NYSE American · Electrical Equipment & Parts · USD

Tecogen Inc. (TGEN) Stock Analysis

Tecogen Inc. (TGEN) is a Electrical Equipment & Parts stock listed on NYSE American and quoted in US Dollar.

Last Updated: October 21, 2026

TGEN

$2.17

+$0.04 (+1.88%)

Oct 21, 2026 · Market close

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Price History

Hover for the daily close. The dotted line marks the period open.

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TGEN Key Statistics

As of Oct 21, 2026

Trading

Open: $2.17
Previous Close: $2.13
Day's Range: 2.11–2.28
52-Week Range: 1.94–11.07
Volume: 106.71K
Beta: 2.22

Valuation

Market Cap: $65.51M
P/E Ratio: unprofitable
Forward P/E: 14.47
P/S ratio: 2.66
EPS (ttm): −0.35

Financials (FY)

Revenue (FY): $27.07M+19.69%
Net Income (FY): −$8.25M
Profit margin: −42.28%
Shares Outstanding: 30.19M
1-Year Return: −75.59%

Dividend and dates

Earnings Date: November 12, 2026
Avg Volume: 177.86K

Only metrics the company reports are shown. Data provided by Yahoo Finance via yfinance. Updated daily.

Key facts

As of October 21, 2026, TGEN closed at $2.17, −75.59% over 1 year.

Tecogen Inc. (TGEN) has a market capitalization of $65.51M.

In fiscal 2025, TGEN reported revenue of $27.07M.

TGEN Stock Return by Calendar Year

Tecogen Inc. (TGEN) 10-year return: what $10,000 became

1 year: $10,000 $2,441; −75.59%
5 years: $10,000 $12,765; +27.65%
10 years: $10,000 $5,398; −46.02%

If you had invested $10,000 in Tecogen Inc. (TGEN) 10 years ago, at the close on October 21, 2016, it would have been worth $5,398 at the close on October 21, 2026: −46.02% in total, −5.98% a year. A historical calculation from closing prices adjusted for splits and dividends, before fees and taxes.

Calendar-year returns computed from daily closing prices. Partial years are shown muted and marked with an asterisk.

+237.20%−56.07%

2016*2017201820192020202120222023202420252026*

Year	Return
2026 (partial year)	−56.07%
2025	+237.20%
2024	+80.86%
2023	−35.20%
2022	+4.17%
2021	−1.64%
2020	−42.45%
2019	−41.60%
2018	+34.44%
2017	−35.71%
2016 (partial year)	−16.67%

As of October 21, 2026.

TGEN Revenue and Earnings by Fiscal Year

FY ends December

RevenueNet income

2022202320242025

Fiscal year	Revenue	Net income	Net margin
2025	$27.07M	−$8.25M	−30.5%
2024	$22.62M	−$4.76M	−21.0%
2023	$25.14M	−$4.60M	−18.3%
2022	$25.00M	−$2.45M	−9.8%

Fiscal year	Revenue	Gross profit	Operating income	Net income	Net margin
2025	$27.07M	$9.82M	−$7.13M	−$8.25M	−30.5%
2024	$22.62M	$9.87M	−$4.33M	−$4.76M	−21.0%
2023	$25.14M	$10.20M	−$4.45M	−$4.60M	−18.3%
2022	$25.00M	$11.07M	−$2.39M	−$2.45M	−9.8%

Annual figures as reported, in the company's reporting currency. As of December 31, 2025.

TGEN Valuation vs Electrical Equipment & Parts Median

Median of 56 stocks

Metric	TGEN	Electrical Equipment & Parts median	vs median
P/S ratio	2.66	2.01	33% above
Profit margin	−42.28%	−4.52%	37.8 pts below

Medians across 56 Electrical Equipment & Parts stocks that report the metric. Medians, not averages, so one outlier cannot move them. As of October 21, 2026.

Recent News

News provided by third-party sources. Not financial advice.

Analysis

Data-derived

Company Overview

Tecogen Inc. (TGEN) is capitalised at $65.51M on the latest close. The company sits in the Industrials sector, in the Electrical Equipment & Parts industry. Headcount on file is 119.

The 52-week range on file runs from $1.94 to $11.07. The most recent close on file for TGEN is $2.17, dated October 21, 2026. That is +$0.04 (+1.88%) against the previous close. The latest close sits 11.86% above that 52-week low.

Financial Health

In fiscal 2025, Tecogen Inc. reported revenue of $27.07M. Against the prior fiscal year total of $22.62M, that is a change of +19.69%. The same year closed with a net loss of $8.25M. Profit margin runs at −42.28%. That is 37.8 percentage points below the Electrical Equipment & Parts median of −4.52%. Trailing earnings per share are −0.35.

Across the 4 fiscal years on file, revenue moves from $25.00M in 2022 to $27.07M in 2025. Of those 4 years, 0 report positive net income.

Valuation Assessment

No trailing P/E applies: the last reported earnings figure is negative. The forward P/E on file is 14.47. The price-to-sales ratio is 2.66. On price-to-sales that is 32.85% above the Electrical Equipment & Parts median of 2.01. The medians here are taken across 56 Electrical Equipment & Parts companies that report the metric.

The trailing one-year total return is −75.59%. Measured over 10 years, that is −5.98% a year compounded. Beta against the wider market is reported at 2.22. Daily returns over the trailing 10 years annualize to a volatility of 86.76%.

Growth & Income

The record shows no dividend for TGEN.

So far in 2026 the total return is −56.07%. The strongest complete calendar year on file is 2025 at +237.20%; the weakest is 2020 at −42.45%. Of the 9 complete calendar years on file, 4 finished higher.

Peer Comparison

Tecogen Inc. (TGEN) operates in the Electrical Equipment & Parts industry. Here is how it compares to its closest peers by market capitalization:

Company	Ticker	Market Cap	P/E Ratio
Tecogen Inc.	TGEN	$65.51M	—
Vertiv Holdings Co	VRT	$81.68B	48.0
Bloom Energy Corporation	BE	$65.58B	293.0
Hubbell Incorporated	HUBB	$24.34B	27.3

The Electrical Equipment & Parts industry average P/E ratio is 33.0x. Tecogen Inc. has no P/E ratio because it is not currently profitable.

Every figure above is read from this page's own data on each daily rebuild. Informational only, not financial advice. As of October 21, 2026.

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About Tecogen Inc.

Tecogen Inc., together with its subsidiaries, designs, manufactures, markets, and maintains cogeneration products for multi-family residential, commercial, recreational, and industrial use in the United States. It operates in three segments: Products, Services, and Energy Production. The Products segment designs, manufactures, and sells industrial and commercial cogeneration systems to hospitals and nursing homes, schools and universities, health clubs and spas, hotels and motels, office and retail buildings, food and beverage processors, multi-unit residential buildings, laundries, ice rinks, swimming pools, factories, municipal buildings, indoor agriculture, military installations, and indoor growing facilities; and refrigeration compressors for cold storage, wineries, dairies, ice rinks, and food processing industries. Its Services segment provides operations and maintenance services; and parts sales, and installation services. The Energy Production segment installs, operates, and maintains distributed own generation electricity systems and sells the energy generated by such systems in the form of electricity, heat, hot water, and cooling to its customers under long-term energy sales agreements. The company also offers natural gas-powered cogeneration systems for water and space heating, and/or air conditioning. Its product portfolio includes InVerde e+ and TecoPower cogeneration units for the supply electricity and hot water; Tecochill, an air-conditioning and refrigeration chiller, and hybrid-drive air-cooled and gas engine-driven chiller to produce chilled water and hot water; Tecofrost, a gas engine-driven refrigeration compressor to circulate refrigerant and provide hot water as a byproduct; and Ultera, an emissions control technology. It sells its products through in-house marketing, as well as independent sales agents and representatives. Tecogen Inc. was incorporated in 2000 and is headquartered in North Billerica, Massachusetts.

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