Tecogen Inc. (TGEN) Insider Trading

Last 12 months

Insiders bought $134k on the open market and sold nothing.

Net open-market

+$134k

8 buys · 0 sales

Under a 10b5-1 plan

—

no sales

Insiders who bought / sold

6 / 0

executives and directors

Last open-market buy

Apr 2026

Apr 24, 2026

Get an email when TGEN's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Apr 24	Ahmed Ghoniem Director	Bought	12,723	$0.79	$10k	New	Form 4
Apr 13	Susan B Hirsch Director	Bought	5,000	$3.73	$19k	1.9%	Form 4
Mar 27	Susan B Hirsch Director	Bought	10,000	$2.54	$25k	4.0%	Form 4
Mar 27	Earl Lewis Director	Bought	5,000	$2.52	$13k	0.5%	Form 4
Mar 26	Earl Lewis Director	Bought	5,000	$2.88	$14k	0.5%	Form 4
Mar 23	John Kimball Whiting IV General Counsel & Secretary	Bought	10,000	$2.38	$24k	79%	Form 4
Mar 20	Roger P. Deschenes CAO	Bought	10,000	$2.23	$22k	23%	Form 4
Mar 20	Abinand Rangesh Chief Executive Officer	Bought	3,000	$2.30	$7k	4.7%	Form 4
Jun 3, 2025 – Jun 24, 2025	Robert A Panora COO and President	SoldNo plan 5 parts	102,700	$5.36 average	$551k	62%	Form 4
Jun 3, 2025 – Jun 23, 2025	Stephen Lafaille VP of Business Development	SoldNo plan 4 parts	60,000	$5.76 average	$346k	99%	Form 4
Mar 3, 2025	Stephen Lafaille VP of Business Development	Bought	400	$2.50	$1k	New	Form 4

Apr 24
Ahmed Ghoniem
Director · bought 12,723 at $0.79
$10k
New position
Apr 13
Susan B Hirsch
Director · bought 5,000 at $3.73
$19k
1.9% of stake
Mar 27
Susan B Hirsch
Director · bought 10,000 at $2.54
$25k
4.0% of stake
Mar 27
Earl Lewis
Director · bought 5,000 at $2.52
$13k
0.5% of stake
Mar 26
Earl Lewis
Director · bought 5,000 at $2.88
$14k
0.5% of stake
Mar 23
John Kimball Whiting IV
General Counsel & Secretary · bought 10,000 at $2.38
$24k
79% of stake
Mar 20
Roger P. Deschenes
CAO · bought 10,000 at $2.23
$22k
23% of stake
Mar 20
Abinand Rangesh
Chief Executive Officer · bought 3,000 at $2.30
$7k
4.7% of stake
Jun 3, 2025 – Jun 24, 2025No plan
Robert A Panora
COO and President · sold 102,700 at avg $5.36
$551k
62% of stake
Jun 3, 2025 – Jun 23, 2025No plan
Stephen Lafaille
VP of Business Development · sold 60,000 at avg $5.76
$346k
99% of stake
Mar 3, 2025
Stephen Lafaille
VP of Business Development · bought 400 at $2.50
$1k
New position

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch TGEN, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Spot a number that looks wrong? Check it in TGEN's SEC filings or

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Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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