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 — 1998

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1998-12-31$102.50$102.505,590
1998-12-30$99.38$99.384,270
1998-12-29$102.50$102.502,500
1998-12-28$101.25$101.255,830
1998-12-24$106.88$106.8813,550
1998-12-23$106.25$106.256,610
1998-12-22$102.50$102.5014,770
1998-12-21$99.38$99.3815,230
1998-12-18$110.00$110.004,440
1998-12-17$106.88$106.884,370
1998-12-16$106.88$106.884,200
1998-12-15$107.50$107.504,170
1998-12-14$112.50$112.507,870
1998-12-11$108.75$108.754,610
1998-12-10$106.25$106.252,970
1998-12-09$107.50$107.508,760
1998-12-08$110.00$110.003,130
1998-12-07$118.75$118.754,260
1998-12-04$118.75$118.753,920
1998-12-03$105.00$105.0010,910
1998-12-02$102.50$102.502,640
1998-12-01$101.25$101.2512,880
1998-11-30$100.00$100.005,420
1998-11-27$100.00$100.001,340
1998-11-25$98.75$98.751,680
1998-11-24$103.13$103.133,310
1998-11-23$102.50$102.504,620
1998-11-20$105.63$105.632,080
1998-11-19$108.13$108.131,220
1998-11-18$107.50$107.503,140
1998-11-17$102.50$102.502,600
1998-11-16$103.75$103.752,210
1998-11-13$105.63$105.631,120
1998-11-12$105.63$105.631,250
1998-11-11$102.50$102.501,920
1998-11-10$103.75$103.752,710
1998-11-09$102.50$102.501,970
1998-11-06$106.25$106.252,290
1998-11-05$103.75$103.757,070
1998-11-04$110.00$110.0021,960
1998-11-03$110.00$110.0015,420
1998-11-02$103.75$103.758,650
1998-10-30$98.75$98.757,680
1998-10-29$101.88$101.889,820
1998-10-28$91.25$91.252,390
1998-10-27$91.88$91.888,630
1998-10-26$90.00$90.004,770
1998-10-23$90.00$90.0015,500
1998-10-22$91.25$91.255,130
1998-10-21$90.00$90.005,910
1998-10-20$95.00$95.0017,460
1998-10-19$105.00$105.0018,280
1998-10-16$76.25$76.255,750
1998-10-15$75.00$75.009,940
1998-10-14$62.50$62.509,150
1998-10-13$68.75$68.752,740
1998-10-12$69.38$69.383,410
1998-10-09$67.50$67.504,570
1998-10-08$64.38$64.385,920
1998-10-07$67.50$67.507,760
1998-10-06$73.13$73.137,790
1998-10-05$71.25$71.253,690
1998-10-02$71.25$71.253,760
1998-10-01$68.75$68.757,120
1998-09-30$70.00$70.008,820
1998-09-29$68.75$68.754,580
1998-09-28$70.00$70.007,510
1998-09-25$70.63$70.632,640
1998-09-24$70.00$70.002,390
1998-09-23$70.00$70.008,180
1998-09-22$70.00$70.008,470
1998-09-21$66.88$66.881,200
1998-09-18$67.50$67.504,890
1998-09-17$65.00$65.002,920
1998-09-16$68.75$68.752,810
1998-09-15$70.00$70.001,300
1998-09-14$70.00$70.003,630
1998-09-11$68.75$68.754,340
1998-09-10$67.50$67.506,090
1998-09-09$73.75$73.758,830
1998-09-08$66.25$66.2510,440
1998-09-04$70.00$70.0012,040
1998-09-03$70.00$70.007,710
1998-09-02$73.75$73.7519,080
1998-09-01$73.13$73.1387,160
1998-08-31$85.00$85.007,500
1998-08-28$88.75$88.757,000
1998-08-27$86.25$86.259,300
1998-08-26$92.50$92.504,210
1998-08-25$98.75$98.7513,480
1998-08-24$93.75$93.757,350
1998-08-21$101.25$101.252,120
1998-08-20$100.00$100.002,900
1998-08-19$100.00$100.001,930
1998-08-18$99.38$99.383,000
1998-08-17$100.00$100.001,210
1998-08-14$100.00$100.005,360
1998-08-13$100.00$100.001,280
1998-08-12$100.00$100.002,690
1998-08-11$102.50$102.502,330
1998-08-10$105.00$105.004,760
1998-08-07$105.00$105.005,240
1998-08-06$98.75$98.757,550
1998-08-05$88.75$88.7516,100
1998-08-04$98.13$98.132,210
1998-08-03$95.00$95.001,700
1998-07-31$100.63$100.634,770
1998-07-30$103.13$103.136,290
1998-07-29$105.00$105.0016,560
1998-07-28$115.00$115.004,210
1998-07-27$116.25$116.253,610
1998-07-24$120.00$120.0020,190
1998-07-23$115.63$115.633,180
1998-07-22$120.00$120.006,010
1998-07-21$125.00$125.008,680
1998-07-20$130.00$130.009,340
1998-07-17$136.25$136.2525,760
1998-07-16$131.25$131.2510,670
1998-07-15$130.00$130.0013,890
1998-07-14$128.75$128.7530,160
1998-07-13$118.75$118.752,160
1998-07-10$119.38$119.381,690
1998-07-09$120.00$120.006,740
1998-07-08$118.75$118.755,540
1998-07-07$120.00$120.002,980
1998-07-06$120.63$120.633,820
1998-07-02$118.75$118.755,730
1998-07-01$119.38$119.382,120
1998-06-30$120.00$120.002,870
1998-06-29$118.75$118.751,160
1998-06-26$120.00$120.004,070
1998-06-25$118.75$118.753,820
1998-06-24$118.75$118.754,230
1998-06-23$118.75$118.752,500
1998-06-22$117.50$117.50660
1998-06-19$117.50$117.505,200
1998-06-18$120.00$120.002,180
1998-06-17$120.00$120.003,030
1998-06-16$116.25$116.252,030
1998-06-15$117.50$117.502,890
1998-06-12$117.50$117.505,390
1998-06-11$117.50$117.501,410
1998-06-10$118.75$118.756,830
1998-06-09$121.25$121.252,110
1998-06-08$118.75$118.757,320
1998-06-05$120.00$120.006,990
1998-06-04$127.50$127.502,870
1998-06-03$126.25$126.251,690
1998-06-02$127.50$127.502,760
1998-06-01$123.75$123.751,860
1998-05-29$125.63$125.636,120
1998-05-28$131.25$131.259,070
1998-05-27$130.63$130.636,990
1998-05-26$130.00$130.0016,130
1998-05-22$132.50$132.5043,380
1998-05-21$122.50$122.506,670
1998-05-20$122.50$122.508,250
1998-05-19$120.00$120.004,170
1998-05-18$118.75$118.7511,040
1998-05-15$118.75$118.7512,910
1998-05-14$125.63$125.633,860
1998-05-13$125.63$125.6312,640
1998-05-12$123.75$123.757,210
1998-05-11$127.50$127.5015,920
1998-05-08$126.25$126.2530,020
1998-05-07$123.75$123.7511,280
1998-05-06$130.00$130.007,700
1998-05-05$133.75$133.7511,070
1998-05-04$132.50$132.504,590
1998-05-01$135.00$135.006,460
1998-04-30$134.38$134.3811,030
1998-04-29$131.25$131.2516,680
1998-04-28$125.63$125.6332,470
1998-04-27$123.13$123.1325,290
1998-04-24$127.50$127.5012,830
1998-04-23$128.75$128.7518,350
1998-04-22$131.25$131.2524,150
1998-04-21$138.75$138.7520,450
1998-04-20$142.50$142.5039,690
1998-04-17$143.75$143.75188,760
1998-04-16$145.00$145.005,540
1998-04-15$148.75$148.7516,430
1998-04-14$153.75$153.755,570
1998-04-13$161.25$161.253,850
1998-04-09$161.25$161.258,880
1998-04-08$168.13$168.133,240
1998-04-07$168.75$168.758,590
1998-04-06$168.75$168.7513,450
1998-04-03$180.00$180.0046,950
1998-04-02$165.00$165.0038,290
1998-04-01$148.75$148.7517,990
1998-03-31$138.75$138.75920
1998-03-30$136.25$136.256,020
1998-03-27$137.50$137.5014,130
1998-03-26$140.00$140.002,270
1998-03-25$140.63$140.635,850
1998-03-24$144.38$144.384,130
1998-03-23$141.88$141.881,030
1998-03-20$144.38$144.382,510
1998-03-19$145.00$145.00930
1998-03-18$146.88$146.881,940
1998-03-17$146.25$146.255,830
1998-03-16$146.25$146.255,110
1998-03-13$145.00$145.00650
1998-03-12$142.50$142.502,640
1998-03-11$140.00$140.003,390
1998-03-10$140.00$140.002,850
1998-03-09$143.75$143.752,730
1998-03-06$145.00$145.004,330
1998-03-05$141.25$141.252,180
1998-03-04$139.38$139.383,410
1998-03-03$140.63$140.637,710
1998-03-02$150.00$150.008,880
1998-02-27$145.00$145.0013,720
1998-02-26$140.00$140.0016,560
1998-02-25$128.75$128.757,590
1998-02-24$118.75$118.755,580
1998-02-23$121.25$121.252,230
1998-02-20$120.63$120.634,750
1998-02-19$118.75$118.755,470
1998-02-18$112.50$112.5025,770
1998-02-17$112.50$112.502,880
1998-02-13$112.50$112.504,360
1998-02-12$111.88$111.884,430
1998-02-11$112.50$112.509,120
1998-02-10$115.00$115.0013,140
1998-02-09$121.25$121.254,460
1998-02-06$122.50$122.506,630
1998-02-05$123.75$123.756,910
1998-02-04$123.75$123.7516,290
1998-02-03$117.50$117.5030,200
1998-02-02$100.00$100.0032,750
1998-01-30$91.25$91.252,860
1998-01-29$93.13$93.131,180
1998-01-28$91.25$91.252,850
1998-01-27$92.50$92.50440
1998-01-26$91.25$91.253,320
1998-01-23$93.13$93.133,590
1998-01-22$97.50$97.501,860
1998-01-21$96.25$96.25800
1998-01-20$98.75$98.757,930
1998-01-16$100.00$100.0014,370
1998-01-15$98.13$98.1318,760
1998-01-14$95.00$95.002,470
1998-01-13$92.50$92.507,760
1998-01-12$93.13$93.136,900
1998-01-09$93.13$93.1312,550
1998-01-08$92.50$92.5033,320
1998-01-07$86.25$86.252,140
1998-01-06$85.00$85.003,650
1998-01-05$85.63$85.632,720
1998-01-02$85.00$85.002,850