NASDAQ:AMSC | Stock Price History | 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.

Historical Stock Price

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2026-09-04$29.3518,497
2026-09-03$28.6324,991
2026-09-02$28.8224,466
2026-09-01$28.2224,332
2026-08-31$28.3726,711
2026-08-28$29.7622,923
2026-08-27$29.84$29.84541,400$30.4824,653
2026-08-26$29.49$29.49586,400$29.7922,555
2026-08-25$29.65$29.65441,200$29.8522,081
2026-08-24$28.92$28.921,119,500$29.1534,595
2026-08-21$30.01$30.01738,500$30.6624,338
2026-08-20$30.05$30.05517,100$30.9416,658
2026-08-19$31.16$31.16535,400$30.9313,275
2026-08-18$31.02$31.02619,300$31.1619,997
2026-08-17$32.13$32.13550,300$32.2014,235
2026-08-14$31.92$31.92535,000$32.0617,508
2026-08-13$31.51$31.51521,100$32.2127,079
2026-08-12$32.28$32.28533,200$33.5429,574
2026-08-11$32.13$32.13526,400$31.8315,024
2026-08-10$30.99$30.99571,800$32.7717,264
2026-08-07$32.77$32.77870,100$33.8350,319
2026-08-06$32.90$32.901,139,100$29.6139,102
2026-08-05$32.94$32.941,056,300$33.2250,449
2026-08-04$33.45$33.45859,700$31.7132,212
2026-08-03$30.99$30.99665,800$29.1820,487
2026-07-31$29.37$29.37661,300$30.8719,876
2026-07-30$29.45$29.45766,400$28.2522,254
2026-07-29$26.64$26.641,136,600$28.5025,650
2026-07-28$28.75$28.751,080,900$29.4157,941
2026-07-27$30.53$30.531,379,100$30.8844,753
2026-07-24$30.52$30.521,120,900$32.7860,557
2026-07-23$33.00$33.00884,800$32.6959,094
2026-07-22$33.40$33.40765,900$34.0925,739
2026-07-21$34.55$34.55704,700$33.6132,751
2026-07-20$32.51$32.51420,900$33.9413,903
2026-07-17$33.03$33.03609,100
2026-07-16$33.09$33.09577,100
2026-07-15$35.30$35.30527,500
2026-07-14$35.46$35.46419,500
2026-07-13$34.18$34.18558,300
2026-07-10$35.96$35.96563,100
2026-07-09$37.17$37.17717,200
2026-07-08$36.00$36.00831,100
2026-07-07$35.55$35.55735,900
2026-07-06$38.13$38.13845,900
2026-07-02$37.11$37.11878,900
2026-07-01$39.92$39.92710,300
2026-06-30$41.51$41.51710,100
2026-06-29$39.83$39.83841,600
2026-06-26$39.73$39.732,160,400
2026-06-25$40.28$40.28961,300
2026-06-24$40.85$40.85848,000
2026-06-23$41.63$41.63767,200
2026-06-22$45.33$45.331,035,100
2026-06-18$43.40$43.401,125,000
2026-06-17$40.13$40.13799,900
2026-06-16$40.46$40.461,115,500
2026-06-15$41.07$41.07924,200
2026-06-12$40.02$40.02806,200
2026-06-11$39.51$39.511,842,900
2026-06-10$36.78$36.782,420,000
2026-06-09$40.53$40.531,558,700
2026-06-08$43.34$43.341,583,300
2026-06-05$42.34$42.341,820,800
2026-06-04$46.40$46.401,263,800
2026-06-03$46.67$46.671,478,500
2026-06-02$51.17$51.171,281,700
2026-06-01$51.15$51.151,134,000
2026-05-29$50.94$50.941,335,600
2026-05-28$51.33$51.333,434,100
2026-05-27$52.68$52.681,942,200
2026-05-26$53.12$53.121,169,500
2026-05-22$51.84$51.84745,100
2026-05-21$49.42$49.42659,800
2026-05-20$49.22$49.22933,300
2026-05-19$47.09$47.091,168,400
2026-05-18$50.15$50.151,264,200
2026-05-15$55.06$55.061,059,800
2026-05-14$54.70$54.701,210,700
2026-05-13$55.73$55.73977,300
2026-05-12$54.51$54.511,314,800
2026-05-11$58.72$58.721,749,700
2026-05-08$55.19$55.19859,800
2026-05-07$53.22$53.221,201,600
2026-05-06$57.07$57.071,080,300
2026-05-05$55.01$55.011,400,600
2026-05-04$50.30$50.301,068,800
2026-05-01$52.51$52.511,310,400
2026-04-30$53.54$53.541,863,800
2026-04-29$47.70$47.701,293,200
2026-04-28$47.50$47.501,769,600
2026-04-27$49.64$49.642,525,400
2026-04-24$49.48$49.482,319,300
2026-04-23$46.15$46.152,644,600
2026-04-22$48.15$48.152,463,700
2026-04-21$41.93$41.931,587,000
2026-04-20$40.73$40.73692,300
2026-04-17$39.72$39.721,058,400
2026-04-16$37.97$37.97917,300
2026-04-15$37.74$37.741,294,000