X0306 4 2021-01-04 0 0001018963 ALLEGHENY TECHNOLOGIES INC ATI 0001498160 Schwartz Karl D 1000 SIX PPG PLACE PITTSBURGH PA 15222 0 1 0 0 VP, Controller & CAO Common Stock, par value $0.10 per share 2021-01-04 4 A 0 14420 0.00 A 61975.6104 D 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. This amount includes 6,197.556351 shares of common stock Mr. Schwartz owns in the Company's 401(k) plan. Fluctuations in 401(k) share amounts reflect the plan's unit reporting method. The reporting person holds approximately 5,191 units, which represent interests in the Company's stock fund. /s/ Elliot S. Davis, Attorney-in-Fact for Karl D. Schwartz 2021-01-06