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 2024
Institutional positions in Quantum-Si Inc as of Dec 31, 2024. 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
- 121
- +15 vs. Q3 2024
- Shares held
- 53.7M
- +1.63M (+3.1%) vs. Q3 2024
- Total value
- $144.8M
- +$99.0M (+215.7%) vs. Q3 2024
- New holders
- 35
- 42 more added
- Sold out
- 20
- 22 more reduced
1 institution that held it in Q3 2024 haven't filed for Q4 2024 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2024
Shares, value and share of portfolio for each institution holding Quantum-Si Inc; share changes are against Q3 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Bank of New York Mellon Corp | 269,807 | $728.5K | 0.00% | +47,400+21.3% | Added |
| Bridgeway Capital Management, LLC | 296,100 | $799.5K | 0.02% | −110,600−27.2% | Reduced |
| Knollwood Investment Advisory, LLC | 300,000 | $810.0K | 0.08% | 00.0% | Unchanged |
| Simplex Trading, LLC | 306,769 | $828.0K | 0.02% | +280,270+1,057.7% | Added |
| Charles Schwab Investment Management Inc | 308,021 | $831.7K | 0.00% | +75,661+32.6% | Added |
| Nuveen Asset Management, LLC | 319,100 | $861.6K | 0.00% | −245,980−43.5% | Reduced |
| Gsa Capital Partners LLP | 374,278 | $1.01M | 0.07% | +261,961+233.2% | Added |
| Renaissance Technologies LLC | 544,956 | $1.47M | 0.00% | +503,400+1,211.4% | Added |
| UBS Group AG | 592,112 | $1.60M | 0.00% | +542,946+1,104.3% | Added |
| Fosun International Ltd | 743,935 | $2.01M | 0.63% | 00.0% | Unchanged |
| Northern Trust Corp | 841,146 | $2.27M | 0.00% | +40,026+5.0% | Added |
| Goldman Sachs Group Inc | 1,002,130 | $2.71M | 0.00% | +759,992+313.9% | Added |
| Susquehanna International Group, LLP | 1,002,873 | $2.71M | 0.00% | +958,844+2,177.8% | Added |
| Geode Capital Management, LLC | 2,368,376 | $6.40M | 0.00% | +51,455+2.2% | Added |
| State Street Corp | 2,405,019 | $6.49M | 0.00% | +135,981+6.0% | Added |
| Morgan Stanley | 3,480,468 | $9.40M | 0.00% | +3,174,221+1,036.5% | Added |
| Vanguard Group Inc | 5,491,753 | $14.8M | 0.00% | +454,495+9.0% | Added |
| Nikko Asset Management Americas, Inc. | 5,965,208 | $16.0M | 0.17% | −1,562,704−20.8% | Reduced |
| Sumitomo Mitsui Trust Holdings, Inc. | 5,965,208 | $16.1M | 0.01% | −1,582,704−21.0% | Reduced |
| BlackRock, Inc. | 8,437,647 | $22.8M | 0.00% | +1,537,520+22.3% | Added |
| ARK Investment Management LLCSuperinvestorARK Invest | 8,848,650 | $23.9M | 0.20% | −2,993,959−25.3% | Reduced |
| Jacobs Levy Equity Management, Inc | 0 | $0 | 0.00% | −939,419−100.0% | Sold out |
| General American Investors Co Inc | 0 | $0 | 0.00% | −294,350−100.0% | Sold out |
| Millennium Management LLC | 0 | $0 | 0.00% | −150,865−100.0% | Sold out |
| Ameriprise Financial Inc | 0 | $0 | 0.00% | −123,757−100.0% | Sold out |
| Citadel Advisors LLC | 0 | $0 | 0.00% | −79,753−100.0% | Sold out |
| Public Employees Retirement System of Ohio | 0 | $0 | 0.00% | −60,526−100.0% | Sold out |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −27,500−100.0% | Sold out |
| Neumann Advisory Hong Kong Ltd | 0 | $0 | 0.00% | −22,640−100.0% | Sold out |
| Verition Fund Management LLC | 0 | $0 | 0.00% | −22,125−100.0% | Sold out |
| STRS Ohio | 0 | $0 | 0.00% | −20,000−100.0% | Sold out |
| Stonebrook Private Inc. | 0 | $0 | 0.00% | −18,105−100.0% | Sold out |
| D. E. Shaw & Co., Inc. | 0 | $0 | 0.00% | −14,100−100.0% | Sold out |
| Stratos Wealth Advisors, LLC | 0 | $0 | 0.00% | −11,810−100.0% | Sold out |
| Jefferies Financial Group Inc. | 0 | $0 | 0.00% | −10,941−100.0% | Sold out |
| Nordwand Advisors, LLC | 0 | $0 | 0.00% | −2,000−100.0% | Sold out |
| Fortitude Family Office, LLC | 0 | $0 | 0.00% | −1,462−100.0% | Sold out |
| Northwestern Mutual Wealth Management Co | 0 | $0 | 0.00% | −728−100.0% | Sold out |
| Capital Performance Advisors LLP | 0 | $0 | 0.00% | −355−100.0% | Sold out |
| Allspring Global Investments Holdings, LLC | 0 | $0 | 0.00% | −292−100.0% | Sold out |
| Founders Capital Management | 0 | $0 | 0.00% | −100−100.0% | Sold out |
| Planning Capital Management Corp | – | – | – | – | Not filed |