Agnes C. Kim - 20 Jul 2026 Form 4 Insider Report for AMKOR TECHNOLOGY, INC. (AMKR)

Reporting relationship: Member of 10% owner group (4)
Issuer ticker: AMKR
Reported as of: 20 Jul 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 22 Jul 2026, 16:33:20 UTC
Prior SEC filing: 30 Dec 2025
Source filing: View source filing
Reporting owner signature: /s/ Brian D. Short, Attorney-in-Fact for Agnes C. Kim

Key filing fact

Agnes C. Kim filed Form 4 for AMKOR TECHNOLOGY, INC. (AMKR) on 22 Jul 2026.

Key facts

This page summarizes Agnes C. Kim's Form 4 filing for AMKOR TECHNOLOGY, INC. (AMKR).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 22 Jul 2026, 16:33.

Change

Previous filing in this sequence was filed on 30 Dec 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001158840 Primary reporting owner

KIM AGNES C

Relationship: Member of 10% owner group (4)
Address: C/O SIANA CARR O'CONNOR & LYNAM, 1500 EAST LANCASTER AVENUE, PAOLI
Signature: /s/ Brian D. Short, Attorney-in-Fact for Agnes C. Kim
Signature date: 22 Jul 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

AMKR transaction

Common Stock

Options Exercise

Transaction value
Shares: +200,000
Change %: +1.9%
Price: $9.86^*
Shares after: 10,937,355
Date: 20 Jul 2026
Ownership: By Spouse
Footnotes: F1, F2

AMKR transaction

Common Stock

Options Exercise

Transaction value
Shares: +250,000
Change %: +2.3%
Price: $9.48^*
Shares after: 11,187,355
Date: 20 Jul 2026
Ownership: By Spouse
Footnotes: F2, F3

AMKR holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 0
Date: 20 Jul 2026
Ownership: Direct

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

On July 20, 2026, the Reporting Person's spouse exercised a stock option to acquire 200,000 shares of the Common Stock of Amkor Technology, Inc. (the "Issuer") that was granted to the Reporting Person's spouse on February 27, 2017.

Footnote F2

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 ("Section 16"), or for any other purpose.

Footnote F3

On July 20, 2026, the Reporting Person's spouse exercised a stock option to acquire 250,000 shares of the Issuer's Common Stock that was granted to the Reporting Person's spouse on February 15, 2019.

SEC remarks

(4) 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.