INTEGRAL AD SCIENCE HOLDING CORP. — Director's Dealing 2024

Apr 3, 2024

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: INTEGRAL AD SCIENCE HOLDING CORP. (IAS)
CIK: 0001842718
Period of Report: 2024-04-01

Reporting Person: SECOR TANIA (Chief Financial Officer)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2024-04-01	Market Stock Units	$	A	455978	Acquired		Common Stock, $0.001 par value (455978)	Direct

Footnotes

F1: 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 28, 2024 (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 proceeding the applicable vesting date divided by (b) the closing stock price on March 28, 2024).

F2: The market stock units vest 25% on April 1, 2025 and in equal installments every three months thereafter over a three year period, subject to continued employment.