ERII (Energy Recovery) PEG Ratio: N/A (As of Jun. 26, 2026)


ERII Energy Recovery Inc ERII
71 GF Score
Price $8.82
GF Value $14.78
Valuation Significantly Undervalued
! 5 Warning Signs
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What is Energy Recovery PEG Ratio?

PE Ratio without NRI / 5-Year EBITDA Growth Rate*

PEG Ratio is defined as the PE Ratio without NRI divided by the growth ratio. The growth rate we use is the 5-Year EBITDA growth rate. As of today, Energy Recovery's PE Ratio without NRI is 20.51. Energy Recovery's 5-Year EBITDA growth rate is -2.40%. Therefore, Energy Recovery's PEG Ratio for today is N/A.

* The 5-Year EBITDA Growth Rate is the 5-year average EBITDA per share growth rate. While the denominator is a percentage, we use the whole number as opposed to the decimal form for the calculation. For example, 5% would be shown as 5 as opposed to 0.05. If it's smaller than or equal to 0, then the PEG Ratio is not calculated.


The historical rank and industry rank for Energy Recovery's PEG Ratio or its related term are showing as below:


During the past 13 years, Energy Recovery's highest PEG Ratio was 146.70. The lowest was 1.08. And the median was 6.52.


ERII's PEG Ratio is not ranked *
in the Industrial Products industry.
Industry Median: 1.87
* Ranked among companies with meaningful PEG Ratio only.

Peter Lynch thinks a company with a P/E ratio equal to its growth rate is fairly valued.


Energy Recovery  (NAS:ERII) PEG Ratio Explanation

To compare stocks with different growth rates, Peter Lynch invented a ratio called PEG Ratio. PEG Ratio is defined as the P/E ratio divided by the growth ratio. He thinks a company with a P/E ratio equal to its growth rate is fairly valued. Still he said he would rather buy a company growing 20% a year with a P/E of 20, instead of a company growing 10% a year with a P/E of 10.


Energy Recovery PEG Ratio Related Terms


Energy Recovery PEG Ratio Historical Data

* Premium members only.

The historical data trend for Energy Recovery's PEG Ratio can be seen below:

* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD.
* For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.

Energy Recovery PEG Ratio Chart

Energy Recovery Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
PEG Ratio
Get a 7-Day Free Trial Premium Member Only Premium Member Only 3.53 3.89 154.30 0.00 0.00

Energy Recovery Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
PEG Ratio Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only 0.00 0.00 0.00 0.00 7.68

ERII vs ARQ, FTEK, BCHT: PEG Ratio Comparison

For the Pollution & Treatment Controls subindustry, Energy Recovery's PEG Ratio, along with its competitors' market caps and PEG Ratio data, can be viewed below:

* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.


Energy Recovery PEG Ratio vs Industrial Products Industry

For the Industrial Products industry and Industrials sector, Energy Recovery's PEG Ratio distribution charts can be found below:

* The bar in red indicates where Energy Recovery's PEG Ratio falls into.


ERII
71GF Score
Energy Recovery Inc ERII
PEG Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
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Energy Recovery PEG Ratio Calculation

PEG Ratio is defined as the PE Ratio without NRI divided by the growth ratio. The ratio we use is the 5-Year EBITDA growth rate.

Energy Recovery's PEG Ratio for today is calculated as

PEG Ratio=PE Ratio without NRI/5-Year EBITDA Growth Rate*
=20.511627906977/-2.40
=N/A

* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD.
* For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.

* Note: The 5-Year EBITDA Growth Rate is the 5-year average EBITDA per share growth rate. While the denominator is a percentage, we use the whole number as opposed to the decimal form for the calculation. For example, 5% would be shown as 5 as opposed to 0.05. If it's smaller than or equal to 0, then the PEG Ratio is not calculated.

Is Energy Recovery (ERII) Overvalued in 2026?

Based on GuruFocus' analysis, Energy Recovery stock appears to be undervalued. The current stock price of $8.82 is trading 40.3% below its estimated GF Value™ of $14.78. GuruFocus considers Energy Recovery to be Significantly Undervalued.

Key valuation signals for ERII:

  • PEG Ratio: N/A
  • GF Value™: $14.78 vs. price of $8.82 (40.3% below fair value)
  • GF Score™: 71/100 with 5 warning signs

No single metric tells the full story. See the ERII stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Energy Recovery Business Description

Other Exchanges 5E2:Germany
Address 1717 Doolittle Drive, San Leandro, CA, USA, 94577
Energy Recovery Inc designs and manufactures energy-saving technologies. The firm uses its proprietary pressure exchanger technology to help customers in multiple industries improve their operations and lower their emissions. Using its proprietary technology, it offers energy recovery devices, including pressure exchangers, pumps, and turbochargers, mainly used for seawater desalination and wastewater treatment. Additionally, the company is involved in the development of emerging technologies, such as the PX G1300 used in industrial and commercial refrigeration applications. The firm's reportable operating segments are: Water, which generates maximum revenue, and Emerging Technologies. Geographically, it generates maximum revenue from the Middle East, and the rest from other markets.
71GF Score

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PEG Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

$8.82
Price
$14.78
GF Value