Nisource INC. 8-K Filing

Ticker: NI · Form: 8-K · Filed: Nov 7, 2025 · CIK: 1111711

Sentiment: neutral

Filing Stats: 1,248 words · 5 min read · ~4 pages · Grade level 11.3 · Accepted 2025-11-07 16:07:09

Key Financial Figures

Filing Documents

Financial Statements and Exhibits

Financial Statements and Exhibits. (d) Exhibits Exhibit Number Description 4.1 Third Supplemental Indenture, dated as of November 7, 2025, between NiSource Inc. and The Bank of New York Mellon, as trustee 4.2 Form of 5.750% Fixed-to-Fixed Reset Rate Junior Subordinated Notes due 2056 (included in Exhibit 4.1 hereto) 5.1 Opinion of McGuireWoods LLP regarding validity of the Notes 8.1 Opinion of McGuireWoods LLP regarding certain tax matters related to the Notes 23.1 Consent of McGuireWoods LLP (included in Exhibit 5.1) 23.2 Consent of McGuireWoods LLP (included in Exhibit 8.1) 104 Cover page Interactive Data File (embedded within the Inline XBRL document) Cautionary Statement Concerning Forward-Looking Statements This current report on Form 8-K contains forward-looking statements that are not historical facts, including statements about the anticipated use of proceeds from the sale of the Notes. These statements are based on current expectations and assumptions, which management believes are reasonable, and on information currently available to management, but are necessarily subject to various risks and uncertainties. In addition to the risk that these assumptions prove to be inaccurate, factors that could cause actual results to differ materially from those contemplated by the forward-looking statements include factors disclosed in the Company's Annual Report on Form 10-K for the year ended December 31, 2024, and its subsequent filings with the SEC, which are available on the Company's website at www.nisource.com and on the SEC's website at www.sec.gov. The Company undertakes no obligation to publicly update or revise any forward-looking statements, whether due to new information, future events or otherwise, except to the extent required by law.

SIGNATURES

SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. NiSource Inc. (Registrant) Date: November 7, 2025 By: /s/ Shawn Anderson Shawn Anderson Executive Vice President and Chief Financial Officer

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