Tania Secor - Apr 3, 2024 Form 4 Insider Report for INTEGRAL AD SCIENCE HOLDING CORP. (IAS)

Role: Chief Financial Officer
Signature: /s/ Yossi Almani, by Power of Attorney
Stock symbol: IAS
Transactions as of: Apr 3, 2024
Transactions value $: $0
Form type: 4
Date filed: 4/5/2024, 04:28 PM
Previous filing: Apr 3, 2024
Next filing: Apr 9, 2024

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	+35.2K	+15.87%	$0.00	257K	Apr 3, 2024	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	-35.2K	-9.03%	$0.00	355K	Apr 3, 2024	Common Stock, $0.001 par value	35.2K		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 April 3, 2023.
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 March 31, 2023 (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 March 31, 2023).
F3	The market stock units vest 25% on April 3, 2024 and in equal installments every three months thereafter over a three year period, subject to continued employment.