# EDGAR Filing Document

**Accession Number:** 0002104368
**File Stem:** 0001819928-26-000016
**Filing Date:** 2026-1
**Character Count:** 10671
**Document Hash:** 52edb5ea5a9cdd8fa2f3497fbc62d654
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001819928-26-000016.hdr.sgml**: 20260108

**ACCESSION NUMBER**: 0001819928-26-000016

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20260101

**FILED AS OF DATE**: 20260108

**DATE AS OF CHANGE**: 20260108

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Mougis Steven John
- **CENTRAL INDEX KEY:** 0002104368

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-40349
- **FILM NUMBER:** 26519614

**MAIL ADDRESS:**
- **STREET 1:** 462 BROADWAY
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10013
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** DoubleVerify Holdings, Inc.
- **CENTRAL INDEX KEY:** 0001819928
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-COMPUTER PROGRAMMING, DATA PROCESSING, ETC. [7370]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 822714562
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 462 BROADWAY
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10013
- **BUSINESS PHONE:** 212-631-2111

**MAIL ADDRESS:**
- **STREET 1:** 462 BROADWAY
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10013

## Ex-24

```

POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes and
appoints each of Mark S. Zagorski, Nicola T. Allais and Andrew E. Grimmig,
and each of them individually, the undersigned's true and lawful
attorney-in-fact to:

(1) execute for and on behalf of the undersigned, in the undersigned's
capacity as an Officer and/or Director of DoubleVerify Holdings, Inc.
(the "Company"),

	(i) Forms 3, 4 and 5 and any other forms required to be filed
in accordance with Section 16(a) of the Securities Exchange Act of 1934
(the "Exchange Act") and the rules thereunder (a "Section 16 Form"), and

	(ii) a Form ID and any other forms required to be filed or submitted in
accordance with Regulation S-T promulgated by the United States Securities
and Exchange Commission (or any successor provision) in order to file a
Section 16 Form electronically (a "Form ID", and, together with a
Section 16 Form, the "Forms and Schedules");

(2) do and perform any and all acts for and on behalf of the undersigned
which may be necessary or desirable to complete and execute any such Forms
and Schedules, complete and execute any amendment or amendments thereto, and
timely file such Forms and Schedules with the United States Securities
and Exchange Commission and any stock exchange or similar authority; and

(3) take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of each such attorney-in-fact, may be of
benefit to, in the best interest of, or legally required by, the undersigned,
it being understood that the documents executed by each such attorney-in-fact
on behalf of the undersigned pursuant to this Power of Attorney shall be in
such form and shall contain such terms and conditions as he or she may
approve in his or her discretion.

The undersigned hereby grants to each such attorney-in-fact full power
and authority to do and perform any and every act and thing whatsoever
requisite, necessary or proper to be done in the exercise of any of the rights
and powers herein granted, as fully to all intents and purposes as the
undersigned might or could do if personally present, with full power of
substitution or revocation, hereby ratifying and confirming all that each such
attorney-in-fact, or his or her substitute or substitutes, shall lawfully do or
cause to be done by virtue of this Power of Attorney and the rights and powers
herein granted. The undersigned acknowledges that each such attorney-in-fact
is serving in such capacity at the request of the undersigned, and is not
assuming, nor is the Company assuming, any of the undersigned's
responsibilities to comply with Section 16 of the Exchange Act.

The Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file any Forms and Schedules with
respect to the undersigned's holdings of and transactions in securities issued
by the Company, unless earlier revoked by the undersigned in a signed writing
delivered to each such attorney-in-fact. From and after the date hereof, any
Power of Attorney previously granted by the undersigned concerning the subject
matter hereof is hereby revoked.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney
to be executed as of this 18th day of December, 2025.

By: /s/ Steven J. Mougis

Steven Mougis

```

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Mougis Steven John<br><sub>(Last) (First) (Middle)</sub><br>C/O DOUBLEVERIFY HOLDINGS, INC.<br>462 BROADWAY<br><sub>(Street)</sub><br>NEW YORK, NY 10013<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>DoubleVerify Holdings, Inc. [ DV ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2026-01-01 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director   [ ] 10% Owner<br>[X] Officer (give title below)   [ ] Other (specify below)<br>_Global Chief Comm. Officer_ | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |
| Common Stock | 36062 | D |  |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| Options (Right to Buy) | <sup>(1)</sup> | 2031-07-21 | Common Stock | 16451 | $36.25 | D |  |
| Options (Right to Buy) | <sup>(2)</sup> | 2032-02-15 | Common Stock | 7018 | $29.10 | D |  |
| Restricted Stock Units | <sup>(2)</sup> | <sup>(2)</sup> | Common Stock | 418 | <sup>(3)</sup> | D |  |
| Options (Right to Buy) | <sup>(4)</sup> | 2033-03-15 | Common Stock | 21603 | $24.60 | D |  |
| Restricted Stock Units | <sup>(4)</sup> | <sup>(4)</sup> | Common Stock | 5715 | <sup>(3)</sup> | D |  |
| Restricted Stock Units | <sup>(5)</sup> | <sup>(5)</sup> | Common Stock | 19123 | <sup>(3)</sup> | D |  |
| Performance Stock Units | <sup>(6)</sup> | <sup>(6)</sup> | Common Stock | 1002 | <sup>(7)</sup> | D |  |
| Restricted Stock Units | <sup>(8)</sup> | <sup>(8)</sup> | Common Stock | 135280 | <sup>(3)</sup> | D |  |
| Restricted Stock Units | <sup>(9)</sup> | <sup>(9)</sup> | Common Stock | 41218 | <sup>(3)</sup> | D |  |

---

### Footnotes:

(1) Each stock option was granted on July 21, 2021. The stock options vested 6.25% on December 15, 2021 (the "2021 Vesting Date") and the remainder of the stock options vested at a rate of 6.25% on each quarterly anniversary of the 2021 Vesting Date. The options fully vested on September 15, 2025.

(2) Each restricted stock unit and stock option was granted on February 15, 2022. The restricted stock units and stock options vested 6.25% on June 15, 2022 (the "2022 Vesting Date") and the remainder of the restricted stock units and stock options vest at a rate of 6.25% on each quarterly anniversary of the 2022 Vesting Date.

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

(4) Each restricted stock unit and stock option was granted on March 15, 2023. The restricted stock units and stock options vested 6.25% on June 15, 2023 (the "2023 Vesting Date") and the remainder of the restricted stock units and stock options vest at a rate of 6.25% on each quarterly anniversary of the 2023 Vesting Date.

(5) Each restricted stock unit was granted on March 15, 2024. The restricted stock units vested 6.25% on June 15, 2024 (the "2024 Vesting Date") and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2024 Vesting Date.

(6) Each performance stock unit was granted on December 19, 2023. 41.67% of the earned shares vested and were settled on March 15, 2025 (the "2025 PSU Vesting Date"), and the remainder of the earned shares vest at a rate of 8.33% on each quarterly anniversary of the 2025 PSU Vesting Date.

(7) Performance stock units convert into common stock on a one-for-one basis.

(8) Each restricted stock unit was granted on March 13, 2025. The restricted stock units vested 12.5% on June 15, 2025 (the "2025 Vesting Date") and the remainder of the restricted stock units vest at a rate of 12.5% on each quarterly anniversary of the 2025 Vesting Date.

(9) Each restricted stock unit was granted on March 31, 2025. The restricted stock units vested 6.25% on 2025 Vesting Date and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2025 Vesting Date.

**Signature:** /s/ Andrew E. Grimmig, as Attorney-in-Fact for Steven J. Mougis  
**Date:** 2026-01-08

### Remarks:

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.**