Who owns QUANTUM SI INC?
- Ticker: QSI
- CUSIP Number: 74765k105
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Analyze quarterly positions in Quantum Si with up to 7 years of data, all consolidated into one spreadsheet
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Top investors of Quantum Si stock
Who bought or sold QUANTUM SI INC this quarter?
| Fund or Company Name | Shares Held | Valued At | Change in Shares | As Of | Actions |
|---|---|---|---|---|---|
| BlackRock | 13M | $14M | 15% | Dec 2025 |
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| Vanguard Group | 9.6M | $11M | 10% | Dec 2025 |
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| ARK Investment Management | 7.0M | $7.7M | -8% | Dec 2025 |
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| Sumitomo Mitsui Trust Holdings | 4.7M | $5.2M | -10% | Dec 2025 |
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| Nikko Asset Management Americas | 4.7M | $5.1M | -10% | Dec 2025 |
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| Geode Capital Management | 4.1M | $4.5M | 10% | Dec 2025 |
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| State Street Corporation | 3.6M | $3.9M | 26% | Dec 2025 |
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| Susquehanna International | 2.9M | $3.1M | 14% | Dec 2025 |
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| Millennium Management | 2.7M | $3.8M | -29% | Sep 2025 |
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| Northern Trust | 2.2M | $2.4M | -5% | Dec 2025 |
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| UBS Group | 1.4M | $1.6M | 187% | Dec 2025 |
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| Jane Street | 1.4M | $1.6M | -15% | Dec 2025 |
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| Citadel Advisors | 1.2M | $1.7M | -10% | Sep 2025 |
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| Fosun International | 744k | $818k | 0% | Dec 2025 |
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| Royal Bank of Canada | 532k | $748k | 16% | Sep 2025 |
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| Two Sigma Investments | 516k | $727k | -9% | Sep 2025 |
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| Charles Schwab Investment Management | 468k | $515k | 0% | Dec 2025 |
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| XTX Topco | 462k | $508k | 207% | Dec 2025 |
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| Nuveen | 448k | $492k | 0% | Dec 2025 |
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| Bank of New York Mellon | 406k | $447k | 3% | Dec 2025 |
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| Invesco | 403k | $443k | 36% | Dec 2025 |
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| Goldman Sachs Group | 387k | $426k | 0% | Dec 2025 |
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| Knollwood Investment Advisory | 300k | $330k | 0% | Dec 2025 |
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| Quadrature Capital | 277k | $305k | 100% | Dec 2025 |
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| Wolverine Trading | 273k | $379k | 13% | Sep 2025 |
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| Alliancebernstein | 272k | $384k | 0% | Sep 2025 |
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| Barclays | 269k | $296k | 22% | Dec 2025 |
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| Bridgeway Capital Management | 261k | $368k | 33% | Sep 2025 |
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| Davy Asset Management | 254k | $279k | 34% | Dec 2025 |
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| Group One Trading | 246k | $270k | -35% | Dec 2025 |
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| Virtu Financial | 238k | $262k | 100% | Dec 2025 |
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| Rhumbline Advisers | 194k | $213k | -12% | Dec 2025 |
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| Verdence Capital Advisors | 188k | $207k | 15% | Dec 2025 |
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| Wells Fargo & Company | 176k | $194k | 30% | Dec 2025 |
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| None | 149k | $164k | 100% | Dec 2025 |
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| Deutsche Bank Aktiengesellschaft | 119k | $131k | 6% | Dec 2025 |
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| Hrt Financial | 104k | $114k | 100% | Dec 2025 |
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| Jones Financial Companies, L.L | 99k | $109k | 6% | Dec 2025 |
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| Thomas Stevens, CFA" | 93k | $189k | 100% | Dec 2025 |
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| FMR | 91k | $128k | 389% | Sep 2025 |
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| AQR Capital Management | 84k | $118k | -31% | Sep 2025 |
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| Simplex Trading | 81k | $89k | -48% | Dec 2025 |
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| Mirae Asset Global Etfs Holdings | 73k | $80k | 0% | Dec 2025 |
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| Intech Investment Management | 66k | $72k | -12% | Dec 2025 |
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| Jpmorgan Chase & Co | 63k | $89k | 100% | Sep 2025 |
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| Mariner Wealth Advisors | 57k | $63k | 13% | Dec 2025 |
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| Green Alpha Advisors | 52k | $57k | -76% | Dec 2025 |
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| AlphaCore Capital | 49k | $54k | -52% | Dec 2025 |
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| Manufacturers Life Insurance Company | 48k | $53k | 1% | Dec 2025 |
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| Police & Firemen's Retirement System of New Jersey | 46k | $51k | 0% | Dec 2025 |
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| Scientech Research | 46k | $51k | 100% | Dec 2025 |
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| Sanctuary Advisors | 42k | $47k | 16% | Dec 2025 |
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| Florida State Board of Administration | 41k | $45k | 100% | Dec 2025 |
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| Peak6 | 38k | $42k | -96% | Dec 2025 |
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| Caitong International Asset Management | 38k | $42k | -36% | Dec 2025 |
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| Cambridge Investment Research Advisors | 38k | $42k | -3% | Dec 2025 |
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| ProShare Advisors | 37k | $41k | 39% | Dec 2025 |
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| Red Wave Investments | 37k | $41k | 0% | Dec 2025 |
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| Bnp Paribas Arbitrage, Snc | 36k | $40k | 19% | Dec 2025 |
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| Captrust Financial Advisors | 35k | $38k | -1% | Dec 2025 |
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| JTC Employer Solutions Trustee | 35k | $38k | 0% | Dec 2025 |
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| MetLife Investment Advisors | 34k | $38k | -47% | Dec 2025 |
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| SBI Securities | 34k | $38k | 2% | Dec 2025 |
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| Sei Investments | 33k | $36k | 0% | Dec 2025 |
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| Tower Research Capital | 33k | $36k | 122% | Dec 2025 |
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| China Universal Asset Management | 32k | $35k | 100% | Dec 2025 |
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| Dimensional Fund Advisors | 31k | $35k | 100% | Dec 2025 |
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| SG Americas Securities | 29k | $32k | -31% | Dec 2025 |
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| Commonwealth Equity Services | 28k | $31k | -23% | Dec 2025 |
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| Ing Investment Management | 27k | $30k | 0% | Dec 2025 |
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| Wealth Management Associates | 27k | $30k | -13% | Dec 2025 |
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| Russell Investments | 27k | $30k | -16% | Dec 2025 |
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| Neuberger Berman Group | 27k | $30k | 100% | Dec 2025 |
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| New York State Common Retirement Fund | 26k | $29k | 0% | Dec 2025 |
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| LPL Financial | 25k | $28k | -11% | Dec 2025 |
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| Leonteq Securities | 25k | $28k | 100% | Dec 2025 |
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| HBW Advisory Services | 24k | $27k | 0% | Dec 2025 |
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| Curbstone Financial Management | 24k | $26k | 100% | Dec 2025 |
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| JustInvest | 24k | $26k | -6% | Dec 2025 |
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| Walleye Trading Advisors | 24k | $26k | 100% | Dec 2025 |
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| Atom Investors | 22k | $24k | 100% | Dec 2025 |
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| Walleye Trading | 22k | $24k | 100% | Dec 2025 |
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| Capital Investment Advisory Services | 20k | $22k | 0% | Dec 2025 |
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| Balyasny Asset Management | 20k | $28k | 100% | Sep 2025 |
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| Victory Capital Management | 20k | $22k | 13% | Dec 2025 |
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| Blueshift Asset Management | 17k | $19k | 100% | Dec 2025 |
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| Kovack Advisors | 17k | $19k | 100% | Dec 2025 |
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| CIBC Bancorp USA | 17k | $24k | 100% | Sep 2025 |
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| Stratos Wealth Advisors | 15k | $17k | 11% | Dec 2025 |
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| Belvedere Trading | 15k | $16k | -17% | Dec 2025 |
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| Graham Capital Management | 14k | $16k | 100% | Dec 2025 |
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| Summit Investment Advisors | 14k | $16k | 0% | Dec 2025 |
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| Flagship Private Wealth | 14k | $16k | 0% | Dec 2025 |
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| Goss Wealth Management | 14k | $15k | 38% | Dec 2025 |
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| Procyon Private Wealth Partners | 14k | $15k | 0% | Dec 2025 |
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| Ewa | 14k | $15k | -20% | Dec 2025 |
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| Legal & General Group | 13k | $14k | 0% | Dec 2025 |
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| McAdam | 12k | $14k | 100% | Dec 2025 |
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| Fis | 12k | $13k | -1% | Dec 2025 |
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| State of Wyoming | 11k | $12k | 100% | Dec 2025 |
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| Cibc World Markets | 10k | $11k | -40% | Dec 2025 |
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| Cresset Asset Management | 10k | $11k | 100% | Dec 2025 |
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| Kestra Advisory Services | 10k | $11k | 0% | Dec 2025 |
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| Hollencrest Securities | 10k | $11k | -71% | Dec 2025 |
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| Glen Eagle Advisors | 10k | $11k | 0% | Dec 2025 |
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| California State Teachers Retirement System | 9.7k | $11k | 10% | Dec 2025 |
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| Mirae Asset Global Investments | 9.5k | $11k | 100% | Dec 2025 |
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| Sterling Capital Management | 9.1k | $10k | -16% | Dec 2025 |
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| Advisor Group Holdings | 7.1k | $7.8k | 482% | Dec 2025 |
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| CWM | 7.0k | $8.0k | 224% | Dec 2025 |
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| GAMMA Investing | 7.0k | $7.7k | 100% | Dec 2025 |
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| Wolverine Asset Management | 6.2k | $6.8k | -21% | Dec 2025 |
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| Ronald Blue Trust | 5.0k | $5.5k | 100% | Dec 2025 |
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| Amalgamated Bank | 4.9k | $5.0k | 19% | Dec 2025 |
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| Tucker Asset Management | 4.7k | $5.2k | 100% | Dec 2025 |
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| MTM Investment Management | 4.1k | $4.5k | 0% | Dec 2025 |
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| FNY Investment Advisers | 4.0k | $4.0k | 100% | Dec 2025 |
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| N.E.W. Advisory Services | 3.9k | $4.2k | 0% | Dec 2025 |
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| Gf Fund Management | 3.7k | $4.1k | 100% | Dec 2025 |
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| Pinney & Scofield | 3.7k | $4.0k | 0% | Dec 2025 |
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| Archer Investment Corp | 2.0k | $2.2k | 0% | Dec 2025 |
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| Signature Resources Capital Management | 1.0k | $1.1k | 100% | Dec 2025 |
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| Sound Income Strategies | 1.0k | $1.3k | 100% | Dec 2025 |
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| Optiver Holding B.V. | 927.00 | $1.0k | -17% | Dec 2025 |
|
| TD Waterhouse Canada | 800.00 | $872.000000 | 0% | Dec 2025 |
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| NISA Investment Advisors | 608.00 | $668.982400 | 0% | Dec 2025 |
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| Hanson McClain Advisors | 436.00 | $479.992400 | -49% | Dec 2025 |
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| EverSource Wealth Advisors | 427.00 | $469.998900 | 0% | Dec 2025 |
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| FSA Wealth Management | 100.00 | $141.000000 | 0% | Sep 2025 |
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| Rothschild Investment | 70.00 | $77.000000 | 100% | Dec 2025 |
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| Capital Advisors | 58.00 | $0 | 0% | Dec 2025 |
|
| Federation des caisses Desjardins du Quebec | 50.00 | $55.000000 | 0% | Dec 2025 |
|
| SageView Advisory Group | 17.00 | $18.999200 | 100% | Dec 2025 |
|
Who sold out of Quantum Si?
| Fund or Company Name | Date Sold | Shares Held | Valued At |
|---|---|---|---|
| Squarepoint Ops | Sep 2025 | 614k | $865k |
| IMC-Chicago | Sep 2025 | 185k | $261k |
| Pathstone Holdings | Sep 2025 | 184k | $259k |
| Shay Capital | Sep 2025 | 155k | $218k |
| Engineers Gate Manager | Sep 2025 | 42k | $58k |
| Mercer Global Advisors | Sep 2025 | 27k | $38k |
| Elite Life Management | Sep 2025 | 21k | $54k |
| DLK Investment Management | Sep 2025 | 20k | $28k |
| Jump Financial | Sep 2025 | 15k | $21k |
| CIBC World Markets | Sep 2025 | 14k | $20k |
| Prudential Financial | Sep 2025 | 13k | $18k |
| Principal Financial Group | Sep 2025 | 11k | $16k |
| Mark Sheptoff Financial Planning | Sep 2025 | 11k | $15k |
| TriaGen Wealth Management | Sep 2025 | 10k | $14k |
| Principal Securities | Sep 2025 | 6.6k | $9.4k |
| Summit Wealth Group Llc / Co | Sep 2025 | 2.3k | $225k |
| Bangor Savings Bank | Sep 2025 | 400.00 | $564.000000 |
| Union Bankshares | Sep 2025 | 251.00 | $354.010400 |
| SRS Capital Advisors | Sep 2025 | 104.00 | $145.995200 |