Tecogen Inc.
TGEN Industrials Electrical Equipment & Parts
Tecogen Inc.’s revenue for fiscal 2025 (year ended December 2025) was $27.1 million, up 19.7% from fiscal 2024. In the quarter to June 2026, revenue fell 21.2%, EPS fell 16.7%, free cash flow grew 11.9% and total debt fell 43.2%, each against the same quarter a year earlier. Insiders bought in the last twelve months.
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Tecogen Inc. (TGEN) P/E ratio
Tecogen Inc. has no meaningful P/E ratio: its trailing twelve-month earnings is negative. Over the past ten years it has ranged from 0.0× (October 2026) to 1,586× (July 2017) — the current reading is the lowest in ten years.
P/E ratio, daily
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Annual newest first
| Period | P/E ratio | Change |
|---|---|---|
| FY2025 | 0.0× | — |
| FY2024 | 0.0× | — |
| FY2023 | 0.0× | — |
| FY2022 | 0.0× | — |
| FY2021 | 7.9× | — |
| FY2020 | 0.0× | — |
| FY2019 | 0.0× | — |
| FY2018 | 0.0× | — |
| FY2017 | 1,191× | — |
| FY2016 | 0.0× | — |
Quarterly newest first
| Period | P/E ratio | Change |
|---|---|---|
| Jun 2026 | 0.0× | — |
| Mar 2026 | 0.0× | — |
| Dec 2025 | 0.0× | — |
| Sep 2025 | 0.0× | — |
| 42 more quarters | Free account |
Against its own ten years
P/E ratio against peers
| Company | P/E ratio |
|---|---|
| STI Solidion Technology Inc. compare | n/m |
| CBAT China BAK Battery, Inc. compare | n/m |
| NEOV NeoVolta, Inc. compare | n/m |
| SKYX SKYX Platforms Corp. compare | n/m |
| NVX NOVONIX Limited Sponsored ADR compare | n/m |
| ULBI Ultralife Corporation compare | n/m |
| TGEN Tecogen Inc. | n/m |
| OESX Orion Energy Systems, Inc. compare | n/m |
| RFIL RF Industries, Ltd. compare | 31.2× |
| Electrical Equipment & Parts industry median | 31.2× |
| Industrials sector median | 24.7× |
| Market median | 18.1× |
What P/E ratio is
Price to Earnings Ratio shows how much investors pay for each dollar of a company’s annual profit per share.
Stock Price ÷ EPS (Basic) (TTM)