The reduction is related to change in federal legislation. In the third quarter of 2025, Devon expects oil production to average 384,000 to 390,000 barrels per day. Capital spending in the third quarter is expected to be approximately $900 million. Additional details of Devon’s forward-looking guidance are available on the company’s website at www.devonenergy.com . 2 CONFERENCE CALL WEBCAST AND SUPPLEMENTAL EARNINGS MATERIALS Also provided with today’s release is the company’s earnings presentation that is available on the company’s website at www.devonenergy.com . The company’s second-quarter conference call will be held at 10:00 a.m. Central (11:00 a.m. Eastern) on Wednesday, August 6, 2025, and will serve primarily as a forum for analyst and investor questions and answers. ABOUT DEVON ENERGY Devon Energy is a leading oil and gas producer in the U.S. with a diversified multi-basin portfolio headlined by a world-class acreage position in the Delaware Basin. Devon’s disciplined cash-return business model is designed to achieve strong returns, generate free cash flow and return capital to shareholders, while focusing on safe and sustainable operations. For more information, please visit www.devonenergy.com . Investor Contact Media Contact investor.relations@dvn.com Michelle Hindmarch 405-228-4450 405-552-7460 NON-GAAP DISCL

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Text is the filed exhibit, verbatim.