# ONESTREAM INC (OS)

> Institutional ownership reported to the SEC as of Q1 2026, from Form 13F filings. Source: https://holderbook.com/stocks/OS/

- Reporting holders: 182
- Reported value: $2.2B
- Held through calls: 0.1%
- Held through puts: 0.1%

A 13F reports long US equity positions only. Shorts, bonds, foreign listings and cash are not visible here, and positions are disclosed up to 45 days after the quarter ends.

## Largest holders

| Manager | Value | Shares | Share of their book | Quarters held |
|---|---|---|---|---|
| [GLAZER CAPITAL, LLC](https://holderbook.com/funds/1076809-glazer-capital-llc/) | $180.9M | 7,537,536 | 3.8% | 1 |
| [VANGUARD PORTFOLIO MANAGEMENT LLC](https://holderbook.com/funds/2100121-vanguard-portfolio-management-llc/) | $117.6M | 4,900,450 | 0.0% | 1 |
| [Temasek Holdings (Private) Ltd](https://holderbook.com/funds/1021944-temasek-holdings-private-ltd/) | $102.4M | 4,266,714 | 0.3% | 7 |
| [FIL Ltd](https://holderbook.com/funds/318989-fil-ltd/) | $95.8M | 3,992,145 | 0.1% | 1 |
| [VANGUARD CAPITAL MANAGEMENT LLC](https://holderbook.com/funds/2100119-vanguard-capital-management-llc/) | $93.2M | 3,882,231 | 0.0% | 1 |
| [AQR Arbitrage LLC](https://holderbook.com/funds/1167456-aqr-arbitrage-llc/) | $81.4M | 3,393,367 | 1.3% | 1 |
| [NEXPOINT ASSET MANAGEMENT, L.P.](https://holderbook.com/funds/1469877-nexpoint-asset-management-l-p/) | $80.6M | 3,358,217 | 5.4% | 1 |
| [O'Connor Alternative Investments LLC](https://holderbook.com/funds/2081629-o-connor-alternative-investments-llc/) | $76.5M | 3,186,804 | 4.0% | 1 |
| [Polar Asset Management Partners Inc.](https://holderbook.com/funds/1326389-polar-asset-management-partners-inc/) | $70.7M | 2,944,378 | 1.4% | 1 |
| [MILLENNIUM MANAGEMENT LLC](https://holderbook.com/funds/1273087-millennium-management-llc/) | $59.3M | 2,471,107 | 0.0% | 7 |
| [BlackRock, Inc.](https://holderbook.com/funds/2012383-blackrock-inc/) | $56.1M | 2,339,550 | 0.0% | 7 |
| [UBS Group AG](https://holderbook.com/funds/1610520-ubs-group-ag/) | $54.2M | 2,257,069 | 0.0% | 6 |
| [Man Group plc](https://holderbook.com/funds/1637460-man-group-plc/) | $52.9M | 2,204,520 | 0.1% | 1 |
| [GOLDMAN SACHS GROUP INC](https://holderbook.com/funds/886982-goldman-sachs-group-inc/) | $47.7M | 1,985,820 | 0.0% | 7 |
| [CITADEL ADVISORS LLC](https://holderbook.com/funds/1423053-citadel-advisors-llc/) | $45.9M | 1,890,118 | 0.0% | 7 |
| [Pentwater Capital Management LP](https://holderbook.com/funds/1425851-pentwater-capital-management-lp/) | $45.4M | 1,890,000 | 0.2% | 1 |
| [First Trust Capital Management L.P.](https://holderbook.com/funds/1604488-first-trust-capital-management-l-p/) | $44.2M | 1,842,189 | 2.3% | 1 |
| [SOROS FUND MANAGEMENT LLC](https://holderbook.com/funds/1029160-soros-fund-management-llc/) | $43.9M | 1,830,222 | 0.5% | 7 |
| [TIG Advisors, LLC](https://holderbook.com/funds/1358253-tig-advisors-llc/) | $41.7M | 1,738,231 | 1.9% | 1 |
| [MORGAN STANLEY](https://holderbook.com/funds/895421-morgan-stanley/) | $39.6M | 1,651,031 | 0.0% | 7 |
| [HSBC HOLDINGS PLC](https://holderbook.com/funds/873630-hsbc-holdings-plc/) | $38.3M | 1,595,839 | 0.0% | 2 |
| [JPMORGAN CHASE & CO](https://holderbook.com/funds/19617-jpmorgan-chase-co/) | $35.2M | 1,467,884 | 0.0% | 7 |
| [ODDO BHF ASSET MANAGEMENT SAS](https://holderbook.com/funds/1686970-oddo-bhf-asset-management-sas/) | $34.8M | 1,450,000 | 1.4% | 1 |
| [HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND](https://holderbook.com/funds/1535845-healthcare-of-ontario-pension-plan-trust-fund/) | $29.6M | 1,234,961 | 0.0% | 7 |
| [ALLIANCEBERNSTEIN L.P.](https://holderbook.com/funds/1109448-alliancebernstein-l-p/) | $28.2M | 1,535,061 | 0.0% | 1 |

## Quarter by quarter

| Quarter | Holders | Reported value |
|---|---|---|
| Q1 2026 | 182 | $2.2B |
| Q4 2025 | 187 | $1.6B |
| Q3 2025 | 185 | $1.5B |
| Q2 2025 | 188 | $2.5B |
| Q1 2025 | 144 | $1.5B |
| Q4 2024 | 162 | $1.5B |
| Q3 2024 | 116 | $4.8B |