Summary
Updated Aug 30, 2026
Arthur H. House 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: sold $494K of AMSC on 6 August 2025. Lifetime open-market sales: $494K.
Recent Transactions
3Every recent SEC Form 4 transaction Arthur H. House has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Arthur H. House go back to 2025: 2 primary Form 4 filings, an average of 1.0 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Arthur H. House 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 Arthur H. House?
Arthur H. House 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 Arthur H. House 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 Arthur H. House been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($494K) across all tracked filings.
Where can I see all of Arthur H. House'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.
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