NiSource Inc. (NI) gained 3.49% on October 17, 2026, with shares settling at $42.68. The single-session advance added to a broader upward trend for the natural gas and electric utility company.
Over the trailing seven days, NiSource shares climbed 4.68%, while the 30-day gain reached 4.96%. The consistent upward movement across each measured timeframe suggests sustained buying interest in the stock.
With a market capitalization of $19.78 billion, NiSource remains one of the larger publicly traded regulated utility companies in the United States. The stock's performance over the past month reflects a steady accumulation of value across the near- and medium-term windows tracked.
The session's move pushed NiSource further into positive territory across all three measurement periods, with the 30-day gain of 4.96% representing the broadest advance of the three intervals reported.
