8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): September 13, 2021

MAGNACHIP SEMICONDUCTOR CORPORATION

(Exact Name of Registrant as Specified in its Charter)

Not Applicable

(Zip Code)

(352) 45-62-62

(Registrant’s telephone number, including area code)

Not Applicable

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 8.01. Other Events

As previously disclosed, on March 25, 2021, Magnachip Semiconductor Corporation, a Delaware corporation (the “Company”), South Dearborn Limited, an exempted company incorporated in the Cayman Islands with limited liability (“Parent”) formed by an affiliate of Wise Road Capital LTD (“Wise Road”), and Michigan Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent (“Merger Sub”), entered into an Agreement and Plan of Merger (the “Merger Agreement”). The Merger Agreement provides that, among other things, and subject to the terms and conditions thereof, Merger Sub will be merged with and into the Company (the “Merger”), with the Company continuing its corporate existence under the General Corporation Law of the State of Delaware as the surviving corporation in the Merger and becoming a wholly owned subsidiary of Parent. In connection with the Merger, the Company filed its definitive proxy statement on Schedule 14A with the U.S. Securities and Exchange Commission (the “SEC”) on May 7, 2021 (as amended and supplemented, the “Proxy Statement”).

As previously disclosed, on August 27, 2021, outside legal counsel for each of the Company and Parent received a letter from the Department of Treasury on behalf of Committee on Foreign Investment in the United States (“CFIUS”) indicating that (i) CFIUS has identified risks to the national security of the United States arising as a result of the Merger, (ii) CFIUS has not identified any mitigation measures, including those proposed jointly by the Company and Parent, that CFIUS believes would adequately mitigate the identified risks, (iii) absent new information arising during the investigation period that alters CFIUS’s assessment of the national security risks or the feasibility of mitigation measures to resolve those risks, CFIUS anticipates that it will refer the matter to the President for decision, and (iv) the Company and Parent could provide additional information to CFIUS for consideration, including proposals to permanently mitigate the identified national security risks.

By letter dated September 10, 2021, the Company and Parent, through outside legal counsel, asked CFIUS to permit them to withdraw and re-file their June 11, 2021 notice concerning the Merger, in order to permit further discussion with CFIUS concerning potential options for permanently mitigating risks to the national security that have been identified by CFIUS. By letter dated September 13, 2021, the Acting CFIUS Staff Chairperson notified the parties that CFIUS had granted this request and that a new CFIUS review period for the Merger would commence on September 14, 2021 and conclude no later than October 28, 2021. On October 28, 2021, CFIUS may extend its review process by undertaking a 45-day investigation. There can be no assurance that the Company and Parent will develop or agree to any proposals that would result in CFIUS clearance.

Additional Information and Where to Find It

This communication is being made in respect of the proposed transaction involving the Company and Wise Road. In connection with the proposed transaction, the Company has filed relevant materials with the SEC, including the Proxy Statement. Promptly after filing the Proxy Statement with the SEC, the Company mailed the Proxy Statement and a proxy card to each shareholder of the Company entitled to vote at the special meeting relating to the proposed transaction. As announced in the Company’s Form 8-K filed with the SEC on June 16, 2021, the Company received the Interim Order from the U.S. Department of Treasury on behalf of CFIUS on June 15, 2021. In light of the Interim Order, the Company has postponed the special meeting relating to the proposed transaction, which was scheduled to be held at 8:00 p.m. Eastern time on June 17, 2021, pending further developments with respect to the Interim Order. This communication is not a substitute for the Proxy Statement or any other document that the Company may file with the SEC or send to its shareholders in connection with the proposed transaction. BEFORE MAKING ANY VOTING DECISION, SHAREHOLDERS OF MAGNACHIP ARE URGED TO READ THESE MATERIALS (INCLUDING ANY AMENDMENTS OR SUPPLEMENTS THERETO) AND ANY OTHER RELEVANT DOCUMENTS IN CONNECTION WITH THE PROPOSED TRANSACTION THAT MAGNACHIP WILL FILE WITH THE SEC WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT THE PROPOSED TRANSACTION AND THE PARTIES TO THE PROPOSED TRANSACTION. The Proxy Statement and other relevant materials in connection with

the proposed transaction, and any other documents filed by the Company with the SEC, may be obtained free of charge at the SEC’s website at www.sec.gov or at the Company’s website at www.magnachip.com.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: September 13, 2021