Energy Recovery, Inc. (ERII) P/E Ratio History
Historical price-to-earnings valuation from 2008 to 2026
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ERII Valuation Context
How does the current P/E compare to historical and market benchmarks?
P/E Ratio Analysis
The current P/E is 65% below its 5-year average of 64.9x. Over the past five years, ERII's P/E has ranged from a low of 16.5x to a high of 151.9x, placing the current valuation at the 5th percentile of its historical range.
Compared to the Industrials sector median P/E of 25.5x, ERII is roughly in line with its sector peers. The sector includes 413 companies with P/E ratios ranging from 0.0x to 185.3x.
Relative to the broader market, ERII trades roughly in line with the S&P 500 median P/E of 25.1x. 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 P/E vs Peers
P/E ratio compared to closely matched public peers
| Company | Market Cap | P/E Ratio | PEG Ratio | EPS Growth (1Y) |
|---|---|---|---|---|
| $4B | 30.8 | 3.53 | -16% | |
| $2B | 1993.6 | - | +101%Best | |
| $2B | 46.9 | 1.74 | +24% | |
| $13B | 19.9Lowest | 1.52 | +6% | |
| $27B | 29.5 | 1.29Best | +7% | |
| $955M | 21.8 | 13.62 | -4% | |
| $124B | 34.9 | - | -5% | |
| $79B | 34.9 | 7.73 | +18% |
Peers sorted by market capitalization. P/E below peers may indicate undervaluation or lower growth expectations. Consider PEG ratio for growth-adjusted comparison.
ERII Historical P/E Data (2008–2026)
Quarterly P/E ratios calculated from closing price and TTM EPS
| Quarter | Date | Price | TTM EPS | P/E Ratio | vs Avg |
|---|---|---|---|---|---|
| FY2026 Q1 | $10.07 | $0.61 | 16.5x | -77% | |
| FY2025 Q4 | Wed Dec 31 2025 00:00:00 GM | $13.49 | $0.43 | 31.4x | -56% |
| FY2025 Q3 | $15.42 | $0.34 | 45.3x | -37% | |
| FY2025 Q2 | Mon Jun 30 2025 00:00:00 GM | $12.78 | $0.42 | 30.6x | -57% |
| FY2025 Q1 | Mon Mar 31 2025 00:00:00 GM | $15.89 | $0.37 | 43.1x | -40% |
| FY2024 Q4 | $14.70 | $0.41 | 36.0x | -50% | |
| FY2024 Q3 | Mon Sep 30 2024 00:00:00 GM | $17.39 | $0.34 | 51.3x | -28% |
| FY2024 Q2 | Sun Jun 30 2024 00:00:00 GM | $13.29 | $0.36 | 37.0x | -48% |
| FY2024 Q1 | Sun Mar 31 2024 00:00:00 GM | $15.79 | $0.34 | 46.4x | -35% |
| FY2023 Q4 | Sun Dec 31 2023 00:00:00 GM | $18.84 | $0.37 | 50.9x | -29% |
| FY2023 Q3 | Sat Sep 30 2023 00:00:00 GM | $21.21 | $0.27 | 78.4x | +10% |
| FY2023 Q2 | Fri Jun 30 2023 00:00:00 GM | $27.95 | $0.18 | 151.9x | +112% |
Average P/E for displayed period: 71.5x
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Start ComparisonERII — Frequently Asked Questions
Quick answers to the most common questions about buying ERII stock.
Is ERII stock overvalued or undervalued?
ERII trades at 22.5x P/E, below its 5-year average of 64.9x. At the 5th percentile of historical range, the stock is priced at a discount to its own history.
How does ERII's valuation compare to peers?
Energy Recovery, Inc. P/E of 22.5x compares to sector median of 25.5x. The discount suggests lower growth expectations or higher risk.
What is ERII's PEG ratio?
ERII PEG ratio is N/A. Above 2.0 indicates premium valuation relative to growth rate. Historical P/E data spans 2008-2026.