X0508 4 2023-09-05 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 0 Class A Common Stock 2023-09-05 4 J 0 42200 0.00 D 0 I By Tribeca ACV Holdings, LLC Class A Common Stock 2023-09-05 4 J 0 365 0.00 A 365 I By Tribeca Venture Partners II GP, LLC Class A Common Stock 2023-09-05 4 J 0 365 0.00 D 0 I By Tribeca Venture Partners II GP, LLC Class A Common Stock 2023-09-05 4 J 0 183 0.00 A 168185 D Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by Tribeca ACV Holdings, LLC ("TACV") to its general partner and limited partners without additional consideration. The shares are held by 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. Represents receipt of shares in the distribution in kind described in footnote (1). 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. 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. Represents receipt of shares in the distribution in kind described in footnote (5). /s/ Brian Hirsch 2023-09-07