Megan Faust - 31 Mar 2026 Form 4 Insider Report for AMKOR TECHNOLOGY, INC. (AMKR)

Reporting relationship: CFO
Issuer ticker: AMKR
Reported as of: 31 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 02 Apr 2026, 18:53:44 UTC
Prior SEC filing: 26 Feb 2026
Next SEC filing: 08 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Mark N. Rogers, Attorney-in-Fact for Megan Faust

Key filing fact

Megan Faust filed Form 4 for AMKOR TECHNOLOGY, INC. (AMKR) on 02 Apr 2026.

Key facts

This page summarizes Megan Faust's Form 4 filing for AMKOR TECHNOLOGY, INC. (AMKR).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 02 Apr 2026, 18:53.

Change

Previous filing in this sequence was filed on 26 Feb 2026.
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 0001684564 Primary reporting owner

Faust Megan

Relationship: CFO
Address: 2045 E INNOVATION CIRCLE, TEMPE
Signature: /s/ Mark N. Rogers, Attorney-in-Fact for Megan Faust
Signature date: 02 Apr 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: +8,692
Change %: +6.7%
Price: $0.000000^*
Shares after: 137,863
Date: 31 Mar 2026
Ownership: Direct

AMKR transaction

Common Stock

Tax liability

Transaction value
Shares: -3,725
Change %: -2.7%
Price: $45.03^*
Shares after: 134,138
Date: 31 Mar 2026
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

AMKR transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -8,692
Change %: -50%
Price: $0.000000^*
Shares after: 8,692
Date: 31 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 8,692
Exercise price: $0.000000
Footnotes: F2

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

The transaction represents shares withheld by Amkor Technology, Inc. (the "Issuer") in connection with the vesting of certain restricted stock units ("RSUs") granted to the Reporting Person on February 20, 2025 (the "Grant Date") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the related award agreement. These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person.

Footnote F2

On the Grant Date, the Reporting Person was granted 43,459 RSUs which vest in five equal quarterly installments on each of June 30, 2025, September 30, 2025, December 31, 2025, March 31, 2026, and June 30, 2026, such that 100% will be vested on June 30, 2026.