NASDAQ:AMPH | Historical Stock Price | Amphastar Pharmaceuticals, Inc.

Complete retained daily price history on its own workbook tab. Split-adjusted close keeps every historical share price on one comparable split basis. Cumulative dividend-reinvested close is the daily close of a rebased total-return index: it starts with one share at the earliest retained close, reinvests every distribution, and normalizes every forward and reverse split exactly once. Admitted exchange opening prices remain a distinct current-session series.

Available history
2014-06-25 to 2026-09-04
Data captured

Stock Price Chart

Blue: Split-adjusted close · Orange: Cumulative dividend-reinvested close

$8.31$12.59$19.07$28.88$43.73$66.232014-06-252026-08-27

Logarithmic scale. Both lines share the same starting value for the selected range.

View year

Historical Stock Price — 2016

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2016-12-30$18.42$18.42398,000
2016-12-29$18.38$18.38260,700
2016-12-28$18.53$18.53430,300
2016-12-27$18.57$18.57818,800
2016-12-23$20.43$20.43251,600
2016-12-22$20.06$20.06124,700
2016-12-21$20.19$20.19214,400
2016-12-20$20.69$20.69349,400
2016-12-19$20.30$20.30357,900
2016-12-16$21.00$21.001,999,800
2016-12-15$20.62$20.62289,300
2016-12-14$19.88$19.88275,400
2016-12-13$19.89$19.89289,000
2016-12-12$19.66$19.66395,900
2016-12-09$19.73$19.73301,300
2016-12-08$19.96$19.96227,100
2016-12-07$19.65$19.65445,200
2016-12-06$20.88$20.88237,800
2016-12-05$20.77$20.77282,500
2016-12-02$20.19$20.19201,900
2016-12-01$19.67$19.67320,200
2016-11-30$20.27$20.27227,400
2016-11-29$20.33$20.33213,100
2016-11-28$20.35$20.35211,200
2016-11-25$20.64$20.6494,100
2016-11-23$20.65$20.65268,700
2016-11-22$19.86$19.86382,500
2016-11-21$20.11$20.11513,800
2016-11-18$21.21$21.21239,800
2016-11-17$21.55$21.55382,700
2016-11-16$21.23$21.23387,100
2016-11-15$21.01$21.01662,600
2016-11-14$20.52$20.52525,400
2016-11-11$20.93$20.93685,000
2016-11-10$20.41$20.41689,500
2016-11-09$20.51$20.511,028,200
2016-11-08$17.63$17.63414,300
2016-11-07$17.95$17.95238,500
2016-11-04$17.34$17.34378,800
2016-11-03$16.99$16.99383,300
2016-11-02$18.26$18.26304,400
2016-11-01$18.47$18.47350,400
2016-10-31$18.14$18.14497,300
2016-10-28$17.89$17.89420,700
2016-10-27$18.40$18.40244,500
2016-10-26$18.18$18.18255,400
2016-10-25$18.48$18.48130,000
2016-10-24$18.48$18.48212,900
2016-10-21$18.59$18.59273,000
2016-10-20$18.45$18.45201,300
2016-10-19$18.10$18.10282,800
2016-10-18$18.15$18.15188,900
2016-10-17$18.04$18.04258,800
2016-10-14$18.00$18.00303,800
2016-10-13$18.34$18.34415,000
2016-10-12$18.43$18.43372,600
2016-10-11$19.17$19.17630,000
2016-10-10$19.69$19.69311,900
2016-10-07$19.49$19.49503,500
2016-10-06$19.10$19.10431,500
2016-10-05$19.87$19.87347,600
2016-10-04$19.61$19.61540,200
2016-10-03$19.34$19.34507,800
2016-09-30$18.97$18.97382,700
2016-09-29$18.84$18.84556,900
2016-09-28$19.57$19.57385,300
2016-09-27$19.91$19.91478,600
2016-09-26$19.58$19.58776,600
2016-09-23$20.07$20.071,592,800
2016-09-22$19.75$19.751,314,300
2016-09-21$20.90$20.906,087,500
2016-09-20$21.26$21.262,930,200
2016-09-19$19.00$19.00370,700
2016-09-16$19.16$19.16685,900
2016-09-15$18.67$18.67452,100
2016-09-14$18.23$18.23573,800
2016-09-13$17.91$17.91530,900
2016-09-12$18.40$18.40418,300
2016-09-09$18.15$18.15251,200
2016-09-08$18.86$18.86364,900
2016-09-07$19.03$19.03235,000
2016-09-06$18.91$18.91329,600
2016-09-02$18.56$18.56248,000
2016-09-01$18.99$18.99263,200
2016-08-31$19.00$19.00434,900
2016-08-30$19.45$19.45263,800
2016-08-29$19.35$19.35402,100
2016-08-26$19.44$19.44315,700
2016-08-25$19.22$19.22430,100
2016-08-24$19.30$19.30667,000
2016-08-23$20.41$20.41621,400
2016-08-22$20.01$20.011,014,500
2016-08-19$19.47$19.47435,000
2016-08-18$19.51$19.51664,500
2016-08-17$19.00$19.00787,500
2016-08-16$18.34$18.34380,400
2016-08-15$18.38$18.38358,400
2016-08-12$18.10$18.10355,700
2016-08-11$18.66$18.66855,900
2016-08-10$18.17$18.17651,400
2016-08-09$17.95$17.951,351,400
2016-08-08$16.02$16.02265,400
2016-08-05$15.97$15.97244,800
2016-08-04$16.22$16.22422,200
2016-08-03$16.29$16.29242,500
2016-08-02$16.17$16.17249,900
2016-08-01$16.29$16.29329,200
2016-07-29$16.18$16.18603,500
2016-07-28$16.27$16.27372,500
2016-07-27$16.57$16.57313,800
2016-07-26$16.57$16.57268,300
2016-07-25$16.57$16.57470,200
2016-07-22$17.24$17.24233,000
2016-07-21$17.50$17.50222,700
2016-07-20$17.47$17.47187,000
2016-07-19$17.06$17.06190,600
2016-07-18$17.45$17.45262,100
2016-07-15$17.43$17.43213,500
2016-07-14$17.46$17.46213,300
2016-07-13$17.34$17.34341,700
2016-07-12$17.34$17.34390,800
2016-07-11$16.94$16.94299,300
2016-07-08$16.80$16.80241,500
2016-07-07$16.66$16.66207,800
2016-07-06$16.70$16.70186,600
2016-07-05$16.33$16.33220,200
2016-07-01$16.28$16.28226,500
2016-06-30$16.12$16.12396,600
2016-06-29$16.08$16.08365,500
2016-06-28$16.63$16.63553,600
2016-06-27$15.51$15.51356,600
2016-06-24$15.61$15.61990,300
2016-06-23$16.15$16.15280,300
2016-06-22$15.59$15.59251,300
2016-06-21$15.16$15.16299,700
2016-06-20$14.81$14.81471,600
2016-06-17$15.00$15.00841,800
2016-06-16$15.43$15.43395,400
2016-06-15$15.76$15.76252,500
2016-06-14$15.73$15.73283,100
2016-06-13$15.94$15.94242,300
2016-06-10$16.13$16.13317,100
2016-06-09$16.43$16.43338,900
2016-06-08$16.21$16.21257,400
2016-06-07$16.21$16.21601,500
2016-06-06$16.07$16.07294,300
2016-06-03$15.78$15.78316,800
2016-06-02$16.00$16.00279,600
2016-06-01$15.85$15.85418,800
2016-05-31$15.73$15.73364,700
2016-05-27$15.75$15.75386,000
2016-05-26$15.44$15.44174,300
2016-05-25$15.49$15.49269,200
2016-05-24$15.48$15.48314,000
2016-05-23$15.06$15.06303,300
2016-05-20$15.43$15.43644,200
2016-05-19$14.28$14.28354,900
2016-05-18$14.06$14.06366,900
2016-05-17$13.66$13.66298,800
2016-05-16$13.46$13.46285,000
2016-05-13$12.98$12.98163,900
2016-05-12$12.55$12.55255,800
2016-05-11$12.82$12.82282,000
2016-05-10$12.99$12.99588,900
2016-05-09$11.85$11.85195,000
2016-05-06$11.72$11.72213,500
2016-05-05$11.82$11.82120,500
2016-05-04$11.93$11.93133,900
2016-05-03$12.25$12.25139,500
2016-05-02$12.29$12.29181,000
2016-04-29$12.30$12.30147,800
2016-04-28$12.56$12.56175,200
2016-04-27$12.50$12.50123,000
2016-04-26$12.77$12.77138,000
2016-04-25$12.76$12.76132,000
2016-04-22$13.11$13.11157,000
2016-04-21$13.05$13.05153,000
2016-04-20$12.92$12.92108,700
2016-04-19$12.89$12.89142,600
2016-04-18$12.95$12.95175,700
2016-04-15$12.72$12.72110,000
2016-04-14$12.66$12.66105,600
2016-04-13$12.75$12.75153,500
2016-04-12$12.57$12.57137,800
2016-04-11$12.44$12.44155,800
2016-04-08$12.76$12.76109,000
2016-04-07$12.92$12.92271,600
2016-04-06$13.03$13.03307,700
2016-04-05$12.52$12.52222,600
2016-04-04$12.89$12.89212,000
2016-04-01$12.70$12.70216,500
2016-03-31$12.00$12.00225,000
2016-03-30$11.93$11.93197,000
2016-03-29$12.23$12.23187,600
2016-03-28$11.61$11.61176,700
2016-03-24$11.96$11.96144,200
2016-03-23$11.92$11.92200,500
2016-03-22$12.29$12.29199,500
2016-03-21$11.94$11.94237,200
2016-03-18$11.64$11.64392,000
2016-03-17$11.33$11.33377,700
2016-03-16$12.14$12.14360,300
2016-03-15$12.72$12.72602,000
2016-03-14$11.71$11.71253,500
2016-03-11$11.37$11.37237,400
2016-03-10$11.13$11.13123,200
2016-03-09$11.24$11.24131,700
2016-03-08$11.15$11.15394,000
2016-03-07$11.58$11.58329,500
2016-03-04$11.26$11.26158,100
2016-03-03$11.10$11.10117,100
2016-03-02$11.40$11.40258,400
2016-03-01$11.20$11.20273,000
2016-02-29$10.53$10.53237,100
2016-02-26$11.17$11.17104,400
2016-02-25$11.14$11.14107,000
2016-02-24$11.20$11.20147,900
2016-02-23$11.11$11.11147,000
2016-02-22$11.46$11.46274,000
2016-02-19$11.36$11.36161,900
2016-02-18$11.18$11.18114,900
2016-02-17$11.49$11.49196,200
2016-02-16$11.11$11.11182,200
2016-02-12$11.15$11.15156,200
2016-02-11$11.00$11.00274,200
2016-02-10$11.16$11.16216,900
2016-02-09$11.03$11.03204,900
2016-02-08$11.01$11.01313,100
2016-02-05$11.05$11.05283,900
2016-02-04$11.02$11.02228,000
2016-02-03$11.39$11.39347,000
2016-02-02$11.56$11.56185,300
2016-02-01$11.95$11.95236,300
2016-01-29$12.05$12.05577,000
2016-01-28$11.89$11.89341,000
2016-01-27$11.77$11.77270,600
2016-01-26$12.00$12.00311,500
2016-01-25$12.12$12.12283,900
2016-01-22$12.25$12.25258,100
2016-01-21$12.27$12.27236,000
2016-01-20$12.52$12.52270,600
2016-01-19$12.02$12.02320,600
2016-01-15$12.29$12.29197,900
2016-01-14$12.49$12.49229,200
2016-01-13$12.26$12.26318,300
2016-01-12$12.43$12.43187,700
2016-01-11$12.28$12.28190,000
2016-01-08$12.93$12.93221,500
2016-01-07$13.20$13.20188,200
2016-01-06$13.89$13.89227,100
2016-01-05$13.89$13.89346,900
2016-01-04$13.70$13.70261,500