NiSource Inc.

NiSource Inc. is a US-based energy holding company that owns regulated electric and natural gas utilities serving nearly four million customers across multiple states. Through subsidiaries such as NIPSCO, NiSource is pursuing a long-term strategy focused on emissions reduction, infrastructure modernisation, and system resilience. The company has committed to reducing greenhouse gas emissions and retiring coal-fired generation in favour of renewables, natural gas, and grid investments. NiSource operates under state-level regulation, meaning capital expenditure, cost recovery, and decarbonisation timelines are closely tied to regulatory approval. Federal emergency orders affecting its subsidiaries illustrate the exposure of utility holding companies to evolving grid reliability risks during the energy transition.