Haynesville Core Operations and ESG Overview

Haynesville Operational Improvements Drilling Footage Per Day (ft/day) 600 Drilling Days on Location (days) (2) 90 500 400 300 200 100 2021 2022 Q1 2023 2023E Average Drilled Lateral Length (ft) 12,000 10,000 8,000 6,000 4,000 2,000 III 2021 2022 Q1 2023 2023E 10% 2023E 75 Increase (1) 60 45 30 15 2021 2022 Q1 2023 swn Southwestern EnergyⓇ 2023E 10% 2023E Decrease(1) Completed Footage Per Day (lateral ft/day) 900 750 10% 2023E Increase(1) 600 450 300 150 2021 2022 Q1 2023 2023E Delivered tangible operational improvements in first year of operations; targeting 10% further improvement in 2023 Source: SWN internal operational data. Targeted improvement for 2023 vs. 2022 actuals. 1) 2) Days on location per well. 16

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