SCHEDULE 13D

MAGNACHIP SEMICONDUCTOR CORP

Common Stock, par value $0.01 per share · CUSIP: 55933J203

Event date: 2025-11-13

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Byreforge LLCReported CIK 0002096092

  Shares: 3,072,779.00 · Class: 8.5%

• Amoruso CristianoReported CIK 0002069371

  Shares: 3,072,779.00 · Class: 8.5%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.