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 — 2025

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2025-12-31$28.78$28.78832,800
2025-12-30$28.95$28.951,096,800
2025-12-29$29.24$29.24828,800
2025-12-26$30.58$30.58525,900
2025-12-24$31.34$31.34305,500
2025-12-23$31.77$31.77546,100
2025-12-22$31.86$31.86892,800
2025-12-19$30.65$30.65920,700
2025-12-18$30.59$30.59790,000
2025-12-17$29.04$29.041,216,900
2025-12-16$31.21$31.21643,100
2025-12-15$31.51$31.511,001,900
2025-12-12$31.07$31.07854,700
2025-12-11$32.24$32.24928,400
2025-12-10$33.37$33.37891,000
2025-12-09$32.51$32.51559,500
2025-12-08$32.46$32.46528,800
2025-12-05$32.47$32.47743,300
2025-12-04$33.01$33.01737,400
2025-12-03$32.04$32.04631,200
2025-12-02$30.79$30.79812,500
2025-12-01$29.95$29.95916,100
2025-11-28$31.09$31.09585,000
2025-11-26$30.50$30.501,132,400
2025-11-25$30.75$30.75999,800
2025-11-24$31.27$31.27879,600
2025-11-21$30.38$30.381,198,000
2025-11-20$29.78$29.781,124,200
2025-11-19$31.18$31.18662,900
2025-11-18$31.17$31.171,056,000
2025-11-17$32.13$32.13971,900
2025-11-14$33.91$33.91875,300
2025-11-13$33.63$33.631,379,000
2025-11-12$35.18$35.18859,300
2025-11-11$35.32$35.321,494,800
2025-11-10$36.91$36.912,093,200
2025-11-07$38.86$38.863,040,100
2025-11-06$36.55$36.555,403,900
2025-11-05$59.42$59.421,095,200
2025-11-04$56.29$56.29676,700
2025-11-03$60.63$60.63631,700
2025-10-31$59.23$59.23701,700
2025-10-30$58.92$58.92957,200
2025-10-29$63.01$63.011,369,600
2025-10-28$57.86$57.86685,000
2025-10-27$57.85$57.85943,200
2025-10-24$59.58$59.581,093,500
2025-10-23$56.53$56.53870,400
2025-10-22$54.78$54.781,737,800
2025-10-21$59.26$59.26651,700
2025-10-20$61.03$61.03863,700
2025-10-17$60.02$60.021,010,000
2025-10-16$63.05$63.05822,800
2025-10-15$66.68$66.681,519,100
2025-10-14$65.54$65.541,910,300
2025-10-13$61.57$61.571,115,700
2025-10-10$56.24$56.241,255,900
2025-10-09$59.80$59.80831,000
2025-10-08$60.70$60.701,112,200
2025-10-07$56.55$56.551,818,000
2025-10-06$60.98$60.981,069,100
2025-10-03$59.30$59.301,557,500
2025-10-02$59.25$59.25809,200
2025-10-01$59.17$59.17661,300
2025-09-30$59.39$59.391,059,700
2025-09-29$60.84$60.841,259,300
2025-09-26$58.57$58.57710,200
2025-09-25$57.96$57.961,046,000
2025-09-24$59.61$59.611,230,200
2025-09-23$61.34$61.341,226,600
2025-09-22$64.63$64.631,487,800
2025-09-19$61.55$61.552,874,200
2025-09-18$64.49$64.492,386,800
2025-09-17$60.49$60.492,111,400
2025-09-16$56.51$56.51645,200
2025-09-15$56.59$56.59795,700
2025-09-12$56.32$56.321,329,400
2025-09-11$54.72$54.721,134,500
2025-09-10$51.45$51.451,083,700
2025-09-09$49.85$49.85685,200
2025-09-08$50.08$50.081,054,800
2025-09-05$48.88$48.88633,500
2025-09-04$48.53$48.531,077,600
2025-09-03$48.63$48.63710,700
2025-09-02$48.76$48.76807,000
2025-08-29$49.90$49.901,108,900
2025-08-28$53.84$53.84743,900
2025-08-27$52.11$52.11842,400
2025-08-26$52.26$52.26964,600
2025-08-25$49.58$49.58503,800
2025-08-22$50.68$50.68760,000
2025-08-21$48.59$48.59935,400
2025-08-20$48.11$48.111,222,600
2025-08-19$48.82$48.821,418,600
2025-08-18$53.46$53.46737,400
2025-08-15$53.06$53.06907,400
2025-08-14$52.16$52.16954,500
2025-08-13$54.09$54.091,271,100
2025-08-12$55.89$55.891,113,300
2025-08-11$52.15$52.151,028,300
2025-08-08$50.99$50.991,245,400
2025-08-07$54.30$54.301,063,300
2025-08-06$54.87$54.87794,900
2025-08-05$55.62$55.621,268,800
2025-08-04$55.52$55.521,662,200
2025-08-01$53.75$53.752,403,500
2025-07-31$56.85$56.855,321,400
2025-07-30$43.94$43.941,223,500
2025-07-29$43.48$43.48796,700
2025-07-28$43.76$43.76777,800
2025-07-25$43.20$43.201,003,000
2025-07-24$43.01$43.01612,400
2025-07-23$42.96$42.96885,300
2025-07-22$41.23$41.231,127,000
2025-07-21$42.30$42.30856,200
2025-07-18$42.72$42.721,279,400
2025-07-17$41.38$41.38809,200
2025-07-16$41.07$41.07872,800
2025-07-15$40.96$40.96986,800
2025-07-14$40.71$40.711,049,300
2025-07-11$39.17$39.17716,000
2025-07-10$39.72$39.72886,900
2025-07-09$39.91$39.91857,200
2025-07-08$38.93$38.93999,800
2025-07-07$40.26$40.26942,200
2025-07-03$39.90$39.90885,600
2025-07-02$39.19$39.191,804,900
2025-07-01$35.98$35.981,006,700
2025-06-30$36.69$36.691,340,100
2025-06-27$36.44$36.441,778,500
2025-06-26$36.68$36.681,442,200
2025-06-25$34.05$34.05916,700
2025-06-24$33.53$33.531,109,900
2025-06-23$32.42$32.421,465,400
2025-06-20$30.40$30.401,136,300
2025-06-18$30.83$30.831,114,200
2025-06-17$29.88$29.881,055,300
2025-06-16$29.62$29.62996,000
2025-06-13$29.35$29.351,834,200
2025-06-12$29.23$29.231,796,800
2025-06-11$29.67$29.676,552,700
2025-06-10$34.45$34.451,371,300
2025-06-09$33.09$33.09996,500
2025-06-06$31.48$31.481,246,000
2025-06-05$31.86$31.861,403,300
2025-06-04$30.71$30.711,144,800
2025-06-03$30.06$30.061,005,600
2025-06-02$28.82$28.821,050,700
2025-05-30$28.26$28.26975,700
2025-05-29$28.04$28.04740,600
2025-05-28$27.89$27.891,116,400
2025-05-27$27.38$27.381,448,500
2025-05-23$25.28$25.28822,200
2025-05-22$25.19$25.192,250,600
2025-05-21$24.19$24.191,396,300
2025-05-20$24.68$24.68665,900
2025-05-19$24.76$24.76743,400
2025-05-16$24.02$24.02399,100
2025-05-15$23.52$23.52322,900
2025-05-14$23.74$23.74539,300
2025-05-13$23.58$23.58697,700
2025-05-12$22.80$22.80680,800
2025-05-09$21.60$21.60391,500
2025-05-08$21.39$21.39403,000
2025-05-07$20.72$20.72316,000
2025-05-06$20.85$20.85378,400
2025-05-05$20.58$20.58375,600
2025-05-02$21.10$21.10505,900
2025-05-01$20.29$20.29441,600
2025-04-30$19.85$19.85459,400
2025-04-29$20.22$20.22267,200
2025-04-28$20.11$20.11271,800
2025-04-25$20.29$20.29458,000
2025-04-24$20.13$20.13674,300
2025-04-23$18.57$18.57566,700
2025-04-22$18.42$18.42389,700
2025-04-21$17.52$17.52466,700
2025-04-17$18.41$18.41333,300
2025-04-16$18.18$18.18357,800
2025-04-15$18.25$18.25350,500
2025-04-14$18.18$18.18420,700
2025-04-11$18.00$18.00484,100
2025-04-10$17.46$17.46632,700
2025-04-09$18.81$18.811,090,300
2025-04-08$16.00$16.00722,900
2025-04-07$16.61$16.61908,800
2025-04-04$15.80$15.801,059,700
2025-04-03$16.67$16.67818,300
2025-04-02$18.94$18.94368,900
2025-04-01$18.40$18.40488,800
2025-03-31$18.14$18.14689,200
2025-03-28$18.78$18.78465,400
2025-03-27$19.40$19.40533,000
2025-03-26$20.38$20.38601,900
2025-03-25$21.48$21.48487,500
2025-03-24$21.59$21.59837,200
2025-03-21$19.84$19.84876,300
2025-03-20$20.07$20.07805,400
2025-03-19$20.05$20.05540,500
2025-03-18$19.04$19.04504,300
2025-03-17$19.91$19.91694,400
2025-03-14$20.00$20.00711,300
2025-03-13$18.64$18.64705,600
2025-03-12$19.21$19.21774,900
2025-03-11$18.57$18.57953,800
2025-03-10$17.54$17.541,269,700
2025-03-07$19.25$19.251,440,200
2025-03-06$19.17$19.17900,900
2025-03-05$19.99$19.99732,000
2025-03-04$19.39$19.391,324,100
2025-03-03$20.01$20.011,293,300
2025-02-28$22.71$22.71841,100
2025-02-27$22.12$22.121,027,100
2025-02-26$23.74$23.741,383,400
2025-02-25$22.38$22.382,065,200
2025-02-24$23.96$23.961,264,300
2025-02-21$25.70$25.701,490,700
2025-02-20$28.83$28.831,106,300
2025-02-19$31.45$31.45633,600
2025-02-18$32.41$32.41914,600
2025-02-14$31.16$31.16923,900
2025-02-13$31.69$31.69806,500
2025-02-12$30.35$30.35807,400
2025-02-11$31.72$31.721,475,100
2025-02-10$32.59$32.591,390,900
2025-02-07$32.85$32.853,062,000
2025-02-06$34.24$34.246,587,300
2025-02-05$25.52$25.521,479,000
2025-02-04$25.32$25.321,073,400
2025-02-03$26.32$26.32704,000
2025-01-31$26.27$26.271,165,500
2025-01-30$27.31$27.31715,600
2025-01-29$26.10$26.10575,800
2025-01-28$26.19$26.19904,400
2025-01-27$26.03$26.031,617,500
2025-01-24$29.04$29.04624,100
2025-01-23$29.72$29.72623,700
2025-01-22$28.87$28.87999,400
2025-01-21$28.74$28.741,362,600
2025-01-17$27.81$27.81685,800
2025-01-16$27.81$27.81496,700
2025-01-15$28.05$28.05681,600
2025-01-14$26.39$26.391,237,600
2025-01-13$26.08$26.08809,100
2025-01-10$27.08$27.08685,500
2025-01-08$27.17$27.17817,800
2025-01-07$28.55$28.551,003,300
2025-01-06$29.14$29.141,162,700
2025-01-03$28.68$28.681,483,000
2025-01-02$25.55$25.55983,700