Centene counsel sells 47,603 shares in open trade

Rhea-AI Filing Summary

CENTENE CORP (CNC) reported that officer Christopher Koster, Secretary & General Counsel, sold 47,603 shares of common stock on 2026-08-18 in an open-market transaction at a weighted average price of $65.36 per share, with individual sale prices ranging from $65.28 to $65.45. Following this sale, his reported direct ownership is 305,353.991 shares, which includes common stock acquired through the company’s Employee Stock Purchase Program and 229,874 shares of previously granted restricted stock units and performance stock units at target performance, all subject to vesting requirements. An additional 100 shares are reported as indirectly owned by his spouse.

Insider Trade Summary

Net Seller: 47,603 shares

Net Sell 2 txns

Insider KOSTER CHRISTOPHER

Role Secretary & General Counsel

Sold 47,603 shs ($3.11M)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2, F3	47,603	$65.36	$3.11M
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 305,353.991 shares (Direct); Common Stock — 100 shares (Indirect, By Spouse)

Footnotes (3)

1. F1. The weighted average price for this transaction is reported within the form. Shares were sold at prices ranging from $65.28 to $65.45. Full information regarding the number of shares at each price is available upon request.
2. F2. Updated ownership includes common stock acquired through the Company's Employee Stock Purchase Program.
3. F3. 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: 47,603 shares Weighted average sale price: $65.36 per share Sale price range: $65.28–$65.45 per share +3 more

6 metrics

Shares sold 47,603 shares Common stock sold by Christopher Koster on 2026-08-18

Weighted average sale price $65.36 per share Weighted average price for the 2026-08-18 sale

Sale price range $65.28–$65.45 per share Range of individual prices for the reported sale

Direct holdings after transaction 305,353.991 shares Direct CNC common stock ownership reported after the sale

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

Indirect spouse holdings 100 shares CNC common stock reported as indirectly owned by spouse

Key Terms

weighted average price, Employee Stock Purchase Program, restricted stock units, performance stock units

4 terms

weighted average price financial

"The weighted average price for this transaction is reported within the form."

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.

Employee Stock Purchase Program financial

"Updated ownership includes common stock acquired through the Company's Employee Stock Purchase Program."

restricted stock units financial

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

"restricted stock units 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.

FAQ

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

What insider transaction did CENTENE CORP (CNC) report for Christopher Koster?

CENTENE CORP reported that Christopher Koster sold 47,603 shares of common stock on 2026-08-18. The sale was reported as an open-market transaction at a weighted average price of $65.36 per share.

At what prices were the CNC shares sold by Christopher Koster?

The reported weighted average price for the sale was $65.36 per CNC share. According to the disclosure, individual transaction prices ranged from $65.28 to $65.45 per share.

How many CENTENE (CNC) shares does Christopher Koster hold after this sale?

After the sale, Christopher Koster’s reported direct ownership is 305,353.991 CNC common shares. This figure includes shares acquired through the Employee Stock Purchase Program and certain unvested restricted and performance stock units.

How many restricted and performance stock units does Christopher Koster have at CENTENE (CNC)?

The filing states that his ownership includes 229,874 shares represented by previously granted restricted stock units and performance stock units. These awards are reported at target performance and remain subject to vesting requirements.

Does Christopher Koster report any indirect ownership of CENTENE (CNC) shares?

Yes. In addition to his direct holdings, the filing reports 100 CNC common shares held as indirect ownership "By Spouse". This line is shown separately from his directly held shares.

Was the CENTENE (CNC) insider sale under a Rule 10b5-1 trading plan?

The document-level indicator for Rule 10b5-1 trading plans is marked false. This means the filing does not classify the reported sale as made pursuant to an affirmed Rule 10b5-1 plan.

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

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Accepted by SEC EDGAR 08/19/2026 - 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)
08/18/2026

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	08/18/2026		S		47,603	D	$65.36(1)	305,353.991(2)(3)	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 $65.28 to $65.45. Full information regarding the number of shares at each price is available upon request.

2. Updated ownership includes common stock acquired through the Company's Employee Stock Purchase Program.

3. 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	08/19/2026
	** 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)