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, Q4 2021
Institutional positions in Quantum-Si Inc as of Dec 31, 2021. 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
- 93
- +20 vs. Q3 2021
- Shares held
- 47.1M
- +2.49M (+5.6%) vs. Q3 2021
- Total value
- $370.6M
- −$1.86M (−0.5%) vs. Q3 2021
- New holders
- 36
- 22 more added
- Sold out
- 16
- 15 more reduced
Compare with Q3 2021: 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, Q4 2021
Shares, value and share of portfolio for each institution holding Quantum-Si Inc; share changes are against Q3 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| ARK Investment Management LLCSuperinvestorARK Invest | 13,067,150 | $102.8M | 0.31% | +368,769+2.9% | Added |
| Glenview Capital Management, LLC | 6,000,000 | $47.2M | 1.02% | 00.0% | Unchanged |
| Foresite Capital Management IV, LLC | 4,463,619 | $35.1M | 7.23% | 00.0% | Unchanged |
| Capital International Investors | 2,500,000 | $19.7M | 0.00% | 00.0% | Unchanged |
| Price T Rowe Associates Inc | 2,359,250 | $18.6M | 0.00% | +164,650+7.5% | Added |
| Foresite Capital Management V, LLC | 2,342,061 | $18.4M | 4.53% | 00.0% | Unchanged |
| Vanguard Group Inc | 1,799,315 | $14.2M | 0.00% | +265,712+17.3% | Added |
| Foresite Capital Opportunity Management V, LLC | 1,598,125 | $12.6M | 8.43% | +1,598,125 | New |
| BlackRock Inc. | 1,532,702 | $12.1M | 0.00% | +378,586+32.8% | Added |
| Deerfield Management Company, L.P. (Series C) | 1,400,000 | $11.0M | 0.23% | 00.0% | Unchanged |
| Nikko Asset Management Americas, Inc. | 1,307,420 | $10.5M | 0.06% | −17,064−1.3% | Reduced |
| Sumitomo Mitsui Trust Holdings, Inc. | 1,307,420 | $10.3M | 0.01% | −17,064−1.3% | Reduced |
| Geode Capital Management, LLC | 766,910 | $6.04M | 0.00% | +2,992+0.4% | Added |
| Guggenheim Capital LLC | 745,169 | $5.86M | 0.03% | +153,711+26.0% | Added |
| Fosun International Ltd | 743,935 | $5.86M | 0.33% | −10.0% | Reduced |
| Rubric Capital Management LP | 672,385 | $5.29M | 0.25% | 00.0% | Unchanged |
| Goldman Sachs Group Inc | 525,883 | $4.14M | 0.00% | +362,832+222.5% | Added |
| Alyeska Investment Group, L.P. | 501,756 | $3.95M | 0.05% | +501,756 | New |
| Neumann Advisory Hong Kong Ltd | 492,733 | $3.88M | 0.67% | 00.0% | Unchanged |
| State Street Corp | 390,814 | $3.08M | 0.00% | +137,914+54.5% | Added |
| HRT Financial LP | 263,314 | $2.07M | 0.01% | +263,314 | New |
| Swiss National Bank | 179,400 | $1.41M | 0.00% | +179,400 | New |
| Northern Trust Corp | 168,878 | $1.33M | 0.00% | +23,945+16.5% | Added |
| TD Asset Management Inc | 150,662 | $1.19M | 0.00% | 00.0% | Unchanged |
| Ikarian Capital, LLC | 144,406 | $1.14M | 0.33% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 110,598 | $870.0K | 0.00% | −48,470−30.5% | Reduced |
| Cubist Systematic Strategies, LLC | 106,436 | $838.0K | 0.01% | +39,136+58.2% | Added |
| Morgan Stanley | 84,536 | $665.0K | 0.00% | +5,128+6.5% | Added |
| UBS Asset Management Americas Inc | 82,500 | $649.3K | 0.00% | +82,500 | New |
| Marshall Wace, LLP | 77,816 | $612.0K | 0.00% | +77,816 | New |
| Intrepid Family Office LLC | 75,000 | $590.0K | 0.69% | +75,000 | New |
| California State Teachers Retirement System | 68,851 | $542.0K | 0.00% | +68,851 | New |
| Westchester Capital Management, LLC | 64,964 | $511.0K | 0.02% | 00.0% | Unchanged |
| LMR Partners LLP | 61,794 | $486.0K | 0.01% | +61,794 | New |
| Credit Suisse AG | 48,204 | $379.0K | 0.00% | +48,204 | New |
| Virtu Financial LLC | 43,437 | $342.0K | 0.03% | +26,502+156.5% | Added |
| Red Wave Investments LLC | 37,000 | $291.0K | 0.10% | 00.0% | Unchanged |
| Royal Bank of Canada | 32,789 | $258.0K | 0.00% | −20,211−38.1% | Reduced |
| Bank of New York Mellon Corp | 32,200 | $253.0K | 0.00% | 00.0% | Unchanged |
| D. E. Shaw & Co., Inc. | 32,131 | $253.0K | 0.00% | +32,131 | New |
| Charles Schwab Investment Management Inc | 32,018 | $252.0K | 0.00% | 00.0% | Unchanged |
| Asset Management Corp | 31,011 | $244.0K | 0.14% | −28,433−47.8% | Reduced |
| Raymond James Financial Services Advisors, Inc. | 30,444 | $240.0K | 0.00% | 00.0% | Unchanged |
| UBS Group AG | 26,046 | $205.0K | 0.00% | +4,821+22.7% | Added |
| Guidance Point Advisors, LLC | 25,742 | $202.0K | 0.07% | 00.0% | Unchanged |
| Bank of America Corp | 25,545 | $201.0K | 0.00% | +10,497+69.8% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 23,634 | $186.0K | 0.00% | +23,634 | New |
| ExodusPoint Capital Management, LP | 23,534 | $185.0K | 0.00% | +23,534 | New |
| Private Advisor Group, LLC | 23,385 | $184.0K | 0.00% | −17,135−42.3% | Reduced |
| Cambridge Investment Research Advisors, Inc. | 23,257 | $183.0K | 0.00% | +550+2.4% | Added |
| Paloma Partners Management Co | 22,975 | $181.0K | 0.01% | +22,975 | New |
| Wells Fargo & Company | 22,640 | $178.0K | 0.00% | −57,294−71.7% | Reduced |
| Janus Henderson Group PLC | 21,957 | $173.0K | 0.00% | +21,957 | New |
| Arizona State Retirement System | 21,942 | $173.0K | 0.00% | +21,942 | New |
| Citadel Advisors LLC | 21,414 | $168.0K | 0.00% | +21,414 | New |
| Squarepoint Ops LLC | 20,572 | $162.0K | 0.00% | +20,572 | New |
| D.A. Davidson & Co. | 20,000 | $157.0K | 0.00% | +20,000 | New |
| Legal & General Group Plc | 19,560 | $154.0K | 0.00% | +19,560 | New |
| Clearline Capital LP | 79,480 | $143.0K | 0.02% | −298,417−79.0% | Reduced |
| Wolverine Trading, LLC | 17,403 | $136.0K | 0.00% | +3,006+20.9% | Added |
| Mirabella Financial Services LLP | 16,994 | $134.0K | 0.01% | +16,994 | New |
| Wealth Management Associates, Inc. | 16,975 | $133.6K | 0.07% | +950+5.9% | Added |
| ProShare Advisors LLC | 16,543 | $130.0K | 0.00% | +16,543 | New |
| Teacher Retirement System of Texas | 15,537 | $122.0K | 0.00% | +15,537 | New |
| Flagship Private Wealth, LLC | 14,158 | $111.0K | 0.08% | 00.0% | Unchanged |
| Principal Financial Group Inc | 13,939 | $110.0K | 0.00% | +13,939 | New |
| Procyon Private Wealth Partners, LLC | 13,671 | $108.0K | 0.02% | −40−0.3% | Reduced |
| Boothbay Fund Management, LLC | 13,526 | $106.0K | 0.00% | 00.0% | Unchanged |
| Dynamic Technology Lab Private Ltd | 12,626 | $99.0K | 0.01% | +12,626 | New |
| Abacus Planning Group, Inc. | 12,510 | $98.0K | 0.03% | +12,510 | New |
| Dynamic Advisor Solutions LLC | 11,650 | $92.0K | 0.01% | +11,650 | New |
| JPMorgan Chase & Co | 10,791 | $85.0K | 0.00% | +10,791 | New |
| Qube Research & Technologies Ltd | 10,252 | $81.0K | 0.00% | +10,252 | New |
| Penserra Capital Management LLC | 5,435 | $42.0K | 0.00% | +393+7.8% | Added |
| Citigroup Inc | 5,108 | $40.0K | 0.00% | −3,025−37.2% | Reduced |
| Advisor Group Holdings, Inc. | 3,898 | $31.0K | 0.00% | +778+24.9% | Added |
| Edge Wealth Management LLC | 2,499 | $20.0K | 0.00% | 00.0% | Unchanged |
| Wolff Wiese Magana LLC | 2,000 | $16.0K | 0.01% | +1,200+150.0% | Added |
| Quantbot Technologies LP | 2,094 | $16.0K | 0.00% | +2,073+9,871.4% | Added |
| TD Waterhouse Canada Inc. | 2,025 | $15.6K | 0.00% | +2,025 | New |
| Tower Research Capital LLC (TRC) | 1,658 | $13.0K | 0.00% | +1,630+5,821.4% | Added |
| American Portfolios Advisors | 1,450 | $11.4K | 0.00% | −2,050−58.6% | Reduced |
| Reilly Financial Advisors, LLC | 1,010 | $8.00K | 0.00% | −1,100−52.1% | Reduced |
| US Bancorp | 800 | $6.00K | 0.00% | +800 | New |
| CWM, LLC | 807 | $6.00K | 0.00% | +807 | New |
| Signaturefd, LLC | 600 | $5.00K | 0.00% | +600 | New |
| First Manhattan Co | 400 | $3.00K | 0.00% | +400 | New |
| Daiwa Securities Group Inc. | 343 | $3.00K | 0.00% | +343 | New |
| Cutler Group LP | 300 | $2.00K | 0.00% | −3,591−92.3% | Reduced |
| Total Clarity Wealth Management, Inc. | 250 | $2.00K | 0.00% | −500−66.7% | Reduced |
| Concord Wealth Partners | 300 | $2.00K | 0.00% | 00.0% | Unchanged |
| Eagle Bay Advisors LLC | 277 | $2.00K | 0.00% | 00.0% | Unchanged |
| FMR LLC | 16 | $0 | 0.00% | +16 | New |
| Farallon Capital Management, L.L.C. | 0 | $0 | 0.00% | −1,000,000−100.0% | Sold out |
| Blackstone Group Inc. | 0 | $0 | 0.00% | −850,000−100.0% | Sold out |
| Millennium Management LLC | 0 | $0 | 0.00% | −208,722−100.0% | Sold out |
| Stifel Financial Corp | 0 | $0 | 0.00% | −54,292−100.0% | Sold out |
| Kepos Capital LP | 0 | $0 | 0.00% | −38,500−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −25,880−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −24,831−100.0% | Sold out |