AMERICAN SUPERCONDUCTOR CORP /DE/ reports

Company Names, identifiers, and filing context for this profile. 1 identity field
Company location
Devens, MA
SEC filing record 1 source field available
Fiscal year end
31 March
AMERICAN SUPERCONDUCTOR CORP /DE/ has filed 1,308 SEC EDGAR filings since 29 Jul 1996

SEC filing history

Showing 1-25 of 844 matching filings.

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25
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1
144 File 000-19672

144 filing

Filing date
03 Jun 2026
Reporting date
Not listed
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144 File 000-19672

144 filing

Filing date
03 Jun 2026
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4

4

Filing date
03 Jun 2026
Reporting date
01 Jun 2026
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4

4

Filing date
03 Jun 2026
Reporting date
01 Jun 2026
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144 File 000-19672

144 filing

Filing date
02 Jun 2026
Reporting date
Not listed
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144 File 000-19672

144 filing

Filing date
02 Jun 2026
Reporting date
Not listed
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SD File 000-19672

FORM SD

Filing date
29 May 2026
Reporting date
Not listed
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SCHEDULE 13G File 005-41994

SCHEDULE 13G filing

Filing date
29 Apr 2026
Reporting date
Not listed
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4

4

Filing date
07 Apr 2026
Reporting date
03 Apr 2026
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4

4

Filing date
07 Apr 2026
Reporting date
03 Apr 2026
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4

4

Filing date
07 Apr 2026
Reporting date
03 Apr 2026
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4

4

Filing date
07 Apr 2026
Reporting date
03 Apr 2026
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4

4

Filing date
07 Apr 2026
Reporting date
03 Apr 2026
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4

4

Filing date
07 Apr 2026
Reporting date
03 Apr 2026
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SCHEDULE 13G/A File 005-41994

SCHEDULE 13G/A filing

Filing date
26 Mar 2026
Reporting date
Not listed
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4

4

Filing date
26 Feb 2026
Reporting date
24 Feb 2026
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8-K/A File 000-19672

FORM 8-K/A

Filing date
17 Feb 2026
Reporting date
05 Dec 2025
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SCHEDULE 13G/A File 005-41994

SCHEDULE 13G/A filing

Filing date
30 Jan 2026
Reporting date
Not listed
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