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.

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Historical Stock Price — 2018

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2018-12-31$11.15$11.15214,000
2018-12-28$10.96$10.96416,700
2018-12-27$9.63$9.63168,800
2018-12-26$9.65$9.65191,700
2018-12-24$9.14$9.14165,900
2018-12-21$9.32$9.32402,000
2018-12-20$9.72$9.72791,700
2018-12-19$12.32$12.32605,900
2018-12-18$11.82$11.82288,600
2018-12-17$11.64$11.64315,400
2018-12-14$11.62$11.62289,900
2018-12-13$11.13$11.13442,700
2018-12-12$11.82$11.82349,500
2018-12-11$11.27$11.27260,500
2018-12-10$10.85$10.85179,000
2018-12-07$10.70$10.70214,900
2018-12-06$10.83$10.83271,600
2018-12-04$10.57$10.57467,500
2018-12-03$10.77$10.77428,400
2018-11-30$10.00$10.00256,000
2018-11-29$9.57$9.57248,800
2018-11-28$9.39$9.39321,900
2018-11-27$8.99$8.99174,100
2018-11-26$8.85$8.85118,700
2018-11-23$8.36$8.3637,100
2018-11-21$8.20$8.20114,100
2018-11-20$8.22$8.22157,800
2018-11-19$8.56$8.56207,200
2018-11-16$8.88$8.8898,000
2018-11-15$8.84$8.84131,700
2018-11-14$8.76$8.76260,100
2018-11-13$9.72$9.72278,200
2018-11-12$9.35$9.35195,800
2018-11-09$9.17$9.17390,200
2018-11-08$9.48$9.48440,500
2018-11-07$9.35$9.351,096,500
2018-11-06$7.54$7.54120,700
2018-11-05$7.55$7.55107,600
2018-11-02$7.85$7.85528,700
2018-11-01$7.55$7.55675,500
2018-10-31$5.99$5.9973,700
2018-10-30$6.07$6.0745,100
2018-10-29$5.92$5.92140,900
2018-10-26$6.06$6.06105,000
2018-10-25$6.07$6.0737,300
2018-10-24$6.01$6.0161,800
2018-10-23$6.27$6.2767,400
2018-10-22$6.32$6.32122,400
2018-10-19$6.79$6.7959,300
2018-10-18$6.76$6.7664,000
2018-10-17$6.66$6.6662,800
2018-10-16$6.52$6.5241,800
2018-10-15$6.53$6.5336,600
2018-10-12$6.29$6.2931,000
2018-10-11$6.20$6.2073,500
2018-10-10$6.44$6.44203,600
2018-10-09$6.86$6.8634,900
2018-10-08$6.87$6.8781,800
2018-10-05$7.06$7.06149,700
2018-10-04$7.01$7.0190,800
2018-10-03$7.00$7.0062,400
2018-10-02$6.80$6.8061,700
2018-10-01$6.85$6.8542,600
2018-09-28$6.95$6.95138,500
2018-09-27$7.02$7.02132,500
2018-09-26$6.92$6.92145,500
2018-09-25$6.60$6.60154,800
2018-09-24$6.33$6.33131,400
2018-09-21$6.58$6.58184,900
2018-09-20$7.33$7.33167,700
2018-09-19$6.31$6.31131,500
2018-09-18$6.39$6.3957,400
2018-09-17$6.47$6.4767,700
2018-09-14$6.53$6.5380,800
2018-09-13$6.55$6.55201,700
2018-09-12$6.00$6.0083,500
2018-09-11$5.72$5.7299,200
2018-09-10$5.61$5.6185,000
2018-09-07$5.64$5.6472,900
2018-09-06$5.75$5.75100,200
2018-09-05$5.78$5.78122,100
2018-09-04$5.99$5.9983,500
2018-08-31$6.10$6.1074,600
2018-08-30$6.39$6.3932,000
2018-08-29$6.48$6.4858,500
2018-08-28$6.46$6.4648,300
2018-08-27$6.41$6.4137,100
2018-08-24$6.42$6.4261,100
2018-08-23$6.42$6.4255,700
2018-08-22$6.43$6.4340,700
2018-08-21$6.38$6.3876,000
2018-08-20$6.18$6.1861,900
2018-08-17$6.06$6.0651,100
2018-08-16$6.03$6.03183,600
2018-08-15$6.20$6.2067,200
2018-08-14$6.20$6.20116,800
2018-08-13$6.35$6.35187,100
2018-08-10$6.36$6.3688,800
2018-08-09$6.45$6.45104,300
2018-08-08$6.31$6.31136,700
2018-08-07$6.30$6.30456,500
2018-08-06$5.78$5.78125,900
2018-08-03$5.70$5.70126,000
2018-08-02$5.74$5.74190,600
2018-08-01$5.80$5.80498,400
2018-07-31$5.18$5.18101,100
2018-07-30$5.07$5.0782,600
2018-07-27$5.03$5.03141,300
2018-07-26$5.05$5.05113,000
2018-07-25$4.94$4.94108,400
2018-07-24$4.93$4.93231,800
2018-07-23$5.07$5.07194,800
2018-07-20$5.12$5.12114,700
2018-07-19$5.22$5.22159,200
2018-07-18$5.14$5.14434,000
2018-07-17$4.90$4.90298,800
2018-07-16$4.94$4.94173,600
2018-07-13$5.09$5.09138,600
2018-07-12$5.00$5.00174,200
2018-07-11$5.07$5.07491,900
2018-07-10$5.32$5.32328,200
2018-07-09$5.22$5.22871,500
2018-07-06$5.75$5.75367,600
2018-07-05$5.95$5.95921,400
2018-07-03$7.06$7.0680,200
2018-07-02$7.39$7.39154,100
2018-06-29$7.00$7.00137,500
2018-06-28$7.22$7.22101,700
2018-06-27$7.31$7.31202,900
2018-06-26$7.74$7.74124,700
2018-06-25$7.62$7.62156,100
2018-06-22$7.69$7.69336,900
2018-06-21$7.08$7.0886,600
2018-06-20$7.12$7.12174,000
2018-06-19$6.81$6.8159,300
2018-06-18$6.89$6.8991,100
2018-06-15$6.90$6.9080,600
2018-06-14$6.63$6.63106,200
2018-06-13$6.65$6.6563,800
2018-06-12$6.65$6.65119,800
2018-06-11$6.54$6.54129,400
2018-06-08$6.36$6.36318,400
2018-06-07$6.48$6.48759,600
2018-06-06$7.00$7.00118,700
2018-06-05$6.94$6.9477,400
2018-06-04$6.92$6.92103,100
2018-06-01$6.72$6.72105,900
2018-05-31$6.96$6.96195,700
2018-05-30$6.92$6.92169,700
2018-05-29$6.29$6.29121,200
2018-05-25$6.45$6.45116,600
2018-05-24$6.67$6.6795,100
2018-05-23$6.84$6.8469,500
2018-05-22$6.82$6.82103,100
2018-05-21$6.71$6.7150,000
2018-05-18$6.71$6.7157,700
2018-05-17$6.70$6.7047,300
2018-05-16$6.79$6.79117,200
2018-05-15$6.73$6.7382,000
2018-05-14$6.88$6.88109,400
2018-05-11$6.89$6.8998,600
2018-05-10$6.99$6.99231,300
2018-05-09$6.38$6.3863,400
2018-05-08$6.32$6.3296,800
2018-05-07$6.18$6.1855,600
2018-05-04$6.06$6.0691,700
2018-05-03$6.02$6.0255,200
2018-05-02$6.15$6.1597,000
2018-05-01$5.98$5.9867,200
2018-04-30$5.90$5.9067,600
2018-04-27$5.92$5.9263,100
2018-04-26$6.04$6.0467,300
2018-04-25$6.08$6.08100,300
2018-04-24$6.08$6.08178,300
2018-04-23$6.25$6.2572,100
2018-04-20$6.32$6.32106,000
2018-04-19$6.51$6.51244,500
2018-04-18$6.37$6.37194,800
2018-04-17$6.19$6.1974,200
2018-04-16$6.08$6.08166,400
2018-04-13$6.32$6.32251,100
2018-04-12$6.16$6.1653,400
2018-04-11$6.04$6.04183,800
2018-04-10$6.02$6.0285,200
2018-04-09$5.93$5.93235,700
2018-04-06$5.85$5.85131,000
2018-04-05$6.19$6.19136,700
2018-04-04$5.93$5.93107,100
2018-04-03$5.80$5.8098,400
2018-04-02$5.60$5.6091,400
2018-03-29$5.82$5.82138,500
2018-03-28$5.39$5.39196,600
2018-03-27$5.51$5.51168,500
2018-03-26$5.54$5.54170,700
2018-03-23$5.57$5.57207,600
2018-03-22$5.76$5.76181,100
2018-03-21$6.00$6.00148,000
2018-03-20$6.11$6.11346,100
2018-03-19$6.18$6.18200,000
2018-03-16$6.13$6.13388,900
2018-03-15$5.53$5.5367,200
2018-03-14$5.52$5.52147,400
2018-03-13$5.71$5.71141,700
2018-03-12$5.74$5.74384,000
2018-03-09$5.06$5.0693,300
2018-03-08$5.04$5.0479,300
2018-03-07$5.13$5.13173,900
2018-03-06$5.15$5.1552,000
2018-03-05$5.22$5.22188,700
2018-03-02$4.87$4.87103,400
2018-03-01$4.82$4.82170,000
2018-02-28$4.73$4.7356,000
2018-02-27$4.90$4.90163,300
2018-02-26$4.89$4.8998,600
2018-02-23$5.02$5.0283,700
2018-02-22$4.76$4.7683,700
2018-02-21$4.85$4.85183,400
2018-02-20$4.71$4.7182,100
2018-02-16$4.61$4.6158,300
2018-02-15$4.68$4.6879,100
2018-02-14$4.68$4.6897,600
2018-02-13$4.60$4.60227,400
2018-02-12$4.60$4.60197,000
2018-02-09$4.39$4.39235,700
2018-02-08$4.51$4.51199,000
2018-02-07$4.88$4.88254,500
2018-02-06$4.56$4.56710,900
2018-02-05$5.08$5.08148,800
2018-02-02$5.17$5.17201,200
2018-02-01$5.34$5.34273,500
2018-01-31$5.21$5.2194,700
2018-01-30$5.28$5.28195,300
2018-01-29$5.44$5.44138,700
2018-01-26$5.50$5.50210,300
2018-01-25$5.40$5.40633,900
2018-01-24$5.70$5.702,927,500
2018-01-23$5.07$5.07110,000
2018-01-22$5.10$5.1086,900
2018-01-19$5.17$5.17155,600
2018-01-18$5.30$5.30180,600
2018-01-17$5.20$5.20235,200
2018-01-16$5.49$5.49295,900
2018-01-12$5.52$5.52346,600
2018-01-11$5.46$5.46491,600
2018-01-10$4.91$4.91242,800
2018-01-09$4.86$4.86540,900
2018-01-08$4.89$4.891,484,500
2018-01-05$4.50$4.50275,800
2018-01-04$4.22$4.22237,800
2018-01-03$4.03$4.03151,000
2018-01-02$3.81$3.8186,300