Form 3 Filing for Knife River Corp: Ownership of Common Stock by Peggy S. Rebstock

This filing details the ownership of Knife River Corp common stock by Peggy S. Rebstock, an officer (VP, CAO and Controller). As of May 21, 2026, Ms. Rebstock directly owns 1,865 shares of common stock. Additionally, she has a pecuniary interest in 43 shares held indirectly through the Peggy S. Rebstock Living Trust. The filing also notes restricted stock units (RSUs) that vest between 2026 and 2028, contingent upon continued employment. These RSUs include 484 vesting in 2026, 518 in 2027, and 863 in 2028, each representing one share of common stock.