Summary
Updated Aug 31, 2026
Christopher Koster is Secretary & General Counsel of CENTENE CORP (CNC). 6 SEC Form 4 filings on record going back to 2024, most recently on 27 August 2026. Most recent open-market trade: sold $3.78M of CNC on 27 August 2026. Lifetime open-market sales: $6.89M.
Recent Transactions
6Every recent SEC Form 4 transaction Christopher Koster 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 Christopher Koster 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.
- Kenneth A. Burdick - $7.74M of CNC 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 Christopher Koster?
Christopher Koster is a corporate insider, tracked as Secretary & General Counsel of CENTENE CORP (CNC). InsiderAlpha holds 6 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 Christopher Koster submitted recently?
2 primary Form 4 filings in the last 90 days, covering 1 company.
Has Christopher Koster been buying or selling stock?
Recorded transactions: 0 open-market purchases and 2 open-market sales ($6.89M) across all tracked filings.
Where can I see all of Christopher Koster'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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