Amkor Technology, INC Form 4 insider transactions

Amkor Technology Director David N. Watson exercised 20,000 stock options, increasing his direct beneficial ownership of common stock.

Amkor Technology's Executive Vice President, Farshad Haghighi, sold 15,624 shares of common stock following the vesting of restricted stock units and tax withholding.

Amkor Technology's President and CEO, Kevin K. Engel, reported the vesting of restricted stock units and subsequent share disposals to cover tax obligations.

Amkor Technology's CFO, Megan Faust, reported the vesting of restricted stock units and related tax withholding transactions on February 20, 2026.

Amkor Technology's EVP & General Counsel, Mark N. Rogers, reported the vesting of restricted stock units and subsequent share withholdings for tax obligations.

Amkor Technology Director Guillaume Marie Jean Rutten acquired 172,329 shares of common stock through the vesting of restricted stock units.

Amkor Technology's Executive Vice President, Farshad Haghighi, reported the vesting of Restricted Stock Units and associated tax-related share disposals.

Amkor Technology's EVP & General Counsel, Mark N. Rogers, exercised stock options and subsequently sold 5,000 shares of common stock under a Rule 10b5-1 trading plan.

Amkor Technology Director Guillaume Marie Jean Rutten sold 10,000 shares of common stock for approximately $531,400 as part of a pre-arranged trading plan.

Amkor Technology's Executive Vice President, Kevin Engel, reported the vesting of restricted stock units and subsequent share withholding for tax obligations.

Amkor Technology CFO Megan Faust reported the vesting of 8,692 restricted stock units and the subsequent withholding of 3,725 shares for tax obligations on December 31, 2025.

Amkor Technology's President and CEO, Guillaume Rutten, converted 8,692 restricted stock units into common stock on December 31, 2025.

James J. Kim, a director and 10% owner of Amkor Technology, reported the indirect acquisition of 725,000 common shares through a family trust distribution.

A trust associated with a 10% owner of Amkor Technology, Inc. distributed 725,000 shares of common stock to a family trust.

Amkor Technology Director John T. Kim reported an indirect acquisition of 725,000 common shares through a family trust distribution.

Susan Y. Kim, a Director and 10% Owner of Amkor Technology, reported a disposition of 725,000 common shares from a grantor retained annuity trust.

Agnes C. Kim, a member of Amkor Technology's 10% owner group, reported the indirect acquisition of 725,000 common shares through a trust distribution.

Amkor Technology Director Douglas A. Alexander increased his beneficial ownership of Restricted Stock Units through the accrual of dividend equivalent units on December 23, 2025.

Amkor Technology Director Roger Carolin accrued additional restricted stock units through dividend equivalent units on December 23, 2025.

Amkor Technology director Winston J. Churchill acquired 20.0093 restricted stock units through dividend equivalents on December 23, 2025, increasing his direct beneficial ownership to 9,874.901 RSUs.

Amkor Technology Director Daniel Liao accrued 20.0093 dividend equivalent units tied to his restricted stock units following a dividend payment on December 23, 2025.

Amkor Technology Director MaryFrances McCourt acquired additional Restricted Stock Units through dividend equivalent units.

Amkor Technology Director Robert Randolph Morse accrued additional restricted stock units through dividend equivalent units following a December 23, 2025 dividend payment.

Amkor Technology Director Gil C. Tily accrued 20.0093 dividend equivalent units on December 23, 2025, tied to existing restricted stock units.

Amkor Technology Director David N. Watson accrued 20.0093 dividend equivalent units on his restricted stock units following a dividend payment.

Amkor Technology Director Susan Y. Kim reported the indirect acquisition of over 5.7 million shares of common stock through grantor retained annuity trusts and accrued dividend equivalent units.

Amkor Technology Director James J. Kim and his spouse transferred over 5.7 million shares of common stock to grantor retained annuity trusts.

Agnes C. Kim, a member of Amkor Technology's 10% owner group, reported significant transfers of common stock to grantor retained annuity trusts for estate planning purposes.

Amkor Technology Director Winston J. Churchill exercised stock options and subsequently sold an equal number of common shares on December 15, 2025, as part of a pre-arranged trading plan.

Amkor Technology's President and CEO, Guillaume Marie Jean Rutten, sold 10,000 shares of common stock for approximately $44.8 per share under a pre-arranged trading plan.