EXHIBIT 99.1

A Schedule 13D was filed by James J. Kim and those members of the reporting
group who then constituted the group on November 28, 2005, as amended by
Amendment No. 1 filed with the Securities and Exchange Commission (the
"Commission") on April 4, 2008, Amendment No. 2 filed with the Commission on
March 19, 2009, Amendment No. 3 filed with the Commission on April 16, 2009,
Amendment No. 4 filed with the Commission on February 5, 2010, Amendment
No. 5 filed with the Commission on March 28, 2011 and Amendment No. 6 filed
with the Commission on November 17, 2011 as further amended from time to time
(the "Schedule 13D"). Those individuals and entities listed in the Schedule
13D may be deemed to be members of a group (the "Group") who each exercise
voting or investment power with respect to shares of Amkor Technology, Inc.'s
(the "Issuer") Common Stock in concert with other members of the Group. The
Group may be deemed to beneficially own more than 10% of the outstanding
voting securities of the Issuer. The reporting person states that the filing
of this Form 5 Report shall not be deemed an admission that the reporting
person is the beneficial owner of the reported securities owned by the other
members of the Group, for the purpose of Section 16 of the Securities
Exchange Act of 1934, as amended, or for any other purpose.