NiSource(NI) - 2025 Q1 - Quarterly Results

Exhibit 99.1 FOR IMMEDIATE RELEASE May 7, 2025 FOR ADDITIONAL INFORMATION Media Investors Kristen King Investor Relations Finance Communications investors@nisource.com (380) 268-3023 kking@nisource.com NiSource announces first quarter results This press release includes financial results and guidance for NiSource with respect to adjusted net income available to common shareholders and adjusted EPS, which are non-GAAP financial measures as defined by the SEC. The company includes these measures because manag ...