UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. __)* Devon Energy Corporation ------------------------------------------------------------------------------ (NAME OF ISSUER) Common Stock, par value $.10 per share ----------------------------------------------------------------------------- (TITLE OF CLASS OF SECURITIES) 25179M103 ------------------------------------------------------------------------------ (CUSIP NUMBER) December 31, 2002 ----------------------------------------------------------------------------- (DATE OF EVENT WHICH REQUIRES FILING OF THIS STATEMENT) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: / / Rule 13d-1(b) /X/ Rule 13d-1(c) / / Rule 13d-1(d) *The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page. The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). 1 of 9 CUSIP No.25179M103 13G Page 2 of 9 Pages ________________________________________________________________________________ 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Kerr-McGee Corporation ________________________________________________________________________________ 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [_] ________________________________________________________________________________ 3. SEC USE ONLY ________________________________________________________________________________ 4. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware ________________________________________________________________________________ NUMBER OF 5. SOLE VOTING POWER SHARES 9,954,000 _________________________________________________________________ BENEFICIALLY 6. SHARED VOTING POWER OWNED BY 0 _________________________________________________________________ EACH 7. SOLE DISPOSITIVE POWER REPORTING 9,954,000 _________________________________________________________________ PERSON 8. SHARED DISPOSITIVE POWER WITH 0 ________________________________________________________________________________ 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 9,954,000 ________________________________________________________________________________ 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [_] ________________________________________________________________________________ 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 6.4% (Based on 156,666,000 shares outstanding as set forth in the Issuer's 10-Q for the quarterly period ended September 30, 2002) ________________________________________________________________________________ 12. TYPE OF REPORTING PERSON* HC ________________________________________________________________________________ *SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No.25179M103 13G Page 3 of 9 Pages ________________________________________________________________________________ 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Kerr-McGee Worldwide Corporation ________________________________________________________________________________ 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [_] ________________________________________________________________________________ 3. SEC USE ONLY ________________________________________________________________________________ 4. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware ________________________________________________________________________________ NUMBER OF 5. SOLE VOTING POWER SHARES 9,954,000 _________________________________________________________________ BENEFICIALLY 6. SHARED VOTING POWER OWNED BY 0 _________________________________________________________________ EACH 7. SOLE DISPOSITIVE POWER REPORTING 9,954,000 _________________________________________________________________ PERSON 8. SHARED DISPOSITIVE POWER WITH 0 ________________________________________________________________________________ 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 9,954,000 ________________________________________________________________________________ 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [_] ________________________________________________________________________________ 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 6.4% (Based on 156,666,000 shares outstanding as set forth in the Issuer's 10-Q for the quarterly period ended September 30, 2002) ________________________________________________________________________________ 12. TYPE OF REPORTING PERSON* CO ________________________________________________________________________________ *SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No.25179M103 13G Page 4 of 9 Pages ________________________________________________________________________________ 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Kerr-McGee Oil & Gas Corporation ________________________________________________________________________________ 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [_] ________________________________________________________________________________ 3. SEC USE ONLY ________________________________________________________________________________ 4. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware ________________________________________________________________________________ NUMBER OF 5. SOLE VOTING POWER SHARES 9,954,000 _________________________________________________________________ BENEFICIALLY 6. SHARED VOTING POWER OWNED BY 0 _________________________________________________________________ EACH 7. SOLE DISPOSITIVE POWER REPORTING 9,954,000 _________________________________________________________________ PERSON 8. SHARED DISPOSITIVE POWER WITH 0 ________________________________________________________________________________ 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 9,954,000 ________________________________________________________________________________ 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [_] ________________________________________________________________________________ 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 6.4% (Based on 156,666,000 shares outstanding as set forth in the Issuer's 10-Q for the quarterly period ended September 30, 2002) ________________________________________________________________________________ 12. TYPE OF REPORTING PERSON* CO ________________________________________________________________________________ *SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No.25179M103 13G Page 5 of 9 Pages ________________________________________________________________________________ 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Kerr-McGee Chemical Worldwide LLC (as successor to Kerr-McGee Operating Corporation) ________________________________________________________________________________ 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [_] ________________________________________________________________________________ 3. SEC USE ONLY ________________________________________________________________________________ 4. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware ________________________________________________________________________________ NUMBER OF 5. SOLE VOTING POWER SHARES 0 _________________________________________________________________ BENEFICIALLY 6. SHARED VOTING POWER OWNED BY 0 _________________________________________________________________ EACH 7. SOLE DISPOSITIVE POWER REPORTING 0 _________________________________________________________________ PERSON 8. SHARED DISPOSITIVE POWER WITH 0 ________________________________________________________________________________ 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 ________________________________________________________________________________ 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [_] ________________________________________________________________________________ 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0 ________________________________________________________________________________ 12. TYPE OF REPORTING PERSON* OO ________________________________________________________________________________ *SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No.25179M103 13G Page 6 of 9 Pages ITEM 1. (a) NAME OF ISSUER Devon Energy Corporation (formerly known as Devon Delaware Corporation) (b) Address of Issuer's Principal Executive Offices 20 N. Broadway, Suite 1500 Oklahoma City, Oklahoma 73102 ITEM 2. (a) NAME OF PERSON FILING Kerr-McGee Corporation, Kerr-McGee Worldwide Corporation, Kerr-McGee Oil & Gas Corporation and Kerr-McGee Chemical Worldwide LLC (as successor to Kerr-McGee Operating Corporation) (b) ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE: 123 Robert S. Kerr Avenue Oklahoma City, Oklahoma 73102 (c) CITIZENSHIP Kerr-McGee Corporation, Kerr-McGee Worldwide Corporation, Kerr-McGee Oil & Gas Corporation and Kerr-McGee Chemical Worldwide LLC were organized or formed and exist under the laws of the State of Delaware (d) TITLE OF CLASS OF SECURITIES Common Stock, par value $.10 per share (e) CUSIP NUMBER 25179M103 ITEM 3. If this statement is filed pursuant to Rules 13d-1(b), or 13-2(b) or (c), check whether the person filing is a: (a) / / Broker or dealer registered under Section 15 of the Act. (b) / / Bank as defined in section 3(a)(6) of the Act. (c) / / Insurance company as defined in Section 3(a)(19) of the Act. (d) / / Investment company registered under Section 8 of the Investment Company Act. (e) / / An investment adviser in accordance with Rule 13d-1(b)(1)(ii) (f) / / An employee benefit plan or endowment fund in accordance with 13d-1(b)(1)(ii)(F). (g) / / A parent holding company or control person in accordance with 13d-1(b)(1)(ii)(G). CUSIP No.25179M103 13G Page 7 of 9 Pages (h) / / A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act. (i) / / A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act. (j) / / Group, in accordance with 13d-1(b)(1)(ii)(J). ITEM 4. OWNERSHIP Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1. (In each case, other than with respect to Kerr-McGee Chemical Worldwide LLC.) (a) Amount beneficially owned: 9,954,000 (b) Percent of class: 6.4% (c) Number of shares as to which the person has: (i) Sole power to vote or to direct the vote: 9,954,000 (ii) Shared power to vote or to direct the vote: 0 (iii) Sole power to dispose or to direct the disposition of: 9,954,000 (iv) Shared power to dispose or to direct the disposition of: 0 ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following [X]. The former Kerr-McGee Operating Corporation ("KMOC"), a wholly owned subsidiary of Kerr-McGee Corporation, owned 9,954,000 shares of the common stock of the Issuer (the "Shares"). On December 31, 2002, KMOC distributed the Shares to its direct and wholly-owned subsidiary, Kerr-McGee Oil & Gas Corporation ("KMOGC"). On the same date KMOC contributed all of the stock of KMOGC to KMOC's new direct parent, Kerr-McGee Worldwide Corporation, and accordingly no longer beneficially owned any of the Shares. Subsequently, KMOC merged with and was succeeded by Kerr-McGee Chemical Worldwide LLC. CUSIP No.25179M103 13G Page 8 of 9 Pages ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON Not Applicable. ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY Kerr-McGee Oil & Gas Corporation (a direct, wholly-owned subsidiary of Kerr-McGee Worldwide Corporation and an indirect, wholly-owned subsidiary of Kerr-McGee Corporation) ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP Not Applicable. ITEM 9. NOTICE OF DISSOLUTION OF GROUP Not Applicable. ITEM 10. CERTIFICATIONS By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. CUSIP No.25179M103 13G Page 9 of 9 Pages SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Date: January 3, 2003 KERR-MCGEE CORPORATION By: /s/ John F. Reichenberger -------------------------------- Name: John F. Reichenberger Title: Vice President, Assistant Secretary and Deputy General Counsel KERR-MCGEE WORLDWIDE CORPORATION By: /s/ John F. Reichenberger ------------------------------- Name: John F. Reichenberger Title: Vice President and Assistant Secretary KERR-MCGEE OIL & GAS CORPORATION By: /s/ John F. Reichenberger -------------------------------- Name: John F. Reichenberger Title: Vice President KERR-MCGEE CHEMICAL WORLDWIDE LLC By: /s/ John F. Reichenberger -------------------------------- Name: John F. Reichenberger Title: Vice President and Assistant Secretary Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13(d)-7(b) for other parties for whom copies are to be sent. Attention: Intentional misstatements or omissions of fact constitute federal criminal violations (see 18 U.S.C. 1001).