v3.25.4
Insider Trading Arrangements
 12 Months Ended
Dec. 31, 2025
shares
Trading Arrangements, by Individual  
Material Terms of Trading Arrangement
The following table describes any contracts, instructions or written plans for the sale or purchase of NiSource securities and intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) of the Exchange Act that were adopted by our directors and executive officers during the quarter ended December 31, 2025:

Name and Title
Date of Adoption of Rule 10b5-1 Trading Plan
Scheduled Expiration Date of Rule 10b5-1 Trading Plan(1)
Aggregate Number of Securities to Be Purchased or Sold
Shawn Anderson

Executive Vice President, Chief Financial Officer

11/10/20255/29/2026
Sale of up to 12,500 shares of common stock
(1)A trading plan may also expire on such earlier date that all transactions under the trading plan are completed.

During the quarter ended December 31, 2025, none of our directors or executive officers terminated a Rule 10b5-1 trading plan or adopted or terminated a non-Rule 10b5-1 trading arrangement (as defined in Item 408(c) of Regulation S-K).
Non-Rule 10b5-1 Arrangement Adopted false
Rule 10b5-1 Arrangement Terminated false
Non-Rule 10b5-1 Arrangement Terminated false
Shawn Anderson [Member]  
Trading Arrangements, by Individual  
Name Shawn Anderson
Title Executive Vice President, Chief Financial Officer
Rule 10b5-1 Arrangement Adopted true
Adoption Date 11/10/2025
Expiration Date 5/29/2026
Arrangement Duration 200 days
Aggregate Available 12,500