Lafaille Stephen - Insider Non-Derivative Transactions at TECOGEN INC. (TGEN) - (SEC)

Updated on January 3, 2026.

According to recent SEC insider information filed on Jul 24, 2025, Lafaille Stephen's relationship to TECOGEN INC. (TGEN) is Officer (VP of Business Development), and currently has 12,376 shares of Common Stock.

The chart below shows the number of shares owned, and the table shows the recent insider transactions.

You can see similar information for other TGEN insiders.

Related Topics: SEC Topic List.

Data Source: SEC.

Lafaille Stephen - Insider Non-Derivative Transactions of TGEN Common Stock

Lafaille Stephen - Insider Non-Derivative Transactions at TGEN

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Date	Transaction	No. of Shares	Price Per Share	Shares Owned After Transactions
Jul 25, 2025	Acquisition -- (Common Stock)	11976	0	12376
Jun 24, 2025	Sell -- (Common Stock)	10000	7.25	400
Jun 24, 2025	X -- (Common Stock)	10000	1.1	10400
Jun 7, 2025	Sell -- (Common Stock)	25000	5.98	400
Jun 7, 2025	X -- (Common Stock)	25000	1.1	25400
Jun 5, 2025	Sell -- (Common Stock)	15000	5	400
Jun 5, 2025	X -- (Common Stock)	15000	0.71	15400
Jun 4, 2025	Sell -- (Common Stock)	10000	4.88	400
Jun 4, 2025	X -- (Common Stock)	10000	0.71	10400
Mar 4, 2025	P -- (Common Stock)	400	2.5	400