Southwestern Energy Investor Presentation

Haynesville - Core Stacked Pay Position Operational Plan(¹) Rigs Frac fleets 2023E LOUISIANA 7 son Caddo ty Parish 2-3 Wells drilled 52-56 % Haynesville / Middle Bossier 50% / 50% Wells completed 55-59 Panola County De Soto Parish % Haynesville / Middle Bossier 40%/60% Wells to sales % Haynesville / Middle Bossier Average lateral length Base decline 61-65 45% / 55% ~8,500 Capital Program (1) D&C capital $/lateral foot Cost Structure ($/Mcf) ~55% doches unty 2023E $1.0B $1.1B $1,950 $2,150 2023E $0.84 $0.90 LOE TOTI $0.22 $0.26 Natural Gas Discount to NYMEX ($/Mcf)(2) ($0.30 - $0.40) 1) Based on midpoint of guidance and related activity levels. 2) Discount to Henry Hub including transportation costs and heating content adjustment. TEXAS Shelby County Bossier Parish Haynesville Net Acres: 286,000 100% Gas 2023E Net Production: -1.8 Bcfe/day(1) 55% ~$1.9B D&C(1) 45% Sabine Parish swn Southwestern EnergyⓇ WeL---- Parish SWN Acreage Haynesville Core Middle Bossier Core Red River Parish Bienville Parish Natchitoches Parish LOUISIANA 40% 4.6 Bcfe/d(1) 60% Haynesville Appalachia 13

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