Investor Presentaiton

Devon-Owned Sand Mine to Improve Capital Efficiency Initial sand mine integrated into operations in Q2 ■ Provides up to 25% of Delaware sand requirements Estimated savings: >$200,000 per well ■ Improves safety & emissions performance ■ Potential to expand program across portfolio Q1 2022 Earnings Presentation DEVON-OWNED SURFACE ACREAGE IN TEXAS 15

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