ZAGORSKI MARK (Chief Executive Officer) exercised options at DOUBLEVERIFY HOLDINGS, INC.

Option exercise — a mechanical event triggered by vesting or expiry. Not a discretionary conviction trade.

M · 4 exercises

ZAGORSKI MARK

Filed: 12/17/2025ACC: 0001819928-25-000034

InsiderZAGORSKI MARKCIK 1709574

→

IssuerDOUBLEVERIFY HOLDINGS, INC.CIK 1819928

DirectorOfficer· Chief Executive Officer

Since Apr 2021

-27.11K

Net shares

Net seller

$193.2K

Total sold

Open market trades

0B · 0S

Total transactions

32.35K acquired · 59.46K disposed

Non-Derivative Transactions9

Common Stock

Direct

J · J

+100.00

Price / share

$8.96

Trade value

$896.00

% of position

0.0%

11/30/2025

468.05K→468.15K

Common Stock

Direct

M · Option Exercise

+6.47K

Price / share

—

Trade value

—

% of position

1.4%

12/15/2025

468.15K→474.62K

Common Stock

Direct

F · Tax Withholding

−3.58K

Price / share

$10.83

Trade value

$38.76K

% of position

0.8%

12/15/2025

474.62K→471.04K

Common Stock

Direct

M · Option Exercise

+7.80K

Price / share

—

Trade value

—

% of position

1.7%

12/15/2025

471.04K→478.85K

Common Stock

Direct

F · Tax Withholding

−4.32K

Price / share

$10.83

Trade value

$46.73K

% of position

0.9%

12/15/2025

478.85K→474.53K

Common Stock

Direct

M · Option Exercise

+2.76K

Price / share

—

Trade value

—

% of position

0.6%

12/15/2025

474.53K→477.29K

Common Stock

Direct

F · Tax Withholding

−1.52K

Price / share

$10.83

Trade value

$16.52K

% of position

0.3%

12/15/2025

477.29K→475.76K

Common Stock

Direct

M · Option Exercise

+15.22K

Price / share

—

Trade value

—

% of position

3.2%

12/15/2025

475.76K→490.98K

Common Stock

Direct

F · Tax Withholding

−8.42K

Price / share

$10.83

Trade value

$91.16K

% of position

1.7%

12/15/2025

490.98K→482.56K

Total

Net shares

+14.51K

Net value

-$192.27K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	11/30/2025	J · J	+100.00	$8.96	$896.00	0.0%	468.05K	468.15K
Common Stock Direct	12/15/2025	M · Option Exercise	+6.47K	—	—	1.4%	468.15K	474.62K
Common Stock Direct	12/15/2025	F · Tax Withholding	−3.58K	$10.83	$38.76K	0.8%	474.62K	471.04K
Common Stock Direct	12/15/2025	M · Option Exercise	+7.80K	—	—	1.7%	471.04K	478.85K
Common Stock Direct	12/15/2025	F · Tax Withholding	−4.32K	$10.83	$46.73K	0.9%	478.85K	474.53K
Common Stock Direct	12/15/2025	M · Option Exercise	+2.76K	—	—	0.6%	474.53K	477.29K
Common Stock Direct	12/15/2025	F · Tax Withholding	−1.52K	$10.83	$16.52K	0.3%	477.29K	475.76K
Common Stock Direct	12/15/2025	M · Option Exercise	+15.22K	—	—	3.2%	475.76K	490.98K
Common Stock Direct	12/15/2025	F · Tax Withholding	−8.42K	$10.83	$91.16K	1.7%	490.98K	482.56K
Total			+14.51K		-$192.27K

Derivative Transactions5

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

6.47K shares

−6.47K

Strike price

Held after

0.00

Exercisable

—

12/15/2025

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

7.80K shares

−7.80K

Strike price

Held after

62.41K

Exercisable

—

12/15/2025

Performance Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

2.76K shares

−2.76K

Strike price

Held after

11.03K

Exercisable

—

12/15/2025

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

15.22K shares

−15.22K

Strike price

Held after

182.63K

Exercisable

—

12/15/2025

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

9.38K shares

−9.38K

Strike price

Held after

37.50K

Exercisable

—

12/15/2025

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Restricted Stock Units Direct	Common Stock6.47K shares	12/15/2025	M · Option Exercise	−6.47K	—	0.00
Restricted Stock Units Direct	Common Stock7.80K shares	12/15/2025	M · Option Exercise	−7.80K	—	62.41K
Performance Stock Units Direct	Common Stock2.76K shares	12/15/2025	M · Option Exercise	−2.76K	—	11.03K
Restricted Stock Units Direct	Common Stock15.22K shares	12/15/2025	M · Option Exercise	−15.22K	—	182.63K
Restricted Stock Units Direct	Common Stock9.38K shares	12/15/2025	M · Option Exercise	−9.38K	—	37.50K