---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-054857"
form_type: "8-K/A"
ticker: "MX"
cik: "0001325702"
company_name: "MAGNACHIP SEMICONDUCTOR Corp"
filed_at: "2025-03-14T23:59:59+00:00"
generated_at: "2026-05-24T17:59:54.947941+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Magnachip Semiconductor dismisses Samil PWC, engages E&Y as FY2025 auditor

## Summary
- Audit Committee approved dismissal of Samil PWC effective upon filing of FY2024 10-K.
- Engaged Ernst & Young Han Young as independent auditor for FY2025, contingent on engagement letter.
- Samil PWC reports for FY2024 and FY2023 contained no adverse opinion or qualification.
- No disagreements or reportable events with Samil PWC during the relevant periods.
- Company received letter from Samil PWC agreeing with disclosures; filed as Exhibit 16.1.

## SEC filing metadata
- accession: 0001193125-25-054857
- form_type: 8-K/A
- ticker: MX
- cik: 0001325702
- company_name: MAGNACHIP SEMICONDUCTOR Corp
- filed_at: 2025-03-14T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1325702/000119312525054857/0001193125-25-054857-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1325702/000119312525054857/d935107d8ka.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-054857
- JSON: https://secwatch.observer/filing/0001193125-25-054857.json
- Plain text: https://secwatch.observer/filing/0001193125-25-054857.txt

## Key facts
- Auditor Changes
  MAGNACHIP SEMICONDUCTOR Corp engaged E&Y as its auditor.
  - Action: engagement
  - Auditor: E&Y
  source text: engagement of E&Y to serve as the Company’s independent registered public accounting firm, for the fiscal year ending December 31, 2025
  evidence_url: https://www.sec.gov/Archives/edgar/data/1325702/000119312525054857/0001193125-25-054857-index.htm
- Auditor Changes
  MAGNACHIP SEMICONDUCTOR Corp dismissed Samil PricewaterhouseCoopers as its auditor.
  - Action: dismissal
  - Auditor: Samil PricewaterhouseCoopers
  - Successor: E&Y
  source text: On March 11, 2025, the Audit Committee of the Company approved the dismissal of Samil PWC as the Company’s independent registered public accounting firm
  evidence_url: https://www.sec.gov/Archives/edgar/data/1325702/000119312525054857/0001193125-25-054857-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.