| 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*
(Street)
(Country) | 2. Issuer Name and Ticker or Trading Symbol
DoubleVerify Holdings, Inc. [ DV ] | 5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
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| 2a. Foreign Trading Symbol
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| 3. Date of Earliest Transaction
(Month/Day/Year) 09/15/2026 | 6. Individual or Joint/Group Filing (Check Applicable Line)
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| 4. If Amendment, Date of Original Filed
(Month/Day/Year) |
| Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned | ||||||||||
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| 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 | 09/15/2026 | M | 9,376 | A | $0(1) | 104,536 | D | |||
| Common Stock | 09/15/2026 | F(2) | 4,787 | D | $13.5 | 99,749 | D | |||
| Common Stock | 09/15/2026 | M | 841 | A | $0(3) | 100,590 | D | |||
| Common Stock | 09/15/2026 | F(4) | 430 | D | $13.5 | 100,160 | D | |||
| Common Stock | 09/15/2026 | M | 3,171 | A | $0(5) | 103,331 | D | |||
| Common Stock | 09/15/2026 | F(2) | 1,619 | D | $13.5 | 101,712 | D | |||
| Common Stock | 09/15/2026 | M | 27,056 | A | $0(6) | 128,768 | D | |||
| Common Stock | 09/15/2026 | F(2) | 13,813 | D | $13.5 | 114,955 | D | |||
| Common Stock | 09/15/2026 | M | 251 | A | $0(7) | 115,206 | D | |||
| Common Stock | 09/15/2026 | F(4) | 129 | D | $13.5 | 115,077 | D | |||
| Common Stock | 09/15/2026 | M | 2,125 | A | $0(8) | 117,202 | D | |||
| Common Stock | 09/15/2026 | F(2) | 1,085 | D | $13.5 | 116,117 | D | |||
| Common Stock | 09/15/2026 | M | 1,143 | A | $0(9) | 117,260 | D | |||
| Common Stock | 09/15/2026 | F(2) | 584 | D | $13.5 | 116,676 | D | |||
| Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities) | |||||||||||||||
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| 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 | (10) | 09/15/2026 | M | 9,376 | (1) | (1) | Common Stock | 9,376 | $0 | 84,372 | D | ||||
| Performance Stock Units | (11) | 09/15/2026 | M | 841 | (3) | (3) | Common Stock | 841 | $0 | 4,208 | D | ||||
| Restricted Stock Units | (10) | 09/15/2026 | M | 3,171 | (5) | (5) | Common Stock | 3,171 | $0 | 31,705 | D | ||||
| Restricted Stock Units | (10) | 09/15/2026 | M | 27,056 | (6) | (6) | Common Stock | 27,056 | $0 | 54,112 | D | ||||
| Performance Stock Units | (11) | 09/15/2026 | M | 251 | (7) | (7) | Common Stock | 251 | $0 | 251 | D | ||||
| Restricted Stock Units | (10) | 09/15/2026 | M | 2,125 | (8) | (8) | Common Stock | 2,125 | $0 | 12,748 | D | ||||
| Restricted Stock Units | (10) | 09/15/2026 | M | 1,143 | (9) | (9) | Common Stock | 1,143 | $0 | 2,286 | D | ||||
| Explanation of Responses: |
| 1. Each restricted stock unit was granted on March 12, 2026. 8.33% of the restricted stock units vested and were settled on March 15, 2026 (the "2026 Vesting Date"), and the remainder of the restricted stock units vest and settle at a rate of 8.33% on each quarterly anniversary of the 2026 Vesting Date. |
| 2. Represents shares withheld to satisfy tax withholding obligations in connection with the vesting of restricted stock units. |
| 3. Each performance stock unit was granted on March 31, 2025. 41.67% of the earned shares vested and were settled on the 2026 Vesting Date, and the remainder of the earned shares vest and settle at a rate of 8.33% on each quarterly anniversary of the 2026 Vesting Date. |
| 4. Represents shares withheld to satisfy tax withholding obligations in connection with the vesting of performance stock units. |
| 5. Each restricted stock unit was granted on March 31, 2025. 6.25% of the restricted stock units vested and settled on June 15, 2025 (the "2025 Vesting Date"), and the remainder of the restricted stock units vest and settle at a rate of 6.25% on each quarterly anniversary of the 2025 Vesting Date. |
| 6. Each restricted stock unit was granted on March 13, 2025. 12.5% of the restricted stock units vested and were settled on the 2025 Vesting Date, and the remainder of the restricted stock units vest and settle at a rate of 12.5% on each quarterly anniversary of the 2025 Vesting Date. |
| 7. Each performance stock unit was granted on March 15, 2024. 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 and settle at a rate of 8.33% on each quarterly anniversary of the 2025 PSU Vesting Date. |
| 8. Each restricted stock unit was granted on March 15, 2024. 6.25% of the restricted stock units vested and settled on June 15, 2024 (the "2024 Vesting Date"), and the remainder of the restricted stock units vest and settle at a rate of 6.25% on each quarterly anniversary of the 2024 Vesting Date. |
| 9. Each restricted stock unit was granted on March 15, 2023. 6.25% of the restricted stock units vested and settled on June 15, 2023 (the "2023 Vesting Date") and the remainder of the restricted stock units vest and settle at a rate of 6.25% on each quarterly anniversary of the 2023 Vesting Date. |
| 10. Restricted stock units convert into common stock on a one-for-one basis. |
| 11. Performance stock units convert into common stock on a one-for-one basis. |
| /s/ Andrew E. Grimmig, as Attorney-in-Fact for Steven J. Mougis | 09/17/2026 | |
| ** 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) | ||