Megan C. Lyon's Transactions in MillerKnoll, Inc. Common Stock

On August 1, 2025, Megan C. Lyon, Chief Strategy and Technology Officer of MillerKnoll, Inc., engaged in multiple transactions involving the company's common stock. These transactions included the acquisition and disposition of shares, as well as the vesting of restricted stock units (RSUs). The RSUs, which represent a contingent right to receive one share of common stock, vested according to a three-year schedule, with 25% vesting at year one, 25% at year two, and 50% at year three. The transactions also included the issuance of shares pursuant to Performance Share Units granted on July 12, 2022, under the company's 2020 Long-Term Incentive Plan. The total number of shares owned by Lyon following these transactions was 72,330.0315.