Amphastar Pharmaceuticals Inc. (AMPH)
Showing Closing Date Range from Oct 30, 2025 to Oct 30, 2026 compared to Oct 29, 2024 to Oct 29, 2025.
Compare Last 12 Months with Previous Period
Investor Relations:ir.amphastar.com
Current Period Close
$26.93
Oct 30, 2025 - Oct 30, 2026
Previous Period Close
$24.24
Oct 29, 2024 - Oct 29, 2025
Net Comparison Delta
+$2.69 (+11.10%)
Relative performance vs prior benchmark
Historical Quotes & Breakdown(247 dates)
| Current Date | Current Close | Previous Date | Previous Close | Delta (%) |
|---|---|---|---|---|
| Oct 29, 2026 | $26.93 | Oct 23, 2025 | $24.72 | +8.94% |
| Oct 28, 2026 | $26.33 | Oct 22, 2025 | $24.52 | +7.38% |
| Oct 27, 2026 | $25.57 | Oct 21, 2025 | $24.26 | +5.40% |
| Oct 26, 2026 | $25.47 | Oct 20, 2025 | $23.73 | +7.33% |
| Oct 23, 2026 | $25.14 | Oct 17, 2025 | $23.78 | +5.72% |
| Oct 22, 2026 | $26.04 | Oct 16, 2025 | $23.22 | +12.14% |
| Oct 21, 2026 | $26.20 | Oct 15, 2025 | $23.14 | +13.22% |
| Oct 20, 2026 | $25.94 | Oct 14, 2025 | $23.86 | +8.72% |
| Oct 19, 2026 | $26.14 | Oct 13, 2025 | $23.51 | +11.19% |
| Oct 16, 2026 | $25.87 | Oct 10, 2025 | $23.63 | +9.48% |
| Oct 15, 2026 | $26.42 | Oct 09, 2025 | $24.97 | +5.81% |
| Oct 14, 2026 | $26.08 | Oct 08, 2025 | $25.98 | +0.38% |
| Oct 13, 2026 | $26.05 | Oct 07, 2025 | $25.83 | +0.85% |
| Oct 12, 2026 | $26.76 | Oct 06, 2025 | $26.58 | +0.68% |
| Oct 09, 2026 | $26.62 | Oct 03, 2025 | $26.75 | -0.49% |
Page 1 of 17