ACVA

SEC source: 0001628280-24-040272 · wk-form4_1726181360.xml · nonDerivative · entry 3

Mehta Vikas · CIK 0001852328 · Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 432,457

F2 · kind: Shares sold pursuant to a Rule 10b5-1 trading plan enter into on May 24, 2024

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.95 to $19.40 inclusive. The Reporting Person undertakes to provide to 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 at each separate price within the range set forth in this footnote.

SEC source: 0001628280-24-040272 · wk-form4_1726181360.xml · nonDerivative · entry 2

Mehta Vikas · CIK 0001852328 · Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 586,781

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 at any time at the option of the reporting person into one share of Class A Common Stock. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the reporting person; and (3) the final conversion date, defined as the earlier of (a) the last trading day of the fiscal quarter immediately following the tenth anniversary of the effective date of the Issuer's tenth amended and restated certificate of incorporation; (b) the last trading day of the fiscal quarter during which the then-outstanding shares of Class B Common Stock first represent less than 5% of the aggregate number of then-outstanding shares of Class A Common Stock and Class B Common Stock.

SEC source: 0001628280-24-040272 · wk-form4_1726181360.xml · nonDerivative · entry 1

Mehta Vikas · CIK 0001852328 · Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 539,957

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 at any time at the option of the reporting person into one share of Class A Common Stock. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the reporting person; and (3) the final conversion date, defined as the earlier of (a) the last trading day of the fiscal quarter immediately following the tenth anniversary of the effective date of the Issuer's tenth amended and restated certificate of incorporation; (b) the last trading day of the fiscal quarter during which the then-outstanding shares of Class B Common Stock first represent less than 5% of the aggregate number of then-outstanding shares of Class A Common Stock and Class B Common Stock.

SEC source: 0000950170-24-105631 · ownership.xml · nonDerivative · entry 2

GOODMAN ROBERT P · CIK 0001252022 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

F1 · kind: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F3 · shares: On September 9, 2024 BVP IX, BVP IX Inst, and 15 Angels sold 268,248, 214,908, and 4,444 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $19.16. These shares were sold in multiple transactions at prices ranging from $18.50 to $19.30. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F3 · price: On September 9, 2024 BVP IX, BVP IX Inst, and 15 Angels sold 268,248, 214,908, and 4,444 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $19.16. These shares were sold in multiple transactions at prices ranging from $18.50 to $19.30. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F3 · ownership.nature: On September 9, 2024 BVP IX, BVP IX Inst, and 15 Angels sold 268,248, 214,908, and 4,444 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $19.16. These shares were sold in multiple transactions at prices ranging from $18.50 to $19.30. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F6 · ownership.nature: The shares reported are held by NB Group, LLC ("NB Group"). NB Group is controlled by the Reporting Person, and the Reporting Person disclaims beneficial ownership of the shares held by this entity, except to the extent of his pecuniary interest therein, if any.

SEC source: 0000950170-24-105631 · ownership.xml · nonDerivative · entry 1

GOODMAN ROBERT P · CIK 0001252022 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

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 · kind: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F1 · shares: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F2 · price: Represents 268,248 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX L.P. ("BVP IX"), 214,908 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX Institutional L.P. ("BVP IX Inst"), and 4,444 shares converted from Class B Common Stock to Class A Common Stock by 15 Angels III LLC. ("15 Angels" and together with BVP IX and BVP IX Inst, the "BVP IX Funds")

F1 · ownership.nature: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F2 · ownership.nature: Represents 268,248 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX L.P. ("BVP IX"), 214,908 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX Institutional L.P. ("BVP IX Inst"), and 4,444 shares converted from Class B Common Stock to Class A Common Stock by 15 Angels III LLC. ("15 Angels" and together with BVP IX and BVP IX Inst, the "BVP IX Funds")

SEC source: 0001628280-24-039687 · wk-form4_1725653462.xml · derivative · entry 5

KAMERICK EILEEN A · CIK 0001044530 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 25,000 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 at any time at the option of the reporting person into one share of Class A Common Stock. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the reporting person; and (3) the final conversion date, defined as the earlier of (a) the last trading day of the fiscal quarter immediately following the tenth anniversary of the effective date of the Issuer's tenth amended and restated certificate of incorporation; (b) the last trading day of the fiscal quarter during which the then-outstanding shares of Class B Common Stock first represent less than 5% of the aggregate number of then-outstanding shares of Class A Common Stock and Class B Common Stock.

F1 · 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. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the reporting person; and (3) the final conversion date, defined as the earlier of (a) the last trading day of the fiscal quarter immediately following the tenth anniversary of the effective date of the Issuer's tenth amended and restated certificate of incorporation; (b) the last trading day of the fiscal quarter during which the then-outstanding shares of Class B Common Stock first represent less than 5% of the aggregate number of then-outstanding shares of Class A Common Stock and Class B Common Stock.

F1 · 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. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the reporting person; and (3) the final conversion date, defined as the earlier of (a) the last trading day of the fiscal quarter immediately following the tenth anniversary of the effective date of the Issuer's tenth amended and restated certificate of incorporation; (b) the last trading day of the fiscal quarter during which the then-outstanding shares of Class B Common Stock first represent less than 5% of the aggregate number of then-outstanding shares of Class A Common Stock and Class B Common Stock.

SEC source: 0001628280-24-039687 · wk-form4_1725653462.xml · derivative · entry 4

KAMERICK EILEEN A · CIK 0001044530 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,000

Underlying: Class A Common Stock · 25,000 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 at any time at the option of the reporting person into one share of Class A Common Stock. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the reporting person; and (3) the final conversion date, defined as the earlier of (a) the last trading day of the fiscal quarter immediately following the tenth anniversary of the effective date of the Issuer's tenth amended and restated certificate of incorporation; (b) the last trading day of the fiscal quarter during which the then-outstanding shares of Class B Common Stock first represent less than 5% of the aggregate number of then-outstanding shares of Class A Common Stock and Class B Common Stock.

F1 · 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. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the reporting person; and (3) the final conversion date, defined as the earlier of (a) the last trading day of the fiscal quarter immediately following the tenth anniversary of the effective date of the Issuer's tenth amended and restated certificate of incorporation; (b) the last trading day of the fiscal quarter during which the then-outstanding shares of Class B Common Stock first represent less than 5% of the aggregate number of then-outstanding shares of Class A Common Stock and Class B Common Stock.

F1 · 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. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the reporting person; and (3) the final conversion date, defined as the earlier of (a) the last trading day of the fiscal quarter immediately following the tenth anniversary of the effective date of the Issuer's tenth amended and restated certificate of incorporation; (b) the last trading day of the fiscal quarter during which the then-outstanding shares of Class B Common Stock first represent less than 5% of the aggregate number of then-outstanding shares of Class A Common Stock and Class B Common Stock.

SEC source: 0001628280-24-039687 · wk-form4_1725653462.xml · derivative · entry 3

KAMERICK EILEEN A · CIK 0001044530 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 80,984

Underlying: Class B Common Stock · 25,000 shares

Expires 2030-03-04

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.

F3 · derivative.exercise_date: The stock options vested or shall vest in twelve (12) equal quarterly installments, with the first vesting having occurred on June 5, 2020, subject to the Reporting Person's continuous service through each such date.

SEC source: 0001628280-24-039687 · wk-form4_1725653462.xml · nonDerivative · entry 2

KAMERICK EILEEN A · CIK 0001044530 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,239

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.76 to $17.98 inclusive. The Reporting Person undertakes to provide to 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 at each separate price within the range set forth in this footnote.

SEC source: 0001628280-24-039687 · wk-form4_1725653462.xml · nonDerivative · entry 1

KAMERICK EILEEN A · CIK 0001044530 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,239

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 at any time at the option of the reporting person into one share of Class A Common Stock. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the reporting person; and (3) the final conversion date, defined as the earlier of (a) the last trading day of the fiscal quarter immediately following the tenth anniversary of the effective date of the Issuer's tenth amended and restated certificate of incorporation; (b) the last trading day of the fiscal quarter during which the then-outstanding shares of Class B Common Stock first represent less than 5% of the aggregate number of then-outstanding shares of Class A Common Stock and Class B Common Stock.

SEC source: 0001628280-24-039693 · wk-form4_1725653756.xml · nonDerivative · entry 5

Peer Andrew · CIK 0002030941 · VP, Corporate Controller

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 66,352

F6 · kind: Shares sold pursuant to a Rule 10b5-1 trading plan enter into on June 13, 2024.

F7 · price: These shares were sold in a single transaction for $18.14 per share

SEC source: 0000950170-24-103716 · ownership.xml · nonDerivative · entry 3

GOODMAN ROBERT P · CIK 0001252022 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

F4 · kind: On September 3, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 4,400, 7,700, and 300 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.50. These shares were sold in multiple transactions at prices ranging from $18.50 to $18.52. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F4 · shares: On September 3, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 4,400, 7,700, and 300 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.50. These shares were sold in multiple transactions at prices ranging from $18.50 to $18.52. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F4 · price: On September 3, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 4,400, 7,700, and 300 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.50. These shares were sold in multiple transactions at prices ranging from $18.50 to $18.52. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F4 · ownership.nature: On September 3, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 4,400, 7,700, and 300 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.50. These shares were sold in multiple transactions at prices ranging from $18.50 to $18.52. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F7 · ownership.nature: The shares reported are held by NB Group, LLC ("NB Group"). NB Group is controlled by the Reporting Person, and the Reporting Person disclaims beneficial ownership of the shares held by this entity, except to the extent of his pecuniary interest therein, if any.

SEC source: 0000950170-24-103716 · ownership.xml · derivative · entry 8

GOODMAN ROBERT P · CIK 0001252022 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Class B Common Stock · 0 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 without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F2 · shares: Represents 57,365 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX L.P. ("BVP IX"), 50,132 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX Institutional L.P. ("BVP IX Inst"), and 1,177 shares converted from Class B Common Stock to Class A Common Stock by 15 Angels III LLC. ("15 Angels" and together with BVP IX and BVP IX Inst, the "BVP IX Funds")

F1 · price: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F1 · derivative.exercise_date: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F1 · derivative.expiration_date: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F2 · derivative.underlying_shares: Represents 57,365 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX L.P. ("BVP IX"), 50,132 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX Institutional L.P. ("BVP IX Inst"), and 1,177 shares converted from Class B Common Stock to Class A Common Stock by 15 Angels III LLC. ("15 Angels" and together with BVP IX and BVP IX Inst, the "BVP IX Funds")

F6 · balance_after: The Reporting Person is a director of Deer IX & Co. Ltd. ("Deer IX Ltd.") which is the general partner of Deer IX & Co. L.P. ("Deer IX LP"), which is the general partner of the BVP IX Funds The Reporting Person disclaims beneficial ownership of the securities held by BVP IX Funds, except to the extent of his pecuniary interest, if any, in such securities by virtue of his interest in Deer IX Ltd. and Deer IX LP and his indirect interest in the BVP IX Funds. This report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities.

F9 · balance_after: As of the date hereof, BVP IX, BVP IX Inst, and 15 Angels hold 2,093,038, 1,672,667, and 34,452 shares of Class B Stock, respectively.

F6 · ownership.nature: The Reporting Person is a director of Deer IX & Co. Ltd. ("Deer IX Ltd.") which is the general partner of Deer IX & Co. L.P. ("Deer IX LP"), which is the general partner of the BVP IX Funds The Reporting Person disclaims beneficial ownership of the securities held by BVP IX Funds, except to the extent of his pecuniary interest, if any, in such securities by virtue of his interest in Deer IX Ltd. and Deer IX LP and his indirect interest in the BVP IX Funds. This report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities.

SEC source: 0000950170-24-103716 · ownership.xml · nonDerivative · entry 2

GOODMAN ROBERT P · CIK 0001252022 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

F1 · kind: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F3 · shares: On August 30, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 52.965, 42,432, and 877 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.60. These shares were sold in multiple transactions at prices ranging from $18.50 to $18.73. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F3 · price: On August 30, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 52.965, 42,432, and 877 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.60. These shares were sold in multiple transactions at prices ranging from $18.50 to $18.73. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F3 · ownership.nature: On August 30, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 52.965, 42,432, and 877 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.60. These shares were sold in multiple transactions at prices ranging from $18.50 to $18.73. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F7 · ownership.nature: The shares reported are held by NB Group, LLC ("NB Group"). NB Group is controlled by the Reporting Person, and the Reporting Person disclaims beneficial ownership of the shares held by this entity, except to the extent of his pecuniary interest therein, if any.

SEC source: 0000950170-24-103716 · ownership.xml · nonDerivative · entry 1

GOODMAN ROBERT P · CIK 0001252022 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

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 · kind: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F1 · shares: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F2 · price: Represents 57,365 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX L.P. ("BVP IX"), 50,132 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX Institutional L.P. ("BVP IX Inst"), and 1,177 shares converted from Class B Common Stock to Class A Common Stock by 15 Angels III LLC. ("15 Angels" and together with BVP IX and BVP IX Inst, the "BVP IX Funds")

F1 · ownership.nature: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F2 · ownership.nature: Represents 57,365 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX L.P. ("BVP IX"), 50,132 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX Institutional L.P. ("BVP IX Inst"), and 1,177 shares converted from Class B Common Stock to Class A Common Stock by 15 Angels III LLC. ("15 Angels" and together with BVP IX and BVP IX Inst, the "BVP IX Funds")

SEC source: 0000950170-24-105631 · ownership.xml · derivative · entry 7

GOODMAN ROBERT P · CIK 0001252022 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Class B Common Stock · 0 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 without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F2 · shares: Represents 268,248 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX L.P. ("BVP IX"), 214,908 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX Institutional L.P. ("BVP IX Inst"), and 4,444 shares converted from Class B Common Stock to Class A Common Stock by 15 Angels III LLC. ("15 Angels" and together with BVP IX and BVP IX Inst, the "BVP IX Funds")

F1 · price: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F1 · derivative.exercise_date: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F1 · derivative.expiration_date: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F2 · derivative.underlying_shares: Represents 268,248 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX L.P. ("BVP IX"), 214,908 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX Institutional L.P. ("BVP IX Inst"), and 4,444 shares converted from Class B Common Stock to Class A Common Stock by 15 Angels III LLC. ("15 Angels" and together with BVP IX and BVP IX Inst, the "BVP IX Funds")

F5 · balance_after: The Reporting Person is a director of Deer IX & Co. Ltd. ("Deer IX Ltd.") which is the general partner of Deer IX & Co. L.P. ("Deer IX LP"), which is the general partner of the BVP IX Funds The Reporting Person disclaims beneficial ownership of the securities held by BVP IX Funds, except to the extent of his pecuniary interest, if any, in such securities by virtue of his interest in Deer IX Ltd. and Deer IX LP and his indirect interest in the BVP IX Funds. This report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities.

F8 · balance_after: As of the date hereof, BVP IX, BVP IX Inst, and 15 Angels hold 1,842,790, 1,457, 759, and 30,008 shares of Class B Stock, respectively.

F5 · ownership.nature: The Reporting Person is a director of Deer IX & Co. Ltd. ("Deer IX Ltd.") which is the general partner of Deer IX & Co. L.P. ("Deer IX LP"), which is the general partner of the BVP IX Funds The Reporting Person disclaims beneficial ownership of the securities held by BVP IX Funds, except to the extent of his pecuniary interest, if any, in such securities by virtue of his interest in Deer IX Ltd. and Deer IX LP and his indirect interest in the BVP IX Funds. This report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities.

SEC source: 0000950170-24-101981 · ownership.xml · nonDerivative · entry 4

GOODMAN ROBERT P · CIK 0001252022 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

F5 · kind: On August 29, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 6,582, 5,274 and109 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.51. These shares were sold in multiple transactions at prices ranging from $18.50 to $18.62. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F5 · shares: On August 29, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 6,582, 5,274 and109 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.51. These shares were sold in multiple transactions at prices ranging from $18.50 to $18.62. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F5 · price: On August 29, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 6,582, 5,274 and109 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.51. These shares were sold in multiple transactions at prices ranging from $18.50 to $18.62. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F5 · ownership.nature: On August 29, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 6,582, 5,274 and109 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.51. These shares were sold in multiple transactions at prices ranging from $18.50 to $18.62. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F7 · ownership.nature: The Reporting Person is a director of Deer IX & Co. Ltd. ("Deer IX Ltd.") which is the general partner of Deer IX & Co. L.P. ("Deer IX LP"), which is the general partner of the BVP IX Funds The Reporting Person disclaims beneficial ownership of the securities held by BVP IX Funds, except to the extent of his pecuniary interest, if any, in such securities by virtue of his interest in Deer IX Ltd. and Deer IX LP and his indirect interest in the BVP IX Funds. This report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities.

SEC source: 0000950170-24-101981 · ownership.xml · nonDerivative · entry 3

GOODMAN ROBERT P · CIK 0001252022 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

F4 · kind: On August 28, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 14,556, 11,661, and 241 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.50. These shares were sold in multiple transactions at prices ranging from $18.50 to $18.52. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F4 · shares: On August 28, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 14,556, 11,661, and 241 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.50. These shares were sold in multiple transactions at prices ranging from $18.50 to $18.52. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F4 · price: On August 28, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 14,556, 11,661, and 241 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.50. These shares were sold in multiple transactions at prices ranging from $18.50 to $18.52. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F4 · ownership.nature: On August 28, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 14,556, 11,661, and 241 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.50. These shares were sold in multiple transactions at prices ranging from $18.50 to $18.52. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F7 · ownership.nature: The Reporting Person is a director of Deer IX & Co. Ltd. ("Deer IX Ltd.") which is the general partner of Deer IX & Co. L.P. ("Deer IX LP"), which is the general partner of the BVP IX Funds The Reporting Person disclaims beneficial ownership of the securities held by BVP IX Funds, except to the extent of his pecuniary interest, if any, in such securities by virtue of his interest in Deer IX Ltd. and Deer IX LP and his indirect interest in the BVP IX Funds. This report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities.

SEC source: 0000950170-24-101981 · ownership.xml · derivative · entry 9

GOODMAN ROBERT P · CIK 0001252022 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Class B Common Stock · 0 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 without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F2 · shares: Represents 124,406 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX L.P. ("BVP IX"), 99,669 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX Institutional L.P. ("BVP IX Inst"), and 2,061 shares converted from Class B Common Stock to Class A Common Stock by 15 Angels III LLC. ("15 Angels" and together with BVP IX and BVP IX Inst, the "BVP IX Funds")

F1 · price: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F1 · derivative.exercise_date: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F1 · derivative.expiration_date: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F2 · derivative.underlying_shares: Represents 124,406 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX L.P. ("BVP IX"), 99,669 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX Institutional L.P. ("BVP IX Inst"), and 2,061 shares converted from Class B Common Stock to Class A Common Stock by 15 Angels III LLC. ("15 Angels" and together with BVP IX and BVP IX Inst, the "BVP IX Funds")

F7 · balance_after: The Reporting Person is a director of Deer IX & Co. Ltd. ("Deer IX Ltd.") which is the general partner of Deer IX & Co. L.P. ("Deer IX LP"), which is the general partner of the BVP IX Funds The Reporting Person disclaims beneficial ownership of the securities held by BVP IX Funds, except to the extent of his pecuniary interest, if any, in such securities by virtue of his interest in Deer IX Ltd. and Deer IX LP and his indirect interest in the BVP IX Funds. This report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities.

F10 · balance_after: As of the date hereof, BVP IX, BVP IX Inst, and 15 Angels hold 2,195,200, 1,758,687 and 36,370 shares of Class B Stock, respectively.

F7 · ownership.nature: The Reporting Person is a director of Deer IX & Co. Ltd. ("Deer IX Ltd.") which is the general partner of Deer IX & Co. L.P. ("Deer IX LP"), which is the general partner of the BVP IX Funds The Reporting Person disclaims beneficial ownership of the securities held by BVP IX Funds, except to the extent of his pecuniary interest, if any, in such securities by virtue of his interest in Deer IX Ltd. and Deer IX LP and his indirect interest in the BVP IX Funds. This report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities.

SEC source: 0000950170-24-101981 · ownership.xml · nonDerivative · entry 2

GOODMAN ROBERT P · CIK 0001252022 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

F1 · kind: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F3 · shares: On August 27, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 103,268, 82,743, and 823 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.64. These shares were sold in multiple transactions at prices ranging from $18.50 to $19.03. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F3 · price: On August 27, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 103,268, 82,743, and 823 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.64. These shares were sold in multiple transactions at prices ranging from $18.50 to $19.03. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F3 · ownership.nature: On August 27, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 103,268, 82,743, and 823 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.64. These shares were sold in multiple transactions at prices ranging from $18.50 to $19.03. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F7 · ownership.nature: The Reporting Person is a director of Deer IX & Co. Ltd. ("Deer IX Ltd.") which is the general partner of Deer IX & Co. L.P. ("Deer IX LP"), which is the general partner of the BVP IX Funds The Reporting Person disclaims beneficial ownership of the securities held by BVP IX Funds, except to the extent of his pecuniary interest, if any, in such securities by virtue of his interest in Deer IX Ltd. and Deer IX LP and his indirect interest in the BVP IX Funds. This report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities.

SEC source: 0000950170-24-101981 · ownership.xml · nonDerivative · entry 1

GOODMAN ROBERT P · CIK 0001252022 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

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 · kind: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F1 · shares: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F2 · price: Represents 124,406 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX L.P. ("BVP IX"), 99,669 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX Institutional L.P. ("BVP IX Inst"), and 2,061 shares converted from Class B Common Stock to Class A Common Stock by 15 Angels III LLC. ("15 Angels" and together with BVP IX and BVP IX Inst, the "BVP IX Funds")

F1 · ownership.nature: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F2 · ownership.nature: Represents 124,406 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX L.P. ("BVP IX"), 99,669 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX Institutional L.P. ("BVP IX Inst"), and 2,061 shares converted from Class B Common Stock to Class A Common Stock by 15 Angels III LLC. ("15 Angels" and together with BVP IX and BVP IX Inst, the "BVP IX Funds")

SEC source: 0001628280-24-038544 · wk-form4_1724791020.xml · derivative · entry 10

Mehta Vikas · CIK 0001852328 · Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 175,646

Underlying: Class A Common Stock · 6,980 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 at any time at the option of the reporting person into one share of Class A Common Stock. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the reporting person; and (3) the final conversion date, defined as the earlier of (a) the last trading day of the fiscal quarter immediately following the tenth anniversary of the effective date of the Issuer's tenth amended and restated certificate of incorporation; (b) the last trading day of the fiscal quarter during which the then-outstanding shares of Class B Common Stock first represent less than 5% of the aggregate number of then-outstanding shares of Class A Common Stock and Class B Common Stock.

F1 · 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. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the reporting person; and (3) the final conversion date, defined as the earlier of (a) the last trading day of the fiscal quarter immediately following the tenth anniversary of the effective date of the Issuer's tenth amended and restated certificate of incorporation; (b) the last trading day of the fiscal quarter during which the then-outstanding shares of Class B Common Stock first represent less than 5% of the aggregate number of then-outstanding shares of Class A Common Stock and Class B Common Stock.

F1 · 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. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the reporting person; and (3) the final conversion date, defined as the earlier of (a) the last trading day of the fiscal quarter immediately following the tenth anniversary of the effective date of the Issuer's tenth amended and restated certificate of incorporation; (b) the last trading day of the fiscal quarter during which the then-outstanding shares of Class B Common Stock first represent less than 5% of the aggregate number of then-outstanding shares of Class A Common Stock and Class B Common Stock.

F6 · balance_after: Includes shares previously reported as restricted stock units.

SEC source: 0001628280-24-038544 · wk-form4_1724791020.xml · nonDerivative · entry 5

Mehta Vikas · CIK 0001852328 · Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 467,090

F2 · kind: Shares sold pursuant to a Rule 10b5-1 trading plan enter into on May 24, 2024

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.96 to $19.31 inclusive. The Reporting Person undertakes to provide to 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 at each separate price within the range set forth in this footnote.

SEC source: 0001628280-24-038544 · wk-form4_1724791020.xml · nonDerivative · entry 4

Mehta Vikas · CIK 0001852328 · Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 475,485

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 at any time at the option of the reporting person into one share of Class A Common Stock. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the reporting person; and (3) the final conversion date, defined as the earlier of (a) the last trading day of the fiscal quarter immediately following the tenth anniversary of the effective date of the Issuer's tenth amended and restated certificate of incorporation; (b) the last trading day of the fiscal quarter during which the then-outstanding shares of Class B Common Stock first represent less than 5% of the aggregate number of then-outstanding shares of Class A Common Stock and Class B Common Stock.

SEC source: 0000950170-24-100698 · ownership.xml · nonDerivative · entry 4

GOODMAN ROBERT P · CIK 0001252022 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

F5 · kind: On August 26, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 200,323, 160,489, 3,319 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $19.46. These shares were sold in multiple transactions at prices ranging from $19.00 to $19.85. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F5 · shares: On August 26, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 200,323, 160,489, 3,319 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $19.46. These shares were sold in multiple transactions at prices ranging from $19.00 to $19.85. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F5 · price: On August 26, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 200,323, 160,489, 3,319 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $19.46. These shares were sold in multiple transactions at prices ranging from $19.00 to $19.85. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F5 · ownership.nature: On August 26, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 200,323, 160,489, 3,319 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $19.46. These shares were sold in multiple transactions at prices ranging from $19.00 to $19.85. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F7 · ownership.nature: The Reporting Person is a director of Deer IX & Co. Ltd. ("Deer IX Ltd.") which is the general partner of Deer IX & Co. L.P. ("Deer IX LP"), which is the general partner of the BVP IX Funds The Reporting Person disclaims beneficial ownership of the securities held by BVP IX Funds, except to the extent of his pecuniary interest, if any, in such securities by virtue of his interest in Deer IX Ltd. and Deer IX LP and his indirect interest in the BVP IX Funds. This report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities.

SEC source: 0001415889-24-022143 · form4-08232024_090834.xml · nonDerivative · entry 8

Hirsch Brian · CIK 0001851605 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,239

F10 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.40 to $18.81 inclusive. The Reporting Person undertakes to provide to 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 in this footnote.

SEC source: 0000950170-24-100698 · ownership.xml · nonDerivative · entry 3

GOODMAN ROBERT P · CIK 0001252022 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

F4 · kind: On August 23, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 187,583, 150,282, 3,108 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.69. These shares were sold in multiple transactions at prices ranging from $18.32 to $18.95. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F4 · shares: On August 23, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 187,583, 150,282, 3,108 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.69. These shares were sold in multiple transactions at prices ranging from $18.32 to $18.95. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F4 · price: On August 23, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 187,583, 150,282, 3,108 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.69. These shares were sold in multiple transactions at prices ranging from $18.32 to $18.95. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F4 · ownership.nature: On August 23, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 187,583, 150,282, 3,108 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.69. These shares were sold in multiple transactions at prices ranging from $18.32 to $18.95. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F7 · ownership.nature: The Reporting Person is a director of Deer IX & Co. Ltd. ("Deer IX Ltd.") which is the general partner of Deer IX & Co. L.P. ("Deer IX LP"), which is the general partner of the BVP IX Funds The Reporting Person disclaims beneficial ownership of the securities held by BVP IX Funds, except to the extent of his pecuniary interest, if any, in such securities by virtue of his interest in Deer IX Ltd. and Deer IX LP and his indirect interest in the BVP IX Funds. This report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities.

SEC source: 0001628280-24-038544 · wk-form4_1724791020.xml · derivative · entry 9

Mehta Vikas · CIK 0001852328 · Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 182,626

Underlying: Class A Common Stock · 60,954 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 at any time at the option of the reporting person into one share of Class A Common Stock. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the reporting person; and (3) the final conversion date, defined as the earlier of (a) the last trading day of the fiscal quarter immediately following the tenth anniversary of the effective date of the Issuer's tenth amended and restated certificate of incorporation; (b) the last trading day of the fiscal quarter during which the then-outstanding shares of Class B Common Stock first represent less than 5% of the aggregate number of then-outstanding shares of Class A Common Stock and Class B Common Stock.

F1 · 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. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the reporting person; and (3) the final conversion date, defined as the earlier of (a) the last trading day of the fiscal quarter immediately following the tenth anniversary of the effective date of the Issuer's tenth amended and restated certificate of incorporation; (b) the last trading day of the fiscal quarter during which the then-outstanding shares of Class B Common Stock first represent less than 5% of the aggregate number of then-outstanding shares of Class A Common Stock and Class B Common Stock.

F1 · 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. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the reporting person; and (3) the final conversion date, defined as the earlier of (a) the last trading day of the fiscal quarter immediately following the tenth anniversary of the effective date of the Issuer's tenth amended and restated certificate of incorporation; (b) the last trading day of the fiscal quarter during which the then-outstanding shares of Class B Common Stock first represent less than 5% of the aggregate number of then-outstanding shares of Class A Common Stock and Class B Common Stock.

F6 · balance_after: Includes shares previously reported as restricted stock units.

SEC source: 0001628280-24-038544 · wk-form4_1724791020.xml · derivative · entry 8

Mehta Vikas · CIK 0001852328 · Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 243,580

Underlying: Class A Common Stock · 46,823 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 at any time at the option of the reporting person into one share of Class A Common Stock. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the reporting person; and (3) the final conversion date, defined as the earlier of (a) the last trading day of the fiscal quarter immediately following the tenth anniversary of the effective date of the Issuer's tenth amended and restated certificate of incorporation; (b) the last trading day of the fiscal quarter during which the then-outstanding shares of Class B Common Stock first represent less than 5% of the aggregate number of then-outstanding shares of Class A Common Stock and Class B Common Stock.

F1 · 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. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the reporting person; and (3) the final conversion date, defined as the earlier of (a) the last trading day of the fiscal quarter immediately following the tenth anniversary of the effective date of the Issuer's tenth amended and restated certificate of incorporation; (b) the last trading day of the fiscal quarter during which the then-outstanding shares of Class B Common Stock first represent less than 5% of the aggregate number of then-outstanding shares of Class A Common Stock and Class B Common Stock.

F1 · 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. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the reporting person; and (3) the final conversion date, defined as the earlier of (a) the last trading day of the fiscal quarter immediately following the tenth anniversary of the effective date of the Issuer's tenth amended and restated certificate of incorporation; (b) the last trading day of the fiscal quarter during which the then-outstanding shares of Class B Common Stock first represent less than 5% of the aggregate number of then-outstanding shares of Class A Common Stock and Class B Common Stock.

SEC source: 0001628280-24-038544 · wk-form4_1724791020.xml · derivative · entry 7

Mehta Vikas · CIK 0001852328 · Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 290,403

Underlying: Class A Common Stock · 46,823 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 at any time at the option of the reporting person into one share of Class A Common Stock. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the reporting person; and (3) the final conversion date, defined as the earlier of (a) the last trading day of the fiscal quarter immediately following the tenth anniversary of the effective date of the Issuer's tenth amended and restated certificate of incorporation; (b) the last trading day of the fiscal quarter during which the then-outstanding shares of Class B Common Stock first represent less than 5% of the aggregate number of then-outstanding shares of Class A Common Stock and Class B Common Stock.

F1 · 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. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the reporting person; and (3) the final conversion date, defined as the earlier of (a) the last trading day of the fiscal quarter immediately following the tenth anniversary of the effective date of the Issuer's tenth amended and restated certificate of incorporation; (b) the last trading day of the fiscal quarter during which the then-outstanding shares of Class B Common Stock first represent less than 5% of the aggregate number of then-outstanding shares of Class A Common Stock and Class B Common Stock.

F1 · 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. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the reporting person; and (3) the final conversion date, defined as the earlier of (a) the last trading day of the fiscal quarter immediately following the tenth anniversary of the effective date of the Issuer's tenth amended and restated certificate of incorporation; (b) the last trading day of the fiscal quarter during which the then-outstanding shares of Class B Common Stock first represent less than 5% of the aggregate number of then-outstanding shares of Class A Common Stock and Class B Common Stock.

F6 · balance_after: Includes shares previously reported as restricted stock units.

SEC source: 0001628280-24-038544 · wk-form4_1724791020.xml · derivative · entry 6

Mehta Vikas · CIK 0001852328 · Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 46,823

Underlying: Class B Common Stock · 46,823 shares

Expires 2029-03-06

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.

F5 · derivative.exercise_date: One-fourth (1/4th) of the shares subject to the option award vested on January 22, 2020, and thereafter one-forty-eighth of the shares subject to the option award vested monthly, subject to the Reporting Person's continuous service.

SEC source: 0001628280-24-038544 · wk-form4_1724791020.xml · nonDerivative · entry 3

Mehta Vikas · CIK 0001852328 · Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 468,505

F2 · kind: Shares sold pursuant to a Rule 10b5-1 trading plan enter into on May 24, 2024

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.22 to $18.96 inclusive. The Reporting Person undertakes to provide to 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 at each separate price within the range set forth in this footnote.

SEC source: 0001628280-24-038544 · wk-form4_1724791020.xml · nonDerivative · entry 2

Mehta Vikas · CIK 0001852328 · Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 614,433

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 at any time at the option of the reporting person into one share of Class A Common Stock. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the reporting person; and (3) the final conversion date, defined as the earlier of (a) the last trading day of the fiscal quarter immediately following the tenth anniversary of the effective date of the Issuer's tenth amended and restated certificate of incorporation; (b) the last trading day of the fiscal quarter during which the then-outstanding shares of Class B Common Stock first represent less than 5% of the aggregate number of then-outstanding shares of Class A Common Stock and Class B Common Stock.

SEC source: 0001628280-24-038544 · wk-form4_1724791020.xml · nonDerivative · entry 1

Mehta Vikas · CIK 0001852328 · Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 553,479

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 at any time at the option of the reporting person into one share of Class A Common Stock. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the reporting person; and (3) the final conversion date, defined as the earlier of (a) the last trading day of the fiscal quarter immediately following the tenth anniversary of the effective date of the Issuer's tenth amended and restated certificate of incorporation; (b) the last trading day of the fiscal quarter during which the then-outstanding shares of Class B Common Stock first represent less than 5% of the aggregate number of then-outstanding shares of Class A Common Stock and Class B Common Stock.

SEC source: 0001415889-24-022143 · form4-08232024_090834.xml · nonDerivative · entry 7

Hirsch Brian · CIK 0001851605 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 70,905

F9 · kind: Represents receipt of shares in the distribution in kind described in footnote (8).

SEC source: 0001415889-24-022143 · form4-08232024_090834.xml · nonDerivative · entry 6

Hirsch Brian · CIK 0001851605 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Tribeca Venture Partners II GP, LLC

Disclosed balance after: 0

F8 · kind: Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by TVP II GP to its members without additional consideration.

F7 · ownership.nature: The shares are held by TVP II GP. The Reporting Person is a managing partner of TVP II GP. The Reporting Person disclaims beneficial ownership of the shares held by TVP II GP, except to the extent of his pecuniary interest, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such shares.

SEC source: 0001415889-24-022143 · form4-08232024_090834.xml · nonDerivative · entry 5

Hirsch Brian · CIK 0001851605 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Tribeca Venture Partners II GP, LLC

Disclosed balance after: 148,773

F6 · kind: Represents receipt of shares in the distributions in kind described in footnotes (4) and (5).

F7 · ownership.nature: The shares are held by TVP II GP. The Reporting Person is a managing partner of TVP II GP. The Reporting Person disclaims beneficial ownership of the shares held by TVP II GP, except to the extent of his pecuniary interest, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such shares.

SEC source: 0001415889-24-022143 · form4-08232024_090834.xml · nonDerivative · entry 4

Hirsch Brian · CIK 0001851605 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Tribeca Venture Fund II New York, L.P.

Disclosed balance after: 0

F5 · kind: Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by TVFII NY to its general partner and limited partners without additional consideration.

F3 · ownership.nature: The shares are held by Tribeca Venture Fund II New York, L.P. ("TVFII NY"). TVP II GP is the general partner of TVFII NY. The Reporting Person is a managing partner of TVP II GP. The Reporting Person disclaims beneficial ownership of the shares held by TVFII NY, except to the extent of his pecuniary interest, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such shares.

SEC source: 0001415889-24-022143 · form4-08232024_090834.xml · nonDerivative · entry 3

Hirsch Brian · CIK 0001851605 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Tribeca Venture Fund II, L.P.

Disclosed balance after: 0

F4 · kind: Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by TVFII to its general partner and limited partners without additional consideration.

F2 · ownership.nature: The shares are held by Tribeca Venture Fund II, L.P. ("TVFII"). Tribeca Venture Partners II GP, LLC ("TVP II GP") is the general partner of TVFII. The Reporting Person is a managing partner of TVP II GP. The Reporting Person disclaims beneficial ownership of the shares held by TVFII, except to the extent of his pecuniary interest, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such shares.

SEC source: 0000950170-24-100698 · ownership.xml · derivative · entry 9

GOODMAN ROBERT P · CIK 0001252022 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Class B Common Stock · 0 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 without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F2 · shares: Represents 437,618 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX L.P. ("BVP IX"), 350,598 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX Institutional L.P. ("BVP IX Inst"), and 3,319 shares converted from Class B Common Stock to Class A Common Stock by 15 Angels III LLC. ("15 Angels" and together with BVP IX and BVP IX Inst, the "BVP IX Funds")

F1 · price: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F1 · derivative.exercise_date: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F1 · derivative.expiration_date: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F2 · derivative.underlying_shares: Represents 437,618 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX L.P. ("BVP IX"), 350,598 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX Institutional L.P. ("BVP IX Inst"), and 3,319 shares converted from Class B Common Stock to Class A Common Stock by 15 Angels III LLC. ("15 Angels" and together with BVP IX and BVP IX Inst, the "BVP IX Funds")

F7 · balance_after: The Reporting Person is a director of Deer IX & Co. Ltd. ("Deer IX Ltd.") which is the general partner of Deer IX & Co. L.P. ("Deer IX LP"), which is the general partner of the BVP IX Funds The Reporting Person disclaims beneficial ownership of the securities held by BVP IX Funds, except to the extent of his pecuniary interest, if any, in such securities by virtue of his interest in Deer IX Ltd. and Deer IX LP and his indirect interest in the BVP IX Funds. This report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities.

F10 · balance_after: As of the date hereof, BVP IX, BVP IX Inst, and 15 Angels hold 2,319,606, 1,858,356, and 38,431 shares of Class B Stock, respectively.

F7 · ownership.nature: The Reporting Person is a director of Deer IX & Co. Ltd. ("Deer IX Ltd.") which is the general partner of Deer IX & Co. L.P. ("Deer IX LP"), which is the general partner of the BVP IX Funds The Reporting Person disclaims beneficial ownership of the securities held by BVP IX Funds, except to the extent of his pecuniary interest, if any, in such securities by virtue of his interest in Deer IX Ltd. and Deer IX LP and his indirect interest in the BVP IX Funds. This report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities.

SEC source: 0000950170-24-100698 · ownership.xml · nonDerivative · entry 2

GOODMAN ROBERT P · CIK 0001252022 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

F1 · kind: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F3 · shares: On August 22, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 49,712, 39,827, 823 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.52. These shares were sold in multiple transactions at prices ranging from $18.25 to $18.88. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F3 · price: On August 22, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 49,712, 39,827, 823 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.52. These shares were sold in multiple transactions at prices ranging from $18.25 to $18.88. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F3 · ownership.nature: On August 22, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 49,712, 39,827, 823 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.52. These shares were sold in multiple transactions at prices ranging from $18.25 to $18.88. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F7 · ownership.nature: The Reporting Person is a director of Deer IX & Co. Ltd. ("Deer IX Ltd.") which is the general partner of Deer IX & Co. L.P. ("Deer IX LP"), which is the general partner of the BVP IX Funds The Reporting Person disclaims beneficial ownership of the securities held by BVP IX Funds, except to the extent of his pecuniary interest, if any, in such securities by virtue of his interest in Deer IX Ltd. and Deer IX LP and his indirect interest in the BVP IX Funds. This report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities.

SEC source: 0000950170-24-100698 · ownership.xml · nonDerivative · entry 1

GOODMAN ROBERT P · CIK 0001252022 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

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 · kind: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F1 · shares: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F2 · price: Represents 437,618 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX L.P. ("BVP IX"), 350,598 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX Institutional L.P. ("BVP IX Inst"), and 3,319 shares converted from Class B Common Stock to Class A Common Stock by 15 Angels III LLC. ("15 Angels" and together with BVP IX and BVP IX Inst, the "BVP IX Funds")

F1 · ownership.nature: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F2 · ownership.nature: Represents 437,618 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX L.P. ("BVP IX"), 350,598 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX Institutional L.P. ("BVP IX Inst"), and 3,319 shares converted from Class B Common Stock to Class A Common Stock by 15 Angels III LLC. ("15 Angels" and together with BVP IX and BVP IX Inst, the "BVP IX Funds")

SEC source: 0000950170-24-099585 · ownership.xml · nonDerivative · entry 4

GOODMAN ROBERT P · CIK 0001252022 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

F5 · kind: On August 21, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 102,437, 82,068, and 1,697 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.59. These shares were sold in multiple transactions at prices ranging from $18.50 to $18.94. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F5 · shares: On August 21, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 102,437, 82,068, and 1,697 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.59. These shares were sold in multiple transactions at prices ranging from $18.50 to $18.94. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F5 · price: On August 21, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 102,437, 82,068, and 1,697 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.59. These shares were sold in multiple transactions at prices ranging from $18.50 to $18.94. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F5 · ownership.nature: On August 21, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 102,437, 82,068, and 1,697 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.59. These shares were sold in multiple transactions at prices ranging from $18.50 to $18.94. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F7 · ownership.nature: The Reporting Person is a director of Deer IX & Co. Ltd. ("Deer IX Ltd.") which is the general partner of Deer IX & Co. L.P. ("Deer IX LP"), which is the general partner of the BVP IX Funds The Reporting Person disclaims beneficial ownership of the securities held by BVP IX Funds, except to the extent of his pecuniary interest, if any, in such securities by virtue of his interest in Deer IX Ltd. and Deer IX LP and his indirect interest in the BVP IX Funds. This report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities.

SEC source: 0001415889-24-022143 · form4-08232024_090834.xml · derivative · entry 10

Hirsch Brian · CIK 0001851605 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Tribeca Venture Fund II New York, L.P.

Disclosed balance after: 931,394

Underlying: Class A Common Stock · 310,465 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: These shares of Class B common stock were converted into Class A common stock on a one-for-one basis for no additional consideration.

F11 · price: Each share of Class B common stock will convert automatically into one share of Class A common stock for no consideration upon any transfer, except for certain permitted transfers, and has no expiration date.

F11 · derivative.exercise_date: Each share of Class B common stock will convert automatically into one share of Class A common stock for no consideration upon any transfer, except for certain permitted transfers, and has no expiration date.

F11 · derivative.expiration_date: Each share of Class B common stock will convert automatically into one share of Class A common stock for no consideration upon any transfer, except for certain permitted transfers, and has no expiration date.

F3 · ownership.nature: The shares are held by Tribeca Venture Fund II New York, L.P. ("TVFII NY"). TVP II GP is the general partner of TVFII NY. The Reporting Person is a managing partner of TVP II GP. The Reporting Person disclaims beneficial ownership of the shares held by TVFII NY, except to the extent of his pecuniary interest, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such shares.

SEC source: 0001415889-24-022143 · form4-08232024_090834.xml · derivative · entry 9

Hirsch Brian · CIK 0001851605 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Tribeca Venture Fund II, L.P.

Disclosed balance after: 2,794,180

Underlying: Class A Common Stock · 931,394 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: These shares of Class B common stock were converted into Class A common stock on a one-for-one basis for no additional consideration.

F11 · price: Each share of Class B common stock will convert automatically into one share of Class A common stock for no consideration upon any transfer, except for certain permitted transfers, and has no expiration date.

F11 · derivative.exercise_date: Each share of Class B common stock will convert automatically into one share of Class A common stock for no consideration upon any transfer, except for certain permitted transfers, and has no expiration date.

F11 · derivative.expiration_date: Each share of Class B common stock will convert automatically into one share of Class A common stock for no consideration upon any transfer, except for certain permitted transfers, and has no expiration date.

F2 · ownership.nature: The shares are held by Tribeca Venture Fund II, L.P. ("TVFII"). Tribeca Venture Partners II GP, LLC ("TVP II GP") is the general partner of TVFII. The Reporting Person is a managing partner of TVP II GP. The Reporting Person disclaims beneficial ownership of the shares held by TVFII, except to the extent of his pecuniary interest, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such shares.

SEC source: 0001415889-24-022143 · form4-08232024_090834.xml · nonDerivative · entry 2

Hirsch Brian · CIK 0001851605 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Tribeca Venture Fund II New York, L.P.

Disclosed balance after: 310,465

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: These shares of Class B common stock were converted into Class A common stock on a one-for-one basis for no additional consideration.

F3 · ownership.nature: The shares are held by Tribeca Venture Fund II New York, L.P. ("TVFII NY"). TVP II GP is the general partner of TVFII NY. The Reporting Person is a managing partner of TVP II GP. The Reporting Person disclaims beneficial ownership of the shares held by TVFII NY, except to the extent of his pecuniary interest, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such shares.

SEC source: 0001415889-24-022143 · form4-08232024_090834.xml · nonDerivative · entry 1

Hirsch Brian · CIK 0001851605 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Tribeca Venture Fund II, L.P.

Disclosed balance after: 931,394

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: These shares of Class B common stock were converted into Class A common stock on a one-for-one basis for no additional consideration.

F2 · ownership.nature: The shares are held by Tribeca Venture Fund II, L.P. ("TVFII"). Tribeca Venture Partners II GP, LLC ("TVP II GP") is the general partner of TVFII. The Reporting Person is a managing partner of TVP II GP. The Reporting Person disclaims beneficial ownership of the shares held by TVFII, except to the extent of his pecuniary interest, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such shares.

SEC source: 0001628280-24-038027 · wk-form4_1724271252.xml · nonDerivative · entry 1

Fitzgerald Leanne · CIK 0001783261 · Chief Legal Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 377,071

F1 · kind: Shares sold pursuant to a Rule 10b5-1 trading plan enter into on May 20, 2024

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.64 to $19.05 inclusive. The Reporting Person undertakes to provide to 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 at each separate price within the range set forth in this footnote.

SEC source: 0000950170-24-099585 · ownership.xml · nonDerivative · entry 3

GOODMAN ROBERT P · CIK 0001252022 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

F4 · kind: On August 20, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 107,784, 86,352, and 1,786 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.81. These shares were sold in multiple transactions at prices ranging from $18.65 to $18.98. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F4 · shares: On August 20, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 107,784, 86,352, and 1,786 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.81. These shares were sold in multiple transactions at prices ranging from $18.65 to $18.98. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F4 · price: On August 20, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 107,784, 86,352, and 1,786 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.81. These shares were sold in multiple transactions at prices ranging from $18.65 to $18.98. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F4 · ownership.nature: On August 20, 2024, BVP IX, BVP IX Inst, and 15 Angels sold 107,784, 86,352, and 1,786 shares of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $18.81. These shares were sold in multiple transactions at prices ranging from $18.65 to $18.98. The reporting person undertakes to provide to 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 ranges set forth in this footnote.

F7 · ownership.nature: The Reporting Person is a director of Deer IX & Co. Ltd. ("Deer IX Ltd.") which is the general partner of Deer IX & Co. L.P. ("Deer IX LP"), which is the general partner of the BVP IX Funds The Reporting Person disclaims beneficial ownership of the securities held by BVP IX Funds, except to the extent of his pecuniary interest, if any, in such securities by virtue of his interest in Deer IX Ltd. and Deer IX LP and his indirect interest in the BVP IX Funds. This report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities.

SEC source: 0000950170-24-099585 · ownership.xml · derivative · entry 9

GOODMAN ROBERT P · CIK 0001252022 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Class B Common Stock · 0 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 without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F2 · shares: Represents 277,224 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX L.P. ("BVP IX"), 222,100 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX Institutional L.P. ("BVP IX Inst"), and 4,593 shares converted from Class B Common Stock to Class A Common Stock by 15 Angels III LLC. ("15 Angels" and together with BVP IX and BVP IX Inst, the "BVP IX Funds")

F1 · price: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F1 · derivative.exercise_date: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F1 · derivative.expiration_date: Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.

F2 · derivative.underlying_shares: Represents 277,224 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX L.P. ("BVP IX"), 222,100 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX Institutional L.P. ("BVP IX Inst"), and 4,593 shares converted from Class B Common Stock to Class A Common Stock by 15 Angels III LLC. ("15 Angels" and together with BVP IX and BVP IX Inst, the "BVP IX Funds")

F7 · balance_after: The Reporting Person is a director of Deer IX & Co. Ltd. ("Deer IX Ltd.") which is the general partner of Deer IX & Co. L.P. ("Deer IX LP"), which is the general partner of the BVP IX Funds The Reporting Person disclaims beneficial ownership of the securities held by BVP IX Funds, except to the extent of his pecuniary interest, if any, in such securities by virtue of his interest in Deer IX Ltd. and Deer IX LP and his indirect interest in the BVP IX Funds. This report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities.

F10 · balance_after: As of the date hereof, BVP IX, BVP IX Inst, and 15 Angels hold 2,757,224, 2,208,954, and 45,681 shares of Class B Stock, respectively.

F7 · ownership.nature: The Reporting Person is a director of Deer IX & Co. Ltd. ("Deer IX Ltd.") which is the general partner of Deer IX & Co. L.P. ("Deer IX LP"), which is the general partner of the BVP IX Funds The Reporting Person disclaims beneficial ownership of the securities held by BVP IX Funds, except to the extent of his pecuniary interest, if any, in such securities by virtue of his interest in Deer IX Ltd. and Deer IX LP and his indirect interest in the BVP IX Funds. This report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities.