TECOGEN INC. (TGEN)
Tecogen Inc. specializes in the design, manufacturing, sales, and ongoing support of industrial and commercial combined heat and power (CHP) systems. These energy solutions cater to a wide range of applications—residential, commercial, recreational, and industrial—both within the United States and internationally. The company's operations are segmented into three main areas: Products, Services, and Energy Production. Its product offerings include: Cogeneration units, such as the InVerde e+ and TecoPower models, which efficiently produce both electricity and hot water. TECOCHILL branded chillers for air conditioning and refrigeration purposes. Tecofrost gas engine-driven compressors used in refrigeration systems. Ilios brand water heaters. Ultera emissions control technology. Beyond equipment sales, Tecogen provides extensive support services, including long-term maintenance contracts, spare parts sales, and comprehensive turnkey installation. These services are delivered through a network of eleven field service centers located strategically across California, the Midwest, the Northeast, the Southeast, and Ontario, Canada. Additionally, the company undertakes the installation, ownership, operation, and maintenance of distributed generation systems for electricity and other energy solutions, along with complementary technologies. Tecogen serves a diverse clientele spanning numerous sectors, such as healthcare (hospitals, nursing homes), education (colleges, universities), hospitality (hotels, motels, health clubs, spas), commercial real estate (office, retail buildings), manufacturing (food and beverage processors, factories), multi-unit residential properties, and specialized facilities like laundries, ice rinks, swimming pools, municipal buildings, military installations, and indoor growing operations. Established in 2000, Tecogen Inc. is headquartered in Waltham, Massachusetts.
Sector: Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip
Industry: Electrical Equipment & Parts
Tecogen Inc.
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based on 30.19M shares outstanding
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 chillers; Tecofrost gas engine-driven refrigeration compressors; and water heaters under the Ilios brand name, as well as emissions control technology under the Ultera brand name.
It also provides long-term maintenance contracts, parts sales, and turnkey installation services through a network of eleven field service centers in California, the Midwest, the Northeast, and the Southeast, as well as in Ontario, Canada.
In addition, the company installs, owns, operates, and maintains distributed generation of electricity, energy, and other complementary systems.
It serves hospitals and nursing homes, colleges, universities, health clubs, spas, hotels, motels, office and retail buildings, food and beverage processors, multi-unit residential buildings, laundries, ice rinks, swimming pools, factories, municipal buildings, military installations, and indoor growing facilities.
The company was incorporated in 2000 and is headquartered in Waltham, Massachusetts.
Leadership
Abinand Rangesh
Chief Executive Officer & Director
Ahmed F. Ghoniem
Director
Earl L. Lewis, III
Director
John N. Hatsopoulos
Lead Director
Employees
91
Country
US
Sector
Industrials
Website
tecogen.com
| Insider | Title | Type | Shares | Value | Date |
|---|---|---|---|---|---|
| General Counsel & Secretary | Grant/Award | 19.3K | -- | Jun 26, 2026 | |
| Director | Grant/Award | 25.0K | $129.3K | Jun 26, 2026 | |
| VP of Business Development | Grant/Award | 29.0K | -- | Jun 26, 2026 | |
| COO and President | Grant/Award | 9.7K | -- | Jun 26, 2026 | |
| Chief Executive Officer | Grant/Award | 174.1K | -- | Jun 26, 2026 | |
| Chief Financial Officer | Grant/Award | 29.0K | -- | Jun 26, 2026 |
| Name | Shares | % | Source |
|---|---|---|---|
Portolan Capital Management, LLC | 1.6M | 5.1% | 13F |
Hatsopoulos John Director | 1.0M | 3.4% | FORM 4 |
Lewis Earl Director | 1.0M | 3.3% | FORM 4 |
VANGUARD CAPITAL MANAGEMENT LLC | 788.7K | 2.6% | 13F |
BARD ASSOCIATES INC | 682.2K | 2.3% | 13F |
Clear Harbor Asset Management, LLC | 650.0K | 2.2% | 13F |
Tryfon Natsis and Depoina Pantopoulou, as Joint Tenants with the Right of Survivorship · may incl. warrants· filed Aug 2025 | 460.3K | 1.5% | 13G |
GRATIA CAPITAL, LLC | 388.7K | 1.3% | 13F |
UBS Group AG | 363.0K | 1.2% | 13F |
Meros Investment Management, LP | 353.5K | 1.2% | 13F |
Insiders
- Whiting John Kimball IVGeneral Counsel & Secretary
- Galiteva AngelinaDirector
- Lafaille StephenVP of Business Development
- Panora RobertCOO and President
- Rangesh AbinandChief Executive Officer
- Deschenes Roger P.Chief Financial Officer
- Hirsch Susan BDirector
- ALBERTINE JOHN MDirector
- Lewis EarlDirector
- Ghoniem AhmedDirector
based on 30.19M shares outstanding
30d Avg
218.59K
60d Avg
179.67K
90d Avg
181.94K