Quantum-SiQSI
13F holders, Q4 2025 (December 31)135holders +10
29new positions
19sold out
4famous investors
$1.10avg. 13F price*
At the end of Q4 2025, 135 institutions reported holding Quantum-Si Inc. (QSI) in their 13F filings, up 10 from Q3 2025. 29 opened new positions and 19 sold out. The largest holders were BlackRock, Inc. ($14.4M), Vanguard Group Inc. ($10.6M) and ARK Investment Management ($7.7M). 4 famous investors held it, including Cathie Wood (0.1% of ARK Investment Management's portfolio), Ken Griffin (0.0% of Citadel Advisors's portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Quantum-Si Inc.
- CUSIP
- 74765K105
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 29 | $1.2M |
| Exits | 19 | $1.9M |
All 13F filers, Q3 2025 → Q4 2025: 10,005,192 shares bought and 7,139,142 shares sold, net +2,866,050 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 135 holders
| BlackRock, Inc. | 0.00% | Add +15.3% | 13,054,057 | $14.4M |
| Vanguard Group Inc. | 0.00% | Add +10.2% | 9,607,022 | $10.6M |
| ARK Investment Management | 0.05% | Reduce -7.9% | 7,021,571 | $7.7M |
| Sumitomo Mitsui Trust Group, Inc. | 0.00% | Reduce -10.1% | 4,690,720 | $5.2M |
| Amova Asset Management Americas, Inc. | 0.06% | Reduce -10.1% | 4,690,720 | $5.1M |
| Geode Capital Management, LLC | 0.00% | Add +9.8% | 4,114,375 | $4.5M |
| State Street Corp. | 0.00% | Add +26.4% | 3,562,721 | $3.9M |
| Citadel Advisors | 0.00% | Add +557.4% | 2,676,097 | $2.9M |
| Susquehanna International Group, LLP | 0.00% | Add +14.1% | 2,327,785 | $2.6M |
| Northern Trust Corp. | 0.00% | Reduce -5.0% | 2,207,936 | $2.4M |
| UBS Group AG | 0.00% | Add +187.1% | 1,449,512 | $1.6M |
| Two Sigma Investments, LP | 0.00% | Add +168.3% | 1,384,181 | $1.5M |
| Jane Street Group, LLC | 0.00% | Reduce -31.4% | 1,104,033 | $1.2M |
| Fosun International Ltd | 0.21% | No change | 743,935 | $818K |
| Charles Schwab Investment Management Inc. | 0.00% | Add +0.0% | 468,174 | $515K |
| XTX Topco Ltd | 0.01% | Add +206.9% | 461,982 | $508K |
| Nuveen, LLC | 0.00% | No change | 447,519 | $492K |
| Bank of New York Mellon Corp | 0.00% | Add +2.9% | 406,291 | $447K |
| Invesco Ltd. | 0.00% | Add +36.2% | 402,821 | $443K |
| Morgan Stanley | 0.00% | Add +47.6% | 399,994 | $440K |
| Goldman Sachs Group Inc. | 0.00% | Reduce -0.1% | 386,824 | $426K |
| Knollwood Investment Advisory, LLC | 0.03% | No change | 300,000 | $330K |
| Quadrature Capital Ltd | 0.00% | New | 276,889 | $305K |
| Alliancebernstein L.P. | 0.00% | No change | 272,180 | $299K |
| Barclays PLC | 0.00% | Add +21.8% | 269,415 | $296K |
| Bridgeway Capital Management, LLC | 0.01% | No change | 261,100 | $287K |
| Bank of America Corp. | 0.00% | Reduce -25.7% | 258,445 | $284K |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd | 0.02% | Add +34.2% | 253,895 | $279K |
| Group One Trading LLC | 0.01% | Reduce -34.9% | 245,801 | $270K |
| Virtu Financial LLC | 0.01% | New | 238,379 | $262K |
| Rhumbline Advisers | 0.00% | Reduce -12.0% | 193,595 | $213K |
| Millennium Management | 0.00% | Reduce -92.8% | 191,791 | $211K |
| Verdence Capital Advisors LLC | 0.01% | Add +14.6% | 187,805 | $207K |
| Wells Fargo & Company | 0.00% | Add +29.6% | 176,132 | $194K |
| Los Angeles Capital Management LLC | 0.00% | New | 93,010 | $189K |
| Shay Capital LLC | 0.03% | Reduce -3.5% | 149,132 | $164K |
| Deutsche Bank AG | 0.00% | Add +6.2% | 119,028 | $131K |
| HRT Financial LP | 0.00% | New | 104,292 | $114K |
| Jones Financial Companies LLLP | 0.00% | Add +5.8% | 98,900 | $109K |
| FMR LLC | 0.00% | Add +8.2% | 97,925 | $108K |
| T. Rowe Price Associates Inc. | 0.00% | Add +4.8% | 96,486 | $107K |
| AQR Capital Management | 0.00% | Add +3.4% | 86,689 | $95K |
| Simplex Trading, LLC | 0.00% | Reduce -47.8% | 80,507 | $89K |
| JPMorgan Chase & Co. | 0.00% | Add +21.5% | 76,909 | $85K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Reduce -0.0% | 72,970 | $80K |
| Intech Investment Management LLC | 0.00% | Reduce -12.2% | 65,636 | $72K |
| Mariner, LLC | 0.00% | Add +12.6% | 56,880 | $63K |
| Green Alpha Advisors, LLC | 0.05% | Reduce -76.2% | 51,528 | $57K |
| AlphaCore Capital LLC | 0.00% | Reduce -52.0% | 49,350 | $54K |
| Manufacturers Life Insurance Company, The | 0.00% | Add +1.5% | 48,372 | $53K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | No change | 46,170 | $51K |
| Scientech Research LLC | 0.03% | New | 45,915 | $51K |
| Sanctuary Advisors, LLC | 0.00% | Add +16.1% | 42,413 | $47K |
| State Board of Administration of Florida Retirement System | 0.00% | New | 41,282 | $45K |
| Cambridge Investment Research Advisors, Inc. | 0.00% | Reduce -2.8% | 37,767 | $42K |
| Caitong International Asset Management Co., Ltd | 0.01% | Reduce -36.5% | 37,964 | $42K |
| ProShare Advisors LLC | 0.00% | Add +39.0% | 37,341 | $41K |
| Red Wave Investments LLC | 0.01% | No change | 37,000 | $41K |
| BNP Paribas Financial Markets | 0.00% | Add +19.1% | 36,276 | $40K |
| Captrust Financial Advisors | 0.00% | Reduce -0.7% | 34,603 | $38K |
| JTC Employer Solutions Trustee Ltd | 0.00% | No change | 34,540 | $38K |
| MetLife Investment Management, LLC | 0.00% | Reduce -47.0% | 34,222 | $38K |
| SBI Securities Co., Ltd. | 0.00% | Add +1.6% | 34,163 | $38K |
| Sei Investments Co. | 0.00% | No change | 33,103 | $36K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +122.3% | 32,595 | $36K |
| China Universal Asset Management Co., Ltd. | 0.00% | New | 31,865 | $35K |
| Dimensional Fund Advisors LP | 0.00% | New | 31,320 | $34K |
| Northern Lights Advisors, Inc. | 0.02% | — | 29,989 | $33K |
| SG Americas Securities, LLC | 0.00% | Reduce -30.9% | 29,106 | $32K |
| Commonwealth Equity Services, LLC | 0.00% | Reduce -22.7% | 27,960 | $31K |
| Voya Investment Management LLC | 0.00% | No change | 27,246 | $30K |
| Wealth Management Associates, Inc. | 0.01% | Reduce -12.9% | 26,950 | $30K |
| Russell Investments Group, Ltd. | 0.00% | Reduce -16.0% | 26,893 | $30K |
| Neuberger Berman Group LLC | 0.00% | New | 26,820 | $30K |
| New York State Common Retirement Fund | 0.00% | No change | 26,084 | $29K |
| LPL Financial LLC | 0.00% | Reduce -11.4% | 25,217 | $28K |
| Leonteq Securities AG | 0.00% | No change | 25,000 | $28K |
| HBW Advisory Services LLC | 0.00% | Reduce -0.3% | 24,163 | $27K |
| Curbstone Financial Management Corp | 0.01% | New | 24,000 | $26K |
| Vanguard Personalized Indexing Management, LLC | 0.00% | Reduce -5.5% | 23,799 | $26K |
| Atom Investors LP | 0.00% | New | 21,995 | $24K |
| Capital Investment Advisory Services, LLC | 0.00% | No change | 20,000 | $22K |
| Victory Capital Management Inc. | 0.00% | Add +13.3% | 19,797 | $22K |
| Citigroup Inc. | 0.00% | Reduce -16.5% | 19,776 | $22K |
| Balyasny Asset Management L.P. | 0.00% | Reduce -2.5% | 19,300 | $21K |
| Blueshift Asset Management, LLC | 0.01% | New | 17,442 | $19K |
| Kovack Advisors, Inc. | 0.00% | New | 16,800 | $18K |
| Stratos Wealth Advisors, LLC | 0.00% | Add +11.1% | 15,036 | $17K |
| Graham Capital Management, L.P. | 0.00% | New | 14,422 | $16K |
| Ameritas Investment Partners, Inc. | 0.00% | No change | 14,401 | $16K |
| Flagship Private Wealth, LLC | 0.01% | No change | 14,158 | $16K |
| NewEdge Advisors, LLC | 0.00% | Add +38.1% | 14,042 | $15K |
| Procyon Advisors, LLC | 0.00% | No change | 13,671 | $15K |
| Ewa, LLC | 0.00% | Reduce -20.4% | 13,632 | $15K |
| Legal & General Group Plc | 0.00% | No change | 12,860 | $14K |
| McAdam, LLC | 0.00% | New | 12,329 | $14K |
| Xponance LLC | 0.00% | Reduce -1.1% | 11,824 | $13K |
| State of Wyoming | 0.00% | New | 11,089 | $12K |
| Cibc World Markets Corp. | 0.00% | — | 10,392 | $11K |
| Cresset Asset Management, LLC | 0.00% | New | 10,207 | $11K |
| Kestra Advisory Services, LLC | 0.00% | No change | 10,090 | $11K |
| Red Reef Advisors LLC | 0.01% | — | 10,000 | $11K |
| Glen Eagle Advisors, LLC | 0.00% | No change | 10,000 | $11K |
| Hollencrest Capital Management | 0.00% | Reduce -71.4% | 10,000 | $11K |
| California State Teachers Retirement System | 0.00% | Add +9.7% | 9,661 | $11K |
| Mirae Asset Global Investments Co., Ltd. | 0.00% | New | 9,503 | $10K |
| Sterling Capital Management LLC | 0.00% | Reduce -16.5% | 9,054 | $10K |
| Cwm, LLC | 0.00% | Add +224.4% | 6,994 | $8K |
| Osaic Holdings, Inc. | 0.00% | Add +482.1% | 7,101 | $8K |
| GAMMA Investing LLC | 0.00% | New | 6,991 | $8K |
| Wolverine Asset Management LLC | 0.00% | Reduce -21.1% | 6,170 | $7K |
| Blue Trust, Inc. | 0.00% | New | 5,000 | $6K |
| Tucker Asset Management LLC | 0.00% | New | 4,714 | $5K |
| Amalgamated Bank | 0.00% | Add +19.1% | 4,935 | $5K |
| Royal Bank of Canada | 0.00% | Reduce -99.2% | 4,467 | $5K |
| MTM Investment Management, LLC | 0.00% | No change | 4,125 | $5K |
| N.E.W. Advisory Services LLC | 0.00% | No change | 3,854 | $4K |
| GF Fund Management Co. LTD. | 0.00% | New | 3,723 | $4K |
| Pinney & Scofield, Inc. | 0.00% | No change | 3,680 | $4K |
| FNY Investment Advisers, LLC | 0.00% | New | 4,000 | $4K |
| Archer Investment Corp | 0.00% | No change | 2,000 | $2K |
| Sound Income Strategies, LLC | 0.00% | New | 1,000 | $1K |
| Signature Resources Capital Management, LLC | 0.00% | New | 1,000 | $1K |
| Optiver Holding B.V. | 0.00% | Reduce -17.1% | 927 | $1K |
| TD Waterhouse Canada Inc. | 0.00% | No change | 800 | $872 |
| Nisa Investment Advisors, LLC | 0.00% | No change | 608 | $669 |
| Medallion Wealth Advisors, LLC | 0.00% | Add +94.2% | 470 | $517 |
| Allworth Financial LP | 0.00% | Reduce -48.8% | 436 | $480 |
| EverSource Wealth Advisors, LLC | 0.00% | No change | 427 | $470 |
| United Financial Planning Group LLC | 0.00% | New | 200 | $220 |
| Rothschild Investment LLC | 0.00% | New | 70 | $77 |
| Walleye Capital LLC | 0.00% | New | 58 | $64 |
| Federation des caisses Desjardins du Quebec | 0.00% | No change | 50 | $55 |
| SageView Advisory Group, LLC | 0.00% | New | 17 | $19 |
| Capital Advisors, Ltd. LLC | 0.00% | No change | 58 | $0 |
"% of holder's portfolio" is QSI's weight in each manager's 13F, not the share of Quantum-Si Inc. the manager owns.