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 2024
Institutional positions in Quantum-Si Inc as of Sep 30, 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
- 107
- +9 vs. Q2 2024
- Shares held
- 52.0M
- +5.47M (+11.8%) vs. Q2 2024
- Total value
- $45.9M
- −$2.84M (−5.8%) vs. Q2 2024
- New holders
- 20
- 24 more added
- Sold out
- 11
- 33 more reduced
1 institution that held it in Q2 2024 haven't filed for Q3 2024 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2024
Shares, value and share of portfolio for each institution holding Quantum-Si Inc; share changes are against Q2 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| State Street Corp | 2,269,038 | $2.00M | 0.00% | −102,313−4.3% | Reduced |
| Geode Capital Management, LLC | 2,316,921 | $2.04M | 0.00% | +145,091+6.7% | Added |
| Vanguard Group Inc | 5,037,258 | $4.44M | 0.00% | +88,896+1.8% | Added |
| BlackRock, Inc. | 6,900,127 | $6.09M | 0.00% | +6,900,127 | New |
| Nikko Asset Management Americas, Inc. | 7,527,912 | $6.62M | 0.08% | −335,249−4.3% | Reduced |
| Sumitomo Mitsui Trust Holdings, Inc. | 7,547,912 | $6.66M | 0.00% | −315,249−4.0% | Reduced |
| ARK Investment Management LLCSuperinvestorARK Invest | 11,842,609 | $10.4M | 0.10% | −567,320−4.6% | Reduced |
| Virtu Financial LLC | 0 | $0 | 0.00% | −101,301−100.0% | Sold out |
| Two Sigma Investments, LP | 0 | $0 | 0.00% | −89,261−100.0% | Sold out |
| Raymond James Financial Services Advisors, Inc. | 0 | $0 | 0.00% | −30,930−100.0% | Sold out |
| Arlington Trust Co LLC | 0 | $0 | 0.00% | −27,500−100.0% | Sold out |
| Dynamic Technology Lab Private Ltd | 0 | $0 | 0.00% | −26,060−100.0% | Sold out |
| Bayesian Capital Management, LP | 0 | $0 | 0.00% | −19,096−100.0% | Sold out |
| Principal Financial Group Inc | 0 | $0 | 0.00% | −16,462−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −11,698−100.0% | Sold out |
| Leonteq Securities AG | 0 | $0 | 0.00% | −11,000−100.0% | Sold out |
| TownSquare Capital, LLC | 0 | $0 | 0.00% | −10,970−100.0% | Sold out |
| Rothschild Investment LLC | 0 | $0 | 0.00% | −75−100.0% | Sold out |
| BlackRock Inc. | – | – | – | – | Not filed |