| Delaware | 42-1406317 | 
| (State or other jurisdiction of incorporation or organization) | (I.R.S. Employer Identification No.) | 
| 7700 Forsyth Boulevard St. Louis, Missouri | 63105 | 
| (Address of Principal Executive Offices) | (Zip Code) | 
| Large Accelerated Filer ☒ | Accelerated filer   | ☐ | 
| Non-accelerated filer     ☐ | Smaller reporting company   | ☐ | 
| Emerging growth company   | ☐ | 
| Title of securities to be registered | Amount to be registered (1) | Proposed maximum offering price per share (2) | Proposed maximum aggregate offering price (2) | Amount of registration fee | ||||||||||
| Common Stock, $0.001 par value per share | 3,702,095 | $83.255 | $308,217,919.23 | $28,571.80 | 
| (1) | Includes (i) 2,259,315 shares of the Registrant’s common stock, $0.001 par value per share (“Common Stock”), reserved for issuance under the Centene Corporation 2012 Stock Incentive Plan, as amended, (ii) 1,233,825 shares of Common Stock
                issuable upon the exercise or vesting, as applicable, of assumed options to acquire shares of Magellan Health, Inc. (“Magellan”) common stock (“Options”), assumed Magellan performance-vested restricted stock units (“PSUs”), assumed awards
                of restricted shares of Magellan common stock (“RSAs”) and assumed Magellan time-vested restricted stock units (“RSUs”) under the Magellan Health, Inc. 2016 Management Incentive Plan and (iii) 208,955 shares of Common Stock issuable upon
                the exercise or vesting, as applicable, of assumed Options, PSUs, RSAs and RSUs under the Magellan Health Services, Inc. 2011 Management Incentive Plan. | 
| (2) | Estimated solely for the purpose of determining the registration fee in accordance with Rule 457(c) and 457(h) under the Securities Act based on the average of the high and low sale prices of the Registrant’s Common Stock as reported on
                the New York Stock Exchange on December 31, 2021. | 
| Item 3. | Incorporation of Documents by Reference. | 
|  | (a) | Annual Report on Form 10-K for the year ended December 31, 2020, filed with the SEC on February 22, 2021. | 
| (b) | Quarterly Report on Form 10-Q for the periods ended March 31, 2021, June 30, 2021, and September 30, 2021, filed with the SEC on April
                      27, 2021, July 27, 2021, and October 26, 2021, respectively. | 
| (c) | Current Reports on Form 8-K filed with the SEC on January 4, 2021, February 8, 2021, February 10, 2021, February 11, 2021, February 17, 2021, February 18, 2021, March
                      11, 2021, March 19, 2021, April 30, 2021, May 7,
                      2021, June 14, 2021, June 25, 2021, July
                      1, 2021, July 15, 2021, July 30, 2021, August
                      12, 2021, August 18, 2021, September 7, 2021, September
                      27, 2021, October 8, 2021, October 29, 2021 and December 14, 2021. | 
| (d) | The description of the Registrant’s common stock contained in its registration statement on Form 8-A filed with the SEC on October 14, 2003, as updated by Exhibit 4.1 to the Registrant’s Annual Report on Form 10-K for the year ended
                    December 31, 2019, filed with the SEC on February 18, 2020, including any amendments or reports filed for the purpose of
                    updating such description. | 
| Item 4. | Description of Securities | 
| Item 5. | Interests of Named Experts and Counsel. | 
| Item 6. | Indemnification of Directors and Officers. | 
| Item 7. | Exemption from Registration Claimed. | 
| Item 8. | Exhibits. | 
| Exhibit Number | Description | |
| Amended and Restated Certificate of Incorporation of Centene Corporation (incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K filed with the SEC on April 30, 2021). | ||
| Amended and Restated By-laws of Centene Corporation, as amended effective December 14, 2021 (incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K filed with the SEC on December 14, 2021). | ||
| Centene Corporation 2012 Stock Incentive Plan, as amended (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed with the SEC on April 30, 2021). | ||
| Magellan Health, Inc. 2016 Management Incentive Plan, effective as of May 18, 2016 (incorporated by reference to Appendix A to Magellan Health, Inc.’s Definitive Proxy Statement, which was filed on April 8, 2016). | ||
| Magellan Health Services, Inc. 2011 Management Incentive Plan, effective as of May 18, 2011 (incorporated by reference to Appendix A to Magellan Health, Inc.’s Definitive Proxy Statement, which was filed on April 8, 2011). | ||
| Opinion of Counsel.* | ||
| Consent of KPMG LLP, independent registered public accounting firm of Centene Corporation.* | ||
| Consent of Counsel (included in Exhibit 5.1).* | ||
| Power of Attorney (included on signature page).* | 
| Item 9. | Undertakings. | 
| (a) | The undersigned Registrant hereby undertakes; | 
|  | (1) | To file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement: | 
|  | (i) | To include any prospectus required by Section 10(a)(3) of the Securities Act; | 
| (ii) | To reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate,
                  represent a fundamental change in the information set forth in this registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not
                  exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the SEC pursuant to Rule 424(b) if, in the aggregate, the changes
                  in volume and price represent no more than 20 percent change in the maximum aggregate offering price set forth in the “Calculation of Registration Fee” table in the effective registration statement; and | 
| (iii) | To include any material information with respect to the plan of distribution not previously disclosed in this registration statement or any material change to such information in the registration statement; | 
|  | (2) | That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein,
                  and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof; and | 
|  | (3) | To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering. | 
| (b) | The undersigned Registrant hereby further undertakes that, for purposes of determining any liability under the Securities Act, each filing of the Registrant’s annual report pursuant to Section 13(a) or
                  Section 15(d) of the Exchange Act and, where applicable, each filing of the Plan’s annual report pursuant to Section 15(d) under the Exchange Act, that is incorporated by reference in this Registration Statement shall be deemed to be a
                  new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. | 
| (c) | Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the Registrant pursuant to the foregoing provisions, or
                  otherwise, the Registrant has been advised that in the opinion of the SEC such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification
                  against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding) is asserted by
                  such director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of
                  appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue. | 
| CENTENE CORPORATION | ||
| By: | /s/ Michael F. Neidorff | |
| Michael F. Neidorff Chairman and Chief Executive Officer | ||
| Signature | Title | Date | 
| /s/ Michael F. Neidorff | Chairman and Chief Executive Officer | January 4, 2022 | 
| Michael F. Neidorff | (Principal Executive Officer) | |
| /s/ Andrew L. Asher | Executive Vice President and Chief Financial Officer | January 4, 2022 | 
| Andrew L. Asher | (Principal Financial Officer) | |
| /s/ Katie N. Casso | Senior Vice President, Corporate Controller and Chief Accounting Officer | January 4, 2022 | 
| Katie N. Casso | (Principal Accounting Officer) | |
| /s/ Orlando Ayala | Director | January 4, 2022 | 
| Orlando Ayala | ||
| /s/ Jessica L. Blume | Director | January 4, 2022 | 
| Jessica L. Blume | ||
| /s/ H. James Dallas | Director | January 4, 2022 | 
| H. James Dallas | ||
| /s/ Robert K. Ditmore | Director | January 4, 2022 | 
| Robert K. Ditmore | 
| /s/ Frederick H. Eppinger | Director | January 4, 2022 | 
| Frederick H. Eppinger | ||
| /s/ Richard A. Gephardt | Director | January 4, 2022 | 
| Richard A. Gephardt | ||
| /s/ Sarah M. London | Director | January 4, 2022 | 
| Sarah M. London | ||
| /s/ John R. Roberts | Director | January 4, 2022 | 
| John R. Roberts | ||
| /s/ Lori J. Robinson | Director | January 4, 2022 | 
| Lori J. Robinson | ||
| /s/ Tommy G. Thompson | Director | January 4, 2022 | 
| Tommy G. Thompson | ||
| /s/ William L. Trubeck | Director | January 4, 2022 | 
| William L. Trubeck |