VEP Group, LLC - 23 Dec 2025 Form 4 Insider Report for INTEGRAL AD SCIENCE HOLDING CORP. (IAS)

Reporting relationship: 10%+ Owner
Issuer ticker: IAS
Reported as of: 23 Dec 2025
Net transaction value: -$669,603,010
SEC form: 4
Accepted by SEC: 29 Dec 2025, 18:07:55 UTC
Prior SEC filing: 03 Oct 2024
Next SEC filing: 02 Feb 2026
Source filing: View source filing
Reporting owner signature: /s/ Robert F. Smith, Managing Member of VEP Group, LLC

Key filing fact

VEP Group, LLC filed Form 4 for INTEGRAL AD SCIENCE HOLDING CORP. (IAS) on 29 Dec 2025.

Key facts

This page summarizes VEP Group, LLC's Form 4 filing for INTEGRAL AD SCIENCE HOLDING CORP. (IAS).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 29 Dec 2025, 18:07.

Change

Previous filing in this sequence was filed on 03 Oct 2024.
Current net transaction value: -$669,603,010.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (9)

CIK 0001216495 Primary reporting owner

VEP Group, LLC

Relationship: 10%+ Owner
Address: C/O VISTA EQUITY PARTNERS, 4 EMBARCADERO CENTER, 20TH FL., SAN FRANCISCO
Signature: /s/ Robert F. Smith, Managing Member of VEP Group, LLC
Signature date: 29 Dec 2025

CIK 0001665262

Vista Equity Partners Fund VI, L.P.

Relationship: 10%+ Owner
Address: C/O VISTA EQUITY PARTNERS, 4 EMBARCADERO CENTER, 20TH FL., SAN FRANCISCO
Signature: /s/ Robert F. Smith, Director of the General Partner of the General Partner of Vista Equity Partners Fund VI, L.P.
Signature date: 29 Dec 2025

CIK 0001665190

Vista Equity Partners Fund VI-A, L.P.

Relationship: 10%+ Owner
Address: C/O VISTA EQUITY PARTNERS, 4 EMBARCADERO CENTER, 20TH FL., SAN FRANCISCO
Signature: /s/ Robert F. Smith, Director of the General Partner of the General Partner of Vista Equity Partners Fund VI-A, L.P.
Signature date: 29 Dec 2025

CIK 0001665225

VEPF VI FAF, L.P.

Relationship: 10%+ Owner
Address: C/O VISTA EQUITY PARTNERS, 4 EMBARCADERO CENTER, 20TH FL., SAN FRANCISCO
Signature: /s/ Robert F. Smith, Director of the General Partner of the General Partner of VEPF VI FAF, L.P.
Signature date: 29 Dec 2025

CIK 0001786024

Vista Equity Partners Fund VI GP, L.P.

Relationship: 10%+ Owner
Address: C/O VISTA EQUITY PARTNERS, 4 EMBARCADERO CENTER, 20TH FL., SAN FRANCISCO
Signature: /s/ Robert F. Smith, Director of the General Partner of Vista Equity Partners Fund VI GP, L.P.
Signature date: 29 Dec 2025

CIK 0001786074

VEPF VI GP. Ltd.

Relationship: 10%+ Owner
Address: C/O VISTA EQUITY PARTNERS, 4 EMBARCADERO CENTER, 20TH FL., SAN FRANCISCO
Signature: /s/ Robert F. Smith, Director of VEPF VI GP, Ltd.
Signature date: 29 Dec 2025

CIK 0001689919

VEPF MANAGEMENT, L.P.

Relationship: 10%+ Owner
Address: C/O VISTA EQUITY PARTNERS, 4 EMBARCADERO CENTER, 20TH FL., SAN FRANCISCO
Signature: /s/ Robert F. Smith, Managing Member of the General Partner of VEPF Management, L.P.
Signature date: 29 Dec 2025

CIK 0001569532

VISTA EQUITY PARTNERS MANAGEMENT, LLC

Relationship: 10%+ Owner
Address: C/O VISTA EQUITY PARTNERS, 4 EMBARCADERO CENTER, 20TH FL., SAN FRANCISCO
Signature: /s/ Robert F. Smith, Managing Member of the Managing Member of Vista Equity Partners Management, LLC
Signature date: 29 Dec 2025

CIK 0001216497

SMITH ROBERT F

Relationship: 10%+ Owner
Address: C/O VISTA EQUITY PARTNERS, 401 CONGRESS DRIVE, SUITE 3100, AUSTIN
Signature: /s/ Robert F. Smith
Signature date: 29 Dec 2025

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

IAS transaction

Common Stock, $0.001 par value

Other

Transaction value: $669,603,010
Shares: -65,010,001
Change %: -100%
Price: $10.30
Shares after: 0
Date: 23 Dec 2025
Ownership: See Footnotes
Footnotes: F1, F2, F3, F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

VEP Group, LLC is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Explanation of responses 4 footnotes

Footnote F1

Pursuant to the Agreement and Plan of Merger, dated as of September 24, 2025, 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, each issued and outstanding share of the Issuer's common stock, par value $0.001 per share ("Common Stock"), owned by the reporting persons 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.

Footnote F2

Consisted of (i) 40,222,196 shares of Common Stock held by Vista Equity Partners Fund VI, L.P. ("VEPF VI"), (ii) 24,298,354 shares of Common Stock held by Vista Equity Partners Fund VI-A, L.P. ("VEPF VI-A") and (iii) 489,451 shares of Common Stock held by VEPF VI FAF, L.P. ("VEPF FAF" and, collectively with VEPF VI and VEPF VI-A, the "Vista Funds").

Footnote F3

Vista Equity Partners Fund VI GP, L.P. ("Fund VI GP") is the sole general partner of each of the Vista Funds. Fund VI GP's sole general partner is VEPF VI GP, Ltd. ("Fund VI UGP"). Robert F. Smith is the sole director and one of 11 members of Fund VI UGP. VEPF Management, L.P. ("Management Company") is the sole management company of each of the Vista Funds. The Management Company's sole general partner is VEP Group, LLC ("VEP Group"), and the Management Company's sole limited partner is Vista Equity Partners Management, LLC ("VEPM"). VEP Group is the Senior Managing Member of VEPM. Robert F. Smith is the sole Managing Member of VEP Group. Consequently, Mr. Smith, Fund VI GP, Fund VI UGP, the Management Company, VEPM and VEP Group may be deemed the beneficial owners of the shares held by the Vista Funds.

Footnote F4

Each of the Vista Funds, Fund VI GP, Fund VI UGP, the Management Company, VEP Group, VEPM and Mr. Smith expressly disclaim beneficial ownership except to the extent of its or his pecuniary interest and the inclusion of the reported securities in this report shall not be deemed an admission by any of the foregoing of beneficial ownership of any or all of the reported securities for purposes of Section 16 or for any other purpose.