TECOGEN INC. (TGEN) Insider Trading & SEC Filings

Updated Jul 16, 2026 · Last SEC filing 2026-07-01

TECOGEN INC. (TGEN) has filed 11 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-01. 3 Form 8-K material event filings were reported by TGEN in the last 90 days. InsiderAlpha tracks every TGEN SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.

About TECOGEN INC. (TGEN)

SIC classification	Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (SIC 3585)
SEC CIK	0001537435

90-Day SEC Filing Activity

Form 4 filings (90d)	11
Form 8-K filings (90d)	3
Latest Form 4 filing	2026-07-01

Recent TGEN Insider Transactions (Form 4)

Date	Insider	Role	Transaction	Shares	Price	Value	Filing
2026-06-26	Whiting John Kimball IV	General Counsel & Secretary	A — Grant or award	19.3K	—	—	SEC
2026-06-26	PANORA ROBERT A	COO and President	A — Grant or award	9.7K	—	—	SEC
2026-06-26	Deschenes Roger P.	CAO	A — Grant or award	29.0K	—	—	SEC
2026-06-26	Lafaille Stephen	VP of Business Development	A — Grant or award	29.0K	—	—	SEC
2026-06-26	Rangesh Abinand	Chief Executive Officer	A — Grant or award	174.1K	—	—	SEC
2026-04-24	GHONIEM AHMED	Director	P — Open-market purchase	12.7K	$0.79	$10K	SEC
2026-04-13	Hirsch Susan B	Director	P — Open-market purchase	5.0K	$3.73	$19K	SEC
2026-03-27	Hirsch Susan B	Director	P — Open-market purchase	10.0K	$2.54	$25K	SEC
2026-03-26	LEWIS EARL R	Director	P — Open-market purchase	5.0K	$2.88	$14K	SEC
2026-03-23	Whiting John Kimball IV	General Counsel & Secretary	P — Open-market purchase	10.0K	$2.38	$24K	SEC
2026-03-20	Deschenes Roger P.	CAO	P — Open-market purchase	10.0K	$2.23	$22K	SEC
2026-03-20	Hatsopoulos John	Director	M — Option exercise	50.0K	$0.88	$44K	SEC
2026-03-20	Rangesh Abinand	Chief Executive Officer	P — Open-market purchase	3.0K	$2.30	$7K	SEC
2025-07-24	Whiting John Kimball IV	General Counsel Secretary	A — Grant or award	12.0K	$0.00	—	SEC
2025-07-24	Lafaille Stephen	VP of Business Development	A — Grant or award	12.0K	$0.00	—	SEC

All transactions sourced from SEC EDGAR Form 4 filings for TECOGEN INC. (TGEN). Updated in real time as new filings are submitted to the SEC.

Most-Active TGEN Insiders — Last 90 Days

Insider	Form 4 filings	Total transaction value
GHONIEM AHMED	3	$149K
Rangesh Abinand	2	$135K
PANORA ROBERT A	2	$135K
GALITEVA ANGELINA	1	$129K
Hirsch Susan B	1	$129K

Recent TGEN Form 8-K Material Events

2026-07-01 — Item 5.02 [SEC]
2026-06-05 — Item 5.07 [SEC]
2026-05-12 — Item 2.02, 7.01, 9.01 [SEC]
2026-04-08 — Item 8.01, 9.01 · Other · neutral [SEC]
Tecogen Inc. extended its Advisory Agreement with John N. Hatsopoulos through March 31, 2028. The extension was approved by the Board of Directors on April 7, 2026 and formalized via letter agreement on April 8, 2026.
2026-03-17 — Item 2.02, 7.01, 9.01 · Earnings · neutral [SEC]
Tecogen Inc. issued a press release on March 17, 2026 with earnings commentary and supplemental information for the three and twelve months ended December 31, 2025. The company will present earnings call slides on March 18, 2026. No specific financial metrics, beat/miss language,

Recent Insider Filings

2026-07-01 — Whiting John Kimball IV (General Counsel & Secretary)
2026-07-01 — Lafaille Stephen (VP of Business Development)
2026-07-01 — Deschenes Roger P. (CAO)
2026-07-01 — PANORA ROBERT A (COO and President)
2026-07-01 — Rangesh Abinand (Chief Executive Officer)

Form 4 Transaction Code Reference

SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in TGEN insider filings:

P	Open-market purchase by the insider
S	Open-market sale by the insider
A	Grant, award, or other acquisition from the issuer
M	Exercise or conversion of derivative security (e.g. options)
F	Payment of exercise price or tax liability via share withholding
G	Bona-fide gift of securities
D	Disposition to the issuer (e.g. share buyback participation)
J	Other acquisition or disposition
X	Exercise of in-the-money or at-the-money derivative security
C	Conversion of derivative security
V	Transaction voluntarily reported earlier than required

TGEN Insider Trading — FAQ

What is the latest insider trade for TGEN?: TECOGEN INC. (TGEN) had 11 insider filings in the last 90 days, with the most recent on 2026-07-01. InsiderAlpha tracks every Form 4, 10-K, 10-Q, and 8-K filing in real time.
How many insiders are buying TGEN stock?: 0 insider purchases of TGEN were filed in the last 90 days.
How many insiders are selling TGEN stock?: 0 insider sales of TGEN were filed in the last 90 days.
Where can I see TGEN SEC filings (Form 4, 10-K, 10-Q, 8-K)?: InsiderAlpha aggregates every TGEN SEC filing — Form 4 insider transactions, 10-K and 10-Q quarterly reports, and 8-K material event disclosures — in one timeline.

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