[Form 4] ACV Auctions Inc. Insider Trading Activity

Rhea-AI Filing Summary

ACV Auctions Inc. (ACVA) director reported open-market purchases of Class A common stock. On 11/14/2025, the reporting person bought 15,000 shares at a weighted average price of $6.26 per share, with individual trades ranging from $6.25 to $6.26. On 11/17/2025, the director purchased an additional 5,000 shares in a single transaction at $6.27 per share. Following these transactions, the director beneficially owns 39,107 Class A common shares held directly.

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Castillo Kirsten

(Last) (First) (Middle)

C/O ACV AUCTIONS INC.

640 ELLICOTT ST. # 321

(Street)

BUFFALO NY 14203

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
ACV Auctions Inc. [ ACVA ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
11/14/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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	11/14/2025		P		15,000	A	$6.26(1)	34,107	D
Class A Common Stock	11/17/2025		P		5,000	A	$6.27(2)	39,107	D

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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: 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

Explanation of Responses:

1. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $6.25 to $6.26 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 purchased at each separate price within the range set forth in this footnote.

2. These shares were purchased in a single transaction for $6.27 per share.

Remarks:

	/s/ Michelle Webb, Attorney-in-Fact	11/18/2025
	** Signature of Reporting Person	Date
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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did ACV Auctions (ACVA) report on this Form 4?

A director of ACV Auctions Inc. reported open-market purchases of Class A common stock totaling 20,000 shares across two transactions in November 2025.

How many ACVA shares did the director buy and on which dates?

The director bought 15,000 Class A common shares on 11/14/2025 and 5,000 shares on 11/17/2025.

At what prices were the ACV Auctions (ACVA) shares purchased?

On 11/14/2025, 15,000 shares were bought at a weighted average price of $6.26 per share, with trades between $6.25 and $6.26. On 11/17/2025, 5,000 shares were purchased at $6.27 per share.

How many ACVA shares does the director own after these transactions?

After the reported purchases, the director beneficially owns 39,107 shares of ACV Auctions Inc. Class A common stock, held directly.

What does the weighted average price disclosure mean in this ACVA Form 4?

The Form 4 states that the $6.26 price for the 11/14/2025 trade is a weighted average, as the 15,000 shares were purchased in multiple transactions between $6.25 and $6.26 per share. The reporting person offers to provide detailed trade prices and share amounts upon request.

Is the ownership reported on the ACVA Form 4 direct or indirect?

The Form 4 indicates that the 39,107 Class A common shares are held with direct ownership by the reporting person.