X0306 5 2019-12-31 0 0 0 0001047127 AMKOR TECHNOLOGY, INC. AMKR 0001158839 KIM JAMES J 2045 EAST INNOVATION CIRCLE TEMPE AZ 85284 1 0 1 1 Exhibit 99.1 Common Stock 2019-01-30 5 J 0 95000 7.88 D 17735697 I By self as trustee Common Stock 2019-01-30 5 J 0 95000 7.88 A 51371803 D Common Stock 2019-10-09 5 J 0 215700 9.65 D 17735697 I By self as trustee Common Stock 2019-10-17 5 J 0 4000000 9.88 D 51371803 D Common Stock 2019-10-17 5 J 0 4000000 9.88 A 17735697 I By self as trustee Common Stock 2019-12-16 5 J 0 443100 12.92 D 17735697 I By self as trustee Common Stock 2019-12-16 5 J 0 443100 12.92 A 51371803 D On January 30, 2019, the James J. Kim 2014 Qualified Annuity Trust U/A dated 10/13/14 distributed 95,000 shares of the Issuer's Common Stock to James J. Kim. James J. Kim and Susan Y. Kim are co-trustees of the trust. On October 9, 2019, the Qualified Annuity Trust under the Susan Y. Kim 2018-1 Irrevocable Trust Agreement dtd August 29, 2018 distributed 215,700 shares of the Issuer's Common Stock to Susan Y. Kim. James J. Kim and Susan Y. Kim are co-trustees of the trust. On October 17, 2019, James J. Kim transferred 4,000,000 shares of the Issuer's Common Stock to the James J. Kim 2019-1 Qualified Annuity Trust U/A Dated 9/10/19. James J. Kim and Susan Y. Kim are co-trustees of the trust. On December 16, 2019, the James J. Kim 2018-1 Qualified Annuity Trust U/A dtd 8/30/18 transferred 443,100 shares of the Issuer's Common Stock to James J. Kim. James J. Kim and Susan Y. Kim are co-trustees of the trust. The reporting person disclaims beneficial ownership of these securities, except to the extent of the reporting person's pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities, except to the extent of the reporting person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose. Mark N. Rogers, as Attorney in Fact 2020-02-14