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

Role: COO and President
Signature: /s/ Robert A. Panora
Issuer symbol: TGEN
Transactions as of: 27 May 2025
Net transactions value: $0
Form type: 4/A - Amendment
Filing time: 14 Jul 2025, 09:00:45 UTC
Date Of Original Report: 02 Jun 2025
Previous filing: 06 May 2022
Next filing: 14 Jul 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	14 Jul 2025	0001585814

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	TGEN	Common Stock	Options Exercise	$49,700	+70,000		$0.7100	70,000	27 May 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	$49,700	-70,000	-35%	$0.7100	130,000	27 May 2025	Common Stock	70,000	$0.7100	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.