Alexis Gil II - 23 Dec 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: 23 Dec 2025
Net transactions value: -$1,409,452
Form type: 4
Filing time: 23 Dec 2025, 20:13:51 UTC
Previous filing: 03 Dec 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	23 Dec 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	Disposed to Issuer	$1,409,452	-136,840	-100%	$10.30	0	23 Dec 2025	Direct	F1, F2

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

Alexis Gil II is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may continue.

Explanation of Responses:

Id	Content
F1	Pursuant to the Agreement and Plan of Merger, dated as of September 24, 2025 (the "Merger Agreement"), by and among the Issuer, Igloo Group Parent, Inc. ("Parent") and Igloo Group Acquisition Company, Inc. ("Merger Sub"), Merger Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly owned subsidiary of Parent. At the effective time of the Merger (the "Effective Time"), each issued and outstanding share of the Issuer's common stock, par value $0.001 per share ("Common Stock"), owned by the reporting person immediately prior to the Effective Time was automatically cancelled, extinguished and converted into the right to receive $10.30 per share in cash, without interest thereon (the "Per Share Price").
F2	The shares of Common Stock reported as disposed by the reporting person include 131,910 unvested restricted stock units ("Company RSUs") which, pursuant to the Merger Agreement, were, at or immediately prior to the Effective Time, cancelled and converted into the right to receive an amount in cash (without interest and subject to applicable withholding taxes) equal to the product of (i) the Per Share Price and (ii) the total number of shares of Common Stock subject to such Company RSUs as of immediately prior to the Effective Time (the "Converted Cash Awards"). The Converted Cash Awards will, subject to the reporting person's continued service through the applicable vesting dates, vest and be payable at the time when the Company RSUs for which the Converted Cash Awards were exchanged would have vested pursuant to the terms thereof.

Content

Pursuant to the Agreement and Plan of Merger, dated as of September 24, 2025 (the "Merger Agreement"), by and among the Issuer, Igloo Group Parent, Inc. ("Parent") and Igloo Group Acquisition Company, Inc. ("Merger Sub"), Merger Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly owned subsidiary of Parent. At the effective time of the Merger (the "Effective Time"), each issued and outstanding share of the Issuer's common stock, par value $0.001 per share ("Common Stock"), owned by the reporting person immediately prior to the Effective Time was automatically cancelled, extinguished and converted into the right to receive $10.30 per share in cash, without interest thereon (the "Per Share Price").

The shares of Common Stock reported as disposed by the reporting person include 131,910 unvested restricted stock units ("Company RSUs") which, pursuant to the Merger Agreement, were, at or immediately prior to the Effective Time, cancelled and converted into the right to receive an amount in cash (without interest and subject to applicable withholding taxes) equal to the product of (i) the Per Share Price and (ii) the total number of shares of Common Stock subject to such Company RSUs as of immediately prior to the Effective Time (the "Converted Cash Awards"). The Converted Cash Awards will, subject to the reporting person's continued service through the applicable vesting dates, vest and be payable at the time when the Company RSUs for which the Converted Cash Awards were exchanged would have vested pursuant to the terms thereof.