Dimensional Fund Advisors LP Reduces Stake in Amkor Technology Inc to 4.4%

Dimensional Fund Advisors LP filed a Schedule 13G/A on April 9, 2026, reporting a 4.4% stake in Amkor Technology Inc (AMKR). As of the event date on March 31, 2026, the firm beneficially owns 10,991,469 shares of common stock. This filing represents an amendment to a previous position, indicating that the filer's ownership has dropped below the 5% threshold, as noted in Item 5. Dimensional Fund Advisors LP serves as an investment adviser to various funds, trusts, and accounts, possessing sole dispositive power over all 10,991,469 shares and sole voting power over 10,740,514 shares. The firm explicitly disclaims beneficial ownership of these securities, stating they are owned by the underlying Funds. The acquisition was made in the ordinary course of business without the intent to influence or change the control of the issuer. The principal business office for Dimensional Fund Advisors LP is located in Austin, Texas.