AUR

SEC source: 0001519339-26-000006 · wk-form4_1780010880.xml · nonDerivative · entry 2

Hoffman Reid · CIK 0001519339 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F1 · price: Weighted average price. This transaction was executed in multiple trades at prices ranging from $7.08 to $7.3850 inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F2 · ownership.nature: Greylock 15 GP LLC ("Greylock LLC") is the general partner of each of Greylock 15 Limited Partnership ("Greylock 15"), Greylock 15 Principals Limited Partnership ("Greylock Principals"), and Greylock 15-A Limited Partnership ("Greylock 15-A"). By virtue of being a managing member of Greylock LLC, the reporting person may be deemed a beneficial owner of the securities held by Greylock 15, Greylock Principals, and Greylock 15-A. The reporting person disclaims beneficial ownership of the securities held by Greylock 15, Greylock Principals, and/or Greylock 15-A, except to the extent of his pecuniary interest therein.

F4 · ownership.nature: Reflects securities held directly by Greylock 15-A.

SEC source: 0001519339-26-000006 · wk-form4_1780010880.xml · nonDerivative · entry 1

Hoffman Reid · CIK 0001519339 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F1 · price: Weighted average price. This transaction was executed in multiple trades at prices ranging from $7.08 to $7.3850 inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F2 · ownership.nature: Greylock 15 GP LLC ("Greylock LLC") is the general partner of each of Greylock 15 Limited Partnership ("Greylock 15"), Greylock 15 Principals Limited Partnership ("Greylock Principals"), and Greylock 15-A Limited Partnership ("Greylock 15-A"). By virtue of being a managing member of Greylock LLC, the reporting person may be deemed a beneficial owner of the securities held by Greylock 15, Greylock Principals, and Greylock 15-A. The reporting person disclaims beneficial ownership of the securities held by Greylock 15, Greylock Principals, and/or Greylock 15-A, except to the extent of his pecuniary interest therein.

F3 · ownership.nature: Reflects securities held directly by Greylock 15.

SEC source: 0001628280-26-037879 · wk-form4_1779489026.xml · nonDerivative · entry 1

Bagley Brittany · CIK 0001743490 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 444,732

F1 · shares: The reported securities are represented by restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of Class A Common Stock. 100% of the RSUs will vest on the earlier of (i) May 21, 2027 or (ii) the day prior to the date of the Issuer's next annual stockholders meeting following May 21, 2026, in each case, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001691284-26-000002 · wk-form4_1779487710.xml · nonDerivative · entry 1

Boyland Gloria R. · CIK 0001691284 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 366,972

F1 · shares: The reported securities are represented by restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of Class A Common Stock. 100% of the RSUs will vest on the earlier of (i) May 21, 2027 or (ii) the day prior to the date of the Issuer's next annual stockholders meeting following May 21, 2026, in each case, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001828108-26-000054 · wk-form4_1779487621.xml · nonDerivative · entry 1

Donahoe John J · CIK 0001321240 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 100,297

F1 · shares: The reported securities are represented by restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of Class A Common Stock. 100% of the RSUs will vest on the earlier of (i) May 21, 2027 or (ii) the day prior to the date of the Issuer's next annual stockholders meeting following May 21, 2026, in each case, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001519339-26-000004 · wk-form4_1779487888.xml · nonDerivative · entry 1

Hoffman Reid · CIK 0001519339 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 354,669

F1 · shares: The reported securities are represented by restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of Class A Common Stock. 100% of the RSUs will vest on the earlier of (i) May 21, 2027 or (ii) the day prior to the date of the Issuer's next annual stockholders meeting following May 21, 2026, in each case, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001534965-26-000006 · wk-form4_1779487481.xml · nonDerivative · entry 1

Wehner David M. · CIK 0001534965 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 164,019

F1 · shares: The reported securities are represented by restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of Class A Common Stock. 100% of the RSUs will vest on the earlier of (i) May 21, 2027 or (ii) the day prior to the date of the Issuer's next annual stockholders meeting following May 21, 2026, in each case, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001828108-26-000062 · wk-form4_1779828476.xml · nonDerivative · entry 1

Caimi Lara · CIK 0001868796 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 73,094

F1 · shares: The reported securities are represented by restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of Class A Common Stock. The reported securities consist of (i) 36,547 RSUs, 1/3 of which will vest on May 21, 2027, May 21, 2028 and May 21, 2029, respectively, and (ii) 36,547 RSUs, 100% of which will vest on the earlier of (1) May 21, 2027 or (2) the day prior to the date of the Issuer's next annual stockholders meeting following May 21, 2026, in each case, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001609637-26-000005 · wk-form4_1779487243.xml · nonDerivative · entry 1

Fisher Ossa · CIK 0001609637 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,158,406

F1 · shares: Represents (i) 49,188 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 8, 2023; (ii) 3,514 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 8, 2024; (iii) 6,833 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 24, 2025; and (iv) 10,746 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 23, 2026.

SEC source: 0001978942-26-000007 · wk-form4_1779487159.xml · nonDerivative · entry 1

Maday David · CIK 0001978942 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,954,504

F1 · shares: Represents (i) 13,626 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on June 14, 2023; (ii) 7,786 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 8, 2024; (iii) 15,141 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 24, 2025; and (iv) 17,859 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 23, 2026.

SEC source: 0001931633-26-000005 · wk-form4_1779487040.xml · nonDerivative · entry 1

WEBB SHELLEY · CIK 0001931633 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,157,109

F1 · shares: Represents (i) 27,804 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on February 18, 2025; and (ii) 13,894 shares Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 23, 2026.

SEC source: 0001519339-26-000002 · wk-form4_1779235525.xml · nonDerivative · entry 9

Hoffman Reid · CIK 0001519339 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 60,118

F7 · price: Weighted average price. This transaction was executed in multiple trades at prices ranging from $7.50 to $7.5150 inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F2 · ownership.nature: Greylock 15 GP LLC ("Greylock LLC") is the general partner of each of Greylock 15 Limited Partnership ("Greylock 15"), Greylock 15 Principals Limited Partnership ("Greylock Principals"), and Greylock 15-A Limited Partnership ("Greylock 15-A"). By virtue of being a managing member of Greylock LLC, the reporting person may be deemed a beneficial owner of the securities held by Greylock 15, Greylock Principals, and Greylock 15-A. The reporting person disclaims beneficial ownership of the securities held by Greylock 15, Greylock Principals, and/or Greylock 15-A, except to the extent of his pecuniary interest therein.

F5 · ownership.nature: Reflects securities held directly by Greylock 15 Principals.

SEC source: 0001519339-26-000002 · wk-form4_1779235525.xml · nonDerivative · entry 8

Hoffman Reid · CIK 0001519339 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 60,118

F7 · price: Weighted average price. This transaction was executed in multiple trades at prices ranging from $7.50 to $7.5150 inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F2 · ownership.nature: Greylock 15 GP LLC ("Greylock LLC") is the general partner of each of Greylock 15 Limited Partnership ("Greylock 15"), Greylock 15 Principals Limited Partnership ("Greylock Principals"), and Greylock 15-A Limited Partnership ("Greylock 15-A"). By virtue of being a managing member of Greylock LLC, the reporting person may be deemed a beneficial owner of the securities held by Greylock 15, Greylock Principals, and Greylock 15-A. The reporting person disclaims beneficial ownership of the securities held by Greylock 15, Greylock Principals, and/or Greylock 15-A, except to the extent of his pecuniary interest therein.

F4 · ownership.nature: Reflects securities held directly by Greylock 15-A.

SEC source: 0001519339-26-000002 · wk-form4_1779235525.xml · nonDerivative · entry 7

Hoffman Reid · CIK 0001519339 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 1,082,118

F7 · price: Weighted average price. This transaction was executed in multiple trades at prices ranging from $7.50 to $7.5150 inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F2 · ownership.nature: Greylock 15 GP LLC ("Greylock LLC") is the general partner of each of Greylock 15 Limited Partnership ("Greylock 15"), Greylock 15 Principals Limited Partnership ("Greylock Principals"), and Greylock 15-A Limited Partnership ("Greylock 15-A"). By virtue of being a managing member of Greylock LLC, the reporting person may be deemed a beneficial owner of the securities held by Greylock 15, Greylock Principals, and Greylock 15-A. The reporting person disclaims beneficial ownership of the securities held by Greylock 15, Greylock Principals, and/or Greylock 15-A, except to the extent of his pecuniary interest therein.

F3 · ownership.nature: Reflects securities held directly by Greylock 15.

SEC source: 0001519339-26-000002 · wk-form4_1779235525.xml · nonDerivative · entry 6

Hoffman Reid · CIK 0001519339 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 77,500

F6 · price: Weighted average price. This transaction was executed in multiple trades at prices ranging from $7.70 to $7.98 inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F2 · ownership.nature: Greylock 15 GP LLC ("Greylock LLC") is the general partner of each of Greylock 15 Limited Partnership ("Greylock 15"), Greylock 15 Principals Limited Partnership ("Greylock Principals"), and Greylock 15-A Limited Partnership ("Greylock 15-A"). By virtue of being a managing member of Greylock LLC, the reporting person may be deemed a beneficial owner of the securities held by Greylock 15, Greylock Principals, and Greylock 15-A. The reporting person disclaims beneficial ownership of the securities held by Greylock 15, Greylock Principals, and/or Greylock 15-A, except to the extent of his pecuniary interest therein.

F5 · ownership.nature: Reflects securities held directly by Greylock 15 Principals.

SEC source: 0001519339-26-000002 · wk-form4_1779235525.xml · nonDerivative · entry 5

Hoffman Reid · CIK 0001519339 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 77,500

F6 · price: Weighted average price. This transaction was executed in multiple trades at prices ranging from $7.70 to $7.98 inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F2 · ownership.nature: Greylock 15 GP LLC ("Greylock LLC") is the general partner of each of Greylock 15 Limited Partnership ("Greylock 15"), Greylock 15 Principals Limited Partnership ("Greylock Principals"), and Greylock 15-A Limited Partnership ("Greylock 15-A"). By virtue of being a managing member of Greylock LLC, the reporting person may be deemed a beneficial owner of the securities held by Greylock 15, Greylock Principals, and Greylock 15-A. The reporting person disclaims beneficial ownership of the securities held by Greylock 15, Greylock Principals, and/or Greylock 15-A, except to the extent of his pecuniary interest therein.

F4 · ownership.nature: Reflects securities held directly by Greylock 15-A.

SEC source: 0001519339-26-000002 · wk-form4_1779235525.xml · nonDerivative · entry 4

Hoffman Reid · CIK 0001519339 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 1,395,000

F6 · price: Weighted average price. This transaction was executed in multiple trades at prices ranging from $7.70 to $7.98 inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F2 · ownership.nature: Greylock 15 GP LLC ("Greylock LLC") is the general partner of each of Greylock 15 Limited Partnership ("Greylock 15"), Greylock 15 Principals Limited Partnership ("Greylock Principals"), and Greylock 15-A Limited Partnership ("Greylock 15-A"). By virtue of being a managing member of Greylock LLC, the reporting person may be deemed a beneficial owner of the securities held by Greylock 15, Greylock Principals, and Greylock 15-A. The reporting person disclaims beneficial ownership of the securities held by Greylock 15, Greylock Principals, and/or Greylock 15-A, except to the extent of his pecuniary interest therein.

F3 · ownership.nature: Reflects securities held directly by Greylock 15.

SEC source: 0001828108-26-000033 · wk-form4_1775074664.xml · nonDerivative · entry 1

Bagley Brittany · CIK 0001743490 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 408,185

F1 · shares: The reporting person previously elected to convert their cash retainer as an outside director into fully vested restricted stock units. The reported securities represent shares of the Issuer's Class A common stock determined by dividing the amount of the first quarter cash retainer the reporting person has earned as of March 31, 2026, by the average closing stock price of the Issuer's Class A common stock during the 20 trading-day period ending 5 business days before the grant date of April 1, 2026.

SEC source: 0001828108-26-000030 · wk-form4_1774906611.xml · nonDerivative · entry 1

Fisher Ossa · CIK 0001609637 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,228,687

F1 · shares: The reported securities are represented by restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock. 1/16 of the RSUs will be scheduled to vest on each of Issuer's quarterly vesting dates following February 20, 2026, rounding down to the nearest whole share, subject to the reporting person's continued service through each such date.

SEC source: 0001828108-26-000029 · wk-form4_1774906562.xml · derivative · entry 2

WEBB SHELLEY · CIK 0001931633 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 200,000

Underlying: Class A Common Stock · 200,000 shares

Expires 2036-03-23

F2 · derivative.exercise_date: One hundred percent (100%) of the shares subject to the option will be scheduled to vest on February 20, 2029, subject to the reporting person's continued service through such date.

SEC source: 0001828108-26-000029 · wk-form4_1774906562.xml · nonDerivative · entry 1

WEBB SHELLEY · CIK 0001931633 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,198,807

F1 · shares: The reported securities are represented by restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock. 1/16 of the RSUs will be scheduled to vest on each of Issuer's quarterly vesting dates following February 20, 2026, rounding down to the nearest whole share, subject to the reporting person's continued service through each such date.

SEC source: 0001828108-26-000028 · wk-form4_1774906490.xml · nonDerivative · entry 1

Maday David · CIK 0001978942 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,008,916

F1 · shares: The reported securities are represented by restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock. 1/16 of the RSUs will be scheduled to vest on each of Issuer's quarterly vesting dates following February 20, 2026, rounding down to the nearest whole share, subject to the reporting person's continued service through each such date.

SEC source: 0001828108-26-000025 · wk-form4_1773433636.xml · nonDerivative · entry 1

Wehner David M. · CIK 0001534965 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 127,472

F1 · shares: The reported securities are represented by restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of Class A Common Stock. The RSUs will vest as to 1/3 on February 27, 2027, 1/3 on February 27, 2028, and 1/3 on February 27, 2029, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001609637-26-000002 · wk-form4_1771624084.xml · nonDerivative · entry 1

Fisher Ossa · CIK 0001609637 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,791,767

F1 · shares: Represents (i) 50,448 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 8, 2023; (ii) 3,514 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 8, 2024; and (iii) 6,833 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 24, 2025.

SEC source: 0001931633-26-000002 · wk-form4_1771624190.xml · nonDerivative · entry 1

WEBB SHELLEY · CIK 0001931633 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 761,887

F1 · shares: Represents the number of shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on February 18, 2025.

SEC source: 0001978942-26-000004 · wk-form4_1771624000.xml · nonDerivative · entry 1

Maday David · CIK 0001978942 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,353,536

F1 · shares: Represents (i) 1,515 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 15, 2022; (ii) 14,702 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on June 14, 2023; (iii) 7,786 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 8, 2024; and (iv) 15,141 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 24, 2025.

SEC source: 0001828108-26-000005 · wk-form4_1767389999.xml · nonDerivative · entry 1

Bagley Brittany · CIK 0001743490 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 403,338

F1 · shares: The reporting person previously elected to convert their cash retainer for serving as an outside director into fully vested restricted stock units. The reported securities represent shares of the Issuer's Class A common stock determined by dividing the amount of the fourth quarter cash retainer the reporting person has earned as of December 31, 2025, by the average closing stock price of the Issuer's Class A common stock during the 20 trading-day period ending 5 business days before the grant date of January 2, 2026.

SEC source: 0001828108-26-000003 · wk-form4_1767389577.xml · nonDerivative · entry 4

Maday David · CIK 0001978942 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by The Maday Irrevocable Gift Trust F/B/O Blake J. Maday

Disclosed balance after: 79,874

F2 · shares: On December 31, 2025, the reporting person transferred 79,874 shares of the Issuer's Class A common stock to The Maday Irrevocable Gift Trust F/B/O Blake J. Maday (the "Irrevocable Trust F/B/O BJM") for no consideration. There was no purchase or sale of the Issuer's Class A common stock in connection with the transfer. The reporting person is a trustee of the Irrevocable Trust F/B/O BJM. The reporting person, in such capacity, may be deemed a beneficial owner of the securities held by the Irrevocable Trust F/B/O BJM.

SEC source: 0001828108-26-000003 · wk-form4_1767389577.xml · nonDerivative · entry 3

Maday David · CIK 0001978942 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,392,680

F2 · shares: On December 31, 2025, the reporting person transferred 79,874 shares of the Issuer's Class A common stock to The Maday Irrevocable Gift Trust F/B/O Blake J. Maday (the "Irrevocable Trust F/B/O BJM") for no consideration. There was no purchase or sale of the Issuer's Class A common stock in connection with the transfer. The reporting person is a trustee of the Irrevocable Trust F/B/O BJM. The reporting person, in such capacity, may be deemed a beneficial owner of the securities held by the Irrevocable Trust F/B/O BJM.

SEC source: 0001828108-26-000003 · wk-form4_1767389577.xml · nonDerivative · entry 2

Maday David · CIK 0001978942 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by The Maday Irrevocable Gift Trust F/B/O Samantha L. Maday

Disclosed balance after: 79,873

F1 · shares: On December 30, 2025, the reporting person transferred 79,873 shares of the Issuer's Class A common stock to The Maday Irrevocable Gift Trust F/B/O Samantha L. Maday (the "Irrevocable Trust F/B/O SLM") for no consideration. There was no purchase or sale of the Issuer's Class A common stock in connection with the transfer. The reporting person is a trustee of the Irrevocable Trust F/B/O SLM. The reporting person, in such capacity, may be deemed a beneficial owner of the securities held by the Irrevocable Trust F/B/O SLM.

SEC source: 0001828108-26-000003 · wk-form4_1767389577.xml · nonDerivative · entry 1

Maday David · CIK 0001978942 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,472,554

F1 · shares: On December 30, 2025, the reporting person transferred 79,873 shares of the Issuer's Class A common stock to The Maday Irrevocable Gift Trust F/B/O Samantha L. Maday (the "Irrevocable Trust F/B/O SLM") for no consideration. There was no purchase or sale of the Issuer's Class A common stock in connection with the transfer. The reporting person is a trustee of the Irrevocable Trust F/B/O SLM. The reporting person, in such capacity, may be deemed a beneficial owner of the securities held by the Irrevocable Trust F/B/O SLM.

SEC source: 0001869013-25-000004 · wk-form4_1766022522.xml · nonDerivative · entry 3

Urmson Christopher · CIK 0001869013 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by the Urmson 2022 Irrevocable Family Trust

Disclosed balance after: 755,752

F2 · shares: On December 16, 2025, 258,000 shares of the Issuer's Class A common stock were transferred from the Revocable Trust to the Irrevocable Trust for no consideration. There was no purchase or sale of the Issuer's Class A common stock in connection with the transfer. The reporting person is a trustee of the Irrevocable Trust, and certain members of the reporting person's immediate family are the sole beneficiaries of the Irrevocable Trust. The reporting person, in his capacity as a trustee of the Irrevocable Trust, may be deemed a beneficial owner of the securities held by the Irrevocable Trust.

SEC source: 0001869013-25-000004 · wk-form4_1766022522.xml · nonDerivative · entry 2

Urmson Christopher · CIK 0001869013 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by the Urmson Family Revocable Trust

Disclosed balance after: 0

F1 · shares: On December 16, 2025, 258,000 shares of the Issuer's Class A common stock were transferred from the Urmson Family Revocable Trust (the "Revocable Trust") to the Urmson 2022 Irrevocable Family Trust (the "Irrevocable Trust") for no consideration. There was no purchase or sale of the Issuer's Class A common stock in connection with the transfer. The reporting person is a trustee, settlor and beneficiary of the Revocable Trust. The reporting person, in such capacity, may be deemed a beneficial owner of the securities held by the Revocable Trust.

SEC source: 0001828108-25-000162 · wk-form4_1764166149.xml · nonDerivative · entry 2

Urmson Christopher · CIK 0001869013 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by the Urmson Family Revocable Trust

Disclosed balance after: 258,000

F1 · price: Weighted average price. This transaction was executed in multiple trades at prices ranging from $3.77 to $3.95, inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each such price.

F2 · ownership.direct: On November 25, 2025, the Urmson Family Revocable Trust (the "Revocable Trust") purchased 258,000 shares of the issuer's Class A Common Stock. The reporting person is a trustee, settlor and beneficiary of the Revocable Trust. The reporting person, in such capacity, may be deemed a beneficial owner of the securities held by the Revocable Trust.

SEC source: 0001828108-25-000159 · wk-form4_1763759859.xml · nonDerivative · entry 1

Fisher Ossa · CIK 0001609637 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,852,562

F1 · shares: Represents (i) 49,188 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 8, 2023; (ii) 3,514 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 8, 2024; and (iii) 6,833 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 24, 2025.

SEC source: 0001828108-25-000160 · wk-form4_1763759898.xml · nonDerivative · entry 1

WEBB SHELLEY · CIK 0001931633 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 791,071

F1 · shares: Represents the number of shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the initial vesting of Restricted Stock Units granted on February 18, 2025.

SEC source: 0001828108-25-000158 · wk-form4_1763759802.xml · nonDerivative · entry 1

Maday David · CIK 0001978942 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,552,427

F1 · shares: Represents (i) 1,351 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 15, 2022; (ii) 27,251 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on June 14, 2023; (iii) 7,786 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 8, 2024; and (iv) 15,141 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 24, 2025.

SEC source: 0001519339-26-000002 · wk-form4_1779235525.xml · derivative · entry 16

Hoffman Reid · CIK 0001519339 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Class A Common Stock · 352,425 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 Class B Common Stock is convertible into an equal number of shares of Class A Common Stock at any time, at the holder's election, and has no expiration date.

F1 · derivative.exercise_date: Each share of Class B Common Stock is convertible into an equal number of shares of Class A Common Stock at any time, at the holder's election, and has no expiration date.

F1 · derivative.expiration_date: Each share of Class B Common Stock is convertible into an equal number of shares of Class A Common Stock at any time, at the holder's election, and has no expiration date.

F2 · ownership.nature: Greylock 15 GP LLC ("Greylock LLC") is the general partner of each of Greylock 15 Limited Partnership ("Greylock 15"), Greylock 15 Principals Limited Partnership ("Greylock Principals"), and Greylock 15-A Limited Partnership ("Greylock 15-A"). By virtue of being a managing member of Greylock LLC, the reporting person may be deemed a beneficial owner of the securities held by Greylock 15, Greylock Principals, and Greylock 15-A. The reporting person disclaims beneficial ownership of the securities held by Greylock 15, Greylock Principals, and/or Greylock 15-A, except to the extent of his pecuniary interest therein.

F5 · ownership.nature: Reflects securities held directly by Greylock 15 Principals.

SEC source: 0001519339-26-000002 · wk-form4_1779235525.xml · derivative · entry 15

Hoffman Reid · CIK 0001519339 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Class A Common Stock · 352,425 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 Class B Common Stock is convertible into an equal number of shares of Class A Common Stock at any time, at the holder's election, and has no expiration date.

F1 · derivative.exercise_date: Each share of Class B Common Stock is convertible into an equal number of shares of Class A Common Stock at any time, at the holder's election, and has no expiration date.

F1 · derivative.expiration_date: Each share of Class B Common Stock is convertible into an equal number of shares of Class A Common Stock at any time, at the holder's election, and has no expiration date.

F2 · ownership.nature: Greylock 15 GP LLC ("Greylock LLC") is the general partner of each of Greylock 15 Limited Partnership ("Greylock 15"), Greylock 15 Principals Limited Partnership ("Greylock Principals"), and Greylock 15-A Limited Partnership ("Greylock 15-A"). By virtue of being a managing member of Greylock LLC, the reporting person may be deemed a beneficial owner of the securities held by Greylock 15, Greylock Principals, and Greylock 15-A. The reporting person disclaims beneficial ownership of the securities held by Greylock 15, Greylock Principals, and/or Greylock 15-A, except to the extent of his pecuniary interest therein.

F4 · ownership.nature: Reflects securities held directly by Greylock 15-A.

SEC source: 0001519339-26-000002 · wk-form4_1779235525.xml · derivative · entry 14

Hoffman Reid · CIK 0001519339 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Class A Common Stock · 6,343,637 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 Class B Common Stock is convertible into an equal number of shares of Class A Common Stock at any time, at the holder's election, and has no expiration date.

F1 · derivative.exercise_date: Each share of Class B Common Stock is convertible into an equal number of shares of Class A Common Stock at any time, at the holder's election, and has no expiration date.

F1 · derivative.expiration_date: Each share of Class B Common Stock is convertible into an equal number of shares of Class A Common Stock at any time, at the holder's election, and has no expiration date.

F2 · ownership.nature: Greylock 15 GP LLC ("Greylock LLC") is the general partner of each of Greylock 15 Limited Partnership ("Greylock 15"), Greylock 15 Principals Limited Partnership ("Greylock Principals"), and Greylock 15-A Limited Partnership ("Greylock 15-A"). By virtue of being a managing member of Greylock LLC, the reporting person may be deemed a beneficial owner of the securities held by Greylock 15, Greylock Principals, and Greylock 15-A. The reporting person disclaims beneficial ownership of the securities held by Greylock 15, Greylock Principals, and/or Greylock 15-A, except to the extent of his pecuniary interest therein.

F3 · ownership.nature: Reflects securities held directly by Greylock 15.

SEC source: 0001519339-26-000002 · wk-form4_1779235525.xml · nonDerivative · entry 3

Hoffman Reid · CIK 0001519339 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 352,425

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

F1 · price: Each share of Class B Common Stock is convertible into an equal number of shares of Class A Common Stock at any time, at the holder's election, and has no expiration date.

F2 · ownership.nature: Greylock 15 GP LLC ("Greylock LLC") is the general partner of each of Greylock 15 Limited Partnership ("Greylock 15"), Greylock 15 Principals Limited Partnership ("Greylock Principals"), and Greylock 15-A Limited Partnership ("Greylock 15-A"). By virtue of being a managing member of Greylock LLC, the reporting person may be deemed a beneficial owner of the securities held by Greylock 15, Greylock Principals, and Greylock 15-A. The reporting person disclaims beneficial ownership of the securities held by Greylock 15, Greylock Principals, and/or Greylock 15-A, except to the extent of his pecuniary interest therein.

F5 · ownership.nature: Reflects securities held directly by Greylock 15 Principals.

SEC source: 0001519339-26-000002 · wk-form4_1779235525.xml · nonDerivative · entry 2

Hoffman Reid · CIK 0001519339 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 352,425

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

F1 · price: Each share of Class B Common Stock is convertible into an equal number of shares of Class A Common Stock at any time, at the holder's election, and has no expiration date.

F2 · ownership.nature: Greylock 15 GP LLC ("Greylock LLC") is the general partner of each of Greylock 15 Limited Partnership ("Greylock 15"), Greylock 15 Principals Limited Partnership ("Greylock Principals"), and Greylock 15-A Limited Partnership ("Greylock 15-A"). By virtue of being a managing member of Greylock LLC, the reporting person may be deemed a beneficial owner of the securities held by Greylock 15, Greylock Principals, and Greylock 15-A. The reporting person disclaims beneficial ownership of the securities held by Greylock 15, Greylock Principals, and/or Greylock 15-A, except to the extent of his pecuniary interest therein.

F4 · ownership.nature: Reflects securities held directly by Greylock 15-A.

SEC source: 0001519339-26-000002 · wk-form4_1779235525.xml · nonDerivative · entry 1

Hoffman Reid · CIK 0001519339 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 6,343,637

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

F1 · price: Each share of Class B Common Stock is convertible into an equal number of shares of Class A Common Stock at any time, at the holder's election, and has no expiration date.

F2 · ownership.nature: Greylock 15 GP LLC ("Greylock LLC") is the general partner of each of Greylock 15 Limited Partnership ("Greylock 15"), Greylock 15 Principals Limited Partnership ("Greylock Principals"), and Greylock 15-A Limited Partnership ("Greylock 15-A"). By virtue of being a managing member of Greylock LLC, the reporting person may be deemed a beneficial owner of the securities held by Greylock 15, Greylock Principals, and Greylock 15-A. The reporting person disclaims beneficial ownership of the securities held by Greylock 15, Greylock Principals, and/or Greylock 15-A, except to the extent of his pecuniary interest therein.

F3 · ownership.nature: Reflects securities held directly by Greylock 15.

SEC source: 0001828108-25-000145 · wk-form4_1759439694.xml · nonDerivative · entry 1

Bagley Brittany · CIK 0001743490 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 398,372

F1 · price: Weighted average price. This transaction was executed in multiple trades at prices ranging from $5.3901 to $5.4000, inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each such price.

SEC source: 0001609637-25-000005 · wk-form4_1755823182.xml · nonDerivative · entry 1

Fisher Ossa · CIK 0001609637 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,912,097

F1 · shares: Represents (i) 49,188 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 8, 2023; (ii) 3,514 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 8, 2024; and (iii) 6,833 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 24, 2025.

SEC source: 0001978942-25-000004 · wk-form4_1755823078.xml · nonDerivative · entry 1

Maday David · CIK 0001978942 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,603,956

F1 · shares: Represents (i) 1,351 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 15, 2022; (ii) 27,251 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on June 14, 2023; (iii) 7,787 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 8, 2024; and (iv) 15,141 shares of Class A common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the quarterly vesting of Restricted Stock Units granted on March 24, 2025.

SEC source: 0001828108-25-000141 · wk-form4_1754572796.xml · nonDerivative · entry 2

Donahoe John J · CIK 0001321240 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by the Donahoe Living Trust

Disclosed balance after: 162,337

F1 · price: Weighted average price. This transaction was executed in multiple trades at prices ranging from $6.02 to $6.17, inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each such price.

F2 · ownership.direct: On August 6, 2025, the Donahoe Living Trust (the "Trust") purchased 162,337 shares of the issuer's Class A Common Stock. The reporting person is a trustee and settlor of the Trust, and during his lifetime, a beneficiary of the Trust. The reporting person, in his capacity as a trustee and settlor of the Trust, may be deemed a beneficial owner of the securities held by the Trust.

SEC source: 0001828108-25-000126 · wk-form4_1749500600.xml · nonDerivative · entry 1

Boyland Gloria R. · CIK 0001691284 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 330,425

F1 · price: Weighted average price. This transaction was executed in multiple trades at prices ranging from $5.9100 to $5.9250, inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each such price.

SEC source: 0001828108-25-000124 · wk-form4_1748637164.xml · nonDerivative · entry 1

Donahoe John J · CIK 0001321240 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 63,750

F1 · shares: The reported securities are represented by restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of Class A Common Stock. The reported securities consist of (i) 31,875 RSUs, 1/3 of which will vest on May 22, 2026, May 22, 2027 and May 22, 2028, respectively, and (ii) 31,875 RSUs, 100% of which will vest on the earlier of (1) May 22, 2026 or (2) the day prior to the date of the Issuer's next annual stockholders meeting following May 22, 2025, in each case, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001828108-25-000111 · wk-form4_1747945635.xml · nonDerivative · entry 1

Bhatt Shailen · CIK 0002050389 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 64,131

F1 · shares: The reported securities are represented by restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of Class A Common Stock. 100% of the RSUs will vest on the earlier of (i) May 22, 2026 or (ii) the day prior to the date of the Issuer's next annual stockholders meeting following May 22, 2025, in each case, subject to the reporting person's continued service through the applicable vesting date.