Amkor Technology (AMKR)10% owner sold ~$485M

~$485M

Approx. value · 10M sh @ $48.49

29.6M

Holds after · shares reported

Traded

Feb 12, 2026

Filed

Feb 17, 2026

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

1. Dec 12, 2025Insider · 3 peopleInsiders: 3 sales (~$2.4M)
2. Dec 15, 2025Insider · 2 peopleInsiders: 2 sales (~$669K)
3. Dec 16, 2025InsiderOfficer sold ~$859K of AMKR shares in the open market
4. Jan 15, 2026InsiderDirector sold ~$531K of AMKR shares in the open market
5. Jan 16, 2026InsiderOfficer sold ~$246K of AMKR shares in the open market
6. Feb 2, 2026Company filing · Form 8-K · Executive changeChanged a top executive or board member“On February 2, 2026, Amkor Technology, Inc. (the “Company”) appointed Cherie Buntyn to serve as the Company’s Senior Vice President and Chief Accounting Officer, in which capacity she will serve as the Company’s principal accounting officer.”
7. Feb 9, 2026Company filing · Form 8-K · ResultsReported its results
8. Feb 12, 2026 · this disclosureInsider · Their largest sale since 202010% owner sold ~$485M of AMKR shares in the open market

What came next

1. Feb 12, 2026InsiderInsider sold ~$485M of AMKR shares in the open market
2. Feb 17, 2026Insider · 3 peopleInsiders: 3 sales (~$938K)
3. Feb 24, 2026Insider · 2 peopleInsiders: 2 sales (~$1.6M)
4. Feb 25, 2026InsiderOfficer sold ~$789K of AMKR shares in the open market
5. Mar 16, 2026InsiderOfficer sold ~$223K of AMKR shares in the open market
6. Apr 16, 2026InsiderOfficer sold ~$297K of AMKR shares in the open market
7. Apr 27, 2026Company filing · Form 8-K · ResultsReported its results
8. Apr 30, 2026Company filing · Form 8-K · Material agreement, New debtSigned an important agreement, and took on new debt or obligations (and 1 more item)
9. May 5, 2026Insider · 3 peopleInsiders: 4 sales (~$2.4M)
10. May 8, 2026Insider · Their largest sale since 2015Director sold ~$3.71M of AMKR shares in the open market
11. May 11, 2026Insider · Their largest sale since 2017Director sold ~$1.16M of AMKR shares in the open market
12. May 18, 2026InsiderOfficer sold ~$358K of AMKR shares in the open market
13. May 19, 2026InsiderCFO sold ~$65K of AMKR shares in the open market
14. Jun 9, 2026InsiderCFO sold ~$70K of AMKR shares in the open market

How to read SEC Form 4

Form 4 is the filing that officers, directors and owners of more than 10% of a US-listed company must send to the SEC within two business days after they buy, sell or otherwise change their holding of the company's stock.

Full guide: What is an SEC Form 4?

What else is on file for Amkor Technology

For Amkor Technology, OQRO holds 11 insider filings (SEC Form 4 or Form 144) and 8 fund holdings reports (13F) dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its AMKR page.

Other recent filings by KIM JOHN T, 10% owner

• SEC Form 4 at Amkor Technology (AMKR)Aug 5, 2025
• SEC Form 4 at Amkor Technology (AMKR)Feb 26, 2025

The full history of KIM JOHN T, 10% owner is on the profile page.

How this filing works

• SEC Form 4
• Open-market purchase
• Rule 10b5-1 trading plans

Other disclosures at Amkor Technology

• SEC Form 4Oct 6, 2026
• SEC Form 144Oct 2, 2026
• SEC Form 4Sep 10, 2026
• SEC Form 4Aug 19, 2026
• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRAug 14, 2026

Everything OQRO holds on this company is on its AMKR page.