Centene officer plans $3.1M stock sale

CENTENE CORP (CNC) received a notice under Rule 144 that officer Christopher A. Koster, through Fidelity Brokerage Services LLC, may sell 47,603 shares of Centene common stock on the NYSE.

Rhea-AI Filing Summary

CENTENE CORP (CNC) received a notice under Rule 144 that officer Christopher A. Koster, through Fidelity Brokerage Services LLC, may sell 47,603 shares of Centene common stock on the NYSE. The filing lists an aggregate market value of $3,111,262.14 for these shares and indicates 493,995,000 shares outstanding as of 08/18/2026. The shares derive from multiple restricted stock vesting events granted as compensation between December 2021 and February 2024.

Key Figures

Shares to be sold: 47,603 shares Aggregate market value: $3,111,262.14 Shares outstanding: 493,995,000 shares +2 more

5 metrics

Shares to be sold 47,603 shares Common stock proposed for sale under Rule 144

Aggregate market value $3,111,262.14 Value of 47,603 shares covered by the notice

Shares outstanding 493,995,000 shares Common shares outstanding as of 08/18/2026

Restricted stock vesting 12/15/2021 12,811 shares Compensation-related restricted stock vesting from issuer

Restricted stock vesting 02/06/2024 16,887 shares Compensation-related restricted stock vesting from issuer

Key Terms

Rule 144, Restricted Stock Vesting, attorney-in-fact

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Vesting financial

"Common | 12/15/2021 | Restricted Stock Vesting | Issuer"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

attorney-in-fact regulatory

"as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

FAQ

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

What does the Form 144 filing disclose for CENTENE CORP (CNC)?

The filing discloses that officer Christopher A. Koster, via Fidelity Brokerage Services LLC, may sell 47,603 shares of Centene common stock under Rule 144 on the NYSE, with an aggregate market value of $3,111,262.14 as of 08/18/2026.

How many CENTENE CORP (CNC) shares are proposed to be sold under this Form 144?

The notice covers a proposed sale of 47,603 shares of Centene common stock. These shares are tied to prior restricted stock vesting compensation awards that vested between December 2021 and February 2024.

What is the reported market value of the CNC shares covered by this Form 144?

The Form 144 lists an aggregate market value of $3,111,262.14 for the 47,603 Centene shares. This figure reflects the value used for the Rule 144 notice as of 08/18/2026, the stated date on the form.

How many CENTENE CORP (CNC) shares are reported as outstanding in this Form 144?

The filing reports 493,995,000 shares outstanding of Centene common stock as of 08/18/2026. This number provides context for the relative size of the 47,603-share proposed sale under Rule 144.

Who is selling the CNC shares and what is their relationship to CENTENE CORP?

The proposed sale is for the account of Christopher A. Koster, identified as an officer of Centene Corp. Fidelity Brokerage Services LLC is listed as the broker, acting under a power of attorney as attorney-in-fact for Koster.

What is the origin of the CENTENE CORP (CNC) shares listed in this Form 144?

The shares come from multiple Restricted Stock Vesting events granted by the issuer as compensation, with vesting dates including 12/15/2021, 06/23/2022, 12/10/2022, 12/15/2022, 02/07/2023, and 02/06/2024.

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

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Accepted by SEC EDGAR 08/18/2026 - 03:32 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001802501
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	CENTENE CORP
SEC File Number	001-31826
Address of Issuer	7700 FORSYTH BLVD. ST LOUIS MISSOURI 63105
Phone	3147254477
Name of Person for Whose Account the Securities are To Be Sold	KOSTER CHRISTOPHER
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	47603	3111262.14	493995000	08/18/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	12/15/2021	Restricted Stock Vesting	Issuer			12811	12/15/2021	Compensation
Common	06/23/2022	Restricted Stock Vesting	Issuer			2490	06/23/2022	Compensation
Common	12/10/2022	Restricted Stock Vesting	Issuer			1660	12/10/2022	Compensation
Common	12/15/2022	Restricted Stock Vesting	Issuer			6106	12/15/2022	Compensation
Common	02/07/2023	Restricted Stock Vesting	Issuer			7649	02/07/2023	Compensation
Common	02/06/2024	Restricted Stock Vesting	Issuer			16887	02/06/2024	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	08/18/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Jennifer Ruchti, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Christopher A. Koster
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)