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, Amendment No. 6 filed with the
Commission on November 17, 2011, Amendment No. 7 filed with the Commission on
March 29, 2013, Amendment No. 8 filed with the Commission on March 28, 2014,
Amendment No. 9 filed with the Commission on March 30, 2015, Amendment No. 10
filed with the Commission on March 30, 2016, Amendment No. 11 filed with the
Commission on January 20, 2017, Amendment No. 12 filed with the Commission on
March 21, 2018, Amendment No. 13 filed with the Commission on November 9, 2018,
Amendment No. 14 filed with the Commission on March 20, 2020 (as further amended
from time to time, the "Schedule 13D").  Those individuals and entities listed
in the Schedule 13D, including the filer of this Form 3, 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 3 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.