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 |
|---|---|---|---|---|---|
| BlackRock, Inc. | 10,848,142 | $21.3M | 0.00% | +1,407,899+14.9% | Added |
| Vanguard Group Inc | 8,669,661 | $17.0M | 0.00% | +1,776,799+25.8% | Added |
| ARK Investment Management LLCSuperinvestorARK Invest | 7,960,736 | $15.6M | 0.11% | −752,765−8.6% | Reduced |
| Sumitomo Mitsui Trust Holdings, Inc. | 5,621,303 | $11.0M | 0.01% | −190,127−3.3% | Reduced |
| Nikko Asset Management Americas, Inc. | 5,621,303 | $11.0M | 0.11% | −190,127−3.3% | Reduced |
| Millennium Management LLC | 3,779,259 | $7.41M | 0.01% | −155,026−3.9% | Reduced |
| Geode Capital Management, LLC | 3,447,738 | $6.76M | 0.00% | +452,850+15.1% | Added |
| State Street Corp | 2,756,437 | $5.40M | 0.00% | +302,331+12.3% | Added |
| Northern Trust Corp | 2,289,456 | $4.49M | 0.00% | +1,267,338+124.0% | Added |
| Nuveen, LLC | 1,126,084 | $2.21M | 0.00% | +806,984+252.9% | Added |
| Susquehanna International Group, LLP | 986,084 | $1.93M | 0.00% | +189,154+23.7% | Added |
| Goldman Sachs Group Inc | 894,100 | $1.75M | 0.00% | +452,786+102.6% | Added |
| UBS Group AG | 789,570 | $1.55M | 0.00% | +339,888+75.6% | Added |
| Fosun International Ltd | 743,935 | $1.46M | 0.46% | 00.0% | Unchanged |
| Two Sigma Investments, LP | 564,442 | $1.11M | 0.00% | −252,533−30.9% | Reduced |
| Citadel Advisors LLC | 558,307 | $1.09M | 0.00% | +419,809+303.1% | Added |
| Bank of America Corp | 465,999 | $913.4K | 0.00% | +377,504+426.6% | Added |
| Royal Bank of Canada | 460,289 | $902.0K | 0.00% | +446,860+3,327.6% | Added |
| Charles Schwab Investment Management Inc | 431,447 | $845.6K | 0.00% | +64,003+17.4% | Added |
| Bank of New York Mellon Corp | 352,732 | $691.4K | 0.00% | +57,826+19.6% | Added |
| Knollwood Investment Advisory, LLC | 300,000 | $588.0K | 0.06% | 00.0% | Unchanged |
| Morgan Stanley | 289,913 | $568.2K | 0.00% | +2,425+0.8% | Added |
| Jane Street Group, LLC | 284,753 | $558.1K | 0.00% | +284,753 | New |
| Gsa Capital Partners LLP | 284,363 | $557.0K | 0.04% | +38,171+15.5% | Added |
| Alliancebernstein L.P. | 272,180 | $533.5K | 0.00% | +162,000+147.0% | Added |
| Barclays PLC | 239,001 | $468.4K | 0.00% | +118,113+97.7% | Added |
| Green Alpha Advisors, LLC | 228,348 | $447.6K | 0.43% | −15,719−6.4% | Reduced |
| Ameriprise Financial Inc | 223,100 | $437.3K | 0.00% | +223,100 | New |
| Rhumbline Advisers | 203,967 | $399.8K | 0.00% | +53,994+36.0% | Added |
| Pathstone Holdings, LLC | 198,798 | $389.6K | 0.00% | −15,511−7.2% | Reduced |
| Bridgeway Capital Management, LLC | 196,100 | $384.4K | 0.01% | 00.0% | Unchanged |
| Invesco Ltd. | 195,450 | $383.1K | 0.00% | +91,793+88.6% | Added |
| Group One Trading, L.P. | 134,632 | $263.9K | 0.01% | +134,632 | New |
| Shay Capital LLC | 129,631 | $254.1K | 0.06% | +1,131+0.9% | Added |
| AQR Capital Management LLC | 121,703 | $238.5K | 0.00% | +25,661+26.7% | Added |
| Price T Rowe Associates Inc | 120,506 | $237.0K | 0.00% | +12,332+11.4% | Added |
| Davy Global Fund Management Ltd | 116,828 | $229.0K | 0.02% | +46,884+67.0% | Added |
| Simplex Trading, LLC | 105,534 | $206.0K | 0.01% | +62,625+145.9% | Added |
| Wells Fargo & Company | 101,716 | $199.4K | 0.00% | +18,383+22.1% | Added |
| Deutsche Bank AG | 98,532 | $193.1K | 0.00% | +31,010+45.9% | Added |
| Renaissance Technologies LLC | 89,200 | $174.8K | 0.00% | −782,556−89.8% | Reduced |
| Intech Investment Management LLC | 88,497 | $173.5K | 0.00% | +27,132+44.2% | Added |
| AlphaCore Capital LLC | 83,950 | $164.5K | 0.01% | +83,950 | New |
| Sculptor Capital LP | 78,200 | $153.3K | 0.00% | 00.0% | Unchanged |
| MetLife Investment Management | 77,316 | $151.5K | 0.00% | +1,301+1.7% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 77,215 | $151.3K | 0.00% | +6,663+9.4% | Added |
| Ewa, LLC | 68,200 | $133.7K | 0.04% | −10,488−13.3% | Reduced |
| JPMorgan Chase & Co | 66,656 | $130.6K | 0.00% | +9,005+15.6% | Added |
| Axq Capital, LP | 57,000 | $111.7K | 0.04% | +57,000 | New |
| Mariner, LLC | 50,594 | $99.2K | 0.00% | +2,589+5.4% | Added |
| Citigroup Inc | 49,107 | $96.2K | 0.00% | −35,352−41.9% | Reduced |
| Manufacturers Life Insurance Company, The | 49,082 | $96.2K | 0.00% | +10,564+27.4% | Added |
| Jones Financial Companies LLLP | 46,900 | $91.5K | 0.00% | +43,900+1,463.3% | Added |
| XTX Topco Ltd | 46,474 | $91.1K | 0.00% | −322,494−87.4% | Reduced |
| Wolverine Trading, LLC | 40,425 | $78.8K | 0.00% | −33−0.1% | Reduced |
| Voya Investment Management LLC | 38,863 | $76.2K | 0.00% | +9,311+31.5% | Added |
| Cambridge Investment Research Advisors, Inc. | 38,867 | $76.0K | 0.00% | 00.0% | Unchanged |
| Two Sigma Securities, LLC | 37,861 | $74.2K | 0.01% | −14,359−27.5% | Reduced |
| Red Wave Investments LLC | 37,000 | $72.5K | 0.02% | 00.0% | Unchanged |
| Sanctuary Advisors, LLC | 36,337 | $71.2K | 0.00% | −445−1.2% | Reduced |
| Captrust Financial Advisors | 34,310 | $67.2K | 0.00% | −273−0.8% | Reduced |
| SEI Investments Co | 33,103 | $64.9K | 0.00% | 00.0% | Unchanged |
| SG Americas Securities, LLC | 32,181 | $63.0K | 0.00% | −7,898−19.7% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 31,134 | $61.0K | 0.00% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 29,901 | $58.6K | 0.00% | −8,356−21.8% | Reduced |
| ProShare Advisors LLC | 28,924 | $56.7K | 0.00% | +2,908+11.2% | Added |
| Wealth Management Associates, Inc. | 26,950 | $52.8K | 0.02% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 26,141 | $51.2K | 0.00% | +7,171+37.8% | Added |
| New York State Common Retirement Fund | 26,084 | $51.1K | 0.00% | 00.0% | Unchanged |
| Commonwealth Equity Services, LLC | 25,515 | $50.0K | 0.00% | −15,353−37.6% | Reduced |
| Mercer Global Advisors Inc | 25,260 | $49.5K | 0.00% | −1,853−6.8% | Reduced |
| 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 |
| HBW Advisory Services LLC | 24,253 | $47.5K | 0.01% | +100.0% | Added |
| JustInvest LLC | 24,091 | $47.2K | 0.00% | +614+2.6% | Added |
| LPL Financial LLC | 23,290 | $45.6K | 0.00% | +3,178+15.8% | Added |
| Atom Investors LP | 20,803 | $40.8K | 0.00% | −9,369−31.1% | Reduced |
| Kingsview Wealth Management, LLC | 20,012 | $39.2K | 0.00% | +10,000+99.9% | Added |
| Jefferies Financial Group Inc. | 20,000 | $39.2K | 0.00% | −63,031−75.9% | Reduced |
| DLK Investment Management, LLC | 19,750 | $38.7K | 0.01% | +750+3.9% | Added |
| Cetera Investment Advisers | 18,771 | $36.8K | 0.00% | −330−1.7% | Reduced |
| FMR LLC | 18,520 | $36.3K | 0.00% | −61,103−76.7% | Reduced |
| Stratos Wealth Advisors, LLC | 17,860 | $35.0K | 0.00% | −450−2.5% | Reduced |
| CIBC World Markets Corp | 17,379 | $34.1K | 0.00% | −9,288−34.8% | Reduced |
| Wolverine Asset Management LLC | 16,501 | $32.3K | 0.00% | +9,626+140.0% | Added |
| Victory Capital Management Inc | 16,217 | $31.8K | 0.00% | −376−2.3% | Reduced |
| BNP Paribas Arbitrage, SA | 15,133 | $29.7K | 0.00% | +6,516+75.6% | Added |
| Tower Research Capital LLC (TRC) | 14,907 | $29.2K | 0.00% | −6,119−29.1% | Reduced |
| Cerity Partners LLC | 14,881 | $29.2K | 0.00% | +14,881 | New |
| Mark Sheptoff Financial Planning, LLC | 14,500 | $28.4K | 0.02% | 00.0% | Unchanged |
| Ameritas Investment Partners, Inc. | 14,401 | $28.2K | 0.00% | +4,495+45.4% | Added |
| Flagship Private Wealth, LLC | 14,158 | $27.8K | 0.01% | 00.0% | Unchanged |
| CIBC World Markets Inc. | 14,011 | $27.5K | 0.00% | −6,000−30.0% | Reduced |
| HSBC Holdings PLC | 13,717 | $27.2K | 0.00% | −270−1.9% | Reduced |
| Procyon Private Wealth Partners, LLC | 13,671 | $26.8K | 0.00% | 00.0% | Unchanged |
| Neuberger Berman Group LLC | 13,430 | $26.3K | 0.00% | −2,489−15.6% | Reduced |
| JTC Employer Solutions Trusteee Ltd | 13,340 | $26.0K | 0.00% | +13,340 | New |
| Legal & General Group Plc | 12,860 | $25.2K | 0.00% | +3,566+38.4% | Added |
| Prudential Financial Inc | 12,850 | $25.2K | 0.00% | +12,850 | New |
| State Board of Administration of Florida Retirement System | 12,300 | $24.1K | 0.00% | 00.0% | Unchanged |