Mark S. Zagorski - 15 Sep 2026 Form 4 Insider Report for DoubleVerify Holdings, Inc. (DV)

Reporting relationship: Chief Executive Officer, Director
Issuer ticker: DV
Reported as of: 15 Sep 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 17 Sep 2026, 16:08:24 UTC
Prior SEC filing: 01 Jul 2026
Next SEC filing: 02 Oct 2026
Source filing: View source filing
Reporting owner signature: /s/ Andrew E. Grimmig, as Attorney-in-Fact for Mark S. Zagorski

Key filing fact

Mark S. Zagorski filed Form 4 for DoubleVerify Holdings, Inc. (DV) on 17 Sep 2026.

Key facts

This page summarizes Mark S. Zagorski's Form 4 filing for DoubleVerify Holdings, Inc. (DV).
16 reported transactions and 6 derivative rows are listed below.
Accepted by SEC: 17 Sep 2026, 16:08.

Change

Previous filing in this sequence was filed on 01 Jul 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001709574 Primary reporting owner

Zagorski Mark

Relationship: Chief Executive Officer, Director
Address: C/O DOUBLEVERIFY HOLDINGS, INC., 462 BROADWAY, NEW YORK
Signature: /s/ Andrew E. Grimmig, as Attorney-in-Fact for Mark S. Zagorski
Signature date: 17 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

DV transaction

Common Stock

Options Exercise

Transaction value
Shares: +22,919
Change %: +3.9%
Price: $0.000000^*
Shares after: 603,283
Date: 15 Sep 2026
Ownership: Direct
Footnotes: F1

DV transaction

Common Stock

Tax liability

Transaction value
Shares: -11,701
Change %: -1.9%
Price: $13.50^*
Shares after: 591,582
Date: 15 Sep 2026
Ownership: Direct
Footnotes: F2

DV transaction

Common Stock

Options Exercise

Transaction value
Shares: +12,122
Change %: +2%
Price: $0.000000^*
Shares after: 603,704
Date: 15 Sep 2026
Ownership: Direct
Footnotes: F3

DV transaction

Common Stock

Tax liability

Transaction value
Shares: -6,189
Change %: -1%
Price: $13.50^*
Shares after: 597,515
Date: 15 Sep 2026
Ownership: Direct
Footnotes: F4

DV transaction

Common Stock

Options Exercise

Transaction value
Shares: +15,219
Change %: +2.5%
Price: $0.000000^*
Shares after: 612,734
Date: 15 Sep 2026
Ownership: Direct
Footnotes: F5

DV transaction

Common Stock

Tax liability

Transaction value
Shares: -7,770
Change %: -1.3%
Price: $13.50^*
Shares after: 604,964
Date: 15 Sep 2026
Ownership: Direct
Footnotes: F2

DV transaction

Common Stock

Options Exercise

Transaction value
Shares: +2,757
Change %: +0.46%
Price: $0.000000^*
Shares after: 607,721
Date: 15 Sep 2026
Ownership: Direct
Footnotes: F6

DV transaction

Common Stock

Tax liability

Transaction value
Shares: -1,408
Change %: -0.23%
Price: $13.50^*
Shares after: 606,313
Date: 15 Sep 2026
Ownership: Direct
Footnotes: F4

DV transaction

Common Stock

Options Exercise

Transaction value
Shares: +7,802
Change %: +1.3%
Price: $0.000000^*
Shares after: 614,115
Date: 15 Sep 2026
Ownership: Direct
Footnotes: F7

DV transaction

Common Stock

Tax liability

Transaction value
Shares: -3,983
Change %: -0.65%
Price: $13.50^*
Shares after: 610,132
Date: 15 Sep 2026
Ownership: Direct
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

DV transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -22,919
Change %: -10%
Price: $0.000000^*
Shares after: 206,243
Date: 15 Sep 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 22,919
Exercise price
Footnotes: F1, F8

DV transaction Derivative

Performance Stock Units

Options Exercise

Transaction value
Shares: -12,122
Change %: -17%
Price: $0.000000^*
Shares after: 60,605
Date: 15 Sep 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 12,122
Exercise price
Footnotes: F3, F9

DV transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -15,219
Change %: -10%
Price: $0.000000^*
Shares after: 136,971
Date: 15 Sep 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 15,219
Exercise price
Footnotes: F5, F8

DV transaction Derivative

Performance Stock Units

Options Exercise

Transaction value
Shares: -2,757
Change %: -50%
Price: $0.000000^*
Shares after: 2,757
Date: 15 Sep 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 2,757
Exercise price
Footnotes: F6, F9

DV transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -7,802
Change %: -17%
Price: $0.000000^*
Shares after: 39,005
Date: 15 Sep 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 7,802
Exercise price
Footnotes: F7, F8

DV transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -9,375
Change %: -50%
Price: $0.000000^*
Shares after: 9,375
Date: 15 Sep 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 9,375
Exercise price
Footnotes: F8, F10, F11

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 11 footnotes

Footnote F1

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.

Footnote F2

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

Footnote F3

Each performance stock unit was granted on March 13, 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.

Footnote F4

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

Footnote F5

Each restricted stock unit was granted on March 13, 2025. 6.25% of the restricted stock units vested and were settled on March 15, 2025 (the "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.

Footnote F6

Each performance stock unit was granted on December 19, 2023. 41.67% of the earned shares vested and were settled on the 2025 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 Vesting Date.

Footnote F7

Each restricted stock unit was granted on December 19, 2023. 6.25% of the restricted stock units vested and were settled on March 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.

Footnote F8

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

Footnote F9

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

Footnote F10

As reported previously, vested shares will be delivered to the reporting person as soon as administratively feasible following his separation from service with the Issuer.

Footnote F11

Each restricted stock unit was granted on December 12, 2022. 6.25% of the restricted stock units vested on March 15, 2023 (the "2023 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2023 Vesting Date.