FLYW

SEC source: 0000899243-21-045413 · doc4.xml · nonDerivative · entry 1

Butterfield Peter · CIK 0001862133 · General Counsel and CCO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,000

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.

SEC source: 0000899243-21-044668 · doc4.xml · nonDerivative · entry 5

Spark Management Partners II, LLC · CIK 0001600213 · 10% owner

SPARK CAPITAL FOUNDERS FUND II LP · CIK 0001430606 · 10% owner

Spark Growth Management Partners LLC · CIK 0001608856 · 10% owner

Spark Capital II LP · CIK 0001407645 · 10% owner

Spark Capital Growth Founders' Fund, L.P. · CIK 0001640667 · 10% owner

Spark Capital Growth Fund LP · CIK 0001608868 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 78,166

F6 · kind: Represents a pro-rata distribution, and not a purchase or sale, without additional consideration by Spark Capital Founders' Fund II, L.P. ("Spark Capital FF II") to its partners.

F7 · ownership.nature: These shares are held of record by Spark Capital FF II. SMP II is the general partner of Spark Capital FF II. The SMP II Managing Members are the managing members of SMP II. Each of the SMP II Managing Members may be deemed to share investment, voting and dispositive power over these shares. Each of SMP II and the SMP II 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: 0000899243-21-044668 · doc4.xml · nonDerivative · entry 4

Spark Management Partners II, LLC · CIK 0001600213 · 10% owner

SPARK CAPITAL FOUNDERS FUND II LP · CIK 0001430606 · 10% owner

Spark Growth Management Partners LLC · CIK 0001608856 · 10% owner

Spark Capital II LP · CIK 0001407645 · 10% owner

Spark Capital Growth Founders' Fund, L.P. · CIK 0001640667 · 10% owner

Spark Capital Growth Fund LP · CIK 0001608868 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 4,938

F10 · kind: Represents a change in the form of ownership of Spark Capital Partners, LLC ("SCP") by virtue of the receipt of shares in the pro-rata in-kind distribution of voting common stock of the Issuer for no consideration by SMP II.

F11 · ownership.nature: The shares are held by SCP. The principal managing members of SCP are Alex Finkelstein, Jeremy Philips and Santo Politi (the "SCP Managing Members"). Each of SCP and the SCP 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, if any.

SEC source: 0000899243-21-044668 · doc4.xml · nonDerivative · entry 3

Spark Management Partners II, LLC · CIK 0001600213 · 10% owner

SPARK CAPITAL FOUNDERS FUND II LP · CIK 0001430606 · 10% owner

Spark Growth Management Partners LLC · CIK 0001608856 · 10% owner

Spark Capital II LP · CIK 0001407645 · 10% owner

Spark Capital Growth Founders' Fund, L.P. · CIK 0001640667 · 10% owner

Spark Capital Growth Fund LP · CIK 0001608868 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

F5 · kind: Represents a pro-rata distribution, and not a purchase or sale, without additional consideration by SMP II to its members.

F4 · ownership.nature: The shares are held by SMP II. The SMP II Managing Members are the managing members of SMP II. Each of the SMP II Managing Members may be deemed to share investment, voting and dispositive power over these shares. Each of SMP II and the SMP II 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: 0000899243-21-044668 · doc4.xml · nonDerivative · entry 2

Spark Management Partners II, LLC · CIK 0001600213 · 10% owner

SPARK CAPITAL FOUNDERS FUND II LP · CIK 0001430606 · 10% owner

Spark Growth Management Partners LLC · CIK 0001608856 · 10% owner

Spark Capital II LP · CIK 0001407645 · 10% owner

Spark Capital Growth Founders' Fund, L.P. · CIK 0001640667 · 10% owner

Spark Capital Growth Fund LP · CIK 0001608868 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 759,765

F3 · kind: Represents a change in the form of ownership of SMP II by virtue of the receipt of shares in the pro-rata in-kind distribution of voting common stock of the Issuer for no consideration by Spark Capital II.

F4 · ownership.nature: The shares are held by SMP II. The SMP II Managing Members are the managing members of SMP II. Each of the SMP II Managing Members may be deemed to share investment, voting and dispositive power over these shares. Each of SMP II and the SMP II 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: 0000899243-21-044668 · doc4.xml · nonDerivative · entry 1

Spark Management Partners II, LLC · CIK 0001600213 · 10% owner

SPARK CAPITAL FOUNDERS FUND II LP · CIK 0001430606 · 10% owner

Spark Growth Management Partners LLC · CIK 0001608856 · 10% owner

Spark Capital II LP · CIK 0001407645 · 10% owner

Spark Capital Growth Founders' Fund, L.P. · CIK 0001640667 · 10% owner

Spark Capital Growth Fund LP · CIK 0001608868 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 11,948,786

F1 · kind: Represents a pro-rata distribution, and not a purchase or sale, without additional consideration by Spark Capital II, L.P. ("Spark Capital II") to its partners.

F2 · ownership.nature: These shares are held of record by Spark Capital II. Spark Management Partners II, LLC ("SMP II") is the general partner of Spark Capital II. Paul Conway, Bijan Sabet, Santo Politi, and Alexander J. Finkelstein, a member of the Issuer's board of directors (the "SMP II Managing Members") are the managing members of SMP II. Each of the SMP II Managing Members may be deemed to share investment, voting and dispositive power over these shares. Each of SMP II and the SMP II 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: 0000899243-21-044660 · doc4.xml · nonDerivative · entry 6

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 78,166

F6 · kind: Represents a pro-rata distribution, and not a purchase or sale, without additional consideration by Spark Capital Founders' Fund II, L.P. ("Spark Capital FF II") to its partners.

F7 · ownership.nature: These shares are held of record by Spark Capital FF II. SMP II is the general partner of Spark Capital FF II. The Reporting Person is a managing member of SMP II. The Reporting Person may be deemed to share investment, voting and dispositive power over these shares. Each of SMP II and the Reporting Person disclaims 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: 0000899243-21-044660 · doc4.xml · nonDerivative · entry 5

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 4,938

F11 · kind: Represents a change in the form of ownership of Spark Capital Partners, LLC ("SCP") by virtue of the receipt of shares in the pro-rata in-kind distribution of voting common stock of the Issuer for no consideration by SMP II.

F12 · ownership.nature: The shares are held by SCP. The Reporting Person is a managing member of SCP and may be deemed to share investment, voting and dispositive power over these shares. Each of SCP and the Reporting Person disclaims 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, if any.

SEC source: 0000899243-21-044660 · doc4.xml · nonDerivative · entry 4

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 56,983

F10 · kind: Represents a change in the form of ownership of the Reporting Person by virtue of receipt of shares as a result of the pro-rata in-kind distribution of voting common stock of the Issuer for no consideration by SMP II.

SEC source: 0000899243-21-044660 · doc4.xml · nonDerivative · entry 3

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

F5 · kind: Represents a pro-rata distribution, and not a purchase or sale, without additional consideration by SMP II to its members.

F4 · ownership.nature: The shares are held by SMP II. The Reporting Person is a managing member of SMP II. The Reporting Person may be deemed to share investment, voting and dispositive power over these shares. Each of SMP II and the Reporting Person disclaims 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: 0000899243-21-044660 · doc4.xml · nonDerivative · entry 2

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 759,765

F3 · kind: Represents a change in the form of ownership of SMP II by virtue of the receipt of shares in the pro-rata in-kind distribution of voting common stock of the Issuer for no consideration by Spark Capital II.

F4 · ownership.nature: The shares are held by SMP II. The Reporting Person is a managing member of SMP II. The Reporting Person may be deemed to share investment, voting and dispositive power over these shares. Each of SMP II and the Reporting Person disclaims 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: 0000899243-21-044660 · doc4.xml · nonDerivative · entry 1

Finkelstein Alex · CIK 0001620153 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 11,948,786

F1 · kind: Represents a pro-rata distribution, and not a purchase or sale, without additional consideration by Spark Capital II, L.P. ("Spark Capital II") to its partners.

F2 · ownership.nature: These shares are held of record by Spark Capital II. Spark Management Partners II, LLC ("SMP II") is the general partner of Spark Capital II. The Reporting Person is a managing member of SMP II. The Reporting Person may be deemed to share investment, voting and dispositive power over these shares. Each of SMP II and the Reporting Person disclaims 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: 0000899243-21-045412 · doc4.xml · nonDerivative · entry 1

King David R. · CIK 0001862946 · Chief Technology Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 686,160

F1 · shares: On November 4, 2021, the Reporting Person transferred 171,540 shares of the Issuer's common stock to a family trust of which the Reporting Person is trustee and the sole beneficiaries.

SEC source: 0000899243-21-046428 · doc4.xml · nonDerivative · entry 1

Massaro Michael · CIK 0001862130 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,105,530

F1 · shares: On October 29, 2021, the Reporting Person transferred 120,000 shares of the Issuer's Voting Common Stock to the Michael P. Massaro 2021 Irrevocable Trust, of which the Reporting Person's spouse is a trustee.

SEC source: 0000899243-21-037865 · doc4.xml · nonDerivative · entry 1

Hao Yvonne · CIK 0001668656 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,301

F1 · shares: Represents a restricted stock unit award ("RSU") that vests in three equal annual installments on each anniversary of the date of grant, subject to the Reporting Person's continuous service as a member of the Issuer's board of directors through such date. In addition, the RSU will accelerate and fully vest upon a change in control, or the Reporting Person's earlier death or disability.

SEC source: 0000899243-21-033544 · doc4.xml · derivative · 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: 0

Underlying: Voting Common Stock · 190,500 shares

Expires not disclosed

F2 · kind: Each warrant was exercisable by the holder in whole or in part at any time and from time to time on or before January 15, 2025. On June 21, 2021, each of Venture Fund 2016, BCIP Venture II and BCIP Venture II-B exercised warrants to purchase 171,882, 17,187 and 1,431 shares of the Issuer's Voting Common Stock, respectively (together with the transaction described in footnote 1 above, the "Warrant Exercises").

F2 · derivative.exercise_date: Each warrant was exercisable by the holder in whole or in part at any time and from time to time on or before January 15, 2025. On June 21, 2021, each of Venture Fund 2016, BCIP Venture II and BCIP Venture II-B exercised warrants to purchase 171,882, 17,187 and 1,431 shares of the Issuer's Voting Common Stock, respectively (together with the transaction described in footnote 1 above, the "Warrant Exercises").

F2 · derivative.expiration_date: Each warrant was exercisable by the holder in whole or in part at any time and from time to time on or before January 15, 2025. On June 21, 2021, each of Venture Fund 2016, BCIP Venture II and BCIP Venture II-B exercised warrants to purchase 171,882, 17,187 and 1,431 shares of the Issuer's Voting Common Stock, respectively (together with the transaction described in footnote 1 above, the "Warrant Exercises").

F3 · ownership.nature: Includes 13,573,035 shares of the Issuer's Voting Common Stock held directly by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014"), 904,821 shares of the Issuer's Voting Common Stock held directly by Venture Fund 2016, 1,383,753 shares of the Issuer's Voting Common Stock held directly by BCIP Venture Associates ("BCIP Venture"), 93,096 shares of the Issuer's Voting Common Stock held directly by BCIP Venture Associates-B ("BCIP Venture-B"), 134,475 shares of the Issuer's Voting Common Stock held directly by BCIP Venture II, 10,140 shares of the Issuer's Voting Common Stock held directly by BCIP Venture II-B, 423,600 shares of the Issuer's Voting Common Stock held directly by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") and 16,944 shares of the Issuer's Voting Common Stock held directly by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and,

F4 · ownership.nature: (Continued from footnote 3) 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"), in each case, after giving effect to the Warrant Exercises.

F5 · 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.

F6 · ownership.nature: (Continued From Footnote 5) 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: 0000899243-21-033544 · doc4.xml · derivative · 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: 0

Underlying: Voting Common Stock · 75,000 shares

Expires not disclosed

F1 · kind: Each warrant was exercisable by the holder in whole or in part at any time and from time to time on or before August 22, 2022. On June 21, 2021, each of Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016"), BCIP Venture Associates II, LP ("BCIP Venture II") and BCIP Venture Associates II-B, LP ("BCIP Venture II-B") exercised warrants to purchase 67,668, 6,768 and 564 shares of the Issuer's Voting Common Stock, respectively.

F1 · derivative.exercise_date: Each warrant was exercisable by the holder in whole or in part at any time and from time to time on or before August 22, 2022. On June 21, 2021, each of Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016"), BCIP Venture Associates II, LP ("BCIP Venture II") and BCIP Venture Associates II-B, LP ("BCIP Venture II-B") exercised warrants to purchase 67,668, 6,768 and 564 shares of the Issuer's Voting Common Stock, respectively.

F1 · derivative.expiration_date: Each warrant was exercisable by the holder in whole or in part at any time and from time to time on or before August 22, 2022. On June 21, 2021, each of Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016"), BCIP Venture Associates II, LP ("BCIP Venture II") and BCIP Venture Associates II-B, LP ("BCIP Venture II-B") exercised warrants to purchase 67,668, 6,768 and 564 shares of the Issuer's Voting Common Stock, respectively.

F3 · ownership.nature: Includes 13,573,035 shares of the Issuer's Voting Common Stock held directly by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014"), 904,821 shares of the Issuer's Voting Common Stock held directly by Venture Fund 2016, 1,383,753 shares of the Issuer's Voting Common Stock held directly by BCIP Venture Associates ("BCIP Venture"), 93,096 shares of the Issuer's Voting Common Stock held directly by BCIP Venture Associates-B ("BCIP Venture-B"), 134,475 shares of the Issuer's Voting Common Stock held directly by BCIP Venture II, 10,140 shares of the Issuer's Voting Common Stock held directly by BCIP Venture II-B, 423,600 shares of the Issuer's Voting Common Stock held directly by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") and 16,944 shares of the Issuer's Voting Common Stock held directly by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and,

F4 · ownership.nature: (Continued from footnote 3) 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"), in each case, after giving effect to the Warrant Exercises.

F5 · 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.

F6 · ownership.nature: (Continued From Footnote 5) 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: 0000899243-21-033544 · 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: 16,539,864

F2 · kind: Each warrant was exercisable by the holder in whole or in part at any time and from time to time on or before January 15, 2025. On June 21, 2021, each of Venture Fund 2016, BCIP Venture II and BCIP Venture II-B exercised warrants to purchase 171,882, 17,187 and 1,431 shares of the Issuer's Voting Common Stock, respectively (together with the transaction described in footnote 1 above, the "Warrant Exercises").

F3 · ownership.nature: Includes 13,573,035 shares of the Issuer's Voting Common Stock held directly by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014"), 904,821 shares of the Issuer's Voting Common Stock held directly by Venture Fund 2016, 1,383,753 shares of the Issuer's Voting Common Stock held directly by BCIP Venture Associates ("BCIP Venture"), 93,096 shares of the Issuer's Voting Common Stock held directly by BCIP Venture Associates-B ("BCIP Venture-B"), 134,475 shares of the Issuer's Voting Common Stock held directly by BCIP Venture II, 10,140 shares of the Issuer's Voting Common Stock held directly by BCIP Venture II-B, 423,600 shares of the Issuer's Voting Common Stock held directly by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") and 16,944 shares of the Issuer's Voting Common Stock held directly by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and,

F4 · ownership.nature: (Continued from footnote 3) 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"), in each case, after giving effect to the Warrant Exercises.

F5 · 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.

F6 · ownership.nature: (Continued From Footnote 5) 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: 0000899243-21-033544 · 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: 16,349,364

F1 · kind: Each warrant was exercisable by the holder in whole or in part at any time and from time to time on or before August 22, 2022. On June 21, 2021, each of Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016"), BCIP Venture Associates II, LP ("BCIP Venture II") and BCIP Venture Associates II-B, LP ("BCIP Venture II-B") exercised warrants to purchase 67,668, 6,768 and 564 shares of the Issuer's Voting Common Stock, respectively.

F3 · ownership.nature: Includes 13,573,035 shares of the Issuer's Voting Common Stock held directly by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014"), 904,821 shares of the Issuer's Voting Common Stock held directly by Venture Fund 2016, 1,383,753 shares of the Issuer's Voting Common Stock held directly by BCIP Venture Associates ("BCIP Venture"), 93,096 shares of the Issuer's Voting Common Stock held directly by BCIP Venture Associates-B ("BCIP Venture-B"), 134,475 shares of the Issuer's Voting Common Stock held directly by BCIP Venture II, 10,140 shares of the Issuer's Voting Common Stock held directly by BCIP Venture II-B, 423,600 shares of the Issuer's Voting Common Stock held directly by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") and 16,944 shares of the Issuer's Voting Common Stock held directly by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and,

F4 · ownership.nature: (Continued from footnote 3) 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"), in each case, after giving effect to the Warrant Exercises.

F5 · 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.

F6 · ownership.nature: (Continued From Footnote 5) 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: 0000899243-21-033546 · doc4.xml · derivative · 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: 0

Underlying: Voting Common Stock · 190,500 shares

Expires not disclosed

F2 · kind: Each warrant was exercisable by the holder in whole or in part at any time and from time to time on or before January 15, 2025. On June 21, 2021, each of Venture Fund 2016, BCIP Venture II and BCIP Venture II-B exercised warrants to purchase 171,882, 17,187 and 1,431 shares of the Issuer's Voting Common Stock, respectively (together with the transaction described in footnote 1 above, the "Warrant Exercises").

F2 · derivative.exercise_date: Each warrant was exercisable by the holder in whole or in part at any time and from time to time on or before January 15, 2025. On June 21, 2021, each of Venture Fund 2016, BCIP Venture II and BCIP Venture II-B exercised warrants to purchase 171,882, 17,187 and 1,431 shares of the Issuer's Voting Common Stock, respectively (together with the transaction described in footnote 1 above, the "Warrant Exercises").

F2 · derivative.expiration_date: Each warrant was exercisable by the holder in whole or in part at any time and from time to time on or before January 15, 2025. On June 21, 2021, each of Venture Fund 2016, BCIP Venture II and BCIP Venture II-B exercised warrants to purchase 171,882, 17,187 and 1,431 shares of the Issuer's Voting Common Stock, respectively (together with the transaction described in footnote 1 above, the "Warrant Exercises").

F3 · ownership.nature: Includes 13,573,035 shares of the Issuer's Voting Common Stock held directly by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014"), 904,821 shares of the Issuer's Voting Common Stock held directly by Venture Fund 2016, 1,383,753 shares of the Issuer's Voting Common Stock held directly by BCIP Venture Associates ("BCIP Venture"), 93,096 shares of the Issuer's Voting Common Stock held directly by BCIP Venture Associates-B ("BCIP Venture-B"), 134,475 shares of the Issuer's Voting Common Stock held directly by BCIP Venture II, 10,140 shares of the Issuer's Voting Common Stock held directly by BCIP Venture II-B, 423,600 shares of the Issuer's Voting Common Stock held directly by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") and 16,944 shares of the Issuer's Voting Common Stock held directly by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and,

F4 · ownership.nature: (Continued from footnote 3) 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"), in each case, after giving effect to the Warrant Exercises.

F5 · 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.

F6 · ownership.nature: (Continued From Footnote 5) 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: 0000899243-21-033546 · doc4.xml · derivative · 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: 0

Underlying: Voting Common Stock · 75,000 shares

Expires not disclosed

F1 · kind: Each warrant was exercisable by the holder in whole or in part at any time and from time to time on or before August 22, 2022. On June 21, 2021, each of Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016"), BCIP Venture Associates II, LP ("BCIP Venture II") and BCIP Venture Associates II-B, LP ("BCIP Venture II-B") exercised warrants to purchase 67,668, 6,768 and 564 shares of the Issuer's Voting Common Stock, respectively.

F1 · derivative.exercise_date: Each warrant was exercisable by the holder in whole or in part at any time and from time to time on or before August 22, 2022. On June 21, 2021, each of Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016"), BCIP Venture Associates II, LP ("BCIP Venture II") and BCIP Venture Associates II-B, LP ("BCIP Venture II-B") exercised warrants to purchase 67,668, 6,768 and 564 shares of the Issuer's Voting Common Stock, respectively.

F1 · derivative.expiration_date: Each warrant was exercisable by the holder in whole or in part at any time and from time to time on or before August 22, 2022. On June 21, 2021, each of Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016"), BCIP Venture Associates II, LP ("BCIP Venture II") and BCIP Venture Associates II-B, LP ("BCIP Venture II-B") exercised warrants to purchase 67,668, 6,768 and 564 shares of the Issuer's Voting Common Stock, respectively.

F3 · ownership.nature: Includes 13,573,035 shares of the Issuer's Voting Common Stock held directly by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014"), 904,821 shares of the Issuer's Voting Common Stock held directly by Venture Fund 2016, 1,383,753 shares of the Issuer's Voting Common Stock held directly by BCIP Venture Associates ("BCIP Venture"), 93,096 shares of the Issuer's Voting Common Stock held directly by BCIP Venture Associates-B ("BCIP Venture-B"), 134,475 shares of the Issuer's Voting Common Stock held directly by BCIP Venture II, 10,140 shares of the Issuer's Voting Common Stock held directly by BCIP Venture II-B, 423,600 shares of the Issuer's Voting Common Stock held directly by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") and 16,944 shares of the Issuer's Voting Common Stock held directly by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and,

F4 · ownership.nature: (Continued from footnote 3) 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"), in each case, after giving effect to the Warrant Exercises.

F5 · 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.

F6 · ownership.nature: (Continued From Footnote 5) 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: 0000899243-21-033546 · 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: 16,539,864

F2 · kind: Each warrant was exercisable by the holder in whole or in part at any time and from time to time on or before January 15, 2025. On June 21, 2021, each of Venture Fund 2016, BCIP Venture II and BCIP Venture II-B exercised warrants to purchase 171,882, 17,187 and 1,431 shares of the Issuer's Voting Common Stock, respectively (together with the transaction described in footnote 1 above, the "Warrant Exercises").

F3 · ownership.nature: Includes 13,573,035 shares of the Issuer's Voting Common Stock held directly by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014"), 904,821 shares of the Issuer's Voting Common Stock held directly by Venture Fund 2016, 1,383,753 shares of the Issuer's Voting Common Stock held directly by BCIP Venture Associates ("BCIP Venture"), 93,096 shares of the Issuer's Voting Common Stock held directly by BCIP Venture Associates-B ("BCIP Venture-B"), 134,475 shares of the Issuer's Voting Common Stock held directly by BCIP Venture II, 10,140 shares of the Issuer's Voting Common Stock held directly by BCIP Venture II-B, 423,600 shares of the Issuer's Voting Common Stock held directly by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") and 16,944 shares of the Issuer's Voting Common Stock held directly by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and,

F4 · ownership.nature: (Continued from footnote 3) 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"), in each case, after giving effect to the Warrant Exercises.

F5 · 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.

F6 · ownership.nature: (Continued From Footnote 5) 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: 0000899243-21-033546 · doc4.xml · nonDerivative · entry 1

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: 16,349,364

F1 · kind: Each warrant was exercisable by the holder in whole or in part at any time and from time to time on or before August 22, 2022. On June 21, 2021, each of Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016"), BCIP Venture Associates II, LP ("BCIP Venture II") and BCIP Venture Associates II-B, LP ("BCIP Venture II-B") exercised warrants to purchase 67,668, 6,768 and 564 shares of the Issuer's Voting Common Stock, respectively.

F3 · ownership.nature: Includes 13,573,035 shares of the Issuer's Voting Common Stock held directly by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014"), 904,821 shares of the Issuer's Voting Common Stock held directly by Venture Fund 2016, 1,383,753 shares of the Issuer's Voting Common Stock held directly by BCIP Venture Associates ("BCIP Venture"), 93,096 shares of the Issuer's Voting Common Stock held directly by BCIP Venture Associates-B ("BCIP Venture-B"), 134,475 shares of the Issuer's Voting Common Stock held directly by BCIP Venture II, 10,140 shares of the Issuer's Voting Common Stock held directly by BCIP Venture II-B, 423,600 shares of the Issuer's Voting Common Stock held directly by Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II") and 16,944 shares of the Issuer's Voting Common Stock held directly by BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II" and,

F4 · ownership.nature: (Continued from footnote 3) 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"), in each case, after giving effect to the Warrant Exercises.

F5 · 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.

F6 · ownership.nature: (Continued From Footnote 5) 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: 0000899243-21-033551 · doc4.xml · derivative · entry 4

Harris Matthew C · CIK 0001627602 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 0

Underlying: Voting Common Stock · 190,500 shares

Expires not disclosed

F2 · kind: Each warrant was exercisable by the holder in whole or in part at any time and from time to time on or before January 15, 2025. On June 21, 2021, each of Venture Fund 2016, BCIP Venture II and BCIP Venture II-B exercised warrants to purchase an aggregate of 190,500 shares of the Issuer's Voting Common Stock.

F2 · derivative.exercise_date: Each warrant was exercisable by the holder in whole or in part at any time and from time to time on or before January 15, 2025. On June 21, 2021, each of Venture Fund 2016, BCIP Venture II and BCIP Venture II-B exercised warrants to purchase an aggregate of 190,500 shares of the Issuer's Voting Common Stock.

F2 · derivative.expiration_date: Each warrant was exercisable by the holder in whole or in part at any time and from time to time on or before January 15, 2025. On June 21, 2021, each of Venture Fund 2016, BCIP Venture II and BCIP Venture II-B exercised warrants to purchase an aggregate of 190,500 shares of the Issuer's Voting Common Stock.

F3 · ownership.nature: Consists of securities held by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014"), Venture Fund 2016, Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II"), BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II"), BCIP Venture Associates ("BCIP Venture"), BCIP Venture Associates-B ("BCIP Venture-B" and, together with Venture Fund 2014, Venture Fund 2016, Venture Coinvestment Fund II, 2019-MD Coinvestment II, BCIP Venture, BCIP Venture II and BCIP Venture II-B, the "Bain Capital Venture Entities"), BCIP Venture II and BCIP Venture II-B.

F4 · ownership.nature: Bain Capital Venture Investors, LLC ("BCVI") (i) is the ultimate general partner of Venture Fund 2014, Venture Fund 2016, Venture Coinvestment Fund II and 2019-MD Coinvestment II and (ii) governs the investment strategy and decision-making process with respect to investments held by each of BCIP Venture, BCIP Venture-B, BCIP Venture II and BCIP Venture II-B. Mr. Harris is a Managing Director of BCVI. By virtue of the relationships described in this footnote, Mr. Harris may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Venture Entities. Mr. Harris disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.

SEC source: 0000899243-21-033551 · doc4.xml · derivative · entry 3

Harris Matthew C · CIK 0001627602 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 0

Underlying: Voting Common Stock · 75,000 shares

Expires not disclosed

F1 · kind: Each warrant was exercisable by the holder in whole or in part at any time and from time to time on or before August 22, 2022. On June 21, 2021, each of Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016"), BCIP Venture Associates II, LP ("BCIP Venture II") and BCIP Venture Associates II-B, LP ("BCIP Venture II-B") exercised warrants to purchase an aggregate of 75,000 shares of the Issuer's Voting Common Stock.

F1 · derivative.exercise_date: Each warrant was exercisable by the holder in whole or in part at any time and from time to time on or before August 22, 2022. On June 21, 2021, each of Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016"), BCIP Venture Associates II, LP ("BCIP Venture II") and BCIP Venture Associates II-B, LP ("BCIP Venture II-B") exercised warrants to purchase an aggregate of 75,000 shares of the Issuer's Voting Common Stock.

F1 · derivative.expiration_date: Each warrant was exercisable by the holder in whole or in part at any time and from time to time on or before August 22, 2022. On June 21, 2021, each of Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016"), BCIP Venture Associates II, LP ("BCIP Venture II") and BCIP Venture Associates II-B, LP ("BCIP Venture II-B") exercised warrants to purchase an aggregate of 75,000 shares of the Issuer's Voting Common Stock.

F3 · ownership.nature: Consists of securities held by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014"), Venture Fund 2016, Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II"), BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II"), BCIP Venture Associates ("BCIP Venture"), BCIP Venture Associates-B ("BCIP Venture-B" and, together with Venture Fund 2014, Venture Fund 2016, Venture Coinvestment Fund II, 2019-MD Coinvestment II, BCIP Venture, BCIP Venture II and BCIP Venture II-B, the "Bain Capital Venture Entities"), BCIP Venture II and BCIP Venture II-B.

F4 · ownership.nature: Bain Capital Venture Investors, LLC ("BCVI") (i) is the ultimate general partner of Venture Fund 2014, Venture Fund 2016, Venture Coinvestment Fund II and 2019-MD Coinvestment II and (ii) governs the investment strategy and decision-making process with respect to investments held by each of BCIP Venture, BCIP Venture-B, BCIP Venture II and BCIP Venture II-B. Mr. Harris is a Managing Director of BCVI. By virtue of the relationships described in this footnote, Mr. Harris may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Venture Entities. Mr. Harris disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.

SEC source: 0000899243-21-033551 · doc4.xml · nonDerivative · entry 2

Harris Matthew C · CIK 0001627602 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 16,539,864

F2 · kind: Each warrant was exercisable by the holder in whole or in part at any time and from time to time on or before January 15, 2025. On June 21, 2021, each of Venture Fund 2016, BCIP Venture II and BCIP Venture II-B exercised warrants to purchase an aggregate of 190,500 shares of the Issuer's Voting Common Stock.

F3 · ownership.nature: Consists of securities held by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014"), Venture Fund 2016, Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II"), BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II"), BCIP Venture Associates ("BCIP Venture"), BCIP Venture Associates-B ("BCIP Venture-B" and, together with Venture Fund 2014, Venture Fund 2016, Venture Coinvestment Fund II, 2019-MD Coinvestment II, BCIP Venture, BCIP Venture II and BCIP Venture II-B, the "Bain Capital Venture Entities"), BCIP Venture II and BCIP Venture II-B.

F4 · ownership.nature: Bain Capital Venture Investors, LLC ("BCVI") (i) is the ultimate general partner of Venture Fund 2014, Venture Fund 2016, Venture Coinvestment Fund II and 2019-MD Coinvestment II and (ii) governs the investment strategy and decision-making process with respect to investments held by each of BCIP Venture, BCIP Venture-B, BCIP Venture II and BCIP Venture II-B. Mr. Harris is a Managing Director of BCVI. By virtue of the relationships described in this footnote, Mr. Harris may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Venture Entities. Mr. Harris disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.

SEC source: 0000899243-21-033551 · doc4.xml · nonDerivative · entry 1

Harris Matthew C · CIK 0001627602 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 16,349,364

F1 · kind: Each warrant was exercisable by the holder in whole or in part at any time and from time to time on or before August 22, 2022. On June 21, 2021, each of Bain Capital Venture Fund 2016, L.P. ("Venture Fund 2016"), BCIP Venture Associates II, LP ("BCIP Venture II") and BCIP Venture Associates II-B, LP ("BCIP Venture II-B") exercised warrants to purchase an aggregate of 75,000 shares of the Issuer's Voting Common Stock.

F3 · ownership.nature: Consists of securities held by Bain Capital Venture Fund 2014, L.P. ("Venture Fund 2014"), Venture Fund 2016, Bain Capital Venture Coinvestment Fund II, L.P. ("Venture Coinvestment Fund II"), BCV 2019-MD Coinvestment II, L.P. ("2019-MD Coinvestment II"), BCIP Venture Associates ("BCIP Venture"), BCIP Venture Associates-B ("BCIP Venture-B" and, together with Venture Fund 2014, Venture Fund 2016, Venture Coinvestment Fund II, 2019-MD Coinvestment II, BCIP Venture, BCIP Venture II and BCIP Venture II-B, the "Bain Capital Venture Entities"), BCIP Venture II and BCIP Venture II-B.

F4 · ownership.nature: Bain Capital Venture Investors, LLC ("BCVI") (i) is the ultimate general partner of Venture Fund 2014, Venture Fund 2016, Venture Coinvestment Fund II and 2019-MD Coinvestment II and (ii) governs the investment strategy and decision-making process with respect to investments held by each of BCIP Venture, BCIP Venture-B, BCIP Venture II and BCIP Venture II-B. Mr. Harris is a Managing Director of BCVI. By virtue of the relationships described in this footnote, Mr. Harris may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Venture Entities. Mr. Harris disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.

SEC source: 0000899243-21-022036 · doc4.xml · nonDerivative · entry 1

Riese Phillip John · CIK 0001307696 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,292

F1 · shares: Represents a restricted stock unit award that vests on the earlier of (a) June 2 2022, and (b) the Issuer's next annual meeting of stockholders, provided that the Reporting Person has provided continuous service to the Issuer through such date.

SEC source: 0000899243-21-022053 · doc4.xml · nonDerivative · entry 1

Santos Edwin J · CIK 0001548238 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,583

F1 · shares: Represents a restricted stock unit award that vests on the earlier of (a) June 2 2022, and (b) the Issuer's next annual meeting of stockholders, provided that the Reporting Person has provided continuous service to the Issuer through such date.

SEC source: 0000899243-21-021115 · doc4.xml · nonDerivative · entry 2

King David R. · CIK 0001862946 · Chief Technology Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 857,700

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F2 · shares: 161,640 of the shares reported in Table 1 of this Form 3 are subject to vesting in eight equal monthly installments beginning on June 17, 2021.

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

SEC source: 0000899243-21-021115 · doc4.xml · nonDerivative · entry 1

King David R. · CIK 0001862946 · Chief Technology Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F2 · shares: 161,640 of the shares reported in Table 1 of this Form 3 are subject to vesting in eight equal monthly installments beginning on June 17, 2021.

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

SEC source: 0000899243-21-021123 · doc4.xml · nonDerivative · entry 6

Ellis Michael G · CIK 0001862898 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By GRAT

Disclosed balance after: 30,000

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F3 · ownership.nature: The shares are held by the Michael Ellis 2021 Grantor Retained Annuity Trust No. 2, of which the Reporting Person is a trustee. The Reporting Person disclaims beneficial ownership of these shares and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such shares for purposes of Section 16 or for any other purpose, except to the extent of the Reporting Person's pecuniary interests therein, if any.

SEC source: 0000899243-21-021123 · doc4.xml · nonDerivative · entry 5

Ellis Michael G · CIK 0001862898 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By GRAT

Disclosed balance after: 30,000

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F2 · ownership.nature: The shares are held by the Michael Ellis 2021 Grantor Retained Annuity Trust No. 1, of which the Reporting Person is a trustee. The Reporting Person disclaims beneficial ownership of these shares and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such shares for purposes of Section 16 or for any other purpose, except to the extent of the Reporting Person's pecuniary interests therein, if any.

SEC source: 0000899243-21-021123 · doc4.xml · nonDerivative · entry 4

Ellis Michael G · CIK 0001862898 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 37,500

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

SEC source: 0000899243-21-021123 · doc4.xml · nonDerivative · entry 3

Ellis Michael G · CIK 0001862898 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By GRAT

Disclosed balance after: 0

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F3 · ownership.nature: The shares are held by the Michael Ellis 2021 Grantor Retained Annuity Trust No. 2, of which the Reporting Person is a trustee. The Reporting Person disclaims beneficial ownership of these shares and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such shares for purposes of Section 16 or for any other purpose, except to the extent of the Reporting Person's pecuniary interests therein, if any.

SEC source: 0000899243-21-021123 · doc4.xml · nonDerivative · entry 2

Ellis Michael G · CIK 0001862898 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By GRAT

Disclosed balance after: 0

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F2 · ownership.nature: The shares are held by the Michael Ellis 2021 Grantor Retained Annuity Trust No. 1, of which the Reporting Person is a trustee. The Reporting Person disclaims beneficial ownership of these shares and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such shares for purposes of Section 16 or for any other purpose, except to the extent of the Reporting Person's pecuniary interests therein, if any.

SEC source: 0000899243-21-021123 · doc4.xml · nonDerivative · entry 1

Ellis Michael G · CIK 0001862898 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

SEC source: 0000899243-21-021121 · doc4.xml · nonDerivative · entry 6

Massaro Michael · CIK 0001862130 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By: GRAT

Disclosed balance after: 120,000

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F3 · ownership.nature: The shares are held by the Michael P. Massaro 2021 Qualified Annuity Trust, of which the Reporting Person is a trustee. The Reporting Person disclaims beneficial ownership of these shares and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such shares for purposes of Section 16 or for any other purpose, except to the extent of the Reporting Person's pecuniary interests therein, if any.

SEC source: 0000899243-21-021121 · doc4.xml · nonDerivative · entry 5

Massaro Michael · CIK 0001862130 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 180,000

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F2 · ownership.nature: The shares are held by the Michael P. Massaro 2021 Irrevocable Trust, of which the Reporting Person's spouse is a trustee. The Reporting Person disclaims beneficial ownership of these shares and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such shares for purposes of Section 16 or for any other purpose, except to the extent of the Reporting Person's pecuniary interests therein, if any.

SEC source: 0000899243-21-021121 · doc4.xml · nonDerivative · entry 4

Massaro Michael · CIK 0001862130 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,225,530

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

SEC source: 0000899243-21-021121 · doc4.xml · nonDerivative · entry 3

Massaro Michael · CIK 0001862130 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By: GRAT

Disclosed balance after: 0

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F3 · ownership.nature: The shares are held by the Michael P. Massaro 2021 Qualified Annuity Trust, of which the Reporting Person is a trustee. The Reporting Person disclaims beneficial ownership of these shares and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such shares for purposes of Section 16 or for any other purpose, except to the extent of the Reporting Person's pecuniary interests therein, if any.

SEC source: 0000899243-21-021121 · doc4.xml · nonDerivative · entry 2

Massaro Michael · CIK 0001862130 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F2 · ownership.nature: The shares are held by the Michael P. Massaro 2021 Irrevocable Trust, of which the Reporting Person's spouse is a trustee. The Reporting Person disclaims beneficial ownership of these shares and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such shares for purposes of Section 16 or for any other purpose, except to the extent of the Reporting Person's pecuniary interests therein, if any.

SEC source: 0000899243-21-021121 · doc4.xml · nonDerivative · entry 1

Massaro Michael · CIK 0001862130 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

SEC source: 0000899243-21-021120 · doc4.xml · nonDerivative · entry 2

Orgel Rob · CIK 0001862049 · President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 75,000

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F2 · ownership.nature: The shares are held by a trust, of which the Reporting Person's spouse is the trustee. The Reporting Person disclaims beneficial ownership of these shares and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such shares for purposes of Section 16 or for any other purpose, except to the extent of the Reporting Person's pecuniary interests therein, if any.

SEC source: 0000899243-21-021120 · doc4.xml · nonDerivative · entry 1

Orgel Rob · CIK 0001862049 · President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F1 · 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 immediately prior to the closing of the Issuer's initial public offering.

F2 · ownership.nature: The shares are held by a trust, of which the Reporting Person's spouse is the trustee. The Reporting Person disclaims beneficial ownership of these shares and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such shares for purposes of Section 16 or for any other purpose, except to the extent of the Reporting Person's pecuniary interests therein, if any.

SEC source: 0000899243-21-021124 · doc4.xml · derivative · entry 32

Spark Management Partners II, LLC · CIK 0001600213 · 10% owner

SPARK CAPITAL FOUNDERS FUND II LP · CIK 0001430606 · 10% owner

Spark Growth Management Partners LLC · CIK 0001608856 · 10% owner

Spark Capital II LP · CIK 0001407645 · 10% owner

Spark Capital Growth Founders' Fund, L.P. · CIK 0001640667 · 10% owner

Spark Capital Growth Fund LP · CIK 0001608868 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Class A Common Stock · 47,301 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 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.

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.

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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: 0000899243-21-021124 · doc4.xml · derivative · entry 31

Spark Management Partners II, LLC · CIK 0001600213 · 10% owner

SPARK CAPITAL FOUNDERS FUND II LP · CIK 0001430606 · 10% owner

Spark Growth Management Partners LLC · CIK 0001608856 · 10% owner

Spark Capital II LP · CIK 0001407645 · 10% owner

Spark Capital Growth Founders' Fund, L.P. · CIK 0001640667 · 10% owner

Spark Capital Growth Fund LP · CIK 0001608868 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Class A Common Stock · 357,141 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 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.

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.

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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: 0000899243-21-021124 · doc4.xml · derivative · entry 30

Spark Management Partners II, LLC · CIK 0001600213 · 10% owner

SPARK CAPITAL FOUNDERS FUND II LP · CIK 0001430606 · 10% owner

Spark Growth Management Partners LLC · CIK 0001608856 · 10% owner

Spark Capital II LP · CIK 0001407645 · 10% owner

Spark Capital Growth Founders' Fund, L.P. · CIK 0001640667 · 10% owner

Spark Capital Growth Fund LP · CIK 0001608868 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Class A Common Stock · 3,534 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 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.

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.

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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: 0000899243-21-021124 · doc4.xml · derivative · entry 29

Spark Management Partners II, LLC · CIK 0001600213 · 10% owner

SPARK CAPITAL FOUNDERS FUND II LP · CIK 0001430606 · 10% owner

Spark Growth Management Partners LLC · CIK 0001608856 · 10% owner

Spark Capital II LP · CIK 0001407645 · 10% owner

Spark Capital Growth Founders' Fund, L.P. · CIK 0001640667 · 10% owner

Spark Capital Growth Fund LP · CIK 0001608868 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Class A Common Stock · 309 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 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.

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.

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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 Alexander J, Finkelstein, 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: 0000899243-21-021124 · doc4.xml · derivative · entry 28

Spark Management Partners II, LLC · CIK 0001600213 · 10% owner

SPARK CAPITAL FOUNDERS FUND II LP · CIK 0001430606 · 10% owner

Spark Growth Management Partners LLC · CIK 0001608856 · 10% owner

Spark Capital II LP · CIK 0001407645 · 10% owner

Spark Capital Growth Founders' Fund, L.P. · CIK 0001640667 · 10% owner

Spark Capital Growth Fund LP · CIK 0001608868 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Class A Common Stock · 3,054,843 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 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.

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.

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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.