X0306 4 2022-02-22 0001090012 DEVON ENERGY CORP/DE DVN 0001595720 CAMERON DENNIS C 333 W SHERIDAN AVE OKLAHOMA CITY OK 73102 1 EVP and General Counsel Common Stock 2022-02-22 4 M 0 4592 35.16 A 327275 D Common Stock 2022-02-22 4 M 0 4034 27.90 A 331309 D Common Stock 2022-02-22 4 S 0 4592 53.80 D 326717 D Common Stock 2022-02-22 4 S 0 4034 53.55 D 322683 D Non-qualified Stock Option (Right to Buy) 35.16 2022-02-22 4 M 0 4592 0 D 2013-02-28 2022-02-28 Common Stock 4592 0 D Non-qualified Stock Option (Right to Buy) 27.90 2022-02-22 4 M 0 4034 0 D 2014-03-04 2023-03-04 Common Stock 4034 0 D The price reported in Column 4 is a weighted average price. These shares were sold in two transactions at prices of $53.55 and $53.56. The reporting person undertakes to provide to Devon Energy Corporation, any security holder of Devon Energy Corporation or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. The stock options vested in one-third increments on February 28 of 2013, 2014 and 2015. The stock options vested in one-third increments on March 4 of 2014, 2015 and 2016. /s/ Edward T. Highberger, Attorney-in-Fact for Dennis C. Cameron 2022-02-23