GANDHI SAMEER K

SEC source: 0001209191-21-057622 · doc4.xml · derivative · entry 3

GANDHI SAMEER K · CIK 0001201326 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 0

Underlying: Class B Common Stock · 9,932,610 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each share of Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series F Preferred Stock, Series G Preferred Stock, and Series H Preferred Stock automatically converted into one share of Class B Common Stock immediately prior to the closing of the Issuer's initial public offering (IPO).

F1 · derivative.exercise_date: Each share of Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series F Preferred Stock, Series G Preferred Stock, and Series H Preferred Stock automatically converted into one share of Class B Common Stock immediately prior to the closing of the Issuer's initial public offering (IPO).

F1 · derivative.expiration_date: Each share of Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series F Preferred Stock, Series G Preferred Stock, and Series H Preferred Stock automatically converted into one share of Class B Common Stock immediately prior to the closing of the Issuer's initial public offering (IPO).

F2 · ownership.nature: Each of Accel Growth FII (Mauritius) Ltd, Accel India III (Mauritius) Ltd, Accel India IV (Mauritius) Limited, Accel Leaders Holdings (Mauritius) Ltd, Accel Leaders II Holdings (Mauritius) Ltd. disclaims beneficial ownership of these shares, except to the extent of any pecuniary interest therein.

F4 · ownership.nature: Shares held by Accel India III (Mauritius) Ltd. (AIN3M). AIN3M is a wholly owned subsidiary of Accel India III Holdings (Mauritius) Ltd., which is owned by Accel India III L.P. (AIN3) and Accel India III Investors L.L.C. Accel India III GP Associates Ltd. is the general partner of Accel India III Associates L.P., which is the general partner of AIN3. Sameer Gandhi, Clarence Don Clay Jr., Suzanne Gujadhur and Aslam Koomar are the directors of AIN3M and collectively make investment and voting decisions with respect to the shares held by AIN3M.

SEC source: 0001209191-21-057622 · doc4.xml · derivative · entry 2

GANDHI SAMEER K · CIK 0001201326 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 0

Underlying: Class B Common Stock · 12,736,350 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each share of Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series F Preferred Stock, Series G Preferred Stock, and Series H Preferred Stock automatically converted into one share of Class B Common Stock immediately prior to the closing of the Issuer's initial public offering (IPO).

F1 · derivative.exercise_date: Each share of Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series F Preferred Stock, Series G Preferred Stock, and Series H Preferred Stock automatically converted into one share of Class B Common Stock immediately prior to the closing of the Issuer's initial public offering (IPO).

F1 · derivative.expiration_date: Each share of Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series F Preferred Stock, Series G Preferred Stock, and Series H Preferred Stock automatically converted into one share of Class B Common Stock immediately prior to the closing of the Issuer's initial public offering (IPO).

F2 · ownership.nature: Each of Accel Growth FII (Mauritius) Ltd, Accel India III (Mauritius) Ltd, Accel India IV (Mauritius) Limited, Accel Leaders Holdings (Mauritius) Ltd, Accel Leaders II Holdings (Mauritius) Ltd. disclaims beneficial ownership of these shares, except to the extent of any pecuniary interest therein.

F4 · ownership.nature: Shares held by Accel India III (Mauritius) Ltd. (AIN3M). AIN3M is a wholly owned subsidiary of Accel India III Holdings (Mauritius) Ltd., which is owned by Accel India III L.P. (AIN3) and Accel India III Investors L.L.C. Accel India III GP Associates Ltd. is the general partner of Accel India III Associates L.P., which is the general partner of AIN3. Sameer Gandhi, Clarence Don Clay Jr., Suzanne Gujadhur and Aslam Koomar are the directors of AIN3M and collectively make investment and voting decisions with respect to the shares held by AIN3M.

SEC source: 0001209191-21-057622 · doc4.xml · derivative · entry 1

GANDHI SAMEER K · CIK 0001201326 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 0

Underlying: Class B Common Stock · 78,280 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each share of Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series F Preferred Stock, Series G Preferred Stock, and Series H Preferred Stock automatically converted into one share of Class B Common Stock immediately prior to the closing of the Issuer's initial public offering (IPO).

F1 · derivative.exercise_date: Each share of Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series F Preferred Stock, Series G Preferred Stock, and Series H Preferred Stock automatically converted into one share of Class B Common Stock immediately prior to the closing of the Issuer's initial public offering (IPO).

F1 · derivative.expiration_date: Each share of Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series F Preferred Stock, Series G Preferred Stock, and Series H Preferred Stock automatically converted into one share of Class B Common Stock immediately prior to the closing of the Issuer's initial public offering (IPO).

F2 · ownership.nature: Each of Accel Growth FII (Mauritius) Ltd, Accel India III (Mauritius) Ltd, Accel India IV (Mauritius) Limited, Accel Leaders Holdings (Mauritius) Ltd, Accel Leaders II Holdings (Mauritius) Ltd. disclaims beneficial ownership of these shares, except to the extent of any pecuniary interest therein.

F3 · ownership.nature: Shares held by Accel Growth FII (Mauritius) Ltd. (AGF2M). AGF2M is a wholly owned subsidiary of Accel Growth Holdings (Mauritius) Ltd., which is owned by Accel Growth Fund II L.P. (AGF2), Accel Growth Fund II Strategic Partners L.P. (AGF2SP) and Accel Growth Fund Investors 2012 L.L.C. Accel Growth Fund II Associates L.L.C. is the general partner of AGF2 and AGF2SP. Sameer Gandhi, Clarence Don Clay Jr., Suzanne Gujadhur and Aslam Koomar are the directors of AGF2M and collectively make investment and voting decisions with respect to the shares held by AGF2M.

SEC source: 0000950103-21-010773 · dp154581_4-gandhi.xml · nonDerivative · entry 5

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 788,199

F6 · price: This transaction was executed in multiple trades at prices ranging from $252.63 to $253.57. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-21-010773 · dp154581_4-gandhi.xml · nonDerivative · entry 4

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 788,606

F5 · price: This transaction was executed in multiple trades at prices ranging from $251.63 to $252.61. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-21-010773 · dp154581_4-gandhi.xml · nonDerivative · entry 3

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 791,569

F4 · price: This transaction was executed in multiple trades at prices ranging from $250.52 to $251.46. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-21-010773 · dp154581_4-gandhi.xml · nonDerivative · entry 2

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 795,599

F3 · price: This transaction was executed in multiple trades at prices ranging from $249.49 to $250.47. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-21-010773 · dp154581_4-gandhi.xml · nonDerivative · entry 1

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 801,420

F1 · price: This transaction was executed in multiple trades at prices ranging from $248.49 to $249.48. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-21-010066 · dp153865_4-gandhi.xml · nonDerivative · entry 1

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,580

F1 · shares: The shares represent unvested restricted stock units ("RSUs"), with the RSUs vesting in full on the earlier of (i) the one-year anniversary of the date of grant or (ii) the date of the Issuer's next annual meeting of stockholders held after the date of grant.

F2 · balance_after: Includes shares to be issued in connection with the vesting of one or more RSUs.

SEC source: 0000950103-21-005714 · dp149536_4-gandhi.xml · nonDerivative · entry 6

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 743,637

F7 · price: This transaction was executed in multiple trades at prices ranging from $213.84 to $214.49. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-21-005714 · dp149536_4-gandhi.xml · nonDerivative · entry 5

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 744,866

F6 · price: This transaction was executed in multiple trades at prices ranging from $212.63 to $213.555. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-21-005714 · dp149536_4-gandhi.xml · nonDerivative · entry 4

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 748,497

F5 · price: This transaction was executed in multiple trades at prices ranging from $211.61 to $212.57. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-21-005714 · dp149536_4-gandhi.xml · nonDerivative · entry 3

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 751,622

F4 · price: This transaction was executed in multiple trades at prices ranging from $210.35 to $210.92. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-21-005714 · dp149536_4-gandhi.xml · nonDerivative · entry 2

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 753,449

F3 · price: This transaction was executed in multiple trades at prices ranging from $209.34 to $210.28. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-21-005714 · dp149536_4-gandhi.xml · nonDerivative · entry 1

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 755,749

F1 · price: This transaction was executed in multiple trades at prices ranging from $208.31 to $209.29. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-21-005625 · dp149453_4-gandhi.xml · nonDerivative · entry 2

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · The Potomac 2011 Irrevocable Trust

Disclosed balance after: 38,000

F1 · kind: Reflects an exempt gift made by The Potomac Trust, dated 9/21/2001 of 38,000 shares of Class A common stock to The Potomac 2011 Irrevocable Trust on April 13, 2021.

F4 · ownership.nature: These shares are held by The Potomac 2011 Irrevocable Trust, of which the Reporting Person is a co-trustee. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-21-005625 · dp149453_4-gandhi.xml · nonDerivative · entry 1

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · The Potomac Trust, dated 9/21/2001

Disclosed balance after: 22,758

F1 · kind: Reflects an exempt gift made by The Potomac Trust, dated 9/21/2001 of 38,000 shares of Class A common stock to The Potomac 2011 Irrevocable Trust on April 13, 2021.

F2 · balance_after: These holdings have been updated to reflect 2,360 shares that were distributed from Accel London III L.P. and Accel London Investors 2012 L.P., in each case to the limited partners or members of the distributing entity for no consideration, representing each limited partner's or member's pro-rata interest in such shares in accordance with the exemptions afforded by Rule 16a-13 of the Securities Exchange Act of 1934, as amended.

F3 · ownership.nature: These shares are held by The Potomac Trust, dated 9/21/2001, of which the Reporting Person is a co-trustee. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-21-000406 · dp144207_4-gandhi.xml · nonDerivative · entry 8

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 690,761

F10 · price: This transaction was executed in multiple trades at prices ranging from $228.01 to $228.305. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2 · balance_after: These holdings have been updated to reflect 51,640 shares that were distributed from Accel Growth Fund II L.P., Accel Growth Fund Investors 2013 L.L.C., Accel Leaders Fund L.P. and Accel Leaders Fund Investors 2016 L.L.C., in each case to the limited partners or members of the distributing entity for no consideration, representing each limited partner's or member's pro-rata interest in such shares in accordance with the exemptions afforded by Rule 16a-13 of the Securities Exchange Act of 1934, as amended.

F3 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-21-000406 · dp144207_4-gandhi.xml · nonDerivative · entry 7

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 691,196

F9 · price: This transaction was executed in multiple trades at prices ranging from $226.70 to $227.60. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2 · balance_after: These holdings have been updated to reflect 51,640 shares that were distributed from Accel Growth Fund II L.P., Accel Growth Fund Investors 2013 L.L.C., Accel Leaders Fund L.P. and Accel Leaders Fund Investors 2016 L.L.C., in each case to the limited partners or members of the distributing entity for no consideration, representing each limited partner's or member's pro-rata interest in such shares in accordance with the exemptions afforded by Rule 16a-13 of the Securities Exchange Act of 1934, as amended.

F3 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-21-000406 · dp144207_4-gandhi.xml · nonDerivative · entry 6

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 692,496

F8 · price: This transaction was executed in multiple trades at prices ranging from $225.70 to $226.49. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2 · balance_after: These holdings have been updated to reflect 51,640 shares that were distributed from Accel Growth Fund II L.P., Accel Growth Fund Investors 2013 L.L.C., Accel Leaders Fund L.P. and Accel Leaders Fund Investors 2016 L.L.C., in each case to the limited partners or members of the distributing entity for no consideration, representing each limited partner's or member's pro-rata interest in such shares in accordance with the exemptions afforded by Rule 16a-13 of the Securities Exchange Act of 1934, as amended.

F3 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-21-000406 · dp144207_4-gandhi.xml · nonDerivative · entry 5

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 693,391

F7 · price: This transaction was executed in multiple trades at prices ranging from $224.66 to $225.65. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2 · balance_after: These holdings have been updated to reflect 51,640 shares that were distributed from Accel Growth Fund II L.P., Accel Growth Fund Investors 2013 L.L.C., Accel Leaders Fund L.P. and Accel Leaders Fund Investors 2016 L.L.C., in each case to the limited partners or members of the distributing entity for no consideration, representing each limited partner's or member's pro-rata interest in such shares in accordance with the exemptions afforded by Rule 16a-13 of the Securities Exchange Act of 1934, as amended.

F3 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-21-000406 · dp144207_4-gandhi.xml · nonDerivative · entry 4

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 699,365

F6 · price: This transaction was executed in multiple trades at prices ranging from $223.66 to $224.65. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2 · balance_after: These holdings have been updated to reflect 51,640 shares that were distributed from Accel Growth Fund II L.P., Accel Growth Fund Investors 2013 L.L.C., Accel Leaders Fund L.P. and Accel Leaders Fund Investors 2016 L.L.C., in each case to the limited partners or members of the distributing entity for no consideration, representing each limited partner's or member's pro-rata interest in such shares in accordance with the exemptions afforded by Rule 16a-13 of the Securities Exchange Act of 1934, as amended.

F3 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-21-000406 · dp144207_4-gandhi.xml · nonDerivative · entry 3

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 705,478

F5 · price: This transaction was executed in multiple trades at prices ranging from $222.66 to $223.65. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2 · balance_after: These holdings have been updated to reflect 51,640 shares that were distributed from Accel Growth Fund II L.P., Accel Growth Fund Investors 2013 L.L.C., Accel Leaders Fund L.P. and Accel Leaders Fund Investors 2016 L.L.C., in each case to the limited partners or members of the distributing entity for no consideration, representing each limited partner's or member's pro-rata interest in such shares in accordance with the exemptions afforded by Rule 16a-13 of the Securities Exchange Act of 1934, as amended.

F3 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-21-000406 · dp144207_4-gandhi.xml · nonDerivative · entry 2

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 712,033

F4 · price: This transaction was executed in multiple trades at prices ranging from $221.65 to $222.63. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2 · balance_after: These holdings have been updated to reflect 51,640 shares that were distributed from Accel Growth Fund II L.P., Accel Growth Fund Investors 2013 L.L.C., Accel Leaders Fund L.P. and Accel Leaders Fund Investors 2016 L.L.C., in each case to the limited partners or members of the distributing entity for no consideration, representing each limited partner's or member's pro-rata interest in such shares in accordance with the exemptions afforded by Rule 16a-13 of the Securities Exchange Act of 1934, as amended.

F3 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-21-000406 · dp144207_4-gandhi.xml · nonDerivative · entry 1

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 714,561

F1 · price: This transaction was executed in multiple trades at prices ranging from $220.56 to $220.92. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2 · balance_after: These holdings have been updated to reflect 51,640 shares that were distributed from Accel Growth Fund II L.P., Accel Growth Fund Investors 2013 L.L.C., Accel Leaders Fund L.P. and Accel Leaders Fund Investors 2016 L.L.C., in each case to the limited partners or members of the distributing entity for no consideration, representing each limited partner's or member's pro-rata interest in such shares in accordance with the exemptions afforded by Rule 16a-13 of the Securities Exchange Act of 1934, as amended.

F3 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-20-021744 · dp140386_4-gandhi.xml · nonDerivative · entry 5

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 663,321

F7 · price: This transaction was executed in multiple trades at prices ranging from $140.00 to $140.65. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2 · balance_after: These holdings have been updated to reflect 39,491 shares that were distributed from Accel Leaders Fund L.P. and Accel Leaders Fund Investors 2016 L.L.C., in each case to the limited partners or members of the distributing entity for no consideration, representing each limited partner's or member's pro-rata interest in such shares in accordance with the exemptions afforded by Rule 16a-13 of the Securities Exchange Act of 1934, as amended.

F3 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-20-021744 · dp140386_4-gandhi.xml · nonDerivative · entry 4

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 664,121

F6 · price: This transaction was executed in multiple trades at prices ranging from $135.36 to $136.32. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2 · balance_after: These holdings have been updated to reflect 39,491 shares that were distributed from Accel Leaders Fund L.P. and Accel Leaders Fund Investors 2016 L.L.C., in each case to the limited partners or members of the distributing entity for no consideration, representing each limited partner's or member's pro-rata interest in such shares in accordance with the exemptions afforded by Rule 16a-13 of the Securities Exchange Act of 1934, as amended.

F3 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-20-021744 · dp140386_4-gandhi.xml · nonDerivative · entry 3

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 666,067

F5 · price: This transaction was executed in multiple trades at prices ranging from $134.26 to $135.25. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2 · balance_after: These holdings have been updated to reflect 39,491 shares that were distributed from Accel Leaders Fund L.P. and Accel Leaders Fund Investors 2016 L.L.C., in each case to the limited partners or members of the distributing entity for no consideration, representing each limited partner's or member's pro-rata interest in such shares in accordance with the exemptions afforded by Rule 16a-13 of the Securities Exchange Act of 1934, as amended.

F3 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-20-021744 · dp140386_4-gandhi.xml · nonDerivative · entry 2

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 668,471

F4 · price: This transaction was executed in multiple trades at prices ranging from $133.02 to $133.93. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2 · balance_after: These holdings have been updated to reflect 39,491 shares that were distributed from Accel Leaders Fund L.P. and Accel Leaders Fund Investors 2016 L.L.C., in each case to the limited partners or members of the distributing entity for no consideration, representing each limited partner's or member's pro-rata interest in such shares in accordance with the exemptions afforded by Rule 16a-13 of the Securities Exchange Act of 1934, as amended.

F3 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-20-021744 · dp140386_4-gandhi.xml · nonDerivative · entry 1

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 668,821

F1 · price: This transaction was executed in multiple trades at prices ranging from $132.01 to $132.52. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2 · balance_after: These holdings have been updated to reflect 39,491 shares that were distributed from Accel Leaders Fund L.P. and Accel Leaders Fund Investors 2016 L.L.C., in each case to the limited partners or members of the distributing entity for no consideration, representing each limited partner's or member's pro-rata interest in such shares in accordance with the exemptions afforded by Rule 16a-13 of the Securities Exchange Act of 1934, as amended.

F3 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-20-013393 · dp132006_4-gandhi.xml · nonDerivative · entry 1

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,785

F1 · shares: The shares represent unvested restricted stock units ("RSUs"), with the RSUs vesting in full on the earlier of (i) the one-year anniversary of the date of grant or (ii) the date of the Issuer's next annual meeting of stockholders held after the date of grant.

F2 · balance_after: Includes shares to be issued in connection with the vesting of one or more RSUs.

SEC source: 0000950103-20-013355 · dp131974_4-gandhi.xml · derivative · entry 19

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Accel London Investors 2012 L.P.

Disclosed balance after: 29,532

Underlying: Class A common stock · 14,956 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.

F18 · derivative.exercise_date: Each share of Class B common stock is convertible at any time at the option of the Reporting Person into one share of Class A common stock and has no expiration date. All shares of Class B common stock will automatically convert into shares of Class A common stock upon the occurrence of certain specified events.

F18 · derivative.expiration_date: Each share of Class B common stock is convertible at any time at the option of the Reporting Person into one share of Class A common stock and has no expiration date. All shares of Class B common stock will automatically convert into shares of Class A common stock upon the occurrence of certain specified events.

F8 · ownership.nature: These shares are held by Accel London Investors 2012 L.P. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-20-013355 · dp131974_4-gandhi.xml · derivative · entry 18

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Accel London III L.P.

Disclosed balance after: 1,300,728

Underlying: Class A common stock · 658,737 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.

F18 · derivative.exercise_date: Each share of Class B common stock is convertible at any time at the option of the Reporting Person into one share of Class A common stock and has no expiration date. All shares of Class B common stock will automatically convert into shares of Class A common stock upon the occurrence of certain specified events.

F18 · derivative.expiration_date: Each share of Class B common stock is convertible at any time at the option of the Reporting Person into one share of Class A common stock and has no expiration date. All shares of Class B common stock will automatically convert into shares of Class A common stock upon the occurrence of certain specified events.

F7 · ownership.nature: These shares are held by Accel London III L.P. Accel London III Associates L.P. is the general partner of Accel London III L.P. and has sole voting and dispositive power with regard to the shares held by Accel London III L. P. Accel London III Associates L.L.C. is the general partner of Accel London III Associates L.P. and Accel London Investors 2012 L.P (together with Accel London III L.P., the "Accel London III Fund Entities"). Accel London III Associates L.L.C. has sole voting and dispositive power with regard to the shares held by the Accel London III Fund Entities. Continued in footnote (20) below.

SEC source: 0000950103-20-013355 · dp131974_4-gandhi.xml · derivative · entry 17

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Accel Growth Fund Investors 2013 L.L.C.

Disclosed balance after: 460,159

Underlying: Class A common stock · 245,225 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.

F18 · derivative.exercise_date: Each share of Class B common stock is convertible at any time at the option of the Reporting Person into one share of Class A common stock and has no expiration date. All shares of Class B common stock will automatically convert into shares of Class A common stock upon the occurrence of certain specified events.

F18 · derivative.expiration_date: Each share of Class B common stock is convertible at any time at the option of the Reporting Person into one share of Class A common stock and has no expiration date. All shares of Class B common stock will automatically convert into shares of Class A common stock upon the occurrence of certain specified events.

F4 · ownership.nature: These shares are held by Accel Growth Fund Investors 2013 L.L.C. The Reporting Person is one of six Managing Members of Accel Growth Fund Investors 2013 L.L.C. who share voting and dispositive powers over such shares. Each of such Managing Members and the Reporting Person disclaims beneficial ownership over the securities herein except to the extent of their pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Managing Member or the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-20-013355 · dp131974_4-gandhi.xml · derivative · entry 16

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

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

Disclosed balance after: 310,482

Underlying: Class A common stock · 165,459 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.

F18 · derivative.exercise_date: Each share of Class B common stock is convertible at any time at the option of the Reporting Person into one share of Class A common stock and has no expiration date. All shares of Class B common stock will automatically convert into shares of Class A common stock upon the occurrence of certain specified events.

F18 · derivative.expiration_date: Each share of Class B common stock is convertible at any time at the option of the Reporting Person into one share of Class A common stock and has no expiration date. All shares of Class B common stock will automatically convert into shares of Class A common stock upon the occurrence of certain specified events.

F3 · ownership.nature: These shares are held by Accel Growth Fund II Strategic Partners L.P.

SEC source: 0000950103-20-013355 · dp131974_4-gandhi.xml · derivative · entry 15

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

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

Disclosed balance after: 4,286,047

Underlying: Class A common stock · 2,284,089 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.

F18 · derivative.exercise_date: Each share of Class B common stock is convertible at any time at the option of the Reporting Person into one share of Class A common stock and has no expiration date. All shares of Class B common stock will automatically convert into shares of Class A common stock upon the occurrence of certain specified events.

F18 · derivative.expiration_date: Each share of Class B common stock is convertible at any time at the option of the Reporting Person into one share of Class A common stock and has no expiration date. All shares of Class B common stock will automatically convert into shares of Class A common stock upon the occurrence of certain specified events.

F2 · ownership.nature: These shares are held by Accel Growth Fund II L.P. Accel Growth Fund II Associates L.L.C. ("Accel Growth Fund II GP") is the general partner of each of Accel Growth Fund II L.P. and Accel Growth Fund II Strategic Partners L.P. (together, the "Accel Growth Fund II Entities"). Accel Growth Fund II GP has sole voting and dispositive power with regard to the shares held by the Accel Growth Fund II Entities. The Reporting Person is one of six Managing Members of Accel Growth Fund II GP, who share voting and dispositive powers over the shares held by the Accel Growth Fund II Entities. Continued in footnote (19) below.

SEC source: 0000950103-20-013355 · dp131974_4-gandhi.xml · nonDerivative · entry 12

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · The Potomac Trust, dated 9/21/2001

Disclosed balance after: 51,313

F16 · kind: Reflects shares distributed in the distributions reported herein, in each case to the limited partners or members of the applicable entity for no consideration, representing each limited partner's or member's pro-rata interest in such shares. All of the aforementioned distributions were made in accordance with the exemptions afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended.

F17 · ownership.nature: These shares are held by The Potomac Trust, dated 9/21/2001. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-20-013355 · dp131974_4-gandhi.xml · nonDerivative · entry 11

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Potomac Investments L.P. - Fund 1

Disclosed balance after: 629,630

F14 · kind: Reflects shares distributed in the distributions reported herein, in each case to the limited partners or members of the applicable entity for no consideration, representing each limited partner's or member's pro-rata interest in such shares. All of the aforementioned distributions were made in accordance with the exemptions afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended.

F15 · ownership.nature: These shares are held by Potomac Investments L.P. - Fund 1. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-20-013355 · dp131974_4-gandhi.xml · nonDerivative · entry 10

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Accel London Investors 2012 L.P.

Disclosed balance after: 0

F13 · kind: On July 2, 2020, Accel London Investors 2012 L.P. distributed, for no consideration, 14,956 shares of Class A common stock of the Issuer (the "Accel London Investors Shares") to its limited partners and to Accel London III Associates L.L.C., the general partner of Accel London Investors 2012 L.P., representing each such partner's pro rata interest in such Accel London Investors Shares. On that same date, Accel London III Associates L.L.C. distributed, for no consideration, the Accel London Investors Shares it received in the distribution by Accel London Investors 2012 L.P. to its members, representing each such member's pro rata interest in such Accel London Investors Shares. All of the aforementioned distributions were 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: These shares are held by Accel London Investors 2012 L.P. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-20-013355 · dp131974_4-gandhi.xml · nonDerivative · entry 9

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Accel London III L.P.

Disclosed balance after: 0

F12 · kind: On July 2, 2020, Accel London III L.P. distributed, for no consideration, 658,737 shares of Class A common stock of the Issuer (the "Accel London III Shares") to its limited partners and to Accel London III Associates L.P., the general partner of Accel London III L.P., representing each such partner's pro rata interest in such Accel London III Shares. On the same date, Accel London III Associates L.P. distributed, for no consideration, the Accel London III Shares it received in the distribution by Accel London III L.P. to its limited partners and to Accel London III Associates L.L.C., the general partner of Accel London III Associates L.P., representing each such partner's pro rata interest in such Accel London III Shares. Continued in footnote (21) below.

F21 · kind: Continued from footnote (12): Also on that same date, Accel London III Associates L.L.C. distributed, for no consideration, the Accel London III Shares it received in the distribution by Accel London III Associates L.P. to its members, representing each such member's pro rata interest in such Accel London III Shares. All of the aforementioned distributions were made in accordance with the exemptions afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended.

F7 · ownership.nature: These shares are held by Accel London III L.P. Accel London III Associates L.P. is the general partner of Accel London III L.P. and has sole voting and dispositive power with regard to the shares held by Accel London III L. P. Accel London III Associates L.L.C. is the general partner of Accel London III Associates L.P. and Accel London Investors 2012 L.P (together with Accel London III L.P., the "Accel London III Fund Entities"). Accel London III Associates L.L.C. has sole voting and dispositive power with regard to the shares held by the Accel London III Fund Entities. Continued in footnote (20) below.

SEC source: 0000950103-20-013355 · dp131974_4-gandhi.xml · nonDerivative · entry 8

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Accel Growth Fund Investors 2013 L.L.C.

Disclosed balance after: 0

F11 · kind: On July 2, 2020, Accel Growth Fund Investors 2013 L.L.C. distributed, for no consideration, 245,225 shares of Class A common stock of the Issuer to its members, representing each such member's pro rata interest in such shares. All of the aforementioned distributions were 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: These shares are held by Accel Growth Fund Investors 2013 L.L.C. The Reporting Person is one of six Managing Members of Accel Growth Fund Investors 2013 L.L.C. who share voting and dispositive powers over such shares. Each of such Managing Members and the Reporting Person disclaims beneficial ownership over the securities herein except to the extent of their pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Managing Member or the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-20-013355 · dp131974_4-gandhi.xml · nonDerivative · entry 7

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

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

Disclosed balance after: 0

F10 · kind: On July 2, 2020, Accel Growth Fund II Strategic Partners L.P. distributed, for no consideration, 165,459 shares of Class A common stock of the Issuer (the "Accel Growth II SP Shares") to its limited partners and to Accel Growth Fund II Associates L.L.C., the general partner of Accel Growth Fund II Strategic Partners L.P., representing each such partner's pro rata interest in such Accel Growth II SP Shares. On the same date, Accel Growth Fund II Associates L.L.C. distributed, for no consideration, the Accel Growth II SP Shares it received in the distribution by Accel Growth Fund II Strategic Partners L.P. to its members, representing each such member's pro rata interest in such Accel Growth II SP Shares. All of the aforementioned distributions were made in accordance with the exemptions afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended.

F3 · ownership.nature: These shares are held by Accel Growth Fund II Strategic Partners L.P.

SEC source: 0000950103-20-013355 · dp131974_4-gandhi.xml · nonDerivative · entry 6

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

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

Disclosed balance after: 0

F9 · kind: On July 2, 2020, Accel Growth Fund II L.P. distributed, for no consideration, 2,284,089 shares of Class A common stock of the Issuer (the "Accel Growth II Shares") to its limited partners and to Accel Growth Fund II Associates L.L.C., the general partner of Accel Growth Fund II L.P., representing each such partner's pro rata interest in such Accel Growth II Shares. On the same date, Accel Growth Fund II Associates L.L.C. distributed, for no consideration, the Accel Growth II Shares it received in the distribution by Accel Growth Fund II L.P. to its members, representing each such member's pro rata interest in such Accel Growth II Shares. All of the aforementioned distributions were 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.nature: These shares are held by Accel Growth Fund II L.P. Accel Growth Fund II Associates L.L.C. ("Accel Growth Fund II GP") is the general partner of each of Accel Growth Fund II L.P. and Accel Growth Fund II Strategic Partners L.P. (together, the "Accel Growth Fund II Entities"). Accel Growth Fund II GP has sole voting and dispositive power with regard to the shares held by the Accel Growth Fund II Entities. The Reporting Person is one of six Managing Members of Accel Growth Fund II GP, who share voting and dispositive powers over the shares held by the Accel Growth Fund II Entities. Continued in footnote (19) below.

SEC source: 0000950103-20-013355 · dp131974_4-gandhi.xml · nonDerivative · entry 5

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Accel London Investors 2012 L.P.

Disclosed balance after: 14,956

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: Class B common stock convert into Class A common stock on a one-for-one basis.

F8 · ownership.nature: These shares are held by Accel London Investors 2012 L.P. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-20-013355 · dp131974_4-gandhi.xml · nonDerivative · entry 4

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Accel London III L.P.

Disclosed balance after: 658,737

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: Class B common stock convert into Class A common stock on a one-for-one basis.

F7 · ownership.nature: These shares are held by Accel London III L.P. Accel London III Associates L.P. is the general partner of Accel London III L.P. and has sole voting and dispositive power with regard to the shares held by Accel London III L. P. Accel London III Associates L.L.C. is the general partner of Accel London III Associates L.P. and Accel London Investors 2012 L.P (together with Accel London III L.P., the "Accel London III Fund Entities"). Accel London III Associates L.L.C. has sole voting and dispositive power with regard to the shares held by the Accel London III Fund Entities. Continued in footnote (20) below.

F20 · ownership.nature: Continued from footnote (7): Each of the Reporting Person, Accel London III Associates L.P. and Accel London III Associates L.L.C. disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that either the Reporting Person, Accel London III Associates L.P. or Accel London III Associates L.L.C. is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-20-013355 · dp131974_4-gandhi.xml · nonDerivative · entry 3

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Accel Growth Fund Investors 2013 L.L.C.

Disclosed balance after: 245,225

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: Class B common stock convert into Class A common stock on a one-for-one basis.

F4 · ownership.nature: These shares are held by Accel Growth Fund Investors 2013 L.L.C. The Reporting Person is one of six Managing Members of Accel Growth Fund Investors 2013 L.L.C. who share voting and dispositive powers over such shares. Each of such Managing Members and the Reporting Person disclaims beneficial ownership over the securities herein except to the extent of their pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Managing Member or the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-20-013355 · dp131974_4-gandhi.xml · nonDerivative · entry 2

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

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

Disclosed balance after: 165,459

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: Class B common stock convert into Class A common stock on a one-for-one basis.

F3 · ownership.nature: These shares are held by Accel Growth Fund II Strategic Partners L.P.

SEC source: 0000950103-20-013355 · dp131974_4-gandhi.xml · nonDerivative · entry 1

GANDHI SAMEER K · CIK 0001201326 · Director

10b5-1 filing: Not disclosed

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

Disclosed balance after: 2,284,089

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: Class B common stock convert into Class A common stock on a one-for-one basis.

F2 · ownership.nature: These shares are held by Accel Growth Fund II L.P. Accel Growth Fund II Associates L.L.C. ("Accel Growth Fund II GP") is the general partner of each of Accel Growth Fund II L.P. and Accel Growth Fund II Strategic Partners L.P. (together, the "Accel Growth Fund II Entities"). Accel Growth Fund II GP has sole voting and dispositive power with regard to the shares held by the Accel Growth Fund II Entities. The Reporting Person is one of six Managing Members of Accel Growth Fund II GP, who share voting and dispositive powers over the shares held by the Accel Growth Fund II Entities. Continued in footnote (19) below.

F19 · ownership.nature: Continued from footnote (2): Each of such Managing Members, the Reporting Person and Accel Growth Fund II GP disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Managing Member, the Reporting Person or Accel Growth Fund II GP is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-20-011902 · dp130493_4-gandhi.xml · derivative · entry 19

GANDHI SAMEER K · CIK 0001201326 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · Accel London Investors 2012 L.P.

Disclosed balance after: 44,488

Underlying: Class A common stock · 13,320 shares

Expires not disclosed

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

F18 · derivative.exercise_date: Each share of Class B common stock is convertible at any time at the option of the Reporting Person into one share of Class A common stock and has no expiration date. All shares of Class B common stock will automatically convert into shares of Class A common stock upon the occurrence of certain specified events.

F18 · derivative.expiration_date: Each share of Class B common stock is convertible at any time at the option of the Reporting Person into one share of Class A common stock and has no expiration date. All shares of Class B common stock will automatically convert into shares of Class A common stock upon the occurrence of certain specified events.

F8 · ownership.nature: These shares are held by Accel London Investors 2012 L.P. The Reporting Person disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

SEC source: 0000950103-20-011902 · dp130493_4-gandhi.xml · derivative · entry 18

GANDHI SAMEER K · CIK 0001201326 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · Accel London III L.P.

Disclosed balance after: 1,959,465

Underlying: Class A common stock · 586,680 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.

F18 · derivative.exercise_date: Each share of Class B common stock is convertible at any time at the option of the Reporting Person into one share of Class A common stock and has no expiration date. All shares of Class B common stock will automatically convert into shares of Class A common stock upon the occurrence of certain specified events.

F18 · derivative.expiration_date: Each share of Class B common stock is convertible at any time at the option of the Reporting Person into one share of Class A common stock and has no expiration date. All shares of Class B common stock will automatically convert into shares of Class A common stock upon the occurrence of certain specified events.

F7 · ownership.nature: These shares are held by Accel London III L.P. Accel London III Associates L.P. is the general partner of Accel London III L.P. and has sole voting and dispositive power with regard to the shares held by Accel London III L. P. Accel London III Associates L.L.C. is the general partner of Accel London III Associates L.P. and Accel London Investors 2012 L.P (together with Accel London III L.P., the "Accel London III Fund Entities"). Accel London III Associates L.L.C. has sole voting and dispositive power with regard to the shares held by the Accel London III Fund Entities. Continued in footnote (20) below.