Energy Recovery, Inc. (ERII) Stock Price History
Historical prices from 2008 to 2026
- 1M
- +4.0%
- 3M
- -4.9%
- YTD
- -31.3%
- 1Y
- -22.7%
- 3Y
- -30.0%
- 5Y
- -14.0%
Loading 10-year price history...
ERII Historical Performance
ERII Annual Returns
Year-by-year price performance · 2008–2026
- 2008 annual price return
- -22.9%
- 2009 annual price return
- -13.5%
- 2010 annual price return
- -49.2%
- 2011 annual price return
- -37.8%
- 2012 annual price return
- +29.3%
- 2013 annual price return
- +62.3%
- 2014 annual price return
- -1.9%
- 2015 annual price return
- +35.7%
- 2016 annual price return
- +50.0%
- 2017 annual price return
- -18.8%
- 2018 annual price return
- -24.6%
- 2019 annual price return
- +42.5%
- 2020 annual price return
- +40.0%
- 2021 annual price return
- +56.3%
- 2022 annual price return
- -4.7%
- 2023 annual price return
- -8.6%
- 2024 annual price return
- -22.1%
- 2025 annual price return
- -9.4%
- 2026 annual price return
- -24.0%
ERII Stock Price Trajectory (2008–2026)
As of June 22, 2026, Energy Recovery, Inc. (ERII) trades at $9.42, representing a -22.7% return over the past year. The stock has delivered a -53.0% total return over five years (-14.0% 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 -69.4%, currently trading 27% below its 200-day moving average, suggesting potential weakness.
When compared to Industrials sector peers FELE (+21.5% 1Y), PUMP (+121.8% 1Y), and HLIO (+184.2% 1Y), ERII has underperformed the peer group average. Compare ERII vs FELE →
ERII Historical Price Data · from 2008
Rows 1–50 of 4,520| Date | Open | High | Low | Close | Volume | Change % |
|---|---|---|---|---|---|---|
| 2026-06-18 | 9.54 | 9.91 | 9.16 | 9.42 | 2.85M | +4.78% |
| 2026-06-17 | 8.60 | 9.67 | 8.57 | 8.99 | 2.25M | +4.78% |
| 2026-06-16 | 8.76 | 9.06 | 8.54 | 8.58 | 1.43M | -2.05% |
| 2026-06-15 | 8.43 | 9.06 | 8.43 | 8.76 | 2.04M | +5.16% |
| 2026-06-12 | 8.19 | 8.41 | 8.15 | 8.33 | 719K | +1.71% |
| 2026-06-11 | 7.97 | 8.24 | 7.83 | 8.19 | 820K | +3.41% |
| 2026-06-10 | 8.12 | 8.12 | 7.89 | 7.92 | 483K | -2.46% |
| 2026-06-09 | 8.07 | 8.29 | 7.96 | 8.12 | 663K | +1.88% |
| 2026-06-08 | 8.03 | 8.15 | 7.83 | 7.97 | 661K | -0.50% |
| 2026-06-05 | 8.29 | 8.30 | 8.01 | 8.01 | 583K | -3.38% |
| 2026-06-04 | 8.15 | 8.38 | 8.06 | 8.29 | 626K | +3.11% |
| 2026-06-03 | 8.13 | 8.35 | 8.00 | 8.04 | 1.03M | -1.71% |
| 2026-06-02 | 8.06 | 8.29 | 8.06 | 8.18 | 711K | +2.25% |
| 2026-06-01 | 8.09 | 8.20 | 7.94 | 8.00 | 969K | -2.08% |
| 2026-05-29 | 8.43 | 8.46 | 8.09 | 8.17 | 795K | -5.33% |
| 2026-05-28 | 8.59 | 8.71 | 8.50 | 8.63 | 531K | -0.58% |
| 2026-05-27 | 8.81 | 8.81 | 8.57 | 8.68 | 465K | -1.03% |
| 2026-05-26 | 8.95 | 9.00 | 8.71 | 8.77 | 701K | -0.90% |
| 2026-05-22 | 8.67 | 8.86 | 8.61 | 8.85 | 749K | +2.67% |
| 2026-05-21 | 8.55 | 8.72 | 8.37 | 8.62 | 632K | -0.35% |
| 2026-05-20 | 8.44 | 8.73 | 8.39 | 8.65 | 898K | +2.25% |
| 2026-05-19 | 9.07 | 9.07 | 8.44 | 8.46 | 909K | -6.62% |
| 2026-05-18 | 8.63 | 9.26 | 8.61 | 9.06 | 1.32M | +7.73% |
| 2026-05-15 | 8.45 | 8.63 | 8.20 | 8.41 | 1.23M | -2.44% |
| 2026-05-14 | 8.40 | 8.64 | 8.18 | 8.62 | 4.76M | +3.73% |
| 2026-05-13 | 8.73 | 8.77 | 8.13 | 8.31 | 3.43M | -4.81% |
| 2026-05-12 | 8.70 | 8.81 | 8.54 | 8.73 | 1.38M | +0.34% |
| 2026-05-11 | 9.33 | 9.33 | 8.62 | 8.70 | 1.49M | -4.71% |
| 2026-05-08 | 9.66 | 9.67 | 9.03 | 9.13 | 1.54M | -3.18% |
| 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% |
Intrinsic Valuation
DCF models, multiple analysis, and analyst estimates.
Historical Returns
10-year return with dividends reinvested.
DCA Calculator
See how regular investing compounds over time.
Peer Comparison
Compare growth, multiples, and margins vs sector.
ERII — Frequently Asked Questions
Quick answers to the most common questions about buying ERII stock.
How has ERII stock performed recently?
ERII declined -22.7% over the past year, below its 5-year annualized CAGR of -14.0%. 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 -22.7% 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 2008-2026, downloadable in CSV format.