NASDAQ:AMSC | Historical Stock Price | AMERICAN SUPERCONDUCTOR CORP /DE/

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
1991-12-12 to 2026-09-04
Data captured

Stock Price Chart

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

$3.07$8.94$26.03$75.81$220.81$643.121991-12-122026-08-27

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

View year

Historical Stock Price — 2015

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2015-12-31$6.37$6.37196,000
2015-12-30$6.81$6.81541,700
2015-12-29$6.67$6.67119,800
2015-12-28$6.67$6.67196,000
2015-12-24$6.13$6.1354,900
2015-12-23$5.98$5.98129,900
2015-12-22$5.68$5.6874,900
2015-12-21$5.73$5.73146,200
2015-12-18$5.45$5.45222,900
2015-12-17$5.88$5.88720,500
2015-12-16$4.21$4.2119,800
2015-12-15$4.28$4.2828,800
2015-12-14$4.17$4.1779,100
2015-12-11$4.62$4.62119,500
2015-12-10$4.42$4.4295,500
2015-12-09$3.85$3.8537,900
2015-12-08$3.96$3.9632,100
2015-12-07$4.29$4.2920,600
2015-12-04$4.65$4.6516,100
2015-12-03$4.70$4.7027,100
2015-12-02$4.72$4.7228,000
2015-12-01$4.75$4.7525,700
2015-11-30$4.71$4.7189,500
2015-11-27$4.30$4.3022,200
2015-11-25$4.10$4.1023,900
2015-11-24$4.02$4.0235,800
2015-11-23$3.95$3.9568,000
2015-11-20$3.95$3.9528,500
2015-11-19$3.93$3.9353,300
2015-11-18$4.06$4.0663,400
2015-11-17$4.18$4.1827,400
2015-11-16$4.23$4.2322,500
2015-11-13$4.23$4.2322,600
2015-11-12$4.23$4.2337,200
2015-11-11$4.39$4.3924,500
2015-11-10$4.43$4.4344,900
2015-11-09$4.52$4.5222,500
2015-11-06$4.59$4.5933,900
2015-11-05$4.51$4.5132,700
2015-11-04$4.77$4.7766,000
2015-11-03$5.11$5.1176,300
2015-11-02$5.65$5.6572,700
2015-10-30$5.43$5.4370,800
2015-10-29$5.27$5.2763,300
2015-10-28$5.14$5.1431,600
2015-10-27$5.07$5.0749,800
2015-10-26$5.12$5.1233,200
2015-10-23$5.06$5.0621,500
2015-10-22$5.00$5.0017,600
2015-10-21$5.05$5.0527,800
2015-10-20$5.21$5.2123,600
2015-10-19$5.13$5.1318,400
2015-10-16$5.16$5.1625,300
2015-10-15$5.22$5.2219,900
2015-10-14$5.27$5.2722,500
2015-10-13$5.32$5.3228,400
2015-10-12$5.16$5.1612,700
2015-10-09$5.16$5.1622,300
2015-10-08$5.16$5.1647,600
2015-10-07$5.04$5.0498,800
2015-10-06$4.64$4.6426,000
2015-10-05$4.43$4.4326,400
2015-10-02$4.31$4.3121,600
2015-10-01$4.26$4.2621,600
2015-09-30$4.33$4.3338,700
2015-09-29$4.31$4.3133,700
2015-09-28$4.40$4.40111,200
2015-09-25$4.44$4.4461,300
2015-09-24$4.59$4.5922,100
2015-09-23$4.57$4.5743,300
2015-09-22$4.90$4.90111,500
2015-09-21$4.97$4.9736,000
2015-09-18$5.00$5.0047,700
2015-09-17$4.98$4.9834,200
2015-09-16$4.91$4.9138,600
2015-09-15$4.83$4.8322,600
2015-09-14$4.65$4.6559,100
2015-09-11$4.88$4.8834,500
2015-09-10$5.00$5.0044,400
2015-09-09$5.13$5.1348,200
2015-09-08$5.20$5.2075,600
2015-09-04$4.85$4.8537,900
2015-09-03$4.94$4.9482,300
2015-09-02$4.90$4.9061,600
2015-09-01$4.99$4.99233,900
2015-08-31$5.45$5.45426,200
2015-08-28$4.67$4.67104,800
2015-08-27$4.51$4.51263,100
2015-08-26$4.10$4.10144,000
2015-08-25$4.02$4.02323,200
2015-08-24$3.51$3.51139,400
2015-08-21$3.48$3.4870,300
2015-08-20$3.61$3.6181,000
2015-08-19$3.76$3.7689,200
2015-08-18$3.95$3.9568,300
2015-08-17$4.11$4.1129,900
2015-08-14$4.11$4.1145,500
2015-08-13$4.13$4.1340,400
2015-08-12$4.25$4.2572,200
2015-08-11$4.19$4.1987,500
2015-08-10$4.41$4.41135,400
2015-08-07$4.54$4.5454,400
2015-08-06$4.52$4.5267,100
2015-08-05$4.39$4.39134,800
2015-08-04$4.95$4.9552,900
2015-08-03$4.74$4.74100,500
2015-07-31$5.00$5.00173,500
2015-07-30$4.84$4.8448,500
2015-07-29$5.05$5.0541,300
2015-07-28$4.95$4.9535,500
2015-07-27$4.89$4.8934,500
2015-07-24$5.09$5.0941,300
2015-07-23$4.97$4.9758,700
2015-07-22$5.10$5.1026,900
2015-07-21$5.18$5.1844,900
2015-07-20$4.94$4.9464,000
2015-07-17$5.14$5.14110,300
2015-07-16$5.19$5.1942,400
2015-07-15$5.00$5.0040,200
2015-07-14$5.24$5.2482,300
2015-07-13$5.07$5.0768,200
2015-07-10$5.14$5.1462,900
2015-07-09$4.94$4.9452,300
2015-07-08$4.81$4.8179,400
2015-07-07$4.88$4.88103,000
2015-07-06$5.03$5.0348,600
2015-07-02$5.12$5.1224,600
2015-07-01$5.05$5.0573,400
2015-06-30$5.23$5.2354,200
2015-06-29$5.15$5.15127,400
2015-06-26$5.44$5.4454,900
2015-06-25$5.57$5.5749,600
2015-06-24$5.45$5.45117,300
2015-06-23$5.64$5.64109,700
2015-06-22$5.83$5.8368,800
2015-06-19$5.85$5.85125,200
2015-06-18$5.88$5.8838,700
2015-06-17$5.92$5.9233,400
2015-06-16$5.98$5.9830,900
2015-06-15$5.99$5.9995,800
2015-06-12$6.08$6.0831,900
2015-06-11$6.16$6.1641,900
2015-06-10$6.05$6.0554,300
2015-06-09$6.13$6.1326,200
2015-06-08$6.32$6.32306,100
2015-06-05$6.00$6.0057,000
2015-06-04$6.10$6.1059,500
2015-06-03$6.17$6.1750,800
2015-06-02$6.26$6.26121,400
2015-06-01$6.03$6.03171,400
2015-05-29$6.19$6.19124,900
2015-05-28$6.22$6.22219,200
2015-05-27$6.48$6.48130,000
2015-05-26$6.35$6.3587,900
2015-05-22$6.32$6.3256,600
2015-05-21$6.40$6.4044,900
2015-05-20$6.33$6.3383,900
2015-05-19$6.43$6.43222,800
2015-05-18$6.40$6.4078,100
2015-05-15$6.43$6.4368,900
2015-05-14$6.47$6.4755,600
2015-05-13$6.50$6.50115,300
2015-05-12$6.54$6.5496,300
2015-05-11$6.54$6.5485,700
2015-05-08$6.51$6.5191,200
2015-05-07$6.55$6.5577,200
2015-05-06$6.51$6.51138,100
2015-05-05$6.67$6.67225,500
2015-05-04$6.49$6.49131,500
2015-05-01$6.64$6.64128,100
2015-04-30$6.47$6.47289,300
2015-04-29$6.70$6.70123,100
2015-04-28$6.70$6.70193,500
2015-04-27$7.00$7.00317,000
2015-04-24$6.88$6.882,450,300
2015-04-23$10.00$10.00215,700
2015-04-22$10.40$10.40461,100
2015-04-21$9.20$9.20279,000
2015-04-20$7.74$7.7442,300
2015-04-17$7.59$7.59108,800
2015-04-16$7.98$7.98102,600
2015-04-15$7.76$7.76125,900
2015-04-14$7.28$7.2852,500
2015-04-13$7.21$7.2150,500
2015-04-10$7.20$7.2045,200
2015-04-09$7.11$7.1135,700
2015-04-08$7.18$7.1828,400
2015-04-07$7.11$7.1163,400
2015-04-06$7.11$7.1187,600
2015-04-02$6.85$6.8551,400
2015-04-01$6.38$6.3862,100
2015-03-31$6.44$6.4482,300
2015-03-30$6.43$6.43100,500
2015-03-27$6.38$6.3850,300
2015-03-26$6.77$6.77103,300
2015-03-25$7.20$7.20191,000
2015-03-24$7.00$7.0048,970
2015-03-23$7.30$7.3026,470
2015-03-20$7.00$7.0031,150
2015-03-19$7.10$7.1018,580
2015-03-18$7.30$7.3030,650
2015-03-17$7.60$7.6023,870
2015-03-16$7.40$7.4016,740
2015-03-13$7.60$7.6024,970
2015-03-12$7.60$7.6057,330
2015-03-11$7.90$7.9020,350
2015-03-10$8.00$8.0014,310
2015-03-09$8.10$8.1034,650
2015-03-06$8.10$8.1021,030
2015-03-05$8.20$8.2042,660
2015-03-04$8.00$8.0022,050
2015-03-03$7.70$7.7011,160
2015-03-02$7.70$7.7043,090
2015-02-27$8.30$8.3016,260
2015-02-26$8.60$8.6062,700
2015-02-25$8.60$8.60136,010
2015-02-24$8.00$8.0040,430
2015-02-23$7.80$7.8013,870
2015-02-20$7.70$7.7027,000
2015-02-19$7.70$7.7011,420
2015-02-18$7.80$7.806,330
2015-02-17$7.90$7.9014,020
2015-02-13$8.00$8.0044,120
2015-02-12$7.80$7.8022,830
2015-02-11$7.40$7.4045,270
2015-02-10$8.00$8.0024,780
2015-02-09$7.80$7.8063,960
2015-02-06$7.60$7.6083,550
2015-02-05$7.20$7.2082,440
2015-02-04$7.40$7.4035,860
2015-02-03$7.60$7.6057,080
2015-02-02$7.30$7.3027,640
2015-01-30$7.00$7.0021,230
2015-01-29$7.00$7.0045,980
2015-01-28$6.60$6.6048,450
2015-01-27$6.60$6.6028,590
2015-01-26$7.00$7.0065,560
2015-01-23$6.30$6.3052,430
2015-01-22$6.10$6.1096,350
2015-01-21$6.20$6.20132,300
2015-01-20$6.60$6.60155,480
2015-01-16$7.60$7.6064,980
2015-01-15$7.40$7.4059,070
2015-01-14$7.70$7.7059,490
2015-01-13$7.60$7.6055,510
2015-01-12$7.80$7.8058,250
2015-01-09$8.10$8.1049,500
2015-01-08$8.20$8.2034,100
2015-01-07$8.00$8.0039,980
2015-01-06$8.00$8.0077,570
2015-01-05$7.90$7.9054,140
2015-01-02$8.20$8.2042,430