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AMSC

American Superconductor Corp /De/ SEC filings
Motors & Generators · Nasdaq · Incorporated in DE
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Filing history
2026-11-04
Quarterly report 10-Q
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2026-11-04
Current report 8-K
Earnings results
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2026-09-21
Insider trade 4
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2026-09-21
Current report 8-K
Exec/director change
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2026-08-05
Quarterly report 10-Q
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2026-08-05
Current report 8-K
Earnings resultsShareholder vote
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2026-07-31
Passive 5%+ stake update SCHEDULE 13G/A
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2026-06-18
Annual report to shareholders ARS
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2026-06-18
Proxy material DEFA14A
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2026-06-18
Proxy statement (shareholder vote) DEF 14A
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2026-06-12
Insider trade 4
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2026-06-11
Planned insider sale 144
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2026-06-11
Insider trade 4
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2026-06-11
Insider trade 4
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2026-06-11
Planned insider sale 144
Filing ↗
2026-06-10
Insider trade 4
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2026-06-10
Insider trade 4
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2026-06-10
Planned insider sale 144
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2026-06-08
Planned insider sale 144
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2026-06-08
Planned insider sale 144
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2026-06-03
Planned insider sale 144
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2026-06-03
Planned insider sale 144
Filing ↗
2026-06-03
Insider trade 4
Filing ↗
2026-06-03
Insider trade 4
Filing ↗
2026-06-02
Planned insider sale 144
Filing ↗
2026-06-02
Planned insider sale 144
Filing ↗
2026-06-02
Current report 8-K
Exec/director change
Filing ↗
2026-05-29
Conflict minerals report SD
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2026-05-27
Annual report 10-K
Filing ↗
2026-05-27
Current report 8-K
Earnings results
Filing ↗
2026-04-29
Passive 5%+ stake SCHEDULE 13G
Filing ↗
2026-04-07
Insider trade 4
Filing ↗
2026-04-07
Insider trade 4
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2026-04-07
Insider trade 4
Filing ↗
2026-04-07
Insider trade 4
Filing ↗
2026-04-07
Insider trade 4
Filing ↗
2026-04-07
Insider trade 4
Filing ↗
2026-03-26
Passive 5%+ stake update SCHEDULE 13G/A
Filing ↗
2026-02-26
Insider trade 4
Filing ↗
2026-02-17
Current report (amended) 8-K/A
Filing ↗