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 3BSystemResiliencyPlanFiledatOncor•ReachesFIDonCimarroˊnWindFarmatSempraInfrastructureSANDIEGO,May7,2024–Sempra(NYSE:SRE)(BMV:SRE)todayreportedfirst−quarter2024earnings,preparedinaccordancewithgenerallyacceptedaccountingprinciples(GAAP),of801 million ...