OnestreamOS
13F holders, Q3 2025 (September 30)185holders −1
52new positions
49sold out
4famous investors
$18.43avg. 13F price*
At the end of Q3 2025, 185 institutions reported holding Onestream Inc. (OS) in their 13F filings, down 1 from Q2 2025. 52 opened new positions and 49 sold out. The largest holders were T. Rowe Price Investment Management, Inc. ($172.9M), Vanguard Group Inc. ($158.6M) and Kayne Anderson Rudnick Investment Management LLC ($114.5M). 4 famous investors held it, including George Soros (0.1% of Soros Fund Management's portfolio), Israel Englander (0.0% of Millennium Management's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Onestream Inc.
- CUSIP
- 68278B107
- Latest filing quarter
- Q1 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 52 | $66.6M |
| Exits | 49 | $102.8M |
All 13F filers, Q2 2025 → Q3 2025: 11,256,618 shares bought and 13,221,121 shares sold, net −1,964,503 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 185 holders
| T. Rowe Price Investment Management, Inc. | 0.11% | Add +4.0% | 9,382,724 | $172.9M |
| Vanguard Group Inc. | 0.00% | Add +10.1% | 8,605,839 | $158.6M |
| Kayne Anderson Rudnick Investment Management LLC | 0.28% | Reduce -9.7% | 6,211,980 | $114.5M |
| Temasek Holdings (Private) Ltd | 0.27% | Add +44.3% | 4,266,714 | $78.6M |
| Darlington Partners Capital Management, LP | 2.39% | No change | 3,839,405 | $70.8M |
| Brown Advisory Inc. | 0.09% | Add +40.1% | 3,645,975 | $67.2M |
| Champlain Investment Partners, LLC | 0.40% | Reduce -23.5% | 2,886,232 | $53.2M |
| Alliancebernstein L.P. | 0.02% | Add +13.4% | 2,659,712 | $49.0M |
| TimesSquare Capital Management, LLC | 0.67% | Reduce -4.5% | 2,545,548 | $46.9M |
| Marshall Wace, LLP | 0.05% | Add +24.8% | 2,481,917 | $45.7M |
| BlackRock, Inc. | 0.00% | Add +2.6% | 2,102,778 | $38.8M |
| Massachusetts Financial Services Co. | 0.01% | Add +33.9% | 1,423,868 | $26.2M |
| Neuberger Berman Group LLC | 0.02% | Reduce -14.3% | 1,328,066 | $24.5M |
| Wasatch Advisors LP | 0.13% | Add +2.0% | 1,293,252 | $23.8M |
| Wellington Management Group LLP | 0.00% | New | 1,261,552 | $23.3M |
| Royal Bank of Canada | 0.00% | Add +18.1% | 1,196,579 | $22.1M |
| Morgan Stanley | 0.00% | Add +22.2% | 1,146,709 | $21.1M |
| American Century Companies Inc. | 0.01% | Reduce -30.7% | 1,146,236 | $21.1M |
| Geode Capital Management, LLC | 0.00% | Add +8.4% | 1,026,175 | $18.9M |
| Healthcare of Ontario Pension Plan Trust Fund | 0.03% | No change | 950,000 | $17.5M |
| Federated Hermes, Inc. | 0.03% | No change | 850,000 | $15.7M |
| Alkeon Capital Management LLC | 0.07% | Reduce -15.8% | 800,000 | $14.7M |
| State Street Corp. | 0.00% | Add +7.6% | 720,050 | $13.3M |
| Millennium Management | 0.01% | Reduce -10.6% | 703,776 | $13.0M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -81.7% | 662,886 | $12.2M |
| Bank of America Corp. | 0.00% | Reduce -12.4% | 633,054 | $11.7M |
| Wells Fargo & Company | 0.00% | Reduce -16.3% | 630,848 | $11.6M |
| Qube Research & Technologies Ltd | 0.02% | Add +10.3% | 627,376 | $11.6M |
| Clearbridge Investments, LLC | 0.01% | Add +11.4% | 611,506 | $11.3M |
| Susquehanna International Group, LLP | 0.02% | Add +4519.4% | 577,468 | $10.6M |
| Seven Grand Managers, LLC | 0.75% | Reduce -41.2% | 500,000 | $9.2M |
| TD Asset Management Inc | 0.01% | Reduce -4.8% | 476,266 | $8.8M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +5.8% | 460,629 | $8.5M |
| Voloridge Investment Management, LLC | 0.03% | Reduce -36.0% | 436,078 | $8.0M |
| Citigroup Inc. | 0.01% | Add +21.1% | 401,436 | $7.4M |
| Citadel Advisors | 0.01% | Reduce -66.9% | 400,859 | $7.4M |
| Burkehill Global Management, LP | 0.43% | Reduce -33.3% | 400,000 | $7.4M |
| UBS Group AG | 0.00% | Add +9.4% | 361,558 | $6.7M |
| Sei Investments Co. | 0.01% | Add +6.5% | 356,051 | $6.6M |
| Trexquant Investment LP | 0.07% | Add +5.4% | 347,479 | $6.4M |
| Evergreen Capital Management LLC | 0.15% | New | 346,813 | $6.4M |
| Verition Fund Management LLC | 0.04% | Add +1829.3% | 335,809 | $6.2M |
| Alyeska Investment Group, L.P. | 0.02% | Reduce -59.3% | 325,539 | $6.0M |
| Soros Fund Management | 0.14% | Reduce -48.5% | 322,600 | $5.9M |
| Jain Global LLC | 0.07% | Add +41.9% | 291,968 | $5.4M |
| Armistice Capital, LLC | 0.14% | New | 250,000 | $4.6M |
| Y-Intercept (Hong Kong) Ltd | 0.11% | New | 247,715 | $4.6M |
| Kornitzer Capital Management Inc. | 0.09% | New | 245,605 | $4.5M |
| Bank of New York Mellon Corp | 0.00% | Add +841.2% | 235,506 | $4.3M |
| Walleye Capital LLC | 0.04% | Reduce -39.0% | 219,439 | $4.0M |
| Northern Trust Corp. | 0.00% | Add +6.2% | 211,399 | $3.9M |
| Annis Gardner Whiting Capital Advisors, LLC | 0.78% | Add +723.1% | 205,525 | $3.8M |
| Capital Fund Management S.A. | 0.04% | Add +556.6% | 204,075 | $3.8M |
| Envestnet Asset Management Inc. | 0.00% | Reduce -20.4% | 203,556 | $3.8M |
| CIBC Private Wealth Group LLC | 0.01% | Reduce -3.0% | 188,137 | $3.5M |
| Algert Global LLC | 0.06% | Add +212.6% | 186,340 | $3.4M |
| State of Wisconsin Investment Board | 0.01% | Reduce -0.6% | 160,996 | $3.0M |
| Barclays PLC | 0.00% | Add +772.4% | 148,886 | $2.7M |
| Dark Forest Capital Management LP | 0.10% | New | 147,752 | $2.7M |
| King Luther Capital Management Corp. | 0.01% | Reduce -58.9% | 140,276 | $2.6M |
| 2Xideas AG | 0.53% | Reduce -22.1% | 136,006 | $2.5M |
| Deutsche Bank AG | 0.00% | Add +0.6% | 135,721 | $2.5M |
| WINTON GROUP Ltd | 0.09% | New | 131,500 | $2.4M |
| Swiss National Bank | 0.00% | Reduce -3.6% | 131,500 | $2.4M |
| BNP Paribas Financial Markets | 0.00% | Reduce -73.2% | 131,124 | $2.4M |
| Ossiam | 0.03% | New | 129,200 | $2.4M |
| Whetstone Capital Advisors, LLC | 0.57% | New | 112,307 | $2.1M |
| JPMorgan Chase & Co. | 0.00% | Add +299.2% | 109,843 | $2.0M |
| EFG Asset Management (North America) Corp. | 0.25% | Add +111.8% | 105,470 | $1.9M |
| Daiwa Securities Group Inc. | 0.01% | Reduce -6.1% | 105,086 | $1.9M |
| Raymond James Financial Inc. | 0.00% | Add +16.3% | 102,902 | $1.9M |
| Primecap Management Co. | 0.00% | Reduce -2.8% | 102,900 | $1.9M |
| Boothbay Fund Management, LLC | 0.05% | Reduce -18.4% | 98,680 | $1.8M |
| Engineers Gate Manager LP | 0.02% | Add +235.5% | 98,195 | $1.8M |
| Advantage Alpha Capital Partners LP | 0.49% | New | 88,199 | $1.6M |
| West Paces Advisors Inc. | 0.31% | Add +0.1% | 85,218 | $1.6M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -53.3% | 74,815 | $1.4M |
| Jump Financial, LLC | 0.02% | New | 67,323 | $1.2M |
| Jane Street Group, LLC | 0.00% | Reduce -64.3% | 65,884 | $1.2M |
| Public Employees Retirement System of Ohio | 0.00% | No change | 65,210 | $1.2M |
| Legal & General Group Plc | 0.00% | No change | 64,201 | $1.2M |
| Stifel Financial Corp. | 0.00% | Reduce -14.5% | 63,261 | $1.2M |
| California State Teachers Retirement System | 0.00% | Reduce -9.0% | 59,219 | $1.1M |
| Ameriprise Financial Inc. | 0.00% | Add +15.0% | 57,423 | $1.1M |
| Clearline Capital LP | 0.08% | New | 50,479 | $930K |
| Bessemer Group Inc. | 0.00% | Reduce -22.5% | 50,319 | $928K |
| FMR LLC | 0.00% | Add +1.1% | 46,138 | $850K |
| Cetera Investment Advisers | 0.00% | Add +270.1% | 44,810 | $826K |
| M&T Bank Corp | 0.00% | Reduce -17.5% | 44,400 | $819K |
| Voleon Capital Management LP | 0.02% | Reduce -46.9% | 43,396 | $800K |
| Simplex Trading, LLC | 0.02% | New | 38,590 | $711K |
| Graham Capital Management, L.P. | 0.04% | New | 37,863 | $698K |
| Quantbot Technologies LP | 0.02% | Reduce -38.6% | 34,779 | $641K |
| Montis Financial, LLC | 0.15% | Reduce -9.5% | 34,188 | $630K |
| Tudor Investment Corporation | 0.00% | Reduce -24.6% | 33,668 | $621K |
| Gibbs Wealth Management | 0.14% | New | 33,467 | $617K |
| Diversified Trust Co. | 0.01% | Reduce -23.1% | 32,487 | $599K |
| Norden Group LLC | 0.06% | Reduce -20.5% | 30,534 | $563K |
| Los Angeles Capital Management LLC | 0.00% | New | 29,970 | $552K |
| Janus Henderson Group PLC | 0.00% | No change | 29,294 | $540K |
"% of holder's portfolio" is OS's weight in each manager's 13F, not the share of Onestream Inc. the manager owns.