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20.91
3.62%
0.73
After Hours:
20.91
Amphastar Pharmaceuticals Inc Stock (AMPH) Price History
The historical daily chart and data for Amphastar Pharmaceuticals Inc stock (AMPH), show that the latest closing stock price as of August 14, 2026, is $20.91.
- Amphastar Pharmaceuticals Inc all-time high stock price is $67.66, occurred on August 09, 2023.
- The lowest Amphastar Pharmaceuticals Inc stock price recorded was $6.67 on June 25, 2014. Since then, Amphastar Pharmaceuticals Inc's stock price has risen over 213.49% to $20.91 now.
- The 52-week high stock price for AMPH is $31.26, representing a 49.52% increase from the current share price, occurred on September 02, 2025.
- The 52-week low stock price for AMPH is $16.64, indicating a -20.40% decrease from the current share price, occurred on May 18, 2026.
- The closing price of Amphastar Pharmaceuticals Inc (AMPH) stock in the beginning of 2025 was $23.07. The stock closed the year at $28.02, a gain of over 21.46% for the year.
The table below shows more information about AMPH historical price data:
Daily
Weekly
Monthly
7D
30D
60D
YTD
1Y
| Date | High | Low | High - Low | Volume | % Change |
|---|---|---|---|---|---|
| Aug 14, 2026 | $21.07 | $19.89 | $1.18 | 305,681.0 | +3.62% |
| Aug 13, 2026 | $20.27 | $19.84 | $0.43 | 307,442.0 | +1.00% |
| Aug 12, 2026 | $20.21 | $19.61 | $0.605 | 337,349.0 | -2.15% |
| Aug 11, 2026 | $20.57 | $20.00 | $0.57 | 363,291.0 | +0.54% |
| Aug 10, 2026 | $20.90 | $19.55 | $1.35 | 645,738.0 | -2.26% |
| Aug 07, 2026 | $22.64 | $20.40 | $2.25 | 1,299,623.0 | +4.90% |
| Aug 06, 2026 | $20.25 | $19.60 | $0.6477 | 526,645.0 | -2.12% |
| Aug 05, 2026 | $20.28 | $19.88 | $0.40 | 351,618.0 | +1.71% |
| Aug 04, 2026 | $20.38 | $19.86 | $0.52 | 481,647.0 | -1.58% |
| Aug 03, 2026 | $20.45 | $19.70 | $0.755 | 413,179.0 | +1.40% |
| Jul 31, 2026 | $20.41 | $19.66 | $0.745 | 367,623.0 | -2.16% |
| Jul 30, 2026 | $20.52 | $19.95 | $0.575 | 355,683.0 | -0.97% |
| Jul 29, 2026 | $20.70 | $19.98 | $0.715 | 321,672.0 | +2.13% |
| Jul 28, 2026 | $20.27 | $19.38 | $0.89 | 390,836.0 | +5.06% |
| Jul 27, 2026 | $19.31 | $18.96 | $0.35 | 285,916.0 | +2.46% |
| Jul 24, 2026 | $19.12 | $18.50 | $0.62 | 445,582.0 | -0.79% |
| Jul 23, 2026 | $19.34 | $18.73 | $0.61 | 650,429.0 | -2.23% |
| Jul 22, 2026 | $19.95 | $19.20 | $0.75 | 409,241.0 | -1.48% |
| Jul 21, 2026 | $19.89 | $19.42 | $0.47 | 620,355.0 | -0.20% |
| Jul 20, 2026 | $19.91 | $19.52 | $0.3924 | 437,415.0 | -0.58% |
Amphastar Pharmaceuticals Inc Stock (AMPH) Year by Year Price History
In this detailed analysis, we present a comprehensive overview of the price movements of Amphastar Pharmaceuticals Inc stock over the years. By exploring the year-by-year data, investors can gain valuable insights into the historical performance and volatility of AMPH shares. From significant milestones and fluctuations to notable trends, this in-depth examination of Amphastar Pharmaceuticals Inc stock price history provides a foundation for understanding how the company's stock has evolved over time.
Amphastar Pharmaceuticals Inc Stock (AMPH) Price History 2026
| Month | High | Low | High - Low | Volume | % Change |
|---|---|---|---|---|---|
| Aug, 2026 | $22.64 | $19.55 | $3.09 | 5,337,894.0 | +4.86% |
| Jul, 2026 | $20.70 | $18.45 | $2.25 | 8,799,192.0 | -1.19% |
| Jun, 2026 | $22.00 | $17.73 | $4.27 | 13,246,542.0 | +7.06% |
| May, 2026 | $24.34 | $16.64 | $7.70 | 16,106,035.0 | -14.16% |
| Apr, 2026 | $23.26 | $19.68 | $3.58 | 9,083,801.0 | +12.10% |
| Mar, 2026 | $21.14 | $17.03 | $4.11 | 13,831,742.0 | -3.16% |
| Feb, 2026 | $29.46 | $19.83 | $9.63 | 9,033,886.0 | -23.63% |
| Jan, 2026 | $29.52 | $25.42 | $4.10 | 6,297,265.0 | -1.08% |
Amphastar Pharmaceuticals Inc Stock (AMPH) Price History 2025
| Month | High | Low | High - Low | Volume | % Change |
|---|---|---|---|---|---|
| Dec, 2025 | $27.84 | $25.16 | $2.68 | 7,597,226.0 | -2.53% |
| Nov, 2025 | $29.00 | $23.67 | $5.33 | 9,049,007.0 | +8.63% |
| Oct, 2025 | $27.39 | $22.94 | $4.45 | 8,362,746.0 | -4.32% |
| Sep, 2025 | $31.26 | $25.95 | $5.31 | 10,233,521.0 | -12.97% |
| Aug, 2025 | $31.23 | $20.39 | $10.84 | 13,060,640.0 | +46.16% |
| Jul, 2025 | $24.52 | $20.43 | $4.09 | 9,990,721.0 | -8.75% |
| Jun, 2025 | $27.40 | $22.81 | $4.59 | 10,316,734.0 | -10.70% |
| May, 2025 | $25.92 | $23.20 | $2.72 | 11,844,539.0 | +5.33% |
| Apr, 2025 | $29.27 | $22.64 | $6.63 | 13,298,283.0 | -15.80% |
| Mar, 2025 | $29.37 | $25.89 | $3.48 | 12,382,251.0 | +1.97% |
| Feb, 2025 | $34.39 | $27.82 | $6.57 | 10,545,190.0 | -18.47% |
| Jan, 2025 | $39.01 | $34.60 | $4.41 | 11,099,058.0 | -6.09% |
Amphastar Pharmaceuticals Inc Stock (AMPH) Price History 2024
| Month | High | Low | High - Low | Volume | % Change |
|---|---|---|---|---|---|
| Dec, 2024 | $46.11 | $36.80 | $9.31 | 11,753,587.0 | -18.48% |
| Nov, 2024 | $53.95 | $43.09 | $10.86 | 8,864,599.0 | -10.57% |
| Oct, 2024 | $51.84 | $45.50 | $6.34 | 6,181,025.0 | +4.12% |
| Sep, 2024 | $50.62 | $43.60 | $7.02 | 7,247,128.0 | -0.43% |
| Aug, 2024 | $49.30 | $38.42 | $10.88 | 8,332,208.0 | +11.99% |
| Jul, 2024 | $44.25 | $36.56 | $7.69 | 8,991,845.0 | +8.80% |
| Jun, 2024 | $43.49 | $39.53 | $3.96 | 6,654,536.0 | -5.50% |
| May, 2024 | $46.62 | $41.21 | $5.41 | 7,425,781.0 | +2.62% |
| Apr, 2024 | $43.97 | $38.43 | $5.54 | 7,194,165.0 | -6.06% |
| Mar, 2024 | $48.00 | $42.16 | $5.84 | 9,536,304.0 | -5.71% |
| Feb, 2024 | $56.45 | $44.58 | $11.88 | 9,097,171.0 | -12.72% |
| Jan, 2024 | $65.92 | $52.33 | $13.59 | 11,255,123.0 | -13.73% |
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