Summary
Updated Aug 30, 2026
Martin J. Gepsman is Director of CME GROUP INC. (CME). 5 SEC Form 4 filings on record going back to 2024, most recently on 29 June 2026. Most recent open-market trade: sold $92K of CME on 20 February 2026. Lifetime open-market sales: $263K.
Recent Transactions
5Every recent SEC Form 4 transaction Martin J. Gepsman 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 Martin J. Gepsman 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.
- Terrence A. Duffy - $10.45M of CME open-market activity in the last 12 months
- Jonathan L. Marcus - $2.33M of CME open-market activity in the last 12 months
- Derek Sammann - $1.98M of CME open-market activity in the last 12 months
- Hilda Harris Piell - $1.75M of CME open-market activity in the last 12 months
- Ken Vroman - $1.59M of CME open-market activity in the last 12 months
- Bryan T. Durkin - $1.30M of CME 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 Martin J. Gepsman?
Martin J. Gepsman is a corporate insider, tracked as Director of CME GROUP INC. (CME). 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 Martin J. Gepsman submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Martin J. Gepsman been buying or selling stock?
Recorded transactions: 0 open-market purchases and 3 open-market sales ($263K) across all tracked filings.
Where can I see all of Martin J. Gepsman'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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