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The series is stated in the current share scale after splits; dividends are not included in the price
Tecogen Inc. trades on NYSE American under the ticker TGEN. The company belongs to the Industrials sector. The trading history on this page starts on 22 August 2016.
Over the past 52 weeks TGEN has traded between 1.94 $ and 12.07 $. As of 09 October 2026 the price stood 5.23 % of the way from the 52-week low to the high.
Over one year TGEN shares fell 73.09 %; over six months they fell 20.06 %. Volatility over 90 days is 78.28 %. Dividends are not included: this is price change only, as of 09 October 2026.
The company reported a loss over the last four quarters, so a price-to-earnings ratio is not calculated. Price to sales is 2.9, above the sector median of 1.3. Price to book is 3.8, above the sector median of 2.6. Calculated from reports for the period ending 31 March 2026.
| Date | Open | High | Low | Close | Volume, shares |
|---|---|---|---|---|---|
| 08 October 2026 | 2.73 | 2.77 | 2.35 | 2.47 | 254,100 |
| 07 October 2026 | 2.66 | 2.82 | 2.60 | 2.76 | 245,300 |
| 06 October 2026 | 2.58 | 2.77 | 2.51 | 2.68 | 86,000 |
| 05 October 2026 | 2.65 | 2.68 |
Based on the last 12 months of reports, through 31 March 2026
The sector median covers every company in the sector on the US market, loss-making ones included.
Address:76 TREBLE COVE ROAD BLDG. 1, NORTH BILLERICA, MA, 01862, US
Tecogen Inc. reported revenue of 26M $ and a net loss of 10M $ over the last four quarters. Net margin is −37.16 %. Revenue changed by +10.21 % year over year. Earnings per share are −0.34 $. Market capitalisation is 75M $.
TGEN has a return on equity of −49.26 %, below the sector median of 5.92 %. Return on assets is −28.17 %, below the sector median of 2.51 %. Operating margin is −37.45 %, below the sector median of 4.32 %.
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| 2.51 |
| 2.54 |
| 105,100 |
| 02 October 2026 | 2.71 | 2.78 | 2.63 | 2.65 | 91,400 |
| 01 October 2026 | 2.85 | 2.91 | 2.63 | 2.65 | 182,900 |
| 30 September 2026 | 3.02 | 3.10 | 2.73 | 2.84 | 375,600 |
| 29 September 2026 | 3.19 | 3.31 | 2.95 | 2.95 | 286,100 |
| 28 September 2026 | 3.00 | 3.24 | 2.98 | 3.16 | 124,100 |
| 25 September 2026 | 3.05 | 3.20 | 2.95 | 3.05 | 64,400 |
| 24 September 2026 | 3.14 | 3.28 | 3.02 | 3.02 | 93,800 |
| 23 September 2026 | 3.30 | 3.33 | 3.10 | 3.15 | 99,800 |
| 22 September 2026 | 3.30 | 3.38 | 3.19 | 3.32 | 129,400 |
| 21 September 2026 | 3.23 | 3.33 | 3.11 | 3.31 | 198,600 |
| 18 September 2026 | 3.10 | 3.18 | 3.01 | 3.12 | 82,400 |
| 17 September 2026 | 3.05 | 3.15 | 2.99 | 3.11 | 120,200 |
| 16 September 2026 | 2.97 | 3.05 | 2.89 | 2.94 | 62,500 |
| 15 September 2026 | 3.02 | 3.03 | 2.92 | 2.97 | 76,100 |
| 14 September 2026 | 2.97 | 3.05 | 2.91 | 3.01 | 99,100 |
| 11 September 2026 | 3.12 | 3.18 | 3.01 | 3.05 | 85,800 |