AMPH short interest
Amphastar Pharmaceuticals Inc. · Healthcare · Drug Manufacturers - Specialty & Generic · settlement date 2026-09-30
| Shares short | 4,405,038 |
|---|---|
| Change vs prior report | -589,770 (-11.8%) |
| Change over six months | +24.9% |
| Days to cover | 7.10 (sector: 3.78) |
| Average daily volume | 620,832 |
| Rank in Healthcare | #243 of 922 by days to cover |
AMPH short interest, last 12 months
| Settlement | Shares short | Change | Days to cover | Avg daily volume |
|---|---|---|---|---|
| 2026-09-30 | 4,405,038 | -11.8% | 7.10 | 620,832 |
| 2026-09-15 | 4,994,808 | -2.7% | 10.75 | 464,708 |
| 2026-08-31 | 5,134,473 | -4.7% | 15.36 | 334,222 |
| 2026-08-14 | 5,385,239 | +9.3% | 9.96 | 540,569 |
| 2026-07-31 | 4,928,331 | +18.1% | 11.89 | 414,646 |
| 2026-07-15 | 4,174,460 | +8.6% | 11.15 | 374,286 |
| 2026-06-30 | 3,845,576 | +1.2% | 5.24 | 734,234 |
| 2026-06-15 | 3,799,584 | +1.4% | 7.13 | 532,703 |
| 2026-05-29 | 3,747,543 | -0.9% | 4.73 | 792,627 |
| 2026-05-15 | 3,779,877 | +5.4% | 4.71 | 802,000 |
| 2026-04-30 | 3,585,957 | -8.1% | 8.71 | 411,556 |
| 2026-04-15 | 3,903,290 | +10.7% | 8.63 | 452,484 |
| 2026-03-31 | 3,527,477 | -5.6% | 6.70 | 526,830 |
| 2026-03-13 | 3,738,333 | +2.2% | 5.15 | 725,722 |
| 2026-02-27 | 3,658,291 | -1.6% | 6.13 | 596,725 |
| 2026-02-13 | 3,719,566 | -3.2% | 11.17 | 333,044 |
| 2026-01-30 | 3,843,799 | +1.1% | 14.99 | 256,404 |
| 2026-01-15 | 3,803,135 | -7.2% | 9.91 | 383,841 |
| 2025-12-31 | 4,096,041 | +2.9% | 11.40 | 359,453 |
| 2025-12-15 | 3,981,951 | +19.1% | 10.62 | 375,076 |
| 2025-11-28 | 3,343,646 | -6.9% | 8.66 | 385,893 |
| 2025-11-14 | 3,589,725 | -14.4% | 6.57 | 546,145 |
| 2025-10-31 | 4,194,131 | -2.3% | 11.62 | 360,887 |
| 2025-10-15 | 4,291,932 | +7.9% | 11.92 | 360,143 |
| 2025-09-30 | 3,977,178 | -3.7% | 7.28 | 546,368 |
import finzdata as yf
yf.Ticker("AMPH").short_interest # every report since 2017
yf.Client().short_interest(["AMPH"], start="2018-01-01")Healthcare short interest · AMPH price history · Who owns AMPH · All short interest