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 — 2011

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2011-12-30$36.90$36.9085,250
2011-12-29$37.60$37.6086,810
2011-12-28$37.20$37.2053,940
2011-12-27$39.30$39.3060,660
2011-12-23$40.40$40.4059,390
2011-12-22$41.20$41.2078,600
2011-12-21$39.70$39.70107,970
2011-12-20$40.50$40.50108,060
2011-12-19$35.00$35.0061,750
2011-12-16$36.90$36.9087,760
2011-12-15$37.50$37.5046,650
2011-12-14$37.60$37.6063,560
2011-12-13$39.00$39.0052,470
2011-12-12$40.30$40.3058,140
2011-12-09$40.70$40.7042,630
2011-12-08$39.50$39.5073,680
2011-12-07$41.20$41.2049,280
2011-12-06$40.90$40.9063,850
2011-12-05$41.60$41.6049,600
2011-12-02$41.10$41.1063,440
2011-12-01$41.50$41.5077,910
2011-11-30$39.70$39.7089,040
2011-11-29$38.40$38.4048,270
2011-11-28$40.00$40.0095,330
2011-11-25$38.40$38.4037,700
2011-11-23$40.30$40.3079,670
2011-11-22$40.20$40.2079,550
2011-11-21$40.30$40.30142,960
2011-11-18$43.90$43.90181,860
2011-11-17$42.90$42.9096,450
2011-11-16$40.40$40.4079,200
2011-11-15$40.60$40.6073,480
2011-11-14$40.60$40.6080,910
2011-11-11$41.10$41.1060,830
2011-11-10$40.90$40.90145,410
2011-11-09$45.30$45.30276,000
2011-11-08$40.70$40.7099,870
2011-11-07$40.00$40.0081,530
2011-11-04$40.90$40.9040,290
2011-11-03$41.50$41.5089,930
2011-11-02$40.20$40.2095,400
2011-11-01$39.50$39.50150,370
2011-10-31$43.60$43.6094,220
2011-10-28$44.50$44.5093,180
2011-10-27$43.70$43.70132,980
2011-10-26$40.00$40.0072,900
2011-10-25$39.60$39.6087,250
2011-10-24$42.20$42.20127,840
2011-10-21$38.50$38.50165,130
2011-10-20$41.00$41.00121,360
2011-10-19$40.20$40.2078,570
2011-10-18$42.60$42.6081,090
2011-10-17$40.40$40.4084,470
2011-10-14$42.80$42.8069,580
2011-10-13$42.20$42.2074,680
2011-10-12$40.20$40.20175,110
2011-10-11$41.90$41.90135,110
2011-10-10$41.50$41.50118,020
2011-10-07$38.50$38.50131,630
2011-10-06$41.30$41.30133,770
2011-10-05$38.80$38.80197,620
2011-10-04$36.70$36.70209,490
2011-10-03$34.20$34.20198,870
2011-09-30$39.30$39.30201,680
2011-09-29$44.60$44.60488,990
2011-09-28$38.80$38.80237,090
2011-09-27$42.70$42.70272,410
2011-09-26$46.60$46.60184,190
2011-09-23$50.80$50.80330,400
2011-09-22$44.70$44.70175,690
2011-09-21$47.50$47.50133,240
2011-09-20$50.20$50.20139,910
2011-09-19$52.30$52.30169,950
2011-09-16$53.30$53.30305,320
2011-09-15$60.10$60.10299,070
2011-09-14$70.80$70.80135,080
2011-09-13$66.10$66.1092,960
2011-09-12$61.70$61.7078,980
2011-09-09$60.40$60.4073,720
2011-09-08$62.00$62.0051,600
2011-09-07$64.80$64.8057,440
2011-09-06$61.00$61.0071,100
2011-09-02$60.90$60.9087,140
2011-09-01$66.00$66.0062,580
2011-08-31$68.70$68.7098,780
2011-08-30$72.60$72.60122,610
2011-08-29$69.90$69.9092,610
2011-08-26$64.00$64.0066,150
2011-08-25$61.40$61.40107,640
2011-08-24$63.10$63.10102,170
2011-08-23$58.50$58.50180,740
2011-08-22$51.30$51.30121,560
2011-08-19$54.10$54.10126,300
2011-08-18$57.30$57.30149,670
2011-08-17$62.30$62.3062,410
2011-08-16$63.70$63.70140,890
2011-08-15$68.40$68.40126,860
2011-08-12$69.80$69.80174,950
2011-08-11$62.20$62.20143,850
2011-08-10$59.90$59.90159,590
2011-08-09$64.30$64.30162,380
2011-08-08$57.50$57.50193,180
2011-08-05$61.60$61.60162,170
2011-08-04$61.50$61.50159,750
2011-08-03$68.90$68.90133,740
2011-08-02$66.20$66.20170,770
2011-08-01$71.60$71.6088,130
2011-07-29$73.20$73.2064,290
2011-07-28$74.30$74.3061,610
2011-07-27$76.70$76.70112,880
2011-07-26$77.90$77.9057,130
2011-07-25$77.50$77.5068,090
2011-07-22$79.20$79.2047,270
2011-07-21$79.40$79.4071,940
2011-07-20$77.80$77.8079,070
2011-07-19$75.90$75.90158,030
2011-07-18$72.20$72.20131,700
2011-07-15$77.00$77.0098,140
2011-07-14$78.20$78.20139,290
2011-07-13$79.80$79.80123,760
2011-07-12$81.20$81.20289,280
2011-07-11$85.30$85.30120,000
2011-07-08$90.30$90.30123,030
2011-07-07$88.80$88.80128,040
2011-07-06$88.20$88.20102,670
2011-07-05$89.30$89.3097,590
2011-07-01$88.80$88.80108,360
2011-06-30$90.40$90.40119,460
2011-06-29$89.10$89.10192,610
2011-06-28$86.20$86.20122,320
2011-06-27$84.90$84.90142,760
2011-06-24$81.10$81.10295,170
2011-06-23$81.40$81.40108,770
2011-06-22$80.80$80.80111,060
2011-06-21$80.00$80.00188,820
2011-06-20$76.10$76.10137,000
2011-06-17$75.50$75.50198,480
2011-06-16$77.60$77.60110,560
2011-06-15$79.10$79.10149,860
2011-06-14$81.30$81.30163,930
2011-06-13$77.30$77.30131,750
2011-06-10$77.70$77.70114,800
2011-06-09$76.60$76.60117,350
2011-06-08$75.60$75.60147,500
2011-06-07$79.30$79.30157,970
2011-06-06$79.90$79.90189,940
2011-06-03$77.30$77.30244,550
2011-06-02$79.40$79.40340,160
2011-06-01$81.10$81.101,113,530
2011-05-31$106.90$106.90166,810
2011-05-27$102.50$102.5083,370
2011-05-26$100.60$100.60163,060
2011-05-25$102.50$102.50139,370
2011-05-24$101.60$101.60110,990
2011-05-23$102.50$102.50110,610
2011-05-20$103.40$103.40204,600
2011-05-19$108.20$108.20100,810
2011-05-18$109.40$109.40125,460
2011-05-17$105.90$105.90188,970
2011-05-16$112.70$112.70100,920
2011-05-13$113.60$113.60139,370
2011-05-12$117.00$117.0078,100
2011-05-11$116.30$116.3085,790
2011-05-10$119.20$119.2079,350
2011-05-09$119.90$119.90120,830
2011-05-06$118.00$118.00224,320
2011-05-05$122.50$122.50239,280
2011-05-04$113.70$113.70259,790
2011-05-03$116.40$116.40170,000
2011-05-02$117.00$117.00186,770
2011-04-29$118.50$118.5081,700
2011-04-28$117.10$117.10110,000
2011-04-27$118.10$118.10114,100
2011-04-26$118.50$118.50150,000
2011-04-25$119.80$119.80174,080
2011-04-21$117.40$117.40193,230
2011-04-20$115.40$115.40260,640
2011-04-19$118.00$118.00437,630
2011-04-18$124.70$124.70201,840
2011-04-15$128.10$128.10137,980
2011-04-14$130.10$130.10320,750
2011-04-13$127.20$127.20207,940
2011-04-12$129.30$129.30379,160
2011-04-11$133.10$133.10321,170
2011-04-08$137.70$137.70515,580
2011-04-07$133.00$133.001,037,530
2011-04-06$144.70$144.703,728,800
2011-04-05$248.80$248.80341,160
2011-04-04$246.80$246.8066,190
2011-04-01$245.30$245.3075,130
2011-03-31$248.70$248.7066,860
2011-03-30$250.70$250.7098,100
2011-03-29$247.00$247.0097,480
2011-03-28$235.80$235.8067,600
2011-03-25$240.40$240.4078,330
2011-03-24$235.90$235.9047,260
2011-03-23$234.80$234.8087,460
2011-03-22$233.40$233.4077,850
2011-03-21$236.30$236.30129,270
2011-03-18$228.40$228.40169,260
2011-03-17$232.40$232.40148,320
2011-03-16$236.30$236.30149,230
2011-03-15$232.60$232.60200,020
2011-03-14$231.90$231.90377,720
2011-03-11$242.80$242.80130,130
2011-03-10$251.10$251.1072,540
2011-03-09$258.50$258.5055,780
2011-03-08$261.00$261.0045,000
2011-03-07$260.80$260.8056,310
2011-03-04$267.50$267.5049,190
2011-03-03$268.90$268.9077,490
2011-03-02$263.80$263.8071,380
2011-03-01$260.60$260.6066,450
2011-02-28$265.20$265.2050,330
2011-02-25$267.00$267.0056,430
2011-02-24$267.80$267.8059,520
2011-02-23$263.50$263.5079,640
2011-02-22$269.40$269.40104,940
2011-02-18$273.70$273.7055,220
2011-02-17$278.00$278.0040,850
2011-02-16$277.90$277.9051,730
2011-02-15$276.80$276.8041,430
2011-02-14$279.00$279.0045,110
2011-02-11$277.70$277.7046,960
2011-02-10$276.60$276.6047,230
2011-02-09$275.30$275.3099,420
2011-02-08$282.30$282.3057,110
2011-02-07$283.80$283.8077,080
2011-02-04$289.90$289.90104,420
2011-02-03$287.80$287.80123,270
2011-02-02$292.00$292.00130,730
2011-02-01$298.60$298.60326,780
2011-01-31$272.70$272.7099,250
2011-01-28$273.90$273.9081,260
2011-01-27$283.40$283.4079,360
2011-01-26$276.40$276.4074,310
2011-01-25$275.60$275.6072,120
2011-01-24$274.50$274.50100,590
2011-01-21$273.00$273.00107,380
2011-01-20$276.30$276.3060,980
2011-01-19$282.80$282.8082,750
2011-01-18$289.80$289.8070,430
2011-01-14$287.30$287.3072,540
2011-01-13$292.00$292.0053,770
2011-01-12$297.10$297.1099,670
2011-01-11$289.80$289.80104,350
2011-01-10$286.20$286.2080,490
2011-01-07$273.90$273.90106,990
2011-01-06$282.20$282.2077,770
2011-01-05$289.10$289.1085,160
2011-01-04$286.10$286.1084,190
2011-01-03$295.40$295.40111,970