X0306 4 2019-05-13 0 0001018963 ALLEGHENY TECHNOLOGIES INC ATI 0001635153 Morehouse David J 1000 SIX PPG PLACE PITTSBURGH PA 15222 1 0 0 0 Common Stock, par value $0.10 per share 2019-05-13 4 A 0 7145 0.00 A 26465.4028 D Annual Director award granted under the Issuer's 2017 Incentive Plan as part of the Issuer's Director compensation program. Includes 4,397 shares representing Mr. Morehouse's annual director award and 2,748 shares that Mr. Morehouse elected to receive in lieu of a portion of his 2019 cash retainer. Elliot S. Davis, Attorney-in-Fact for David J. Morehouse 2019-05-14