NYSE American · TGEN · stock
Tecogen INC. (TGEN) stock price history
Every NYSE American trading session of Tecogen INC. from May 20, 2014 to Nov 11, 2026: 3,140 daily bars, adjusted for splits and dividends, with minute bars from Jul 13, 2026 forward. The full series is served by the API: a free key covers the last year, paid plans the whole history and minute bars.
TGEN adjusted close, 2014 to 2026
- $20.80
- All time high, 2014
- $8.27
- 52 week high, $1.50 low
- 3,140
- Daily sessions since 2014
Last updated Nov 11, 2026, the last stored session. Refreshes after each trading day. Full 2014 to 2026 series and minute bars.
TGEN key facts
- Tecogen INC. (TGEN) closed at $1.70 on Nov 11, 2026 on NYSE American.
- TGEN's all time high close is $20.80, set on May 22, 2014; its all time low close is $0.6300 on Apr 19, 2024.
- TGEN's 52 week range is $1.50 to $8.27.
- TGEN returned -77.9% over the year to Nov 11, 2026 and -0.3% over five years.
- Over ten years TGEN returned -60%, -8.8% a year compounded.
- TGEN's deepest drawdown was -97.0% from May 22, 2014 to Apr 19, 2024.
- DataCedar holds 3,140 daily sessions of TGEN history from May 20, 2014 and minute bars from Jul 13, 2026, adjusted for splits and dividends, served by the API under a key.
TGEN price chart, 2014 to 2026
TGEN returns
Price return from the last close on or before the window start to Nov 11, 2026, on adjusted closes.
| Period | Return |
|---|---|
| 1 month | -29.8% |
| 3 months | -58.1% |
| 6 months | -61.1% |
| Year to date | -65.4% |
| 1 year | -77.9% |
| 3 years | +104.6% |
| 5 years | -0.3% |
| 10 years | -60.0% |
| Since May 20, 2014 | -73.3% |
| Compound annual growth, 12.5 years | -10.0% |
TGEN records
Measured on the stored closes; every figure is reproducible from the API series.
- All time high close
- $20.80 on May 22, 2014
- All time low close
- $0.6300 on Apr 19, 2024
- 52 week high
- $8.27 on Nov 11, 2025
- 52 week low
- $1.50 on Nov 5, 2026
- Deepest drawdown
- -97.0% from May 22, 2014 to Apr 19, 2024, not yet recovered
- Best single session
- +132.3% on May 21, 2014
- Worst single session
- -35.4% on May 23, 2014
- Volatility, 1 year annualised
- 104.4%
- Sessions closing higher, 1 year
- 45%
- Best calendar year
- 2025, +237%
- Worst calendar year
- 2020, -42%
TGEN price history by year
Open is the first session's open, high and low span the year, close is the last session's close, and the return is close over the previous year's close. 2014 starts on May 20, 2014; 2026 runs to Nov 11, 2026.
| Year | Open | High | Low | Close | Return | Volume | Sessions |
|---|---|---|---|---|---|---|---|
| 2026 | $5.04 | $7.43 | $1.50 | $1.70 | -65.6% | 79.8M | 217 |
| 2025 | $1.48 | $12.07 | $1.40 | $4.94 | +237.2% | 137.8M | 250 |
| 2024 | $0.7800 | $1.98 | $0.5850 | $1.47 | +80.9% | 5.7M | 252 |
| 2023 | $1.25 | $1.29 | $0.7000 | $0.8100 | -35.2% | 2.1M | 250 |
| 2022 | $1.25 | $1.80 | $0.7000 | $1.25 | +4.2% | 2M | 251 |
| 2021 | $1.14 | $2.58 | $1.03 | $1.20 | -1.6% | 4.1M | 252 |
| 2020 | $2.17 | $2.49 | $0.6000 | $1.22 | -42.5% | 13.7M | 253 |
| 2019 | $3.65 | $4.20 | $2.03 | $2.12 | -41.6% | 4M | 252 |
| 2018 | $2.65 | $4.20 | $2.05 | $3.63 | +34.4% | 5.2M | 251 |
| 2017 | $4.20 | $4.35 | $2.20 | $2.70 | -35.7% | 5M | 251 |
| 2016 | $3.50 | $6.50 | $2.80 | $4.20 | +20.0% | 2.2M | 252 |
| 2015 | $5.25 | $5.65 | $2.46 | $3.50 | -33.0% | 1.6M | 252 |
| 2014 | $5.96 | $31.31 | $4.59 | $5.22 | n/a | 5M | 157 |
TGEN monthly closes, last 12 months
| Month | Month end close | Change |
|---|---|---|
| November 2026 | $1.70 | -14.6% |
| October 2026 | $1.99 | -29.9% |
| September 2026 | $2.84 | -7.2% |
| August 2026 | $3.06 | -7.8% |
| July 2026 | $3.32 | -36.4% |
| June 2026 | $5.22 | -15.9% |
| May 2026 | $6.21 | +29.9% |
| April 2026 | $4.78 | +86.7% |
| March 2026 | $2.56 | -26.2% |
| February 2026 | $3.47 | -7.2% |
| January 2026 | $3.74 | -24.3% |
| December 2025 | $4.94 | -33.8% |
About the TGEN data
Daily bars. 3,140 sessions from May 20, 2014 to Nov 11, 2026, one row per NYSE American trading day with open, high, low, close and volume. Prices are adjusted for splits and cash dividends so the series is comparable across its whole length; the API also serves the raw, split only and dividend only views.
Minute bars. Stored from Jul 13, 2026 forward, most recent session Oct 23, 2026. Minute history is captured from the day collection began and is never backfilled, so this start date is exact. Five minute, fifteen minute and hourly bars are derived from these minutes.
Time and currency. Session dates are NYSE American trading days; minute timestamps are UTC. Prices are in USD. Volume is shares traded on the session.
Get the data. The REST endpoint returns the daily series as JSON with pagination; a free key serves the last year, Quant and above the full history back to May 20, 2014, and minute bars come with the paid windows. It takes timeframe (1Min, 5Min, 15Min, 1Hour, 1Day), adjustment, start and end. See the bars endpoint and authentication, and pricing for the plan windows.
curl "https://api.datacedar.com/v3/stocks/nyse-american%3ATGEN/bars?timeframe=1Day&adjustment=all&limit=50000" \
-H "X-API-Key: YOUR_KEY"Nearby on NYSE American
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Common questions
TGEN share price history
