Tecogen Inc. (TGEN) is a leading provider of clean energy products that significantly reduce operational costs and greenhouse gas emissions. It is a US-based company located in Waltham, Massachusetts, dedicated to the design, manufacture, marketing, and maintenance of industrial-level, ultra-efficient clean energy solutions.
The company’s product lineup – including its advanced natural gas engines, generators, and cogeneration systems – is designed to help businesses and facilities across America minimize their energy expenses and environmental impact. Tecogen's offerings are developed to be economical, efficient, and environmentally friendly, bolstering its position in the growing clean energy market.
A significant portion of Tecogen's product line is innovative cogeneration systems, also known as Combined Heat and Power (CHP) systems. These are designed to produce electricity and useful thermal energy in a single, integrated system. This process recaptures and utilizes the heat that is a by-product of electricity generation, hence optimizing energy use and making it economically efficient.
Furthermore, Tecogen offers Tecochill chillers, a line of water-cooled, natural gas-driven chillers that cool water using natural gas instead of electricity, providing both cooling and free hot water. This technology aims to capitalize on significant savings that can be achieved when electricity is replaced by natural gas.
Additionally, the company sells InVerde e+ micro-CHP, an ultra-efficient electrical power generator that provides electricity and heat. The units are designed to provide emergency backup power, functioning when the primary power grid fails. Whether used standalone or as part of a microgrid, enhanced electronic controls make InVerde an ideal solution for accommodating renewable power inputs.
Other offerings include its patented Ultera emissions control technology, which significantly reduces harmful emissions from natural gas-fueled engines, further enhancing Tecogen's commitment to clean, green energy. The company maintains a broad customer base, including healthcare centers, hotels, residential buildings, utilities, recreational facilities, industrial complexes and more.
Besides manufacturing, Tecogen Inc. provides long-term support to its clients, offering comprehensive installation, maintenance, and repair services. This side of the business enables customers to prolong the longevity of their Tecogen products and ensure they continue to function at peak efficiency.
With over 3 decades of experience as an industry player, Tecogen has carved out a niche for itself in the competitive clean energy market. Its passion for energy efficiency, exceptional technological solutions, and commitment to a sustainable environment set Tecogen apart in the sector.
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TECOGEN INC. (AMEX: TGEN) awarded 9,671 shares to its COO and President, Panora Robert, on June 26, 2026, at a price of $0 per share. Following this grant, Robert's total ownership in the company increased to 72,194 shares. This transaction provides transparency into executive compensation and insider holdings.
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TECOGEN INC. (AMEX: TGEN) awarded 19,342 shares at no cost to its General Counsel and Secretary, Whiting John Kimball IV, on June 26, 2026. This transaction increased Kimball's total ownership in the company to 41,954 shares. The grant provides insight into his significant stake in TECOGEN INC.

TECOGEN INC. (AMEX: TGEN) awarded Lafaille Stephen, VP of Business Development, 29,013 shares at no cost on June 26, 2026. This grant significantly increased Stephen's total holdings to 41,389 shares. The transaction is classified under SEC transaction code A, indicating it as an award or grant.
Tecogen Inc. (TGEN) reported a 21% decrease in total revenue for Q2 2026 to $5.8 million and a wider net loss of $2.2 million, primarily due to lower product sales. Despite these declines, the company showed strong momentum in the data center market, conducting 12 product demonstrations with major data centers and building an $8 million backlog, anticipating further project closures. CEO Abinand Rangesh emphasized strategic inventory building to reduce lead times and capitalize on growing interest from large data center operators facing power constraints.