Material Event (Form 8-K)

On June 5, 2026, Devon Energy Corporation (the "Company" or "Devon") filed a prospectus supplement (the "Prospectus Supplement") to its previously filed automatic shelf registration statement on Form S-3 (333-294988) registering the issuance of up to an aggregate of 175,000 shares of the Company's common stock, par value $0.10 per share (the "Shares").

The Shares are issuable upon conversion of shares of 8 ¹/₈ % Series A Cumulative Perpetual Convertible Preferred Stock, par value $0.01 per share ("Coterra Preferred Stock"), of Coterra Energy Operating Co., plus additional shares that may be issued in connection with stock splits, stock dividends, anti-dilution provisions or other transactions. In connection with, and effective upon consummation of, the merger (the "Merger") of Cubs Merger Sub, Inc., a wholly owned subsidiary of Devon, with and into Coterra Energy Inc., the parent of Coterra Energy Operating Co., the Certificate of Designations for the Coterra Preferred Stock was amended to provide for the issuance of Devon's common stock upon conversion of the Coterra Preferred Stock.

The Company is filing this report to provide the legal opinion as to the validity of the Shares covered by the Prospectus Supplement, which opinion is attached hereto as Exhibit 5.1.