| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| ROTHBERG JONATHAN M | 100% | 0% | $23,326,875 | 19,937,500 | 0% | ROTHBERG JONATHAN M. | 09 Sep 2025 | |
| VANGUARD GROUP INC | 4.8% | -11% | $12,287,455 | +$63,233 | 8,714,507 | +0.52% | The Vanguard Group | 30 Sep 2025 |
| ARK Investment Management LLC | 4.8% | -11% | $11,792,099 | -$1,365,288 | 7,809,337 | -10% | ARK Investment Management LLC | 31 May 2025 |
| Sumitomo Mitsui Trust Group, Inc. | 4.8% | $7,217,902 | 5,965,208 | Sumitomo Mitsui Trust Group, Inc. | 31 Dec 2024 | |||
| Nikko Asset Management Americas, Inc. | 4.8% | $7,217,902 | 5,965,208 | Nikko Asset Management Americas, Inc. | 31 Dec 2024 |
As of 30 Sep 2025, 119 institutional investors reported holding 64,419,810 shares of Quantum-Si Inc - Common Stock (QSI). This represents 35% of the company’s total 182,694,067 outstanding shares.
The largest institutional shareholders of Quantum-Si Inc - Common Stock (QSI) together control 33% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 6.2% | 11,321,673 | +4.4% | 0% | $15,963,559 |
| VANGUARD GROUP INC | 4.8% | 8,714,507 | +0.52% | 0% | $12,287,455 |
| ARK Investment Management LLC | 4.2% | 7,624,042 | -4.2% | 0.06% | $10,749,899 |
| Amova Asset Management Americas, Inc. | 2.9% | 5,217,499 | -7.2% | 0.07% | $7,356,674 |
| Sumitomo Mitsui Trust Group, Inc. | 2.9% | 5,217,499 | -7.2% | 0% | $7,356,674 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.1% | 3,747,169 | +8.7% | 0% | $5,284,591 |
| STATE STREET CORP | 1.5% | 2,817,490 | +2.2% | 0% | $3,972,661 |
| MILLENNIUM MANAGEMENT LLC | 1.5% | 2,669,959 | -29% | 0% | $3,764,642 |
| NORTHERN TRUST CORP | 1.3% | 2,323,042 | +1.5% | 0% | $3,275,489 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1.1% | 2,041,095 | +107% | 0% | $2,877,944 |
| JANE STREET GROUP, LLC | 0.88% | 1,610,023 | +465% | 0% | $2,270,133 |
| Fosun International Ltd | 0.41% | 743,935 | 0% | 0.39% | $1,048,948 |
| Squarepoint Ops LLC | 0.34% | 613,475 | 0% | $865,000 | |
| ROYAL BANK OF CANADA | 0.29% | 532,293 | +16% | 0% | $750,000 |
| TWO SIGMA INVESTMENTS, LP | 0.28% | 515,852 | -8.6% | 0% | $727,351 |
| UBS Group AG | 0.28% | 504,859 | -36% | 0% | $711,851 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.26% | 468,088 | +8.5% | 0% | $660,004 |
| Nuveen, LLC | 0.24% | 447,519 | -60% | 0% | $631,002 |
| CITADEL ADVISORS LLC | 0.22% | 407,047 | -27% | 0% | $573,936 |
| Bank of New York Mellon Corp | 0.22% | 394,905 | +12% | 0% | $556,815 |
| GOLDMAN SACHS GROUP INC | 0.21% | 387,151 | -57% | 0% | $545,883 |
| GROUP ONE TRADING LLC | 0.21% | 377,774 | +181% | 0.02% | $532,661 |
| BANK OF AMERICA CORP /DE/ | 0.19% | 348,007 | -25% | 0% | $490,691 |
| Knollwood Investment Advisory, LLC | 0.16% | 300,000 | 0% | 0.04% | $423,000 |
| Invesco Ltd. | 0.16% | 295,728 | +51% | 0% | $416,976 |
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2025 Q4 | 174,890 | $192,133 | -$206,851 | $1.10 | 12 |
| 2025 Q3 | 64,419,810 | $90,839,245 | -$423,140 | $1.41 | 119 |
| 2025 Q2 | 64,302,080 | $126,030,953 | +$13,332,090 | $1.96 | 131 |
| 2025 Q1 | 57,702,101 | $69,187,968 | +$4,278,851 | $1.20 | 132 |
| 2024 Q4 | 53,650,133 | $144,828,921 | +$7,467,683 | $2.70 | 119 |
| 2024 Q3 | 52,018,403 | $45,873,394 | -$1,304,094 | $0.88 | 106 |
| 2024 Q2 | 53,534,496 | $56,052,952 | +$296,093 | $1.05 | 97 |
| 2024 Q1 | 52,939,609 | $104,094,301 | -$7,060,197 | $1.97 | 93 |
| 2023 Q4 | 56,545,513 | $113,571,460 | +$3,979,280 | $2.01 | 88 |
| 2023 Q3 | 54,518,149 | $90,500,891 | +$17,074,897 | $1.66 | 94 |
| 2023 Q2 | 43,838,780 | $78,455,574 | +$764,050 | $1.79 | 88 |
| 2023 Q1 | 43,470,316 | $76,438,490 | -$11,104,148 | $1.76 | 95 |
| 2022 Q4 | 50,563,530 | $92,475,906 | +$3,565,426 | $1.83 | 98 |
| 2022 Q3 | 47,618,704 | $130,884,473 | -$2,677,367 | $2.75 | 96 |
| 2022 Q2 | 48,637,778 | $139,588,569 | +$2,799,359 | $2.32 | 93 |
| 2022 Q1 | 45,913,518 | $214,907,059 | -$18,856,558 | $4.68 | 86 |
| 2021 Q4 | 47,044,785 | $370,416,832 | +$7,975,560 | $7.87 | 91 |
| 2021 Q3 | 44,603,838 | $372,106,029 | -$32,106,463 | $8.34 | 70 |
| 2021 Q2 | 44,270,353 | $533,450,402 | +$533,145,402 | $12.26 | 70 |