Lisa Utzschneider - 02 May 2025 Form 4 Insider Report for INTEGRAL AD SCIENCE HOLDING CORP. (IAS)

Role: Chief Executive Officer, Director
Signature: /s/ Yossi Almani, by Power of Attorney
Issuer symbol: IAS
Transactions as of: 02 May 2025
Transactions value $: $0
Form type: 4
Filing time: 06 May 2025, 17:46:37 UTC
Previous filing: 09 Apr 2025
Next filing: 09 May 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Utzschneider Lisa	Chief Executive Officer, Director	C/O INTEGRAL AD SCIENCE HOLDING CORP., 12 E 49TH STREET, 20TH FLOOR, NEW YORK	/s/ Yossi Almani, by Power of Attorney	06 May 2025	0001651659

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	IAS	Common Stock, $0.001 par value	Options Exercise	$0	+16.7K	+4.88%	$0.00	358K	02 May 2025	Direct	F1

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	IAS	Market Stock Units	Options Exercise	$0	-16.7K	-6.25%	$0.00	250K	02 May 2025	Common Stock, $0.001 par value	16.7K		Direct	F2, F3

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

Explanation of Responses:

Id	Content
F1	Represents shares of common stock earned upon the vesting of market stock units granted on June 17, 2022.
F2	The number of market stock units reported represents the maximum possible number of shares that are eligible for vesting, which is 225% of the number of shares that would be earned at target. The minimum payout factor that must be achieved to earn any payout is 60%. The actual number of shares that will vest on each vesting date will be determined by comparing the price of common stock on the applicable vesting date to the price of common stock on April 29, 2022 (i.e., number of vested shares is equal to (i) the number of shares at target payout multiplied by (ii) (a) the average price of common stock for the 10 trading days immediately preceding the applicable vesting date divided by (b) the closing stock price on April 29, 2022).
F3	The market stock units vest 25% on May 2, 2023 and in equal installments every three months thereafter over a three year period, subject to the terms and conditions of the applicable award agreement.