QSI Quantum-Si Incorporated
Quantum-Si Incorporated (QSI) Institutional Ownership
What the institutions did with QSI 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.
Sign in or subscribeLargest holders
| Manager | Shares | % of reported |
|---|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC | 7.6M | 14.3% |
| ARK Investment Management LLC | 7.2M | 13.6% |
| BlackRock, Inc. | 5.2M | 9.9% |
| Sumitomo Mitsui Trust Group, Inc. | 3.9M | 7.4% |
| Amova Asset Management Americas, Inc. | 3.9M | 7.4% |
| MILLENNIUM MANAGEMENT LLC | 3.1M | 5.9% |
| UBS Group AG | 2.6M | 4.8% |
| AQR CAPITAL MANAGEMENT LLC | 2.3M | 4.4% |
| GEODE CAPITAL MANAGEMENT, LLC | 2.2M | 4.2% |
| JANE STREET GROUP, LLC | 2.1M | 4.1% |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1.1M | 2.1% |
| VANGUARD FIDUCIARY TRUST CO | 1.1M | 2.1% |
| STATE STREET CORP | 890.7K | 1.7% |
| Fosun International Ltd | 743.9K | 1.4% |
| RENAISSANCE TECHNOLOGIES LLC | 553.9K | 1.0% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 497.1K | 0.9% |
| GOLDMAN SACHS GROUP INC | 476.3K | 0.9% |
| NORTHERN TRUST CORP | 450.5K | 0.9% |
| Invesco Ltd. | 443.9K | 0.8% |
| BNP PARIBAS FINANCIAL MARKETS | 398.6K | 0.8% |
| IEQ CAPITAL, LLC | 350.8K | 0.7% |
| Aster Capital Management (DIFC) Ltd | 344.5K | 0.7% |
| MORGAN STANLEY | 323.5K | 0.6% |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd | 321.1K | 0.6% |
| Knollwood Investment Advisory, LLC | 300.0K | 0.6% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| BlackRock, Inc. | Reduced | 13.4M | 5.2M | -8.2M |
| MILLENNIUM MANAGEMENT LLC | New | 0 | 3.1M | +3.1M |
| STATE STREET CORP | Reduced | 3.8M | 890.7K | -2.9M |
| JANE STREET GROUP, LLC | New | 0 | 2.1M | +2.1M |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | 3.8M | 2.2M | -1.6M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Reduced | 1.5M | 497.1K | -1.0M |
| UBS Group AG | Increased | 1.7M | 2.6M | +859.4K |
| NORTHERN TRUST CORP | Reduced | 1.3M | 450.5K | -810.2K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 7.0M | 7.6M | +556.3K |
| Sumitomo Mitsui Trust Group, Inc. | Reduced | 4.4M | 3.9M | -506.4K |
| Amova Asset Management Americas, Inc. | Reduced | 4.4M | 3.9M | -506.4K |
| RENAISSANCE TECHNOLOGIES LLC | Increased | 117.9K | 553.9K | +436.0K |
| Nuveen, LLC | Reduced | 451.4K | 30.1K | -421.3K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Reduced | 457.6K | 84.6K | -373.0K |
| Bank of New York Mellon Corp | Reduced | 383.1K | 18.8K | -364.3K |
| BNP PARIBAS FINANCIAL MARKETS | Increased | 38.4K | 398.6K | +360.2K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | 1.5M | 1.1M | -347.8K |
| Aster Capital Management (DIFC) Ltd | New | 0 | 344.5K | +344.5K |
| ARK Investment Management LLC | Increased | 6.9M | 7.2M | +288.8K |
| ALLIANCEBERNSTEIN L.P. | Sold Out | 272.2K | 0 | -272.2K |
| XTX Topco Ltd | Reduced | 389.3K | 177.7K | -211.6K |
| CIBC Bancorp USA Inc. | Sold Out | 208.5K | 0 | -208.5K |
| MORGAN STANLEY | Increased | 129.9K | 323.5K | +193.5K |
| GROUP ONE TRADING LLC | Reduced | 284.0K | 107.5K | -176.5K |
| BARCLAYS PLC | Increased | 39.1K | 205.7K | +166.6K |
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.