PD

SEC source: 0001209191-19-052894 · doc4.xml · nonDerivative · entry 3

Andreessen Horowitz Fund III, L.P. · CIK 0001540352 · 10% owner

Andreessen Horowitz Fund III-A, L.P. · CIK 0001540355 · 10% owner

Andreessen Horowitz Fund III-B, L.P. · CIK 0001540353 · 10% owner

Andreessen Horowitz Fund III-Q, L.P. · CIK 0001540245 · 10% owner

AH Equity Partners III, L.L.C. · CIK 0001540361 · 10% owner

Andreessen Marc L · CIK 0001160077 · 10% owner

HOROWITZ BENJAMIN A · CIK 0001166586 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By: AH Equity Partners III, L.L.C.

Disclosed balance after: 0

F6 · kind: On October 8, 2019, AH EP III distributed, for no consideration, 17,555 shares of the Fund III Shares to its members, representing each such member's pro rata interest in such Fund III Shares.

F7 · ownership.nature: The managing members of AH EP III are Marc Andreessen and Ben Horowitz. AH EP III and its managing members share voting and dispositive power with regard to the securities held by the AH Fund III Entities. Each of the Reporting Persons disclaims the existence of a "group" and disclaims beneficial ownership of these securities, except to the extent of its pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purpose.

SEC source: 0001209191-19-052894 · doc4.xml · nonDerivative · entry 2

Andreessen Horowitz Fund III, L.P. · CIK 0001540352 · 10% owner

Andreessen Horowitz Fund III-A, L.P. · CIK 0001540355 · 10% owner

Andreessen Horowitz Fund III-B, L.P. · CIK 0001540353 · 10% owner

Andreessen Horowitz Fund III-Q, L.P. · CIK 0001540245 · 10% owner

AH Equity Partners III, L.L.C. · CIK 0001540361 · 10% owner

Andreessen Marc L · CIK 0001160077 · 10% owner

HOROWITZ BENJAMIN A · CIK 0001166586 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Andreessen Horowitz Fund III, L.P.

Disclosed balance after: 10,057,519

F3 · kind: On October 8, 2019, Andreessen Horowitz Fund III, L.P., for itself and as nominee for Andreessen Horowitz Fund III-A, L.P., Andreessen Horowitz Fund III-B, L.P. and Andreessen Horowitz Fund III-Q, L.P. (collectively, the "AH Fund III Entities") distributed, for no consideration, 1,774,856 shares of Common Stock of the Issuer (the "Fund III Shares") to their respective limited partners and to AH Equity Partners III, L.L.C.("AH EP III"), the general partner of the AH Fund III Entities, representing each such partner's pro rata interest in such Fund III Shares.

F4 · ownership.nature: The reported securities are held of record by Andreessen Horowitz Fund III, L.P., for itself and as nominee for Andreessen Horowitz Fund III-A, L.P., Andreessen Horowitz Fund III-B, L.P. and Andreessen Horowitz Fund III-Q, L.P. AH EP III is the general partner of the AH Fund III Entities. The managing members of AH EP III are Marc Andreessen and Ben Horowitz. AH EP III and its managing members share voting and dispositive power with regard to the securities held by the AH Fund III Entities.

F5 · ownership.nature: Each of the Reporting Persons disclaims the existence of a "group" and disclaims beneficial ownership of the shares held by the AH Fund III Entities (and this report shall not be deemed an admission that any such person is the beneficial owner of such shares), except to the extent of its pecuniary interest, if any, in such shares by virtue of its interest in the AH Fund III Entities and/or AH EP III, as applicable.

SEC source: 0001209191-19-052895 · doc4.xml · nonDerivative · entry 3

OFARRELL JOHN · CIK 0001191712 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 2,685

F6 · kind: Represents shares received by O'Farrell Principe Living Trust ua 4-30-1999 pursuant to pro rata distribution by the AH Fund III Entities and AH EP III for no consideration, of shares of the Fund III Shares to their respective partners and such partner's members, as applicable.

F7 · ownership.nature: The shares are held of record by O'Farrell Principe Living Trust ua 4-30-1999 for which the Reporting Person is a trustee.

SEC source: 0001209191-19-052895 · doc4.xml · nonDerivative · entry 2

OFARRELL JOHN · CIK 0001191712 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By: AH Equity Partners III, L.L.C.

Disclosed balance after: 0

F4 · kind: On October 8, 2019, AH EP III distributed, for no consideration, 17,555 shares of the Fund III Shares to its members, representing each such member's pro rata interest in such Fund III Shares.

F5 · ownership.nature: The managing members of AH EP III are Marc Andreessen and Ben Horowitz. AH EP III and its managing members share voting and dispositive power with regard to the securities held by the AH Fund III Entities. Each of the Reporting Persons disclaims the existence of a "group" and disclaims beneficial ownership of these securities, except to the extent of its pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purpose.

SEC source: 0001209191-19-052895 · doc4.xml · nonDerivative · entry 1

OFARRELL JOHN · CIK 0001191712 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Andreessen Horowitz Fund III, L.P.

Disclosed balance after: 10,057,519

F1 · kind: On October 8, 2019, Andreessen Horowitz Fund III, L.P., for itself and as nominee for Andreessen Horowitz Fund III-A, L.P., Andreessen Horowitz Fund III-B, L.P. and Andreessen Horowitz Fund III-Q, L.P. (collectively, the "AH Fund III Entities") distributed, for no consideration, 1,774,856 shares of Common Stock of the Issuer (the "Fund III Shares") to their respective limited partners and to AH Equity Partners III, L. L.C.("AH EP III"), the general partner of the AH Fund III Entities, representing each such partner's pro rata interest in such Fund III Shares.

F2 · ownership.nature: The reported securities are held of record by Andreessen Horowitz Fund III, L.P., for itself and as nominee for Andreessen Horowitz Fund III-A, L.P., Andreessen Horowitz Fund III-B, L.P. and Andreessen Horowitz Fund III-Q, L.P. AH EP III is the general partner of the AH Fund III Entities. The managing members of AH EP III are Marc Andreessen and Ben Horowitz. AH EP III and its managing members share voting and dispositive power with regard to the securities held by the AH Fund III Entities.

F3 · ownership.nature: Each of the Reporting Persons disclaims the existence of a "group" and disclaims beneficial ownership of the shares held by the AH Fund III Entities (and this report shall not be deemed an admission that any such person is the beneficial owner of such shares), except to the extent of its pecuniary interest, if any, in such shares by virtue of its interest in the AH Fund III Entities and/or AH EP III, as applicable.

SEC source: 0000899243-19-025455 · doc4.xml · nonDerivative · entry 1

Bessemer Venture Partners VIII L.P. · CIK 0001508900 · 10% owner

Bessemer Venture Partners VIII Institutional L.P. · CIK 0001508902 · 10% owner

Deer VIII & Co. L.P. · CIK 0001559306 · 10% owner

Deer VIII & Co. Ltd. · CIK 0001559311 · 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: 7,355,002

F1 · kind: On October 8, 2019, Bessemer Venture Partners VIII Institutional L.P. ("BVP VIII Inst") and Bessemer Venture Partners VIII L.P. ("BVP VIII", and together with BVP VIII Inst, the "BVP VIII Funds") distributed, for no consideration, 446,203, and 371,019 shares (collectively, the "Shares"), respectively, of Common Stock to their limited partners and to Deer VIII & Co. L.P. ("Deer VIII L.P."), representing each such partner's pro rata interest in such Shares. On the same date, one or more of such limited partner(s) distributed, for no consideration, the Shares to certain of its or their members in an amount equal to each such member's or members' respective pro rata interests in the Shares. Finally, on the same date, Deer VIII L.P. distributed, for no consideration, the Shares it received from the distributions to its partners in an amount equal to each such partner's pro rata interest in the Shares.

F2 · kind: (continued from footnote 1) All of the aforementioned distributions were made in accordance with the exemption afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended.

F1 · shares: On October 8, 2019, Bessemer Venture Partners VIII Institutional L.P. ("BVP VIII Inst") and Bessemer Venture Partners VIII L.P. ("BVP VIII", and together with BVP VIII Inst, the "BVP VIII Funds") distributed, for no consideration, 446,203, and 371,019 shares (collectively, the "Shares"), respectively, of Common Stock to their limited partners and to Deer VIII & Co. L.P. ("Deer VIII L.P."), representing each such partner's pro rata interest in such Shares. On the same date, one or more of such limited partner(s) distributed, for no consideration, the Shares to certain of its or their members in an amount equal to each such member's or members' respective pro rata interests in the Shares. Finally, on the same date, Deer VIII L.P. distributed, for no consideration, the Shares it received from the distributions to its partners in an amount equal to each such partner's pro rata interest in the Shares.

F2 · shares: (continued from footnote 1) All of the aforementioned distributions were made in accordance with the exemption afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended.

F1 · price: On October 8, 2019, Bessemer Venture Partners VIII Institutional L.P. ("BVP VIII Inst") and Bessemer Venture Partners VIII L.P. ("BVP VIII", and together with BVP VIII Inst, the "BVP VIII Funds") distributed, for no consideration, 446,203, and 371,019 shares (collectively, the "Shares"), respectively, of Common Stock to their limited partners and to Deer VIII & Co. L.P. ("Deer VIII L.P."), representing each such partner's pro rata interest in such Shares. On the same date, one or more of such limited partner(s) distributed, for no consideration, the Shares to certain of its or their members in an amount equal to each such member's or members' respective pro rata interests in the Shares. Finally, on the same date, Deer VIII L.P. distributed, for no consideration, the Shares it received from the distributions to its partners in an amount equal to each such partner's pro rata interest in the Shares.

F2 · price: (continued from footnote 1) All of the aforementioned distributions were made in accordance with the exemption afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended.

F3 · balance_after: After the distribution, 3,339,170 shares of Common Stock are held by BVP VIII, and 4,015,832 shares of Common Stock are held by BVP VIII Inst.

F4 · ownership.nature: Deer VIII & Co. Ltd. ("Deer Ltd.") is the general partner of Deer VIII L.P., which is the general partner of BVP VIII Inst and BVP VIII. Each of Deer Ltd. and Deer VIII L.P. disclaim beneficial ownership of the securities held by the BVP VIII Funds, and this report shall not be deemed an admission that Deer Ltd. and Deer L.P. are the beneficial owners of such securities, except to the extent of their pecuniary interest therein, if any, by virtue of their direct and indirect general partner interests in the Funds.

SEC source: 0001209191-19-052894 · doc4.xml · nonDerivative · entry 1

Andreessen Horowitz Fund III, L.P. · CIK 0001540352 · 10% owner

Andreessen Horowitz Fund III-A, L.P. · CIK 0001540355 · 10% owner

Andreessen Horowitz Fund III-B, L.P. · CIK 0001540353 · 10% owner

Andreessen Horowitz Fund III-Q, L.P. · CIK 0001540245 · 10% owner

AH Equity Partners III, L.L.C. · CIK 0001540361 · 10% owner

Andreessen Marc L · CIK 0001160077 · 10% owner

HOROWITZ BENJAMIN A · CIK 0001166586 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By: LAMA Community Trust

Disclosed balance after: 8,524

F1 · kind: Represents shares received by the LAMA Community Trust pursuant to a pro rata distribution by SV Angel II, L.P., for no consideration, of shares of Common Stock of the Issuer to its partners.

F2 · ownership.nature: The shares are held of record by the LAMA Community Trust of which Marc Andreessen and his spouse are trustees. Each of the Reporting Persons disclaims the existence of a "group" and, other than Marc Andreessen, disclaims beneficial ownership of these securities, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purpose.

SEC source: 0001209191-19-052855 · doc4.xml · nonDerivative · entry 6

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel XI Strategic Partners L.P.

Disclosed balance after: 93

F11 · kind: On October 7, 2019, Accel XI Strategic Partners L.P. distributed, for no consideration, 46,660 shares of Common stock of the Issuer (the "A XI SP Shares") to its limited partners, representing each such partner's pro rata interest in such A XI SP Shares. The distribution was made in accordance with the exemptions afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended.

F12 · ownership.nature: A11A is the General Partner of Accel XI Strategic Partners L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of A11A and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-19-052855 · doc4.xml · nonDerivative · entry 5

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel XI L.P.

Disclosed balance after: 1,234

F9 · kind: On October 7, 2019, Accel XI L.P. distributed, for no consideration, 620,984 shares of Common stock of the Issuer (the "A XI Shares") to its limited partners, representing each such partner's pro rata interest in such A XI Shares. The distribution was made in accordance with the exemptions afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended.

F10 · ownership.nature: Accel XI Associates L.L.C. ("A11A") is the General Partner of Accel XI L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of A11A and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-19-052855 · doc4.xml · nonDerivative · entry 4

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Investors 2013, L.L.C.

Disclosed balance after: 131

F7 · kind: On October 7, 2019, Accel Investors 2013 L.L.C. distributed, for no consideration, 65,951 shares of Common stock of the Issuer (the "AI 2013 Shares") to its limited partners, representing each such partner's pro rata interest in such AI 2013 Shares. The distribution was made in accordance with the exemptions afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended.

F8 · ownership.nature: Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of Accel Investors 2013, L.L.C. and therefore share the voting and investment powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-19-052855 · doc4.xml · nonDerivative · entry 3

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund Strategic Partners L.P.

Disclosed balance after: 26

F5 · kind: On October 7, 2019, Accel Growth Fund Strategic Partners L.P. distributed, for no consideration, 13,132 shares of Common stock of the Issuer (the "AGF SP Shares") to its limited partners, representing each such partner's pro rata interest in such AGF SP Shares. The distribution was made in accordance with the exemptions afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended.

F6 · ownership.nature: AGFA is the General Partner of Accel Growth Fund Strategic Partners L.P., and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, Kevin J. Efrusy and Richard P. Wong are the Managing Members of AGFA and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-19-052855 · doc4.xml · nonDerivative · entry 2

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund L.P.

Disclosed balance after: 1,339

F3 · kind: On October 7, 2019, Accel Growth Fund L.P. distributed, for no consideration, 673,801 shares of Common stock of the Issuer (the "AGF Shares") to its limited partners, representing each such partner's pro rata interest in such AGF Shares. The distribution was made in accordance with the exemptions afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended.

F4 · ownership.nature: Accel Growth Fund Associates L.L.C. ("AGFA") is the General Partner of Accel Growth Fund L.P. and has the sole voting and investment power. Andrew G. Braccia, Kevin J. Efrusy, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of AGFA and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-19-052855 · doc4.xml · nonDerivative · entry 1

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 93

F1 · kind: On October 7, 2019, Accel Growth Fund Investors 2011 L.L.C. distributed, for no consideration, 46,660 shares of Common stock of the Issuer (the "AGFI 2011 Shares") to its limited partners, representing each such partner's pro rata interest in such AGFI 2011 Shares. The distribution was made in accordance with the exemptions afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended.

F2 · ownership.direct: Andrew G. Braccia, Kevin J. Efrusy, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of Accel Growth Fund Investors 2011 L.L.C. and therefore share the voting and investment powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-20-020217 · doc4.xml · nonDerivative · entry 1

HOROWITZ BENJAMIN A · CIK 0001166586 · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By: 1997 Horowitz Family Trust

Disclosed balance after: 6,712

F1 · kind: Represents shares received by a family trust for which Ben Horowitz is a trustee pursuant to a pro rata distribution by SV Angel II, L.P., for no consideration, of shares of Common Stock of the Issuer to its partners.

F2 · ownership.nature: The shares are held of record by a family trust for which Ben Horowitz is a trustee.

SEC source: 0001628280-19-004316 · wf-form4_155537534368814.xml · derivative · entry 5

Andreessen Horowitz Fund III, L.P. · CIK 0001540352 · 10% owner

Andreessen Horowitz Fund III-A, L.P. · CIK 0001540355 · 10% owner

Andreessen Horowitz Fund III-B, L.P. · CIK 0001540353 · 10% owner

Andreessen Horowitz Fund III-Q, L.P. · CIK 0001540245 · 10% owner

AH Equity Partners III, L.L.C. · CIK 0001540361 · 10% owner

Andreessen Marc L · CIK 0001160077 · 10% owner

HOROWITZ BENJAMIN A · CIK 0001166586 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Andreessen Horowitz Fund III, L.P.

Disclosed balance after: 0

Underlying: Common Stock · 5,859 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: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F1 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F1 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · ownership.nature: The reported securities are held by Andreessen Horowitz Fund III, L.P., for itself and as nominee for Andreessen Horowitz Fund III-A, L.P., Andreessen Horowitz Fund III-B, L.P. and Andreessen Horowitz Fund III-Q, L.P., or collectively, the AH Fund III Entities. The shares directly held by the AH Fund III Entities are indirectly held by AH Equity Partners III, L.L.C., or AH EP III, the general partner of the AH Fund III Entities, and by the managing members of AH EP III. The managing members of AH EP III are Marc Andreessen and Ben Horowitz. AH EP III and its managing members share voting and dispositive power with regard to the securities held by the AH Fund III Entities.

F3 · ownership.nature: (Continued from Footnote 2) Such persons and entities disclaim beneficial ownership of the shares held by the AH Fund III Entities and this report shall not be deemed an admission that he or it is the beneficial owner of such shares, except to the extent of his or its pecuniary interest, if any, in such shares by virtue of his or its interest in the AH Fund III Entities, and/or the general partner entities thereof, as applicable.

SEC source: 0001628280-19-004316 · wf-form4_155537534368814.xml · derivative · entry 4

Andreessen Horowitz Fund III, L.P. · CIK 0001540352 · 10% owner

Andreessen Horowitz Fund III-A, L.P. · CIK 0001540355 · 10% owner

Andreessen Horowitz Fund III-B, L.P. · CIK 0001540353 · 10% owner

Andreessen Horowitz Fund III-Q, L.P. · CIK 0001540245 · 10% owner

AH Equity Partners III, L.L.C. · CIK 0001540361 · 10% owner

Andreessen Marc L · CIK 0001160077 · 10% owner

HOROWITZ BENJAMIN A · CIK 0001166586 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Andreessen Horowitz Fund III, L.P.

Disclosed balance after: 0

Underlying: Common Stock · 9,554 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: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F1 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F1 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · ownership.nature: The reported securities are held by Andreessen Horowitz Fund III, L.P., for itself and as nominee for Andreessen Horowitz Fund III-A, L.P., Andreessen Horowitz Fund III-B, L.P. and Andreessen Horowitz Fund III-Q, L.P., or collectively, the AH Fund III Entities. The shares directly held by the AH Fund III Entities are indirectly held by AH Equity Partners III, L.L.C., or AH EP III, the general partner of the AH Fund III Entities, and by the managing members of AH EP III. The managing members of AH EP III are Marc Andreessen and Ben Horowitz. AH EP III and its managing members share voting and dispositive power with regard to the securities held by the AH Fund III Entities.

F3 · ownership.nature: (Continued from Footnote 2) Such persons and entities disclaim beneficial ownership of the shares held by the AH Fund III Entities and this report shall not be deemed an admission that he or it is the beneficial owner of such shares, except to the extent of his or its pecuniary interest, if any, in such shares by virtue of his or its interest in the AH Fund III Entities, and/or the general partner entities thereof, as applicable.

SEC source: 0001628280-19-004316 · wf-form4_155537534368814.xml · derivative · entry 3

Andreessen Horowitz Fund III, L.P. · CIK 0001540352 · 10% owner

Andreessen Horowitz Fund III-A, L.P. · CIK 0001540355 · 10% owner

Andreessen Horowitz Fund III-B, L.P. · CIK 0001540353 · 10% owner

Andreessen Horowitz Fund III-Q, L.P. · CIK 0001540245 · 10% owner

AH Equity Partners III, L.L.C. · CIK 0001540361 · 10% owner

Andreessen Marc L · CIK 0001160077 · 10% owner

HOROWITZ BENJAMIN A · CIK 0001166586 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Andreessen Horowitz Fund III, L.P.

Disclosed balance after: 0

Underlying: Common Stock · 1,494,120 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: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F1 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F1 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · ownership.nature: The reported securities are held by Andreessen Horowitz Fund III, L.P., for itself and as nominee for Andreessen Horowitz Fund III-A, L.P., Andreessen Horowitz Fund III-B, L.P. and Andreessen Horowitz Fund III-Q, L.P., or collectively, the AH Fund III Entities. The shares directly held by the AH Fund III Entities are indirectly held by AH Equity Partners III, L.L.C., or AH EP III, the general partner of the AH Fund III Entities, and by the managing members of AH EP III. The managing members of AH EP III are Marc Andreessen and Ben Horowitz. AH EP III and its managing members share voting and dispositive power with regard to the securities held by the AH Fund III Entities.

F3 · ownership.nature: (Continued from Footnote 2) Such persons and entities disclaim beneficial ownership of the shares held by the AH Fund III Entities and this report shall not be deemed an admission that he or it is the beneficial owner of such shares, except to the extent of his or its pecuniary interest, if any, in such shares by virtue of his or its interest in the AH Fund III Entities, and/or the general partner entities thereof, as applicable.

SEC source: 0001628280-19-004316 · wf-form4_155537534368814.xml · derivative · entry 2

Andreessen Horowitz Fund III, L.P. · CIK 0001540352 · 10% owner

Andreessen Horowitz Fund III-A, L.P. · CIK 0001540355 · 10% owner

Andreessen Horowitz Fund III-B, L.P. · CIK 0001540353 · 10% owner

Andreessen Horowitz Fund III-Q, L.P. · CIK 0001540245 · 10% owner

AH Equity Partners III, L.L.C. · CIK 0001540361 · 10% owner

Andreessen Marc L · CIK 0001160077 · 10% owner

HOROWITZ BENJAMIN A · CIK 0001166586 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Andreessen Horowitz Fund III, L.P.

Disclosed balance after: 0

Underlying: Common Stock · 10,322,842 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: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F1 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F1 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · ownership.nature: The reported securities are held by Andreessen Horowitz Fund III, L.P., for itself and as nominee for Andreessen Horowitz Fund III-A, L.P., Andreessen Horowitz Fund III-B, L.P. and Andreessen Horowitz Fund III-Q, L.P., or collectively, the AH Fund III Entities. The shares directly held by the AH Fund III Entities are indirectly held by AH Equity Partners III, L.L.C., or AH EP III, the general partner of the AH Fund III Entities, and by the managing members of AH EP III. The managing members of AH EP III are Marc Andreessen and Ben Horowitz. AH EP III and its managing members share voting and dispositive power with regard to the securities held by the AH Fund III Entities.

F3 · ownership.nature: (Continued from Footnote 2) Such persons and entities disclaim beneficial ownership of the shares held by the AH Fund III Entities and this report shall not be deemed an admission that he or it is the beneficial owner of such shares, except to the extent of his or its pecuniary interest, if any, in such shares by virtue of his or its interest in the AH Fund III Entities, and/or the general partner entities thereof, as applicable.

SEC source: 0001628280-19-004316 · wf-form4_155537534368814.xml · nonDerivative · entry 1

Andreessen Horowitz Fund III, L.P. · CIK 0001540352 · 10% owner

Andreessen Horowitz Fund III-A, L.P. · CIK 0001540355 · 10% owner

Andreessen Horowitz Fund III-B, L.P. · CIK 0001540353 · 10% owner

Andreessen Horowitz Fund III-Q, L.P. · CIK 0001540245 · 10% owner

AH Equity Partners III, L.L.C. · CIK 0001540361 · 10% owner

Andreessen Marc L · CIK 0001160077 · 10% owner

HOROWITZ BENJAMIN A · CIK 0001166586 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Andreessen Horowitz Fund III, L.P.

Disclosed balance after: 11,832,375

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: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · ownership.nature: The reported securities are held by Andreessen Horowitz Fund III, L.P., for itself and as nominee for Andreessen Horowitz Fund III-A, L.P., Andreessen Horowitz Fund III-B, L.P. and Andreessen Horowitz Fund III-Q, L.P., or collectively, the AH Fund III Entities. The shares directly held by the AH Fund III Entities are indirectly held by AH Equity Partners III, L.L.C., or AH EP III, the general partner of the AH Fund III Entities, and by the managing members of AH EP III. The managing members of AH EP III are Marc Andreessen and Ben Horowitz. AH EP III and its managing members share voting and dispositive power with regard to the securities held by the AH Fund III Entities.

F3 · ownership.nature: (Continued from Footnote 2) Such persons and entities disclaim beneficial ownership of the shares held by the AH Fund III Entities and this report shall not be deemed an admission that he or it is the beneficial owner of such shares, except to the extent of his or its pecuniary interest, if any, in such shares by virtue of his or its interest in the AH Fund III Entities, and/or the general partner entities thereof, as applicable.

SEC source: 0001628280-19-004320 · wf-form4_155537922340842.xml · derivative · entry 18

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel XI Strategic Partners L.P.

Disclosed balance after: 0

Underlying: Common Stock · 2,422 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.

F2 · derivative.exercise_price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F11 · ownership.nature: Accel XI Associates L.L.C. ("A11A") is the General Partner of Accel XI Strategic Partners L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of A11A and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004320 · wf-form4_155537922340842.xml · derivative · entry 17

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel XI L.P.

Disclosed balance after: 0

Underlying: Common Stock · 32,234 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.

F2 · derivative.exercise_price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F10 · ownership.nature: Accel XI Associates L.L.C. ("A11A") is the General Partner of Accel XI L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of A11A and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004320 · wf-form4_155537922340842.xml · derivative · entry 16

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Investors 2013, L.L.C.

Disclosed balance after: 0

Underlying: Common Stock · 3,423 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.

F2 · derivative.exercise_price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F9 · ownership.nature: Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of Accel Investors 2013, L.L.C. and therefore share the voting and investment powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004320 · wf-form4_155537922340842.xml · derivative · entry 15

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund Strategic Partners L.P.

Disclosed balance after: 0

Underlying: Common Stock · 682 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.

F2 · derivative.exercise_price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F8 · ownership.nature: Accel Growth Fund Associates L.L.C. ("AGFA") is the General Partner of Accel Growth Fund Strategic Partners L.P., and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, Kevin J. Efrusy and Richard P. Wong are the Managing Members of AGFA and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004320 · wf-form4_155537922340842.xml · derivative · entry 14

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund L.P.

Disclosed balance after: 0

Underlying: Common Stock · 34,975 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.

F2 · derivative.exercise_price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F7 · ownership.nature: Accel Growth Fund Associates L.L.C. ("AGFA") is the General Partner of Accel Growth Fund L.P. and has the sole voting and investment power. Andrew G. Braccia, Kevin J. Efrusy, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of AGFA and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004320 · wf-form4_155537922340842.xml · derivative · entry 13

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund IV Strategic Partners L.P.

Disclosed balance after: 0

Underlying: Common Stock · 1,803 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.

F2 · derivative.exercise_price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F6 · ownership.nature: Accel Growth Fund IV Associates L.L.C. ("AGF4A") is the General Partner of Accel Growth Fund IV Strategic Partners L.P., and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of AGF4A and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004320 · wf-form4_155537922340842.xml · derivative · entry 12

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund IV L.P., for itself and as nominee

Disclosed balance after: 0

Underlying: Common Stock · 316,985 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.

F2 · derivative.exercise_price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F5 · ownership.nature: Accel Growth Fund IV Associates L.L.C. ("AGF4A") is the General Partner of Accel Growth Fund IV L.P., for itself and as nominee, and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of AGF4A and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004320 · wf-form4_155537922340842.xml · derivative · entry 11

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund Investors 2016, L.L.C.

Disclosed balance after: 0

Underlying: Common Stock · 15,161 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.

F2 · derivative.exercise_price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F4 · ownership.nature: Andrew G. Braccia, Ryan J. Sweeney, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of Accel Growth Fund Investors 2016 L.L.C. and therefore share the voting and investment powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004320 · wf-form4_155537922340842.xml · derivative · entry 10

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 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: Common Stock · 2,422 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.

F2 · derivative.exercise_price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F3 · ownership.direct: Andrew G. Braccia, Kevin J. Efrusy, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of Accel Growth Fund Investors 2011 L.L.C. and therefore share the voting and investment powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004320 · wf-form4_155537922340842.xml · nonDerivative · entry 9

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel XI Strategic Partners L.P.

Disclosed balance after: 46,753

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 · shares: This Form 4 is the second of two Form 4s filed relating to the same event. Total shares includes conversion from Part 1, Table II.

F2 · price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F11 · ownership.nature: Accel XI Associates L.L.C. ("A11A") is the General Partner of Accel XI Strategic Partners L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of A11A and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004320 · wf-form4_155537922340842.xml · nonDerivative · entry 8

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel XI L.P.

Disclosed balance after: 622,218

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 · shares: This Form 4 is the second of two Form 4s filed relating to the same event. Total shares includes conversion from Part 1, Table II.

F2 · price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F10 · ownership.nature: Accel XI Associates L.L.C. ("A11A") is the General Partner of Accel XI L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of A11A and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004320 · wf-form4_155537922340842.xml · nonDerivative · entry 7

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Investors 2013, L.L.C.

Disclosed balance after: 120,933

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 · shares: This Form 4 is the second of two Form 4s filed relating to the same event. Total shares includes conversion from Part 1, Table II.

F2 · price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F9 · ownership.nature: Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of Accel Investors 2013, L.L.C. and therefore share the voting and investment powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004320 · wf-form4_155537922340842.xml · nonDerivative · entry 6

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund Strategic Partners L.P.

Disclosed balance after: 24,080

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 · shares: This Form 4 is the second of two Form 4s filed relating to the same event. Total shares includes conversion from Part 1, Table II.

F2 · price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F8 · ownership.nature: Accel Growth Fund Associates L.L.C. ("AGFA") is the General Partner of Accel Growth Fund Strategic Partners L.P., and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, Kevin J. Efrusy and Richard P. Wong are the Managing Members of AGFA and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004320 · wf-form4_155537922340842.xml · nonDerivative · entry 5

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund L.P.

Disclosed balance after: 1,235,539

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 · shares: This Form 4 is the second of two Form 4s filed relating to the same event. Total shares includes conversion from Part 1, Table II.

F2 · price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F7 · ownership.nature: Accel Growth Fund Associates L.L.C. ("AGFA") is the General Partner of Accel Growth Fund L.P. and has the sole voting and investment power. Andrew G. Braccia, Kevin J. Efrusy, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of AGFA and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004320 · wf-form4_155537922340842.xml · nonDerivative · entry 4

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund IV Strategic Partners L.P.

Disclosed balance after: 63,638

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 · shares: This Form 4 is the second of two Form 4s filed relating to the same event. Total shares includes conversion from Part 1, Table II.

F2 · price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F6 · ownership.nature: Accel Growth Fund IV Associates L.L.C. ("AGF4A") is the General Partner of Accel Growth Fund IV Strategic Partners L.P., and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of AGF4A and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004320 · wf-form4_155537922340842.xml · nonDerivative · entry 3

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund IV L.P., for itself and as nominee

Disclosed balance after: 11,185,663

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 · shares: This Form 4 is the second of two Form 4s filed relating to the same event. Total shares includes conversion from Part 1, Table II.

F2 · price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F5 · ownership.nature: Accel Growth Fund IV Associates L.L.C. ("AGF4A") is the General Partner of Accel Growth Fund IV L.P., for itself and as nominee, and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of AGF4A and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004320 · wf-form4_155537922340842.xml · nonDerivative · entry 2

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund Investors 2016, L.L.C.

Disclosed balance after: 292,084

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 · shares: This Form 4 is the second of two Form 4s filed relating to the same event. Total shares includes conversion from Part 1, Table II.

F2 · price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F4 · ownership.nature: Andrew G. Braccia, Ryan J. Sweeney, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of Accel Growth Fund Investors 2016 L.L.C. and therefore share the voting and investment powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004320 · wf-form4_155537922340842.xml · nonDerivative · entry 1

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 46,753

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 · shares: This Form 4 is the second of two Form 4s filed relating to the same event. Total shares includes conversion from Part 1, Table II.

F2 · price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F3 · ownership.direct: Andrew G. Braccia, Kevin J. Efrusy, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of Accel Growth Fund Investors 2011 L.L.C. and therefore share the voting and investment powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004319 · wf-form4_155537917984177.xml · derivative · entry 36

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel XI Strategic Partners L.P.

Disclosed balance after: 31,032

Underlying: Common Stock · 31,032 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.

F2 · derivative.exercise_price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F11 · ownership.nature: Accel XI Associates L.L.C. ("A11A") is the General Partner of Accel XI Strategic Partners L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of A11A and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004319 · wf-form4_155537917984177.xml · derivative · entry 35

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel XI L.P.

Disclosed balance after: 0

Underlying: Common Stock · 413,028 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.

F2 · derivative.exercise_price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F10 · ownership.nature: Accel XI Associates L.L.C. ("A11A") is the General Partner of Accel XI L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of A11A and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004319 · wf-form4_155537917984177.xml · derivative · entry 34

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Investors 2013, L.L.C.

Disclosed balance after: 0

Underlying: Common Stock · 43,886 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.

F2 · derivative.exercise_price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F9 · ownership.nature: Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of Accel Investors 2013, L.L.C. and therefore share the voting and investment powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004319 · wf-form4_155537917984177.xml · derivative · entry 33

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund Strategic Partners L.P.

Disclosed balance after: 0

Underlying: Common Stock · 8,734 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.

F2 · derivative.exercise_price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F8 · ownership.nature: Accel Growth Fund Associates L.L.C. ("AGFA") is the General Partner of Accel Growth Fund Strategic Partners L.P., and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, Kevin J. Efrusy and Richard P. Wong are the Managing Members of AGFA and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004319 · wf-form4_155537917984177.xml · derivative · entry 32

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund L.P.

Disclosed balance after: 0

Underlying: Common Stock · 448,160 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.

F2 · derivative.exercise_price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F7 · ownership.nature: Accel Growth Fund Associates L.L.C. ("AGFA") is the General Partner of Accel Growth Fund L.P. and has the sole voting and investment power. Andrew G. Braccia, Kevin J. Efrusy, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of AGFA and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004319 · wf-form4_155537917984177.xml · derivative · entry 31

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund IV Strategic Partners L.P.

Disclosed balance after: 0

Underlying: Common Stock · 23,108 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.

F2 · derivative.exercise_price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F6 · ownership.nature: Accel Growth Fund IV Associates L.L.C. ("AGF4A") is the General Partner of Accel Growth Fund IV Strategic Partners L.P., and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of AGF4A and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004319 · wf-form4_155537917984177.xml · derivative · entry 30

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund IV L.P., for itself and as nominee

Disclosed balance after: 0

Underlying: Common Stock · 4,061,708 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.

F2 · derivative.exercise_price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F5 · ownership.nature: Accel Growth Fund IV Associates L.L.C. ("AGF4A") is the General Partner of Accel Growth Fund IV L.P., for itself and as nominee, and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of AGF4A and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004319 · wf-form4_155537917984177.xml · derivative · entry 29

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund Investors 2016, L.L.C.

Disclosed balance after: 0

Underlying: Common Stock · 194,270 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.

F2 · derivative.exercise_price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F4 · ownership.nature: Andrew G. Braccia, Ryan J. Sweeney, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of Accel Growth Fund Investors 2016 L.L.C. and therefore share the voting and investment powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004319 · wf-form4_155537917984177.xml · derivative · entry 28

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 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: Common Stock · 31,032 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.

F2 · derivative.exercise_price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F3 · ownership.direct: Andrew G. Braccia, Kevin J. Efrusy, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of Accel Growth Fund Investors 2011 L.L.C. and therefore share the voting and investment powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004319 · wf-form4_155537917984177.xml · derivative · entry 27

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel XI Strategic Partners L.P.

Disclosed balance after: 0

Underlying: Common Stock · 154 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.

F2 · derivative.exercise_price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F11 · ownership.nature: Accel XI Associates L.L.C. ("A11A") is the General Partner of Accel XI Strategic Partners L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of A11A and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004319 · wf-form4_155537917984177.xml · derivative · entry 26

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel XI L.P.

Disclosed balance after: 0

Underlying: Common Stock · 2,060 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.

F2 · derivative.exercise_price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F10 · ownership.nature: Accel XI Associates L.L.C. ("A11A") is the General Partner of Accel XI L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of A11A and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004319 · wf-form4_155537917984177.xml · derivative · entry 25

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Investors 2013, L.L.C.

Disclosed balance after: 0

Underlying: Common Stock · 218 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.

F2 · derivative.exercise_price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F9 · ownership.nature: Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong are the Managing Members of Accel Investors 2013, L.L.C. and therefore share the voting and investment powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001628280-19-004319 · wf-form4_155537917984177.xml · derivative · entry 24

Accel Growth Fund Investors 2011 L.L.C. · CIK 0001535586 · 10% owner

Accel Growth Fund Investors 2016 L.L.C. · CIK 0001761641 · 10% owner

Accel Growth Fund IV L.P. · CIK 0001665743 · 10% owner

Accel Growth Fund IV Strategic Partners L.P. · CIK 0001673903 · 10% owner

Accel Growth Fund L.P. · CIK 0001451727 · 10% owner

Accel Growth Fund Strategic Partners L.P. · CIK 0001459726 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund Strategic Partners L.P.

Disclosed balance after: 0

Underlying: Common Stock · 44 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.

F2 · derivative.exercise_price: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.exercise_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F2 · derivative.expiration_date: The Preferred Stock converted into Common Stock on a one-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.

F8 · ownership.nature: Accel Growth Fund Associates L.L.C. ("AGFA") is the General Partner of Accel Growth Fund Strategic Partners L.P., and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, Kevin J. Efrusy and Richard P. Wong are the Managing Members of AGFA and share such powers. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.