Summary
Updated Aug 31, 2026
Mary Dibiase is Chief Operating Officer of X4 Pharmaceuticals, Inc (XFOR). 1 SEC Form 4 filing on record, dated 8 October 2024. Most recent open-market trade: sold $38K of XFOR on 8 October 2024. Lifetime open-market sales: $38K.
Recent Transactions
2Every recent SEC Form 4 transaction Mary Dibiase has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Mary Dibiase go back to 2024: 1 primary Form 4 filing, an average of 0.3 per year. 2 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 Mary Dibiase 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.
- Adam R. Craig - $461K of XFOR open-market activity in the last 12 months
- David Kirske - $109K of XFOR open-market activity in the last 12 months
- John Volpone - $109K of XFOR 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 Mary Dibiase?
Mary Dibiase is a corporate insider, tracked as Chief Operating Officer of X4 Pharmaceuticals, Inc (XFOR). InsiderAlpha holds 1 primary Form 4 filing for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Mary Dibiase last file a Form 4?
The only primary Form 4 on record is dated 8 October 2024.
Has Mary Dibiase been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($38K) across all tracked filings.
Where can I see all of Mary Dibiase'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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