OSS One Stop Systems, Inc.
One Stop Systems, Inc. (OSS) Institutional Ownership
What the institutions did with OSS last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 1.8M | 17.0% |
| JANE STREET GROUP, LLC | 1.3M | 12.1% |
| VANGUARD CAPITAL MANAGEMENT LLC | 974.6K | 9.0% |
| GEODE CAPITAL MANAGEMENT, LLC | 572.9K | 5.3% |
| BARD ASSOCIATES INC | 526.4K | 4.9% |
| Palisades Investment Partners, LLC | 414.4K | 3.8% |
| RENAISSANCE TECHNOLOGIES LLC | 407.9K | 3.8% |
| STATE STREET CORP | 384.3K | 3.6% |
| MILLENNIUM MANAGEMENT LLC | 337.7K | 3.1% |
| Qube Research & Technologies Ltd | 318.9K | 2.9% |
| Cambridge Investment Research Advisors, Inc. | 298.6K | 2.8% |
| NORTHERN TRUST CORP | 178.1K | 1.6% |
| TWO SIGMA INVESTMENTS, LP | 162.2K | 1.5% |
| VANGUARD FIDUCIARY TRUST CO | 157.4K | 1.5% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 155.4K | 1.4% |
| NEW YORK STATE COMMON RETIREMENT FUND | 147.3K | 1.4% |
| DIMENSIONAL FUND ADVISORS LP | 146.9K | 1.4% |
| Squarepoint Ops LLC | 131.3K | 1.2% |
| Informed Momentum Co LLC | 130.6K | 1.2% |
| DNB Asset Management AS | 118.8K | 1.1% |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 99.3K | 0.9% |
| Trexquant Investment LP | 98.4K | 0.9% |
| MORGAN STANLEY | 88.9K | 0.8% |
| OSAIC HOLDINGS, INC. | 86.5K | 0.8% |
| SEI INVESTMENTS CO | 84.4K | 0.8% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| BlackRock, Inc. | Increased | 597.3K | 1.8M | +1.2M |
| JANE STREET GROUP, LLC | Increased | 874.6K | 1.3M | +434.9K |
| MARSHALL WACE, LLP | Sold Out | 419.0K | 0 | -419.0K |
| Palisades Investment Partners, LLC | New | 0 | 414.4K | +414.4K |
| MORGAN STANLEY | Reduced | 431.9K | 88.9K | -343.0K |
| UBS Group AG | Reduced | 407.0K | 72.2K | -334.8K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 252.5K | 572.9K | +320.5K |
| Qube Research & Technologies Ltd | New | 0 | 318.9K | +318.9K |
| CITADEL ADVISORS LLC | Reduced | 356.7K | 71.2K | -285.5K |
| STATE STREET CORP | Increased | 101.7K | 384.3K | +282.6K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Sold Out | 236.3K | 0 | -236.3K |
| TWO SIGMA INVESTMENTS, LP | New | 0 | 162.2K | +162.2K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New | 0 | 155.4K | +155.4K |
| Cambridge Investment Research Advisors, Inc. | Increased | 145.6K | 298.6K | +153.0K |
| RENAISSANCE TECHNOLOGIES LLC | Increased | 260.0K | 407.9K | +147.9K |
| NEW YORK STATE COMMON RETIREMENT FUND | New | 0 | 147.3K | +147.3K |
| DIMENSIONAL FUND ADVISORS LP | New | 0 | 146.9K | +146.9K |
| DNB Asset Management AS | Reduced | 252.7K | 118.8K | -134.0K |
| NORTHERN TRUST CORP | Increased | 47.0K | 178.1K | +131.1K |
| Trexquant Investment LP | Reduced | 217.8K | 98.4K | -119.4K |
| OSAIC HOLDINGS, INC. | Increased | 1.6K | 86.5K | +84.9K |
| SEI INVESTMENTS CO | Reduced | 166.6K | 84.4K | -82.2K |
| HRT FINANCIAL LP | Sold Out | 79.0K | 0 | -79.0K |
| Squarepoint Ops LLC | Increased | 58.5K | 131.3K | +72.9K |
| Russell Investments Group, Ltd. | New | 0 | 66.6K | +66.6K |
| THOMPSON SIEGEL & WALMSLEY LLC | Reduced | 97.0K | 31.8K | -65.2K |
| OXFORD ASSET MANAGEMENT LLP | Sold Out | 64.4K | 0 | -64.4K |
| MILLENNIUM MANAGEMENT LLC | Reduced | 400.7K | 337.7K | -63.0K |
| Bank of New York Mellon Corp | New | 0 | 62.5K | +62.5K |
| RAYMOND JAMES FINANCIAL INC | New | 0 | 61.9K | +61.9K |
| Virtu Financial LLC | Sold Out | 61.5K | 0 | -61.5K |
| 683 Capital Management, LLC | Sold Out | 60.0K | 0 | -60.0K |
| LPL Financial LLC | New | 0 | 54.2K | +54.2K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Increased | 12.9K | 65.3K | +52.4K |
| XTX Topco Ltd | Sold Out | 50.9K | 0 | -50.9K |
| Polymer Capital Management (HK) LTD | New | 0 | 38.0K | +38.0K |
| Inspire Investing, LLC | New | 0 | 38.0K | +38.0K |
| Hudson Bay Capital Management LP | Sold Out | 37.4K | 0 | -37.4K |
| Nuveen, LLC | New | 0 | 36.3K | +36.3K |
| Centiva Capital, LP | Sold Out | 33.6K | 0 | -33.6K |
| Calamos Advisors LLC | New | 0 | 32.0K | +32.0K |
| Brevan Howard Capital Management LP | Reduced | 43.2K | 12.2K | -31.0K |
| Optimus Capital Advisors, LLC | New | 0 | 30.0K | +30.0K |
| Schonfeld Strategic Advisors LLC | Sold Out | 29.5K | 0 | -29.5K |
| Hillsdale Investment Management Inc. | Sold Out | 28.8K | 0 | -28.8K |
| VANGUARD FIDUCIARY TRUST CO | Increased | 128.8K | 157.4K | +28.6K |
| RHUMBLINE ADVISERS | New | 0 | 27.9K | +27.9K |
| ACADIAN ASSET MANAGEMENT LLC | New | 0 | 27.3K | +27.3K |
| CANTOR FITZGERALD, L. P. | New | 0 | 26.1K | +26.1K |
| WELLS FARGO & COMPANY/MN | Increased | 1.0K | 26.8K | +25.8K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | Increased | 73.9K | 99.3K | +25.4K |
| MANGROVE PARTNERS IM, LLC | Sold Out | 23.9K | 0 | -23.9K |
| DEUTSCHE BANK AG\ | New | 0 | 22.3K | +22.3K |
| FOX RUN MANAGEMENT, L.L.C. | New | 0 | 22.2K | +22.2K |
| CITIGROUP INC | Reduced | 75.7K | 55.0K | -20.7K |
| SG Americas Securities, LLC | Increased | 28.0K | 47.0K | +19.0K |
| PRICE T ROWE ASSOCIATES INC /MD/ | New | 0 | 18.5K | +18.5K |
| LANDSCAPE CAPITAL MANAGEMENT, L.L.C. | Sold Out | 17.3K | 0 | -17.3K |
| ALLIANCEBERNSTEIN L.P. | New | 0 | 16.8K | +16.8K |
| Savant Capital, LLC | New | 0 | 16.0K | +16.0K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.