Quantum-SiQSI
13F holders, Q3 2025 (September 30)125holders −10
13new positions
22sold out
4famous investors
$1.42avg. 13F price*
At the end of Q3 2025, 125 institutions reported holding Quantum-Si Inc. (QSI) in their 13F filings, down 10 from Q2 2025. 13 opened new positions and 22 sold out. The largest holders were BlackRock, Inc. ($16.0M), Vanguard Group Inc. ($12.3M) and ARK Investment Management ($10.7M). 4 famous investors held it, including Cathie Wood (0.1% of ARK Investment Management's portfolio), Israel Englander (0.0% of Millennium Management's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Quantum-Si Inc.
- CUSIP
- 74765K105
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 13 | $2.0M |
| Exits | 22 | $1.9M |
All 13F filers, Q2 2025 → Q3 2025: 5,561,323 shares bought and 5,290,525 shares sold, net +270,798 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 125 holders
| BlackRock, Inc. | 0.00% | Add +4.4% | 11,321,673 | $16.0M |
| Vanguard Group Inc. | 0.00% | Add +0.5% | 8,714,507 | $12.3M |
| ARK Investment Management | 0.06% | Reduce -4.2% | 7,624,042 | $10.7M |
| Amova Asset Management Americas, Inc. | 0.07% | Reduce -7.2% | 5,217,499 | $7.4M |
| Sumitomo Mitsui Trust Group, Inc. | 0.00% | Reduce -7.2% | 5,217,499 | $7.4M |
| Geode Capital Management, LLC | 0.00% | Add +8.7% | 3,747,169 | $5.3M |
| State Street Corp. | 0.00% | Add +2.2% | 2,817,490 | $4.0M |
| Millennium Management | 0.00% | Reduce -29.4% | 2,669,959 | $3.8M |
| Northern Trust Corp. | 0.00% | Add +1.5% | 2,323,042 | $3.3M |
| Susquehanna International Group, LLP | 0.00% | Add +107.0% | 2,041,095 | $2.9M |
| Jane Street Group, LLC | 0.00% | Add +465.4% | 1,610,023 | $2.3M |
| Fosun International Ltd | 0.39% | No change | 743,935 | $1.0M |
| Squarepoint Ops LLC | 0.00% | New | 613,475 | $865K |
| Royal Bank of Canada | 0.00% | Add +15.6% | 532,293 | $750K |
| Two Sigma Investments, LP | 0.00% | Reduce -8.6% | 515,852 | $727K |
| UBS Group AG | 0.00% | Reduce -36.1% | 504,859 | $712K |
| Charles Schwab Investment Management Inc. | 0.00% | Add +8.5% | 468,088 | $660K |
| Nuveen, LLC | 0.00% | Reduce -60.3% | 447,519 | $631K |
| Citadel Advisors | 0.00% | Reduce -27.1% | 407,047 | $574K |
| Bank of New York Mellon Corp | 0.00% | Add +12.0% | 394,905 | $557K |
| Goldman Sachs Group Inc. | 0.00% | Reduce -56.7% | 387,151 | $546K |
| Group One Trading LLC | 0.02% | Add +180.6% | 377,774 | $533K |
| Bank of America Corp. | 0.00% | Reduce -25.3% | 348,007 | $491K |
| Knollwood Investment Advisory, LLC | 0.04% | No change | 300,000 | $423K |
| Invesco Ltd. | 0.00% | Add +51.3% | 295,728 | $417K |
| Alliancebernstein L.P. | 0.00% | No change | 272,180 | $384K |
| Verdence Capital Advisors LLC | 0.02% | New | 163,830 | $383K |
| Morgan Stanley | 0.00% | Reduce -6.5% | 271,000 | $382K |
| Bridgeway Capital Management, LLC | 0.01% | Add +33.1% | 261,100 | $368K |
| Barclays PLC | 0.00% | Reduce -7.4% | 221,210 | $312K |
| Rhumbline Advisers | 0.00% | Add +7.8% | 219,965 | $310K |
| Green Alpha Advisors, LLC | 0.29% | Reduce -5.4% | 216,032 | $305K |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd | 0.02% | Add +61.9% | 189,174 | $267K |
| IMC-Chicago, LLC | 0.00% | New | 185,117 | $261K |
| Pathstone Holdings, LLC | 0.00% | Reduce -7.5% | 183,934 | $259K |
| Summit Wealth Group LLC / Co. | 0.02% | New | 2,330 | $225K |
| Shay Capital LLC | 0.04% | Add +19.2% | 154,572 | $218K |
| Simplex Trading, LLC | 0.00% | Add +46.0% | 154,083 | $217K |
| XTX Topco Ltd | 0.01% | Add +223.9% | 150,532 | $212K |
| Wells Fargo & Company | 0.00% | Add +33.7% | 135,950 | $192K |
| Deutsche Bank AG | 0.00% | Add +13.8% | 112,084 | $158K |
| AlphaCore Capital LLC | 0.00% | Add +22.5% | 102,850 | $145K |
| Jones Financial Companies LLLP | 0.00% | Add +99.4% | 93,500 | $139K |
| T. Rowe Price Associates Inc. | 0.00% | Reduce -23.6% | 92,034 | $130K |
| FMR LLC | 0.00% | Add +388.8% | 90,520 | $128K |
| AQR Capital Management | 0.00% | Reduce -31.1% | 83,824 | $118K |
| Intech Investment Management LLC | 0.00% | Reduce -15.5% | 74,761 | $105K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Reduce -5.5% | 72,976 | $103K |
| MetLife Investment Management, LLC | 0.00% | Reduce -16.5% | 64,568 | $91K |
| JPMorgan Chase & Co. | 0.00% | Reduce -5.1% | 63,280 | $89K |
| Caitong International Asset Management Co., Ltd | 0.06% | New | 59,774 | $84K |
| Mariner, LLC | 0.00% | Reduce -0.1% | 50,529 | $71K |
| Manufacturers Life Insurance Company, The | 0.00% | Reduce -2.9% | 47,666 | $67K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | Add +48.3% | 46,170 | $65K |
| SG Americas Securities, LLC | 0.00% | Add +30.8% | 42,107 | $59K |
| Engineers Gate Manager LP | 0.00% | New | 41,451 | $58K |
| Cambridge Investment Research Advisors, Inc. | 0.00% | No change | 38,867 | $55K |
| Elite Life Management LLC | 0.11% | New | 20,611 | $54K |
| Red Wave Investments LLC | 0.02% | No change | 37,000 | $52K |
| Sanctuary Advisors, LLC | 0.00% | Add +0.5% | 36,516 | $51K |
| Commonwealth Equity Services, LLC | 0.00% | Add +41.8% | 36,179 | $51K |
| Hollencrest Capital Management | 0.00% | Add +40.0% | 35,000 | $49K |
| Captrust Financial Advisors | 0.00% | Add +1.5% | 34,828 | $49K |
| JTC Employer Solutions Trustee Ltd | 0.00% | Add +158.9% | 34,540 | $49K |
| SBI Securities Co., Ltd. | 0.00% | Add +28.6% | 33,616 | $47K |
| Sei Investments Co. | 0.00% | No change | 33,103 | $47K |
| Wolverine Trading, LLC | 0.00% | Reduce -18.3% | 33,034 | $46K |
| Russell Investments Group, Ltd. | 0.00% | Add +7.0% | 32,006 | $45K |
| Wealth Management Associates, Inc. | 0.02% | Add +14.8% | 30,950 | $44K |
| BNP Paribas Financial Markets | 0.00% | Add +101.3% | 30,464 | $43K |
| LPL Financial LLC | 0.00% | Add +22.2% | 28,460 | $40K |
| Voya Investment Management LLC | 0.00% | Reduce -29.9% | 27,246 | $38K |
| Mercer Global Advisors Inc. | 0.00% | Add +6.8% | 26,989 | $38K |
| ProShare Advisors LLC | 0.00% | Reduce -7.1% | 26,860 | $38K |
| New York State Common Retirement Fund | 0.00% | No change | 26,084 | $37K |
| Vanguard Personalized Indexing Management, LLC | 0.00% | Add +4.6% | 25,193 | $36K |
| Leonteq Securities AG | 0.00% | No change | 25,000 | $35K |
| HBW Advisory Services LLC | 0.00% | Reduce -0.0% | 24,243 | $34K |
| Citigroup Inc. | 0.00% | Reduce -51.8% | 23,673 | $33K |
| Capital Investment Advisory Services, LLC | 0.00% | Add +100.0% | 20,000 | $28K |
| Balyasny Asset Management L.P. | 0.00% | New | 19,802 | $28K |
| DLK Investment Management, LLC | 0.01% | No change | 19,750 | $28K |
| Victory Capital Management Inc. | 0.00% | Add +7.8% | 17,476 | $25K |
| Ewa, LLC | 0.01% | Reduce -74.9% | 17,119 | $24K |
| CIBC Bancorp USA Inc. | 0.00% | — | 16,745 | $24K |
| Jump Financial, LLC | 0.00% | New | 15,100 | $21K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -1.6% | 14,661 | $21K |
| Ameritas Investment Partners, Inc. | 0.00% | No change | 14,401 | $20K |
| Flagship Private Wealth, LLC | 0.01% | No change | 14,158 | $20K |
| Cibc World Market Inc. | 0.00% | Reduce -0.1% | 14,000 | $20K |
| Procyon Advisors, LLC | 0.00% | No change | 13,671 | $19K |
| Stratos Wealth Advisors, LLC | 0.00% | Reduce -24.2% | 13,536 | $19K |
| Legal & General Group Plc | 0.00% | No change | 12,860 | $18K |
| Prudential Financial Inc. | 0.00% | No change | 12,850 | $18K |
| Xponance LLC | 0.00% | Add +8.2% | 11,952 | $17K |
| Principal Financial Group Inc. | 0.00% | New | 11,156 | $16K |
| Sterling Capital Management LLC | 0.00% | Add +219.3% | 10,839 | $15K |
| Mark Sheptoff Financial Planning, LLC | 0.01% | Reduce -27.6% | 10,500 | $15K |
| NewEdge Advisors, LLC | 0.00% | Reduce -0.8% | 10,170 | $14K |
| Kestra Advisory Services, LLC | 0.00% | Reduce -0.4% | 10,090 | $14K |
"% of holder's portfolio" is QSI's weight in each manager's 13F, not the share of Quantum-Si Inc. the manager owns.