Quantum-SiQSI
13F holders, Q1 2026 (March 31)157holders +22
40new positions
21sold out
4famous investors
$0.78avg. 13F price*
At the end of Q1 2026, 157 institutions reported holding Quantum-Si Inc. (QSI) in their 13F filings, up 22 from Q4 2025. 40 opened new positions and 21 sold out. The largest holders were BlackRock, Inc. ($10.4M), Vanguard Capital Management LLC ($5.4M) and ARK Investment Management ($5.3M). 4 famous investors held it, including Cathie Wood (0.0% of ARK Investment Management's portfolio), Cliff Asness (0.0% of AQR Capital Management's portfolio) and Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio).
- Company
- Quantum-Si Inc.
- CUSIP
- 74765K105
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 40 | $1.0M |
| Exits | 21 | $2.1M |
All 13F filers, Q4 2025 → Q1 2026: 5,204,680 shares bought and 9,922,521 shares sold, net −4,717,841 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 157 holders
| BlackRock, Inc. | 0.00% | Add +2.8% | 13,414,949 | $10.4M |
| Vanguard Capital Management LLC | 0.00% | — | 7,021,907 | $5.4M |
| ARK Investment Management | 0.04% | Reduce -2.0% | 6,878,899 | $5.3M |
| Amova Asset Management Americas, Inc. | 0.05% | Reduce -6.4% | 4,391,666 | $3.4M |
| Sumitomo Mitsui Trust Group, Inc. | 0.00% | Reduce -6.4% | 4,391,666 | $3.4M |
| Geode Capital Management, LLC | 0.00% | Reduce -6.8% | 3,835,121 | $3.0M |
| State Street Corp. | 0.00% | Add +5.8% | 3,770,689 | $2.9M |
| AQR Capital Management | 0.00% | Add +2659.5% | 2,392,179 | $1.9M |
| UBS Group AG | 0.00% | Add +17.5% | 1,702,527 | $1.3M |
| Vanguard Portfolio Management LLC | 0.00% | — | 1,520,646 | $1.2M |
| Susquehanna International Group, LLP | 0.00% | Reduce -37.1% | 1,464,568 | $1.1M |
| Northern Trust Corp. | 0.00% | Reduce -42.9% | 1,260,701 | $976K |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 1,117,252 | $865K |
| Fosun International Ltd | 0.16% | No change | 743,935 | $576K |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -2.3% | 457,571 | $354K |
| Nuveen, LLC | 0.00% | Add +0.9% | 451,367 | $349K |
| Goldman Sachs Group Inc. | 0.00% | Add +14.8% | 444,177 | $344K |
| Invesco Ltd. | 0.00% | Add +1.0% | 406,690 | $315K |
| XTX Topco Ltd | 0.01% | Reduce -15.7% | 389,254 | $301K |
| Alliancebernstein L.P. | 0.00% | No change | 272,180 | $299K |
| Bank of New York Mellon Corp | 0.00% | Reduce -5.7% | 383,088 | $297K |
| Ieq Capital, LLC | 0.00% | New | 357,688 | $277K |
| Knollwood Investment Advisory, LLC | 0.02% | No change | 300,000 | $232K |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd | 0.02% | Add +15.1% | 292,107 | $226K |
| Group One Trading LLC | 0.01% | Add +15.5% | 283,981 | $220K |
| Bridgeway Capital Management, LLC | 0.00% | No change | 261,100 | $202K |
| IMC-Chicago, LLC | 0.00% | New | 220,876 | $171K |
| CIBC Bancorp USA Inc. | 0.00% | — | 208,510 | $161K |
| Verdence Capital Advisors LLC | 0.01% | Add +8.6% | 203,855 | $158K |
| Mariner, LLC | 0.00% | Add +251.1% | 199,692 | $155K |
| Rhumbline Advisers | 0.00% | Reduce -0.3% | 193,068 | $149K |
| Bank of America Corp. | 0.00% | Reduce -37.3% | 161,987 | $125K |
| Shay Capital LLC | 0.02% | Add +1.2% | 150,922 | $117K |
| Morgan Stanley | 0.00% | Reduce -67.5% | 129,940 | $101K |
| AlphaCore Capital LLC | 0.00% | Add +160.3% | 128,449 | $99K |
| Cwm, LLC | 0.00% | Add +1710.6% | 126,632 | $98K |
| Deutsche Bank AG | 0.00% | No change | 119,028 | $92K |
| Renaissance Technologies | 0.00% | New | 117,900 | $91K |
| Los Angeles Capital Management LLC | 0.00% | Add +25.1% | 116,341 | $90K |
| Jones Financial Companies LLLP | 0.00% | Add +11.1% | 109,900 | $84K |
| MetLife Investment Management, LLC | 0.00% | Add +196.8% | 101,555 | $79K |
| T. Rowe Price Associates Inc. | 0.00% | No change | 96,486 | $75K |
| Simplex Trading, LLC | 0.00% | Add +12.4% | 90,531 | $70K |
| Vanguard Global Advisers, LLC | 0.00% | — | 84,757 | $66K |
| Cerity Partners LLC | 0.00% | New | 80,650 | $62K |
| JPMorgan Chase & Co. | 0.00% | Add +8.6% | 83,519 | $62K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +2.7% | 74,928 | $58K |
| Wealth Enhancement Advisory Services, LLC | 0.00% | New | 89,536 | $58K |
| Captrust Financial Advisors | 0.00% | Add +99.5% | 69,036 | $53K |
| Virtu Financial LLC | 0.00% | Reduce -72.8% | 64,751 | $50K |
| Wells Fargo & Company | 0.00% | Reduce -63.7% | 63,868 | $49K |
| Quantbot Technologies LP | 0.00% | New | 58,461 | $45K |
| Mercer Global Advisors Inc. | 0.00% | New | 55,195 | $43K |
| Two Sigma Investments, LP | 0.00% | Reduce -96.2% | 52,924 | $41K |
| Creative Planning | 0.00% | New | 52,548 | $41K |
| Manufacturers Life Insurance Company, The | 0.00% | Reduce -1.9% | 47,453 | $37K |
| Intech Investment Management LLC | 0.00% | Reduce -29.2% | 46,486 | $36K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | No change | 46,170 | $36K |
| Green Alpha Advisors, LLC | 0.03% | Reduce -16.1% | 43,208 | $33K |
| Sanctuary Advisors, LLC | 0.00% | Add +1.0% | 42,824 | $33K |
| Cambridge Investment Research Advisors, Inc. | 0.00% | Add +10.7% | 41,809 | $32K |
| State Board of Administration of Florida Retirement System | 0.00% | No change | 41,282 | $32K |
| NINE MASTS CAPITAL Ltd | 0.01% | New | 41,134 | $32K |
| Hollencrest Capital Management | 0.00% | Add +301.1% | 40,111 | $31K |
| Barclays PLC | 0.00% | Reduce -85.5% | 39,137 | $30K |
| BNP Paribas Financial Markets | 0.00% | Add +5.8% | 38,390 | $30K |
| Red Wave Investments LLC | 0.01% | No change | 37,000 | $29K |
| Merit Financial Group, LLC | 0.00% | New | 36,347 | $28K |
| JTC Employer Solutions Trustee Ltd | 0.00% | No change | 34,540 | $27K |
| China Universal Asset Management Co., Ltd. | 0.00% | Add +8.9% | 34,702 | $27K |
| SG Americas Securities, LLC | 0.00% | Add +15.7% | 33,677 | $26K |
| ProShare Advisors LLC | 0.00% | Reduce -11.0% | 33,239 | $26K |
| Sei Investments Co. | 0.00% | No change | 33,103 | $26K |
| SBI Securities Co., Ltd. | 0.00% | Reduce -5.9% | 32,133 | $25K |
| FMR LLC | 0.00% | Reduce -67.3% | 31,968 | $25K |
| Northern Lights Advisors, Inc. | 0.02% | No change | 29,989 | $23K |
| Commonwealth Equity Services, LLC | 0.00% | Add +6.5% | 29,792 | $23K |
| Brighton Jones LLC | 0.00% | New | 27,560 | $21K |
| Voya Investment Management LLC | 0.00% | No change | 27,246 | $21K |
| Wealth Management Associates, Inc. | 0.01% | No change | 26,950 | $21K |
| New York State Common Retirement Fund | 0.00% | No change | 26,084 | $20K |
| Pallas Capital Advisors LLC | 0.00% | New | 25,757 | $20K |
| Kovack Advisors, Inc. | 0.00% | Add +78.6% | 30,000 | $20K |
| Leonteq Securities AG | 0.00% | No change | 25,000 | $19K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -23.5% | 24,943 | $19K |
| Vanguard Personalized Indexing Management, LLC | 0.00% | Add +0.8% | 23,991 | $19K |
| Focus Partners Wealth | 0.00% | New | 23,517 | $18K |
| HBW Advisory Services LLC | 0.00% | Reduce -6.1% | 22,697 | $18K |
| Krilogy Financial LLC | 0.00% | New | 16,729 | $17K |
| LPL Financial LLC | 0.00% | Reduce -10.9% | 22,467 | $17K |
| Prudential Financial Inc. | 0.00% | New | 21,570 | $17K |
| Capital Investment Advisory Services, LLC | 0.00% | No change | 20,000 | $15K |
| Victory Capital Management Inc. | 0.00% | Add +0.1% | 19,808 | $15K |
| DLK Investment Management, LLC | 0.01% | New | 16,750 | $13K |
| Focus Partners Advisor Solutions, LLC | 0.00% | New | 16,473 | $13K |
| NewEdge Advisors, LLC | 0.00% | Add +12.7% | 15,820 | $12K |
| Citadel Advisors | 0.00% | Reduce -99.4% | 15,546 | $12K |
| Essential Partners LLC | 0.00% | New | 15,436 | $12K |
| Stratos Wealth Advisors, LLC | 0.00% | No change | 15,036 | $12K |
| Integrated Wealth Concepts LLC | 0.00% | New | 14,499 | $11K |
"% of holder's portfolio" is QSI's weight in each manager's 13F, not the share of Quantum-Si Inc. the manager owns.