Sec Form 4 Filing - KIM SUSAN Y @ AMKOR TECHNOLOGY, INC. - 2022-04-04

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL OMB Number: 3235-0287 Expires: November 30, 2011 Estimated average burden hours per response... 0.5

1. Name and Address of Reporting Person KIM SUSAN Y 2. Issuer Name and Ticker or Trading Symbol AMKOR TECHNOLOGY, INC. [ AMKR] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner _____ Officer (give title below) X __ Other (specify below) Member of 10% owner group (5) (Last) (First) (Middle) C/O SIANA CARR O'CONNOR & LYNAM,, 1500 EAST LANCASTER AVENUE 3. Date of Earliest Transaction (MM/DD/YY) 04/04/2022 (Street) PAOLI, PA19301-9713 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 04/04/2022 G V 755,000( 1 ) D $ 0 3,328,065( 2 )( 3 )( 4 ) I By Agnes C. Kim GRAT dtd 12/16/20 Common Stock 1,028,132( 2 )( 3 )( 4 ) I By John T. Kim GRAT dtd 2/6/18 Common Stock 1,401,123( 2 )( 3 )( 4 ) I By James J. Kim GRAT dtd 4/1/20 Common Stock 5,375,484 D Common Stock 2,675,911( 2 )( 3 )( 4 ) I By James J. Kim GRAT dtd 9/10/19 Common Stock 2,353,347( 2 )( 3 )( 4 ) I By James J. Kim GRAT dtd 12/15/21 Common Stock 4,224,548( 2 )( 3 )( 4 ) I By Susan Y. Kim GRATs Common Stock 9,181,498( 2 )( 3 )( 4 ) I By trusts (excl. GRATs) Common Stock 19,484,809( 2 )( 3 )( 4 ) I By Sujochil, LP Common Stock 2,478,325( 2 )( 3 )( 4 ) I By Sujoda Investments, LP Common Stock 8,200,000( 2 )( 3 )( 4 ) I By LLCs treated as corporations

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other KIM SUSAN Y C/O SIANA CARR O'CONNOR & LYNAM, 1500 EAST LANCASTER AVENUE PAOLI, PA19301-9713 X X Member of 10% owner group (5) Signatures /s/ Richard D. Rosen, Attorney-in-Fact 04/20/2022 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On April 4, 2022, the Agnes C. Kim 2020-1 Qualified Annuity Trust U/A dated 12/16/20 distributed 755,000 shares of the Common Stock of Amkor Technology, Inc. (the "Issuer") to Agnes C. Kim. The Reporting Person is the sole trustee of the trust. Agnes C. Kim and the Reporting Person are mother and daughter. ( 2 )The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts) which own 9,181,498 shares of the Issuer's Common Stock, (ii) a trustee of grantor retained annuity trusts created by members of her immediate family which own 10,786,578 shares of the Issuer's Common Stock, (iii) a trustee of grantor retained annuity trusts of which she was the settlor and is the sole annuitant which own 4,224,548 shares of the Issuer's Common stock, (iv) a general partner of a limited partnership which owns 19,484,809 shares of the Issuer's Common Stock, (v) a manager of limited liability companies being treated as corporations for purposes of Section 16 of the Securities Exchange Act of 1934, as amended ("Section 16"), ( 3 )(Continued from Footnote 2) which own 8,200,00 shares of the Issuer's Common Stock and (vi) a manager of a manager-managed limited liability company being treated as a limited partnership for purposes of Section 16 which owns 2,478,325 shares of the Issuer's Common Stock. ( 4 )Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of these shares. 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, or for any other purpose.

Remarks: 5. The Reporting Person states that the filing of this Form 4 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, or for any other purpose.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.