NASDAQ:TGEN

Tecogen Stock Insider Trading

Industrials > Electrical Equipment & Parts

Buy TGEN

*Your capital is at risk

$3.32

+0.120 (+3.75%)

At Close: Jul 31, 2026

Tecogen Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be negative at -8.24. In total, the insiders bought 2.24M and sold 325.4K TGEN shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 100 transactions)	-8.24
● Buy	2.24M shares
● Sell	325.4K shares
82% Buy Activity Strong Negative Correlation
Buy Signal Low Confidence Jun 26, 2026 Analysis Breakdown: Weakened by a contradictory negative Insider Power Score. Confidence increased due to high data reliability score of 100. Supported by overwhelming buy-side pressure (82% buys).

Historical Insider Trades

Date	Type	Person	Role	Amount
Jun 06, 2025 Sell	Stock Options (Right to Buy) X-InTheMoney	Lafaille Stephen Vp Of Business Development	Officer	25 000 Value: $27.5K
Jun 04, 2025 Sell	Common Stock S-Sale	Panora Robert A COO And President	CEO / President	31 000 Value: $155.0K
Jun 04, 2025 Sell	Common Stock S-Sale	Panora Robert A COO And President	CEO / President	31 000 Value: $155.0K
Jun 04, 2025 Sell	Common Stock S-Sale	Lafaille Stephen Vp Of Business Development	Officer	15 000 Value: $75.0K
Jun 04, 2025 Buy	Common Stock X-InTheMoney	Lafaille Stephen Vp Of Business Development	Officer	15 000 Value: $10.7K
Jun 04, 2025 Sell	Stock Options (Right to Buy) X-InTheMoney	Lafaille Stephen Vp Of Business Development	Officer	15 000 Value: $10.7K
Jun 03, 2025 Sell	Common Stock S-Sale	Panora Robert A COO And President	CEO / President	26 000 Value: $121.9K
Jun 03, 2025 Sell	Common Stock S-Sale	Panora Robert A COO And President	CEO / President	26 000 Value: $121.9K
Jun 03, 2025 Buy	Common Stock X-InTheMoney	Lafaille Stephen Vp Of Business Development	Officer	10 000 Value: $7K
Jun 03, 2025 Sell	Common Stock S-Sale	Lafaille Stephen Vp Of Business Development	Officer	10 000 Value: $48.8K
Jun 03, 2025 Sell	Common Stock S-Sale	Lafaille Stephen Vp Of Business Development	Officer	10 000 Value: $48.8K
Jun 03, 2025 Buy	Common Stock X-InTheMoney	Lafaille Stephen Vp Of Business Development	Officer	10 000 Value: $7K
May 27, 2025 Buy	Stock Options (Right to Buy) M-Exempt	Panora Robert A COO And President	CEO / President	70 000 Value: $49.7K
May 27, 2025 Buy	Common Stock M-Exempt	Panora Robert A COO And President	CEO / President	70 000 Value: $49.7K
May 27, 2025 Buy	Common Stock M-Exempt	Panora Robert A COO And President	CEO / President	70 000 Value: $49.7K
May 27, 2025 Buy	Stock Options (Right to Buy) M-Exempt	Panora Robert A COO And President	CEO / President	70 000 Value: $49.7K
Mar 03, 2025 Buy	Common Stock P-Purchase	Lafaille Stephen Vp Of Business Development	Officer	400 Value: $1K
Sep 20, 2024 Buy	Stock Option (Right to Buy)	Deschenes Roger P. Cao	Officer	37 500 Value: $33.0K
Apr 23, 2024 Buy	Common Stock	Lafaille Stephen Vp Of Business Development	Officer	0 Value: $0
Apr 23, 2024 Buy	Stock Options (Right to Buy)	Lafaille Stephen Vp Of Business Development	Officer	50 000 Value: $35.5K
Apr 23, 2024 Buy	Common Stock	Deschenes Roger P. Cao	Officer	0 Value: $0
Apr 23, 2024 Buy	Stock Options (Right to Buy)	Deschenes Roger P. Cao	Officer	50 000 Value: $39.0K
Jan 21, 2023 Buy	Stock Options (Right to Buy)	Lafaille Stephen Vp Of Business Development	Officer	52 500 Value: $57.8K
Jan 21, 2023 Buy	Stock Options (Right to Buy)	Deschenes Roger P. Cao	Officer	52 500 Value: $57.8K
Apr 29, 2017 Buy	Stock Options (Right to Buy)	Lafaille Stephen Vp Of Business Development	Officer	6 362 Value: $25.0K

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks

ABOUT TECOGEN INC.

Tecogen Inc. designs, manufactures, markets, and maintains industrial and commercial cogeneration systems for residential, commercial, recreational, and industrial use in the United States and internationally. It operates through three segments: Products, Services, and Energy Production. The company offers InVerde e+ and TecoPower, a cogeneration product that supplies electricity and hot water; TECOCHILL air-conditioning and refrigeration chiller...

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