Summary
Updated Aug 30, 2026
Michael J. Malecek is Chief Legal Officer of PROTHENA CORP PUBLIC LTD CO (PRTA). 2 SEC Form 4 filings on record going back to 2025, most recently on 5 March 2026.
Recent Transactions
1Every recent SEC Form 4 transaction Michael J. Malecek 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 Michael J. Malecek 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.
- William P. Scully - $3.86M of PRTA open-market activity in the last 12 months
- Michael John Isaacs - $71K of PRTA open-market activity in the last 12 months
- Anne Evans Kingston - $65K of PRTA 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 Michael J. Malecek?
Michael J. Malecek is a corporate insider, tracked as Chief Legal Officer of PROTHENA CORP PUBLIC LTD CO (PRTA). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Michael J. Malecek last file a Form 4?
The most recent primary Form 4 on record is dated 5 March 2026, one of 2 filings going back to 2025.
Where can I see all of Michael J. Malecek'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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