Amkor Technology (AMKR)Weiss Asset Management LP added to its stake +217K shares

300K

Shares reported · +217K vs prior quarter

0.28%

Disclosed portfolio weight

$13.5M

Reported value

Holdings as of

Mar 31, 2026

Filed

Aug 14, 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. Jun 12, 2026InsiderDirector sold ~$391K of AMKR shares in the open market
2. Jun 16, 2026InsiderOfficer sold ~$431K of AMKR shares in the open market
3. Jul 14, 2026InsiderCFO sold ~$70K of AMKR shares in the open market
4. Jul 16, 2026InsiderOfficer sold ~$326K of AMKR shares in the open market
5. Jul 27, 2026Company filing · Form 8-K · ResultsReported its results
6. Jul 30, 2026InsiderCEO sold ~$151K of AMKR shares in the open market
7. Aug 5, 2026InsiderDirector sold ~$1.38M of AMKR shares in the open market
8. Aug 6, 2026InsiderDirector sold ~$1.36M of AMKR shares in the open market
9. Aug 7, 2026InsiderDirector sold ~$279K of AMKR shares in the open market
10. Aug 11, 2026InsiderCFO sold ~$54K of AMKR shares in the open market

What came next

1. Aug 17, 2026InsiderOfficer sold ~$299K of AMKR shares in the open market
2. Sep 8, 2026InsiderCFO sold ~$49K of AMKR shares in the open market
3. Oct 2, 2026InsiderDirector sold ~$275K of AMKR shares in the open market

How to read SEC Form 13F-HR

Form 13F is the quarterly report in which investment managers that oversee $100 million or more list the US-listed stocks and some other securities they held on the last day of the quarter.

Full guide: What is an SEC Form 13F?

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.

How this filing works

• SEC Form 13F

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.