Mark Zagorski - Jul 21, 2021 Form 4 Insider Report for DoubleVerify Holdings, Inc. (DV)

Role: Chief Executive Officer, Director
Signature: /s/ Andrew E. Grimmig, as Attorney-in-Fact for Mark S. Zagorski
Stock symbol: DV
Transactions as of: Jul 21, 2021
Transactions value $: -$1,800,936
Form type: 4
Date filed: 7/22/2021, 04:07 PM
Previous filing: May 10, 2021
Next filing: Dec 14, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	DV	Common Stock	Options Exercise	$0	+86.6K	+35.02%	$0.00	334K	Jul 21, 2021	Direct	F1, F2
transaction	DV	Common Stock	Tax liability	-$1.8M	-49.7K	-14.88%	$36.25	284K	Jul 21, 2021	Direct	F3

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	DV	Restricted Stock Units	Options Exercise	$0	-86.6K	-100%	$0.00^*	0	Jul 21, 2021	Common Stock	86.6K		Direct	F1, F2, F4

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The total was increased by one share due to an administrative calculation error due to rounding of the vested amount.
F2	Each restricted stock unit was granted on July 28, 2020 and represents a right to receive one share of common stock on a one-for-one basis. The restricted stock units fully vested on July 21, 2021.
F3	Represents shares withheld to satisfy tax obligations in connection with the vesting of 86,581 restricted stock units on July 21, 2021.
F4	Restricted stock units convert into common stock on a one-for-one basis.