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 |
|---|---|---|---|---|---|
| Capstone Investment Advisors, LLC | 0 | $0 | 0.00% | −16,710−100.0% | Sold out |
| National Asset Management, Inc. | 0 | $0 | 0.00% | −15,000−100.0% | Sold out |
| Ionic Capital Management LLC | 0 | $0 | 0.00% | −14,271−100.0% | Sold out |
| Brewin Dolphin Ltd | 0 | $0 | 0.00% | −3,500−100.0% | Sold out |
| FNY Investment Advisers, LLC | 0 | $0 | 0.00% | −3,492−100.0% | Sold out |
| Thomas J. Herzfeld Advisors, Inc. | 0 | $0 | 0.00% | −965−100.0% | Sold out |
| Fifth Third Bancorp | 0 | $0 | 0.00% | −300−100.0% | Sold out |
| State of Wyoming | 0 | $0 | 0.00% | −332−100.0% | Sold out |
| IFP Advisors, Inc | 0 | $0 | 0.00% | −100−100.0% | Sold out |