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.

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Historical Stock Price — 2014

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2014-12-31$11.61$11.61100,500
2014-12-30$11.51$11.5166,000
2014-12-29$11.72$11.7261,200
2014-12-26$11.84$11.84127,200
2014-12-24$11.74$11.7473,500
2014-12-23$11.83$11.83110,900
2014-12-22$12.20$12.20199,500
2014-12-19$12.04$12.041,255,400
2014-12-18$11.90$11.90191,000
2014-12-17$11.94$11.94148,200
2014-12-16$11.28$11.28143,700
2014-12-15$11.03$11.03268,900
2014-12-12$11.73$11.73158,400
2014-12-11$11.71$11.7187,500
2014-12-10$11.91$11.91122,900
2014-12-09$12.03$12.03324,700
2014-12-08$12.39$12.39146,600
2014-12-05$12.13$12.13120,900
2014-12-04$11.84$11.84117,000
2014-12-03$11.43$11.43130,700
2014-12-02$11.00$11.00330,600
2014-12-01$10.88$10.8889,400
2014-11-28$10.43$10.4337,600
2014-11-26$10.61$10.6180,900
2014-11-25$10.62$10.6272,900
2014-11-24$10.60$10.6024,400
2014-11-21$10.56$10.5664,200
2014-11-20$10.48$10.4852,100
2014-11-19$10.21$10.2158,600
2014-11-18$10.37$10.37150,900
2014-11-17$10.32$10.32123,500
2014-11-14$10.25$10.2562,400
2014-11-13$10.63$10.63293,300
2014-11-12$10.05$10.05120,500
2014-11-11$9.93$9.93216,800
2014-11-10$10.03$10.0376,100
2014-11-07$10.09$10.0930,100
2014-11-06$10.17$10.1751,300
2014-11-05$9.95$9.9586,500
2014-11-04$10.00$10.0027,200
2014-11-03$10.00$10.0058,700
2014-10-31$10.14$10.1463,600
2014-10-30$9.94$9.9438,100
2014-10-29$9.96$9.96113,400
2014-10-28$10.21$10.2196,200
2014-10-27$10.14$10.14105,500
2014-10-24$10.07$10.0742,100
2014-10-23$10.09$10.0954,000
2014-10-22$10.17$10.1765,400
2014-10-21$10.22$10.2255,000
2014-10-20$10.31$10.3174,900
2014-10-17$10.39$10.3980,800
2014-10-16$10.97$10.9774,500
2014-10-15$10.49$10.49136,700
2014-10-14$10.99$10.9964,300
2014-10-13$11.03$11.0359,800
2014-10-10$10.94$10.9458,500
2014-10-09$11.02$11.0289,400
2014-10-08$11.00$11.00123,600
2014-10-07$10.91$10.9172,800
2014-10-06$11.35$11.3556,400
2014-10-03$11.41$11.4174,300
2014-10-02$11.15$11.1569,400
2014-10-01$11.12$11.12156,800
2014-09-30$11.65$11.651,106,700
2014-09-29$11.96$11.96139,900
2014-09-26$11.83$11.83102,900
2014-09-25$12.00$12.00106,900
2014-09-24$12.00$12.00105,100
2014-09-23$11.49$11.4966,600
2014-09-22$10.95$10.95106,100
2014-09-19$11.28$11.28291,100
2014-09-18$11.96$11.9651,400
2014-09-17$11.99$11.9971,300
2014-09-16$12.18$12.18182,300
2014-09-15$12.19$12.19110,200
2014-09-12$11.91$11.9175,400
2014-09-11$12.14$12.1479,600
2014-09-10$12.23$12.23198,700
2014-09-09$11.97$11.9750,800
2014-09-08$11.91$11.9185,600
2014-09-05$11.92$11.92152,000
2014-09-04$11.86$11.8675,900
2014-09-03$11.99$11.9957,200
2014-09-02$12.00$12.00115,400
2014-08-29$12.09$12.09155,000
2014-08-28$11.58$11.5850,600
2014-08-27$11.36$11.36107,800
2014-08-26$11.50$11.50154,700
2014-08-25$11.46$11.46183,400
2014-08-22$10.12$10.1264,300
2014-08-21$10.07$10.0741,500
2014-08-20$10.08$10.0864,000
2014-08-19$10.01$10.01101,200
2014-08-18$10.02$10.0242,700
2014-08-15$10.15$10.15159,000
2014-08-14$10.13$10.1347,900
2014-08-13$10.15$10.15197,800
2014-08-12$10.20$10.2091,900
2014-08-11$10.00$10.00191,100
2014-08-08$10.00$10.00194,800
2014-08-07$9.45$9.45165,300
2014-08-06$9.44$9.44210,900
2014-08-05$8.75$8.7538,600
2014-08-04$8.83$8.8324,400
2014-08-01$8.84$8.8438,300
2014-07-31$8.88$8.8830,200
2014-07-30$9.04$9.0483,600
2014-07-29$9.12$9.1283,000
2014-07-28$8.97$8.9746,200
2014-07-25$8.98$8.98131,900
2014-07-24$9.22$9.22116,500
2014-07-23$9.14$9.14112,100
2014-07-22$9.50$9.50264,100
2014-07-21$9.35$9.35105,700
2014-07-18$9.55$9.5595,700
2014-07-17$9.58$9.5831,600
2014-07-16$9.65$9.65216,100
2014-07-15$9.49$9.49170,100
2014-07-14$9.83$9.8375,900
2014-07-11$9.29$9.2979,700
2014-07-10$8.69$8.6988,300
2014-07-09$9.05$9.0525,100
2014-07-08$9.00$9.0096,100
2014-07-07$8.75$8.75102,900
2014-07-03$9.07$9.0729,300
2014-07-02$9.14$9.14618,200
2014-07-01$9.75$9.75204,800
2014-06-30$10.01$10.01183,800
2014-06-27$10.50$10.50395,600
2014-06-26$10.01$10.011,412,900
2014-06-25$8.75$8.754,159,700