SCHEDULE 13G/A 0001600136-25-000004 0001600136 XXXXXXXX LIVE 1 Common Stock, par value $0.01 per share 12/31/2025 0001325702 MAGNACHIP SEMICONDUCTOR Corp 55933J203 c/o Magnachip Semiconductor, Ltd. 15F, 76 Jikji-daero 436beon-gil, Heungde Cheongju-si M5 28581 Rule 13d-1(b) Clearline Capital LP DE 0.00 1461036.00 0.00 1461036.00 1461036.00 4.1 IA PN Clearline Capital, LLC DE 0.00 1461036.00 0.00 1461036.00 1461036.00 4.1 HC Marc Majzner X1 0.00 1461036.00 0.00 1461036.00 1461036.00 4.1 HC IN MAGNACHIP SEMICONDUCTOR Corp c/o Magnachip Semiconductor, Ltd., 15F, 76 Jikji-daero 436beon-gil, Heungde, Cheongju-si, KOREA, REPUBLIC OF, 28581. Clearline Capital LP Clearline Capital LLC Marc Majzner Each a "Filer." The address for each Filer is 750 Lexington Avenue, 25th Floor, New York, NY 10022. See Item 4 of the cover page for each Filer. N IA HC See Item 9 of the cover page for each Filer. As of December 31, 2025, Clearline Capital LP may be deemed to beneficially own an aggregate of 1,461,036 shares of Common Stock of Magnachip Semiconductor Corporation. (the ?Issuer?). Owenership percentages are based on 35,981,823 Common Shares reported as issued and outstanding as of October 31, 2025, in the Issuer?s Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 10, 2025. See Item 11 of the cover page for each Filer. See Item 5 of the cover page for each Filer. See Item 6 of the cover page for each Filer. See Item 7 of the cover page for each Filer. See Item 8 of the cover page for each Filer. Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. Exhibit 1: Joint Filing Agreement Clearline Capital LP Marc Majzner 02/17/2026 Clearline Capital, LLC Marc Majzner 02/17/2026 Marc Majzner Marc Majzner 02/17/2026