Tecogen Stock Price History
NYSE: TGENIndustrialsIndustrial Machinery/ComponentsUSD
2.42-0.05 (-2.02%)
At close: Oct 9, 4:00 PM ET · Delayed 15 min
TGEN price history at a glance
The price history for Tecogen (TGEN) on this page begins on May 19, 2014, when the stock closed at $13.44; it most recently closed at $2.42 on October 5, 2026. The highest price in this record is $31.31, reached on May 19, 2014; the latest close is 92.3% below that peak. Across the 11 complete calendar years in the table, TGEN finished higher in 5 and lower in 6. Its best year was 2025 (+196.7%) and its worst was 2019 (-43.0%).
Over roughly 12 years the share price changed -82.0%, a -12.9% compound annual price return (excluding dividends). In the last 12 months alone, TGEN has lost 73.0%. Prices are split-adjusted closing prices; daily open, high, low, close and volume for the past year are listed below.
Summary generated from market data by MetaCap's automated system. Methodology
Key price levels
- High since 2014
- $31.31
- Date of high
- May 19, 2014
- Low since 2014
- $0.585
- Date of low
- Apr 22, 2024
- 52-week high
- $12.07
- 52-week low
- $1.94
- IPO year
- 2025
- Last close
- $2.42
TGEN returns
1 week
-8.68%
1 month
-21.68%
3 months
-41.26%
6 months
-15.09%
Year to date
-51.01%
1 year
-72.96%
3 years
+202.50%
5 years
+37.42%
TGEN price return, excluding dividends.
TGEN annual returns
| Year | Year-end close | Return |
|---|---|---|
| 2026 | 2.42 | -54.68% |
| 2025 | 5.34 | +196.67% |
| 2024 | 1.80 | +122.22% |
| 2023 | 0.81 | -35.20% |
| 2022 | 1.25 | +4.17% |
| 2021 | 1.20 | -1.64% |
| 2020 | 1.22 | -41.35% |
| 2019 | 2.08 | -43.01% |
| 2018 | 3.65 | +35.19% |
| 2017 | 2.70 | -35.71% |
| 2016 | 4.20 | +20.00% |
| 2015 | 3.50 | -30.14% |
| 2014* | 5.01 | -62.72% |
* Partial year: the record begins after the start of 2014; return measured from the first available close.
2026 return is year to date.
TGEN daily prices (past year)
| Date | Open | High | Low | Close | Change |
|---|---|---|---|---|---|
| 2.52 | 2.53 | 2.38 | 2.42 | -2.02% | |
| 2.73 | 2.77 | 2.35 | 2.47 | -10.51% | |
| 2.66 | 2.82 | 2.60 | 2.76 | +2.99% | |
| 2.58 | 2.77 | 2.51 | 2.68 | +5.51% | |
| 2.65 | 2.68 | 2.51 | 2.54 | -4.15% | |
| 2.71 | 2.78 | 2.63 | 2.65 | 0.00% | |
| 2.85 | 2.91 | 2.63 | 2.65 | -6.69% | |
| 3.02 | 3.10 | 2.73 | 2.84 | -3.73% | |
| 3.19 | 3.31 | 2.95 | 2.95 | -6.65% | |
| 3.00 | 3.24 | 2.98 | 3.16 | +3.61% | |
| 3.05 | 3.20 | 2.95 | 3.05 | +0.99% | |
| 3.14 | 3.28 | 3.02 | 3.02 | -4.13% | |
| 3.30 | 3.33 | 3.10 | 3.15 | -5.12% | |
| 3.30 | 3.38 | 3.19 | 3.32 | +0.30% | |
| 3.23 | 3.33 | 3.11 | 3.31 | +6.09% | |
| 3.10 | 3.18 | 3.01 | 3.12 | +0.32% | |
| 3.05 | 3.15 | 2.99 | 3.11 | +5.78% | |
| 2.97 | 3.05 | 2.89 | 2.94 | -1.01% | |
| 3.02 | 3.03 | 2.92 | 2.97 | -1.33% | |
| 2.97 | 3.05 | 2.91 | 3.01 | -1.31% | |
| 3.12 | 3.18 | 3.01 | 3.05 | +0.66% | |
| 3.04 | 3.15 | 3.01 | 3.03 | -1.94% | |
| 3.16 | 3.22 | 3.08 | 3.09 | -4.33% | |
| 3.18 | 3.35 | 3.10 | 3.23 | +3.19% | |
| 3.05 | 3.19 | 3.01 | 3.13 | +2.62% | |
| 3.00 | 3.06 | 2.92 | 3.05 | +3.39% | |
| 2.97 | 3.03 | 2.91 | 2.95 | -1.99% | |
| 2.98 | 3.04 | 2.75 | 3.01 | -1.63% | |
| 3.11 | 3.23 | 3.00 | 3.06 | -1.61% | |
| 3.17 | 3.18 | 3.05 | 3.11 | -1.89% | |
| 3.16 | 3.24 | 3.11 | 3.17 | +1.28% | |
| 3.14 | 3.29 | 3.09 | 3.13 | -1.57% | |
| 3.09 | 3.21 | 3.05 | 3.18 | +2.25% | |
| 3.40 | 3.40 | 2.99 | 3.11 | -9.06% | |
| 3.25 | 3.47 | 3.25 | 3.42 | +4.91% | |
| 3.32 | 3.42 | 3.13 | 3.26 | -2.98% | |
| 3.51 | 3.59 | 3.31 | 3.36 | -4.00% | |
| 3.50 | 3.56 | 3.32 | 3.50 | -1.96% | |
| 3.62 | 3.96 | 3.55 | 3.57 | -2.19% | |
| 4.12 | 4.13 | 3.56 | 3.65 | -12.89% | |
| 3.76 | 4.43 | 3.65 | 4.19 | +4.49% | |
| 4.06 | 4.15 | 3.94 | 4.01 | -1.23% | |
| 3.90 | 4.06 | 3.90 | 4.06 | +4.64% | |
| 3.90 | 4.00 | 3.83 | 3.88 | -0.26% | |
| 3.79 | 4.00 | 3.77 | 3.89 | +4.29% | |
| 3.71 | 3.86 | 3.70 | 3.73 | -0.80% | |
| 3.79 | 3.97 | 3.61 | 3.76 | +0.53% | |
| 3.71 | 3.88 | 3.71 | 3.74 | +2.47% | |
| 3.36 | 3.67 | 3.36 | 3.65 | +9.94% | |
| 3.27 | 3.37 | 3.22 | 3.32 | +3.75% | |
| 3.08 | 3.23 | 3.07 | 3.20 | +6.67% | |
| 3.07 | 3.30 | 2.91 | 3.00 | -3.23% | |
| 3.39 | 3.39 | 3.07 | 3.10 | -7.19% | |
| 3.28 | 3.44 | 3.16 | 3.34 | +3.73% | |
| 3.38 | 3.38 | 3.15 | 3.22 | -5.29% | |
| 3.44 | 3.64 | 3.34 | 3.40 | -3.95% | |
| 3.50 | 3.74 | 3.48 | 3.54 | -1.39% | |
| 3.52 | 3.59 | 3.32 | 3.59 | +4.06% | |
| 3.61 | 3.70 | 3.41 | 3.45 | -2.82% | |
| 3.58 | 3.68 | 3.49 | 3.55 | -4.83% | |
| 3.89 | 4.08 | 3.63 | 3.73 | -5.57% | |
| 4.07 | 4.22 | 3.86 | 3.95 | -1.50% | |
| 4.00 | 4.16 | 3.97 | 4.01 | +0.75% | |
| 4.08 | 4.10 | 3.92 | 3.98 | -3.40% | |
| 4.45 | 4.47 | 4.11 | 4.12 | -7.83% | |
| 4.10 | 4.51 | 4.01 | 4.47 | +9.83% | |
| 3.96 | 4.10 | 3.86 | 4.07 | +1.75% | |
| 4.27 | 4.45 | 3.95 | 4.00 | -8.26% | |
| 4.52 | 4.73 | 4.27 | 4.36 | -3.54% | |
| 4.87 | 5.14 | 4.36 | 4.52 | -8.32% | |
| 5.17 | 5.45 | 4.87 | 4.93 | -5.56% | |
| 5.27 | 5.49 | 5.06 | 5.22 | -0.19% | |
| 5.18 | 5.42 | 4.98 | 5.23 | +1.16% | |
| 5.10 | 5.34 | 4.95 | 5.17 | -0.58% | |
| 5.50 | 5.76 | 5.09 | 5.20 | -3.35% | |
| 5.84 | 5.95 | 5.30 | 5.38 | -5.94% | |
| 5.79 | 6.27 | 5.62 | 5.72 | -5.45% | |
| 6.06 | 6.35 | 6.00 | 6.05 | +0.33% | |
| 6.00 | 6.17 | 5.86 | 6.03 | +4.33% | |
| 5.77 | 6.19 | 5.71 | 5.78 | +1.94% | |
| 5.70 | 6.08 | 5.55 | 5.67 | -0.18% | |
| 6.05 | 6.18 | 5.62 | 5.68 | -0.87% | |
| 5.67 | 5.95 | 5.53 | 5.73 | +0.35% | |
| 5.38 | 5.71 | 5.21 | 5.71 | +7.33% | |
| 5.59 | 5.85 | 5.24 | 5.32 | -6.17% | |
| 6.19 | 6.34 | 5.30 | 5.67 | -6.90% | |
| 6.15 | 6.36 | 6.00 | 6.09 | +6.10% | |
| 7.04 | 7.19 | 5.70 | 5.74 | -16.81% | |
| 6.69 | 7.43 | 6.40 | 6.90 | +1.17% | |
| 6.50 | 7.01 | 6.32 | 6.82 | +4.28% | |
| 6.85 | 6.90 | 6.42 | 6.54 | -4.66% | |
| 6.04 | 6.95 | 6.02 | 6.86 | +10.47% | |
| 6.37 | 6.51 | 5.90 | 6.21 | -2.51% | |
| 6.40 | 6.72 | 6.27 | 6.37 | -3.04% | |
| 6.09 | 6.98 | 6.00 | 6.57 | +8.60% | |
| 5.80 | 6.39 | 5.75 | 6.05 | +5.40% | |
| 5.56 | 5.83 | 5.50 | 5.74 | +3.99% | |
| 5.29 | 5.54 | 5.29 | 5.52 | +4.15% | |
| 5.46 | 5.84 | 5.16 | 5.30 | -1.12% | |
| 6.08 | 6.11 | 5.35 | 5.36 | -15.59% | |
| 6.52 | 7.18 | 6.20 | 6.35 | -2.61% | |
| 5.99 | 6.64 | 5.55 | 6.52 | +4.82% | |
| 5.13 | 6.32 | 5.04 | 6.22 | +22.68% | |
| 3.85 | 5.19 | 3.85 | 5.07 | +19.86% | |
| 4.32 | 4.32 | 4.06 | 4.23 | -3.20% | |
| 3.67 | 4.59 | 3.65 | 4.37 | -5.62% | |
| 4.80 | 4.89 | 4.52 | 4.63 | -3.94% | |
| 5.22 | 5.29 | 4.71 | 4.82 | -9.91% | |
| 5.00 | 5.52 | 4.91 | 5.35 | +8.30% | |
| 4.98 | 5.00 | 4.60 | 4.94 | +0.41% | |
| 4.78 | 5.08 | 4.78 | 4.92 | -0.61% | |
| 4.78 | 5.20 | 4.77 | 4.95 | +3.56% | |
| 4.06 | 5.07 | 3.96 | 4.78 | +18.32% | |
| 4.23 | 4.25 | 3.96 | 4.04 | -3.81% | |
| 4.13 | 4.21 | 3.80 | 4.20 | -0.94% | |
| 4.27 | 4.39 | 4.10 | 4.24 | -1.17% | |
| 4.15 | 4.40 | 4.02 | 4.29 | +2.88% | |
| 4.28 | 4.42 | 3.93 | 4.17 | -3.47% | |
| 4.62 | 4.72 | 4.12 | 4.32 | -2.92% | |
| 4.94 | 4.94 | 4.36 | 4.45 | -8.62% | |
| 4.27 | 5.00 | 4.12 | 4.87 | +13.26% | |
| 3.95 | 4.47 | 3.86 | 4.30 | +11.11% | |
| 3.92 | 3.95 | 3.61 | 3.87 | -1.28% | |
| 3.90 | 4.12 | 3.71 | 3.92 | +3.43% | |
| 3.75 | 3.96 | 3.50 | 3.79 | +4.41% | |
| 2.87 | 3.80 | 2.87 | 3.63 | +27.37% | |
| 3.09 | 3.21 | 2.77 | 2.85 | -7.77% | |
| 2.67 | 3.23 | 2.67 | 3.09 | +12.77% | |
| 2.80 | 2.87 | 2.66 | 2.74 | +4.58% | |
| 2.65 | 2.65 | 2.47 | 2.62 | -1.50% | |
| 2.96 | 3.03 | 2.65 | 2.66 | -8.90% | |
| 2.85 | 3.03 | 2.75 | 2.92 | +5.04% | |
| 2.62 | 2.82 | 2.62 | 2.78 | +8.59% | |
| 2.53 | 2.67 | 2.49 | 2.56 | +4.07% | |
| 2.67 | 2.90 | 2.41 | 2.46 | -4.28% | |
| 2.61 | 2.67 | 2.45 | 2.57 | -1.91% | |
| 2.84 | 2.94 | 2.62 | 2.62 | -9.34% | |
| 3.15 | 3.15 | 2.60 | 2.89 | +5.09% | |
| 2.36 | 2.87 | 2.36 | 2.75 | +16.53% | |
| 2.24 | 2.45 | 2.19 | 2.36 | +5.83% | |
| 2.23 | 2.37 | 2.18 | 2.23 | +2.29% | |
| 2.09 | 2.25 | 2.06 | 2.18 | +9.00% | |
| 2.83 | 2.83 | 1.94 | 2.00 | -29.58% | |
| 2.76 | 2.97 | 2.74 | 2.84 | +3.27% | |
| 2.79 | 2.93 | 2.69 | 2.75 | -0.36% | |
| 2.81 | 2.95 | 2.63 | 2.76 | +1.85% | |
| 2.74 | 2.79 | 2.62 | 2.71 | -4.24% | |
| 2.80 | 2.88 | 2.66 | 2.83 | +0.71% | |
| 2.89 | 2.99 | 2.78 | 2.81 | -3.77% | |
| 2.82 | 2.95 | 2.82 | 2.92 | -2.01% | |
| 3.10 | 3.18 | 2.71 | 2.98 | -6.88% | |
| 3.26 | 3.34 | 3.06 | 3.20 | -3.03% | |
| 3.30 | 3.50 | 3.25 | 3.30 | +2.17% | |
| 3.36 | 3.37 | 3.15 | 3.23 | -6.38% | |
| 3.37 | 3.59 | 3.37 | 3.45 | -0.58% | |
| 3.78 | 3.78 | 3.37 | 3.47 | -10.34% | |
| 3.78 | 3.92 | 3.68 | 3.87 | +2.93% | |
| 3.72 | 3.86 | 3.67 | 3.76 | +2.17% | |
| 3.47 | 3.75 | 3.38 | 3.68 | +5.75% | |
| 3.50 | 3.58 | 3.43 | 3.48 | -1.69% | |
| 3.65 | 3.76 | 3.53 | 3.54 | -3.80% | |
| 3.49 | 3.68 | 3.37 | 3.68 | +4.55% | |
| 3.83 | 3.99 | 3.47 | 3.52 | -8.57% | |
| 3.85 | 3.87 | 3.62 | 3.85 | +1.05% | |
| 3.81 | 3.91 | 3.71 | 3.81 | +1.06% | |
| 3.93 | 4.00 | 3.71 | 3.77 | -3.33% | |
| 4.02 | 4.22 | 3.82 | 3.90 | +2.90% | |
| 3.87 | 3.92 | 3.69 | 3.79 | -2.57% | |
| 3.78 | 3.90 | 3.58 | 3.89 | +3.73% | |
| 3.58 | 4.00 | 3.58 | 3.75 | +7.14% | |
| 3.50 | 3.70 | 3.44 | 3.50 | -2.78% | |
| 3.86 | 3.86 | 3.45 | 3.60 | -5.26% | |
| 3.80 | 3.99 | 3.60 | 3.80 | +0.80% | |
| 3.73 | 3.91 | 3.65 | 3.77 | +0.80% | |
| 4.11 | 4.21 | 3.71 | 3.74 | -9.66% | |
| 4.06 | 4.20 | 3.95 | 4.14 | +0.24% | |
| 4.26 | 4.31 | 3.97 | 4.13 | -2.82% | |
| 4.29 | 4.44 | 4.10 | 4.25 | -1.16% | |
| 4.32 | 4.52 | 4.26 | 4.30 | -0.92% | |
| 4.76 | 4.76 | 4.31 | 4.34 | -8.82% | |
| 4.67 | 4.83 | 4.54 | 4.76 | +3.48% | |
| 4.56 | 4.95 | 4.44 | 4.60 | -2.95% | |
| 4.88 | 4.99 | 4.71 | 4.74 | -6.88% | |
| 5.00 | 5.18 | 5.00 | 5.09 | +2.00% | |
| 5.00 | 5.15 | 4.91 | 4.99 | +0.60% | |
| 4.94 | 5.06 | 4.83 | 4.96 | +0.61% | |
| 4.80 | 5.07 | 4.77 | 4.93 | +4.01% | |
| 4.63 | 4.81 | 4.50 | 4.74 | -0.42% | |
| 5.05 | 5.10 | 4.59 | 4.76 | -5.37% | |
| 4.39 | 5.15 | 4.39 | 5.03 | +13.29% | |
| 4.46 | 4.84 | 4.27 | 4.44 | +0.68% | |
| 5.67 | 5.72 | 4.23 | 4.41 | -20.40% | |
| 5.39 | 5.79 | 5.20 | 5.54 | +3.75% | |
| 5.04 | 5.40 | 4.96 | 5.34 | +8.10% | |
| 4.90 | 5.07 | 4.88 | 4.94 | +0.41% | |
| 5.07 | 5.12 | 4.90 | 4.92 | -3.34% | |
| 5.05 | 5.20 | 5.00 | 5.09 | -1.74% | |
| 5.29 | 5.34 | 5.06 | 5.18 | -2.81% | |
| 5.22 | 5.35 | 5.13 | 5.33 | +1.91% | |
| 5.05 | 5.28 | 5.02 | 5.23 | +2.35% | |
| 5.13 | 5.33 | 4.96 | 5.11 | +1.39% | |
| 4.72 | 5.50 | 4.62 | 5.04 | +7.23% | |
| 4.97 | 5.27 | 4.68 | 4.70 | -1.67% | |
| 5.30 | 5.39 | 4.64 | 4.78 | -10.49% | |
| 5.83 | 5.91 | 5.25 | 5.34 | -8.56% | |
| 6.30 | 6.30 | 5.81 | 5.84 | -3.15% | |
| 6.40 | 6.70 | 5.88 | 6.03 | -6.80% | |
| 6.51 | 6.54 | 6.08 | 6.47 | -1.37% | |
| 6.72 | 6.75 | 6.42 | 6.56 | -3.39% | |
| 6.74 | 6.85 | 6.59 | 6.79 | -0.88% | |
| 6.96 | 7.06 | 6.67 | 6.85 | -2.28% | |
| 7.34 | 7.48 | 6.91 | 7.01 | -3.97% | |
| 7.01 | 7.51 | 6.85 | 7.30 | +3.55% | |
| 6.49 | 7.10 | 6.31 | 7.05 | +9.47% | |
| 6.60 | 6.79 | 6.41 | 6.44 | -0.92% | |
| 7.26 | 7.33 | 6.48 | 6.50 | -12.87% | |
| 7.40 | 7.60 | 7.21 | 7.46 | +6.57% | |
| 6.95 | 7.22 | 6.75 | 7.00 | +1.74% | |
| 6.86 | 7.00 | 6.43 | 6.88 | +1.18% | |
| 6.73 | 7.10 | 6.50 | 6.80 | +4.62% | |
| 6.34 | 7.16 | 6.05 | 6.50 | +4.50% | |
| 6.43 | 6.80 | 5.97 | 6.22 | +0.97% | |
| 6.41 | 6.49 | 6.05 | 6.16 | -2.84% | |
| 6.05 | 6.63 | 5.98 | 6.34 | +1.77% | |
| 6.26 | 6.61 | 6.01 | 6.23 | -4.30% | |
| 6.60 | 7.06 | 6.26 | 6.51 | -6.20% | |
| 7.17 | 7.69 | 6.76 | 6.94 | -5.96% | |
| 8.13 | 8.18 | 6.93 | 7.38 | -3.91% | |
| 8.02 | 8.27 | 7.59 | 7.68 | -5.88% | |
| 8.65 | 9.00 | 8.09 | 8.16 | -1.81% | |
| 8.44 | 8.44 | 7.43 | 8.31 | +1.84% | |
| 8.77 | 9.00 | 7.94 | 8.16 | -7.48% | |
| 9.03 | 9.45 | 8.72 | 8.82 | -5.67% | |
| 9.44 | 9.78 | 9.01 | 9.35 | -3.91% | |
| 9.87 | 10.47 | 9.63 | 9.73 | -2.51% | |
| 9.75 | 10.29 | 9.09 | 9.98 | +4.07% | |
| 9.33 | 11.07 | 9.21 | 9.59 | +1.16% | |
| 8.31 | 9.64 | 8.28 | 9.48 | +14.63% | |
| 8.65 | 8.74 | 8.22 | 8.27 | -4.50% | |
| 9.00 | 9.18 | 8.53 | 8.66 | -0.92% | |
| 8.75 | 9.08 | 8.61 | 8.74 | +3.31% | |
| 8.68 | 8.82 | 8.32 | 8.46 | +0.48% | |
| 8.88 | 9.00 | 8.09 | 8.42 | -5.29% | |
| 8.80 | 9.25 | 8.42 | 8.89 | -0.78% | |
| 10.00 | 10.15 | 8.79 | 8.96 | -4.58% | |
| 10.00 | 10.47 | 8.29 | 9.39 | -9.36% | |
| 11.90 | 11.90 | 10.35 | 10.36 | -14.17% | |
| 10.20 | 12.07 | 9.90 | 12.07 | +26.65% | |
| 8.75 | 10.20 | 8.09 | 9.53 | +6.84% | |
| 8.38 | 9.20 | 8.18 | 8.92 | +12.34% | |
| 9.05 | 9.40 | 7.82 | 7.94 | -11.28% | |
| 8.59 | 9.29 | 8.59 | 8.95 | — |
Prices are adjusted for stock splits. See adjusted closing price for how dividends and splits affect history, and the TGEN chart for longer ranges.