For Immediate Release February 28, 2024 Southwest Gas Holdings, Inc. Reports Fourth Quarter and Full-Year 2023 Financial Results Improved Utility ROE, Strong Centuri Revenue, Net Income, and Adjusted EBITDA Previously Announced Plan to Separate Centuri Remains On Track Initiated 2024 Utility Earnings and Capital Expenditures Guidance and 2024-2026 Utility Adjusted Net Income CAGR and Rate Base CAGR Guidance LAS VEGAS – February 28, 2024 – Southwest Gas Holdings, Inc. (NYSE: SWX) (“Southwest Gas” or “Company ...