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, Q2 2025
Institutional positions in Quantum-Si Inc as of Jun 30, 2025. 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
- 135
- −1 vs. Q1 2025
- Shares held
- 64.4M
- +6.66M (+11.5%) vs. Q1 2025
- Total value
- $126.2M
- +$56.9M (+82.3%) vs. Q1 2025
- New holders
- 15
- 56 more added
- Sold out
- 16
- 35 more reduced
1 institution that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2025: 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, Q2 2025
Shares, value and share of portfolio for each institution holding Quantum-Si Inc; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Capital Advisors, Ltd. LLC | 58 | $0 | 0.00% | −2−3.3% | Reduced |
| Federation des caisses Desjardins du Quebec | 50 | $98 | 0.00% | 00.0% | Unchanged |
| FSA Wealth Management LLC | 100 | $196 | 0.00% | 00.0% | Unchanged |
| Medallion Wealth Advisors, LLC | 242 | $460 | 0.00% | −19−7.3% | Reduced |
| Bangor Savings Bank | 400 | $784 | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 548 | $1.07K | 0.00% | +59+12.1% | Added |
| National Bank of Canada | 600 | $1.18K | 0.00% | −10,500−94.6% | Reduced |
| TD Waterhouse Canada Inc. | 800 | $1.52K | 0.00% | 00.0% | Unchanged |
| EverSource Wealth Advisors, LLC | 828 | $1.62K | 0.00% | +271+48.7% | Added |
| Allworth Financial LP | 836 | $1.64K | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 1,258 | $2.44K | 0.00% | +138+12.3% | Added |
| Nisa Investment Advisors, LLC | 1,324 | $2.60K | 0.00% | +208+18.6% | Added |
| Archer Investment Corp | 2,000 | $3.92K | 0.00% | 00.0% | Unchanged |
| Talon Private Wealth, LLC | 2,000 | $3.92K | 0.00% | +2,000 | New |
| Sterling Capital Management LLC | 3,395 | $6.65K | 0.00% | +1,321+63.7% | Added |
| FNY Investment Advisers, LLC | 4,000 | $7.00K | 0.00% | 00.0% | Unchanged |
| Pinney & Scofield, Inc. | 3,680 | $7.21K | 0.00% | 00.0% | Unchanged |
| Raymond James Financial Inc | 3,700 | $7.25K | 0.00% | −89,175−96.0% | Reduced |
| N.E.W. Advisory Services LLC | 3,854 | $7.55K | 0.00% | 00.0% | Unchanged |
| Amalgamated Bank | 4,142 | $8.00K | 0.00% | 00.0% | Unchanged |
| MTM Investment Management, LLC | 4,125 | $8.09K | 0.00% | +4,125 | New |
| Principal Securities, Inc. | 6,641 | $13.0K | 0.00% | +1,729+35.2% | Added |
| Belvedere Trading LLC | 7,222 | $14.2K | 0.00% | +7,222 | New |
| CWM, LLC | 8,911 | $17.0K | 0.00% | +5,334+149.1% | Added |
| California State Teachers Retirement System | 8,801 | $17.3K | 0.00% | +1,544+21.3% | Added |
| Headlands Technologies LLC | 9,322 | $18.3K | 0.00% | +8,997+2,768.3% | Added |
| Capital Investment Advisory Services, LLC | 10,000 | $19.6K | 0.00% | 00.0% | Unchanged |
| TriaGen Wealth Management LLC | 10,000 | $19.6K | 0.01% | 00.0% | Unchanged |
| Glen Eagle Advisors, LLC | 10,000 | $19.6K | 0.00% | 00.0% | Unchanged |
| Ground Swell Capital, LLC | 10,100 | $19.8K | 0.03% | +10,100 | New |
| Kestra Advisory Services, LLC | 10,132 | $19.9K | 0.00% | −4,958−32.9% | Reduced |
| GWM Advisors LLC | 10,250 | $20.1K | 0.00% | 00.0% | Unchanged |
| Callan Family Office, LLC | 10,379 | $20.3K | 0.00% | +10,379 | New |
| Xponance, Inc. | 11,051 | $21.7K | 0.00% | +11,051 | New |
| American Century Companies Inc | 12,036 | $23.6K | 0.00% | +12,036 | New |
| State Board of Administration of Florida Retirement System | 12,300 | $24.1K | 0.00% | 00.0% | Unchanged |
| Prudential Financial Inc | 12,850 | $25.2K | 0.00% | +12,850 | New |
| Legal & General Group Plc | 12,860 | $25.2K | 0.00% | +3,566+38.4% | Added |
| JTC Employer Solutions Trusteee Ltd | 13,340 | $26.0K | 0.00% | +13,340 | New |
| Neuberger Berman Group LLC | 13,430 | $26.3K | 0.00% | −2,489−15.6% | Reduced |
| Procyon Private Wealth Partners, LLC | 13,671 | $26.8K | 0.00% | 00.0% | Unchanged |
| HSBC Holdings PLC | 13,717 | $27.2K | 0.00% | −270−1.9% | Reduced |
| CIBC World Markets Inc. | 14,011 | $27.5K | 0.00% | −6,000−30.0% | Reduced |
| Flagship Private Wealth, LLC | 14,158 | $27.8K | 0.01% | 00.0% | Unchanged |
| Ameritas Investment Partners, Inc. | 14,401 | $28.2K | 0.00% | +4,495+45.4% | Added |
| Mark Sheptoff Financial Planning, LLC | 14,500 | $28.4K | 0.02% | 00.0% | Unchanged |
| Cerity Partners LLC | 14,881 | $29.2K | 0.00% | +14,881 | New |
| Tower Research Capital LLC (TRC) | 14,907 | $29.2K | 0.00% | −6,119−29.1% | Reduced |
| BNP Paribas Arbitrage, SA | 15,133 | $29.7K | 0.00% | +6,516+75.6% | Added |
| Victory Capital Management Inc | 16,217 | $31.8K | 0.00% | −376−2.3% | Reduced |
| Wolverine Asset Management LLC | 16,501 | $32.3K | 0.00% | +9,626+140.0% | Added |
| CIBC World Markets Corp | 17,379 | $34.1K | 0.00% | −9,288−34.8% | Reduced |
| Stratos Wealth Advisors, LLC | 17,860 | $35.0K | 0.00% | −450−2.5% | Reduced |
| FMR LLC | 18,520 | $36.3K | 0.00% | −61,103−76.7% | Reduced |
| Cetera Investment Advisers | 18,771 | $36.8K | 0.00% | −330−1.7% | Reduced |
| DLK Investment Management, LLC | 19,750 | $38.7K | 0.01% | +750+3.9% | Added |
| Jefferies Financial Group Inc. | 20,000 | $39.2K | 0.00% | −63,031−75.9% | Reduced |
| Kingsview Wealth Management, LLC | 20,012 | $39.2K | 0.00% | +10,000+99.9% | Added |
| Atom Investors LP | 20,803 | $40.8K | 0.00% | −9,369−31.1% | Reduced |
| LPL Financial LLC | 23,290 | $45.6K | 0.00% | +3,178+15.8% | Added |
| JustInvest LLC | 24,091 | $47.2K | 0.00% | +614+2.6% | Added |
| HBW Advisory Services LLC | 24,253 | $47.5K | 0.01% | +100.0% | Added |
| Leonteq Securities AG | 25,000 | $49.0K | 0.00% | 00.0% | Unchanged |
| Hollencrest Capital Management | 25,000 | $49.0K | 0.00% | +5,000+25.0% | Added |
| Mercer Global Advisors Inc | 25,260 | $49.5K | 0.00% | −1,853−6.8% | Reduced |
| Commonwealth Equity Services, LLC | 25,515 | $50.0K | 0.00% | −15,353−37.6% | Reduced |
| New York State Common Retirement Fund | 26,084 | $51.1K | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 26,141 | $51.2K | 0.00% | +7,171+37.8% | Added |
| Wealth Management Associates, Inc. | 26,950 | $52.8K | 0.02% | 00.0% | Unchanged |
| ProShare Advisors LLC | 28,924 | $56.7K | 0.00% | +2,908+11.2% | Added |
| Russell Investments Group, Ltd. | 29,901 | $58.6K | 0.00% | −8,356−21.8% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 31,134 | $61.0K | 0.00% | 00.0% | Unchanged |
| SG Americas Securities, LLC | 32,181 | $63.0K | 0.00% | −7,898−19.7% | Reduced |
| SEI Investments Co | 33,103 | $64.9K | 0.00% | 00.0% | Unchanged |
| Captrust Financial Advisors | 34,310 | $67.2K | 0.00% | −273−0.8% | Reduced |
| Sanctuary Advisors, LLC | 36,337 | $71.2K | 0.00% | −445−1.2% | Reduced |
| Red Wave Investments LLC | 37,000 | $72.5K | 0.02% | 00.0% | Unchanged |
| Two Sigma Securities, LLC | 37,861 | $74.2K | 0.01% | −14,359−27.5% | Reduced |
| Cambridge Investment Research Advisors, Inc. | 38,867 | $76.0K | 0.00% | 00.0% | Unchanged |
| Voya Investment Management LLC | 38,863 | $76.2K | 0.00% | +9,311+31.5% | Added |
| Wolverine Trading, LLC | 40,425 | $78.8K | 0.00% | −33−0.1% | Reduced |
| XTX Topco Ltd | 46,474 | $91.1K | 0.00% | −322,494−87.4% | Reduced |
| Jones Financial Companies LLLP | 46,900 | $91.5K | 0.00% | +43,900+1,463.3% | Added |
| Manufacturers Life Insurance Company, The | 49,082 | $96.2K | 0.00% | +10,564+27.4% | Added |
| Citigroup Inc | 49,107 | $96.2K | 0.00% | −35,352−41.9% | Reduced |
| Mariner, LLC | 50,594 | $99.2K | 0.00% | +2,589+5.4% | Added |
| Axq Capital, LP | 57,000 | $111.7K | 0.04% | +57,000 | New |
| JPMorgan Chase & Co | 66,656 | $130.6K | 0.00% | +9,005+15.6% | Added |
| Ewa, LLC | 68,200 | $133.7K | 0.04% | −10,488−13.3% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 77,215 | $151.3K | 0.00% | +6,663+9.4% | Added |
| MetLife Investment Management | 77,316 | $151.5K | 0.00% | +1,301+1.7% | Added |
| Sculptor Capital LP | 78,200 | $153.3K | 0.00% | 00.0% | Unchanged |
| AlphaCore Capital LLC | 83,950 | $164.5K | 0.01% | +83,950 | New |
| Intech Investment Management LLC | 88,497 | $173.5K | 0.00% | +27,132+44.2% | Added |
| Renaissance Technologies LLC | 89,200 | $174.8K | 0.00% | −782,556−89.8% | Reduced |
| Deutsche Bank AG | 98,532 | $193.1K | 0.00% | +31,010+45.9% | Added |
| Wells Fargo & Company | 101,716 | $199.4K | 0.00% | +18,383+22.1% | Added |
| Simplex Trading, LLC | 105,534 | $206.0K | 0.01% | +62,625+145.9% | Added |
| Davy Global Fund Management Ltd | 116,828 | $229.0K | 0.02% | +46,884+67.0% | Added |
| Price T Rowe Associates Inc | 120,506 | $237.0K | 0.00% | +12,332+11.4% | Added |