John S. Vieceli Quantum Si Inc (QSI) insider trading activity

QSI Quotes by TradingView

John S. Vieceli is Chief Product Officer of Quantum-Si Inc. Currently has a direct ownership of 800,973 shares of QSI, which is worth approximately $1.14 Million. The most recent transaction as insider was on Dec 22, 2025, when has been sold 21,927 shares (Class A Common Stock) at a price of $1.28 per share, resulting in proceeds of $28,066. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 801K
2.66% 3M change
399.07% 12M change
Total Value Held $1.14 Million

John S. Vieceli Transaction History

Date Transaction Value Shares Traded Shares Held Form
Dec 22 2025
SELL
Open market or private sale
$28,066 $1.28 p/Share
21,927 Reduced 2.66%
800,973 Class A Common Stock
Sep 23 2025
SELL
Open market or private sale
$16,142 $1.64 p/Share
9,843 Reduced 1.18%
822,900 Class A Common Stock
Sep 22 2025
SELL
Open market or private sale
$16,536 $1.68 p/Share
9,843 Reduced 1.17%
832,743 Class A Common Stock
Jun 23 2025
SELL
Open market or private sale
$35,296 $1.61 p/Share
21,923 Reduced 2.54%
842,586 Class A Common Stock
Mar 21 2025
SELL
Open market or private sale
$6,000 $1.39 p/Share
4,317 Reduced 0.5%
864,509 Class A Common Stock
Mar 12 2025
BUY
Grant, award, or other acquisition
-
708,333 Added 44.91%
868,826 Class A Common Stock
Dec 23 2024
SELL
Open market or private sale
$5,554 $1.29 p/Share
4,306 Reduced 2.61%
160,493 Class A Common Stock
Sep 24 2024
SELL
Open market or private sale
$1,968 $0.93 p/Share
2,117 Reduced 1.27%
164,799 Class A Common Stock
Sep 23 2024
SELL
Open market or private sale
$2,082 $0.95 p/Share
2,192 Reduced 1.3%
166,916 Class A Common Stock
JSV

John S. Vieceli

Chief Product Officer
Branford, CT

Track Institutional and Insider Activities on QSI

Follow Quantum-Si Inc and customize your updates to receive the information that matters most to you.

Institutional Portfolio Updates

Receive a notification when an Institution or Guru buys or sells QSI shares.

Notify only if

Insider Trading

Get notified when an Quantum Si Inc insider buys or sells QSI shares.

Notify only if

News

Receive news related to Quantum-Si Inc

Choose your preferred platform and Sign Up 👇 Telegram Email
Track Activities on QSI