Exhibit 99.1 Magnachip Reports Results for Fourth Quarter and Full-Year 2023 Announces successful design-wins with Smartphone Chinese OEMs Financial Highlights • Q4 revenue of $50.8 million was near the low-end of our guidance range. • Q4 gross profit margin was 22.7%, near the low-end of our guidance range. • Ended Q4 with no debt and cash of $158.1 million. • Repurchased approximately $8.2 million of stock during the quarter. • Full-year revenue of $230.1 million decreased 31.9% YoY. • Full-year gross pro ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-34791 Magnachip Semiconductor Corporation (Exact name of registrant as specified in its charter) Delaware 83-04061 ...

Magnachip Semiconductor (NYSE: MX) Q3 2023 Earnings Materials November 2, 2023 ...

Magnachip Semiconductor Corporation (NYSE:MX) Q3 2023 Earnings Conference Call November 2, 2023 5:00 PM ET Company Participants Yujia Zhai - MD, The Blueshirt Group Young-Joon Kim - CEO Shinyoung Park - CFO Conference Call Participants Suji Desilva - ROTH Capital Partners Operator Thank you for standing by and welcome to the Magnachip Semiconductor Corporation's Third Quarter 2023 Earnings Conference Call. At this time, all participants are in a listen-only mode. After the speakersÂ’ presentation, there wil ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-34791 Magnachip Semiconductor Corporation (Exact name of registrant as specified in its charter) Delaware 83-0406195 (S ...

Magnachip Semiconductor Corporation (NYSE:MX) Q2 2023 Earnings Conference Call August 7, 2023 5:00 PM ET Company Participants Yujia Zhai - Managing Director, The Blueshirt Group Young-Joon Kim - Director, Member of the Risk Committee and Chief Executive Officer Shinyoung Park - Chief Financial Officer Conference Call Participants Suji Desilva - ROTH Capital Partners Martin Yang - Oppenheimer Operator Good day, and thank you for standing by. Welcome to the Q2 2023 Magnachip Semiconductor Corporation Earnings ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ____________to_____________. Commission File Number: 001-34791 Magnachip Semiconductor Corporation (Exact name of registrant as specified in its charter) Delaware 83-040 ...

Magnachip Semiconductor Corporation (NYSE:MX) Q1 2023 Earnings Conference Call May 3, 2023 7:30 PM ET Company Participants Yujia Zhai - Investor Relations, The Blueshirt Group YJ Kim - Chief Executive Officer Conference Call Participants Nick Doyle - Needham Operator Good day, and thank you for standing by. Welcome to the First Quarter 2023 Magnachip Semiconductor Corporation Earnings Conference Call. At this time, all participants are in a listen-only mode. After this conference presentation, there will be ...

Magnachip Semiconductor (NYSE: MX) Q1 2023 Earnings Materials May 3, 2023 1 Forward-Looking Statements 2 Information in this presentation regarding Magnachip's forecasts, business outlook, expectations and beliefs 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 or incorporated by reference in this presentation, including expectations about estimated historical or future ope ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001-34791 Magnachip Semiconductor Corporation (Exact name of registrant as specified in its charter) Delaware 83-040619 ...