Christopher Koster

CIK: 0001802501

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)2 (22.2%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)2 (22.2%)

Compensation grants

Other (G, F, J, C, D, …)5 (55.6%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

CNC

CENTENE CORP

Officer

Discretionary Trading P&L

Holdings

Transaction History (9 total)

CNC
CENTENE CORP
Aug 26, 2026
Sale(S)
Direct
56.5K shares at avg. $66.90$3.8M
CNC
CENTENE CORP
Aug 18, 2026
Sale(S)
Direct
47.6K shares at avg. $65.36$3.1M
CNC
CENTENE CORP
Mar 15, 2026
Tax Payment(F)
Direct
9.1K shares at avg. $34.45$313K
CNC
CENTENE CORP
Jan 26, 2026
Award(A)
Direct
126.9K shares-
CNC
CENTENE CORP
Mar 15, 2025
Tax Payment(F)
Direct
4K shares at avg. $58.19$235K
CNC
CENTENE CORP
Mar 15, 2025
Award(A)
Direct
85.9K shares-
CNC
CENTENE CORP
Feb 4, 2025
Disposition(D)
Direct
10.7K shares-
CNC
CENTENE CORP
Feb 4, 2025
Tax Payment(F)
Direct
3.9K shares at avg. $64.82$250K
CNC
CENTENE CORP
Dec 15, 2024
Tax Payment(F)
Direct
2.5K shares at avg. $59.42$150K

		Type	Shares	Price		Ownership
Aug 26, 2026	CNC CENTENE CORP	Sale(S)	56,500	$66.90	$3,779,850	Direct
Aug 18, 2026	CNC CENTENE CORP	Sale(S)	47,603	$65.36	$3,111,332	Direct
Mar 15, 2026	CNC CENTENE CORP	Tax Payment(F)	9,087	$34.45	$313,047	Direct
Jan 26, 2026	CNC CENTENE CORP	Award(A)	126,925	-	$0	Direct
Mar 15, 2025	CNC CENTENE CORP	Tax Payment(F)	4,039	$58.19	$235,029	Direct
Mar 15, 2025	CNC CENTENE CORP	Award(A)	85,925	-	-	Direct
Feb 4, 2025	CNC CENTENE CORP	Disposition(D)	10,661	-	-	Direct
Feb 4, 2025	CNC CENTENE CORP	Tax Payment(F)	3,852	$64.82	$249,687	Direct
Dec 15, 2024	CNC CENTENE CORP	Tax Payment(F)	2,518	$59.42	$149,620	Direct

1-9 of 9 transactions

About KOSTER CHRISTOPHER

KOSTER CHRISTOPHER (SEC CIK 0001802501) files insider reports with the SEC as Secretary & General Counsel of CENTENE CORP (CNC).

Signal8 holds 8 ownership filings by KOSTER CHRISTOPHER, all Form 4s, filed between Dec 17, 2024 and Aug 27, 2026. Those filings report 9 transactions, from Dec 15, 2024 to Aug 26, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on KOSTER CHRISTOPHER's filings is in ST. LOUIS, MO.

Recent filings by KOSTER CHRISTOPHER

Aug 26, 2026: Open-market sale of CNC shares (Form 4, code S).
Aug 18, 2026: Open-market sale of CNC shares (Form 4, code S).
Mar 15, 2026: Tax withholding of CNC shares (Form 4, code F).
Jan 26, 2026: Grant or award of CNC shares (Form 4, code A).
Mar 15, 2025: Tax withholding of CNC shares (Form 4, code F).

Other insiders filing for CENTENE CORP (CNC)

Carson Michael A, Group President, Medicare&Spec
Tyler Lauren M, Director
TANJI KENNETH, Director
Samuels Theodore R. II, Director
EPPINGER FREDERICK H, Director
COUGHLIN CHRISTOPHER J, Director

How to read Form 4 transaction codes