X0306 4 2021-02-16 0 0001325702 MAGNACHIP SEMICONDUCTOR Corp MX 0001805443 Park Shin Young C/O MAGNACHIP SEMICONDUCTOR, LTD. 501, TEHERAN-RO, GANGNAM-GU SEOUL, REPUBLIC OF KOREA M5 06168 KOREA, REPUBLIC OF 0 1 0 0 See Remarks Common Stock 2021-02-16 4 A 0 3535 0.00 A 29258 D Common Stock 2021-02-16 4 F 0 1475 19.86 D 27783 D This transaction reflects shares of common stock issued in connection with the vesting of financial performance-based restricted stock units granted on June 2, 2020. This transaction represents the withholding by the Issuer of 1,475 shares of common stock to satisfy tax withholding obligations incurred by the Reporting Person upon the vesting of 3,535 shares of common stock issued in connection with the vesting of financial performance-based restricted stock units granted on June 2, 2020. Chief Accounting Officer and Principal Accounting Officer /s/ Theodore Kim, Attorney-in-Fact 2021-02-18