X0407 4 2023-06-12 0 0001637873 ACV Auctions Inc. ACVA 0001851605 Hirsch Brian C/O ACV AUCTIONS INC. 640 ELLICOTT STREET, #321 BUFFALO NY 14203 1 0 0 0 1 Class A Common Stock 2023-06-12 4 C 0 84076 A 84076 I By Tribeca Access Fund, L.P. Class A Common Stock 2023-06-12 4 S 0 84076 18.02 D 0 I By Tribeca Access Fund, L.P. Class A Common Stock 2023-06-13 4 C 0 63322 A 63322 I By Tribeca Access Fund, L.P. Class A Common Stock 2023-06-13 4 S 0 63322 18.02 D 0 I By Tribeca Access Fund, L.P. Class A Common Stock 2023-06-13 4 S 0 56710 18.03 D 276116 D Class A Common Stock 2023-06-14 4 C 0 46195 A 46195 I By Tribeca Access Fund, L.P. Class A Common Stock 2023-06-14 4 S 0 46195 17.66 D 0 I By Tribeca Access Fund, L.P. Class A Common Stock 2023-06-14 4 S 0 25702 17.69 D 250414 D Class B Common Stock 2023-06-12 4 C 0 84076 0.00 D Class A Common Stock 84076 141955 I By Tribeca Access Fund, L.P. Class B Common Stock 2023-06-13 4 C 0 63322 0.00 D Class A Common Stock 63322 78633 I By Tribeca Access Fund, L.P. Class B Common Stock 2023-06-14 4 C 0 46195 0.00 D Class A Common Stock 46195 32438 I By Tribeca Access Fund, L.P. Class B Common Stock Class A Common Stock 42200 42200 I By Tribeca ACV Holdings, LLC Class B Common Stock Class A Common Stock 5821210 5821210 I By Tribeca Venture Fund II, L.P. Class B Common Stock Class A Common Stock 1940405 1940405 I By Tribeca Venture Fund II New York, L.P. These shares of Class B common stock were converted into Class A common stock on a one-for-one basis for no additional consideration. The shares are held by Tribeca Access Fund, L.P. ("TAF"). Tribeca Access Fund GP, LLC ("TAF GP") is the general partner of TAF. The Reporting Person is a managing partner of TAF GP. The Reporting Person disclaims beneficial ownership of the shares held by TAF, 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.94 to $18.16 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.85 to $18.20 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. This transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2023. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.90 to $18.20 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.39 to $17.91 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.42 to $17.91 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. 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. The shares are held by Tribeca ACV Holdings, LLC ("TACV"). Tribeca Venture Partners II GP, LLC ("TVP II GP") is the general partner of TACV. The Reporting Person is a managing partner of TVP II GP. The Reporting Person disclaims beneficial ownership of the shares held by TACV, 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. The shares are held by Tribeca Venture Fund II, L.P. ("TVFII"). 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. 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. /s/ Brian Hirsch 2023-06-14