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Quantum-Si-A (QSI)
NASDAQ
$1.19-$0.05 (-4.03%)
Price as of Jun 03, 2026 6:48 PM EDT- $235.4MMarket Cap
- -29.55%1-Year Change
- Medical DevicesIndustry
Quantum-Si-A (QSI)
$1.19-$0.05 (-4.03%)
Top Holders
Institutional
Mutual Funds
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
BLACKROCK, INC. | 6.78% | 13.4M | +360,892 (+2.69%) | Mar 31, 2026 |
VANGUARD GROUP INC | 4.86% | 9.6M | +892,515 (+9.29%) | Dec 31, 2025 |
BLACKROCK FUNDING, INC. /DE | 4.27% | 8.4M | +1.5M (+18.22%) | Dec 31, 2024 |
N/A | 3.55% | 7.0M | +7.0M (+100.00%) | Mar 31, 2026 |
BLACKROCK INC. | 3.54% | 7.0M | -231,111 (-3.30%) | Jun 30, 2024 |
ARK INVESTMENT MANAGEMENT LLC | 3.48% | 6.9M | -142,672 (-2.07%) | Mar 31, 2026 |
NIKKO ASSET MANAGEMENT AMERICAS, INC. | 2.22% | 4.4M | -299,054 (-6.81%) | Mar 31, 2026 |
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
iSHARES TRUST | 3.93% | 7.8M | +294,960 (+3.79%) | Mar 31, 2026 |
Ark ETF Trust | 3.54% | 7.0M | -41,885 (-0.60%) | Jan 30, 2026 |
VANGUARD INDEX FUNDS | 3.47% | 6.9M | 0 (0.00%) | Mar 31, 2026 |
SMALLCAP WORLD FUND INC | 1.26% | 2.5M | 0 (0.00%) | Mar 31, 2026 |
FIDELITY CONCORD STREET TRUST | 0.61% | 1.2M | -360,623 (-29.81%) | Feb 28, 2026 |
VANGUARD WELLINGTON FUND | 0.52% | 1.0M | 0 (0.00%) | Feb 28, 2026 |
VANGUARD SCOTTSDALE FUNDS | 0.46% | 905,839 | +22,959 (+2.53%) | Feb 28, 2026 |
Current Ownership Distribution
- Institutions975.8M (72.80%)
- Mutual Funds314.8M (23.48%)
- Insiders49.9M (3.72%)
- Other0 (0.00%)
Insider Transactions
- 3.72% (49.9M)Current InsiderOwnership (%, shares)
- 2Number of InsiderBuying (last 12 months)
- $477,793.76Amount of InsiderBuying (last 12 months)
- 5Number of InsiderSelling (last 12 months)
- $43.5MAmount of InsiderSelling (last 12 months)
Insider Name & Title | Type | Date
| Transaction Value | Shares | Share Price | Shares After Transactions |
|---|---|---|---|---|---|---|
LaPointe Christian GC & Corp. Secretary | Sell | Mar 23, 2026 | $5,050.53 | 6,110 | $0.83 | 1.2M |
Vieceli John S. Chief Product Officer | Sell | Mar 23, 2026 | $9,290.16 | 11,239 | $0.83 | 1.2M |
Keyes Jeffry R. Chief Financial Officer | Sell | Mar 23, 2026 | $3,655.23 | 4,422 | $0.83 | 1.8M |
Hawkins Jeffrey Alan President & CEO | Sell | Mar 23, 2026 | $10,042.36 | 12,149 | $0.83 | 3.9M |
LaPointe Christian GC & Corp. Secretary | Sell | Mar 20, 2026 | $4,961.71 | 5,849 | $0.85 | 1.2M |
Vieceli John S. Chief Product Officer | Sell | Mar 20, 2026 | $9,126.01 | 10,758 | $0.85 | 1.2M |
Keyes Jeffry R. Chief Financial Officer | Sell | Mar 20, 2026 | $3,590.85 | 4,233 | $0.85 | 1.8M |
Hawkins Jeffrey Alan President & CEO | Sell | Mar 20, 2026 | $9,864.03 | 11,628 | $0.85 | 3.9M |
Vieceli John S. Chief Product Officer | Award | Mar 12, 2026 | $0.00 | 468,508 | $0.00 | 468,508 |
LaPointe Christian GC & Corp. Secretary | Award | Mar 12, 2026 | $0.00 | 312,339 | $0.00 | 312,339 |
Vieceli John S. Chief Product Officer | Award | Mar 12, 2026 | $0.00 | 391,681 | $0.00 | 1.2M |
Hawkins Jeffrey Alan President & CEO | Award | Mar 12, 2026 | $0.00 | 1.6M | $0.00 | 1.6M |
LaPointe Christian GC & Corp. Secretary | Award | Mar 12, 2026 | $0.00 | 261,121 | $0.00 | 1.2M |
Hawkins Jeffrey Alan President & CEO | Award | Mar 12, 2026 | $0.00 | 1.3M | $0.00 | 3.9M |
Keyes Jeffry R. Chief Financial Officer | Award | Mar 12, 2026 | $0.00 | 780,847 | $0.00 | 780,847 |
Keyes Jeffry R. Chief Financial Officer | Award | Mar 12, 2026 | $0.00 | 652,803 | $0.00 | 1.8M |
Kummeth Charles R. | Buy | Mar 05, 2026 | $459,800.00 | 500,000 | $0.92 | 855,000 |
Dowdy Paula | Buy | Mar 05, 2026 | $104,450.45 | 109,890 | $0.95 | 269,107 |
Jafri Amir | Award | Feb 24, 2026 | $0.00 | 114,055 | $0.00 | 114,055 |
LaPointe Christian GC & Corp. Secretary | Sell | Dec 22, 2025 | $15,249.48 | 11,951 | $1.28 | 948,855 |
Vieceli John S. Chief Product Officer | Sell | Dec 22, 2025 | $27,978.85 | 21,927 | $1.28 | 800,973 |
Keyes Jeffry R. Chief Financial Officer | Sell | Dec 22, 2025 | $11,008.05 | 8,627 | $1.28 | 1.2M |
Hawkins Jeffrey Alan President & CEO | Sell | Sep 23, 2025 | $17,401.31 | 10,643 | $1.64 | 2.6M |
LaPointe Christian GC & Corp. Secretary | Sell | Sep 23, 2025 | $8,770.14 | 5,364 | $1.64 | 960,806 |
Vieceli John S. Chief Product Officer | Sell | Sep 23, 2025 | $16,093.31 | 9,843 | $1.64 | 822,900 |
Bennett Todd C. Chief Commercial Officer | Sell | Sep 23, 2025 | $30,218.07 | 18,482 | $1.64 | 681,521 |
Keyes Jeffry R. Chief Financial Officer | Sell | Sep 23, 2025 | $6,332.35 | 3,873 | $1.64 | 1.2M |
LaPointe Christian GC & Corp. Secretary | Sell | Sep 22, 2025 | $9,025.47 | 5,364 | $1.68 | 966,170 |
Vieceli John S. Chief Product Officer | Sell | Sep 22, 2025 | $16,561.83 | 9,843 | $1.68 | 832,743 |
Bennett Todd C. Chief Commercial Officer | Sell | Sep 22, 2025 | $31,097.81 | 18,482 | $1.68 | 700,003 |