On December 6, 2023, NiSource Inc. entered into the Augmenting Lender Supplement (the Supplement), with Mizuho Bank, LTD and Bank of Montreal (each an Augmenting Lender and collectively, the Augmenting Lenders), to the Credit Agreement dated as of November 9, 2023 (as amended, restated, supplemented or otherwise modified from time to time, the Credit Agreement), among the company, the Lenders party thereto and U.S. Bank National Association, as the Administrative Agent thereunder (the Administrative Agent). The Credit Agreement provides that any bank, financial institution or other entity may extend term loan commitments under the Credit Agreement, subject to the approval of the Company and the Administrative Agent, by executing and delivering to the company and the Administrative Agent a supplement to the Credit Agreement in the form of the Supplement. Under the Supplement, each Augmenting Lender agrees to be bound by the provisions of the Credit Agreement and become a Lender for all purposes of the Credit Agreement to the same extent as if originally a party thereto, with a commitment with respect to term loans, in the case of each Augmenting Lender, of $200 million.

Under the Credit Agreement, as modified by the Supplement, the Company borrowed $400 million on December 6, 2023, representing the aggregate commitments of the Augmenting Lenders thereunder.