ERII (Energy Recovery) Cyclically Adjusted Book per Share: $3.19 (As of Mar. 2026)


ERII Energy Recovery Inc ERII
71 GF Score
Price $8.79
GF Value $14.78
Valuation Significantly Undervalued
! 5 Warning Signs
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What is Energy Recovery Cyclically Adjusted Book per Share?

Energy Recovery ERII +0.34% 71 Cyclically Adjusted Book per Share is $3.19 as of Mar. 2026. GuruFocus rates ERII with a GF Score™ of 71/100 and a GF Value™ of $14.78 (Significantly Undervalued). The stock has 5 warning signs investors should review.

E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted Book per Share and the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted Book Value per Share of a company over the past 10 years.

Energy Recovery's adjusted book value per share for the three months ended in Mar. 2026 was $3.538. Add all the adjusted book value per share for the past 10 years together and divide the count will get our Cyclically Adjusted Book per Share, which is $3.19 for the trailing ten years ended in Mar. 2026.

During the past 12 months, Energy Recovery's average Cyclically Adjusted Book Growth Rate was 10.40% per year. During the past 3 years, the average Cyclically Adjusted Book Growth Rate was 9.60% per year. During the past 5 years, the average Cyclically Adjusted Book Growth Rate was 10.00% per year. During the past 10 years, the average Cyclically Adjusted Book Growth Rate was 5.90% per year. Please click Growth Rate Calculation Example (GuruFocus) to see how GuruFocus calculates Wal-Mart Stores Inc (WMT)'s revenue growth rate. You can apply the same method to get the Cyclically Adjusted Book Growth Rate using Cyclically Adjusted Book per Share data.

During the past 13 years, the highest 3-Year average Cyclically Adjusted Book Growth Rate of Energy Recovery was 10.00% per year. The lowest was 2.20% per year. And the median was 5.85% per year.

As of today (2026-06-27), Energy Recovery's current stock price is $8.79. Energy Recovery's Cyclically Adjusted Book per Share for the quarter that ended in Mar. 2026 was $3.19. Energy Recovery's Cyclically Adjusted PB Ratio of today is 2.76.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Energy Recovery was 12.17. The lowest was 2.51. And the median was 5.40.


Energy Recovery  (NAS:ERII) Cyclically Adjusted Book per Share Explanation

If a company grows much fast than inflation, Cyclically Adjusted Book per Share may underestimate the company's equity. Cyclically Adjusted PB Ratio can seem to be too high even the actual PB Ratio is low.

For the Cyclically Adjusted PB Ratio, the book value of the past 10 years are inflation-adjusted and averaged. The result is used for P/B calculation. Since it looks at the average over the last 10 years, the Cyclically Adjusted PB Ratio is also called CAPB Ratio.

The Shiller PE Ratio was first used by professor Robert Shiller. He uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings per share of a company over the past 10 years. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted book value per share of a company over the past 10 years.

Energy Recovery's Cyclically Adjusted PB Ratio of today is calculated as

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=8.79/3.19
=2.76

* 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.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Energy Recovery was 12.17. The lowest was 2.51. And the median was 5.40.


Be Aware

Cyclically Adjusted PB Ratio works better for cyclical companies. It gives you a better idea on the company's real book value.


Energy Recovery Cyclically Adjusted Book per Share Related Terms


Energy Recovery Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for Energy Recovery's Cyclically Adjusted Book per Share 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 Cyclically Adjusted Book per Share Chart

Energy Recovery Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Cyclically Adjusted Book per Share
Get a 7-Day Free Trial Premium Member Only Premium Member Only 2.11 2.34 2.54 2.81 3.08

Energy Recovery Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
Cyclically Adjusted Book per Share 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 2.89 2.96 3.03 3.08 3.19

ERII vs ARQ, FTEK, BCHT: Cyclically Adjusted Book per Share Comparison

For the Pollution & Treatment Controls subindustry, Energy Recovery's Cyclically Adjusted PB Ratio, along with its competitors' market caps and Cyclically Adjusted PB 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 Cyclically Adjusted PB Ratio vs Industrial Products Industry

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

* The bar in red indicates where Energy Recovery's Cyclically Adjusted PB Ratio falls into.


ERII
71GF Score
Energy Recovery Inc ERII
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Energy Recovery Cyclically Adjusted Book per Share Calculation

E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted Book per Share and the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted Book Value per Share of a company over the past 10 years.

What is Cyclically Adjusted Book per Share? How do we calculate Cyclically Adjusted Book per Share?

Cyclically Adjusted Book per Share is the average of the inflation adjusted Book Value per Share of a company over the past 10 years. Let's use an example to explain.

If we want to calculate the Cyclically Adjusted Book per Share of Wal-Mart (WMT) for Dec. 31, 2010, we need to have the inflation data and the book value per share from 2001 through 2010.

We adjusted the 2001 book value per share data with the total inflation from 2001 through 2010 to the equivalent book value in 2010. If the total inflation from 2001 to 2010 is 40%, and Wal-Mart's book value is $1 a share in 2001, then the 2001's equivalent book value in 2010 is $1.4 a share. If Wal-Mart's book value is $1 again in 2002, and the total inflation from 2002 through 2010 is 35%, then the equivalent 2002 book value in 2010 is $1.35. So on and so forth, you get the equivalent book value per share of past 10 years. Then you add them together and divided the sum by the count to get Cyclically Adjusted Book per Share.

Please note that we use the CPI data of the country/region where the company is headquartered. If the CPI data for that country/region is not available, then we will use the CPI data of the United States as default.

For example, Energy Recovery's adjusted Book Value per Share data for the three months ended in Mar. 2026 was:

Adj_Book= Book Value per Share /CPI of Mar. 2026 (Change)*Current CPI (Mar. 2026)
=3.538/330.2130*330.2130
=3.538

Current CPI (Mar. 2026) = 330.2130.

Energy Recovery Quarterly Data

Book Value per Share CPI Adj_Book
201606 1.114 241.018 1.526
201609 1.117 241.428 1.528
201612 1.225 241.432 1.675
201703 1.273 243.801 1.724
201706 1.223 244.955 1.649
201709 1.274 246.819 1.704
201712 1.705 246.524 2.284
201803 1.693 249.554 2.240
201806 1.913 251.989 2.507
201809 2.038 252.439 2.666
201812 2.102 251.233 2.763
201903 2.201 254.202 2.859
201906 2.322 256.143 2.993
201909 2.445 256.759 3.144
201912 2.461 256.974 3.162
202003 2.489 258.115 3.184
202006 2.827 257.797 3.621
202009 2.943 260.280 3.734
202012 3.046 260.474 3.862
202103 3.245 264.877 4.045
202106 3.146 271.696 3.824
202109 3.107 274.310 3.740
202112 3.146 278.802 3.726
202203 3.192 287.504 3.666
202206 2.901 296.311 3.233
202209 3.024 296.808 3.364
202212 3.305 296.797 3.677
202303 3.221 301.836 3.524
202306 3.223 305.109 3.488
202309 3.434 307.789 3.684
202312 3.864 306.746 4.160
202403 3.768 312.332 3.984
202406 3.805 314.175 3.999
202409 4.041 315.301 4.232
202412 3.833 315.605 4.010
202503 3.611 319.799 3.729
202506 3.450 322.561 3.532
202509 3.413 324.800 3.470
202512 3.905 324.054 3.979
202603 3.538 330.213 3.538

Add all the adjusted book value per share together and divide the count will get our Cyclically Adjusted Book per Share.

What does a Cyclically Adjusted Book per Share of $3.19 mean?
Energy Recovery (ERII) has a Cyclically Adjusted Book per Share of $3.19 as of Mar. 2026. Cyclically adjusted book value per share represents the company's inflation-adjusted book value per share over a 10-year period. View historical data on Energy Recovery and its competitors.
Is Energy Recovery's Cyclically Adjusted Book per Share too high?
Energy Recovery's current Cyclically Adjusted Book per Share is $3.19. Overall, Energy Recovery has a GF Score™ of 71/100 and is considered Significantly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Energy Recovery's Cyclically Adjusted Book per Share compare to ARQ and FTEK?
Energy Recovery's Cyclically Adjusted Book per Share of $3.19 can be compared against companies in the Industrial Products industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Cyclically Adjusted Book per Share for an Industrial Products company?
A good Cyclically Adjusted Book per Share depends on the Industrial Products industry context. However, Cyclically Adjusted Book per Share should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Cyclically Adjusted Book per Share mean?
A high Cyclically Adjusted Book per Share can signal that a stock is expensive relative to its fundamentals. Cyclically adjusted book value per share represents the company's inflation-adjusted book value per share over a 10-year period. View historical data on Energy Recovery and its competitors. Energy Recovery's current Cyclically Adjusted Book per Share is $3.19. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Energy Recovery stock overvalued right now?
Based on GuruFocus' analysis, Energy Recovery (ERII) is currently considered Significantly Undervalued. The stock's GF Value™ is $14.78, compared to a current price of $8.79 — trading 40.5% below its estimated fair value. The current Cyclically Adjusted Book per Share is $3.19. Energy Recovery's overall GF Score™ is 71/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Cyclically Adjusted Book per Share calculated?
Cyclically Adjusted Book per Share is calculated from a company's financial statements. For Energy Recovery (ERII), the current Cyclically Adjusted Book per Share is $3.19 as of Mar. 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.

Is Energy Recovery (ERII) Overvalued in 2026?

Based on GuruFocus' analysis, Energy Recovery stock appears to be undervalued. The current stock price of $8.79 is trading 40.5% below its estimated GF Value™ of $14.78. GuruFocus considers Energy Recovery to be Significantly Undervalued.

Key valuation signals for ERII:

  • Cyclically Adjusted Book per Share: $3.19
  • GF Value™: $14.78 vs. price of $8.79 (40.5% 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

Get the complete analysis for ERII

Cyclically Adjusted Book per Share is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

$8.79
Price
$14.78
GF Value