Sec Form 4 Filing - KIM JAMES J @ AMKOR TECHNOLOGY, INC. - 2022-07-12

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

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1. Name and Address of Reporting Person KIM JAMES J 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) 07/12/2022 (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 07/12/2022 G V 429,750( 1 ) D $ 0 2,298,355( 2 )( 3 ) I By SusanY. Kim GRAT dtd. 04/01/20 Common Stock 1,857,699( 4 ) D Common Stock 49,594,980( 2 )( 3 ) I By 915 Investments, LP Common Stock 1,957,350( 2 )( 3 ) I By John T. Kim Trust dtd. 12/11/12 Common Stock 7,828,682( 2 )( 3 ) I By John T. Kim Family Trust U/A dtd. 12/11/12 Common Stock 1,496,443( 2 )( 3 ) I By Susan Y. Kim GRAT dtd. 8/29/18 Common Stock 2,610,776( 3 ) I By spouse Common Stock 164,678( 2 )( 3 ) I By Susan Y. Kim Trust U/A dtd 12/11/12 Common Stock 6,430,381( 2 )( 3 ) I By self as Trustee of own GRATs

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 Restricted Stock Units ( 4 ) ( 4 ) ( 4 ) Common Stock 8,169 8,169( 2 ) D Restricted Stock Units ( 4 ) ( 4 ) ( 4 ) Common Stock 10,748 10,748( 2 ) D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other KIM JAMES J 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, as Attorney-in-Fact 08/01/2022 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On July 12, 2022, the Qualified Annuity Trust Under the Susan Y. Kim Irrevocable Trust Agreement dtd. 4/1/20 distributed 429,750 shares of the Common Stock of Amkor Technology, Inc. (the "Issuer") to Susan Y. Kim. Susan Y. Kim and the Reporting Person are the trustees of the trust. The Reporting Person is the father of Susan Y. Kim. ( 2 )The Reporting Person is (i) a trustee of trusts for the benefit of his immediate family members which own 13,580,830 shares of the Issuer's Common Stock, (ii) a trustee of a trust which is a controlling member of a limited liability company being treated as a corporation for purposes of Section 16 of the Securities Exchange Act of 1934, as amended ("Section 16"), which limited liability company holds 164,678 shares of the Issuer's Common stock, (iii) a trustee of grantor retained annuity trusts of which he was the settlor and is the sole annuitant which own 6,430,381 shares of the Issuer's Common Stock and (iv) a general partner of a limited partnership which owns 49,594,980 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares. ( 3 )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. ( 4 )As previously reported in Forms 4 filed by the Reporting Person on February 18, 2021 (the "Original 2021 Form 4") and February 25, 2022, time-vested restricted stock units with respect to shares of the Issuer's Common Stock were granted by the Issuer to the Reporting Person on February 11, 2021 and February 25, 2022 (such Units collectively, the "RSUs"). In the Original 2021 Form 4 and in subsequent Forms 4 filed by the Reporting Person, the RSUs were incorrectly reported in Table I. Table II, Column 9 and Table I, Column 5 of this Form 4 have been adjusted to reflect the unvested RSUs and the shares of Issuer's Common Stock directly owned by the Reporting Person as of the filing date of this Form 4.

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).

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