Amphastar Pharmaceuticals (AMPH) Stock Chart & Stock Price History $28.19 -0.27 (-0.95%) As of 01:50 PM Eastern This is a fair market value price provided by Polygon.io. Learn more. Add Compare Share Share Chart Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Amphastar Pharmaceuticals Stock Price Performance 5 Day Performance+1.97%1 Month Performance-11.03%3 Month Performance-25.63%6 Month Performance-39.08%Year-To-Date Performance-23.35%1 Year Performance-34.77% Receive AMPH Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Amphastar Pharmaceuticals and its competitors with MarketBeat's FREE daily newsletter. Email Address AMPH Stock Chart for Tuesday, March, 25, 2025 AMPH Chart by TradingViewRemove Ads Amphastar Pharmaceuticals Stock Price History Daily Weekly Monthly Time Frame Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year Time Frame * Start Date * End Date Export to Excel DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization03/24/2025$28.29$28.46+0.60%$28.65$28.07537,620 shs$1.36 billion03/21/2025$27.91$28.29+1.36%$28.44$27.661.48 million shs$1.35 billion03/20/2025$27.86$27.91+0.18%$28.38$27.69406,990 shs$1.33 billion03/19/2025$27.36$27.86+1.83%$27.87$27.09471,499 shs$1.33 billion03/18/2025$27.69$27.36-1.19%$27.81$27.22602,473 shs$1.30 billion03/17/2025$26.66$27.69+3.86%$27.98$26.68648,301 shs$1.32 billion03/14/2025$26.24$26.66+1.60%$26.76$26.14500,710 shs$1.27 billion03/13/2025$26.28$26.24-0.15%$26.86$25.89467,567 shs$1.25 billion03/12/2025$27.33$26.28-3.84%$27.55$26.22700,418 shs$1.25 billion03/11/2025$28.41$27.33-3.80%$28.40$27.25515,760 shs$1.30 billion Get the Latest News and Ratings for AMPH and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Amphastar Pharmaceuticals and its competitors with MarketBeat's FREE daily newsletter. 03/10/2025$28.81$28.41-1.39%$29.34$28.22536,987 shs$1.35 billion03/07/2025$28.32$28.81+1.73%$29.37$28.08544,259 shs$1.39 billion03/06/2025$28.06$28.32+0.93%$28.49$27.26721,256 shs$1.36 billion03/05/2025$27.62$28.06+1.59%$28.06$27.04632,357 shs$1.35 billion03/04/2025$27.52$27.62+0.36%$28.24$27.00803,213 shs$1.33 billion03/03/2025$28.43$27.52-3.20%$29.10$26.98999,415 shs$1.32 billion02/28/2025$31.49$28.43-9.72%$31.00$27.821.79 million shs$1.37 billion02/27/2025$31.21$31.49+0.90%$31.70$31.00605,943 shs$1.51 billion02/26/2025$31.99$31.21-2.44%$32.22$31.08507,963 shs$1.50 billion02/25/2025$32.29$31.99-0.93%$32.56$31.87575,644 shs$1.54 billion02/24/2025$31.28$32.29+3.23%$32.69$31.08518,433 shs$1.55 billion Related Companies ELAN Stock Chart PTCT Stock Chart ADMA Stock Chart ZLAB Stock Chart RNA Stock Chart OGN Stock Chart ACLX Stock Chart SWTX Stock Chart RARE Stock Chart AKRO Stock Chart Receive AMPH Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Amphastar Pharmaceuticals and its competitors with MarketBeat's FREE daily newsletter. 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