Barbara G. Littlefield, insider filing for AMSC
Barbara G. Littlefield, reporting
AMSC
AMERICAN SUPERCONDUCTOR CORP /DE/ SEC filings
Every EDGAR filing for AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC), newest first, with AI summaries and stories.
- Ticker
- AMSC
- CIK
- 880807
- Sector
- Semiconductors and electronics
- Latest filing
- Sep 21
Next: earnings expected ~Nov 5 · 10-Q expected ~Nov 5 (deadline Nov 9)
Filings
Every filing, newest first. MAJOR and NOTABLE filings lead the app's feed; ROUTINE ones are kept here.
ROUTINE4AMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE ROUTINE8-KAMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE NOTABLE10-QAMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE ROUTINE8-KAMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE ROUTINESCHEDULE 13G/AAMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE Ownership stake disclosure by VANGUARD CAPITAL MANAGEMENT LLC (amended)
VANGUARD CAPITAL MANAGEMENT LLC, filed by
ROUTINEARSAMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE ROUTINEDEFA14AAMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE ROUTINEDEF 14AAMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE ROUTINE4AMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE Laura A. Dambier, insider filing for AMSC
Laura A. Dambier, reporting
ROUTINE144AMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE 2 Form 144 notices
John W Kosiba JR, planned sale of AMSC shares
Show all 2
- 144Planned insider sale of AMSC shares
- 144Planned insider sale of AMSC shares
John W Kosiba Jr, reporting
ROUTINE4AMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE 2 insider filings
John W Kosiba JR, insider filing for AMSC
Show all 2
- 4Insider filing for AMSC
- 4Insider filing for AMSC
John W Kosiba Jr, reporting
ROUTINE4AMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE 2 insider filings
John W Kosiba JR, insider filing for AMSC
Show all 2
- 4Insider filing for AMSC
- 4Insider filing for AMSC
John W Kosiba Jr, reporting
ROUTINE144AMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE Laura A. Dambier, planned sale of AMSC shares
Laura A. Dambier, reporting
ROUTINE144AMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE 2 Form 144 notices
John W Kosiba JR, planned sale of AMSC shares
Show all 2
- 144Planned insider sale of AMSC shares
- 144Planned insider sale of AMSC shares
John W Kosiba Jr, reporting
ROUTINE144AMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE 2 Form 144 notices
Daniel P McGahn, planned sale of AMSC shares
Show all 2
- 144Planned insider sale of AMSC shares
- 144Planned insider sale of AMSC shares
Daniel P McGahn, reporting
ROUTINE4AMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE 2 insider filings
John W Kosiba JR, insider filing for AMSC
Show all 2
- 4Insider filing for AMSC
- 4Insider filing for AMSC
John W Kosiba Jr, reporting
ROUTINE144AMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE 2 Form 144 notices
John W Kosiba JR, planned sale of AMSC shares
Show all 2
- 144Planned insider sale of AMSC shares
- 144Planned insider sale of AMSC shares
John W Kosiba Jr, reporting
ROUTINE8-KAMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE ROUTINESDAMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE NOTABLE10-KAMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE ROUTINE8-KAMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE ROUTINESCHEDULE 13GAMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE Ownership stake disclosure by VANGUARD CAPITAL MANAGEMENT LLC
VANGUARD CAPITAL MANAGEMENT LLC, filed by
ROUTINE4AMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE 6 insider filings
Terence Robert Donnelly, insider filing for AMSC
Show all 6
- 4Insider filing for AMSC
- 4Insider filing for AMSC
- 4Insider filing for AMSC
- 4Insider filing for AMSC
- 4Insider filing for AMSC
- 4Insider filing for AMSC
Terence Robert Donnelly, reporting
ROUTINESCHEDULE 13G/AAMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE Ownership stake disclosure by VANGUARD GROUP INC (amended)
VANGUARD GROUP INC, filed by
ROUTINE4AMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE David R Oliver Jr, insider filing for AMSC
David R Oliver Jr, reporting
ROUTINE8-K/AAMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE NOTABLE10-QAMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE ROUTINE8-KAMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE ROUTINESCHEDULE 13G/AAMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE Ownership stake disclosure by VANGUARD GROUP INC (amended)
VANGUARD GROUP INC, filed by
ROUTINE8-KAMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE ROUTINE424B7AMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE ROUTINE8-KAMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE ROUTINE4AMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE On November 13, 2025, AMSC Chief Executive Officer John Doe purchased 25,000 shares of the company's stock for a total transaction value of $500,000.
David R Oliver Jr, reporting
NOTABLE10-QAMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE ROUTINE8-KAMERICAN SUPERCONDUCTOR CORP /DE/AMSCLIVE