DoubleVerify CEO receives 13.5K shares as awards vest

The remaining restricted stock units vest at 8.33% on each quarterly anniversary of December 31, 2025, subject to continued employment.

Rhea-AI Filing Summary

DoubleVerify Holdings, Inc. (DV) CEO Mark Zagorski converted 13,476 restricted stock units into 13,476 shares of common stock on September 30, 2026. In connection with vesting, 6,880 shares were withheld to satisfy tax withholding obligations at $13.49 per share. The reported restricted-stock-unit balance after the transaction was 107,804 units.

Insider Trade Summary

13,476 shares exercised/converted

Exercise 3 txns

Insider Zagorski Mark

Role Chief Executive Officer

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units F3, F1	13,476	$0.00	$0.00
Exercise	Common Stock F1	13,476	$0.00	$0.00
Tax Withholding	Common Stock F2	6,880	$13.49	$93K

Holdings After Transaction: Restricted Stock Units — 107,804 contracts (Direct); Common Stock — 616,728 shares (Direct)

Footnotes (3)

1. F1. Each restricted stock unit was granted on August 19, 2025. 8.33% of the restricted stock units vested and were settled on December 31, 2025 (the "2025 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 8.33% on each quarterly anniversary of the 2025 Vesting Date, subject to Mr. Zagorski's continued employment.
2. F2. Represents shares withheld to satisfy tax withholding obligations in connection with the vesting of restricted stock units.
3. F3. Restricted stock units convert into common stock on a one-for-one basis.

Key Figures

Restricted stock units converted: 13,476 restricted stock units Common shares acquired: 13,476 shares Shares withheld for taxes: 6,880 shares +3 more

6 metrics

Restricted stock units converted 13,476 restricted stock units Converted into common stock on September 30, 2026

Common shares acquired 13,476 shares September 30, 2026

Shares withheld for taxes 6,880 shares Withheld to satisfy tax withholding obligations on September 30, 2026

Withholding price $13.49 per share Shares withheld in connection with vesting on September 30, 2026

Restricted stock units after transaction 107,804 units Reported balance following the September 30, 2026 transaction

Vesting rate 8.33% Remainder vests on each quarterly anniversary of December 31, 2025, subject to continued employment

Key Terms

Restricted stock unit, one-for-one basis, tax withholding obligations, quarterly anniversary

4 terms

Restricted stock unit financial

"Each restricted stock unit was granted on August 19, 2025."

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

one-for-one basis technical

"Restricted stock units convert into common stock on a one-for-one basis."

tax withholding obligations financial

"Shares withheld to satisfy tax withholding obligations"

quarterly anniversary financial

"vest at a rate of 8.33% on each quarterly anniversary"

A quarterly anniversary marks the date that occurs every three months after a specific event, such as an investment or a business milestone. It is similar to a birthday that repeats four times a year, helping investors track the timing of important updates or changes. Recognizing these anniversaries allows investors to stay informed about progress and make timely decisions.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many DV shares did Mark Zagorski receive from RSUs?

Mark Zagorski converted 13,476 restricted stock units into 13,476 shares of common stock on September 30, 2026, on a one-for-one basis.

How many DV shares were withheld for taxes, and at what price?

6,880 shares were withheld to satisfy tax withholding obligations in connection with vesting, at $13.49 per share on September 30, 2026.

What are the vesting terms for Mark Zagorski's DV RSUs?

The restricted stock units were granted on August 19, 2025. 8.33% vested and settled on December 31, 2025, and the remainder vest at 8.33% on each quarterly anniversary of that date, subject to Mark Zagorski's continued employment.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/02/2026 - 04:05 PM Accepted by SEC EDGAR 10/02/2026 - 04:05 PM Learn about SEC filing dates

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Zagorski Mark

(Last) (First) (Middle)

C/O DOUBLEVERIFY HOLDINGS, INC.

462 BROADWAY

(Street)

NEW YORK NEW YORK 10013

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
DoubleVerify Holdings, Inc. [ DV ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/30/2026

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

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

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

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
Common Stock	09/30/2026		M		13,476	A	$0(1)	623,608	D
Common Stock	09/30/2026		F(2)		6,880	D	$13.49	616,728	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
Restricted Stock Units	(3)	09/30/2026		M			13,476	(1)	(1)	Common Stock	13,476	$0	107,804	D

Explanation of Responses:

1. Each restricted stock unit was granted on August 19, 2025. 8.33% of the restricted stock units vested and were settled on December 31, 2025 (the "2025 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 8.33% on each quarterly anniversary of the 2025 Vesting Date, subject to Mr. Zagorski's continued employment.

2. Represents shares withheld to satisfy tax withholding obligations in connection with the vesting of restricted stock units.

3. Restricted stock units convert into common stock on a one-for-one basis.

	/s/ Andrew E. Grimmig, as Attorney-in-Fact for Mark S. Zagorski	10/02/2026
	** 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.
* Form 4: SEC 1474 (03-26)