![]() Tecogen Tecogen is a company that designs, manufactures, markets, installs, and maintains combined heat and power products. | ![]() Constellation Energy Constellation Energy Generation is a company that produces and supplies energy products. | |
Founding Date | Founding Date 2000 | Founding Date 1999 |
Type | Type Public | Type Public |
Tags | ||
Locations | Locations North Billerica, US HQ Toronto, CA Portland, US Waltham, US | |
Employees | Employees 911% decrease | Employees 13,37014% increase |
Valuation ($) | Valuation ($) 21.4 m | Valuation ($) 83.5 b |
Financial | ||
Revenue (est.) | Revenue (est.) $27.1m (FY, 2025) | Revenue (est.) $25.5b (FY, 2025) |
Net income | Net income ($8.2m) (FY, 2025) | Net income $2.3b (FY, 2025) |

Constellation Energy Generation is a company that produces and supplies energy products.
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