Summary
Updated Aug 31, 2026
Sharon Mates files SEC Form 4 reports at Seaport Therapeutics, Inc. (SPTX). 5 SEC Form 4 filings on record going back to 2024, most recently on 4 May 2026. Most recent open-market trade: sold $130K of ITCI on 6 December 2024. Lifetime open-market sales: $8.72M.
Recent Transactions
6Every recent SEC Form 4 transaction Sharon Mates has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Sharon Mates go back to 2024: 5 primary Form 4 filings, an average of 1.7 per year. 8 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 Sharon Mates 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.
- SUVRETTA CAPITAL MANAGEMENT, LLC - $22.44M of BNTC open-market activity in the last 12 months
- ARCH Venture Partners XII, LLC - $19.80M of SPTX open-market activity in the last 12 months
- Robert J. Hombach - $236K of SPTX 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 Sharon Mates?
Sharon Mates is a corporate insider of Seaport Therapeutics, Inc. (SPTX). InsiderAlpha holds 5 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Sharon Mates last file a Form 4?
The most recent primary Form 4 on record is dated 4 May 2026, one of 5 filings going back to 2024.
Has Sharon Mates been buying or selling stock?
Recorded transactions: 0 open-market purchases and 4 open-market sales ($8.72M) across all tracked filings.
Where can I see all of Sharon Mates'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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