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