NiSource shares declined 2.4% post-earnings as investors took a cautious view despite stable adjusted EPS and reaffirmed guidance, likely reflecting tempered enthusiasm around growth prospects and margin pressures hinted at in operational updates.

• Reported Q1 2026 adjusted EPS of $1.06, representing 52% of the midpoint of full-year guidance of $2.02–$2.07.
• Reaffirmed full-year adjusted EPS guidance, with an upgraded 2023–2033 CAGR to 9–10%, targeting upper range driven by data center investments.
• Operational safety remained strong, achieving the safest Q1 on record with extensive leak detection and infrastructure inspections exceeding targets.
• AI and process improvements boosted operational efficiency, including a 20% productivity increase in contract management.
• Regulatory environment supportive but requires balancing affordability and system modernization; new federal orders add uncertainty to coal plant operations.