X0306 4 2018-05-01 0 0001047127 AMKOR TECHNOLOGY, INC. AMKR 0000923792 CHURCHILL WINSTON J 1200 LIBERTY RIDGE DRIVE SUITE 300 WAYNE PA 19087 1 0 0 0 Common Stock 2018-05-01 4 A 0 4700 0.00 A 33476 D Director Stock Option (Right to Buy) 8.51 2018-05-01 4 A 0 20000 0.00 A 2018-05-01 Amkor Technology, Inc. 20000 0 D These are restricted shares which vest 100% on the earlier of the first anniversary of the grant date, or the date of the first annual meeting of stockholders following the grant date These options vest 100% on the earlier of the first anniversary of the grant date, or the date of the first annual meeting of stockholders following the grant date, subject to continued service through the applicable date. Jerry C. Allison, Attorney-in-Fact for Winston J. Churchill 2018-05-03