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

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Quoteable Key Fact

"Sunriver Management LLC disclosed 4.3% ownership in Integral Ad Science Holding Corp. Common Stock, $0.001 par value per share (IAS) on 30 Sep 2025."

Quick Takeaways

  • Sunriver Management LLC filed SCHEDULE 13G/A for Integral Ad Science Holding Corp. Common Stock, $0.001 par value per share (IAS).
  • Disclosed ownership: 4.3%.
  • Date of event: 30 Sep 2025.

What Changed

  • Previous schedule filing date: 13 Aug 2025.
  • Current filing was accepted on 13 Nov 2025, 17:56.

Why This Matters

  • This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
  • You can verify ownership claims directly against the original SEC filing.

Official SEC Source

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

See Original Filing

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

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