| 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 |
| Nikko Asset Management Americas, Inc. | 4.8% | $7,217,902 | 5,965,208 | Nikko Asset Management Americas, Inc. | 31 Dec 2024 | |||
| Sumitomo Mitsui Trust Group, Inc. | 4.8% | $7,217,902 | 5,965,208 | Sumitomo Mitsui Trust Group, Inc. | 31 Dec 2024 |
As of 31 Dec 2025, 129 institutional investors reported holding 67,113,757 shares of Quantum-Si Inc - Common Stock (QSI). This represents 37% of the company’s total 182,694,067 outstanding shares.
The largest institutional shareholders of Quantum-Si Inc - Common Stock (QSI) together control 34% 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. | 7.1% | 13,054,057 | +15% | 0% | $14,359,463 |
| VANGUARD GROUP INC | 5.3% | 9,607,022 | +10% | 0% | $10,567,724 |
| ARK Investment Management LLC | 3.8% | 7,021,571 | -7.9% | 0.05% | $7,723,728 |
| Amova Asset Management Americas, Inc. | 2.6% | 4,690,720 | -10% | 0.06% | $5,112,885 |
| Sumitomo Mitsui Trust Group, Inc. | 2.6% | 4,690,720 | -10% | 0% | $5,159,792 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.3% | 4,114,375 | +9.8% | 0% | $4,526,616 |
| STATE STREET CORP | 2% | 3,562,721 | +26% | 0% | $3,918,993 |
| CITADEL ADVISORS LLC | 1.5% | 2,676,097 | +557% | 0% | $2,943,707 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1.3% | 2,327,785 | +14% | 0% | $2,560,564 |
| NORTHERN TRUST CORP | 1.2% | 2,207,936 | -5% | 0% | $2,428,730 |
| UBS Group AG | 0.79% | 1,449,512 | +187% | 0% | $1,594,464 |
| TWO SIGMA INVESTMENTS, LP | 0.76% | 1,384,181 | +168% | 0% | $1,522,599 |
| JANE STREET GROUP, LLC | 0.6% | 1,104,033 | -31% | 0% | $1,214,436 |
| Fosun International Ltd | 0.41% | 743,935 | 0% | 0.21% | $818,329 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.26% | 468,174 | +0.02% | 0% | $514,991 |
| XTX Topco Ltd | 0.25% | 461,982 | +207% | 0.01% | $508,180 |
| Nuveen, LLC | 0.24% | 447,519 | 0% | 0% | $492,271 |
| Bank of New York Mellon Corp | 0.22% | 406,291 | +2.9% | 0% | $446,920 |
| Invesco Ltd. | 0.22% | 402,821 | +36% | 0% | $443,103 |
| MORGAN STANLEY | 0.22% | 399,994 | +48% | 0% | $439,994 |
| GOLDMAN SACHS GROUP INC | 0.21% | 386,824 | -0.08% | 0% | $425,507 |
| Knollwood Investment Advisory, LLC | 0.16% | 300,000 | 0% | 0.03% | $330,000 |
| Quadrature Capital Ltd | 0.15% | 276,889 | 0% | $304,578 | |
| ALLIANCEBERNSTEIN L.P. | 0.15% | 272,180 | 0% | 0% | $299,398 |
| BARCLAYS PLC | 0.15% | 269,415 | +22% | 0% | $296,357 |
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2025 Q4 | 67,113,757 | $73,779,343 | +$2,395,519 | $1.10 | 129 |
| 2025 Q3 | 64,444,810 | $90,874,495 | -$423,140 | $1.41 | 120 |
| 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 |