OneStream, Inc.
OSDelisted Apr 1, 2026- Industry
- Services-Prepackaged Software
- SEC CIK
- 0001889956
OneStream, Inc. was delisted on Apr 1, 2026; its insiders filed their last Form 4 on Apr 7, 2026; 180 institutions reported holding it in 13F filings for Q1 2026, worth $2.23B in total; Soros Fund Management was the only superinvestor holding it.
Holders of 5% or more of OS
Holders whose latest Schedule 13D or 13G filing reports 5% or more of OneStream, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| KKR Dream Holdings LLC | 13G/A | 67.50%94.5M shares | – | Feb 12, 20251 filing | Feb 12, 2025 | SEC |
| Colby Craig | 13G/A | 10.90%9.13M shares | – | May 14, 20251 filing | May 14, 2025 | SEC |
| Vanguard Group Inc | 13G/A | 10.37%7.82M shares | +5.46 ppfrom 4.91% | Apr 30, 20252 filings | Jul 7, 2025 | SEC |
| Kayne Anderson Rudnick Investment Management LLC | 13G/A | 8.47%6.20M shares | – | May 14, 20251 filing | May 14, 2025 | SEC |
| Norges Bank | 13G/A | 8.40%6.34M shares | – | Jul 28, 20251 filing | Jul 28, 2025 | SEC |
| T. Rowe Price Investment Management, Inc. | 13G/A | 8.30%3.78M shares | −3.10 ppfrom 11.40% | Feb 7, 20252 filings | Feb 14, 2025 | SEC |
| Champlain Investment Partners, LLC | 13G | 5.50%4.04M shares | −2.10 ppfrom 7.60% | Feb 13, 20252 filings | May 14, 2025 | SEC |
| Darlington Partners Capital Management, LP | 13G | 5.30%3.84M shares | New | Mar 25, 20251 filing | Mar 25, 2025 | SEC |
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
15 Schedule 13D and 13G filings on OneStream, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Jul 28, 202512:08 PM ET | Norges Bank | 13G/A | 8.40%6.34M shares | – | Jun 30, 2025 | SEC |
| Jul 7, 20251:20 PM ET | Vanguard Group Inc | 13G/A | 10.37%7.82M shares | +5.46 ppfrom 4.91% | Jun 30, 2025 | SEC |
| May 14, 20255:32 PM ET | Colby Craig | 13G/A | 10.90%9.13M shares | – | Mar 31, 2025 | SEC |
| May 14, 20255:10 PM ET | Alliancebernstein L.P. | 13G/A | 3.90%2.85M shares | −1.50 ppfrom 5.40%Below 5% | Mar 31, 2025 | SEC |
| May 14, 20254:15 PM ET | Alkeon Capital Management LLCand 1 other | 13G/A | 3.50%2.53M shares | –Below 5% | Mar 31, 2025 | SEC |
| May 14, 20254:05 PM ET | Kayne Anderson Rudnick Investment Management LLCand 2 others | 13G/A | 8.47%6.20M shares | – | Mar 31, 2025 | SEC |
| May 14, 20253:42 PM ET | Champlain Investment Partners, LLC | 13G | 5.50%4.04M shares | −2.10 ppfrom 7.60% | May 14, 2025 | SEC |
| Apr 30, 202511:15 AM ET | Vanguard Group Inc | 13G/A | 4.91%3.59M shares | –Below 5% | Mar 31, 2025 | SEC |
| Mar 25, 20257:17 PM ET | Darlington Partners Capital Management, LPand 4 others | 13G | 5.30%3.84M shares | New | Mar 11, 2025 | SEC |
| Feb 14, 20259:45 AM ET | T. Rowe Price Investment Management, Inc. | 13G/A | 8.30%3.78M shares | −3.10 ppfrom 11.40% | Dec 31, 2024 | SEC |
| Feb 13, 20255:49 PM ET | Koefoed William A | 13G/A | 3.80%2.05M shares | –Below 5% | Dec 31, 2024 | SEC |
| Feb 13, 20254:35 PM ET | Champlain Investment Partners, LLC | 13G | 7.60%3.44M shares | New | Dec 31, 2024 | SEC |
| Feb 12, 20254:30 PM ET | KKR Dream Holdings LLCand 39 others | 13G/A | 67.50%94.5M shares | – | Dec 31, 2024 | SEC |
| Feb 7, 202511:55 AM ET | T. Rowe Price Investment Management, Inc. | 13G/A | 11.40%5.19M shares | – | Jan 31, 2025 | SEC |
| Feb 5, 20254:31 PM ET | Alliancebernstein L.P. | 13G | 5.40%2.47M shares | New | Dec 31, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell OneStream, Inc. shares.
No Form 144 notices for OneStream, Inc. are on file.