UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 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): June 24, 2013

MagnaChip Semiconductor Corporation

(Exact name of Registrant as specified in its charter)

Registrant’s telephone number, including area code: (352) 45-62-62

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:

Beginning on June 24, 2013, management of MagnaChip Semiconductor Corporation (the “Company”) intends to conduct certain investor meetings. A copy of the investor presentation dated June 2013 expected to be used at such meetings has been posted on the Company’s website under the investor relations tab at http://www.magnachip.com.

During such meetings, management of the Company expects to reaffirm the Company’s previously reported guidance for the second fiscal quarter ending June 30, 2013, that the Company expects that revenue will be in the range of $210 million to $220 million, and gross margin will be 32.0% to 34.0% as a percent of revenue.

The information contained in this Item 7.01 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any registration statement or other filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in any such filing.

Safe Harbor for Forward-Looking Statements

Information in this Current Report on Form 8-K regarding the Company’s forecasts, business outlook, expectations and beliefs, including second quarter 2013 revenue and gross margin guidance, are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 that involve risks and uncertainties. All forward-looking statements included herein are based upon information available to the Company as of the date of this Current Report, which may change, and we assume no obligation to update any such forward-looking statements. These statements are not guarantees of future performance and actual results could differ materially from our current expectations. Factors that could cause or contribute to such differences include general economic conditions, the impact of competitive products and pricing, timely design acceptance by our customers, timely introduction of new products and technologies, ability to ramp new products into volume production, industry wide shifts in supply and demand for semiconductor products, industry and/or company overcapacity, effective and cost efficient utilization of manufacturing capacity, financial stability in foreign markets and the impact of foreign exchange rates, unanticipated costs and expenses or the inability to identify expenses which can be eliminated, compliance with U.S. and international trade and export laws and regulations by us and our distributors, and other risks detailed from time to time in the Company’s filings with the SEC, including our Quarterly Report on Form 10-Q filed on May 3, 2013 and subsequent registration statements, amendments or other reports that we may file from time to time with the SEC and/or make available on our website. The Company assumes no obligation and does not intend to update the forward-looking statements provided, whether as a result of new information, future events or otherwise.

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.