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Tecogen Inc. (TGEN) Total Return Calculator with Dividends Reinvested

Tecogen Inc.

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The total return for Tecogen Inc. (TGEN) stock is +64.62% over the past 12 months. So far it's up 0.19% this year. The 5-year total return is +214.71%, meaning $10,000 invested in TGEN stock 5 years ago would be worth $31,471 today. Total return includes price appreciation plus reinvesting any dividends paid out.

If you invested $10,000 in TGEN 1 year ago, it would be worth $16,563 today — you'd have gained $6,563.

With Dividends Reinvested$16,563+65.63%

Price Only (No DRIP)$16,563+65.63%

Period2025-05-07 → 2026-05-06

Price

Total Return (DRIP)

S&P 500

If You Invested $10,000 in TGEN

1Y$16,462+$6,462 (+64.6%)64.6% CAGR

3Y$62,209+$52,209 (+522.1%)83.9% CAGR

5Y$31,471+$21,471 (+214.7%)25.8% CAGR

10Y$10,743+$743 (+7.4%)0.7% CAGR

15Y$8,399-$1,601 (-16.0%)-1.2% CAGR

20Y$8,399-$1,601 (-16.0%)-0.9% CAGR

30Y$8,399-$1,601 (-16.0%)-0.6% CAGR

Tecogen Inc. did not pay dividends during this period. Total return = price return.

Loading TGEN total return...

As of 2026-05-07

Returns at a Glance

Period	Total Return	CAGR	Price Only	Div. Contrib.	$10K →
YTD	+0.19%	—	+0.19%	—	$10,019
1Y	+64.62%	64.62%	+64.62%	—	$16,462
3Y	+522.09%	83.92%	+522.09%	—	$62,209
5Y	+214.71%	25.77%	+214.71%	—	$31,471
10Y	+7.43%	0.72%	+7.43%	—	$10,743
15Y	-16.01%	-1.16%	-16.01%	—	$8,399
20Y	-16.01%	-0.87%	-16.01%	—	$8,399
30Y	-16.01%	-0.58%	-16.01%	—	$8,399

Risk & Highlights

Best Year+218.71%2025

Worst Year-43.42%2020

Max Drawdown-83.26%2025-10-15 → 2026-03-18

Annual Returns

Year	Total Return	Price Return	Div.	S&P 500	vs S&P
2026YTD	-35.02%	-35.02%	—	+0.41%	-35.4pp
2025	+218.71%	+218.71%	—	+16.64%	+202.1pp
2024	+88.46%	+88.46%	—	+24.00%	+64.5pp
2023	-35.20%	-35.20%	—	+24.81%	-60.0pp
2022	+8.70%	+8.70%	—	-19.95%	+28.6pp

TGEN outperformed the S&P 500 by 33.29pp over the past year (+64.62% vs +31.32%).

Loading summary...

TGEN Peers' Total Return

Accurate peer set · 10 comparable names

Name	Mkt Cap	30D Rtn	YTD Total Rtn	1Y Total Rtn	Div Contrib	3Y Total Rtn	5Y Total Rtn	10Y Total Rtn
TGENTecogen Inc.	$133M	+101.1%	+0.2%	+64.6%	—	+522.1%	+214.7%	+7.4%
CDTXCidara Therapeutics, Inc.	$7.0B	—	+0.2%	+1023.8%	—	+944.2%	+448.0%	-14.7%
PESIPerma-Fix Environmental Services, Inc.	$218M	+2.6%	-3.8%	+34.6%	—	+28.3%	+62.7%	+200.4%
AMTXAemetis, Inc.	$221M	+4.2%	+103.8%	+159.2%	—	+42.7%	-80.5%	+12.1%
CLNEClean Energy Fuels Corp.	$491M	-9.7%	+3.7%	+43.6%	—	-47.9%	-77.1%	-28.9%
GNRCGenerac Holdings Inc.	$15.7B	+36.8%	+89.5%	+135.1%	—	+142.1%	-15.9%	+668.7%
FCELFuelCell Energy, Inc.	$674M	+92.1%	+56.8%	+242.5%	—	-82.1%	-94.6%	-99.4%
BLDPBallard Power Systems Inc.	$1.4B	+88.9%	+78.4%	+295.0%	—	+4.1%	-68.4%	+241.4%
PLUGPlug Power Inc.	$4.6B	+23.0%	+48.4%	+320.2%	—	-64.4%	-85.3%	+72.4%
AESThe AES Corporation	$10.2B	+0.1%	-0.9%	+44.1%	+6.7pp	-24.4%	-30.5%	+83.4%
NINiSource Inc.	$22.7B	+0.7%	+14.0%	+23.6%	+2.9pp	+78.4%	+104.3%	+141.5%

Compare:TGEN vs CDTX TGEN vs PESI TGEN vs AMTX TGEN vs CDTX vs PESI

About TGEN Dividend Returns

Tecogen Inc. (TGEN) does not currently pay dividends. Many growth-focused companies reinvest profits back into the business rather than distributing them as dividends.

How We Calculate Total Return

Our total return calculator simulates dividend reinvestment (DRIP) by assuming each dividend payment is used to purchase additional shares at the closing price on the ex-dividend date. This methodology provides an accurate representation of how a dividend reinvestment plan would perform.

Frequently Asked Questions

Q1What is the total return of TGEN over the past year?

Tecogen Inc. (TGEN) delivered a return of 64.62% over the past year. Since TGEN does not currently pay dividends, the total return equals the price-only return.

Q2How much would $10,000 invested in TGEN be worth today?

A $10,000 investment in Tecogen Inc. one year ago would be worth $16,462 today, representing a gain of $6,462.

Q3Does TGEN pay dividends?

Tecogen Inc. (TGEN) does not currently pay dividends. Many growth-focused companies reinvest profits back into the business rather than distributing them as dividends. For TGEN, the total return equals the price-only return.

Q4Did TGEN beat the S&P 500?

Yes, Tecogen Inc. (TGEN) outperformed the S&P 500 by 33.29 percentage points over the past year. TGEN delivered a total return of 64.62%, compared to the S&P 500's 31.32%. This 33.29pp alpha means investors in TGEN earned more than a passive S&P 500 index fund.

Q5What is TGEN's worst drawdown?

Tecogen Inc. (TGEN) experienced a maximum drawdown of -83.26% over the past year, declining from its peak on 2025-10-15 to its trough on 2026-03-18. The stock has not yet fully recovered to its prior peak. Maximum drawdown measures the worst peak-to-trough decline and is an important risk metric for investors.

Q6What is TGEN's long-term total return over 10, 20, or 30 years?

Here are Tecogen Inc. (TGEN)'s long-term returns with dividends reinvested. Over 10 years, the total return is 7.4% (0.7% CAGR) — $10,000 would have grown to $10,743. Over 20 years: -16.0% total return (-0.9% CAGR) — $10,000 → $8,399. Over 30 years: -16.0% total return (-0.6% CAGR) — $10,000 → $8,399. Long-term investors benefit from compounding: dividends buy additional shares, which generate their own dividends, creating an exponential growth effect.

Q7What was TGEN's best and worst year?

Tecogen Inc.'s best calendar year was 2025 with a total return of 218.7%. Its worst year was 2020 with a total return of -43.4%. This range shows the volatility investors should expect — the difference between the best and worst year is 262.1 percentage points.