Quantum-SiQSI
13F holders, Q2 2026 (June 30)141holders −16
27new positions
41sold out
6famous investors
$0.89avg. 13F price*
At the end of Q2 2026, 141 institutions reported holding Quantum-Si Inc. (QSI) in their 13F filings, down 16 from Q1 2026. 27 opened new positions and 41 sold out. The largest holders were Vanguard Capital Management LLC ($6.7M), ARK Investment Management ($6.3M) and BlackRock, Inc. ($4.6M). 6 famous investors held it, including Cathie Wood (0.0% of ARK Investment Management's portfolio), Israel Englander (0.0% of Millennium Management's portfolio) and Cliff Asness (0.0% of AQR Capital Management's portfolio).
- Company
- Quantum-Si Inc.
- CUSIP
- 74765K105
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 27 | $5.5M |
| Exits | 41 | $1.4M |
All 13F filers, Q1 2026 → Q2 2026: 9,643,934 shares bought and 19,782,360 shares sold, net −10,138,426 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 141 holders
| Vanguard Capital Management LLC | 0.00% | Add +7.9% | 7,578,208 | $6.7M |
| ARK Investment Management | 0.04% | Add +4.2% | 7,167,738 | $6.3M |
| BlackRock, Inc. | 0.00% | Reduce -61.0% | 5,225,352 | $4.6M |
| Amova Asset Management Americas, Inc. | 0.04% | Reduce -11.5% | 3,885,230 | $3.5M |
| Sumitomo Mitsui Trust Group, Inc. | 0.00% | Reduce -11.5% | 3,885,230 | $3.4M |
| Millennium Management | 0.00% | New | 3,131,726 | $2.8M |
| UBS Group AG | 0.00% | Add +50.5% | 2,561,897 | $2.3M |
| AQR Capital Management | 0.00% | Reduce -1.8% | 2,348,665 | $2.1M |
| Geode Capital Management, LLC | 0.00% | Reduce -41.7% | 2,236,526 | $2.0M |
| Jane Street Group, LLC | 0.00% | New | 2,142,735 | $1.9M |
| Susquehanna International Group, LLP | 0.00% | Reduce -23.8% | 1,116,750 | $988K |
| Vanguard Fiduciary Trust Co. | 0.00% | Reduce -0.1% | 1,116,683 | $988K |
| State Street Corp. | 0.00% | Reduce -76.4% | 890,741 | $788K |
| Fosun International Ltd | 0.16% | No change | 743,935 | $658K |
| Renaissance Technologies | 0.00% | Add +369.8% | 553,871 | $490K |
| Vanguard Portfolio Management LLC | 0.00% | Reduce -67.3% | 497,098 | $440K |
| Goldman Sachs Group Inc. | 0.00% | Add +7.2% | 476,288 | $422K |
| Northern Trust Corp. | 0.00% | Reduce -64.3% | 450,531 | $399K |
| Invesco Ltd. | 0.00% | Add +9.2% | 443,929 | $393K |
| BNP Paribas Financial Markets | 0.00% | Add +938.3% | 398,598 | $353K |
| Ieq Capital, LLC | 0.00% | Reduce -1.9% | 350,816 | $310K |
| Aster Capital Management (DIFC) Ltd | 0.06% | New | 344,510 | $305K |
| Morgan Stanley | 0.00% | Add +148.9% | 323,482 | $286K |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd | 0.02% | Add +9.9% | 321,134 | $284K |
| Knollwood Investment Advisory, LLC | 0.02% | No change | 300,000 | $266K |
| IMC-Chicago, LLC | 0.00% | Add +29.4% | 285,758 | $253K |
| Bridgeway Capital Management, LLC | 0.00% | Reduce -21.1% | 206,100 | $182K |
| Barclays PLC | 0.00% | Add +425.6% | 205,690 | $182K |
| XTX Topco Ltd | 0.00% | Reduce -54.4% | 177,680 | $157K |
| Simplex Trading, LLC | 0.00% | Add +82.6% | 165,293 | $146K |
| Verdence Capital Advisors LLC | 0.01% | Reduce -22.3% | 158,305 | $140K |
| Mariner, LLC | 0.00% | Reduce -21.0% | 157,689 | $140K |
| Shay Capital LLC | 0.01% | No change | 150,922 | $134K |
| FMR LLC | 0.00% | Add +287.2% | 123,767 | $110K |
| Group One Trading LLC | 0.00% | Reduce -62.1% | 107,473 | $95K |
| Jones Financial Companies LLLP | 0.00% | Reduce -8.6% | 100,483 | $86K |
| HRT Financial LP | 0.00% | New | 93,647 | $82K |
| AlphaCore Capital LLC | 0.00% | Reduce -30.4% | 89,368 | $79K |
| Cerity Partners LLC | 0.00% | Add +5.8% | 85,347 | $76K |
| Vanguard Global Advisers, LLC | 0.00% | No change | 84,757 | $75K |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -81.5% | 84,612 | $75K |
| Y-Intercept (Hong Kong) Ltd | 0.00% | New | 79,089 | $70K |
| JTC Employer Solutions Trustee Ltd | 0.01% | Add +125.2% | 77,787 | $69K |
| Mercer Global Advisors Inc. | 0.00% | Add +40.0% | 77,277 | $68K |
| Rhumbline Advisers | 0.00% | Reduce -60.6% | 75,989 | $67K |
| WINTON GROUP Ltd | 0.00% | New | 75,800 | $67K |
| Captrust Financial Advisors | 0.00% | Add +5.9% | 73,128 | $65K |
| Hollencrest Capital Management | 0.00% | Add +62.1% | 65,011 | $58K |
| Gsa Capital Partners LLP | 0.00% | New | 60,011 | $53K |
| Bank of America Corp. | 0.00% | Reduce -63.2% | 59,585 | $53K |
| Creative Planning | 0.00% | Add +6.3% | 55,884 | $49K |
| Atom Investors LP | 0.00% | New | 51,554 | $46K |
| Wealth Enhancement Advisory Services, LLC | 0.00% | Reduce -29.1% | 63,435 | $45K |
| Green Alpha Advisors, LLC | 0.03% | Add +6.3% | 45,921 | $41K |
| Citadel Advisors | 0.00% | Add +185.2% | 44,335 | $39K |
| Sanctuary Advisors, LLC | 0.00% | Reduce -3.3% | 41,397 | $37K |
| Stratos Wealth Advisors, LLC | 0.00% | Add +166.3% | 40,036 | $35K |
| Point72 Asset Management | 0.00% | New | 39,133 | $35K |
| Brighton Jones LLC | 0.00% | Add +40.0% | 38,585 | $34K |
| Corient Private Wealth LP | 0.00% | New | 38,328 | $34K |
| Cambridge Investment Research Advisors, Inc. | 0.00% | Reduce -9.6% | 37,809 | $33K |
| Red Wave Investments LLC | 0.01% | No change | 37,000 | $33K |
| Arax Advisory Partners | 0.00% | Add +2597.2% | 36,790 | $33K |
| SBI Securities Co., Ltd. | 0.00% | Add +2.7% | 33,009 | $29K |
| China Universal Asset Management Co., Ltd. | 0.00% | Reduce -9.3% | 31,484 | $28K |
| Kovack Advisors, Inc. | 0.00% | Add +3.3% | 31,000 | $27K |
| IPG Investment Advisors LLC | 0.00% | New | 30,864 | $27K |
| Nuveen, LLC | 0.00% | Reduce -93.3% | 30,077 | $27K |
| Northern Lights Advisors, Inc. | 0.01% | No change | 29,989 | $27K |
| Commonwealth Equity Services, LLC | 0.00% | Reduce -9.0% | 27,100 | $24K |
| Wealth Management Associates, Inc. | 0.01% | Reduce -2.2% | 26,350 | $23K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -4.8% | 23,758 | $21K |
| Merit Financial Group, LLC | 0.00% | Reduce -35.0% | 23,616 | $21K |
| Pallas Capital Advisors LLC | 0.00% | Reduce -9.5% | 23,320 | $21K |
| DLK Investment Management, LLC | 0.01% | Add +13.4% | 19,000 | $20K |
| Leonteq Securities AG | 0.00% | Reduce -10.0% | 22,500 | $20K |
| HBW Advisory Services LLC | 0.00% | Reduce -1.8% | 22,292 | $20K |
| Neuberger Berman Group LLC | 0.00% | New | 21,766 | $19K |
| LPL Financial LLC | 0.00% | Reduce -6.6% | 20,985 | $19K |
| Vanguard Personalized Indexing Management, LLC | 0.00% | Reduce -15.2% | 20,350 | $18K |
| Capital Investment Advisory Services, LLC | 0.00% | No change | 20,000 | $18K |
| Victory Capital Management Inc. | 0.00% | Reduce -0.9% | 19,630 | $17K |
| Anchyra Partners LLC | 0.00% | New | 18,974 | $17K |
| Bank of New York Mellon Corp | 0.00% | Reduce -95.1% | 18,805 | $17K |
| Focus Partners Wealth | 0.00% | Reduce -26.8% | 17,219 | $15K |
| JPMorgan Chase & Co. | 0.00% | Reduce -79.6% | 17,071 | $15K |
| SG Americas Securities, LLC | 0.00% | Reduce -48.0% | 17,505 | $15K |
| Flagship Private Wealth, LLC | 0.00% | No change | 14,158 | $13K |
| Procyon Advisors, LLC | 0.00% | No change | 13,671 | $12K |
| Balyasny Asset Management L.P. | 0.00% | New | 13,629 | $12K |
| Raymond James Financial Inc. | 0.00% | New | 13,008 | $12K |
| Laurion Capital Management LP | 0.00% | New | 12,749 | $11K |
| NorthCrest Asset Manangement, LLC | 0.00% | Reduce -7.6% | 11,218 | $11K |
| Callan Family Office, LLC | 0.00% | New | 12,119 | $11K |
| Jefferies Financial Group Inc. | 0.00% | New | 11,350 | $10K |
| Integrated Wealth Concepts LLC | 0.00% | Reduce -21.8% | 11,333 | $10K |
| NewEdge Advisors, LLC | 0.00% | Reduce -29.4% | 11,168 | $10K |
| Abel Hall, LLC | 0.00% | New | 11,060 | $10K |
| Krilogy Financial LLC | 0.00% | Reduce -36.4% | 10,635 | $9K |
| Schonfeld Strategic Advisors LLC | 0.00% | New | 10,439 | $9K |
| Cresset Asset Management, LLC | 0.00% | No change | 10,207 | $9K |
| Apollon Wealth Management, LLC | 0.00% | New | 10,056 | $9K |
| Red Reef Advisors LLC | 0.01% | No change | 10,000 | $9K |
| Verde Capital Management | 0.00% | New | 10,000 | $9K |
| Glen Eagle Advisors, LLC | 0.00% | No change | 10,000 | $9K |
| Kestra Private Wealth Services, LLC | 0.00% | No change | 10,000 | $9K |
| Mirae Asset Global Investments Co., Ltd. | 0.00% | Reduce -13.3% | 8,847 | $8K |
| Royal Bank of Canada | 0.00% | Add +7666.1% | 8,465 | $7K |
| Osaic Holdings, Inc. | 0.00% | Reduce -2.0% | 7,813 | $7K |
| Russell Investments Group, Ltd. | 0.00% | Reduce -36.3% | 7,551 | $7K |
| EverSource Wealth Advisors, LLC | 0.00% | Reduce -0.7% | 5,417 | $5K |
| Allworth Financial LP | 0.00% | Reduce -29.5% | 4,814 | $4K |
| Citigroup Inc. | 0.00% | Reduce -65.0% | 4,659 | $4K |
| GF Fund Management Co. LTD. | 0.00% | Add +12.4% | 4,185 | $4K |
| MTM Investment Management, LLC | 0.00% | No change | 4,125 | $4K |
| N.E.W. Advisory Services LLC | 0.00% | No change | 3,854 | $3K |
| Pinney & Scofield, Inc. | 0.00% | No change | 3,680 | $3K |
| FNY Investment Advisers, LLC | 0.00% | No change | 4,000 | $3K |
| Essential Partners LLC | 0.00% | Reduce -80.0% | 3,094 | $3K |
| IFP Advisors, Inc | 0.00% | Reduce -3.9% | 2,020 | $2K |
| Archer Investment Corp | 0.00% | No change | 2,000 | $2K |
| Steward Partners Investment Advisory, LLC | 0.00% | No change | 2,000 | $2K |
| Rothschild Investment LLC | 0.00% | Reduce -14.9% | 1,436 | $1K |
| GAMMA Investing LLC | 0.00% | Reduce -25.0% | 1,373 | $1K |
| Fortitude Family Office, LLC | 0.00% | New | 1,245 | $1K |
| Farther Finance Advisors, LLC | 0.00% | Reduce -28.1% | 959 | $849 |
| True Wealth Design, LLC | 0.00% | Add +42.0% | 720 | $638 |
| Rialto Wealth Management, LLC | 0.00% | Add +10.4% | 562 | $498 |
| Bangor Savings Bank | 0.00% | Add +376.2% | 500 | $443 |
| TD Waterhouse Canada Inc. | 0.00% | No change | 300 | $276 |
| Larson Financial Group LLC | 0.00% | New | 300 | $266 |
| Harbour Investments, Inc. | 0.00% | Add +19.6% | 299 | $265 |
| Medallion Wealth Advisors, LLC | 0.00% | Reduce -48.5% | 242 | $213 |
| Gill Capital Partners, LLC | 0.00% | No change | 200 | $177 |
| SJS Investment Consulting Inc. | 0.00% | Add +55.5% | 185 | $164 |
| Transamerica Financial Advisors, LLC | 0.00% | New | 132 | $116 |
| Clearstead Advisors, LLC | 0.00% | New | 53 | $47 |
| Federation des caisses Desjardins du Quebec | 0.00% | No change | 50 | $44 |
| Optiver Holding B.V. | 0.00% | Reduce -96.3% | 30 | $27 |
| JPL Wealth Management, LLC | 0.00% | New | 26 | $24 |
| Caitong International Asset Management Co., Ltd | 0.00% | Reduce -99.7% | 1 | $1 |
"% of holder's portfolio" is QSI's weight in each manager's 13F, not the share of Quantum-Si Inc. the manager owns.