X0508 4 2025-02-10 0000067716 MDU RESOURCES GROUP INC MDU 0001195487 JOHNSON DENNIS W 1200 WEST CENTURY AVENUE BISMARCK ND 58503 1 0 Common Stock 2025-02-10 4 P 0 30000.0000 16.6400 A 180166.0000 D Common Stock 163.2879 I By Spouse Mr. Johnson purchased the shares in open market transactions. The stock price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $16.61 to $16.65, inclusive. The reporting person undertakes to provide to the Company, any security holder of the Company, or the staff of the U.S. Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote. Anthony D. Foti, Attorney-in-Fact for Dennis W. Johnson 2025-02-10