NiSource(NI) - 2024 Q1 - Quarterly Results

Exhibit 99.1 FOR IMMEDIATE RELEASE: May 8, 2024 NiSource announces first quarter 2024 results • Reaffirming 2024 non-GAAP adjusted EPS guidance • Reaffirming 2023-2028 annual non-GAAP adjusted EPS growth of 6-8% MERRILLVILLE, Ind. - NiSource Inc. (NYSE: NI) today announced, on a GAAP basis, net income available to common shareholders for the three months ended March 31, 2024, of $344.3 million, or $0.77 of earnings per diluted share, compared to net income available to common shareholders of $319.2 million, ...