OnestreamOS
13F holders, Q1 2026 (March 31)180holders −4
76new positions
84sold out
8famous investors
$23.91avg. 13F price*
At the end of Q1 2026, 180 institutions reported holding Onestream Inc. (OS) in their 13F filings, down 4 from Q4 2025. 76 opened new positions and 84 sold out. The largest holders were Glazer Capital, LLC ($180.9M), Vanguard Portfolio Management LLC ($117.6M) and Temasek Holdings (Private) Ltd ($102.4M). 8 famous investors held it, including George Soros (0.8% of Soros Fund Management's portfolio), Israel Englander (0.0% of Millennium Management's portfolio) and Jeremy Grantham (0.0% of GMO's portfolio).
- Company
- Onestream Inc.
- CUSIP
- 68278B107
- Latest filing quarter
- Q1 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 76 | $1.1B |
| Exits | 84 | $694.4M |
All 13F filers, Q4 2025 → Q1 2026: 60,854,043 shares bought and 47,548,231 shares sold, net +13,305,812 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 180 holders
| Glazer Capital, LLC | 4.02% | New | 7,537,536 | $180.9M |
| Vanguard Portfolio Management LLC | 0.01% | — | 4,900,450 | $117.6M |
| Temasek Holdings (Private) Ltd | 0.34% | No change | 4,266,714 | $102.4M |
| FIL Ltd | 0.07% | New | 3,992,145 | $95.8M |
| Vanguard Capital Management LLC | 0.00% | — | 3,882,231 | $93.2M |
| AQR Arbitrage LLC | 1.60% | New | 3,393,367 | $81.4M |
| Nexpoint Asset Management, L.P. | 5.65% | New | 3,358,217 | $80.6M |
| O'Connor Alternative Investments LLC | 4.34% | — | 3,186,804 | $76.5M |
| Polar Asset Management Partners Inc. | 2.29% | New | 2,944,378 | $70.7M |
| Millennium Management | 0.05% | Add +636.4% | 2,471,107 | $59.3M |
| BlackRock, Inc. | 0.00% | Add +11.1% | 2,339,550 | $56.1M |
| UBS Group AG | 0.01% | Add +372.4% | 2,257,069 | $54.2M |
| Man Group plc | 0.11% | New | 2,204,520 | $52.9M |
| Goldman Sachs Group Inc. | 0.01% | Add +182.0% | 1,985,820 | $47.7M |
| Citadel Advisors | 0.03% | Reduce -16.8% | 1,890,118 | $45.4M |
| Pentwater Capital Management LP | 0.32% | New | 1,890,000 | $45.4M |
| First Trust Capital Management L.P. | 2.32% | New | 1,842,189 | $44.2M |
| Soros Fund Management | 0.81% | Add +454.6% | 1,830,222 | $43.9M |
| TIG Advisors, LLC | 1.99% | New | 1,738,231 | $41.7M |
| Morgan Stanley | 0.00% | Add +75.4% | 1,651,031 | $39.6M |
| HSBC Holdings PLC | 0.02% | Add +3942.9% | 1,595,839 | $38.3M |
| JPMorgan Chase & Co. | 0.00% | Add +415.7% | 1,467,884 | $35.2M |
| Oddo BHF Asset Management Sas | 1.38% | New | 1,450,000 | $34.8M |
| Healthcare of Ontario Pension Plan Trust Fund | 0.05% | Add +105.8% | 1,234,961 | $29.6M |
| Alliancebernstein L.P. | 0.01% | New | 1,535,061 | $28.2M |
| Qube Research & Technologies Ltd | 0.04% | Add +49.2% | 1,133,221 | $27.2M |
| Citigroup Inc. | 0.02% | Add +295.3% | 1,103,394 | $26.5M |
| Geode Capital Management, LLC | 0.00% | Add +3.1% | 1,099,122 | $26.4M |
| Capula Management Ltd | 0.23% | New | 1,074,711 | $25.8M |
| Marshall Wace, LLP | 0.03% | Reduce -64.4% | 990,806 | $23.8M |
| Susquehanna International Group, LLP | 0.03% | Add +674.0% | 984,652 | $23.6M |
| Alpine Associates Management Inc. | 1.30% | New | 920,692 | $22.1M |
| Verition Fund Management LLC | 0.21% | Add +6195.0% | 862,413 | $20.7M |
| Meteora Capital, LLC | 1.54% | New | 861,800 | $20.7M |
| Balyasny Asset Management L.P. | 0.04% | Add +99.6% | 817,569 | $19.6M |
| Syquant Capital Sas | 2.96% | New | 789,449 | $18.9M |
| Nearwater Capital Markets, Ltd | 0.40% | New | 707,800 | $17.0M |
| Fort Baker Capital Management LP | 1.74% | New | 689,587 | $16.6M |
| Westchester Capital Management, LLC | 0.79% | New | 677,498 | $16.3M |
| GMO | 0.04% | New | 676,553 | $16.2M |
| Alberta Investment Management Corp | 0.11% | Add +805.4% | 674,500 | $16.2M |
| Bank of America Corp. | 0.00% | Add +60.4% | 623,975 | $15.0M |
| State Street Corp. | 0.00% | Reduce -20.3% | 600,024 | $14.4M |
| Gabelli Funds LLC | 0.09% | New | 523,583 | $12.6M |
| CIBRA Capital Ltd | 6.02% | New | 519,691 | $12.5M |
| Squarepoint Ops LLC | 0.03% | New | 518,231 | $12.4M |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 511,124 | $12.3M |
| Groupe la Francaise | 0.17% | New | 509,500 | $12.2M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +5.9% | 499,512 | $12.0M |
| GABELLI & Co INVESTMENT ADVISERS, INC. | 1.46% | New | 408,372 | $9.8M |
| Boothbay Fund Management, LLC | 0.23% | Add +96.0% | 396,426 | $9.5M |
| Carmignac Gestion | 0.14% | New | 384,893 | $9.2M |
| Credit Industriel Et Commercial | 1.54% | New | 365,500 | $8.8M |
| Taconic Capital Advisors LP | 5.61% | New | 341,528 | $8.2M |
| AQR Capital Management | 0.00% | Add +12.4% | 326,514 | $7.8M |
| TPG GP A, LLC | 0.23% | New | 325,000 | $7.8M |
| Fifth Lane Capital, LP | 9.48% | New | 322,630 | $7.7M |
| Tokio Marine Asset Management Co. Ltd. | 0.24% | New | 284,300 | $6.8M |
| Picton Mahoney Asset Management | 0.07% | New | 274,000 | $6.6M |
| Trium Capital LLP | 4.75% | New | 272,803 | $6.5M |
| Absolute Gestao de Investimentos Ltda. | 0.67% | New | 245,160 | $5.9M |
| Northern Trust Corp. | 0.00% | Add +4.0% | 240,517 | $5.8M |
| Annis Gardner Whiting Capital Advisors, LLC | 0.87% | Add +10.2% | 227,217 | $5.5M |
| SG Americas Securities, LLC | 0.01% | Reduce -20.6% | 218,311 | $5.2M |
| New York Life Investment Management LLC | 0.04% | New | 215,678 | $5.2M |
| Kryger Capital LLC | 0.34% | — | 201,986 | $4.8M |
| Vestcor Inc | 0.12% | New | 175,000 | $4.2M |
| Swiss National Bank | 0.00% | Add +6.1% | 166,100 | $4.0M |
| Maven Securities LTD | 0.20% | New | 140,000 | $3.4M |
| Wolverine Asset Management LLC | 0.16% | New | 122,808 | $2.9M |
| Algert Global LLC | 0.04% | No change | 118,200 | $2.8M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +9.4% | 116,158 | $2.8M |
| BNP Paribas Financial Markets | 0.00% | Add +33.7% | 112,994 | $2.7M |
| Voleon Capital Management LP | 0.06% | Add +667.4% | 109,728 | $2.6M |
| Jane Street Group, LLC | 0.00% | Reduce -55.6% | 106,508 | $2.6M |
| California State Teachers Retirement System | 0.00% | Add +30.2% | 91,857 | $2.2M |
| Water Island Capital LLC | 0.31% | New | 91,120 | $2.2M |
| West Paces Advisors Inc. | 0.40% | No change | 85,218 | $2.0M |
| Readystate Asset Management LP | 0.20% | Reduce -36.3% | 82,162 | $2.0M |
| Varenne Capital Partners | 0.46% | New | 76,906 | $1.9M |
| CSS LLC | 0.25% | New | 65,508 | $1.6M |
| Yakira Capital Management, Inc. | 0.43% | New | 60,978 | $1.5M |
| Twin Securities, Inc. | 0.72% | New | 60,372 | $1.4M |
| LMR Partners LLP | 0.02% | New | 56,035 | $1.3M |
| Fieldview Capital Management, LLC | 0.38% | Add +258.9% | 54,807 | $1.3M |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.00% | — | 53,765 | $1.3M |
| Legal & General Group Plc | 0.00% | Reduce -21.3% | 52,631 | $1.3M |
| Commonwealth of Pennsylvania Public School Empls Retrmt SYS | 0.01% | New | 50,000 | $1.2M |
| Ieq Capital, LLC | 0.01% | New | 47,170 | $1.1M |
| FMR LLC | 0.00% | Add +1.6% | 45,762 | $1.1M |
| Transmarket Holdings LP | 0.55% | New | 42,726 | $1.0M |
| Kintayl Capital LP | 0.63% | New | 42,508 | $1.0M |
| Point72 Asset Management | 0.00% | Reduce -92.0% | 37,775 | $907K |
| State of Wisconsin Investment Board | 0.00% | Reduce -75.3% | 37,487 | $900K |
| Versor Investments LP | 1.99% | New | 33,832 | $812K |
| Schonfeld Strategic Advisors LLC | 0.01% | Add +145.1% | 33,709 | $809K |
| Barclays PLC | 0.00% | Reduce -80.5% | 33,072 | $794K |
| Vanguard Global Advisers, LLC | 0.00% | — | 32,510 | $780K |
| Oxford Asset Management LLP | 0.29% | Reduce -5.0% | 30,350 | $728K |
| Brevan Howard Capital Management LP | 0.01% | Add +166.0% | 27,198 | $653K |
"% of holder's portfolio" is OS's weight in each manager's 13F, not the share of Onestream Inc. the manager owns.