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 — 2014

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2014-12-31$7.40$7.40167,810
2014-12-30$7.50$7.50207,170
2014-12-29$7.60$7.60130,670
2014-12-26$8.00$8.0071,920
2014-12-24$8.20$8.2081,210
2014-12-23$8.10$8.10194,070
2014-12-22$7.70$7.70148,860
2014-12-19$7.30$7.30120,010
2014-12-18$7.20$7.2080,620
2014-12-17$7.30$7.30105,470
2014-12-16$7.40$7.4089,470
2014-12-15$7.20$7.20102,010
2014-12-12$7.70$7.7026,130
2014-12-11$7.90$7.9050,690
2014-12-10$7.90$7.9029,240
2014-12-09$8.30$8.3030,010
2014-12-08$8.20$8.2088,470
2014-12-05$8.70$8.7052,320
2014-12-04$9.40$9.4044,060
2014-12-03$9.40$9.4027,180
2014-12-02$9.00$9.0020,900
2014-12-01$9.30$9.3069,770
2014-11-28$9.90$9.9030,850
2014-11-26$10.20$10.2021,630
2014-11-25$10.50$10.5021,660
2014-11-24$10.40$10.4037,380
2014-11-21$10.00$10.0038,350
2014-11-20$10.40$10.4028,140
2014-11-19$10.60$10.6043,510
2014-11-18$10.50$10.5065,760
2014-11-17$9.90$9.9062,270
2014-11-14$10.30$10.3077,560
2014-11-13$9.60$9.60212,100
2014-11-12$10.80$10.8098,950
2014-11-11$11.40$11.4071,250
2014-11-10$11.80$11.8058,550
2014-11-07$11.70$11.70180,870
2014-11-06$13.60$13.6074,260
2014-11-05$13.20$13.2036,100
2014-11-04$12.80$12.8036,060
2014-11-03$12.50$12.5033,630
2014-10-31$13.10$13.1061,620
2014-10-30$12.00$12.0018,410
2014-10-29$11.90$11.9044,040
2014-10-28$11.90$11.9059,090
2014-10-27$11.80$11.8027,140
2014-10-24$11.90$11.9041,050
2014-10-23$12.00$12.0036,540
2014-10-22$12.10$12.1031,970
2014-10-21$12.20$12.2045,820
2014-10-20$12.10$12.1028,190
2014-10-17$12.20$12.2040,290
2014-10-16$12.20$12.2038,360
2014-10-15$12.10$12.1051,950
2014-10-14$12.30$12.3066,620
2014-10-13$12.20$12.2040,490
2014-10-10$12.60$12.6038,940
2014-10-09$12.70$12.7050,460
2014-10-08$13.20$13.2022,890
2014-10-07$13.60$13.6020,340
2014-10-06$13.50$13.5021,070
2014-10-03$13.50$13.5019,710
2014-10-02$13.80$13.8032,910
2014-10-01$13.50$13.5041,840
2014-09-30$14.10$14.1020,610
2014-09-29$14.20$14.2016,910
2014-09-26$14.40$14.4016,830
2014-09-25$14.00$14.0022,350
2014-09-24$14.40$14.4018,130
2014-09-23$14.20$14.2044,020
2014-09-22$14.70$14.7018,760
2014-09-19$15.40$15.4074,320
2014-09-18$14.80$14.8013,330
2014-09-17$14.80$14.8019,680
2014-09-16$14.90$14.9046,300
2014-09-15$15.00$15.0045,050
2014-09-12$16.10$16.1027,030
2014-09-11$15.70$15.7077,420
2014-09-10$15.10$15.1039,390
2014-09-09$15.20$15.2033,590
2014-09-08$15.60$15.6065,030
2014-09-05$16.30$16.3028,190
2014-09-04$16.40$16.40219,660
2014-09-03$17.40$17.4056,550
2014-09-02$17.90$17.9033,750
2014-08-29$17.80$17.8027,010
2014-08-28$17.60$17.6029,120
2014-08-27$17.90$17.9053,830
2014-08-26$18.20$18.2027,530
2014-08-25$18.20$18.2051,810
2014-08-22$18.10$18.1073,120
2014-08-21$18.50$18.50139,610
2014-08-20$18.70$18.7033,590
2014-08-19$18.40$18.4079,820
2014-08-18$17.50$17.5036,050
2014-08-15$17.40$17.4038,210
2014-08-14$17.30$17.3036,690
2014-08-13$17.10$17.1059,940
2014-08-12$17.70$17.7025,700
2014-08-11$17.40$17.4027,410
2014-08-08$17.60$17.6059,940
2014-08-07$18.00$18.0066,960
2014-08-06$17.10$17.1064,890
2014-08-05$17.30$17.30236,240
2014-08-04$20.00$20.0071,420
2014-08-01$19.30$19.3095,790
2014-07-31$19.90$19.9079,340
2014-07-30$20.30$20.30102,730
2014-07-29$21.00$21.00270,950
2014-07-28$18.70$18.7050,650
2014-07-25$18.90$18.9057,140
2014-07-24$19.00$19.0064,460
2014-07-23$19.00$19.0086,370
2014-07-22$19.60$19.60117,060
2014-07-21$18.60$18.60150,410
2014-07-18$18.70$18.70132,780
2014-07-17$19.20$19.20342,300
2014-07-16$20.60$20.601,145,140
2014-07-15$16.10$16.1056,000
2014-07-14$17.20$17.2073,720
2014-07-11$16.30$16.30112,690
2014-07-10$15.80$15.8036,980
2014-07-09$15.70$15.7049,930
2014-07-08$15.70$15.7072,770
2014-07-07$15.70$15.7067,160
2014-07-03$16.20$16.2053,930
2014-07-02$16.90$16.9088,320
2014-07-01$17.20$17.20207,350
2014-06-30$16.30$16.30201,880
2014-06-27$15.30$15.30776,120
2014-06-26$14.60$14.6043,470
2014-06-25$14.40$14.4048,900
2014-06-24$14.50$14.5071,880
2014-06-23$15.30$15.3052,230
2014-06-20$15.50$15.5064,000
2014-06-19$16.00$16.0040,700
2014-06-18$15.70$15.7036,000
2014-06-17$15.70$15.7086,930
2014-06-16$16.10$16.10228,660
2014-06-13$15.00$15.00100,440
2014-06-12$14.00$14.0058,030
2014-06-11$13.90$13.9035,150
2014-06-10$13.60$13.6023,900
2014-06-09$13.60$13.6034,390
2014-06-06$13.90$13.9044,230
2014-06-05$13.80$13.80114,970
2014-06-04$13.60$13.6055,180
2014-06-03$13.10$13.1046,690
2014-06-02$13.60$13.6064,700
2014-05-30$14.00$14.0035,220
2014-05-29$14.30$14.3040,330
2014-05-28$14.70$14.7058,380
2014-05-27$14.10$14.1029,550
2014-05-23$14.50$14.5029,630
2014-05-22$14.30$14.3029,050
2014-05-21$14.70$14.7038,290
2014-05-20$15.00$15.00110,650
2014-05-19$15.00$15.0095,100
2014-05-16$14.00$14.0068,520
2014-05-15$12.90$12.9031,890
2014-05-14$13.10$13.1032,180
2014-05-13$13.50$13.5048,600
2014-05-12$14.10$14.1082,090
2014-05-09$12.80$12.8029,860
2014-05-08$12.60$12.6057,800
2014-05-07$12.80$12.8078,040
2014-05-06$12.80$12.8073,070
2014-05-05$13.10$13.1032,080
2014-05-02$13.10$13.1065,370
2014-05-01$13.60$13.6064,740
2014-04-30$12.80$12.8065,750
2014-04-29$13.10$13.1045,380
2014-04-28$13.10$13.10126,480
2014-04-25$13.90$13.9044,020
2014-04-24$14.20$14.2033,240
2014-04-23$14.30$14.3032,470
2014-04-22$14.80$14.8054,670
2014-04-21$14.30$14.3037,450
2014-04-17$14.20$14.2043,190
2014-04-16$14.50$14.5049,830
2014-04-15$14.30$14.30114,230
2014-04-14$14.30$14.3077,100
2014-04-11$14.20$14.2076,820
2014-04-10$14.50$14.50127,790
2014-04-09$15.70$15.70132,450
2014-04-08$14.60$14.6074,930
2014-04-07$14.50$14.50133,670
2014-04-04$15.10$15.10131,810
2014-04-03$15.30$15.30103,740
2014-04-02$16.00$16.00160,790
2014-04-01$16.30$16.30245,540
2014-03-31$16.10$16.10100,510
2014-03-28$16.30$16.30113,560
2014-03-27$16.60$16.6082,020
2014-03-26$16.60$16.60205,020
2014-03-25$18.40$18.4084,520
2014-03-24$18.30$18.30148,630
2014-03-21$20.20$20.2089,150
2014-03-20$19.60$19.60169,730
2014-03-19$20.70$20.70190,210
2014-03-18$21.20$21.2081,990
2014-03-17$21.60$21.6096,670
2014-03-14$20.90$20.90116,680
2014-03-13$21.30$21.30189,270
2014-03-12$22.30$22.30138,440
2014-03-11$23.10$23.10634,910
2014-03-10$21.80$21.80143,170
2014-03-07$22.40$22.40148,090
2014-03-06$21.10$21.10215,490
2014-03-05$22.20$22.20412,240
2014-03-04$19.60$19.60186,030
2014-03-03$18.30$18.3067,190
2014-02-28$18.50$18.50123,340
2014-02-27$18.60$18.60131,800
2014-02-26$18.10$18.1081,080
2014-02-25$18.30$18.30111,880
2014-02-24$19.30$19.3070,810
2014-02-21$19.20$19.2078,730
2014-02-20$19.40$19.40181,150
2014-02-19$20.70$20.70673,370
2014-02-18$18.10$18.10275,040
2014-02-14$16.80$16.8055,350
2014-02-13$16.60$16.6089,770
2014-02-12$16.30$16.30163,430
2014-02-11$16.30$16.30217,350
2014-02-10$15.60$15.60108,500
2014-02-07$15.40$15.4058,630
2014-02-06$14.80$14.8098,270
2014-02-05$14.30$14.3038,650
2014-02-04$14.30$14.3046,130
2014-02-03$14.50$14.5053,620
2014-01-31$15.00$15.0030,660
2014-01-30$15.50$15.5052,490
2014-01-29$14.70$14.7049,750
2014-01-28$15.10$15.1043,660
2014-01-27$15.30$15.3061,120
2014-01-24$15.60$15.6093,710
2014-01-23$16.60$16.6037,710
2014-01-22$17.00$17.0036,200
2014-01-21$17.30$17.3049,380
2014-01-17$17.30$17.3053,680
2014-01-16$17.60$17.6055,740
2014-01-15$17.90$17.90152,850
2014-01-14$16.50$16.5049,090
2014-01-13$15.90$15.90118,590
2014-01-10$17.20$17.2052,340
2014-01-09$16.90$16.9050,850
2014-01-08$16.70$16.7059,890
2014-01-07$16.80$16.80116,610
2014-01-06$16.40$16.4052,530
2014-01-03$16.40$16.40101,590
2014-01-02$17.40$17.40143,810