Summary
Updated Aug 31, 2026
Mark G. Foletta is Director of DEXCOM INC (DXCM). 13 SEC Form 4 filings on record going back to 2025, most recently on 4 August 2026. Most recent open-market trade: sold $171K of DXCM on 4 August 2026. Lifetime open-market sales: $1.43M.
Recent Transactions
19Every recent SEC Form 4 transaction Mark G. Foletta has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Mark G. Foletta go back to 2025: 13 primary Form 4 filings, an average of 6.5 per year. 6 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 Mark G. Foletta 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.
- Kevin R. Sayer - $8.30M of DXCM open-market activity in the last 12 months
- Jacob Steven Leach - $1.00M of DXCM open-market activity in the last 12 months
- Michael Jon Brown - $730K of DXCM open-market activity in the last 12 months
- Jon Coleman - $723K of DXCM open-market activity in the last 12 months
- Richard Alexander Collins - $389K of DXCM open-market activity in the last 12 months
- Jereme M. Sylvain - $358K of DXCM 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 Mark G. Foletta?
Mark G. Foletta is a corporate insider, tracked as Director of DEXCOM INC (DXCM). InsiderAlpha holds 13 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Mark G. Foletta submitted recently?
3 primary Form 4 filings in the last 90 days, covering 2 companies.
Has Mark G. Foletta been buying or selling stock?
Recorded transactions: 0 open-market purchases and 11 open-market sales ($1.43M) across all tracked filings.
Where can I see all of Mark G. Foletta'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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