ERII short interest
Energy Recovery Inc. · Industrials · Industrial - Pollution & Treatment Controls · settlement date 2026-09-30
| Shares short | 3,321,523 |
|---|---|
| Change vs prior report | -109,615 (-3.2%) |
| Change over six months | +56.5% |
| Days to cover | 3.70 (sector: 2.82) |
| Average daily volume | 897,776 |
| Rank in Industrials | #265 of 627 by days to cover |
ERII short interest, last 12 months
| Settlement | Shares short | Change | Days to cover | Avg daily volume |
|---|---|---|---|---|
| 2026-09-30 | 3,321,523 | -3.2% | 3.70 | 897,776 |
| 2026-09-15 | 3,431,138 | +2.0% | 3.21 | 1,068,188 |
| 2026-08-31 | 3,365,267 | -2.2% | 3.33 | 1,009,575 |
| 2026-08-14 | 3,442,768 | +24.1% | 3.21 | 1,073,469 |
| 2026-07-31 | 2,774,253 | +2.3% | 3.56 | 778,626 |
| 2026-07-15 | 2,712,281 | +5.8% | 4.01 | 675,929 |
| 2026-06-30 | 2,564,861 | +12.4% | 1.78 | 1,442,594 |
| 2026-06-15 | 2,282,494 | +10.3% | 2.63 | 868,694 |
| 2026-05-29 | 2,069,656 | +8.9% | 2.54 | 815,052 |
| 2026-05-15 | 1,900,385 | +9.9% | 1.03 | 1,837,458 |
| 2026-04-30 | 1,729,774 | -16.4% | 1.71 | 1,013,639 |
| 2026-04-15 | 2,068,080 | -2.5% | 2.96 | 698,890 |
| 2026-03-31 | 2,122,090 | +35.8% | 2.39 | 888,188 |
| 2026-03-13 | 1,562,859 | +8.2% | 1.52 | 1,029,751 |
| 2026-02-27 | 1,444,444 | -5.0% | 1.70 | 847,591 |
| 2026-02-13 | 1,520,567 | -2.4% | 5.42 | 280,429 |
| 2026-01-30 | 1,557,101 | +9.5% | 4.84 | 321,700 |
| 2026-01-15 | 1,422,583 | -1.4% | 4.70 | 302,813 |
| 2025-12-31 | 1,442,894 | -11.7% | 2.95 | 489,201 |
| 2025-12-15 | 1,634,522 | -1.4% | 4.03 | 405,367 |
| 2025-11-28 | 1,657,557 | +32.9% | 3.11 | 532,894 |
| 2025-11-14 | 1,247,644 | -17.4% | 1.45 | 862,841 |
| 2025-10-31 | 1,510,736 | +11.1% | 3.96 | 381,197 |
| 2025-10-15 | 1,359,501 | +7.7% | 3.54 | 383,957 |
| 2025-09-30 | 1,262,308 | +0.7% | 2.39 | 527,121 |
import finzdata as yf
yf.Ticker("ERII").short_interest # every report since 2017
yf.Client().short_interest(["ERII"], start="2018-01-01")Industrials short interest · ERII price history · Who owns ERII · All short interest