Southwestern Energy Investor Presentation

Core Stacked Haynesville and Middle Bossier Opportunity SWN 2022 Wells to Sales Caddo North Haynesville *Bossier Webster SWN acreage Haynesville Core Middle Bossier Core SWN 2022 wells to sales Linco Desoto East Well Performance (Mcf/ft) (1) Cumulative Mcf/ft ⚫22 Haynesville 22 Middle Bossier 700 600 500 400 300 200 100 Southwestern Energy® 21 Haynesville 21 Middle Bossier Texas Red River DeSoto Bienville Jac Natchito Desoto East Southwest Haynesville Sabine Louisiana Wir 30 60 90 120 150 180 Producing Days Southwest/North Well Performance (Mcf/ft) (1) 22 Haynesville 21 Haynesville Cumulative Mcf/ft 22 Middle Bossier 700 600 500 400 300 200 100 21 Middle Bossier 30 60 90 Producing Days 120 150 180 Consistently strong well performance year over year and across zones Source: SWN internal daily production data. 1) Wells included based on sales year and production normalized to a completed lateral ft. 15

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