AMERICAN SUPERCONDUCTOR CORP /DE/
AMSC · Motors and Generators
Latest available SEC filing: 10-Q ·
Latest disclosures
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Form 10-Q
SEC filing · Filed
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Littlefield Barbara G.: Form 4
Insider disclosure · Filed · Report period 18 Sep 2026
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Form 4
SEC filing · Filed
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Latest financial period: Q2 2026
Financial facts · Filed
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Form 10-Q
SEC filing · Filed
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Form 4
SEC filing · Filed
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Form 4
SEC filing · Filed
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Form 4
SEC filing · Filed
Institutional holders by security
Choose a share class to see reported 13F positions and quarterly changes. Different securities have separate holder histories.
Company details and SEC sources
CIK 0000880807 · SEC filing index. Filing dates describe disclosures, not live market data.
- Listed symbols
- AMSC on Nasdaq
- SEC industry group
- Motors and Generators (Office of Manufacturing)
- Business address
- Sixty Four Jackson Road, Devens, MA, 01434
- Incorporated in
- DE
- Fiscal year end
- 31 March
At a glance
Names, identifiers, and filing context for this profile.
2 identity fields