Exhibit 99.1 NEWS RELEASE Media Contact: Katie Nieri Sempra (877) 340-8875 media@sempra.com Financial Contact: Jenell McKay Sempra (877) 736-7727 investor@sempra.com Sempra Reports First-Quarter 2024 Results • Reports $3B System Resiliency Plan Filed at Oncor • Reaches FID on Cimarrón Wind Farm at Sempra Infrastructure SAN DIEGO, May 7, 2024 – Sempra (NYSE: SRE) (BMV: SRE) today reported first-quarter 2024 earnings, prepared in accordance with generally accepted accounting principles (GAAP), of $801 million ...