X0306 4 2018-11-29 0 0001018963 ALLEGHENY TECHNOLOGIES INC ATI 0001200244 HARSHMAN RICHARD J 1000 SIX PPG PLACE PITTSBURGH PA 15222-5479 1 1 0 0 Chairman, President and CEO Common Stock, $0.10 par value per share 2018-11-29 4 G 0 17500 0.00 D 560388.7688 D The securities were gifted to The Harshman Family Foundation, which is an Internal Revenue Code section 501(c)(3) charitable organization. Mr. Harshman has sole investment authority with respect to the Foundation's assets. This amount includes 25,687 shares of common stock owned indirectly by Mr. Harshman's wife. The reporting person disclaims beneficial ownership of the shares held directly or indirectly by his spouse, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such shares for the purposes of Section 16 or for any other purpose. /s/ Elliot S. Davis, Attorney-in-Fact for Richard J. Harshman 2018-12-03