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 — 2021

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2021-12-31$10.88$10.88144,500
2021-12-30$10.97$10.97423,500
2021-12-29$10.75$10.75262,100
2021-12-28$10.89$10.89185,000
2021-12-27$11.20$11.20178,400
2021-12-23$11.66$11.66210,300
2021-12-22$11.29$11.29139,400
2021-12-21$11.41$11.41188,100
2021-12-20$10.87$10.87262,100
2021-12-17$11.16$11.161,073,300
2021-12-16$10.99$10.99251,300
2021-12-15$11.08$11.08302,200
2021-12-14$10.78$10.78261,700
2021-12-13$11.47$11.47293,200
2021-12-10$11.26$11.26168,800
2021-12-09$11.65$11.65125,300
2021-12-08$12.04$12.04146,200
2021-12-07$11.65$11.65211,000
2021-12-06$11.24$11.24240,300
2021-12-03$11.26$11.26292,100
2021-12-02$12.00$12.00316,800
2021-12-01$12.19$12.19217,600
2021-11-30$12.80$12.80268,800
2021-11-29$12.91$12.91258,400
2021-11-26$13.28$13.28123,800
2021-11-24$13.68$13.68103,600
2021-11-23$13.54$13.54174,000
2021-11-22$13.66$13.66194,300
2021-11-19$14.30$14.30144,000
2021-11-18$14.18$14.18252,400
2021-11-17$14.82$14.82223,300
2021-11-16$15.35$15.35141,900
2021-11-15$15.65$15.65179,300
2021-11-12$16.04$16.04270,600
2021-11-11$16.47$16.47274,800
2021-11-10$16.17$16.17336,500
2021-11-09$17.24$17.24454,400
2021-11-08$18.28$18.28345,100
2021-11-05$17.65$17.65191,400
2021-11-04$17.80$17.80228,600
2021-11-03$18.17$18.17256,100
2021-11-02$18.24$18.24238,200
2021-11-01$19.29$19.29203,800
2021-10-29$18.38$18.38138,100
2021-10-28$18.20$18.20230,700
2021-10-27$17.15$17.15136,000
2021-10-26$17.25$17.25133,700
2021-10-25$17.25$17.25134,300
2021-10-22$17.14$17.14122,000
2021-10-21$17.15$17.1598,700
2021-10-20$17.20$17.20123,700
2021-10-19$17.31$17.31160,600
2021-10-18$16.64$16.64223,300
2021-10-15$16.75$16.75193,000
2021-10-14$16.95$16.95164,300
2021-10-13$16.91$16.91488,700
2021-10-12$16.31$16.31256,500
2021-10-11$15.94$15.94241,500
2021-10-08$15.14$15.14177,600
2021-10-07$15.42$15.42367,600
2021-10-06$14.37$14.37200,100
2021-10-05$14.11$14.11237,500
2021-10-04$14.17$14.17288,500
2021-10-01$14.58$14.58291,500
2021-09-30$14.58$14.58442,000
2021-09-29$13.56$13.56645,900
2021-09-28$14.27$14.27358,200
2021-09-27$14.64$14.64390,200
2021-09-24$13.67$13.67344,100
2021-09-23$13.92$13.92279,800
2021-09-22$13.91$13.91224,700
2021-09-21$13.31$13.31201,300
2021-09-20$13.23$13.23297,900
2021-09-17$13.60$13.60491,100
2021-09-16$12.88$12.88310,000
2021-09-15$13.11$13.11232,400
2021-09-14$13.40$13.40172,600
2021-09-13$13.75$13.75169,200
2021-09-10$13.65$13.65223,300
2021-09-09$13.54$13.54227,700
2021-09-08$13.39$13.39264,200
2021-09-07$14.28$14.28252,000
2021-09-03$14.17$14.17200,600
2021-09-02$14.01$14.01276,500
2021-09-01$13.99$13.99664,700
2021-08-31$14.90$14.901,882,500
2021-08-30$12.34$12.34141,400
2021-08-27$12.54$12.54180,400
2021-08-26$12.50$12.50330,000
2021-08-25$12.16$12.16185,400
2021-08-24$12.10$12.10239,000
2021-08-23$12.14$12.14201,300
2021-08-20$11.47$11.47181,100
2021-08-19$11.44$11.44204,100
2021-08-18$11.86$11.86210,700
2021-08-17$11.85$11.85164,700
2021-08-16$12.22$12.22177,600
2021-08-13$12.63$12.63196,800
2021-08-12$13.35$13.35195,400
2021-08-11$13.64$13.64240,800
2021-08-10$14.52$14.52344,900
2021-08-09$13.63$13.63279,000
2021-08-06$12.69$12.69307,000
2021-08-05$12.54$12.54719,500
2021-08-04$12.99$12.99316,500
2021-08-03$13.50$13.50182,600
2021-08-02$13.87$13.87131,100
2021-07-30$14.05$14.05120,100
2021-07-29$14.22$14.22139,000
2021-07-28$14.50$14.50215,500
2021-07-27$13.70$13.70313,100
2021-07-26$14.08$14.08181,400
2021-07-23$14.13$14.13120,400
2021-07-22$14.48$14.48138,000
2021-07-21$15.06$15.06284,100
2021-07-20$14.16$14.16462,300
2021-07-19$13.51$13.51332,800
2021-07-16$13.80$13.80418,700
2021-07-15$14.62$14.62165,100
2021-07-14$14.75$14.75175,400
2021-07-13$15.49$15.49139,400
2021-07-12$16.13$16.13113,200
2021-07-09$16.14$16.14169,300
2021-07-08$15.78$15.78255,100
2021-07-07$16.07$16.07286,300
2021-07-06$17.56$17.56224,400
2021-07-02$17.37$17.37184,700
2021-07-01$17.79$17.79295,700
2021-06-30$17.39$17.39319,500
2021-06-29$18.26$18.261,121,100
2021-06-28$18.38$18.38336,300
2021-06-25$17.58$17.58712,100
2021-06-24$17.69$17.69494,300
2021-06-23$16.93$16.93742,100
2021-06-22$15.51$15.51272,400
2021-06-21$14.92$14.92299,600
2021-06-18$14.49$14.491,362,800
2021-06-17$15.04$15.04245,000
2021-06-16$15.31$15.31245,200
2021-06-15$14.70$14.70268,800
2021-06-14$15.09$15.09235,900
2021-06-11$15.18$15.18433,700
2021-06-10$15.19$15.19338,000
2021-06-09$15.99$15.99422,400
2021-06-08$16.06$16.06672,400
2021-06-07$16.10$16.101,274,200
2021-06-04$17.54$17.545,008,700
2021-06-03$12.76$12.76678,300
2021-06-02$15.10$15.10476,900
2021-06-01$15.06$15.06214,500
2021-05-28$14.97$14.97201,900
2021-05-27$14.91$14.91253,800
2021-05-26$14.54$14.54171,200
2021-05-25$13.97$13.97190,100
2021-05-24$14.59$14.59277,400
2021-05-21$14.99$14.99228,800
2021-05-20$14.76$14.76204,600
2021-05-19$14.54$14.54165,800
2021-05-18$14.31$14.31168,300
2021-05-17$13.99$13.99171,500
2021-05-14$14.17$14.17214,700
2021-05-13$13.15$13.15333,300
2021-05-12$13.27$13.27243,300
2021-05-11$14.12$14.12536,300
2021-05-10$13.92$13.92303,900
2021-05-07$14.99$14.99534,400
2021-05-06$14.55$14.55302,800
2021-05-05$14.79$14.79295,000
2021-05-04$15.28$15.28417,600
2021-05-03$15.88$15.88265,100
2021-04-30$16.47$16.47215,800
2021-04-29$17.01$17.01145,800
2021-04-28$17.49$17.49265,800
2021-04-27$17.68$17.68365,100
2021-04-26$17.75$17.75231,600
2021-04-23$17.13$17.13201,000
2021-04-22$16.62$16.62451,500
2021-04-21$16.41$16.41387,300
2021-04-20$15.12$15.12831,000
2021-04-19$16.23$16.23467,300
2021-04-16$16.54$16.54321,300
2021-04-15$16.67$16.67406,200
2021-04-14$17.85$17.85288,800
2021-04-13$18.26$18.26305,500
2021-04-12$18.48$18.48374,200
2021-04-09$18.61$18.61361,400
2021-04-08$19.11$19.11584,300
2021-04-07$17.81$17.81343,200
2021-04-06$18.92$18.92340,500
2021-04-05$18.48$18.48322,400
2021-04-01$19.29$19.29404,200
2021-03-31$18.96$18.96812,000
2021-03-30$18.24$18.241,059,600
2021-03-29$17.16$17.16546,400
2021-03-26$18.87$18.87500,500
2021-03-25$19.40$19.40545,400
2021-03-24$19.28$19.28556,500
2021-03-23$22.30$22.30334,000
2021-03-22$23.93$23.93141,300
2021-03-19$24.08$24.08642,600
2021-03-18$22.90$22.90187,000
2021-03-17$23.95$23.95355,200
2021-03-16$24.56$24.56494,600
2021-03-15$25.70$25.70195,900
2021-03-12$25.92$25.92298,700
2021-03-11$25.27$25.27347,600
2021-03-10$24.41$24.41342,900
2021-03-09$24.15$24.15421,600
2021-03-08$21.59$21.59237,000
2021-03-05$21.81$21.81571,300
2021-03-04$20.89$20.89450,400
2021-03-03$23.08$23.08261,300
2021-03-02$25.03$25.03219,800
2021-03-01$25.89$25.89261,300
2021-02-26$23.79$23.79444,300
2021-02-25$24.09$24.09317,900
2021-02-24$25.31$25.31176,200
2021-02-23$24.45$24.45423,800
2021-02-22$24.63$24.63354,300
2021-02-19$25.98$25.98330,200
2021-02-18$24.21$24.21274,400
2021-02-17$24.88$24.88376,100
2021-02-16$25.58$25.58354,700
2021-02-12$25.80$25.80258,900
2021-02-11$25.90$25.90318,100
2021-02-10$26.04$26.04405,900
2021-02-09$28.08$28.08366,400
2021-02-08$27.42$27.42703,300
2021-02-05$24.67$24.671,334,700
2021-02-04$23.15$23.151,197,400
2021-02-03$27.22$27.22339,300
2021-02-02$26.58$26.58376,000
2021-02-01$25.53$25.53334,800
2021-01-29$24.72$24.72329,600
2021-01-28$25.77$25.77324,000
2021-01-27$26.41$26.41543,200
2021-01-26$28.50$28.50549,600
2021-01-25$28.17$28.17829,700
2021-01-22$29.35$29.35388,600
2021-01-21$28.32$28.32645,400
2021-01-20$26.28$26.28417,000
2021-01-19$25.02$25.02436,200
2021-01-15$23.76$23.76445,600
2021-01-14$24.49$24.49807,400
2021-01-13$25.89$25.89657,200
2021-01-12$28.78$28.78453,200
2021-01-11$29.14$29.14319,400
2021-01-08$29.38$29.38488,500
2021-01-07$30.06$30.061,166,000
2021-01-06$26.93$26.93729,900
2021-01-05$24.69$24.69410,300
2021-01-04$23.36$23.36289,600