Form 4 for MX MAGNACHIP SEMICONDUCTOR Corp
Accepted 2026-01-02 00:00:00 ET · period of report 2025-08-15 · accession 0001193125-26-000936 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DM | 2026-01-02 | 2025-08-15+ | MX | Lee Seunghoon | See Remarks | A - Grant | $0.4728 | +37.8K | 137.0K | +38% | +$17.9K |
| DM | 2026-01-02 | 2025-12-31 | MX | Lee Seunghoon | See Remarks | F - Tax | $2.55 | -15.8K | 133.1K | -11% | -$40.2K |
| D | 2026-01-02 | 2025-08-15 | MX | Lee Seunghoon | See Remarks | A - Grant | $0.00 | +15.4K | 15.4K | New | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2025-12-31 | A | A | 7,000 | $2.55 | 143,953 | D | — | — | (F1) This transaction reflects shares of common stock issued in connection with the vesting of financial performance-based restricted stock units granted on June 1, 2024. |
| 2 | Common | Common Stock | 2025-12-31 | F | D | 3,333 | $2.55 | 140,620 | D | — | — | (F2) This transaction represents the withholding by the Issuer of 3,333 shares of common stock to satisfy tax withholding obligations incurred by the Reporting Person upon the vesting of 7,000 shares of common stock originally awarded to the Reporting Person on June 1, 2024. |
| 3 | Common | Common Stock | 2025-12-31 | F | D | 2,778 | $2.55 | 137,842 | D | — | — | (F3) This transaction represents the withholding by the Issuer of 2,778 shares of common stock to satisfy tax withholding obligations incurred by the Reporting Person upon the vesting of 5,834 shares of common stock originally awarded to the Reporting Person on March 23, 2023. |
| 4 | Common | Common Stock | 2025-12-31 | F | D | 4,880 | $2.55 | 128,201 | D | — | — | (F5) This transaction represents the withholding by the Issuer of 4,880 shares of common stock to satisfy tax withholding obligations incurred by the Reporting Person upon the vesting of 10,250 shares of common stock originally awarded to the Reporting Person on August 15, 2025. |
| 5 | Common | Common Stock | 2025-08-15 | A | A | 30,750 | $0.00 | 136,953 | D | — | — | |
| 6 | Common | Common Stock | 2025-12-31 | F | D | 4,761 | $2.55 | 133,081 | D | — | — | (F4) This transaction represents the withholding by the Issuer of 4,761 shares of common stock to satisfy tax withholding obligations incurred by the Reporting Person upon the vesting of 10,000 shares of common stock originally awarded to the Reporting Person on June 1, 2024. |
| 7 | Derivative | Performance-Based Restricted Stock Units | 2025-08-15 | A | A | 15,375 | $0.00 | 15,375 | D | — · — to 2028-01-31 | 15,375 Common Stock | (F6) Each Performance-Based Restricted Stock Units ("PRSUs") represents a contingent right to receive one share of Issuer's common stock. (F7) Reflects a number of shares of Issuer common stock that the Reporting Person would receive upon vesting and settlement of the PRSUs at the target level of performance, provided that the actual number of PRSUs that would become eligible to vest range from 0% to 100% of the target number of PRSUs based on actual achievement. The PRSUs vest upon Issuer's common stock achieving a specified price per share. |