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 |
|---|---|---|---|---|---|
| BlackRock, Inc. | 9,440,243 | $11.3M | 0.00% | +1,002,596+11.9% | Added |
| ARK Investment Management LLCSuperinvestorARK Invest | 8,713,501 | $10.5M | 0.10% | −135,149−1.5% | Reduced |
| Vanguard Group Inc | 6,892,862 | $8.27M | 0.00% | +1,401,109+25.5% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 5,811,430 | $6.97M | 0.00% | −153,778−2.6% | Reduced |
| Nikko Asset Management Americas, Inc. | 5,811,430 | $6.92M | 0.09% | −153,778−2.6% | Reduced |
| Millennium Management LLC | 3,934,285 | $4.72M | 0.00% | +3,934,285 | New |
| Geode Capital Management, LLC | 2,994,888 | $3.59M | 0.00% | +626,512+26.5% | Added |
| State Street Corp | 2,454,106 | $2.94M | 0.00% | +49,087+2.0% | Added |
| Northern Trust Corp | 1,022,118 | $1.23M | 0.00% | +180,972+21.5% | Added |
| Renaissance Technologies LLC | 871,756 | $1.05M | 0.00% | +326,800+60.0% | Added |
| Two Sigma Investments, LP | 816,975 | $980.4K | 0.00% | +664,292+435.1% | Added |
| Susquehanna International Group, LLP | 796,930 | $956.3K | 0.00% | −205,943−20.5% | Reduced |
| Fosun International Ltd | 743,935 | $892.7K | 0.25% | 00.0% | Unchanged |
| UBS Group AG | 449,682 | $539.6K | 0.00% | −142,430−24.1% | Reduced |
| Goldman Sachs Group Inc | 441,314 | $529.6K | 0.00% | −560,816−56.0% | Reduced |
| XTX Topco Ltd | 368,968 | $442.8K | 0.02% | +123,383+50.2% | Added |
| Charles Schwab Investment Management Inc | 367,444 | $440.9K | 0.00% | +59,423+19.3% | Added |
| Nuveen, LLC | 319,100 | $382.9K | 0.00% | +319,100 | New |
| Knollwood Investment Advisory, LLC | 300,000 | $360.0K | 0.04% | 00.0% | Unchanged |
| Bank of New York Mellon Corp | 294,906 | $353.9K | 0.00% | +25,099+9.3% | Added |
| Morgan Stanley | 287,488 | $345.0K | 0.00% | −3,192,980−91.7% | Reduced |
| Gsa Capital Partners LLP | 246,192 | $295.0K | 0.03% | −128,086−34.2% | Reduced |
| Green Alpha Advisors, LLC | 244,067 | $292.9K | 0.31% | +85,209+53.6% | Added |
| Pathstone Holdings, LLC | 214,309 | $257.2K | 0.00% | +85,725+66.7% | Added |
| Bridgeway Capital Management, LLC | 196,100 | $235.3K | 0.01% | −100,000−33.8% | Reduced |
| Rhumbline Advisers | 149,973 | $180.0K | 0.00% | +1,027+0.7% | Added |
| Citadel Advisors LLC | 138,498 | $166.2K | 0.00% | +138,498 | New |
| Guggenheim Capital LLC | 129,021 | $154.8K | 0.00% | −70,978−35.5% | Reduced |
| Shay Capital LLC | 128,500 | $154.2K | 0.04% | −88,046−40.7% | Reduced |
| Barclays PLC | 120,888 | $145.1K | 0.00% | −29,728−19.7% | Reduced |
| Alliancebernstein L.P. | 110,180 | $132.2K | 0.00% | +34,100+44.8% | Added |
| Price T Rowe Associates Inc | 108,174 | $130.0K | 0.00% | −940−0.9% | Reduced |
| Invesco Ltd. | 103,657 | $124.4K | 0.00% | +66,336+177.7% | Added |
| AQR Capital Management LLC | 96,042 | $115.3K | 0.00% | −6,356−6.2% | Reduced |
| Raymond James Financial Inc | 92,875 | $111.5K | 0.00% | +92,875 | New |
| Bank of America Corp | 88,495 | $106.2K | 0.00% | −23,376−20.9% | Reduced |
| Citigroup Inc | 84,459 | $101.4K | 0.00% | −5,789−6.4% | Reduced |
| Wells Fargo & Company | 83,333 | $100.0K | 0.00% | +11,353+15.8% | Added |
| Jefferies Financial Group Inc. | 83,031 | $99.6K | 0.00% | +83,031 | New |
| FMR LLC | 79,623 | $95.5K | 0.00% | −698−0.9% | Reduced |
| Two Sigma Advisers, LP | 78,900 | $94.7K | 0.00% | +78,900 | New |
| Ewa, LLC | 78,688 | $94.4K | 0.04% | +78,688 | New |
| Sculptor Capital LP | 78,200 | $93.8K | 0.00% | +78,200 | New |
| MetLife Investment Management | 76,015 | $91.2K | 0.00% | +76,015 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 70,552 | $84.7K | 0.00% | +13,546+23.8% | Added |
| Davy Global Fund Management Ltd | 69,944 | $83.9K | 0.01% | +36,042+106.3% | Added |
| Deutsche Bank AG | 67,522 | $81.0K | 0.00% | +34,962+107.4% | Added |
| Intech Investment Management LLC | 61,365 | $73.6K | 0.00% | +10,528+20.7% | Added |
| Callan Capital, LLC | 60,950 | $73.1K | 0.01% | +50,150+464.4% | Added |
| Corebridge Financial, Inc. | 58,876 | $70.7K | 0.00% | +9,086+18.2% | Added |
| JPMorgan Chase & Co | 57,651 | $69.2K | 0.00% | +12,794+28.5% | Added |
| Two Sigma Securities, LLC | 52,220 | $62.7K | 0.01% | +52,220 | New |
| Mariner, LLC | 48,005 | $57.6K | 0.00% | +14,566+43.6% | Added |
| Wolverine Trading, LLC | 40,458 | $51.4K | 0.00% | −71,477−63.9% | Reduced |
| Simplex Trading, LLC | 42,909 | $51.0K | 0.00% | −263,860−86.0% | Reduced |
| Commonwealth Equity Services, LLC | 40,868 | $49.0K | 0.00% | +9,855+31.8% | Added |
| SG Americas Securities, LLC | 40,079 | $48.0K | 0.00% | −27,509−40.7% | Reduced |
| Cambridge Investment Research Advisors, Inc. | 38,867 | $47.0K | 0.00% | 00.0% | Unchanged |
| Manufacturers Life Insurance Company, The | 38,518 | $46.2K | 0.00% | +3,668+10.5% | Added |
| Russell Investments Group, Ltd. | 38,257 | $45.9K | 0.00% | +29,204+322.6% | Added |
| Red Wave Investments LLC | 37,000 | $44.4K | 0.02% | 00.0% | Unchanged |
| Sanctuary Advisors, LLC | 36,782 | $44.1K | 0.00% | +1,539+4.4% | Added |
| Virtu Financial LLC | 34,830 | $42.0K | 0.00% | +34,830 | New |
| Captrust Financial Advisors | 34,583 | $41.5K | 0.00% | +34,583 | New |
| SEI Investments Co | 33,103 | $39.7K | 0.00% | 00.0% | Unchanged |
| Police & Firemen's Retirement System of New Jersey | 31,134 | $37.4K | 0.00% | 00.0% | Unchanged |
| Atom Investors LP | 30,172 | $36.2K | 0.00% | +30,172 | New |
| Voya Investment Management LLC | 29,552 | $35.5K | 0.00% | −1,311−4.2% | Reduced |
| Mercer Global Advisors Inc | 27,113 | $32.5K | 0.00% | −3,846−12.4% | Reduced |
| Wealth Management Associates, Inc. | 26,950 | $32.3K | 0.01% | −8,100−23.1% | Reduced |
| CIBC World Markets Corp | 26,667 | $32.0K | 0.00% | +26,667 | New |
| New York State Common Retirement Fund | 26,084 | $31.3K | 0.00% | 00.0% | Unchanged |
| ProShare Advisors LLC | 26,016 | $31.2K | 0.00% | −2,188−7.8% | Reduced |
| Leonteq Securities AG | 25,000 | $30.1K | 0.00% | +25,000 | New |
| HBW Advisory Services LLC | 24,243 | $29.1K | 0.00% | +24,243 | New |
| JustInvest LLC | 23,477 | $28.2K | 0.00% | +3,532+17.7% | Added |
| WestHill Financial Advisors, Inc. | 21,727 | $26.1K | 0.01% | +21,727 | New |
| Tower Research Capital LLC (TRC) | 21,026 | $25.2K | 0.00% | −2,321−9.9% | Reduced |
| LPL Financial LLC | 20,112 | $24.1K | 0.00% | +20,112 | New |
| CIBC World Markets Inc. | 20,011 | $24.0K | 0.00% | +20,011 | New |
| Hollencrest Capital Management | 20,000 | $24.0K | 0.00% | +20,000 | New |
| Cetera Investment Advisers | 19,101 | $22.9K | 0.00% | +5,721+42.8% | Added |
| DLK Investment Management, LLC | 19,000 | $22.8K | 0.01% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 18,970 | $22.8K | 0.00% | −3,291−14.8% | Reduced |
| Stratos Wealth Advisors, LLC | 18,310 | $22.0K | 0.00% | +18,310 | New |
| Victory Capital Management Inc | 16,593 | $19.9K | 0.00% | +4,529+37.5% | Added |
| Neuberger Berman Group LLC | 15,919 | $19.1K | 0.00% | +15,919 | New |
| Kestra Advisory Services, LLC | 15,090 | $18.1K | 0.00% | +15,090 | New |
| Mark Sheptoff Financial Planning, LLC | 14,500 | $17.4K | 0.01% | +7,500+107.1% | Added |
| Flagship Private Wealth, LLC | 14,158 | $17.0K | 0.01% | 00.0% | Unchanged |
| HSBC Holdings PLC | 13,987 | $16.6K | 0.00% | +2,245+19.1% | Added |
| Procyon Private Wealth Partners, LLC | 13,671 | $16.4K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 13,429 | $16.0K | 0.00% | +813+6.4% | Added |
| State Board of Administration of Florida Retirement System | 12,300 | $14.8K | 0.00% | +12,300 | New |
| Dash Acquisitions Inc. | 10,000 | $14.6K | 0.00% | +10,000 | New |
| Abel Hall, LLC | 12,008 | $14.4K | 0.01% | +1,576+15.1% | Added |
| Thoroughbred Financial Services, LLC | 12,000 | $14.0K | 0.00% | −21,000−63.6% | Reduced |
| National Bank of Canada | 11,100 | $13.3K | 0.00% | +11,100 | New |
| Principal Securities, Inc. | 4,912 | $13.3K | 0.00% | 00.0% | Unchanged |
| Eqis Capital Management, Inc. | 11,051 | $13.3K | 0.00% | −5,414−32.9% | Reduced |