Form 4 Filing for ATI INC.

David J. Morehouse, a director at ATI INC., acquired 1743 shares of common stock on May 19, 2026. This acquisition was part of an annual award of restricted stock granted under the Issuer's 2022 Incentive Plan as compensation for his role as a director. The award vests one year after the grant date. The shares were acquired at no cost, as indicated by a price per share of $0.0. Following this transaction, Morehouse owns 38,311 shares of ATI INC. common stock.