Centene counsel sells 56,500 at $66.90–$66.91

CENTENE CORP (CNC) insider Christopher Koster, Secretary & General Counsel, reported selling 56,500 shares of common stock on 2026-08-26 in an open-market or private transaction at a weighted average price between $66.90 and $66.91.

Rhea-AI Filing Summary

CENTENE CORP (CNC) insider Christopher Koster, Secretary & General Counsel, reported selling 56,500 shares of common stock on 2026-08-26 in an open-market or private transaction at a weighted average price between $66.90 and $66.91. After this sale, he directly holds 248,853.991 shares, including 229,874 restricted stock units and performance stock units reported at target performance and subject to vesting requirements. He also reports 100 shares of indirect ownership held by his spouse. The transactions were not affirmed as being under a Rule 10b5-1 trading plan.

Insider Trade Summary

Net Seller: 56,500 shares

Net Sell 2 txns

Insider KOSTER CHRISTOPHER

Role Secretary & General Counsel

Sold 56,500 shs ($3.78M)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2	56,500	$66.90	$3.78M
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 248,853.991 shares (Direct); Common Stock — 100 shares (Indirect, By Spouse)

Footnotes (2)

1. F1. The weighted average price for this transaction is reported within the form. Shares were sold at prices ranging from $66.90 to $66.91. Full information regarding the number of shares at each price is available upon request.
2. 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.

Key Figures

Shares sold: 56,500 shares Sale price range: $66.90–$66.91 per share Direct holdings after transaction: 248,853.991 shares +3 more

6 metrics

Shares sold 56,500 shares Common stock sale on 2026-08-26

Sale price range $66.90–$66.91 per share Weighted average price range for the 56,500-share sale

Direct holdings after transaction 248,853.991 shares Direct common stock owned following the 2026-08-26 sale

RSUs and PSUs included in ownership 229,874 shares Previously granted restricted stock units and performance stock units at target performance, subject to vesting

Indirect holdings by spouse 100 shares Indirect ownership noted as "By Spouse"

Net shares sold 56,500 shares Net-buy/sell direction summarized as net-sell in transaction summary

Key Terms

weighted average price, restricted stock units, performance stock units, indirect ownership

4 terms

weighted average price financial

"The weighted average price for this transaction is reported"

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

restricted stock units financial

"Ownership includes 229,874 shares of previously-granted restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

performance stock units financial

"and performance stock units (reported at target level performance)"

Performance stock units are a type of company award that grants employees shares of stock only if certain performance goals are met. They motivate employees to work toward specific company achievements, aligning their interests with those of shareholders. For investors, they can influence a company's future stock supply and reflect management’s confidence in reaching key targets.

indirect ownership financial

"total_shares_following_transaction": "100.0000", "direct_or_indirect": "I""

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did CNC’s Christopher Koster report?

Christopher Koster reported a sale of 56,500 shares of CENTENE CORP common stock on 2026-08-26 in a transaction coded as a sale in the open market or a private transaction.

At what price did Christopher Koster sell CNC shares?

The filing reports a weighted average price, with shares sold at prices ranging from $66.90 to $66.91. Detailed breakdowns by individual price level are available from the reporting person upon request.

How many CNC shares does Christopher Koster hold after this transaction?

After the reported sale, Christopher Koster directly holds 248,853.991 shares of CENTENE CORP common stock. This direct ownership includes 229,874 restricted stock units and performance stock units subject to vesting requirements.

How many CNC shares are held as RSUs or PSUs by Christopher Koster?

His reported ownership includes 229,874 shares in the form of previously granted restricted stock units and performance stock units, which are reported at target performance and remain subject to vesting conditions.

Does Christopher Koster have any indirect ownership of CNC stock?

Yes. The Form 4 shows an indirect holding of 100 shares of CENTENE CORP common stock, noted as being held "By Spouse".

Was Christopher Koster’s CNC share sale under a Rule 10b5-1 trading plan?

No. The filing’s Rule 10b5-1 checkbox is not checked, and there is no footnote indicating that the reported sale was executed pursuant to a Rule 10b5-1 trading plan.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/27/2026 - 04:45 PM EDT Accepted by SEC EDGAR 08/27/2026 - 04:45 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

KOSTER CHRISTOPHER

(Last) (First) (Middle)

7700 FORSYTH BOULEVARD

(Street)

ST. LOUIS MISSOURI 63105

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
CENTENE CORP [ CNC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Secretary & General Counsel

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/26/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/26/2026		S		56,500	D	$66.9(1)	248,853.991(2)	D
Common Stock								100	I	By Spouse

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The weighted average price for this transaction is reported within the form. Shares were sold at prices ranging from $66.90 to $66.91. Full information regarding the number of shares at each price is available upon request.

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

Remarks:

	/s/ Christopher A. Koster	08/27/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)