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 — 2017

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2017-12-29$3.63$3.63255,900
2017-12-28$3.71$3.71107,200
2017-12-27$3.82$3.82121,900
2017-12-26$3.71$3.71177,700
2017-12-22$3.56$3.5680,700
2017-12-21$3.51$3.51338,300
2017-12-20$3.36$3.3668,000
2017-12-19$3.41$3.4169,300
2017-12-18$3.35$3.35100,300
2017-12-15$3.30$3.3084,800
2017-12-14$3.26$3.26100,700
2017-12-13$3.21$3.2166,100
2017-12-12$3.15$3.1586,500
2017-12-11$3.20$3.2086,600
2017-12-08$3.28$3.2856,100
2017-12-07$3.21$3.21133,000
2017-12-06$3.26$3.26144,400
2017-12-05$3.30$3.30521,500
2017-12-04$3.28$3.28754,800
2017-12-01$3.24$3.24132,400
2017-11-30$3.33$3.33192,000
2017-11-29$3.53$3.53510,300
2017-11-28$3.33$3.33398,900
2017-11-27$3.34$3.3464,900
2017-11-24$3.23$3.2327,700
2017-11-22$3.21$3.2183,000
2017-11-21$3.30$3.3087,000
2017-11-20$3.29$3.29116,000
2017-11-17$3.25$3.25139,800
2017-11-16$3.33$3.33421,300
2017-11-15$3.31$3.31270,300
2017-11-14$3.24$3.24151,200
2017-11-13$3.48$3.48132,300
2017-11-10$3.68$3.68102,800
2017-11-09$3.73$3.73135,200
2017-11-08$3.74$3.74337,800
2017-11-07$4.20$4.2050,200
2017-11-06$4.27$4.27138,700
2017-11-03$4.06$4.0613,100
2017-11-02$4.08$4.0839,400
2017-11-01$4.10$4.1035,900
2017-10-31$4.20$4.2050,200
2017-10-30$4.17$4.1777,600
2017-10-27$4.32$4.3245,600
2017-10-26$4.20$4.2040,600
2017-10-25$4.20$4.2078,200
2017-10-24$4.21$4.2137,600
2017-10-23$4.21$4.2147,600
2017-10-20$4.37$4.3759,200
2017-10-19$4.36$4.3655,500
2017-10-18$4.43$4.4332,800
2017-10-17$4.44$4.44141,600
2017-10-16$4.48$4.4838,100
2017-10-13$4.49$4.4933,300
2017-10-12$4.51$4.5139,800
2017-10-11$4.55$4.5527,200
2017-10-10$4.58$4.5886,200
2017-10-09$4.65$4.65164,500
2017-10-06$4.71$4.7177,400
2017-10-05$4.70$4.7078,800
2017-10-04$4.57$4.5735,800
2017-10-03$4.69$4.6946,100
2017-10-02$4.62$4.6297,300
2017-09-29$4.54$4.54129,500
2017-09-28$4.29$4.2980,900
2017-09-27$4.41$4.41131,400
2017-09-26$4.03$4.0390,300
2017-09-25$4.02$4.02120,800
2017-09-22$4.14$4.14109,700
2017-09-21$4.11$4.11148,900
2017-09-20$4.36$4.3653,800
2017-09-19$4.33$4.33148,300
2017-09-18$4.57$4.57353,200
2017-09-15$4.88$4.88464,400
2017-09-14$4.21$4.21232,500
2017-09-13$3.83$3.8347,100
2017-09-12$3.83$3.8382,400
2017-09-11$3.75$3.75212,700
2017-09-08$3.85$3.85159,600
2017-09-07$4.17$4.17662,100
2017-09-06$3.90$3.9091,500
2017-09-05$3.85$3.85102,700
2017-09-01$3.83$3.8348,300
2017-08-31$3.88$3.8885,300
2017-08-30$3.90$3.9087,000
2017-08-29$3.86$3.8694,700
2017-08-28$3.87$3.8772,600
2017-08-25$3.90$3.90272,400
2017-08-24$3.74$3.7451,700
2017-08-23$3.68$3.68206,200
2017-08-22$3.87$3.87312,200
2017-08-21$3.94$3.94438,500
2017-08-18$3.59$3.59176,300
2017-08-17$3.37$3.3785,800
2017-08-16$3.47$3.47111,800
2017-08-15$3.47$3.47167,100
2017-08-14$3.52$3.52295,700
2017-08-11$3.23$3.23148,500
2017-08-10$3.25$3.25186,600
2017-08-09$3.30$3.30381,600
2017-08-08$2.97$2.97306,400
2017-08-07$3.02$3.02194,800
2017-08-04$3.13$3.13136,100
2017-08-03$3.01$3.01186,800
2017-08-02$3.13$3.13111,700
2017-08-01$3.11$3.11272,700
2017-07-31$3.19$3.19192,000
2017-07-28$3.35$3.35275,300
2017-07-27$3.36$3.36183,100
2017-07-26$3.43$3.43228,300
2017-07-25$3.51$3.51130,100
2017-07-24$3.57$3.57364,100
2017-07-21$3.60$3.601,004,700
2017-07-20$4.21$4.21189,500
2017-07-19$4.31$4.31156,600
2017-07-18$4.21$4.21108,000
2017-07-17$4.32$4.32126,900
2017-07-14$4.43$4.4389,700
2017-07-13$4.41$4.4182,100
2017-07-12$4.31$4.31136,700
2017-07-11$4.26$4.26112,800
2017-07-10$4.41$4.41158,500
2017-07-07$4.55$4.5543,600
2017-07-06$4.53$4.5384,300
2017-07-05$4.59$4.59107,700
2017-07-03$4.77$4.7779,900
2017-06-30$4.62$4.6270,800
2017-06-29$4.62$4.62155,100
2017-06-28$4.63$4.63154,600
2017-06-27$4.56$4.5688,300
2017-06-26$4.48$4.48147,700
2017-06-23$4.48$4.481,278,400
2017-06-22$4.49$4.49102,600
2017-06-21$4.48$4.48152,700
2017-06-20$4.58$4.5881,600
2017-06-19$4.57$4.5771,300
2017-06-16$4.58$4.58113,100
2017-06-15$4.63$4.6375,600
2017-06-14$4.67$4.67194,400
2017-06-13$4.33$4.3391,600
2017-06-12$4.35$4.35151,100
2017-06-09$4.76$4.76200,100
2017-06-08$4.59$4.59103,300
2017-06-07$4.43$4.4393,100
2017-06-06$4.40$4.4098,800
2017-06-05$4.21$4.2170,200
2017-06-02$4.22$4.22186,100
2017-06-01$4.31$4.31123,000
2017-05-31$4.12$4.12142,700
2017-05-30$4.05$4.05193,200
2017-05-26$4.21$4.2162,800
2017-05-25$4.29$4.29243,500
2017-05-24$4.12$4.1285,700
2017-05-23$4.20$4.2097,300
2017-05-22$4.20$4.2099,400
2017-05-19$4.14$4.14179,300
2017-05-18$4.05$4.05153,200
2017-05-17$4.08$4.08200,600
2017-05-16$4.15$4.15153,600
2017-05-15$4.23$4.23400,900
2017-05-12$4.06$4.06108,500
2017-05-11$4.02$4.02231,100
2017-05-10$4.05$4.05147,100
2017-05-09$4.11$4.11153,100
2017-05-08$4.06$4.06192,700
2017-05-05$4.00$4.001,577,500
2017-05-04$4.85$4.85151,400
2017-05-03$4.71$4.71126,800
2017-05-02$4.85$4.85183,300
2017-05-01$4.94$4.94373,900
2017-04-28$5.21$5.21302,300
2017-04-27$5.61$5.61804,300
2017-04-26$7.70$7.70181,100
2017-04-25$7.40$7.40162,600
2017-04-24$7.07$7.0761,400
2017-04-21$6.93$6.9379,500
2017-04-20$6.77$6.7758,600
2017-04-19$6.72$6.7246,900
2017-04-18$6.64$6.6440,700
2017-04-17$6.69$6.6948,300
2017-04-13$6.82$6.8263,400
2017-04-12$7.03$7.0375,700
2017-04-11$6.97$6.9785,800
2017-04-10$6.85$6.8563,000
2017-04-07$6.71$6.71100,100
2017-04-06$6.71$6.71113,300
2017-04-05$6.44$6.4471,400
2017-04-04$6.62$6.6249,800
2017-04-03$6.67$6.6777,800
2017-03-31$6.86$6.8669,000
2017-03-30$6.95$6.9582,000
2017-03-29$6.77$6.77122,900
2017-03-28$6.33$6.3326,500
2017-03-27$6.28$6.2858,400
2017-03-24$6.24$6.2433,700
2017-03-23$6.36$6.3635,100
2017-03-22$6.46$6.4687,000
2017-03-21$6.51$6.51112,900
2017-03-20$6.39$6.3943,700
2017-03-17$6.40$6.40108,700
2017-03-16$6.28$6.2832,400
2017-03-15$6.35$6.3582,400
2017-03-14$6.07$6.0798,700
2017-03-13$6.15$6.1594,800
2017-03-10$6.02$6.0270,400
2017-03-09$5.94$5.9468,300
2017-03-08$6.01$6.0192,800
2017-03-07$6.20$6.2066,100
2017-03-06$6.35$6.3568,200
2017-03-03$6.43$6.4359,400
2017-03-02$6.42$6.42123,600
2017-03-01$6.22$6.2253,000
2017-02-28$6.11$6.1193,900
2017-02-27$6.40$6.4060,900
2017-02-24$6.35$6.3560,400
2017-02-23$6.42$6.42154,600
2017-02-22$6.53$6.5363,900
2017-02-21$6.67$6.6756,900
2017-02-17$6.62$6.6277,100
2017-02-16$6.74$6.7457,500
2017-02-15$6.76$6.7678,800
2017-02-14$6.74$6.74138,500
2017-02-13$6.86$6.86163,200
2017-02-10$6.66$6.66101,900
2017-02-09$6.63$6.63143,500
2017-02-08$6.52$6.52120,300
2017-02-07$6.79$6.79262,900
2017-02-06$7.25$7.25344,500
2017-02-03$7.04$7.04190,500
2017-02-02$7.02$7.0252,700
2017-02-01$7.04$7.0439,000
2017-01-31$6.99$6.9960,000
2017-01-30$7.10$7.1071,700
2017-01-27$7.12$7.1228,800
2017-01-26$7.21$7.2136,700
2017-01-25$7.17$7.1777,600
2017-01-24$7.17$7.17106,900
2017-01-23$7.03$7.0384,400
2017-01-20$7.15$7.1530,600
2017-01-19$7.27$7.2749,700
2017-01-18$7.17$7.1718,700
2017-01-17$7.18$7.1836,800
2017-01-13$7.30$7.3018,900
2017-01-12$7.22$7.2217,100
2017-01-11$7.27$7.2728,600
2017-01-10$7.19$7.1923,100
2017-01-09$7.12$7.12103,600
2017-01-06$7.35$7.35104,800
2017-01-05$7.24$7.2424,200
2017-01-04$7.41$7.4128,700
2017-01-03$7.42$7.4228,200