Summary
Updated Aug 30, 2026
Margaret D. Klein files SEC Form 4 reports at AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC). 2 SEC Form 4 filings on record going back to 2025, most recently on 7 April 2026. Most recent open-market trade: bought $3K of AMSC on 6 August 2025. Lifetime open-market purchases: $3K.
Recent Transactions
2Every recent SEC Form 4 transaction Margaret D. Klein has reported, most recent first.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Margaret D. Klein files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Daniel P. McGahn - $5.32M of AMSC open-market activity in the last 12 months
- John W. Kosiba Jr. - $2.32M of AMSC open-market activity in the last 12 months
- Laura A. Dambier - $151K of AMSC open-market activity in the last 12 months
- David R. Oliver Jr. - $8K of AMSC open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Margaret D. Klein?
Margaret D. Klein is a corporate insider of AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Margaret D. Klein last file a Form 4?
The most recent primary Form 4 on record is dated 7 April 2026, one of 2 filings going back to 2025.
Has Margaret D. Klein been buying or selling stock?
Recorded transactions: 1 open-market purchase ($3K) and 0 open-market sales across all tracked filings.
Where can I see all of Margaret D. Klein's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
Learn More
Follow Margaret D. Klein and every insider like them
A free account opens the full scored daily plan and every past day, a watchlist for any ticker, and 3 months of price history on every company page. No card.
Free plan available · Paid plans start with a 7-day free trial
