Energy Recovery, Inc. (ERII) Stock Price History
Historical prices from 2011 to 2026
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ERII Historical Performance
Short-Term Returns
ERII Stock Price Trajectory (2011–2026)
As of May 8, 2026, Energy Recovery, Inc. (ERII) trades at $9.43, representing a -37.3% return over the past year. The stock has delivered a -54.3% total return over five years (-14.5% CAGR), reflecting challenging market conditions.
The stock reached its all-time high of $30.76 on July 19, 2023. From this peak, ERII has corrected -69.3%, currently trading 31% below its 200-day moving average, suggesting potential weakness.
When compared to Industrials sector peers FELE (+16.1% 1Y), PUMP (+201.4% 1Y), and HLIO (+133.2% 1Y), ERII has underperformed the peer group average. Compare ERII vs FELE →
ERII Historical Price Data (2025–2026)
Showing 30 of 3,650 recordsLoading full history…
| Date | Open | High | Low | Close | Volume | Change % |
|---|---|---|---|---|---|---|
| 2026-05-07 | 10.88 | 11.07 | 9.30 | 9.43 | 3.61M | -18.78% |
| 2026-05-06 | 11.56 | 11.72 | 11.48 | 11.61 | 694K | +2.65% |
| 2026-05-05 | 11.18 | 11.48 | 11.07 | 11.31 | 469K | +2.82% |
| 2026-05-04 | 11.02 | 11.19 | 10.97 | 11.00 | 589K | -0.36% |
| 2026-05-01 | 11.11 | 11.16 | 10.85 | 11.04 | 786K | -0.27% |
| 2026-04-30 | 10.84 | 11.14 | 10.75 | 11.07 | 1.19M | +3.46% |
| 2026-04-29 | 11.07 | 11.11 | 10.62 | 10.70 | 551K | -3.52% |
| 2026-04-28 | 11.00 | 11.12 | 10.81 | 11.09 | 706K | +0.36% |
| 2026-04-27 | 11.30 | 11.47 | 11.04 | 11.05 | 849K | -2.04% |
| 2026-04-24 | 11.00 | 11.39 | 10.96 | 11.28 | 1.58M | +2.45% |
| 2026-04-23 | 10.90 | 11.14 | 10.75 | 11.01 | 629K | +1.85% |
| 2026-04-22 | 10.46 | 10.89 | 10.46 | 10.81 | 1.24M | +4.24% |
| 2026-04-21 | 10.73 | 10.86 | 10.22 | 10.37 | 680K | -0.86% |
| 2026-04-20 | 10.51 | 10.69 | 10.43 | 10.46 | 713K | -1.13% |
| 2026-04-17 | 10.66 | 10.79 | 10.51 | 10.58 | 1.70M | +1.24% |
| 2026-04-16 | 10.70 | 10.70 | 10.28 | 10.45 | 778K | -1.60% |
| 2026-04-15 | 10.51 | 10.89 | 10.51 | 10.62 | 916K | -5.93% |
| 2026-04-14 | 11.40 | 11.53 | 11.27 | 11.29 | 534K | -1.05% |
| 2026-04-13 | 11.11 | 11.49 | 11.05 | 11.41 | 810K | +2.70% |
| 2026-04-10 | 11.08 | 11.27 | 11.06 | 11.11 | 362K | +0.45% |
| 2026-04-09 | 10.79 | 11.11 | 10.67 | 11.06 | 843K | +3.17% |
| 2026-04-08 | 10.81 | 10.91 | 10.61 | 10.72 | 696K | +3.78% |
| 2026-04-07 | 10.28 | 10.45 | 10.25 | 10.33 | 468K | -0.86% |
| 2026-04-06 | 10.34 | 10.44 | 10.20 | 10.42 | 501K | +2.16% |
| 2026-04-02 | 10.07 | 10.41 | 9.85 | 10.20 | 1.09M | -0.20% |
| 2026-04-01 | 10.30 | 10.31 | 10.07 | 10.22 | 688K | +1.49% |
| 2026-03-31 | 9.97 | 10.10 | 9.82 | 10.07 | 849K | +2.65% |
| 2026-03-30 | 10.00 | 10.02 | 9.76 | 9.81 | 637K | -0.61% |
| 2026-03-27 | 9.85 | 9.98 | 9.76 | 9.87 | 524K | -0.70% |
| 2026-03-26 | 10.09 | 10.19 | 9.86 | 9.94 | 437K | -1.97% |
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View ValuationCompare ERII vs SPIR
Side-by-side business, growth, and profitability comparison vs Spire Global, Inc..
Start ComparisonERII — Frequently Asked Questions
Quick answers to the most common questions about buying ERII stock.
How has ERII stock performed recently?
ERII declined -37.3% over the past year, below its 5-year annualized CAGR of -14.5%. The stock trades below its 200-day moving average, reflecting the downtrend.
What is ERII's all-time high price?
Energy Recovery, Inc. reached $30.76 on 2023-07-19. The 52-week high is $18.32. Current 1-year return of -37.3% places the stock further from historical peaks.
Where can I download ERII historical price data?
This page provides ERII daily OHLCV data with 50-day MA, 200-day MA, and RSI indicators. Data spans 2011-2026, downloadable in CSV format.