Tecogen Inc. (TGEN)
NYSE · Industrials
Tecogen Inc. Stock Price History 2011–2025
Tecogen Inc.
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Historical daily closing price for Tecogen Inc. since 2014, adjusted for splits and dividends. The latest closing stock price for Tecogen Inc. as of June 11, 2026 is 5.46.
- The all-time high Tecogen Inc. stock closing price was 20.80 on May 22, 2014.
- The Tecogen Inc. 52-week high stock price is 12.07, which is 121.1% above the current share price.
- The Tecogen Inc. 52-week low stock price is 2.00, which is 63.4% below the current share price.
- The average Tecogen Inc. stock price for the last 52 weeks is 6.14.
Annual Close Price
YEAR-END CLOSE · USD
ANNUAL % CHANGE · %
| Year | Average | Year Open | Year High | Year Low | Year Close | Annual % Change |
|---|---|---|---|---|---|---|
| 2026 | 4.21 | 5.34 | 6.90 | 2.00 | 5.46 | +10.53% |
| 2025 | 5.55 | 1.55 | 12.07 | 1.55 | 4.94 | +237.20% |
| 2024 | 0.85 | 0.78 | 1.90 | 0.63 | 1.47 | +80.86% |
| 2023 | 1.02 | 1.25 | 1.27 | 0.75 | 0.81 | -35.20% |
| 2022 | 1.29 | 1.20 | 1.74 | 0.93 | 1.25 | +4.17% |
| 2021 | 1.74 | 1.25 | 2.38 | 1.10 | 1.20 | -1.64% |
| 2020 | 1.17 | 2.16 | 2.20 | 0.66 | 1.22 | -42.45% |
| 2019 | 3.22 | 3.70 | 4.10 | 2.09 | 2.12 | -41.60% |
| 2018 | 3.18 | 2.62 | 4.19 | 2.20 | 3.63 | +34.44% |
| 2017 | 3.38 | 3.94 | 4.26 | 2.32 | 2.70 | -35.71% |
| 2016 | 4.25 | 3.32 | 5.87 | 2.85 | 4.20 | +20.00% |
Tecogen Inc. Stock Price History — FAQ
Tecogen Inc. (TGEN) stock price history over the last 15 years — annual and quarterly figures with year-over-year growth and charts.
Where can I see TGEN's stock price history history?
The chart and table above show Tecogen Inc.'s stock price history by year and by quarter, including the growth rate.