STOCK TITAN

Amkor Technology (AMKR) CFO gains stock as RSUs vest

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Amkor Technology CFO Megan Faust exercised restricted stock units into common stock as part of her equity compensation. On March 31, 2026, 8,692 RSUs converted into 8,692 shares of common stock at a stated price of $0.00 per share. Of these, 3,725 shares, valued at $45.03 per share, were withheld by Amkor to cover her tax obligations, with the company paying the taxes on her behalf. After these transactions, she directly owned 134,138 shares of Amkor common stock. The vested RSUs relate to a 43,459-unit grant awarded on February 20, 2025, scheduled to vest in five equal quarterly installments from June 30, 2025 through June 30, 2026.

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Insider Faust Megan
Role CFO
Type Security Shares Price Value
Exercise Restricted Stock Units 8,692 $0.00 --
Exercise Common Stock 8,692 $0.00 --
Tax Withholding Common Stock 3,725 $45.03 $168K
Holdings After Transaction: Restricted Stock Units — 8,692 shares (Direct); Common Stock — 137,863 shares (Direct)
Footnotes (1)
  1. 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. 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.
RSUs converted 8,692 units Restricted Stock Units converting into common stock on March 31, 2026
Shares withheld for taxes 3,725 shares Common stock withheld at $45.03 per share for tax obligations
Post-transaction holdings 134,138 shares Amkor common stock directly owned by Megan Faust after the transactions
RSU grant size 43,459 units Restricted stock units granted on February 20, 2025, vesting through June 30, 2026
Withholding price $45.03 per share Value used for shares withheld to satisfy tax obligations
Restricted Stock Units financial
"The transaction represents shares withheld by Amkor Technology, Inc. in connection with the vesting of certain restricted stock units"
Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.
tax withholding obligations financial
"These shares were withheld to satisfy the Reporting Person's tax withholding obligations."
Equity Incentive Plan financial
"pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the related award agreement."
An equity incentive plan is a program that gives employees, executives or directors the right to receive company stock or options to buy stock as part of their pay. Think of it as offering slices of future company profit to motivate people to boost long‑term performance; for investors it matters because it can align employee goals with shareholder value but also increases the number of shares outstanding, which can dilute existing ownership.
vest financial
"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"
A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.
SEC Form 4
FORM 4UNITED 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
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Faust Megan

(Last)(First)(Middle)
2045 E INNOVATION CIRCLE

(Street)
TEMPE ARIZONA 85284

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
AMKOR TECHNOLOGY, INC. [ AMKR ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
CFO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
03/31/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)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)
CodeVAmount(A) or (D)Price
Common Stock03/31/2026M8,692A$0137,863D
Common Stock03/31/2026F(1)3,725D$45.03134,138D
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 (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)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 (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (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: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Units$003/31/2026M8,692 (2) (2)Common Stock8,692$08,692D
Explanation of Responses:
1. 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.
2. 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.
Remarks:
/s/ Mark N. Rogers, Attorney-in-Fact for Megan Faust04/02/2026
** Signature of Reporting PersonDate
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.
* Form 4: SEC 1474 (03-26)

FAQ

What did Amkor (AMKR) CFO Megan Faust report in this Form 4?

Amkor CFO Megan Faust reported the vesting and conversion of 8,692 restricted stock units into common stock, along with related tax withholding. These equity awards are part of her compensation under Amkor’s 2021 Equity Incentive Plan and follow a predefined vesting schedule.

How many Amkor (AMKR) shares does CFO Megan Faust hold after these transactions?

After the reported transactions, CFO Megan Faust directly holds 134,138 shares of Amkor common stock. This figure reflects both the newly vested shares from restricted stock units and the shares withheld by the company to satisfy her tax obligations on the vesting event.

What was the size and schedule of Megan Faust’s Amkor (AMKR) RSU grant?

On February 20, 2025, Megan Faust received a grant of 43,459 restricted stock units. These RSUs vest in five equal quarterly installments on June 30, 2025, September 30, 2025, December 31, 2025, March 31, 2026, and June 30, 2026, reaching full vesting by June 30, 2026.

Why were some Amkor (AMKR) shares withheld in Megan Faust’s Form 4 filing?

The Form 4 states that 3,725 shares were withheld by Amkor in connection with the RSU vesting to satisfy Megan Faust’s tax withholding obligations. Amkor will pay these taxes on her behalf, so the withheld shares function as payment in kind to the taxing authorities.

Is Megan Faust’s Amkor (AMKR) Form 4 transaction an open-market sale?

No, the Form 4 describes an RSU vesting and related tax withholding, not an open-market sale. Shares withheld under transaction code “F” were retained by Amkor to cover tax obligations, which differs from selling shares on an exchange for cash proceeds.

What type of securities did Megan Faust acquire in the Amkor (AMKR) Form 4?

Megan Faust acquired common stock through the exercise and settlement of restricted stock units. The filing shows 8,692 RSUs converting into an equal number of common shares at a stated price of $0.00 per share, consistent with typical restricted stock unit vesting mechanics.