Quantum-Si
Ownership
Ownership Structure
Who owns Quantum-Si (QSI)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 96.6% of the shares are freely tradable; institutional investors hold 24.8%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 6.13 | 13,414,949 | +2.8 | 03/31/2026 |
| Vanguard Capital Management, LLC | 3.21 | 7,021,907 | +0.0 | 03/31/2026 |
| ARK Investment Management LLC | 3.14 | 6,878,899 | -2.0 | 03/31/2026 |
| Amova Asset Management Americas, Inc | 1.78 | 3,885,230 | -11.5 | 06/30/2026 |
| Sumitomo Mitsui Trust Group Inc | 1.78 | 3,885,230 | -11.5 | 06/30/2026 |
| Geode Capital Management, LLC | 1.75 | 3,835,121 | -6.8 | 03/31/2026 |
| State Street Corp | 1.72 | 3,770,689 | +5.8 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| ARK Genomic Revolution ETF | 3.27 | 7,162,899 | -0.3 | 08/31/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 2.45 | 5,353,930 | +0.0 | 08/31/2026 |
| Amova ARK Pstv Chg Innovt P JPY Acc | 1.46 | 3,198,942 | +0.0 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Hawkins Jeffrey Alan | President & CEO | 3,639,950 | 5,823,920 $ | Sep 22, 2026 | direct |
| Keyes Jeffry R. | Chief Financial Officer | 1,716,684 | 2,746,694 $ | Sep 22, 2026 | direct |
| LaPointe Christian | GC & Corp. Secretary | 1,167,913 | 1,868,661 $ | Sep 22, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 22, 2026 | Hawkins Jeffrey Alan | President & CEO | Sell | 9,709 | 0.7608 | 7,387 |
| Sep 22, 2026 | Keyes Jeffry R. | Chief Financial Officer | Sell | 2,493 | 0.7608 | 1,897 |
| Sep 22, 2026 | LaPointe Christian | GC & Corp. Secretary | Sell | 4,721 | 0.7608 | 3,592 |
| Sep 21, 2026 | Hawkins Jeffrey Alan | President & CEO | Sell | 20,143 | 0.7558 | 15,224 |
| Sep 21, 2026 | Keyes Jeffry R. | Chief Financial Officer | Sell | 5,172 | 0.7558 | 3,909 |
| Sep 21, 2026 | LaPointe Christian | GC & Corp. Secretary | Sell | 9,795 | 0.7558 | 7,403 |
| Apr 21, 2026 | Jeffry R Keyes | CFO | Sell | 37,381 | 0.99 | 37,007 |
| Apr 20, 2026 | Jeffrey Alan Hawkins | CEO | Sell | 83,712 | 1.01 | 84,549 |
| Apr 20, 2026 | Jeffry R Keyes | CFO | Sell | 37,382 | 1.01 | 37,756 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: October 2, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.