NISOURCE INC.

Note regarding forward-looking statements

This Quarterly Report on Form 10-Q contains "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended (the "Securities Act"), and Section 21E of the Securities Exchange Act of 1934, as amended (the "Exchange Act"). These forward-looking statements include, but are not limited to, statements concerning our plans, strategies, objectives, expected performance, planned expenditures, recovery of expenditures through rates, stated on either a consolidated or segment basis, and any and all underlying assumptions and other statements that are not statements of historical fact. Expressions of future goals and expectations and similar expressions reflecting something other than historical fact, including "may," "will," "should," "could," "would," "aims," "seeks," "expects," "plans," "anticipates," "intends," "believes," "estimates," "predicts," "potential," "targets," "forecast," and "continue," are intended to identify forward-looking statements. All forward-looking statements are based on assumptions that management believes to be reasonable; however, there can be no assurance that actual results will not differ materially. Investors and prospective investors should understand that many factors impact whether any forward-looking statement contained herein will, or can be, realized. Any one of those factors could cause actual results to differ materially from those projected.

Factors that could cause actual results to differ materially from those projected in any forward-looking statement discussed in this Quarterly Report on Form 10-Q include, among other things:

•our ability to execute our business plan or growth strategy, including utility infrastructure investments, or business opportunities;

•our ability to manage data center growth in our service territories;

•potential incidents and other operating risks associated with our business;

•our ability to work successfully with our JV partners;

•our ability to construct, develop and place into service generation and transmission assets we develop to support our current and any future data center contracts on time or at all and consistent with initial cost estimates, as well as the performance of such assets once constructed and placed into service;

•our ability to obtain the significant additional financing required to construct the generation and transmission assets we develop to support our current and any future data center contracts on favorable terms, if at all;

•our ability to recover our investments and realize our expected return under our Current Data Center Contracts and any future data center contracts that we enter into;

•our ability to maintain our investment grade credit ratings as we finance and pursue our data center strategy, including our performance under our Current Data Center Contracts and any future data center contracts that we enter into;

•performance by our customers under our Current Data Center Contracts and any future data center contracts;

•any default by a current or future data center customer or any decision by a current or future data center customer, if applicable, to reduce committed capacity under, or to terminate, such contracts;

•potential changes in the MISO accreditation treatment of capacity resources;

•our ability to adapt to, and manage costs related to, advances in technology, including alternative energy sources and changes in related laws and regulations;

•our increased dependency on technology;

•impacts related to our aging infrastructure;

•our ability to obtain sufficient insurance coverage and whether such coverage will protect us against significant losses;

•the success of our electric generation strategy;

•construction risks and supply risks;

•fluctuations in demand from residential and commercial customers;

•fluctuations in the price of energy commodities and related transportation costs or an inability to obtain an adequate, reliable and cost-effective fuel supply to meet customer demand;

•our ability to attract, retain or re-skill a qualified workforce and maintain good labor relations;

•our ability to manage new initiatives and organizational changes;

•the performance and quality of third-party suppliers and service providers;

•our ability to manage the financial and operational risks related to achieving our carbon emission reduction goals, including our Net Zero Goal (as defined above), including any future associated impact from business opportunities such as data center development as those opportunities evolve;

•regulation and the impact of regulatory rate reviews;

•our ability to obtain expected financial or regulatory outcomes;

•any damage to our reputation;

•the impacts of natural disasters, acts of terrorism, acts of war or other catastrophic events;

•the physical impacts of climate change and the transition to a lower carbon future;

•potential cybersecurity attacks or security breaches;

•increased requirements and costs related to cybersecurity;

•our debt obligations;

•any changes to our credit ratings or the credit ratings of certain of our subsidiaries;

•adverse economic and capital market conditions, including increases in inflation or interest rates, recession, or changes in investor sentiment;

•the actions of activist stockholders;

•economic conditions in certain industries;

•the ability of customers and suppliers to fulfill their payment and contractual obligations;

•the ability of our subsidiaries to generate cash;

•pension funding obligations;

•potential impairments of goodwill;

•the outcome of legal and regulatory proceedings, investigations, incidents, claims and litigation;

•compliance with changes in, or new interpretations of applicable laws, regulations and tariffs;

•the cost of compliance with environmental laws and regulations and the costs of associated liabilities;

•changes in tax laws or the interpretation thereof; and

•other matters set forth in Part I, Item 2, “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” and Part II, Item 1A, “Risk Factors,” of this report, and Part I, Item 1, “Business,” Part I, Item 1A, "Risk Factors," and Part II, Item 7, "Management’s Discussion and Analysis of Financial Condition and Results of Operations," of our Annual Report on Form 10-K for the fiscal year ended December 31, 2025, some of which risks are beyond our control.

In addition, the relative contributions to profitability by each business segment, and the assumptions underlying the forward-looking statements relating thereto, may change over time.

All forward-looking statements are expressly qualified in their entirety by the foregoing cautionary statements. We undertake no obligation to, and expressly disclaim any such obligation to, update or revise any forward-looking statement to reflect changed assumptions, the occurrence of anticipated or unanticipated events or changes to expected results over time or otherwise, except as required by law.

PART I

ITEM 1. FINANCIAL STATEMENTS

Condensed Statements of Consolidated Income (unaudited)