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

Role: Secretary & General Counsel
Signature: /s/ Christopher A. Koster
Issuer symbol: CNC
Transactions as of: 15 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 17 Mar 2026, 17:43:41 UTC
Previous filing: 06 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
KOSTER CHRISTOPHER	Secretary & General Counsel	7700 FORSYTH BOULEVARD, ST. LOUIS	/s/ Christopher A. Koster	17 Mar 2026	0001802501

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CNC	Common Stock	Tax liability		-9,087	-2.5%	$34.45^*	352,836	15 Mar 2026	Direct	F1, F2
holding	CNC	Common Stock						100	15 Mar 2026	By Spouse

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
holding	CNC	Common Stock Option (right to buy)						15,690	15 Mar 2026	Common Stock	15,690	$81.85	Direct	F3
holding	CNC	Phantom Stock						3,016	15 Mar 2026	Common Stock	3,016	$0.000000	Direct	F4, F5

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Shares withheld for taxes upon vesting of previously-reported grants of restricted stock units.
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.
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.
F4	Each share of phantom stock represents the right to receive the fair market value of one share of Centene common stock.
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.