Range Low Price High Price Comment
30 days $17.73 $20.76 Monday, 22nd Jun 2026 AMPH stock ended at $18.33. This is 2.55% less than the trading day before Thursday, 18th Jun 2026. During the day the stock fluctuated 3.70% from a day low at $18.22 to a day high of $18.90.
90 days $16.65 $24.35
52 weeks $16.65 $31.26

Historical Amphastar Pharmaceuticals prices

Date Open High Low Close Volume
Jun 22, 2026 $18.76 $18.90 $18.22 $18.33 720 988
Jun 18, 2026 $19.51 $19.66 $18.71 $18.81 1 255 772
Jun 17, 2026 $19.94 $20.26 $19.15 $19.41 991 788
Jun 16, 2026 $19.91 $20.41 $19.62 $19.96 718 505
Jun 15, 2026 $20.11 $20.29 $19.59 $19.71 586 137
Jun 12, 2026 $19.90 $20.55 $19.90 $20.09 376 506
Jun 11, 2026 $20.32 $20.65 $20.10 $20.53 455 032
Jun 10, 2026 $20.38 $20.76 $19.99 $20.29 383 806
Jun 09, 2026 $19.74 $20.27 $19.69 $20.16 496 066
Jun 08, 2026 $19.75 $19.85 $19.34 $19.39 526 610
Jun 05, 2026 $18.86 $20.14 $18.85 $19.74 737 395
Jun 04, 2026 $18.28 $18.90 $18.28 $18.70 459 231
Jun 03, 2026 $18.26 $18.34 $17.73 $18.12 492 109
Jun 02, 2026 $18.36 $18.67 $18.10 $18.45 352 313
Jun 01, 2026 $18.78 $18.99 $18.23 $18.42 525 331
May 29, 2026 $19.28 $19.42 $18.55 $18.85 767 873
May 28, 2026 $19.04 $19.54 $19.02 $19.30 600 582
May 27, 2026 $19.11 $19.32 $18.56 $19.10 485 186
May 26, 2026 $18.45 $19.12 $18.45 $18.81 665 351
May 22, 2026 $18.25 $18.44 $17.93 $18.41 474 116
May 21, 2026 $17.93 $18.37 $17.76 $18.16 1 588 257
May 20, 2026 $17.82 $18.16 $17.70 $18.08 850 461
May 19, 2026 $17.28 $17.91 $17.00 $17.82 613 576
May 18, 2026 $16.86 $17.31 $16.65 $17.20 866 025
May 15, 2026 $17.30 $17.53 $16.76 $16.87 679 289

FAQ

What are historical stock prices?
Historical stock prices refer to a stock’s recorded prices at various past points. These prices include several key figures that help investors and analysts evaluate a stock’s performance over time:
Open: Open price for the trading day.
High: Highest price for the trading day.
Low: Lowest price for the trading day.
Close: Close price for the trading day.

Additionally, historical prices often include:
Volume is the number of shares traded during the day. It indicates how actively a stock was traded and can provide insights into market sentiment and liquidity.

How can I use AMPH stock historical prices to predict future price movements?
Trend Analysis: Examine the AMPH stock’s historical trends to identify patterns that might continue.
Moving Averages: Use moving averages to detect potential reversal points.
Momentum Indicators: Apply indicators like RSI or MACD to assess the momentum and strength of price movements.
Volume Analysis: Analyze trading volume alongside price changes to gauge trend strength.
Statistical Methods: Use statistical tools such as regression analysis to model and forecast future prices based on past data.
These techniques can provide insights but should be used with risk management practices to mitigate potential losses.

What impact do stock splits have on historical price data?
When a company performs a stock split, it adjusts the historical price data to reflect the new, lower trading price as if it had always been that way.

This ensures consistency for anyone analyzing the stock’s past prices. The adjustment helps prevent misleading signals on charts, such as false sell signals or bearish trends that aren’t there. For instance, in a 2-for-1 stock split, the price per share is cut in half, which would otherwise appear as a dramatic drop on the chart. If someone didn’t know about the split, they might wrongly think something negative happened to the company. Most technical indicators would also react to this apparent drop by signaling to sell.

A stock split, while making the shares seem more affordable and potentially more attractive to investors, doesn’t alter the company’s fundamental value.

Why do the AMPH stock historical prices show a range for periods like 30 days, 90 days, and 52 weeks?
The range provides the lowest and highest prices at which the stock has traded during the specified period. This helps investors understand the stock’s volatility and price variability within that timeframe.

How can I use historical price volatility to assess risk?
High price volatility historically indicates higher risk and potentially higher returns. Investors can gauge the stock’s risk level by examining the range between high and low prices over various periods.
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ABOUT AMPHASTAR PHARMACEUTICALS
Amphastar Pharmaceuticals
Amphastar Pharmaceuticals, Inc., a bio-pharmaceutical company, develops, manufactures, markets, and sells generic and proprietary injectable, inhalation, and intranasal products in the United States, China, and France. The company operates through two segments, Finished Pharmaceutical Products and API. It offers Primatene Mist, an over-the-counter epinephrine inhalation product for the temporary relief of mild symptoms of intermittent asthma; Eno...
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