NISOURCE INC. (NI) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-05-22 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: NISOURCE INC. (NI) CIK: 0001111711 --- Reporting Owner --- Name: Berman Melanie B. CIK: 0001933743 Role: Officer (EVP Administration & CHRO) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-05-22 | Code: S (Open market sale) Shares: -15,000 | Price: $47.68 Total Value: $715,200.00 Shares Owned After: 35,989.9347 | Ownership: D (Direct) Footnotes: [F1] The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $47.670 to $47.713, inclusive. The reporting person undertakes to provide to NiSource Inc., any security holder of NiSource Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. --- Footnotes (Complete Index) --- F1: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $47.670 to $47.713, inclusive. The reporting person undertakes to provide to NiSource Inc., any security holder of NiSource Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. --- Signature --- /s/ /s/ Ashley Bancroft, Attorney-in-Fact (2026-05-27)