X0306 4 2020-02-26 0 0001018963 ALLEGHENY TECHNOLOGIES INC ATI 0001549592 Kramer Kevin B 1000 SIX PPG PLACE PITTSBURGH PA 15222 0 1 0 0 Sr. VP, CCMO Common Stock, par value $0.10 per share 2020-02-26 4 F 0 2983 18.62 D 130824.5562 D Common Stock, par value $0.10 per share 2020-02-27 4 F 0 2263 18.12 D 128561.5562 D Shares withheld for payment of taxes on performance/restricted stock granted in 2015 that vested on February 26, 2020. Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 26, 2020. This amount includes 1512.1441 shares of common stock that Mr. Kramer owns in the Company's 401(k) Plan. Fluctuations in 401(k) share amounts reflect the Plan's unit reporting method. Mr. Kramer holds approximately 1,268 units, which represent interests in the Company's stock fund. Shares withheld for payment of taxes on restricted stock units awarded on February 27, 2019. One-third of such restricted stock units vested by their terms on February 27, 2020. Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 27, 2020. /s/ Elliot S. Davis, Attorney-in-Fact for Kevin B. Kramer 2020-02-28