Sunriver Management LLC - 30 Sep 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: 165,585,047 shares
Disclosed Ownership: 7,120,157 shares
Ownership: 4.3%
Form type: SCHEDULE 13G/A
Filing time: 13 Nov 2025, 17:56:05 UTC
Date of event: 30 Sep 2025
Previous filing: 13 Aug 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%	7,120,157	0	7,120,157	By: /s/ Randolph Willett Cook	Randolph Willett Cook, Managing Member
RANDOLPH WILLETT COOK	4.3%	7,120,157	0	7,120,157	By: /s/ Randolph Willett Cook	Randolph Willett Cook