Amphastar Pharmaceuticals Inc. (AMPH)
Showing Closing Date Range from Jul 11 to Oct 9, 2026 compared to Apr 11 to Jul 10, 2026.
Compare Last 3 Months with Previous Period
Investor Relations:ir.amphastar.com
Current Period Close
$26.62
Jul 11, 2026 - Oct 09, 2026
Previous Period Close
$18.72
Apr 11, 2026 - Jul 10, 2026
Net Comparison Delta
+$7.90 (+42.20%)
Relative performance vs prior benchmark
Historical Quotes & Breakdown(60 dates)
| Current Date | Current Close | Previous Date | Previous Close | Delta (%) |
|---|---|---|---|---|
| Oct 09, 2026 | $26.62 | Jul 08, 2026 | $18.88 | +41.00% |
| Oct 08, 2026 | $25.81 | Jul 07, 2026 | $20.08 | +28.54% |
| Oct 07, 2026 | $25.54 | Jul 06, 2026 | $19.61 | +30.24% |
| Oct 06, 2026 | $25.91 | Jul 02, 2026 | $19.64 | +31.92% |
| Oct 05, 2026 | $25.37 | Jul 01, 2026 | $20.10 | +26.22% |
| Oct 02, 2026 | $25.43 | Jun 30, 2026 | $20.18 | +26.02% |
| Sep 25, 2026 | $26.13 | Jun 29, 2026 | $20.71 | +26.17% |
| Sep 24, 2026 | $26.27 | Jun 26, 2026 | $21.78 | +20.62% |
| Sep 23, 2026 | $24.96 | Jun 25, 2026 | $21.04 | +18.63% |
| Sep 22, 2026 | $24.32 | Jun 24, 2026 | $21.02 | +15.70% |
| Sep 21, 2026 | $24.48 | Jun 23, 2026 | $19.53 | +25.35% |
| Sep 18, 2026 | $23.62 | Jun 22, 2026 | $18.33 | +28.86% |
| Sep 17, 2026 | $23.82 | Jun 18, 2026 | $18.81 | +26.63% |
| Sep 16, 2026 | $23.95 | Jun 17, 2026 | $19.41 | +23.39% |
| Sep 15, 2026 | $23.64 | Jun 16, 2026 | $19.96 | +18.44% |
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