What SEC filings does Magnachip Semiconductor Corporation submit to the SEC?

Magnachip Semiconductor Corporation (MX) submits several types of SEC filings including Form 4 (insider transactions), Form 144 (proposed insider sales), 8-K reports (material events such as earnings releases, acquisitions, leadership changes), and periodic reports — the 10-Q (quarterly) and 10-K (annual). All filings are publicly available through SEC EDGAR.

What does a Form 4 filing tell me about MX?

A Form 4 for MX discloses a transaction by a company insider — typically a director, officer, or 10%+ shareholder. It shows the source-reported date, number of shares, price, and updated ownership. These facts do not establish motive or predict future returns.

How do I interpret an 8-K filing from Magnachip Semiconductor Corporation?

An 8-K signals a material event requiring prompt disclosure. Common triggers include earnings pre-announcements, acquisitions, leadership appointments or departures, credit changes, or regulatory actions. Read the item codes inside the filing to understand exactly what was disclosed before drawing conclusions.

What is the difference between a 10-K and 10-Q for MX?

The 10-K is Magnachip Semiconductor Corporation's annual report with fully audited financial statements, comprehensive MD&A, and complete risk factor disclosures — filed 60–90 days after fiscal year-end. The 10-Q is a lighter quarterly report with unaudited financials filed for the first three quarters. Together they provide a continuous financial picture of the company.

Where can I see all MX SEC filings directly on EDGAR?

You can view all historical Magnachip Semiconductor Corporation filings on the SEC EDGAR company page for MX. Each filing card on this page links directly to the original SEC document.

How often does Magnachip Semiconductor Corporation file with the SEC?

Magnachip Semiconductor Corporation files one 10-K per year and up to three 10-Qs per year. Form 4 insider transactions must be reported within two business days of each trade, so the frequency depends on how often insiders are buying or selling MX shares. 8-K filings occur whenever a material event happens — which can be several times per quarter for an active company.

MX SEC Filing News — Magnachip Semiconductor Corporation

Latest SEC filings for Magnachip Semiconductor Corporation (MX) explained in plain English. Covers insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). StrongBuyAnalytics provides navigation and brief excerpts or summaries; original filings remain at the SEC/source links and were authored by their filers, not StrongBuyAnalytics. Filing dates shown are source dates. Coverage and detection can be delayed or incomplete because of SEC availability, amendments, parsing, caching, or outages. Latest source filing date shown: 2026-09-25.

Magnachip Semiconductor Corporation, together with its subsidiaries, designs, manufactures, and supplies analog and mixed-signal semiconductor platform solutions for communications, the Internet of Things, consumer, computing, industrial, and automotive applications. It provides display solutions, including source and gate drivers, and timing controllers that cover a range of flat panel displays used in mobile communications, automotive, entertainment devices, monitors, notebook PCs, tablet PC a…

Sector: Technology Industry: Semiconductors Market Cap: $190.9M CIK: 1325702

Total Filings

Bullish Classifications

Bearish Classifications

Insider Transactions

Material Events (8-K)

Periodic Reports

Rule-based classifications for MX currently lean bullish. Of the 20 displayed SEC filing records, 3 carry bullish classifications versus 0 bearish classifications. These labels summarize filing attributes; they are not recommendations, probabilities, or evidence of future price direction. There were 11 insider transactions (Form 4) in this period.

MX Filing Activity Snapshot 2026-03-16 — 2026-09-25

Insider Transactions (Form 4)

3 buys vs 0 sells

Net insider buying in this period — more purchases than sales reported.

Largest Form 144 Filing

$318.5K

LEE CHAE (Director, Chief Executive Officer) · 2026-09-25

100,000 shares · Form 4

8-K Item Codes Filed

Item 5.02: Departure / Election of Directors or Officers; Item 7.01: Regulation FD Disclosure; Item 9.01: Financial Statements and Exhibits

Item codes identify the type of material event disclosed (e.g. 2.02 = earnings results, 5.02 = executive change, 1.01 = material agreement).

Insider Transactions 11 · Forms 3, 4 and 5

A Form 4 is filed within two business days of a company insider — an officer, a director, or a holder of more than ten percent of the stock — changing their position in the shares. All 11 filings in this group are Form 4s for Magnachip Semiconductor Corporation.

The difficulty with reading these filings as a group is that a single form type covers transactions that mean entirely different things. An executive spending their own money to buy stock and an executive having shares withheld to pay tax on a vesting grant both appear as a Form 4. Every filing below is therefore tagged with the nature of the underlying transaction, taken from the transaction code reported on the form itself.

Across the 11 insider filings shown, the breakdown is 8 compensation award and 3 open-market purchase. 3 of them involved a discretionary open-market trade; the rest are compensation and administrative mechanics.

What each transaction type means

Compensation award ×8: Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.
Open-market purchase ×3: The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Form 4 Open-market purchase Insider Buying 2026-09-25

MX insider LEE CHAE (Director, Chief Executive Officer) bought 100,000 shares (~$318.5K)

LEE CHAE, listed as Director, Chief Executive Officer at MAGNACHIP SEMICONDUCTOR Corp, reported an open-market purchase of 100,000 MX shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`P`	Open-market purchase	50,000	$3.17	$158.5K
`P`	Open-market purchase	30,000	$3.19	$95.6K
`P`	Open-market purchase	20,000	$3.22	$64.4K

Filing: Form 4 (Insider Transaction) Insider: LEE CHAE (Director, Chief Executive Officer) Shares: 100,000 Est. Value: $318.5K

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-08-18

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

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

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	6,764	—	—

Filing: Form 4 (Insider Transaction) Insider: MARTINO CAMILLO (Director) Shares: 6,764

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-08-03

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

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

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	39,286	—	—

Filing: Form 4 (Insider Transaction) Insider: MARTINO CAMILLO (Director) Shares: 39,286

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-08-03

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.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	48,810	—	—

Filing: Form 4 (Insider Transaction) Insider: Chung Kyo-Hwa Liz (Director) Shares: 48,810

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-08-03

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.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	51,191	—	—

Filing: Form 4 (Insider Transaction) Insider: NATHAN GILBERT E (Director) Shares: 51,191

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-08-03

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.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	46,429	—	—

Filing: Form 4 (Insider Transaction) Insider: Amoruso Cristiano (Director) Shares: 46,429

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-07-06

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

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

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	288,750	—	—
`A`	Compensation award derivative · Stock Option (Right to Buy)	148,750	—	—

Filing: Form 4 (Insider Transaction) Insider: LEE CHAE (Director, Chief Executive Officer) Shares: 288,750

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-06-03

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

Park Shinyoung (Chief Financial Officer) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	112,500	—	—

Filing: Form 4 (Insider Transaction) Insider: Park Shinyoung (Chief Financial Officer) Shares: 112,500

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-06-03

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

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

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	30,000	—	—

Filing: Form 4 (Insider Transaction) Insider: Lee Seunghoon (Chief of Manufacturing) Shares: 30,000

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market purchase 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.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`P`	Open-market purchase	21,994	$2.87	$63.1K

Filing: Form 4 (Insider Transaction) Insider: NATHAN GILBERT E (Director) Shares: 21,994 Est. Value: $63.1K

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market purchase 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.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`P`	Open-market purchase	25,000	$2.75	$68.7K
`P`	Open-market purchase	13,006	$2.79	$36.2K

Filing: Form 4 (Insider Transaction) Insider: NATHAN GILBERT E (Director) Shares: 38,006 Est. Value: $104.9K

View on SEC EDGAR → Open Filing Document →

Material Events 6 · Form 8-K

An 8-K reports a material event in the window between scheduled reports. There are 6 in this period for Magnachip Semiconductor Corporation. Each 8-K names the item number it is filed under, and that number is the fastest way to tell a routine disclosure from a consequential one.

Item 2.02 is an earnings release, Item 5.02 is a change of directors or officers, and Item 1.01 or 2.01 covers a material agreement or a completed acquisition. Item 7.01 and Item 8.01 are the general-purpose disclosure items and carry no fixed meaning on their own.

The items reported in this period are: Item 5.02: Departure / Election of Directors or Officers; Item 7.01: Regulation FD Disclosure; Item 9.01: Financial Statements and Exhibits.

Form 8-K Material Company Update 2026-09-21

MX filed 8-K — material company event

MAGNACHIP SEMICONDUCTOR Corp filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

Form 8-K Material Company Update 2026-07-29

MX filed 8-K — material company event

MAGNACHIP SEMICONDUCTOR Corp filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

Form 8-K Leadership Change 2026-06-30

MX filed 8-K — Departure / Election of Directors or Officers

MAGNACHIP SEMICONDUCTOR Corp filed an 8-K with the SEC. Item 5.02: Departure / Election of Directors or Officers; Item 7.01: Regulation FD Disclosure; Item 9.01: Financial Statements and Exhibits. Filing excerpt: 8-K 1 mx-20260630.htm 8-K 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 26, 2026 Magnachip Semiconductor Corporation (Exact name of Registrant as specified in its charter) Delaware 001-34791 83-0406195 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.) c/o Magnachip Semiconductor, Ltd.…

Filing: 8-K (Material Event) Item 5.02: Departure / Election of Directors or Officers; Item 7.01: Regulation FD Disclosure; Item 9.01: Financial Statements and Exhibits

View on SEC EDGAR → Open Filing Document →

Form 8-K Material Company Update 2026-06-17

MX filed 8-K — material company event

MAGNACHIP SEMICONDUCTOR Corp filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

Form 8-K Material Company Update 2026-06-17

MX filed 8-K — material company event

MAGNACHIP SEMICONDUCTOR Corp filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

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. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

Periodic Reports 3 · Forms 10-K and 10-Q

The periodic reports are where the audited and reviewed financial statements live. This period contains 1 annual report (10-K) and 2 quarterly reports (10-Q) for Magnachip Semiconductor Corporation.

The two are not equivalent in weight. A 10-K is audited by an external firm and includes the full risk factor disclosure, business description and management discussion; a 10-Q is unaudited, reviewed rather than examined, and much shorter. When a figure in a quarterly report is later revised, the annual report is usually where the correction appears.

An amended report — 10-K/A or 10-Q/A — restates or corrects something in the original filing, and is worth reading against the version it replaces.

Form 10-Q Quarterly Report 2026-08-10

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)

View on SEC EDGAR → Open Filing Document →

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)

View on SEC EDGAR → Open Filing Document →

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)

View on SEC EDGAR → Open Filing Document →

How we classify Magnachip Semiconductor Corporation's filings

Straight from EDGAR

Each displayed record links to an original source document. StrongBuyAnalytics provides navigation and brief excerpts or summaries, not the filing itself. Parsing may omit context or contain errors, so read the original document in full.

Transaction codes, not guesswork

The nature shown on each insider filing comes from the transaction code the filer entered on the form itself — P for an open-market purchase, A for a compensation award, F for shares withheld to pay tax, M for an option exercise. Where one filing contains several codes, the transaction table lists them line by line.

Why the distinction matters

Insider activity is routinely summarised as buying or selling, which flattens together decisions that mean very different things. Shares withheld for tax on a vesting grant are an automatic administrative step; shares bought on the open market are someone committing their own money at the current price.

What this page does not tell you

A filing records what happened, not why. Form 4 does not always disclose whether a sale was executed under a pre-arranged Rule 10b5-1 plan, and no single filing is a basis for a decision on MX. Read these alongside the fundamentals rather than in isolation.

Frequently Asked Questions — MX SEC Filings

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Publisher, sources & limitations — September 15, 2026. StrongBuyAnalytics provides navigation and brief excerpts or summaries for educational use. Original filings remain at SEC EDGAR or other displayed source links; StrongBuyAnalytics does not author them. Filing dates are source dates, not publication dates for this page. Coverage can be delayed, incomplete, amended, or unavailable because of SEC/source availability, parsing, caching, or outages. Verify every material statement in the original filing.

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