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 — 1991

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1991-12-31$140.00$140.003,855
1991-12-30$136.67$136.675,505
1991-12-27$135.00$135.002,190
1991-12-26$135.00$135.004,905
1991-12-24$126.67$126.672,730
1991-12-23$123.33$123.334,155
1991-12-20$108.33$108.337,170
1991-12-19$110.83$110.834,635
1991-12-18$111.67$111.676,630
1991-12-17$115.00$115.008,640
1991-12-16$121.67$121.675,415
1991-12-13$120.00$120.0013,245
1991-12-12$115.00$115.0048,405