SEC Form 4 reporting owner

Koster Christopher

Koster Christopher has filed 4 Form 4 transactions reported between January 26, 2026 and August 26, 2026, as Secretary & General Counsel of CENTENE CORP.

Name as filed: KOSTER CHRISTOPHER

Open-market buys, 24 mo

None

reported

Open-market sales, 24 mo

$6.9M

2 lines

Companies

with Form 4 filings

Latest transaction

Aug 26, 2026

transaction date

Roles and reported holdings

CNCCENTENE CORP
Jan 26, 2026 – Aug 26, 2026
Secretary & General Counsel
Held directly248,854 sh as of Aug 26, 2026 · Form 4
24 months: $6.9M sold

Transaction history

All 4 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

Date	Company	Type	Shares	Price	Value	Owned after	Filing
Aug 26, 2026	CNCSecretary & General Counsel	Open-market saleCode S · direct	56,500	$66.90	$3.8M@ $66.90	248,854	Form 4
Aug 18, 2026	CNCSecretary & General Counsel	Open-market saleCode S · direct	47,603	$65.36	$3.1M@ $65.36	305,354	Form 4
Mar 15, 2026	CNCSecretary & General Counsel	Shares withheld for tax or exercise priceCode F · direct	9,087	$34.45	$313K@ $34.45	352,836	Form 4
Jan 26, 2026	CNCSecretary & General Counsel	Grant or awardCode A · direct	126,925	—	—	388,862	Form 4

How this page is built

Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.

Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares owned after the latest purchase, sale, gift or tax-withholding line, shown separately for direct and indirect ownership; an indirect figure is one holding line, not a total across every trust or entity.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.