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MX SEC Filing News — Magnachip Semiconductor Corporation

Latest SEC filings for Magnachip Semiconductor Corporation (MX) explained in plain English: insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). Sourced directly from SEC EDGAR.

What you’re looking at: Each item below is parsed from an actual SEC filing. Form 4 = confirmed insider transaction · Form 144 = proposed sale notice · 8-K = material event (earnings, M&A, leadership change, etc.) · 10-Q / 10-K = quarterly / annual report.
Form 10-Q Quarterly Report 2026-05-08

MX filed Quarterly Report (10-Q)

MAGNACHIP SEMICONDUCTOR Corp filed its quarterly report with the SEC. This report includes unaudited financial statements and management discussion for the quarter.

Filing: 10-Q (Quarterly Report)
Form 8-K Material Company Update 2026-04-28

MX filed 8-K — material company event

MAGNACHIP SEMICONDUCTOR Corp filed an 8-K with the SEC reporting a material event. Filing excerpt: XBRL Viewer

Filing: 8-K (Material Event)
Form 4 Insider Buying 2026-03-17

MX insider NATHAN GILBERT E (Director) bought 21,994 shares (~$63.1K)

NATHAN GILBERT E, listed as Director at MAGNACHIP SEMICONDUCTOR Corp, reported an open-market purchase of 21,994 MX shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

Filing: Form 4 (Insider Transaction) Insider: NATHAN GILBERT E (Director) Shares: 21,994 Est. Value: $63.1K
Form 10-K Annual Report 2026-03-16

MX filed Annual Report (10-K)

MAGNACHIP SEMICONDUCTOR Corp filed its annual report with the SEC. This report includes audited financial statements, business overview, risk factors, and management discussion.

Filing: 10-K (Annual Report)
Form 4 Insider Buying 2026-03-16

MX insider NATHAN GILBERT E (Director) bought 38,006 shares (~$104.9K)

NATHAN GILBERT E, listed as Director at MAGNACHIP SEMICONDUCTOR Corp, reported an open-market purchase of 38,006 MX shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

Filing: Form 4 (Insider Transaction) Insider: NATHAN GILBERT E (Director) Shares: 38,006 Est. Value: $104.9K
Form 8-K Material Company Update 2026-03-04

MX filed 8-K — material company event

MAGNACHIP SEMICONDUCTOR Corp filed an 8-K with the SEC reporting a material event. Filing excerpt: XBRL Viewer

Filing: 8-K (Material Event)
Form 4 Tax / Compensation Filing 2026-02-17

MX insider Form 4 filed for equity award, exercise, or tax withholding

NATHAN GILBERT E (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: NATHAN GILBERT E (Director) Shares: 1,478
Form 4 Tax / Compensation Filing 2026-02-17

MX insider Form 4 filed for equity award, exercise, or tax withholding

Chung Kyo-Hwa Liz (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: Chung Kyo-Hwa Liz (Director) Shares: 2,946
Form 4 Tax / Compensation Filing 2026-02-17

MX insider Form 4 filed for equity award, exercise, or tax withholding

Amoruso Cristiano (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: Amoruso Cristiano (Director) Shares: 28,628
Form 8-K Material Company Update 2026-01-20

MX filed 8-K — material company event

MAGNACHIP SEMICONDUCTOR Corp filed an 8-K with the SEC reporting a material event. Filing excerpt: XBRL Viewer

Filing: 8-K (Material Event)
Form 8-K Material Company Update 2026-01-14

MX filed 8-K — material company event

MAGNACHIP SEMICONDUCTOR Corp filed an 8-K with the SEC reporting a material event. Filing excerpt: XBRL Viewer

Filing: 8-K (Material Event)
Form 4 Tax / Compensation Filing 2026-01-02

MX insider Form 4 filed for equity award, exercise, or tax withholding

Lee Seunghoon (See Remarks) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: Lee Seunghoon (See Remarks) Shares: 53,502
Form 4 Tax / Compensation Filing 2026-01-02

MX insider Form 4 filed for equity award, exercise, or tax withholding

Park Shin Young (See Remarks) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: Park Shin Young (See Remarks) Shares: 36,332
Form 4 Tax / Compensation Filing 2025-11-17

MX insider Form 4 filed for equity award, exercise, or tax withholding

Chung Kyo-Hwa Liz (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: Chung Kyo-Hwa Liz (Director) Shares: 3,160
Form 4 Tax / Compensation Filing 2025-11-17

MX insider Form 4 filed for equity award, exercise, or tax withholding

NATHAN GILBERT E (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: NATHAN GILBERT E (Director) Shares: 6,320
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