Item 4. Controls and Procedures

Disclosure Controls and Procedures

We have established disclosure controls and procedures to ensure that material information relating to Devon, including its consolidated subsidiaries, is made known to the officers who certify Devon’s financial reports and to other members of senior management and the Board of Directors.

Based on their evaluation, our principal executive and principal financial officers have concluded that our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934) were effective as of June 30, 2026 to ensure that the information required to be disclosed by Devon in the reports that it files or submits under the Securities Exchange Act of 1934 is recorded, processed, summarized and reported within the time periods specified in the SEC rules and forms.

Changes in Internal Control Over Financial Reporting

In connection with the Merger, we are in the process of integrating Coterra’s operations, processes and systems into our internal control structure. As this integration progresses, we anticipate changes to our combined internal control environment that may affect our internal control over financial reporting. For additional information regarding the Merger, see Note 2 in “Part I. Financial Information – Item 1. Financial Statements” in this report.

Other than as described above in connection with the Merger, there were no changes in our internal control over financial reporting that occurred during the quarter ended June 30, 2026 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Table of Contents

PART II. Other Information

Item 1. Legal Proceedings

We are involved in various legal proceedings incidental to our business. However, to our knowledge as of the date of this report and subject to the environmental matters noted in Part I, Item 3. Legal Proceedings of our 2025 Annual Report on Form 10-K and the matters described below, there were no material pending legal proceedings to which we are a party or to which any of our property is subject. For more information on our legal contingencies, see Note 18 in “Part I. Financial Information – Item 1. Financial Statements” of this report.

Environmental Matters

Devon has elected to use a $1 million threshold for disclosing certain proceedings arising under federal, state or local environmental laws when a governmental authority is a party. Devon believes proceedings under this threshold are not material to Devon’s business, financial condition and results of operations.

On June 26, 2023, we received a NOV from the EPA relating to alleged air emission violations by Coterra Energy Operating Co. (f/k/a Cimarex Energy Co.), a subsidiary of the Company, during 2020 and 2022 in Texas and New Mexico. On July 25, 2023, we subsequently received a letter from the U.S. Department of Justice that the EPA has referred this matter for civil enforcement proceedings. On August 17, 2023, we received a separate NOV from the EPA relating to alleged air emission violations by Coterra Energy Operating Co. during 2023 in New Mexico. The Company has been engaging with the EPA to resolve each of these matters, which remain ongoing, and management cannot predict their ultimate outcome; however, resolution of each of these matters may result in a fine or penalty in excess of $1 million.

Please see our 2025 Annual Report on Form 10-K and other SEC filings for additional information.