Energy Recovery, Inc. (ERII) P/E Ratio History
Fairly ValuedTrading at 71.1x, near 5Y avg of 62.6x · 60th percentile · In line with own history · Data 2008–2026
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P/E Ratio Analysis
As of November 8, 2026, Energy Recovery, Inc. (ERII) trades at a price-to-earnings ratio of 71.1x, with a stock price of $7.15 and trailing twelve-month earnings per share of $0.10.
The current P/E is 14% above its 5-year average of 62.6x. 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 60th percentile of its historical range.
Compared to the Industrials sector median P/E of 22.3x, ERII trades at a 219% premium to its sector peers. The sector includes 417 companies with P/E ratios ranging from 0.0x to 193.8x.
Relative to the broader market, ERII commands a significant premium over the S&P 500 median P/E of 21.8x. 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
Water Infrastructure Equipment peers sorted by market cap
| Company | Market Cap | P/E Ratio | PEG Ratio | EPS Growth (1Y) |
|---|---|---|---|---|
| $4B | 21.2 | 2.48 | -17% | |
| $784M | 491.5 | - | +101%Best | |
| $2B | 19.9 | 0.74Best | +24% | |
| $11B | 17.8Lowest | 1.36 | +6% | |
| $23B | 21.2 | 0.93 | +7% | |
| $1B | 21.9 | 13.69 | -4% | |
| $436M | 26.7 | 2.00 | -36% | |
| $162B | 37.6 | - | -5% | |
| $91B | 33.8 | 7.37 | +19% |
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 Q3 | Sep 30 2026 | $6.67 | $0.09 | 74.1x | +4% |
| 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 | +10% |
| FY2023 Q2 | Jun 30 2023 | $27.95 | $0.18 | 151.9x | +114% |
| FY2023 Q1 | Mar 31 2023 | $23.05 | $0.17 | 134.4x | +89% |
| 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 | +274% |
| FY2017 Q1 | Mar 31 2017 | $8.32 | $0.05 | 162.8x | +129% |
| FY2016 Q4 | Dec 31 2016 | $10.35 | $0.02 | 490.5x | +591% |
| 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 | +35% |
| 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: 71.0x
ERII Chart Terminal
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Intrinsic Valuation
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Historical Returns
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Peer Comparison
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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 71.1x, based on TTM diluted EPS of $0.10. The 5-year average P/E is 62.6x and the historical range spans 26.5x to 151.9x.
Is ERII stock overvalued or undervalued?
ERII trades at 71.1x P/E, near its 5-year average of 62.6x. The 60th percentile ranking within the 26.5x–151.9x historical range places valuation within normal bounds.
Is ERII stock expensive?
ERII is fairly valued relative to its own history. The current P/E of 71.1x is near the 5-year average of 62.6x (60th percentile of historical 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 62.6x. The current P/E of 71.1x places the stock at the 60th 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 71.1x P/E versus the S&P 500 median of 21.8x. The 226% premium to the market typically reflects higher expected earnings growth or quality.
How does ERII's valuation compare to Industrials peers?
Energy Recovery, Inc. P/E of 71.1x compares to the Industrials sector median of 22.3x. The premium reflects expected growth above peers or stronger fundamentals. 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 71.1x 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 1.41%, the inverse of its 71.1x 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.