NiSource Inc. reported unaudited consolidated earnings results for the first quarter ended March 31, 2021. On a GAAP basis, net income available to common shareholders for the three months ended March 31, 2021 of $281.7 million, or $0.72 diluted earnings per share, compared to a net income available to common shareholders of $61.8 million, or $0.16 diluted earnings per share, for the same period of 2020.