X0306 4 2021-12-31 0 0001325702 MAGNACHIP SEMICONDUCTOR Corp MX 0001805443 Park Shin Young C/O MAGNACHIP SEMICONDUCTOR, LTD., 501, TEHERAN-RO, GANGNAM-GU SEOUL M5 06168 KOREA, REPUBLIC OF 0 1 0 0 Chief Financial Officer (4) Common Stock 2021-12-31 4 F 0 441 20.97 D 32503 D Common Stock 2021-12-31 4 F 0 787 20.97 D 31716 D Common Stock 2021-12-31 4 F 0 1057 20.97 D 30659 D This transaction represents the withholding by the Issuer of 441 shares of common stock to satisfy tax withholding obligations incurred by the Reporting Person upon the vesting of 934 shares of common stock originally awarded to the Reporting Person on October 22, 2019. This transaction represents the withholding by the Issuer of 787 shares of common stock to satisfy tax withholding obligations incurred by the Reporting Person upon the vesting of 1,667 shares of common stock originally awarded to the Reporting Person on May 7, 2020. This transaction represents the withholding by the Issuer of 1,057 shares of common stock to satisfy tax withholding obligations incurred by the Reporting Person upon the vesting of 2,237 shares of common stock originally awarded to the Reporting Person on February 19, 2021. (4) Appointed as Chief Financial Officer and Principal Financial Officer as of January 1, 2022. /s/ Theodore Kim, Attorney-in-Fact 2022-01-04