Exhibit 1 JOINT FILING AGREEMENT Kerr-McGee Corporation, a Delaware corporation, Kerr-McGee Worldwide Corporation, a Delaware corporation, KM Investment Corporation, a Nevada corporation, and Kerr-McGee Chemical Worldwide LLC, a Delaware limited...Joint Filing Agreement • January 13th, 2003 • Kerr McGee Corp /De • Crude petroleum & natural gas
Kerr-McGee Corporation, a Delaware corporation, Kerr-McGee Worldwide Corporation, a Delaware corporation, KM Investment Corporation, a Nevada corporation, and Kerr-McGee Chemical Worldwide LLC, a Delaware limited liability company, each hereby agrees, in accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, that the Amendment No. 1 on Schedule 13G filed herewith, and any amendments thereto, relating to the shares of common stock, par value $0.10, of Devon Energy Corporation is, and will be, jointly filed on behalf of each such person and further agree that this Joint Filing Agreement be included as an exhibit to such joint filings. In evidence thereof, the undersigned hereby execute this Agreement as of the date set forth below.
