[8-K] AMKOR TECHNOLOGY, INC. Reports Material Event

Rhea-AI Filing Summary

Amkor Technology (AMKR) reported that director John Liu resigned from its Board on October 28, 2025. The company stated the resignation was not due to any disagreements regarding operations, policies, or practices.

In connection with the change, the Board was reduced from eleven to ten directors. Mr. Liu will join Amkor as Executive Vice President, Corporate Development and Strategy on November 3, 2025.

Insights

Corporate Governance Analyst

Director resigns without dispute; same individual becomes EVP of Corporate Development and Strategy.

Amkor Technology, Inc. disclosed that John Liu resigned from the Board on October 28, 2025 with no disagreements on operations, policies, or practices. The Board size was reduced from eleven to ten. Liu will join management as Executive Vice President, Corporate Development and Strategy effective November 3, 2025.

This moves Liu from an oversight role to an operating role focused on corporate development and strategy. The filing does not describe compensation or additional terms. Governance-wise, the immediate effect is a smaller Board and an expanded executive team.

Key items to note are the effective date of November 3, 2025 and the new organizational alignment. Subsequent disclosures, if any, may detail employment terms or responsibilities tied to this position.

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported)

October 28, 2025

AMKOR TECHNOLOGY, INC.

(Exact name of registrant as specified in its charter)

Delaware

000-29472

23-1722724

(State or Other Jurisdiction of Incorporation)

(Commission File Number)

(IRS Employer Identification No.)

2045 EAST INNOVATION CIRCLE

TEMPE, AZ 85284

(Address of principal executive offices, including zip code)

(480) 821-5000

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class			Trading Symbol			Name of Each Exchange on Which Registered
Common Stock, $0.001 par value			AMKR			The NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

(b) On October 28, 2025, John Liu, resigned as a member of the Board of Directors (the “Board”) of Amkor Technology, Inc. (the “Company”). The resignation was not due to any disagreements with the Company on any matter relating to the Company’s operations, policies or practices.

In connection with Mr. Liu’s resignation, the Board reduced the size of the Board from eleven to ten directors.

Mr. Liu joins the Company as Executive Vice President, Corporate Development and Strategy on November 3, 2025.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

AMKOR TECHNOLOGY, INC.

By:

/s/ Mark N. Rogers

Mark N. Rogers

Executive Vice President, General Counsel and Corporate Secretary

Date: November 3, 2025

FAQ

Who resigned from the AMKR Board of Directors?

Director John Liu resigned from the Board.

Did John Liu resign due to disagreements with Amkor (AMKR)?

No. The company stated his resignation was not due to any disagreements on operations, policies, or practices.

What role will John Liu take at Amkor (AMKR) and when does he start?

He will become Executive Vice President, Corporate Development and Strategy on November 3, 2025.

How did Amkor's Board size change after the resignation?

The Board was reduced from eleven to ten directors.

What is Amkor Technology’s trading symbol and exchange?

Amkor trades as AMKR on The NASDAQ Global Select Market.