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

John S. Vieceli is Chief Product Officer of Quantum-Si Inc. Currently has a direct ownership of 822,900 shares of QSI, which is worth approximately $2.32 Million. The most recent transaction as insider was on Sep 23, 2025, when has been sold 9,843 shares (Class A Common Stock) at a price of $1.64 per share, resulting in proceeds of $16,142. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 823K

2.34% 3M change

399.34% 12M change

Total Value Held $2.32 Million

John S. Vieceli Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
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

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