Sec Form 4 Filing - Bessemer Venture Partners IX L.P. @ ACV Auctions Inc. - 2023-09-12

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Bessemer Venture Partners IX L.P. 2. Issuer Name and Ticker or Trading Symbol ACV Auctions Inc. [ ACVA] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O BESSEMER VENTURE PARTNERS, 1865 PALMER AVE., SUITE 104 3. Date of Earliest Transaction (MM/DD/YY) 09/12/2023 (Street) LARCHMONT, NY10538 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class A Common Stock 09/12/2023 C 1,987,693 ( 1 ) A $ 0 ( 1 ) 1,987,693 ( 2 ) I See footnotes ( 2 ) ( 4 ) Class A Common Stock 09/12/2023 S( 3 ) 128,479 ( 3 ) D $ 16.21 ( 3 ) 1,859,214 ( 4 ) I See footnotes ( 4 ) ( 5 ) Class A Common Stock 09/13/2023 S( 6 ) 5,549 ( 6 ) D $ 16.07 ( 6 ) 1,853,665 ( 7 ) I See footnotes ( 4 ) ( 7 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Class B Common Stock ( 1 ) 09/12/2023 C 1,987,693 ( 2 ) ( 1 ) ( 1 ) Class A Common Stock 1,987,693 ( 2 ) $ 0 ( 1 ) 10,863,613 ( 8 ) I See footnotes ( 4 ) ( 8 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Bessemer Venture Partners IX L.P. C/O BESSEMER VENTURE PARTNERS 1865 PALMER AVE., SUITE 104 LARCHMONT, NY10538 X Bessemer Venture Partners IX Institutional L.P. C/O BESSEMER VENTURE PARTNERS 1865 PALMER AVE., SUITE 104 LARCHMONT, NY10538 X 15 Angels III LLC C/O BESSEMER VENTURE PARTNERS 1865 PALMER AVENUE, SUITE 104 LARCHMONT, NY10538 X Deer IX & Co. L.P. C/O BESSEMER VENTURE PARTNERS 1865 PALMER AVE., SUITE 104 LARCHMONT, NY10538 X Deer IX & Co. Ltd. C/O BESSEMER VENTURE PARTNERS 1865 PALMER AVE., SUITE 104 LARCHMONT, NY10538 X Signatures /s/ Scott Ring, General Counsel, Deer IX & Co. Ltd., the General Partner of Deer IX & Co. L.P., the General Partner of Bessemer Venture Partners IX L.P. 09/14/2023 Signature of Reporting Person Date /s/ Scott Ring, General Counsel, Deer IX & Co. Ltd., the General Partner of Deer IX & Co. L.P., the General Partner of Bessemer Venture Partners IX Institutional L.P. 09/14/2023 Signature of Reporting Person Date /s/ Scott Ring, Authorized Person, 15 Angels III LLC 09/14/2023 Signature of Reporting Person Date /s/ Scott Ring, General Counsel, Deer IX & Co. Ltd., the General Partner of Deer IX & Co. L.P. 09/14/2023 Signature of Reporting Person Date /s/ Scott Ring, General Counsel, Deer IX & Co. Ltd. 09/14/2023 Signature of Reporting Person Date

Explanation of Responses:

( 1 )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. ( 2 )Represents 1,093,509 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX L.P. ("BVP IX"), 876,068 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX Institutional L.P. ("BVP IX Inst"), and 18,116 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"). ( 3 )On September 12, 2023, the BVP IX, BVP IX Inst, and 15 Angels sold 70,681 shares, 56,627 shares, and 1,171 shares, of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $16.21. These shares were sold in multiple transactions at prices ranging from $16.12 to $16.31. 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. ( 4 )Deer IX & Co. Ltd. ("Deer Ltd.") is the general partner of Deer IX & Co. L.P. ("Deer L.P."), which is the general partner of the BVP IX Funds. Deer Ltd. and Deer L.P. disclaim beneficial ownership of the securities held by the BVP IX Funds, and this report shall not be deemed an admission that Deer Ltd. and Deer L.P. are the beneficial owners of such securities, except to the extent of their pecuniary interest therein, if any, by virtue of their direct and indirect general partner interests in the BVP IX Funds. ( 5 )After the September 12 transaction, BVP IX, BVP IX Inst, and 15 Angels own 1,022,828 shares, 819,441 shares and 16,945 shares, respectively, of Class A Common Stock. ( 6 )On September 13, 2023, the BVP IX, BVP IX Inst, and 15 Angels sold 3,053 shares, 2,446 shares, and 50 shares, of Class A Common Stock of ACV Auctions, Inc., respectively, at a weighted average price of $16.07. These shares were sold in multiple transactions at prices ranging from $16.00 to $16.11. 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. ( 7 )After the September 13 transaction, BVP IX, BVP IX Inst, and 15 Angels own 1,019,775 shares, 816,995 shares and 16,895 shares, respectively, of Class A Common Stock. ( 8 )After the reported transaction, BVP IX, BVP IX Inst, and 15 Angels own 5,976,508 shares, 4,788,093 shares and 99,012 shares, respectively, of Class B Common Stock.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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