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 — 2020

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2020-12-31$23.42$23.42494,400——
2020-12-30$23.23$23.231,290,700——
2020-12-29$21.87$21.87647,100——
2020-12-28$25.10$25.10436,100——
2020-12-24$25.22$25.22232,100——
2020-12-23$25.76$25.76476,300——
2020-12-22$24.67$24.67480,800——
2020-12-21$23.19$23.19301,000——
2020-12-18$22.69$22.691,572,100——
2020-12-17$22.02$22.02330,000——
2020-12-16$21.95$21.95404,900——
2020-12-15$21.67$21.67386,800——
2020-12-14$20.21$20.21300,000——
2020-12-11$19.47$19.47158,000——
2020-12-10$19.68$19.68171,200——
2020-12-09$19.18$19.18254,700——
2020-12-08$20.39$20.39323,700——
2020-12-07$18.71$18.71219,600——
2020-12-04$18.87$18.87195,600——
2020-12-03$18.02$18.02343,400——
2020-12-02$17.84$17.84249,000——
2020-12-01$18.70$18.70351,000——
2020-11-30$19.88$19.88359,900——
2020-11-27$19.52$19.52223,000——
2020-11-25$19.16$19.16542,700——
2020-11-24$18.42$18.42822,100——
2020-11-23$17.64$17.64492,300——
2020-11-20$16.00$16.00291,100——
2020-11-19$15.35$15.35261,100——
2020-11-18$15.32$15.32294,800——
2020-11-17$15.11$15.11244,100——
2020-11-16$14.70$14.70294,900——
2020-11-13$14.22$14.22196,500——
2020-11-12$13.92$13.92194,500——
2020-11-11$13.94$13.94217,100——
2020-11-10$13.40$13.40233,900——
2020-11-09$13.09$13.09405,300——
2020-11-06$13.33$13.33652,100——
2020-11-05$14.63$14.63327,300——
2020-11-04$14.58$14.58219,700——
2020-11-03$14.95$14.95384,000——
2020-11-02$14.26$14.26279,500——
2020-10-30$13.91$13.91465,900——
2020-10-29$14.18$14.18259,800——
2020-10-28$14.26$14.26469,300——
2020-10-27$14.60$14.60375,300——
2020-10-26$14.69$14.69759,900——
2020-10-23$15.03$15.03519,300——
2020-10-22$15.13$15.132,534,300——
2020-10-21$17.10$17.10342,500——
2020-10-20$17.47$17.47396,400——
2020-10-19$17.22$17.22363,100——
2020-10-16$17.57$17.57286,000——
2020-10-15$18.25$18.25376,900——
2020-10-14$17.65$17.65272,500——
2020-10-13$17.29$17.29220,400——
2020-10-12$17.31$17.31272,300——
2020-10-09$17.01$17.01283,200——
2020-10-08$16.32$16.32535,100——
2020-10-07$17.54$17.541,150,800——
2020-10-06$15.79$15.79412,000——
2020-10-05$14.85$14.85312,900——
2020-10-02$14.35$14.35193,500——
2020-10-01$14.23$14.23287,000——
2020-09-30$14.48$14.48712,200——
2020-09-29$16.03$16.032,047,200——
2020-09-28$14.97$14.97833,800——
2020-09-25$13.38$13.38554,600——
2020-09-24$12.01$12.01249,700——
2020-09-23$11.70$11.70199,700——
2020-09-22$11.86$11.86193,500——
2020-09-21$11.63$11.63226,100——
2020-09-18$12.39$12.39240,000——
2020-09-17$12.14$12.14135,700——
2020-09-16$12.42$12.42115,400——
2020-09-15$12.17$12.1777,600——
2020-09-14$12.18$12.1884,900——
2020-09-11$11.91$11.91101,900——
2020-09-10$11.85$11.85100,300——
2020-09-09$12.08$12.08177,700——
2020-09-08$11.40$11.40278,200——
2020-09-04$11.96$11.96247,400——
2020-09-03$12.25$12.25193,400——
2020-09-02$13.01$13.01118,300——
2020-09-01$13.01$13.01138,400——
2020-08-31$12.56$12.56153,000——
2020-08-28$12.79$12.79101,900——
2020-08-27$12.65$12.65187,300——
2020-08-26$12.90$12.90133,200——
2020-08-25$13.15$13.15128,700——
2020-08-24$13.06$13.06239,600——
2020-08-21$12.84$12.84214,900——
2020-08-20$12.65$12.65197,500——
2020-08-19$12.87$12.87325,800——
2020-08-18$13.05$13.05317,200——
2020-08-17$12.31$12.31244,800——
2020-08-14$12.28$12.28165,900——
2020-08-13$12.22$12.22155,400——
2020-08-12$12.14$12.14177,700——
2020-08-11$11.71$11.71408,900——
2020-08-10$11.87$11.87351,900——
2020-08-07$11.51$11.51469,500——
2020-08-06$11.28$11.28636,200——
2020-08-05$10.38$10.38305,400——
2020-08-04$10.01$10.01284,800——
2020-08-03$9.67$9.67150,000——
2020-07-31$9.30$9.30163,400——
2020-07-30$9.33$9.33223,000——
2020-07-29$9.70$9.70181,200——
2020-07-28$9.64$9.64109,900——
2020-07-27$9.74$9.74129,500——
2020-07-24$9.44$9.4485,300——
2020-07-23$9.52$9.52328,400——
2020-07-22$9.43$9.43188,100——
2020-07-21$9.38$9.38219,400——
2020-07-20$9.20$9.20169,700——
2020-07-17$9.21$9.21254,800——
2020-07-16$9.17$9.17130,200——
2020-07-15$9.16$9.16224,700——
2020-07-14$8.95$8.95299,400——
2020-07-13$8.62$8.62314,500——
2020-07-10$8.97$8.97329,300——
2020-07-09$8.53$8.53178,800——
2020-07-08$8.26$8.26142,600——
2020-07-07$7.95$7.95201,700——
2020-07-06$8.07$8.07184,900——
2020-07-02$7.82$7.82119,100——
2020-07-01$7.70$7.70195,000——
2020-06-30$8.13$8.13290,100——
2020-06-29$7.64$7.64204,600——
2020-06-26$7.28$7.28422,800——
2020-06-25$7.38$7.38128,100——
2020-06-24$7.36$7.36242,800——
2020-06-23$7.71$7.71164,800——
2020-06-22$7.73$7.73167,200——
2020-06-19$7.85$7.85437,200——
2020-06-18$7.69$7.69216,800——
2020-06-17$7.60$7.60169,200——
2020-06-16$7.84$7.84248,600——
2020-06-15$7.52$7.52166,400——
2020-06-12$7.21$7.21133,300——
2020-06-11$6.99$6.99252,500——
2020-06-10$7.79$7.79159,400——
2020-06-09$8.03$8.03159,000——
2020-06-08$8.23$8.23153,000——
2020-06-05$7.96$7.96481,500——
2020-06-04$8.22$8.22389,400——
2020-06-03$7.23$7.23417,000——
2020-06-02$7.91$7.91224,100——
2020-06-01$7.70$7.70188,100——
2020-05-29$7.25$7.25280,800——
2020-05-28$7.52$7.52393,200——
2020-05-27$7.49$7.49251,600——
2020-05-26$6.87$6.87183,400——
2020-05-22$6.66$6.66278,200——
2020-05-21$6.51$6.51325,400——
2020-05-20$6.16$6.16297,800——
2020-05-19$6.10$6.10117,500——
2020-05-18$6.23$6.23207,200——
2020-05-15$5.84$5.84135,700——
2020-05-14$5.83$5.83183,000——
2020-05-13$6.02$6.02206,800——
2020-05-12$5.96$5.96192,900——
2020-05-11$6.01$6.01138,700——
2020-05-08$6.05$6.05115,900——
2020-05-07$5.87$5.87105,400——
2020-05-06$5.97$5.9788,400——
2020-05-05$6.07$6.07212,100——
2020-05-04$5.92$5.92153,900——
2020-05-01$5.68$5.68238,800——
2020-04-30$5.75$5.75147,200——
2020-04-29$5.90$5.90272,800——
2020-04-28$5.61$5.61111,600——
2020-04-27$5.64$5.64157,000——
2020-04-24$5.38$5.38115,100——
2020-04-23$5.23$5.23144,600——
2020-04-22$5.16$5.16113,100——
2020-04-21$5.19$5.19150,500——
2020-04-20$5.36$5.36141,200——
2020-04-17$5.53$5.53157,900——
2020-04-16$5.37$5.37205,700——
2020-04-15$5.48$5.48111,600——
2020-04-14$5.84$5.84153,800——
2020-04-13$5.77$5.77112,500——
2020-04-09$5.94$5.94174,400——
2020-04-08$5.87$5.87164,100——
2020-04-07$5.62$5.62292,000——
2020-04-06$5.82$5.82274,500——
2020-04-03$5.58$5.58239,400——
2020-04-02$5.64$5.64176,600——
2020-04-01$5.24$5.24242,600——
2020-03-31$5.48$5.48261,000——
2020-03-30$5.30$5.30284,800——
2020-03-27$5.22$5.22220,300——
2020-03-26$5.68$5.68266,900——
2020-03-25$5.43$5.43162,800——
2020-03-24$5.48$5.48302,600——
2020-03-23$4.76$4.76280,900——
2020-03-20$4.64$4.64502,700——
2020-03-19$4.72$4.72458,200——
2020-03-18$4.70$4.70450,900——
2020-03-17$5.62$5.62373,100——
2020-03-16$4.96$4.96331,300——
2020-03-13$5.45$5.45261,400——
2020-03-12$5.21$5.21278,400——
2020-03-11$5.71$5.71315,200——
2020-03-10$6.34$6.34223,900——
2020-03-09$6.26$6.26244,700——
2020-03-06$7.02$7.02231,500——
2020-03-05$7.36$7.36166,200——
2020-03-04$7.42$7.42149,000——
2020-03-03$7.19$7.19252,700——
2020-03-02$7.28$7.28193,600——
2020-02-28$6.85$6.85314,300——
2020-02-27$6.85$6.85341,600——
2020-02-26$7.73$7.73182,800——
2020-02-25$7.34$7.34281,600——
2020-02-24$8.15$8.15264,700——
2020-02-21$8.09$8.09226,100——
2020-02-20$8.31$8.31198,200——
2020-02-19$8.05$8.05316,400——
2020-02-18$7.72$7.72198,200——
2020-02-14$7.88$7.88240,000——
2020-02-13$7.96$7.96159,400——
2020-02-12$7.80$7.80290,700——
2020-02-11$7.39$7.39415,600——
2020-02-10$7.24$7.24300,800——
2020-02-07$7.07$7.07230,200——
2020-02-06$7.32$7.321,174,300——
2020-02-05$6.88$6.88248,700——
2020-02-04$6.30$6.30218,800——
2020-02-03$6.43$6.43184,300——
2020-01-31$6.28$6.28229,000——
2020-01-30$6.55$6.55195,600——
2020-01-29$6.90$6.90288,000——
2020-01-28$7.17$7.17323,400——
2020-01-27$7.56$7.56244,900——
2020-01-24$7.87$7.87601,500——
2020-01-23$7.32$7.32169,600——
2020-01-22$7.60$7.60196,500——
2020-01-21$8.21$8.21242,100——
2020-01-17$7.88$7.88167,600——
2020-01-16$7.81$7.81283,200——
2020-01-15$7.58$7.58116,400——
2020-01-14$7.62$7.62221,800——
2020-01-13$7.45$7.45225,500——
2020-01-10$7.24$7.24295,400——
2020-01-09$7.40$7.40185,700——
2020-01-08$7.41$7.41271,900——
2020-01-07$7.56$7.56167,200——
2020-01-06$7.68$7.68182,900——
2020-01-03$7.68$7.68173,600——
2020-01-02$7.89$7.89140,000——