X0306 4/A 2021-01-07 2021-01-11 0 0001090012 DEVON ENERGY CORP/DE DVN 0001555889 Gaspar Clay M 333 W. SHERIDAN AVE. OKLAHOMA CITY OK 73102 0 1 0 0 EVP and COO Common Stock 2021-01-07 4 A 0 336902 A 336902 D Common Stock 2021-01-07 4 A 0 35845 A 372747 D Common Stock 2021-01-07 4 A 0 67389 A 440136 D Common Stock 2021-01-07 4 A 0 45601 A 485737 D Common Stock 2021-01-07 4 A 0 132059 A 617796 D Common Stock 2021-01-07 4 A 0 141141 A 758937 D Common Stock 2021-01-07 4 A 0 126354 A 885291 D Common Stock 2021-01-07 4 A 0 57001 A 942292 D Pursuant to the terms of the Agreement and Plan of Merger, dated as of September 26, 2020, by and among Devon Energy Corporation ("Devon"), East Merger Sub, Inc. and WPX Energy, Inc. ("WPX") (the "Merger Agreement"), on January 7, 2021 (the "Closing Date"), WPX became a wholly owned subsidiary of Devon. Pursuant to the Merger Agreement, on the Closing Date, each share of WPX Common Stock held by the reporting person was converted automatically into 0.5165 shares of Devon Common Stock. Pursuant to the Merger Agreement, on the Closing Date, each restricted stock award under a WPX benefit plan ("WPX RSA") was converted into 0.5165 shares of Devon Common Stock. The same terms and conditions applicable to WPX RSAs before the conversion will continue to apply. The WPX RSAs granted to the reporting person on March 1, 2019 were converted into 35,845 shares of Devon Common Stock, which will vest in the following increments: 17,922 on March 2, 2021, and 17,923 on March 2, 2022. The WPX RSAs granted to the reporting person on March 2, 2020 were converted into 67,389 shares of Devon Common Stock, which will vest in the following increments: 22,463 on March 2, 2021, 22,463 on March 2, 2022, and 22,463 on March 2, 2023. The WPX RSAs granted to the reporting person on March 9, 2020 were converted into 45,601 shares of Devon Common Stock, which will vest in the following increments: 15,200 on March 9, 2021, 15,200 on March 9, 2022, and 15,201 on March 9, 2023 Pursuant to the Merger Agreement, on the Closing Date, each performance-based WPX restricted stock unit ("WPX RSU") was converted into 0.5165 Devon restricted stock unit ("Devon RSU"), with each Devon RSU representing a contingent right to receive a share of Devon Common Stock. The same terms and conditions applicable to WPX RSUs before the conversion will continue to apply, except for any performance-based vesting conditions. The WPX RSUs granted to the reporting person on March 2, 2018 were converted into 132,059 Devon RSUs, which will vest on March 2, 2021. The WPX RSUs granted to the reporting person on March 1, 2019 were converted into 141,141 Devon RSUs, which will vest on March 2, 2022. The WPX RSUs granted to the reporting person on March 2, 2020 were converted into 126,354 Devon RSUs, which will vest on March 2, 2023. The WPX RSUs granted to the reporting person on March 9, 2020 were converted into 57,001 Devon RSUs, which will vest on March 9, 2023. The Form 4 filed by the reporting person on January 11, 2021 reported the conversion of certain shares of WPX Common Stock previously held by the reporting person into 336,903 shares of Devon Common Stock. The actual number of shares of Devon Common Stock acquired by the reporting person with respect to such shares of WPX Common Stock was 336,902. This Form 4 is being amended to reflect such change in share amount. /s/ Edward T. Highberger, Attorney-in-Fact for Clay M. Gaspar 2021-03-03