QSINasdaqMeasuring & Controlling Devices, NECFiscal year ends December 31
Quantum-Si Inc
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Aug 13, 2026
$1.09−0.03 (-2.68%)
Close on Oct 19, 2026
- Market cap
- $237.40M
- P/E (TTM)
- –
- Dividend yield
- –
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
24.2%
53M of 219M shares
Institutional holders
141
27 new, 41 sold out
Net institutional buying
-10M
In Q2 2026
Insider trades, 12 months
2 buys · 30 sales
Net bought $69.65K
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| Rothberg Jonathan M | 19,937,500 | 100.00% | 13D (active) amendment | Dec 27, 2024 |
| Rothberg Jonathan M. | 19,937,500 | 100.00% | 13D (active) amendment | Aug 26, 2026 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of QSI | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| Vanguard Capital Management LLC | 7,578,208 | 3.46% | $6.71M | +556,301 | 0.00% |
| ARK Investment Management LLC | 7,167,738 | 3.27% | $6.34M | +288,839 | 0.04% |
| BlackRock, Inc. | 5,225,352 | 2.39% | $4.62M | −8,189,597 | 0.00% |
| Sumitomo Mitsui Trust Holdings, Inc. | 3,885,230 | 1.78% | $3.44M | −506,436 | 0.00% |
| Nikko Asset Management Americas, Inc. | 3,885,230 | 1.78% | $3.46M | −506,436 | 0.04% |
| Millennium Management LLC | 3,131,726 | 1.43% | $2.77M | New | 0.00% |
| UBS Group AG | 2,561,897 | 1.17% | $2.27M | +859,370 | 0.00% |
| Aqr Capital Management LLC | 2,348,665 | 1.07% | $2.08M | −43,514 | 0.00% |
| Geode Capital Management, LLC | 2,236,526 | 1.02% | $1.98M | −1,598,595 | 0.00% |
| Jane Street Group, LLC | 2,142,735 | 0.98% | $1.90M | New | 0.00% |
| Susquehanna International Group, Llp | 1,116,750 | 0.51% | $988.32K | −347,818 | 0.00% |
| Vanguard Fiduciary Trust Co | 1,116,683 | 0.51% | $988.26K | −569 | 0.00% |
| State Street Corp | 890,741 | 0.41% | $788.31K | −2,879,948 | 0.00% |
| Fosun International Ltd | 743,935 | 0.34% | $658.38K | – | 0.15% |
| Renaissance Technologies LLC | 553,871 | 0.25% | $490.18K | +435,971 | 0.00% |
| Vanguard Portfolio Management LLC | 497,098 | 0.23% | $439.93K | −1,023,548 | 0.00% |
| Goldman Sachs Group Inc | 476,288 | 0.22% | $421.52K | +32,111 | 0.00% |
| Northern Trust Corp | 450,531 | 0.21% | $398.72K | −810,170 | 0.00% |
| Invesco Ltd. | 443,929 | 0.20% | $392.88K | +37,239 | 0.00% |
| Bnp Paribas Arbitrage, Snc | 398,598 | 0.18% | $352.76K | +360,208 | 0.00% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 141 | 53M | 24.2% | 27 / 36 | 57 / 41 | 10M | 20M |
| Q1 2026 | 157 | 63M | 28.8% | 45 / 39 | 37 / 21 | 15M | 10M |
| Q4 2025 | 135 | 67M | 30.8% | 32 / 36 | 39 / 19 | 10M | 7M |
| Q3 2025 | 125 | 65M | 29.6% | 14 / 43 | 40 / 22 | 6M | 6M |
| Q2 2025 | 135 | 65M | 29.6% | 15 / 55 | 36 / 16 | 11M | 3M |
| Q1 2025 | 137 | 58M | 26.4% | 39 / 42 | 34 / 22 | 10M | 6M |
| Q4 2024 | 121 | 54M | 24.5% | 35 / 42 | 22 / 20 | 10M | 9M |
| Q3 2024 | 107 | 52M | 23.8% | 20 / 24 | 33 / 11 | 8M | 3M |
| Q2 2024 | 99 | 54M | 24.5% | 16 / 30 | 29 / 11 | 3M | 2M |
| Q1 2024 | 95 | 53M | 24.4% | 13 / 20 | 38 / 9 | 2M | 5M |
| Q4 2023 | 91 | 57M | 26.0% | 10 / 29 | 26 / 13 | 3M | 1M |
| Q3 2023 | 96 | 55M | 24.9% | 20 / 32 | 16 / 15 | 17M | 6M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
| Fund | Shares | % of QSI | Value | % of fund | As of |
|---|---|---|---|---|---|
| ARK Genomic Revolution ETF | 6,760,803 | 3.09% | $4.82M | 0.31% | Jul 31, 2026 |
| Vanguard Total Stock Market Index Fund | 5,353,930 | 2.45% | $4.74M | 0.00% | Jun 30, 2026 |
| Vanguard Extended Market Index Fund | 1,988,263 | 0.91% | $1.76M | 0.00% | Jun 30, 2026 |
| iShares Biotechnology ETF | 1,197,863 | 0.55% | $1.06M | 0.01% | Jun 30, 2026 |
| Fidelity Extended Market Index Fund | 907,406 | 0.41% | $1.08M | 0.00% | May 31, 2026 |
| Vanguard Russell 2000 Index Fund | 862,344 | 0.39% | $1.03M | 0.01% | May 31, 2026 |
| Vanguard Health Care Index Fund | 539,508 | 0.25% | $642.01K | 0.00% | May 31, 2026 |
| iShares Core S&P Total U.S. Stock Market ETF | 431,096 | 0.20% | $381.52K | 0.00% | Jun 30, 2026 |
| Invesco RAFI US 1500 Small-Mid ETF | 425,347 | 0.19% | $303.02K | 0.01% | Jul 31, 2026 |
| Fidelity Total Market Index Fund | 328,187 | 0.15% | $390.54K | 0.00% | May 31, 2026 |
| Fidelity Series Total Market Index Fund | 270,587 | 0.12% | $322.00K | 0.00% | May 31, 2026 |
| Ultra-Small Company Market Fund | 200,000 | 0.09% | $177.00K | 0.12% | Jun 30, 2026 |
| Vanguard Russell 2000 Value Index Fund | 132,626 | 0.06% | $157.82K | 0.01% | May 31, 2026 |
| Fidelity Nasdaq Composite Index Fund | 111,123 | 0.05% | $132.24K | 0.00% | May 31, 2026 |
| Fidelity ZERO Total Market Index Fund | 106,167 | 0.05% | $75.63K | 0.00% | Jul 31, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| Jeffrey Alan Hawkins | President & CEO, Director | 3,639,950 | 1.66% | Sep 23, 2026 |
| Jeffry R. Keyes | Chief Financial Officer | 1,716,684 | 0.78% | Sep 23, 2026 |
| Christian LaPointe | GC & Corp. Secretary | 1,167,913 | 0.53% | Sep 23, 2026 |
| John S. Vieceli | Chief Product Officer | 1,140,434 | 0.52% | Jun 24, 2026 |
| Todd C. Bennett | Chief Commercial Officer | 681,521 | 0.31% | Sep 24, 2025 |
| Kevin Rakin | Director | 1,220,512 | 0.56% | May 20, 2026 |
| Brigid Makes | Director | 20,512 | 0.01% | May 20, 2026 |
| Amir Jafri | Director | 115,942 | 0.05% | May 20, 2026 |
| Paula Dowdy | Director | 269,107 | 0.12% | May 20, 2026 |
| Charles R. Kummeth | Director | 855,000 | 0.39% | May 20, 2026 |
| John P. Kenny | Director | 114,285 | 0.05% | May 20, 2026 |
| Scott Mendel | Director | 141,843 | 0.06% | May 20, 2026 |
| Ruth A. Fattori | Director | 170,512 | 0.08% | May 20, 2026 |
| Jonathan M. Rothberg | Director, 10% owner | 33,644,178 | 15.37% | May 20, 2026 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| Jeffry R. Keyes Chief Financial Officer | Sep 22, 2026 | Sale | −2,493 | $0.76 | $1.89K | 1,716,684 |
| Jeffrey Alan Hawkins President & CEO, Director | Sep 22, 2026 | Sale | −9,709 | $0.76 | $7.38K | 3,639,950 |
| Christian LaPointe GC & Corp. Secretary | Sep 22, 2026 | Sale | −4,721 | $0.76 | $3.59K | 1,167,913 |
| Jeffry R. Keyes Chief Financial Officer | Sep 21, 2026 | Sale | −5,172 | $0.76 | $3.93K | 1,719,177 |
| Jeffrey Alan Hawkins President & CEO, Director | Sep 21, 2026 | Sale | −20,143 | $0.76 | $15.31K | 3,649,659 |
| Christian LaPointe GC & Corp. Secretary | Sep 21, 2026 | Sale | −9,795 | $0.76 | $7.44K | 1,172,634 |
| Jeffry R. Keyes Chief Financial Officer | Jun 23, 2026 | Sale | −4,117 | $0.90 | $3.71K | 1,724,349 |
| Christian LaPointe GC & Corp. Secretary | Jun 23, 2026 | Sale | −7,794 | $0.90 | $7.01K | 1,182,429 |
| Jeffrey Alan Hawkins President & CEO, Director | Jun 23, 2026 | Sale | −11,311 | $0.90 | $10.18K | 3,669,802 |
| John S. Vieceli Chief Product Officer | Jun 23, 2026 | Sale | −15,112 | $0.90 | $13.60K | 1,140,434 |
| Jeffry R. Keyes Chief Financial Officer | Jun 22, 2026 | Sale | −4,116 | $0.96 | $3.95K | 1,728,466 |
| Christian LaPointe GC & Corp. Secretary | Jun 22, 2026 | Sale | −7,794 | $0.96 | $7.48K | 1,190,223 |
| Jeffrey Alan Hawkins President & CEO, Director | Jun 22, 2026 | Sale | −11,310 | $0.96 | $10.86K | 3,681,113 |
| John S. Vieceli Chief Product Officer | Jun 22, 2026 | Sale | −15,111 | $0.96 | $14.51K | 1,155,546 |
| Jeffry R. Keyes Chief Financial Officer | Apr 21, 2026 | Sale | −37,381 | $1.00 | $37.38K | 1,732,582 |
| Jeffrey Alan Hawkins President & CEO, Director | Apr 21, 2026 | Sale | −83,712 | $1.00 | $83.71K | 3,692,423 |
| Jeffry R. Keyes Chief Financial Officer | Apr 20, 2026 | Sale | −37,382 | $1.01 | $37.76K | 1,769,963 |
| Jeffrey Alan Hawkins President & CEO, Director | Apr 20, 2026 | Sale | −83,712 | $1.01 | $84.55K | 3,776,135 |
| Jeffrey Alan Hawkins President & CEO, Director | Mar 23, 2026 | Sale | −12,149 | $0.83 | $10.08K | 3,859,847 |
| John S. Vieceli Chief Product Officer | Mar 23, 2026 | Sale | −11,239 | $0.83 | $9.33K | 1,170,657 |
| Jeffry R. Keyes Chief Financial Officer | Mar 23, 2026 | Sale | −4,422 | $0.83 | $3.67K | 1,807,345 |
| Christian LaPointe GC & Corp. Secretary | Mar 23, 2026 | Sale | −6,110 | $0.83 | $5.07K | 1,198,017 |
| Jeffrey Alan Hawkins President & CEO, Director | Mar 20, 2026 | Sale | −11,628 | $0.85 | $9.88K | 3,871,996 |
| John S. Vieceli Chief Product Officer | Mar 20, 2026 | Sale | −10,758 | $0.85 | $9.14K | 1,181,896 |
| Jeffry R. Keyes Chief Financial Officer | Mar 20, 2026 | Sale | −4,233 | $0.85 | $3.60K | 1,811,767 |
| Christian LaPointe GC & Corp. Secretary | Mar 20, 2026 | Sale | −5,849 | $0.85 | $4.97K | 1,204,127 |
| Jeffry R. Keyes Chief Financial Officer | Mar 12, 2026 | Award | +652,803 | – | – | 1,816,000 |
| Jeffrey Alan Hawkins President & CEO, Director | Mar 12, 2026 | Award | +1,305,606 | – | – | 3,883,624 |
| John S. Vieceli Chief Product Officer | Mar 12, 2026 | Award | +391,681 | – | – | 1,192,654 |
| Christian LaPointe GC & Corp. Secretary | Mar 12, 2026 | Award | +261,121 | – | – | 1,209,976 |
| Charles R. Kummeth Director | Mar 5, 2026 | Buy | +500,000 | $0.92 | $460.00K | 855,000 |
| Paula Dowdy Director | Mar 5, 2026 | Buy | +109,890 | $0.95 | $104.40K | 269,107 |
| Jeffry R. Keyes Chief Financial Officer | Dec 22, 2025 | Sale | −8,627 | $1.28 | $11.04K | 1,163,197 |
| John S. Vieceli Chief Product Officer | Dec 22, 2025 | Sale | −21,927 | $1.28 | $28.07K | 800,973 |
| Jeffrey Alan Hawkins President & CEO, Director | Dec 22, 2025 | Sale | −23,707 | $1.28 | $30.34K | 2,578,018 |
| Christian LaPointe GC & Corp. Secretary | Dec 22, 2025 | Sale | −11,951 | $1.28 | $15.30K | 948,855 |
| Jonathan M. Rothberg Director, 10% owner | Oct 16, 2025 | Sale(10b5-1 plan) | −26,095 | $3.07 | $80.11K | 1,904,866 |
| Christian LaPointe GC & Corp. Secretary | Sep 23, 2025 | Sale | −5,364 | $1.64 | $8.80K | 960,806 |
| Todd C. Bennett Chief Commercial Officer | Sep 23, 2025 | Sale | −18,482 | $1.64 | $30.31K | 681,521 |
| Jeffry R. Keyes Chief Financial Officer | Sep 23, 2025 | Sale | −3,873 | $1.64 | $6.35K | 1,171,824 |
| Jeffrey Alan Hawkins President & CEO, Director | Sep 23, 2025 | Sale | −10,643 | $1.64 | $17.45K | 2,601,725 |
| John S. Vieceli Chief Product Officer | Sep 23, 2025 | Sale | −9,843 | $1.64 | $16.14K | 822,900 |
| Christian LaPointe GC & Corp. Secretary | Sep 22, 2025 | Sale | −5,364 | $1.68 | $9.01K | 966,170 |
| Todd C. Bennett Chief Commercial Officer | Sep 22, 2025 | Sale | −18,482 | $1.68 | $31.05K | 700,003 |
| Jeffry R. Keyes Chief Financial Officer | Sep 22, 2025 | Sale | −3,873 | $1.68 | $6.51K | 1,175,697 |
| Jeffrey Alan Hawkins President & CEO, Director | Sep 22, 2025 | Sale | −10,643 | $1.68 | $17.88K | 2,612,368 |
| John S. Vieceli Chief Product Officer | Sep 22, 2025 | Sale | −9,843 | $1.68 | $16.54K | 832,743 |
| Jeffrey Alan Hawkins President & CEO, Director | Jun 23, 2025 | Sale | −23,705 | $1.61 | $38.17K | 2,623,011 |
| Jeffry R. Keyes Chief Financial Officer | Jun 23, 2025 | Sale | −8,624 | $1.61 | $13.88K | 1,179,570 |
| Christian LaPointe GC & Corp. Secretary | Jun 23, 2025 | Sale | −11,946 | $1.61 | $19.23K | 971,534 |
| John S. Vieceli Chief Product Officer | Jun 23, 2025 | Sale | −21,923 | $1.61 | $35.30K | 842,586 |
| Jeffry R. Keyes Chief Financial Officer | Mar 21, 2025 | Sale | −8,626 | $1.39 | $11.99K | 1,188,194 |
| John S. Vieceli Chief Product Officer | Mar 21, 2025 | Sale | −4,317 | $1.39 | $6.00K | 864,509 |
| Christian LaPointe General Counsel & Corp. Secr. | Mar 21, 2025 | Sale | −4,896 | $1.39 | $6.81K | 983,480 |
| Jeffrey Alan Hawkins President & CEO, Director | Mar 21, 2025 | Sale | −23,707 | $1.39 | $32.95K | 2,646,716 |
| Jeffrey Alan Hawkins President & CEO, Director | Mar 12, 2025 | Award | +1,666,666 | – | – | 2,670,423 |
| Todd C. Bennett Chief Commercial Officer | Mar 12, 2025 | Award | +208,333 | – | – | 718,485 |
| Jeffry R. Keyes Chief Financial Officer | Mar 12, 2025 | Award | +750,000 | – | – | 1,196,820 |
| Christian LaPointe General Counsel & Corp. Secr. | Mar 12, 2025 | Award | +416,666 | – | – | 988,376 |
| John S. Vieceli Chief Product Officer | Mar 12, 2025 | Award | +708,333 | – | – | 868,826 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.
Planned insider sales
Notices of proposed sale filed on Form 144 before shares are sold
| Seller | Filed | Shares | Market value | Planned sale | Acquired through |
|---|---|---|---|---|---|
| Christian LaPointe Officer | Sep 23, 2026 | 14,516 | $10.99K | Sep 21, 2026 | Restricted Stock Unit Vesting |
| Jeffrey Alan Hawkins Officer, Director | Sep 23, 2026 | 29,852 | $22.61K | Sep 21, 2026 | Restricted Stock Unit Vesting |
| Jeffry R. Keyes Officer | Sep 23, 2026 | 7,665 | $5.81K | Sep 21, 2026 | Restricted Stock Unit Vesting |
| Christian LaPointe Officer | Jun 24, 2026 | 15,588 | $14.47K | Jun 22, 2026 | Restricted Stock Unit Vesting |
| Jeffry R. Keyes Officer | Jun 24, 2026 | 8,233 | $7.64K | Jun 22, 2026 | Restricted Stock Unit Vesting |
| John S. Vieceli Officer | Jun 24, 2026 | 30,223 | $28.05K | Jun 22, 2026 | Restricted Stock Unit Vesting |
| Jeffrey Alan Hawkins Officer, Director | Jun 24, 2026 | 22,621 | $21.00K | Jun 22, 2026 | Restricted Stock Unit Vesting |
| Jeffrey Alan Hawkins Officer, Director | Apr 22, 2026 | 167,424 | $167.51K | Apr 20, 2026 | Restricted Stock Unit Vesting |
| Jeffry R. Keyes Officer | Apr 22, 2026 | 74,763 | $74.80K | Apr 20, 2026 | Restricted Stock Unit Vesting |
| Jeffry R. Keyes Officer | Mar 24, 2026 | 8,655 | $7.25K | Mar 20, 2026 | Restricted Stock Unit Vesting |
| John S. Vieceli Officer | Mar 24, 2026 | 21,997 | $18.42K | Mar 20, 2026 | Restricted Stock Unit Vesting |
| Jeffrey Alan Hawkins Officer, Director | Mar 24, 2026 | 23,777 | $19.91K | Mar 20, 2026 | Restricted Stock Unit Vesting |
| Christian LaPointe Officer | Mar 24, 2026 | 11,959 | $10.01K | Mar 20, 2026 | Restricted Stock Unit Vesting |
| John S. Vieceli Officer | Dec 22, 2025 | 21,927 | $27.98K | Dec 22, 2025 | Restricted Stock Unit Vesting |
| Jeffrey Alan Hawkins Officer, Director | Dec 22, 2025 | 23,707 | $30.25K | Dec 22, 2025 | Restricted Stock Unit Vesting |