144 0001788635 XXXXXXXX LIVE 0001090012 DEVON ENERGY CORP/DE 001-32318 THREE MEMORIAL CITY PLAZA 840 GESSNER ROAD, SUITE 1400 HOUSTON TX 77024 4055523333 Cashion Tana K Former Officer Common Fidelity Brokerage Services LLC

900 Salem Street Smithfield RI 02917

35780 1538092.54 621400000 07/28/2026 NYSE Common 02/10/2024 Restricted Stock Vesting Issuer N 15633 02/10/2024 Compensation Common 02/10/2025 Restricted Stock Vesting Issuer N 10823 02/10/2025 Compensation Common 02/10/2026 Restricted Stock Vesting Issuer N 9324 02/10/2026 Compensation N Tana K. Cashion

333 West Sheridan Avenue Oklahoma City OK 73102-5015

Common 06/18/2026 33724 1418553.05 07/28/2026 /s/ Jared Cook, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Tana K. Cashion