Sunriver Management LLC - Jun 30, 2025 SCHEDULE 13G 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: 8.82M shares
Ownership: 5.3%
Form type: SCHEDULE 13G
Date filed: 8/13/2025, 08:43 PM
Date of event: Jun 30, 2025
Next filing: Nov 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	5.3%	8.82M	0	8.82M	By: /s/ Randolph Willett Cook	Randolph Willett Cook, Managing Member
RANDOLPH WILLETT COOK	5.3%	8.82M	0	8.82M	By: /s/ Randolph Willett Cook	Randolph Willett Cook