QSI
Quantum-Si-A (QSI)
NASDAQ
$1.19-$0.05 (-4.03%)
Price as of Jun 03, 2026 6:48 PM EDT
  • $235.4M
    Market Cap
  • -29.55%
    1-Year Change
  • Medical Devices
    Industry

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

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)
  • 2
    Number of InsiderBuying (last 12 months)
  • $477,793.76
    Amount of InsiderBuying (last 12 months)
  • 5
    Number of InsiderSelling (last 12 months)
  • $43.5M
    Amount 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