X0306 4 2018-02-20 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, $0.10 par value per share 2018-02-20 4 D 0 5245.031 0.00 D 73452.2876 D Common Stock, $0.10 par value per share 2018-02-20 4 A 0 10323 0.00 A 83775.2876 D Forfeiture of restricted shares, including accumulated dividends, granted under the 2015 Long-Term Shareholder Value Program. This amount includes 1,188.964327 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 926 units, which represent interests in the Company's stock fund. Award of restricted stock units, which are settled in shares of stock upon vesting. The award vests in three equal annual installments on each of the first three anniversaries of the grant date. /s/ Elliot S. Davis, Attorney-in-Fact for Kevin B. Kramer 2018-02-22