X0508 4 2024-10-31 1 0002015845 Everus Construction Group, Inc. ECG 0000067716 MDU RESOURCES GROUP INC 1200 WEST CENTURY AVENUE BISMARCK ND 58503 1 0 Common Stock 2024-10-31 4 J 0 50972059.0000 0.0000 D 0.0000 D On October 17, 2024, MDU Resources Group, Inc. ("MDU Resources") reported that it owned 1,000 shares of common stock of Everus Construction Group, Inc. ("Everus"), which at the time was all of the issued and outstanding shares of common stock of Everus. On October 21, 2024, Everus effected a stock split of its outstanding shares of common stock, resulting in 50,972,059 shares of Everus common stock issued and outstanding and held by MDU Resources. Effective 11:59 p.m. ET on October 31, 2024, MDU Resources distributed 100% of the issued and outstanding shares of Everus common stock to the holders of MDU Resources common stock at the close of business on October 21, 2024 in a pro rata dividend. /s/ Anthony D. Foti, CLO & Corporate Secretary 2024-11-01