Quantum-Si Inc
QSI- Exchange
- Nasdaq
- Industry
- Measuring & Controlling Devices, NEC
- SEC CIK
- 0001816431
In the last 90 days, Quantum-Si Inc insiders filed 0 open-market purchases and 3 sales; 141 institutions reported holding it in 13F filings for Q2 2026, worth $46.8M in total; ARK Invest is the only superinvestor holding it.
13F holders, Q1 2025
Institutional positions in Quantum-Si Inc as of Mar 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 137
- +17 vs. Q4 2024
- Shares held
- 57.8M
- +4.44M (+8.3%) vs. Q4 2024
- Total value
- $69.3M
- −$74.7M (−51.9%) vs. Q4 2024
- New holders
- 39
- 41 more added
- Sold out
- 22
- 35 more reduced
1 institution that held it in Q4 2024 haven't filed for Q1 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2024: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting QSI on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 141 | $46.8M |
| Q1 2026 | 157 | $49.0M |
| Q4 2025 | 135 | $74.3M |
| Q3 2025 | 125 | $91.3M |
| Q2 2025 | 135 | $126.2M |
| Q1 2025 | 137 | $69.3M |
| Q4 2024 | 121 | $144.8M |
| Q3 2024 | 107 | $45.9M |
| Q2 2024 | 99 | $56.1M |
| Q1 2024 | 95 | $104.1M |
| Q4 2023 | 91 | $113.6M |
| Q3 2023 | 96 | $90.5M |
| Q2 2023 | 91 | $78.5M |
| Q1 2023 | 100 | $76.5M |
| Q4 2022 | 105 | $90.9M |
| Q3 2022 | 102 | $130.8M |
| Q2 2022 | 102 | $139.6M |
| Q1 2022 | 92 | $215.0M |
| Q4 2021 | 93 | $370.6M |
| Q3 2021 | 73 | $372.4M |
| Q2 2021 | 72 | $534.9M |
| Q1 2021 | 0 | $0 |
Institutions, Q1 2025
Shares, value and share of portfolio for each institution holding Quantum-Si Inc; share changes are against Q4 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Citigroup Inc | 84,459 | $101.4K | 0.00% | −5,789−6.4% | Reduced |
| Bank of America Corp | 88,495 | $106.2K | 0.00% | −23,376−20.9% | Reduced |
| Raymond James Financial Inc | 92,875 | $111.5K | 0.00% | +92,875 | New |
| AQR Capital Management LLC | 96,042 | $115.3K | 0.00% | −6,356−6.2% | Reduced |
| Invesco Ltd. | 103,657 | $124.4K | 0.00% | +66,336+177.7% | Added |
| Price T Rowe Associates Inc | 108,174 | $130.0K | 0.00% | −940−0.9% | Reduced |
| Alliancebernstein L.P. | 110,180 | $132.2K | 0.00% | +34,100+44.8% | Added |
| Barclays PLC | 120,888 | $145.1K | 0.00% | −29,728−19.7% | Reduced |
| Shay Capital LLC | 128,500 | $154.2K | 0.04% | −88,046−40.7% | Reduced |
| Guggenheim Capital LLC | 129,021 | $154.8K | 0.00% | −70,978−35.5% | Reduced |
| Citadel Advisors LLC | 138,498 | $166.2K | 0.00% | +138,498 | New |
| Rhumbline Advisers | 149,973 | $180.0K | 0.00% | +1,027+0.7% | Added |
| Bridgeway Capital Management, LLC | 196,100 | $235.3K | 0.01% | −100,000−33.8% | Reduced |
| Pathstone Holdings, LLC | 214,309 | $257.2K | 0.00% | +85,725+66.7% | Added |
| Green Alpha Advisors, LLC | 244,067 | $292.9K | 0.31% | +85,209+53.6% | Added |
| Gsa Capital Partners LLP | 246,192 | $295.0K | 0.03% | −128,086−34.2% | Reduced |
| Morgan Stanley | 287,488 | $345.0K | 0.00% | −3,192,980−91.7% | Reduced |
| Bank of New York Mellon Corp | 294,906 | $353.9K | 0.00% | +25,099+9.3% | Added |
| Knollwood Investment Advisory, LLC | 300,000 | $360.0K | 0.04% | 00.0% | Unchanged |
| Nuveen, LLC | 319,100 | $382.9K | 0.00% | +319,100 | New |
| Charles Schwab Investment Management Inc | 367,444 | $440.9K | 0.00% | +59,423+19.3% | Added |
| XTX Topco Ltd | 368,968 | $442.8K | 0.02% | +123,383+50.2% | Added |
| Goldman Sachs Group Inc | 441,314 | $529.6K | 0.00% | −560,816−56.0% | Reduced |
| UBS Group AG | 449,682 | $539.6K | 0.00% | −142,430−24.1% | Reduced |
| Fosun International Ltd | 743,935 | $892.7K | 0.25% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 796,930 | $956.3K | 0.00% | −205,943−20.5% | Reduced |
| Two Sigma Investments, LP | 816,975 | $980.4K | 0.00% | +664,292+435.1% | Added |
| Renaissance Technologies LLC | 871,756 | $1.05M | 0.00% | +326,800+60.0% | Added |
| Northern Trust Corp | 1,022,118 | $1.23M | 0.00% | +180,972+21.5% | Added |
| State Street Corp | 2,454,106 | $2.94M | 0.00% | +49,087+2.0% | Added |
| Geode Capital Management, LLC | 2,994,888 | $3.59M | 0.00% | +626,512+26.5% | Added |
| Millennium Management LLC | 3,934,285 | $4.72M | 0.00% | +3,934,285 | New |
| Nikko Asset Management Americas, Inc. | 5,811,430 | $6.92M | 0.09% | −153,778−2.6% | Reduced |
| Sumitomo Mitsui Trust Holdings, Inc. | 5,811,430 | $6.97M | 0.00% | −153,778−2.6% | Reduced |
| Vanguard Group Inc | 6,892,862 | $8.27M | 0.00% | +1,401,109+25.5% | Added |
| ARK Investment Management LLCSuperinvestorARK Invest | 8,713,501 | $10.5M | 0.10% | −135,149−1.5% | Reduced |
| BlackRock, Inc. | 9,440,243 | $11.3M | 0.00% | +1,002,596+11.9% | Added |
| Centiva Capital, LP | 0 | $0 | 0.00% | −143,176−100.0% | Sold out |
| Belvedere Trading LLC | 0 | $0 | 0.00% | −41,053−100.0% | Sold out |
| State of Wisconsin Investment Board | 0 | $0 | 0.00% | −36,330−100.0% | Sold out |
| Winton Group Ltd | 0 | $0 | 0.00% | −34,610−100.0% | Sold out |
| Axq Capital, LP | 0 | $0 | 0.00% | −34,067−100.0% | Sold out |
| Guidance Point Advisors, LLC | 0 | $0 | 0.00% | −25,742−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −23,845−100.0% | Sold out |
| Bravias Capital Group, LLC | 0 | $0 | 0.00% | −20,250−100.0% | Sold out |
| Alpine Global Management, LLC | 0 | $0 | 0.00% | −13,785−100.0% | Sold out |
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −13,488−100.0% | Sold out |
| Wealth Enhancement Advisory Services, LLC | 0 | $0 | 0.00% | −13,384−100.0% | Sold out |
| Jump Financial, LLC | 0 | $0 | 0.00% | −12,385−100.0% | Sold out |
| Dudley Capital Management, LLC | 0 | $0 | 0.00% | −11,000−100.0% | Sold out |
| Cubist Systematic Strategies, LLC | 0 | $0 | 0.00% | −7,305−100.0% | Sold out |
| Point72 (DIFC) Ltd | 0 | $0 | 0.00% | −6,575−100.0% | Sold out |
| Tucker Asset Management LLC | 0 | $0 | 0.00% | −1,470−100.0% | Sold out |
| Nelson, Van Denburg & Campbell Wealth Management Group, LLC | 0 | $0 | 0.00% | −1,357−100.0% | Sold out |
| Caitong International Asset Management Co., Ltd | 0 | $0 | 0.00% | −1,228−100.0% | Sold out |
| Steward Partners Investment Advisory, LLC | 0 | $0 | 0.00% | −1,000−100.0% | Sold out |
| Twin Tree Management, LP | 0 | $0 | 0.00% | −758−100.0% | Sold out |
| Eagle Bay Advisors LLC | 0 | $0 | 0.00% | −277−100.0% | Sold out |
| Parkside Financial Bank & Trust | 0 | $0 | 0.00% | −150−100.0% | Sold out |
| Nuveen Asset Management, LLC | – | – | – | – | Not filed |