Summary
Updated Aug 30, 2026
Mary Beth Harler is Chief Executive Officer of IGM Biosciences, Inc. (IGMS). 4 SEC Form 4 filings on record going back to 2024, most recently on 14 August 2025. Most recent open-market trade: sold $18K of IGMS on 23 July 2025. Lifetime open-market sales: $31K.
Recent Transactions
4Every recent SEC Form 4 transaction Mary Beth Harler has reported, most recent first.
Other Insiders Active in the Same Stocks
Insiders who have reported open-market trades at the same companies as Mary Beth Harler. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Misbah Tahir - $24K of IGMS open-market activity on record
- Lisa Lynn Decker - $14K of IGMS open-market activity on record
- Steven Weber - $4K of IGMS open-market activity on record
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Mary Beth Harler?
Mary Beth Harler is a corporate insider, tracked as Chief Executive Officer of IGM Biosciences, Inc. (IGMS). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Mary Beth Harler last file a Form 4?
The most recent primary Form 4 on record is dated 14 August 2025, one of 4 filings going back to 2024.
Has Mary Beth Harler been buying or selling stock?
Recorded transactions: 0 open-market purchases and 2 open-market sales ($31K) across all tracked filings.
Where can I see all of Mary Beth Harler'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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