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Amphastar Pharmaceuticals (AMPH) Stock Chart & Stock Price History

Amphastar Pharmaceuticals logo
$20.29 +0.13 (+0.64%)
Closing price 04:00 PM Eastern
Extended Trading
$20.29 0.00 (0.00%)
As of 04:10 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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Amphastar Pharmaceuticals Stock Price Performance

The Amphastar Pharmaceuticals (AMPH) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has decreased 24.63%, with a year-to-date return of -24.23%. In the past month, the stock has increased 6.79%, reflecting recent market activity.

As of the latest close, Amphastar Pharmaceuticals traded at $20.16 with a market cap of $888.85 million and volume of 506,257 shares. Five years ago, the stock traded at $19.70, representing a 2.99% increase over that period. At the time, it had a market cap of $938.41 million and a volume of 180,488 shares.

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5 Day
Performance
+2.79%
1 Month
Performance
+6.79%
3 Month
Performance
+7.30%
Year-To-Date
Performance
-24.23%
1 Year
Performance
-24.63%
5 Year
Performance
+2.99%

AMPH Stock Chart for Wednesday, June, 10, 2026

AMPH Chart by TradingView

Amphastar Pharmaceuticals Stock Price History

Export
DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization
06/10/2026$20.16$20.29
+0.64%		$20.77$19.99405,165 shs$894.59 million
06/09/2026$19.39$20.16
+3.97%		$20.27$19.53506,257 shs$888.85 million
06/08/2026$19.74$19.39
-1.77%		$19.84$19.33558,990 shs$854.96 million
06/05/2026$18.70$19.74
+5.56%		$20.14$18.85748,242 shs$870.40 million
06/04/2026$18.09$18.70
+3.35%		$18.90$18.28459,232 shs$824.48 million
06/03/2026$18.45$18.09
-1.93%		$18.36$17.73509,323 shs$797.76 million
06/02/2026$18.42$18.45
+0.16%		$18.67$18.10810,461 shs$812.19 million
06/01/2026$18.85$18.42
-2.28%		$19.01$18.22569,686 shs$812.14 million
05/29/2026$19.30$18.85
-2.33%		$19.46$18.55849,068 shs$831.10 million
05/28/2026$19.10$19.30
+1.05%		$19.55$19.02621,214 shs$850.94 million
05/27/2026$18.81$19.10
+1.54%		$19.33$18.50497,079 shs$842.18 million
05/26/2026$18.41$18.81
+2.17%		$19.12$18.45670,766 shs$829.33 million
05/25/2026$18.41$18.41$18.44$17.93485,196 shs$811.70 million
05/22/2026$18.16$18.41
+1.38%		$18.44$17.93485,196 shs$811.70 million
05/21/2026$18.08$18.16
+0.44%		$18.37$17.751.66 million shs$800.67 million
05/20/2026$17.82$18.08
+1.46%		$18.19$17.70868,757 shs$797.20 million
05/19/2026$17.20$17.82
+3.60%		$17.91$17.00725,147 shs$785.68 million
05/18/2026$16.87$17.20
+1.96%		$17.31$16.65866,025 shs$758.35 million
05/15/2026$17.30$16.87
-2.49%		$17.53$16.75679,289 shs$743.80 million
05/14/2026$18.32$17.30
-5.57%		$18.08$17.26739,074 shs$762.81 million
05/13/2026$17.50$18.32
+4.69%		$18.57$17.43971,190 shs$807.73 million
05/12/2026$18.45$17.50
-5.15%		$18.58$17.261.22 million shs$771.58 million
05/11/2026$19.00$18.45
-2.89%		$19.41$18.331.36 million shs$821.67 million
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This page (NASDAQ:AMPH) was last updated on 6/10/2026 by MarketBeat.com Staff.
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