Company: AMKR
Filing Date: 2025-03-25
Form Type: PRE 14A
Source: 0001193125-25-062595
Chunk: 0

Company: AMKOR TECHNOLOGY, INC.
Filing Date: 2025-03-25
Form: PRE 14A
Chunk 0
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box:

| ☒ |     | Preliminary Proxy Statement                                                    |
| ☐ |     | Confidential, for Use of the Commission Only (as permitted byRule 14a-6(e)(2)) |
| ☐ |     | Definitive Proxy Statement                                                     |
| ☐ |     | Definitive Additional Materials                                                |
| ☐ |     | §240.14a-12                                                                    |

AMKOR TECHNOLOGY, INC. (Name of Registrant as Specified In Its Charter) (Names of Person(s) Filing Proxy Statement, if other than the Registrant) Payment of Filing Fee (Check the appropriate box):

| ☒ |     | No fee required.                                |
| ☐ |     | Fee paid previously with preliminary materials. |
| ☐ |     | 14a-6(i)(1)                                     
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PRELIMINARY PROXY STATEMENT - SUBJECT TO COMPLETION DATED MARCH 25, 2025 2045 East Innovation Circle Tempe, Arizona 85284 April [ ], 2025 To Our Stockholders: You are cordially invited to attend the 2025 Annual Meeting of Stockholders of Amkor Technology, Inc. to be held on Thursday, May 15, 2025 at 9:00 a.m. EDT. We have determined that the Annual Meeting will be held in a virtual meeting format only, via the internet. You may attend the Annual Meeting, submit questions, and vote your shares electronically during the meeting via live webcast at www.virtualshareholdermeeting.com/AMKR2025. You will need the 16-digitcontrol number printed on your Notice of Annual Meeting of Stockholders or proxy card to participate in the Annual Meeting. We recommend that you log in at least 15 minutes before the Annual Meeting to ensure you are logged in when the meeting starts. The actions expected to be taken at the 2025 Annual Meeting of Stockholders are described in detail in the proxy statement and Notice of Annual Meeting of Stockholders. We also encourage you to read our 2024 Annual Report to Stockholders