Energy Recovery, Inc. (ERII) P/E Ratio History
Deep ValueTrading at 16.2x · 0th percentile of 5-year range · Significant discount to historical valuation · Data 2008–2026
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P/E Ratio Analysis
As of September 24, 2026, Energy Recovery, Inc. (ERII) trades at a price-to-earnings ratio of 16.2x, with a stock price of $6.80 and trailing twelve-month earnings per share of $0.30.
The current P/E is 74% below its 5-year average of 63.2x. Over the past five years, ERII's P/E has ranged from a low of 26.5x to a high of 151.9x, placing the current valuation at the 0th percentile of its historical range.
Compared to the Industrials sector median P/E of 26.2x, ERII trades at a 38% discount to its sector peers. The sector includes 397 companies with P/E ratios ranging from 0.1x to 194.2x.
Relative to the broader market, ERII trades at a notable discount to the S&P 500 median P/E of 25.3x. Investors should consider the company's growth prospects, competitive position, and earnings quality when evaluating whether the current valuation is justified.
For a comprehensive intrinsic value estimate using discounted cash flow analysis, see our ERII DCF Valuation Calculator →
Note: P/E ratio is just one valuation metric. It does not account for balance sheet strength, cash flow quality, or growth sustainability. Always conduct comprehensive due diligence before making investment decisions.
ERII Cross-Benchmark Valuation
How does the current P/E compare to sector peers and the broader market?
ERII P/E vs Peers
Filtration and Flow Control Components peers sorted by market cap
| Company | Market Cap | P/E Ratio | PEG Ratio | EPS Growth (1Y) |
|---|---|---|---|---|
| $4B | 29.9 | 3.51 | -17% | |
| $1B | 1256.4 | - | +101%Best | |
| $2B | 47.9 | 1.78 | +24% | |
| $9B | 14.0Lowest | 1.07Best | +6% | |
| $25B | 27.7 | 1.21 | +7% | |
| $999M | 22.7 | 14.21 | -4% | |
| $449M | 24.6 | 1.85 | -36% | |
| $156B | 44.0 | - | -5% | |
| $87B | 38.3 | 8.47 | +18% |
Lower P/E can signal a discount or weaker growth expectations; PEG adds growth context.
ERII Historical P/E Data (2008–2026)
Quarterly P/E ratios calculated from closing price and TTM EPS
| Quarter | Period End | Price | TTM EPS | P/E Ratio | vs Avg |
|---|---|---|---|---|---|
| FY2026 Q2 | - | $9.02 | $0.28 | 31.9x | -55% |
| FY2026 Q1 | - | $10.07 | $0.38 | 26.5x | -63% |
| FY2025 Q4 | Dec 31 2025 | $13.49 | $0.43 | 31.4x | -56% |
| FY2025 Q3 | - | $15.42 | $0.34 | 45.3x | -36% |
| FY2025 Q2 | Jun 30 2025 | $12.78 | $0.42 | 30.6x | -57% |
| FY2025 Q1 | Mar 31 2025 | $15.89 | $0.37 | 43.1x | -39% |
| FY2024 Q4 | - | $14.70 | $0.41 | 36.0x | -49% |
| FY2024 Q3 | Sep 30 2024 | $17.39 | $0.34 | 51.3x | -28% |
| FY2024 Q2 | Jun 30 2024 | $13.29 | $0.36 | 37.0x | -48% |
| FY2024 Q1 | Mar 31 2024 | $15.79 | $0.34 | 46.4x | -35% |
| FY2023 Q4 | Dec 31 2023 | $18.84 | $0.37 | 50.9x | -28% |
| FY2023 Q3 | Sep 30 2023 | $21.21 | $0.27 | 78.4x | +11% |
| FY2023 Q2 | Jun 30 2023 | $27.95 | $0.18 | 151.9x | +114% |
| FY2023 Q1 | Mar 31 2023 | $23.05 | $0.17 | 134.4x | +90% |
| FY2022 Q4 | Dec 31 2022 | $20.49 | $0.42 | 48.6x | -31% |
| FY2022 Q3 | Sep 30 2022 | $21.74 | $0.27 | 80.1x | +13% |
| FY2022 Q2 | - | $19.42 | $0.21 | 93.4x | +32% |
| FY2022 Q1 | - | $20.14 | $0.27 | 74.6x | +5% |
| FY2021 Q4 | Dec 31 2021 | $21.49 | $0.25 | 86.0x | +21% |
| FY2021 Q3 | - | $19.03 | $0.22 | 86.5x | +22% |
| FY2021 Q2 | Jun 30 2021 | $22.78 | $0.30 | 75.9x | +7% |
| FY2021 Q1 | Mar 31 2021 | $18.34 | $0.58 | 31.6x | -55% |
| FY2020 Q4 | - | $13.64 | $0.47 | 29.0x | -59% |
| FY2020 Q3 | Sep 30 2020 | $8.20 | $0.40 | 20.6x | -71% |
| FY2020 Q2 | - | $7.59 | $0.39 | 19.5x | -72% |
| FY2020 Q1 | - | $7.44 | $0.16 | 46.8x | -34% |
| FY2019 Q4 | - | $9.79 | $0.20 | 49.2x | -31% |
| FY2019 Q3 | Sep 30 2019 | $9.27 | $0.26 | 36.3x | -49% |
| FY2019 Q2 | Jun 30 2019 | $10.42 | $0.25 | 42.5x | -40% |
| FY2019 Q1 | Mar 31 2019 | $8.73 | $0.46 | 19.2x | -73% |
| FY2018 Q4 | Dec 31 2018 | $6.73 | $0.39 | 17.2x | -76% |
| FY2018 Q3 | Sep 30 2018 | $8.95 | $0.57 | 15.8x | -78% |
| FY2018 Q2 | Jun 30 2018 | $8.08 | $0.55 | 14.8x | -79% |
| FY2018 Q1 | Mar 31 2018 | $8.22 | $0.26 | 32.0x | -55% |
| FY2017 Q4 | Dec 31 2017 | $8.75 | $0.26 | 33.3x | -53% |
| FY2017 Q3 | Sep 30 2017 | $7.90 | $0.10 | 77.2x | +9% |
| FY2017 Q2 | Jun 30 2017 | $8.29 | $0.03 | 265.7x | +275% |
| FY2017 Q1 | Mar 31 2017 | $8.32 | $0.05 | 162.8x | +130% |
| FY2016 Q4 | Dec 31 2016 | $10.35 | $0.02 | 490.5x | +592% |
| FY2010 Q2 | Jun 30 2010 | $4.00 | $0.04 | 105.0x | +48% |
| FY2010 Q1 | Mar 31 2010 | $6.30 | $0.04 | 146.9x | +107% |
| FY2009 Q4 | - | $6.88 | $0.07 | 96.1x | +36% |
| FY2009 Q3 | Sep 30 2009 | $5.84 | $0.15 | 39.3x | -45% |
| FY2009 Q2 | - | $7.08 | $0.15 | 47.6x | -33% |
| FY2009 Q1 | - | $7.60 | $0.19 | 40.0x | -44% |
| FY2008 Q4 | Dec 31 2008 | $7.58 | $0.18 | 42.1x | -41% |
Average P/E for displayed period: 70.9x
ERII Chart Terminal
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Intrinsic Valuation
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Historical Returns
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Peer Comparison
Compare growth, multiples, and margins vs sector.
ERII — Frequently Asked Questions
Quick answers to the most common questions about buying ERII stock.
What is ERII's P/E ratio?
Energy Recovery, Inc. (ERII) trailing twelve-month P/E ratio is 16.2x, based on TTM diluted EPS of $0.30. The 5-year average P/E is 63.2x and the historical range spans 26.5x to 151.9x.
Is ERII stock overvalued or undervalued?
ERII trades at 16.2x P/E, below its 5-year average of 63.2x. At the 0th percentile of its historical range (26.5x–151.9x), the stock is priced at a discount to its own history.
Is ERII stock expensive?
No, ERII is not expensive on a historical basis. The current P/E of 16.2x is below the 5-year average of 63.2x and sits at the 0th percentile of its valuation range.
What is ERII's historical P/E range?
Over the past 5 years, ERII's P/E ratio has ranged from 26.5x to 151.9x, with a median of 50.9x and an average of 63.2x. The current P/E of 16.2x places the stock at the 0th percentile of this range. Full historical data spans 2008–2026.
How does ERII's P/E compare to the S&P 500?
ERII trades at 16.2x P/E versus the S&P 500 median of 25.3x. The 36% discount to the market suggests lower growth expectations or perceived higher risk.
How does ERII's valuation compare to Industrials peers?
Energy Recovery, Inc. P/E of 16.2x compares to the Industrials sector median of 26.2x. The discount suggests lower growth expectations, weaker margins, or higher perceived risk relative to peers. See the peer comparison table on this page for ticker-by-ticker P/E and PEG.
What is ERII's PEG ratio?
ERII PEG ratio is N/A, based on a P/E of 16.2x and EPS growth of 5.0%. PEG normalises P/E by growth and helps compare stocks with different earnings trajectories.
What is ERII's earnings yield?
ERII earnings yield is 6.18%, the inverse of its 16.2x P/E ratio. Earnings yield represents the percentage of each dollar invested that the company earns. It can be compared directly to bond yields to assess relative attractiveness of stocks versus fixed income.