Summary
Updated Aug 31, 2026
John W. Kosiba Jr. is SVP, CFO & Treasurer of AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC). 5 SEC Form 4 filings on record going back to 2024, most recently on 11 June 2026. Most recent open-market trade: sold $66K of AMSC on 11 June 2026. Lifetime open-market sales: $7.01M.
Recent Transactions
16Every recent SEC Form 4 transaction John W. Kosiba Jr. has reported, most recent first.
Trading Pattern
InsiderAlpha's records for John W. Kosiba Jr. go back to 2024: 5 primary Form 4 filings, an average of 1.7 per year. 12 recorded transactions carry a Rule 10b5-1 flag, meaning they were pre-scheduled under a written trading plan rather than discretionary.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies John W. Kosiba Jr. 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
- 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 John W. Kosiba Jr.?
John W. Kosiba Jr. is a corporate insider, tracked as SVP, CFO & Treasurer of AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC). InsiderAlpha holds 5 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has John W. Kosiba Jr. submitted recently?
3 primary Form 4 filings in the last 90 days, covering 1 company.
Has John W. Kosiba Jr. been buying or selling stock?
Recorded transactions: 0 open-market purchases and 15 open-market sales ($7.01M) across all tracked filings.
Where can I see all of John W. Kosiba Jr.'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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