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Amphastar Pharmaceuticals (AMPH) Stock Chart & Stock Price History

Amphastar Pharmaceuticals logo
$23.18 0.00 (0.00%)
As of 09/4/2026 04:00 PM Eastern

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 21.21%, with a year-to-date return of -13.44%. In the past month, the stock has increased 11.55%, reflecting recent market activity.

As of the latest close, Amphastar Pharmaceuticals traded at $23.18 with a market cap of $986.03 million and volume of 626,316 shares. Five years ago, the stock traded at $18.80, representing a 23.30% increase over that period. At the time, it had a market cap of $903.00 million and a volume of 149,603 shares.

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5 Day
Performance
-2.36%
1 Month
Performance
+11.55%
3 Month
Performance
+17.43%
Year-To-Date
Performance
-13.44%
1 Year
Performance
-21.21%
5 Year
Performance
+23.30%

AMPH Stock Chart for Monday, September, 7, 2026

Amphastar Pharmaceuticals Stock Price History

DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization
09/04/2026$23.84$23.18
-2.77%
$23.74$23.07626,316 shs$986.08 million
09/03/2026$23.74$23.84
+0.42%
$23.92$23.04469,751 shs$1.01 billion
09/02/2026$22.96$23.74
+3.40%
$23.83$23.03456,605 shs$1.01 billion
09/01/2026$22.53$22.96
+1.91%
$23.05$22.59550,956 shs$976.72 million
08/31/2026$22.01$22.53
+2.36%
$22.65$21.52274,025 shs$958.43 million
08/28/2026$21.88$22.01
+0.59%
$22.15$21.69224,528 shs$936.31 million
08/27/2026$22.02$21.88
-0.64%
$21.97$21.63259,782 shs$930.78 million
08/26/2026$21.98$22.02
+0.18%
$22.44$21.72395,570 shs$936.73 million
08/25/2026$21.52$21.98
+2.14%
$22.07$21.41283,773 shs$935.03 million
08/24/2026$21.60$21.52
-0.37%
$21.81$21.26210,263 shs$915.46 million
08/21/2026$21.68$21.60
-0.37%
$22.20$21.44376,557 shs$918.86 million
08/20/2026$21.74$21.68
-0.28%
$21.76$21.24338,696 shs$924.78 million
08/19/2026$21.34$21.74
+1.87%
$21.99$21.15410,771 shs$924.82 million
08/18/2026$20.86$21.34
+2.30%
$21.59$21.08411,818 shs$907.80 million
08/17/2026$20.91$20.86
-0.24%
$21.23$20.77533,505 shs$887.34 million
08/14/2026$20.18$20.91
+3.62%
$21.07$19.89305,681 shs$889.47 million
08/13/2026$19.98$20.18
+1.00%
$20.27$19.84526,117 shs$858.46 million
08/12/2026$20.42$19.98
-2.15%
$20.22$19.61337,350 shs$849.95 million
08/11/2026$20.31$20.42
+0.54%
$20.57$20.00570,492 shs$868.63 million
08/10/2026$20.78$20.31
-2.26%
$20.90$19.55645,742 shs$863.99 million
08/07/2026$19.81$20.78
+4.90%
$22.65$20.401.30 million shs$916.19 million
08/06/2026$20.22$19.81
-2.02%
$20.25$19.60526,646 shs$873.42 million

This page (NASDAQ:AMPH) was last updated on 9/4/2026 by MarketBeat.com Staff.
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