Tecogen Inc. (TGEN) Stock Price History
Historical prices from 2014 to 2026
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TGEN Historical Performance
Short-Term Returns
TGEN Stock Price Trajectory (2014–2026)
As of May 8, 2026, Tecogen Inc. (TGEN) trades at $4.82, representing a +49.2% return over the past year. The stock has delivered a +180.2% total return over five years (+22.9% CAGR), reflecting significant long-term value creation.
The stock reached its all-time high of $31.31 on May 22, 2014. From this peak, TGEN has corrected -84.6%, currently trading 20% below its 200-day moving average, suggesting potential weakness.
When compared to Industrials sector peers CDTX (+1066.4% 1Y), PESI (+26.2% 1Y), and AMTX (+140.0% 1Y), TGEN has underperformed the peer group average. Compare TGEN vs CDTX →
TGEN Historical Price Data (2025–2026)
Showing 30 of 3,004 recordsLoading full history…
| Date | Open | High | Low | Close | Volume | Change % |
|---|---|---|---|---|---|---|
| 2026-05-07 | 5.22 | 5.29 | 4.71 | 4.82 | 362K | -9.91% |
| 2026-05-06 | 5.00 | 5.52 | 4.91 | 5.35 | 417K | +8.30% |
| 2026-05-05 | 4.98 | 5.00 | 4.60 | 4.94 | 269K | +0.41% |
| 2026-05-04 | 4.78 | 5.08 | 4.78 | 4.92 | 379K | -0.61% |
| 2026-05-01 | 4.78 | 5.20 | 4.77 | 4.95 | 528K | +3.56% |
| 2026-04-30 | 4.06 | 5.07 | 3.96 | 4.78 | 1.14M | +18.32% |
| 2026-04-29 | 4.23 | 4.25 | 3.96 | 4.04 | 207K | -3.81% |
| 2026-04-28 | 4.13 | 4.21 | 3.80 | 4.20 | 289K | +0.48% |
| 2026-04-27 | 4.27 | 4.39 | 4.10 | 4.18 | 134K | -2.56% |
| 2026-04-24 | 4.15 | 4.40 | 4.02 | 4.29 | 177K | +2.88% |
| 2026-04-23 | 4.28 | 4.42 | 3.93 | 4.17 | 362K | -3.47% |
| 2026-04-22 | 4.62 | 4.72 | 4.12 | 4.32 | 515K | -2.92% |
| 2026-04-21 | 4.94 | 4.94 | 4.36 | 4.45 | 548K | -8.62% |
| 2026-04-20 | 4.27 | 5.00 | 4.12 | 4.87 | 1.39M | +13.26% |
| 2026-04-17 | 3.95 | 4.47 | 3.86 | 4.30 | 1.20M | +11.11% |
| 2026-04-16 | 3.92 | 3.95 | 3.61 | 3.87 | 454K | -1.28% |
| 2026-04-15 | 3.90 | 4.12 | 3.71 | 3.92 | 629K | +3.43% |
| 2026-04-14 | 3.75 | 3.96 | 3.50 | 3.79 | 999K | +4.41% |
| 2026-04-13 | 2.87 | 3.80 | 2.87 | 3.63 | 1.31M | +27.37% |
| 2026-04-10 | 3.09 | 3.21 | 2.77 | 2.85 | 267K | -7.77% |
| 2026-04-09 | 2.67 | 3.23 | 2.67 | 3.09 | 634K | +12.77% |
| 2026-04-08 | 2.80 | 2.87 | 2.66 | 2.74 | 255K | +4.58% |
| 2026-04-07 | 2.65 | 2.65 | 2.47 | 2.62 | 190K | -1.50% |
| 2026-04-06 | 2.96 | 3.03 | 2.65 | 2.66 | 352K | -8.90% |
| 2026-04-02 | 2.85 | 3.02 | 2.75 | 2.92 | 307K | +5.04% |
| 2026-04-01 | 2.62 | 2.82 | 2.62 | 2.78 | 265K | +8.59% |
| 2026-03-31 | 2.53 | 2.67 | 2.49 | 2.56 | 225K | +4.07% |
| 2026-03-30 | 2.67 | 2.90 | 2.41 | 2.46 | 258K | -4.28% |
| 2026-03-27 | 2.61 | 2.67 | 2.45 | 2.57 | 399K | -1.91% |
| 2026-03-26 | 2.84 | 2.94 | 2.62 | 2.62 | 345K | -9.34% |
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Start ComparisonTGEN — Frequently Asked Questions
Quick answers to the most common questions about buying TGEN stock.
How has TGEN stock performed recently?
TGEN returned +49.2% over the past year, beating its 5-year annualized CAGR of +22.9%. The stock trades below its 200-day moving average, confirming the uptrend.
What is TGEN's all-time high price?
Tecogen Inc. reached $31.31 on 2014-05-22. The 52-week high is $12.07. Current 1-year return of +49.2% places the stock closer to historical peaks.
Where can I download TGEN historical price data?
This page provides TGEN daily OHLCV data with 50-day MA, 200-day MA, and RSI indicators. Data spans 2014-2026, downloadable in CSV format.