X0306 4 2020-05-12 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 2020-05-12 4 A 0 21214 0.00 A 47679.4028 D Annual Director award under the Issuer's 2020 Incentive Plan as part of the Issuer's Director compensation program. Includes 13,577 shares representing Mr. Morehouse's annual director award and 7,637 shares that Mr. Morehouse elected, in December 2019, to receive in lieu of a portion of his 2020 cash retainer. Annual Director award granted under the Issuer's 2020 Incentive Plan as part of the Issuer's Director compensation program. /s/ Elliot S. Davis, Attorney-in-Fact for David J. Morehouse 2020-05-14