Centene (CNC) executive reports routine tax withholding of shares

Rhea-AI Filing Summary

Centene Corp’s Corporate Controller and Chief Accounting Officer, Katie Casso, reported a routine tax-withholding transaction related to equity compensation. On March 15, 2026, 3,359 shares of common stock were withheld at $34.45 per share to cover taxes when previously granted restricted stock units vested. This was not an open-market sale. After the withholding, she directly owns 109,776 shares of common stock, and a footnote states her ownership also includes 71,740 unvested restricted and performance stock units reported at target performance.

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

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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^*

CASSO KATIE

(Last) (First) (Middle)

7700 FORSYTH BOULEVARD

(Street)

ST. LOUIS MO 63105

(City) (State) (Zip)

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)
	Corporate Controller & CAO

3. Date of Earliest Transaction (Month/Day/Year)
03/15/2026

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

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

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

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	03/15/2026		F		3,359(1)	D	$34.45	109,776(2)	D

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

2. Ownership includes 71,740 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 (executed by attorney-in-fact)	03/17/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What insider transaction did Centene Corp (CNC) report for Katie Casso?

Centene reported that Katie Casso had 3,359 common shares withheld to cover taxes on vesting restricted stock units. This Form 4 event reflects compensation-related tax withholding, not an open-market stock sale or new purchase of Centene shares.

Was the Centene Corp (CNC) Form 4 transaction an open-market sale?

No, the Form 4 shows a tax-withholding disposition, not an open-market sale. Shares were withheld by Centene to satisfy tax obligations upon vesting of previously reported restricted stock units granted to executive Katie Casso.

How many Centene (CNC) shares does Katie Casso hold after this Form 4?

After the tax-withholding transaction, Katie Casso directly holds 109,776 Centene common shares. A footnote also notes 71,740 additional unvested restricted and performance stock units that remain subject to future vesting requirements and are reported at target performance.

What does the F transaction code mean in Centene’s (CNC) Form 4?

The F code indicates shares were used to pay taxes or an exercise price. In this Centene filing, 3,359 shares were withheld to cover tax liabilities when previously granted restricted stock units vested for executive Katie Casso.

How large is the tax-withholding transaction in Centene’s (CNC) Form 4?

The filing reports 3,359 shares of Centene common stock withheld for taxes at a value of $34.45 per share. This reduced Katie Casso’s immediately held shares, while leaving a substantial remaining equity position and unvested stock units outstanding.