Tecogen shares surge 20.55% intraday after reporting 2025 earnings with 19.7% revenue growth to $27.07 million and 105.5% product revenue increase, beating expectations.

Tecogen surged 20.55% intraday, driven by its Q4 2025 earnings report showing a 19.7% revenue increase to $27.07 million and a 105.5% rise in product revenue. The company specializes in developing and producing natural gas-powered CHP systems for commercial and industrial sectors, aiming to enhance energy efficiency, reduce costs, and lower emissions.