Alexis Gil II - 02 Oct 2025 Form 4 Insider Report for INTEGRAL AD SCIENCE HOLDING CORP. (IAS)

Role: Chief Accounting Officer
Signature: /s/ Yossi Almani, by Power of Attorney
Issuer symbol: IAS
Transactions as of: 02 Oct 2025
Net transactions value: -$20,279
Form type: 4
Filing time: 06 Oct 2025, 16:25:02 UTC
Previous filing: 26 Sep 2025
Next filing: 07 Oct 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Gil Alexis II	Chief Accounting Officer	C/O INTEGRAL AD SCIENCE HOLDING CORP., 12 E. 49TH STREET, 20TH FLOOR, NEW YORK	/s/ Yossi Almani, by Power of Attorney	06 Oct 2025	0002001306

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	IAS	Common Stock, $0.001 par value	Sale	$20,279	-1,992	-1.4%	$10.18	143,148	02 Oct 2025	Direct	F1, F2

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

Explanation of Responses:

Id	Content
F1	Mandatory sale to cover tax liability associated with the settlement of restricted stock units.
F2	The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $10.18 to $10.20 per share. The reporting person undertakes to provide to Integral Ad Science Holding Corp., any security holder of Integral Ad Science Holding Corp. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.

Content

Mandatory sale to cover tax liability associated with the settlement of restricted stock units.

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $10.18 to $10.20 per share. The reporting person undertakes to provide to Integral Ad Science Holding Corp., any security holder of Integral Ad Science Holding Corp. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.