Integral Ad Science Holding Corp.
IASDelisted Dec 23, 2025- Industry
- Services-Computer Programming, Data Processing, Etc.
- SEC CIK
- 0001842718
Integral Ad Science Holding Corp. was delisted on Dec 23, 2025; its insiders filed their last Form 4 on Dec 29, 2025; 171 institutions reported holding it in 13F filings for Q3 2025, worth $1.65B in total; Soros Fund Management was the only superinvestor holding it.
Holders of 5% or more of IAS
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Integral Ad Science Holding Corp., largest stake first. The change is against the holder's previous filing.
No holder currently reports owning 5% or more of Integral Ad Science Holding Corp. on Schedule 13D or 13G.
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
6 Schedule 13D and 13G filings on Integral Ad Science Holding Corp., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Feb 12, 20264:43 PM ET | Glazer Capital, LLCand 1 other | 13G/A | 4.16%6.98M shares | −2.16 ppfrom 6.32%Below 5% | Dec 31, 2025 | SEC |
| Dec 29, 20257:05 PM ET | Vista Equity Partners Fund VI, L.P.and 8 others | 13G/A | 0.00%0 shares | –Below 5% | Dec 23, 2025 | SEC |
| Dec 23, 20258:36 PM ET | Atlas Venture Fund VIII, L.P.and 2 others | 13G/A | 0.00%0 shares | –Below 5% | Dec 23, 2025 | SEC |
| Dec 9, 20254:13 PM ET | Glazer Capital, LLCand 1 other | 13G | 6.32%10.6M shares | New | Dec 2, 2025 | SEC |
| Nov 13, 20255:56 PM ET | Sunriver Management LLCand 1 other | 13G/A | 4.30%7.12M shares | −1.00 ppfrom 5.30%Below 5% | Sep 30, 2025 | SEC |
| Aug 13, 20258:43 PM ET | Sunriver Management LLCand 1 other | 13G | 5.30%8.82M shares | New | Jun 30, 2025 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Integral Ad Science Holding Corp. shares.
No Form 144 notices for Integral Ad Science Holding Corp. are on file.