95 institutions reported holding $75.8M of ONE STOP SYS INC (OSS) in SEC 13F filings for 2026-03-31. Largest institutional holders: JANE STREET GROUP, LLC ($7.7M), VANGUARD CAPITAL MANAGEMENT LLC ($7.3M), CITADEL ADVISORS LLC ($5.6M), SUSQUEHANNA INTERNATIONAL GROUP, LLP ($5.0M), BlackRock, Inc. ($4.5M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | JANE STREET GROUP, LLC | $7.7M | 1.0M | Added |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | $7.3M | 959,588 | New |
| 3 | CITADEL ADVISORS LLC | $5.6M | 744,976 | Added |
| 4 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $5.0M | 655,299 | Added |
| 5 | BlackRock, Inc. | $4.5M | 597,303 | Added |
| 6 | BARD ASSOCIATES INC | $4.1M | 540,666 | Trimmed |
| 7 | GROUP ONE TRADING LLC | $3.8M | 507,200 | Added |
| 8 | MORGAN STANLEY | $3.3M | 431,919 | Added |
| 9 | MARSHALL WACE, LLP | $3.2M | 418,978 | Added |
| 10 | UBS Group AG | $3.1M | 407,014 | Added |
| 11 | MILLENNIUM MANAGEMENT LLC | $3.0M | 400,729 | Added |
| 12 | RENAISSANCE TECHNOLOGIES LLC | $2.0M | 259,960 | Trimmed |
| 13 | DNB ASSET MANAGEMENT AS | $1.9M | 252,733 | Added |
| 14 | GEODE CAPITAL MANAGEMENT, LLC | $1.9M | 252,453 | Added |
| 15 | Trexquant Investment LP | $1.6M | 217,829 | Trimmed |
| 16 | SEI INVESTMENTS CO | $1.3M | 166,632 | Added |
| 17 | Cambridge Investment Research Advisors, Inc. | $1.1M | 145,624 | Added |
| 18 | Informed Momentum Co LLC | $1.0M | 135,989 | Trimmed |
| 19 | VANGUARD FIDUCIARY TRUST CO | $974,706 | 128,759 | New |
| 20 | IMC-Chicago, LLC | $842,443 | 111,287 | Added |
| 21 | STATE STREET CORP | $769,687 | 101,676 | Added |
| 22 | SIMPLEX TRADING, LLC | $762,299 | 100,700 | Added |
| 23 | THOMPSON SIEGEL & WALMSLEY LLC | $734,000 | 96,963 | Trimmed |
| 24 | HRT FINANCIAL LP | $598,000 | 79,005 | New |
| 25 | GOLDMAN SACHS GROUP INC | $583,163 | 77,036 | Trimmed |
Source: SEC Form 13F filings · as of 2026-03-31