TECOGEN INC. — Director's Dealing 2017

May 26, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TECOGEN INC. (TGEN)
CIK: 0001537435
Period of Report: 2017-05-23

Reporting Person: Benjamin Locke M. (Co-CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-05-23	Common Stock	J	1418	—	Acquired	1418	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-05-23	Stock Option (Right to Buy)	$18.15	J	13800	Acquired	2018-06-03	Common Stock (13800.0)	Direct
2017-05-23	Stock Option (Right to Buy)	$10.33	J	9200	Acquired	2024-10-29	Common Stock (9200.0)	Direct
2017-05-23	Stock Option (Right to Buy)	$5.65	J	18400	Acquired	2024-12-11	Common Stock (18400.0)	Direct
2017-05-23	Stock Option (Right to Buy)	$5.65	J	9200	Acquired	2025-06-10	Common Stock (9200.0)	Direct

Footnotes

F1: Following the completion of the Merger and pursuant to the Merger Agreement between the Company and American DG Energy Inc. dated November 1, 2016 and as amended March 23, 2017, American DG Energy's securities were converted to securities of the Company.

F2: These options vested pursuant to the completion of the Merger between the Company and American DG Energy Inc.