Robert A. Panora - May 27, 2025 Form 4/A - Amendment Insider Report for TECOGEN INC. (TGEN)

Role: COO and President
Signature: /s/ Robert A. Panora
Stock symbol: TGEN
Transactions as of: May 27, 2025
Transactions value $: $0
Form type: 4/A - Amendment
Date filed: 7/14/2025, 09:00 AM
Date Of Original Report: Jun 2, 2025
Previous filing: May 6, 2022
Next filing: Jul 14, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
PANORA ROBERT A	COO and President	C/O TECOGEN, INC., 76 TREBLE COVE ROAD, BLDG 1, N. BILLERICA	/s/ Robert A. Panora	2025-07-14	0001585814

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	TGEN	Common Stock	Options Exercise	$49.7K	+70K		$0.71	70K	May 27, 2025	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	TGEN	Stock Options (Right to Buy)	Options Exercise	-$49.7K	-70K	-35%	$0.71	130K	May 27, 2025	Common Stock	70K	$0.71	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Transaction code corrected
F2	100,000 shares of the 200,000 option shares granted pursuant to Stock Option Agreement dated 7/9/2020 vested on 6/30/2022 upon achievement of Adjusted EBITDA performance milestone.