i) the general partner of Bain Capital Venture Partners 2014, L.P. ("Venture Partners 2014"), which is the general partner of Venture Fund 2014, (ii) the general partner of Bain Capital Venture Partners 2016, L.P. ("Venture Partners 2016"), which is the general partner of Venture Fund 2016 and (iii) the manager of Bain Capital Venture Coinvestment II Investors, LLC ("Venture Coinvestment II Investors"), which is the general partner of each of Venture Coinvestment Fund II and 2019-MD Coinvestment II. Boylston Coinvestors, LLC is (i) the managing partner of each of BCIP Venture and BCIP Venture-B and (ii) the general partner of each of BCIP Venture II and BCIP Venture II-B. The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal.

F12 · ownership.nature: (Continued From Footnote 11) As a result, each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to all of the securities held by the Bain Capital Venture Entities. Each of BCVI, Venture Partners 2014, Venture Partners 2016, Venture Coinvestment II Investors and Messrs. Salem and Agarwal disclaims beneficial ownership of such securities except to the extent of its or his pecuniary interest therein.