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, Q3 2021
Institutional positions in Quantum-Si Inc as of Sep 30, 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
- 73
- +1 vs. Q2 2021
- Shares held
- 44.6M
- +208.6K (+0.5%) vs. Q2 2021
- Total value
- $372.4M
- −$162.5M (−30.4%) vs. Q2 2021
- New holders
- 25
- 17 more added
- Sold out
- 24
- 14 more reduced
Compare with Q2 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, Q3 2021
Shares, value and share of portfolio for each institution holding Quantum-Si Inc; share changes are against Q2 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| ARK Investment Management LLCSuperinvestorARK Invest | 12,698,381 | $105.9M | 0.25% | +8,650,078+213.7% | Added |
| Glenview Capital Management, LLC | 6,000,000 | $50.0M | 0.91% | −1,187,091−16.5% | Reduced |
| Foresite Capital Management IV, LLC | 4,463,619 | $37.2M | 5.48% | 00.0% | Unchanged |
| Capital International Investors | 2,500,000 | $20.9M | 0.00% | 00.0% | Unchanged |
| Foresite Capital Management V, LLC | 2,342,061 | $19.5M | 6.07% | 00.0% | Unchanged |
| Price T Rowe Associates Inc | 2,194,600 | $18.3M | 0.00% | 00.0% | Unchanged |
| Vanguard Group Inc | 1,533,603 | $12.8M | 0.00% | +1,533,603 | New |
| Deerfield Management Company, L.P. (Series C) | 1,400,000 | $11.7M | 0.23% | 00.0% | Unchanged |
| Nikko Asset Management Americas, Inc. | 1,324,484 | $11.2M | 0.05% | +41,483+3.2% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 1,324,484 | $11.0M | 0.01% | +63,856+5.1% | Added |
| BlackRock Inc. | 1,154,116 | $9.63M | 0.00% | +1,154,116 | New |
| Farallon Capital Management, L.L.C. | 1,000,000 | $8.34M | 0.04% | −750,000−42.9% | Reduced |
| Blackstone Group Inc. | 850,000 | $7.09M | 0.02% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 763,918 | $6.37M | 0.00% | +702,500+1,143.8% | Added |
| Fosun International Ltd | 743,936 | $6.20M | 0.32% | 00.0% | Unchanged |
| Rubric Capital Management LP | 672,385 | $5.61M | 0.32% | +179,372+36.4% | Added |
| Guggenheim Capital LLC | 591,458 | $4.93M | 0.03% | +591,458 | New |
| Neumann Advisory Hong Kong Ltd | 492,733 | $4.11M | 0.73% | +492,733 | New |
| Clearline Capital LP | 377,897 | $3.15M | 0.41% | −12,256−3.1% | Reduced |
| State Street Corp | 252,900 | $2.11M | 0.00% | +252,900 | New |
| Millennium Management LLC | 208,722 | $1.74M | 0.00% | −2,541,278−92.4% | Reduced |
| Goldman Sachs Group Inc | 163,051 | $1.36M | 0.00% | +152,630+1,464.6% | Added |
| Susquehanna International Group, LLP | 159,068 | $1.33M | 0.00% | +23,565+17.4% | Added |
| TD Asset Management Inc | 150,662 | $1.26M | 0.00% | 00.0% | Unchanged |
| Northern Trust Corp | 144,933 | $1.21M | 0.00% | +144,933 | New |
| Ikarian Capital, LLC | 144,406 | $1.20M | 0.28% | −15,594−9.7% | Reduced |
| Wells Fargo & Company | 79,934 | $666.0K | 0.00% | +28,115+54.3% | Added |
| Morgan Stanley | 79,408 | $662.0K | 0.00% | +15,781+24.8% | Added |
| Cubist Systematic Strategies, LLC | 67,300 | $561.0K | 0.01% | +67,300 | New |
| Westchester Capital Management, LLC | 64,964 | $542.0K | 0.02% | −49,680−43.3% | Reduced |
| Asset Management Corp | 59,444 | $496.0K | 0.31% | +59,444 | New |
| Stifel Financial Corp | 54,292 | $453.0K | 0.00% | +54,292 | New |
| Royal Bank of Canada | 53,000 | $442.0K | 0.00% | +52,200+6,525.0% | Added |
| Private Advisor Group, LLC | 40,520 | $338.0K | 0.00% | +24,145+147.5% | Added |
| Kepos Capital LP | 38,500 | $321.0K | 0.02% | +38,500 | New |
| Simplex Trading, LLC | 25,880 | $312.0K | 0.01% | −1,410−5.2% | Reduced |
| Red Wave Investments LLC | 37,000 | $309.0K | 0.11% | +37,000 | New |
| Bank of New York Mellon Corp | 32,200 | $269.0K | 0.00% | +32,200 | New |
| Charles Schwab Investment Management Inc | 32,018 | $268.0K | 0.00% | +32,018 | New |
| Raymond James Financial Services Advisors, Inc. | 30,444 | $254.0K | 0.00% | −100−0.3% | Reduced |
| Guidance Point Advisors, LLC | 25,742 | $214.0K | 0.08% | 00.0% | Unchanged |
| Jane Street Group, LLC | 24,831 | $207.0K | 0.00% | −18,773−43.1% | Reduced |
| Cambridge Investment Research Advisors, Inc. | 22,707 | $189.0K | 0.00% | +22,707 | New |
| UBS Group AG | 21,225 | $177.0K | 0.00% | +9,069+74.6% | Added |
| Virtu Financial LLC | 16,935 | $141.0K | 0.01% | +16,935 | New |
| Capstone Investment Advisors, LLC | 16,710 | $139.0K | 0.00% | +16,710 | New |
| Wealth Management Associates, Inc. | 16,025 | $133.6K | 0.08% | +4,875+43.7% | Added |
| Bank of America Corp | 15,048 | $126.0K | 0.00% | +13,938+1,255.7% | Added |
| National Asset Management, Inc. | 15,000 | $126.0K | 0.00% | +15,000 | New |
| Wolverine Trading, LLC | 14,397 | $121.0K | 0.00% | +2,242+18.4% | Added |
| Ionic Capital Management LLC | 14,271 | $119.0K | 0.02% | −329−2.3% | Reduced |
| Flagship Private Wealth, LLC | 14,158 | $118.0K | 0.09% | +3,295+30.3% | Added |
| Procyon Private Wealth Partners, LLC | 13,711 | $114.0K | 0.03% | +13,711 | New |
| Boothbay Fund Management, LLC | 13,526 | $113.0K | 0.00% | −15,594−53.6% | Reduced |
| Citigroup Inc | 8,133 | $68.0K | 0.00% | +8,133 | New |
| Penserra Capital Management LLC | 5,042 | $42.0K | 0.00% | +5,042 | New |
| Cutler Group LP | 3,891 | $32.0K | 0.00% | −6,000−60.7% | Reduced |
| Brewin Dolphin Ltd | 3,500 | $29.2K | 0.00% | 00.0% | Unchanged |
| American Portfolios Advisors | 3,500 | $29.2K | 0.00% | +3,500 | New |
| FNY Investment Advisers, LLC | 3,492 | $29.0K | 0.01% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 3,120 | $26.0K | 0.00% | +1,163+59.4% | Added |
| Edge Wealth Management LLC | 2,499 | $21.0K | 0.00% | 00.0% | Unchanged |
| Reilly Financial Advisors, LLC | 2,110 | $18.0K | 0.00% | 00.0% | Unchanged |
| Thomas J. Herzfeld Advisors, Inc. | 965 | $8.00K | 0.00% | 00.0% | Unchanged |
| Wolff Wiese Magana LLC | 800 | $7.00K | 0.00% | 00.0% | Unchanged |
| Total Clarity Wealth Management, Inc. | 750 | $6.00K | 0.00% | +750 | New |
| Fifth Third Bancorp | 300 | $3.00K | 0.00% | 00.0% | Unchanged |
| Concord Wealth Partners | 300 | $3.00K | 0.00% | +300 | New |
| State of Wyoming | 332 | $3.00K | 0.00% | +332 | New |
| Eagle Bay Advisors LLC | 277 | $2.00K | 0.00% | +277 | New |
| IFP Advisors, Inc | 100 | $1.00K | 0.00% | 00.0% | Unchanged |
| Quantbot Technologies LP | 21 | $0 | 0.00% | −1,179−98.3% | Reduced |
| Tower Research Capital LLC (TRC) | 28 | $0 | 0.00% | −592−95.5% | Reduced |
| Alyeska Investment Group, L.P. | 0 | $0 | 0.00% | −3,125,374−100.0% | Sold out |
| Redmile Group, LLC | 0 | $0 | 0.00% | −1,700,000−100.0% | Sold out |
| Monashee Investment Management LLC | 0 | $0 | 0.00% | −1,250,000−100.0% | Sold out |
| CVI Holdings, LLC | 0 | $0 | 0.00% | −1,200,000−100.0% | Sold out |
| Citadel Advisors LLC | 0 | $0 | 0.00% | −867,703−100.0% | Sold out |
| TOMS Capital Investment Management LP | 0 | $0 | 0.00% | −500,000−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −373,868−100.0% | Sold out |
| Prosight Management, LP | 0 | $0 | 0.00% | −227,391−100.0% | Sold out |
| Sculptor Capital LP | 0 | $0 | 0.00% | −213,000−100.0% | Sold out |
| Affinity Asset Advisors, LLC | 0 | $0 | 0.00% | −75,000−100.0% | Sold out |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −61,655−100.0% | Sold out |
| Castle Creek Arbitrage, LLC | 0 | $0 | 0.00% | −55,668−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −27,500−100.0% | Sold out |
| Raymond James & Associates | 0 | $0 | 0.00% | −19,494−100.0% | Sold out |
| New York Life Investments Alternatives | 0 | $0 | 0.00% | −17,252−100.0% | Sold out |
| Bluefin Capital Management, LLC | 0 | $0 | 0.00% | −15,000−100.0% | Sold out |
| Strategic Wealth Advisors Group, LLC | 0 | $0 | 0.00% | −10,660−100.0% | Sold out |
| Advisory Services Network, LLC | 0 | $0 | 0.00% | −9,333−100.0% | Sold out |
| Belvedere Trading LLC | 0 | $0 | 0.00% | −4,406−100.0% | Sold out |
| JPMorgan Chase & Co | 0 | $0 | 0.00% | −89−100.0% | Sold out |
| City Holding Co | 0 | $0 | 0.00% | −100−100.0% | Sold out |
| Harbour Investments, Inc. | 0 | $0 | 0.00% | −100−100.0% | Sold out |
| Steward Partners Investment Advisory, LLC | 0 | $0 | 0.00% | −100−100.0% | Sold out |
| PEAK6 Investments LLC | 0 | $0 | 0.00% | −4−100.0% | Sold out |