ERII
Energy Recovery, Inc.
stockNASDAQ
At CloseOct 2, 2026 3:59:58 PM EDT
6.78USD+1.194%(+0.08)618,164
As of 2026-09-15, there were 3,431,138 shares short with a short interest of 6.93%.
ERII Short Interest - Official
Short Interest
ERII Short Position Change - Official
Short Position Change
ERII Short Interest - Official
| Settlement Date1 | Short Interest % | Short Position | Days to Cover2 | Short Position Change | Short Position Change % | Shares Out | Shares Float |
|---|---|---|---|---|---|---|---|
| 2026-09-15 | 6.93 | 3,431,138 | 3.21 | +65,871 | +1.96 | 51,044,875 | 49,516,953 |
| 2026-08-31 | 6.80 | 3,365,267 | 3.33 | -77,501 | -2.25 | 51,044,875 | 49,516,953 |
| 2026-08-14 | 6.95 | 3,442,768 | 3.21 | +668,515 | +24.10 | 51,044,875 | 49,516,953 |
| 2026-07-31 | 5.60 | 2,774,253 | 3.56 | +61,972 | +2.28 | 51,545,259 | 49,583,446 |
| 2026-07-15 | 5.47 | 2,712,281 | 4.01 | +147,420 | +5.75 | 51,545,259 | 49,583,446 |
| 2026-06-30 | 5.17 | 2,564,861 | 1.78 | +282,367 | +12.37 | 51,545,259 | 49,598,395 |
| 2026-06-15 | 4.60 | 2,282,494 | 2.63 | +382,109 | +20.11 | 51,545,259 | 49,598,395 |
| 2026-05-15 | 3.79 | 1,900,385 | 1.03 | +170,611 | +9.86 | 51,545,259 | 50,080,176 |
| 2026-04-30 | 3.33 | 1,729,774 | 1.71 | -338,306 | -16.36 | 52,828,666 | 51,922,189 |
| 2026-04-15 | 3.98 | 2,068,080 | 2.96 | -54,010 | -2.55 | 52,828,666 | 51,922,189 |
| 2026-03-31 | 4.09 | 2,122,090 | 2.39 | +559,231 | +35.78 | 52,828,666 | 51,922,189 |
| 2026-03-13 | 3.01 | 1,562,859 | 1.52 | +118,415 | +8.20 | 52,828,666 | 51,922,189 |
| 2026-02-27 | 2.78 | 1,444,444 | 1.70 | -76,123 | -5.01 | 52,972,096 | 51,922,189 |
| 2026-02-13 | 2.93 | 1,520,567 | 5.42 | -36,534 | -2.35 | 52,972,096 | 51,922,189 |
| 2026-01-30 | 3.00 | 1,557,101 | 4.84 | +134,518 | +9.46 | 52,972,096 | 51,922,189 |
| 2026-01-15 | 2.74 | 1,422,583 | 4.70 | -20,311 | -1.41 | 52,972,096 | 51,922,189 |
| 2025-12-31 | 2.78 | 1,442,894 | 2.95 | -191,628 | -11.72 | 52,972,096 | 51,922,189 |
| 2025-12-15 | 3.15 | 1,634,522 | 4.03 | -23,035 | -1.39 | 52,972,096 | 51,922,189 |
| 2025-11-28 | 3.19 | 1,657,557 | 3.11 | +409,913 | +32.85 | 52,972,096 | 51,891,995 |
| 2025-11-14 | 2.40 | 1,247,644 | 1.45 | -263,092 | -17.41 | 52,972,096 | 51,891,995 |
| 2025-10-31 | 2.90 | 1,510,736 | 3.96 | +151,235 | +11.12 | 53,198,386 | 52,118,459 |
| 2025-10-15 | 2.61 | 1,359,501 | 3.54 | +97,193 | +7.70 | 53,198,386 | 52,118,459 |
Historical data is split-adjusted.
1 Data from Finra. Finra publishes an updated file every two weeks.
2 Days to Cover (DTC) is also called Short Ratio. This is the Short Position / Average Daily Trading Volume.