Summary
Updated Aug 31, 2026
Thomas J. Riga is COO and CCO of CHIMERIX INC (CMRX). 1 SEC Form 4 filing on record, dated 21 April 2025.
Recent Transactions
1Every recent SEC Form 4 transaction Thomas J. Riga has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Thomas J. Riga go back to 2025: 1 primary Form 4 filing, an average of 0.5 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 Thomas J. Riga's companies, so these are insiders reporting open-market trades at other companies in the same sector.
- Mayukh Sukhatme - $109.13M of ROIV open-market activity in the last 12 months
- Michael Simanovsky - $105.88M of SNDA open-market activity in the last 12 months
- Eric Venker - $103.97M of ROIV open-market activity in the last 12 months
- Bruce Booth - $100.59M of KYMR open-market activity in the last 12 months
- Paul A. Mahon - $99.65M of UTHR open-market activity in the last 12 months
- ADAR1 Capital Management, LLC - $95.66M of KROS 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 Thomas J. Riga?
Thomas J. Riga is a corporate insider, tracked as COO and CCO of CHIMERIX INC (CMRX). InsiderAlpha holds 1 primary Form 4 filing for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Thomas J. Riga last file a Form 4?
The only primary Form 4 on record is dated 21 April 2025.
Where can I see all of Thomas J. Riga'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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