---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-26-030822"
form_type: "8-K"
ticker: "AMSC"
cik: "0000880807"
company_name: "AMERICAN SUPERCONDUCTOR CORP /DE/"
filed_at: "2026-09-21T20:07:23+00:00"
generated_at: "2026-09-21T20:08:17.117539+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.2
calibrated_materiality_score: 0.2
confidence: "high"
source: SEC EDGAR
---

# AMSC director Barbara G. Littlefield resigns from board effective Sept. 18, 2026

## Summary
- Barbara G. Littlefield notified the AMSC Board of her resignation on Sept. 17, 2026.
- Resignation takes effect at 12:00 p.m. ET on Friday, Sept. 18, 2026.
- No reason for departure or successor appointment was disclosed in the filing.

## SEC filing metadata
- accession: 0001437749-26-030822
- form_type: 8-K
- ticker: AMSC
- cik: 0000880807
- company_name: AMERICAN SUPERCONDUCTOR CORP /DE/
- filed_at: 2026-09-21T20:07:23+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.2
- calibrated_materiality_score: 0.2
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/880807/000143774926030822/0001437749-26-030822-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/880807/000143774926030822/amsc20260921_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-26-030822
- JSON: https://secwatch.observer/filing/0001437749-26-030822.json
- Plain text: https://secwatch.observer/filing/0001437749-26-030822.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.