Summary
Updated Aug 31, 2026
Sheila C. Cheston is Director of Digimarc CORP (DMRC). 4 SEC Form 4 filings on record going back to 2024, most recently on 1 May 2026.
Recent Transactions
5Every recent SEC Form 4 transaction Sheila C. Cheston has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Sheila C. Cheston go back to 2024: 4 primary Form 4 filings, an average of 1.3 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Sector
No other insider has filed at Sheila C. Cheston's companies, so these are insiders reporting open-market trades at other companies in the same sector.
- Marc L. Andreessen - $106.20M of IOT open-market activity in the last 12 months
- Gary E. Dickerson - $104.79M of AMAT open-market activity in the last 12 months
- Tony Xu - $103.03M of DASH open-market activity in the last 12 months
- Bessemer Venture Partners VIII L.P. - $102.90M of TTAN open-market activity in the last 12 months
- Shyam Sankar - $102.03M of PLTR open-market activity in the last 12 months
- James Fu Bin Lu - $101.59M of GRND 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 Sheila C. Cheston?
Sheila C. Cheston is a corporate insider, tracked as Director of Digimarc CORP (DMRC). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Sheila C. Cheston last file a Form 4?
The most recent primary Form 4 on record is dated 1 May 2026, one of 4 filings going back to 2024.
Where can I see all of Sheila C. Cheston'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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