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
Jul 24, 2025 Buy	Common Stock A-Award	Lafaille Stephen Vp Of Business Development	Officer	11 976 Value: $100.0K
Jul 24, 2025 Buy	Stock Option (Right to Buy) A-Award	Whiting John Kimball Iv General Counsel & Secretary	Officer	24 075 Value: $201.0K
Jul 24, 2025 Buy	Common Stock A-Award	Whiting John Kimball Iv General Counsel & Secretary	Officer	11 976 Value: $100.0K
Jul 24, 2025 Buy	Stock Option (Right to Buy) A-Award	Deschenes Roger P. Cao	Officer	12 063 Value: $100.7K
Jul 24, 2025 Buy	Common Stock A-Award	Deschenes Roger P. Cao	Officer	17 964 Value: $150.0K
Jul 24, 2025 Buy	Stock Option (Right to Buy) A-Award	Rangesh Abinand Chief Executive Officer	CEO / President	12 048 Value: $100.6K
Jul 24, 2025 Buy	Stock Option (Right to Buy) A-Award	Rangesh Abinand Chief Executive Officer	CEO / President	24 075 Value: $201.0K
Jul 24, 2025 Buy	Common Stock A-Award	Rangesh Abinand Chief Executive Officer	CEO / President	53 892 Value: $450.0K
Jul 24, 2025 Buy	Stock Option (Right to Buy) A-Award	Hirsch Susan B Director	Director	25 000 Value: $208.8K
Jul 24, 2025 Buy	Stock Option (Right to Buy) A-Award	Ghoniem Ahmed Director	Director	25 000 Value: $208.8K
Jul 24, 2025 Buy	Stock Option (Right to Buy) A-Award	Lewis Earl R Director	Director	25 000 Value: $208.8K
Jul 24, 2025 Buy	Stock Option (Right to Buy) A-Award	Galiteva Angelina Director	Director	25 000 Value: $208.8K
Jul 24, 2025 Buy	Stock Option (Right to Buy) A-Award	Galiteva Angelina Director	Director	25 000 Value: $208.8K
Jul 24, 2025 Buy	Stock Option (Right to Buy) A-Award	Lewis Earl R Director	Director	25 000 Value: $208.8K
Jul 24, 2025 Buy	Stock Option (Right to Buy) A-Award	Ghoniem Ahmed Director	Director	25 000 Value: $208.8K
Jul 24, 2025 Buy	Stock Option (Right to Buy) A-Award	Hirsch Susan B Director	Director	25 000 Value: $208.8K
Jul 24, 2025 Buy	Common Stock A-Award	Rangesh Abinand Chief Executive Officer	CEO / President	53 892 Value: $450.0K
Jul 24, 2025 Buy	Stock Option (Right to Buy) A-Award	Rangesh Abinand Chief Executive Officer	CEO / President	24 075 Value: $201.0K
Jul 24, 2025 Buy	Stock Option (Right to Buy) A-Award	Rangesh Abinand Chief Executive Officer	CEO / President	12 048 Value: $100.6K
Jul 24, 2025 Buy	Common Stock A-Award	Deschenes Roger P. Cao	Officer	17 964 Value: $150.0K
Jul 24, 2025 Buy	Stock Option (Right to Buy) A-Award	Deschenes Roger P. Cao	Officer	12 063 Value: $100.7K
Jul 24, 2025 Buy	Common Stock A-Award	Whiting John Kimball Iv General Counsel & Secretary	Officer	11 976 Value: $100.0K
Jul 24, 2025 Buy	Stock Option (Right to Buy) A-Award	Whiting John Kimball Iv General Counsel & Secretary	Officer	24 075 Value: $201.0K
Jul 24, 2025 Buy	Common Stock A-Award	Lafaille Stephen Vp Of Business Development	Officer	11 976 Value: $100.0K
Jul 24, 2025 Buy	Stock Option (Right to Buy) A-Award	Lafaille Stephen Vp Of Business Development	Officer	24 075 Value: $201.0K

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...

Read Full Profile Here