**Black Hills Corporation Completes $450 Million Debt Offering** Black Hills Corporation announced the completion of a new financing agreement through the issuance and sale of $450 million aggregate principal amount of 4.550% Notes due 2031. The debt offering, finalized on October 2, 2025, was made under an underwriting agreement previously disclosed on September 25, 2025, and issued pursuant to the company's registration statement on Form S-3. The company plans to use the net proceeds from the offering to repay or retire its outstanding $300 million 3.950% notes due January 15, 2026, with any remaining funds allocated for general corporate purposes such as capital expenditures, acquisitions, investments, and possible repayment or refinancing of other outstanding debt. The notes were issued under an existing indenture, supplemented specifically for this offering, with Computershare Trust Company, N.A. serving as trustee.