Christopher A. Koster - 15 Mar 2026 Form 4 Insider Report for CENTENE CORP (CNC)

Reporting relationship: Secretary & General Counsel
Issuer ticker: CNC
Reported as of: 15 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 17 Mar 2026, 17:43:41 UTC
Prior SEC filing: 06 Feb 2026
Source filing: View source filing
Reporting owner signature: /s/ Christopher A. Koster

Key filing fact

Christopher A. Koster filed Form 4 for CENTENE CORP (CNC) on 17 Mar 2026.

Key facts

This page summarizes Christopher A. Koster's Form 4 filing for CENTENE CORP (CNC).
1 reported transaction and 2 derivative rows are listed below.
Accepted by SEC: 17 Mar 2026, 17:43.

Change

Previous filing in this sequence was filed on 06 Feb 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001802501 Primary reporting owner

KOSTER CHRISTOPHER

Relationship: Secretary & General Counsel
Address: 7700 FORSYTH BOULEVARD, ST. LOUIS
Signature: /s/ Christopher A. Koster
Signature date: 17 Mar 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

CNC transaction

Common Stock

Tax liability

Transaction value
Shares: -9,087
Change %: -2.5%
Price: $34.45^*
Shares after: 352,836
Date: 15 Mar 2026
Ownership: Direct
Footnotes: F1, F2

CNC holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 100
Date: 15 Mar 2026
Ownership: By Spouse

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

CNC holding Derivative

Common Stock Option (right to buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 15,690
Date: 15 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 15,690
Exercise price: $81.85
Footnotes: F3

CNC holding Derivative

Phantom Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 3,016
Date: 15 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 3,016
Exercise price: $0.000000
Footnotes: F4, F5

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

Shares withheld for taxes upon vesting of previously-reported grants of restricted stock units.

Footnote F2

Ownership includes 229,874 shares of previously-granted restricted stock units and performance stock units (reported at target level performance) subject to vesting requirements.

Footnote F3

Performance Stock Option granted on December 15, 2021, may become exercisable on or after the third anniversary of the grant date if the closing price of CNC's common stock equals or exceeds $100 per share for 20 consecutive trading days following the grant date.

Footnote F4

Each share of phantom stock represents the right to receive the fair market value of one share of Centene common stock.

Footnote F5

The phantom stock has no formal expiration date. The phantom stock will be settled in cash or other non-Company securities upon Mr. Koster's termination with the Company or on such other date Mr. Koster may elect.