Sunriver Management LLC - Sep 30, 2025 SCHEDULE 13G/A Report for Integral Ad Science Holding Corp. Common Stock, $0.001 par value per share (IAS)

Filing Manager: Sunriver Management LLC
Reporting Manager: SUNRIVER MANAGEMENT LLC
Security: Integral Ad Science Holding Corp. Common Stock, $0.001 par value per share
Symbol: IAS
Shares outstanding: 166M shares
Disclosed Ownership: 7.12M shares
Ownership: 4.3%
Form type: SCHEDULE 13G/A
Date filed: 11/13/2025, 05:56 PM
Date of event: Sep 30, 2025
Previous filing: Aug 13, 2025
SEC: View on sec.gov

Reporting Managers (2)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
SUNRIVER MANAGEMENT LLC	4.3%	7.12M	0	7.12M	By: /s/ Randolph Willett Cook	Randolph Willett Cook, Managing Member
RANDOLPH WILLETT COOK	4.3%	7.12M	0	7.12M	By: /s/ Randolph Willett Cook	Randolph Willett Cook