SEC filingsOct 12, 2026 to Oct 19, 2026: insiders reported 840 purchases and sales across 212 companies.840 insider purchases and sales in 7 daysSee the filings →
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Company profile

MX

Magnachip Semiconductor Corporation
NYSEInformation Technology

Latest close: 2.56 USD · Oct 16, 2026 · 1 year · split-adjusted

On the price, the facts of the public record■Insider buy□Insider sell◇Significant stake declared (13D)●Results filed
With an account, also○dividends▲splits◌next earningswith an account

End-of-day prices provided by Twelve Data · One close per session; the series does not update during the trading day.

Latest on record

The most recent facts, as filed.

Up to three of the most recent, checkable facts already loaded on this page, each linked to its source.

  1. Sep 24, 2026Reported purchase · Form 4CHAE LEE, Chief Executive Officer · $64.4KOpen the filing ↗
  2. Sep 23, 2026Reported purchase · Form 4CHAE LEE, Chief Executive Officer · $158.5KOpen the filing ↗
  3. Sep 23, 2026Reported purchase · Form 4CHAE LEE, Chief Executive Officer · $95.6KOpen the filing ↗

In numbers

What this profile holds, counted.

Closes · 1 year250
SEC filings on record89913 flagged findings
Reported transactions (Form 4)49since Jun 1, 2024 · and 12 other holdings
Corporate events (8-K)30since Apr 6, 2022

What the record says

Description, identity and filings, each with its source.

Every block cites its source. The colour of a finding marks its category — which document, who filed it — not how much it matters.

What the company does

Magnachip is a designer and manufacturer of analog and mixed-signal semiconductor platform solutions for communications, IoT, consumer, computing, industrial and automotive applications.

Source: Wikidata (CC0 1.0) · copied on Sep 3, 2026 · may not reflect recent changes.

SEC topics

Regulatory history

Topics detected in its SEC reports, with the original excerpt.

Each topic is assigned by a classifier over the full filing; the excerpts show where it was detected and are not always enough to verify it. Open the filing to read it in full.

  • 2026-05-08export control restrictionsrecentOpen filing ↗
    “…in the semiconductor industry, which are influenced by broader macroeconomic conditions, including inflation, interest rates,…”
    +1 more passage from the same document
    • “…production and could lead to delays or reduced demand across end markets, which may materially and adversely impact our business,…”
  • 2026-05-08capital return (buybacks/dividends)recentOpen filing ↗
    “…Cash outflow used in financing activities totaled $0.3 million for the three months ended March 31, 2026, compared to $1.5 million…”
    +1 more passage from the same document
    • “…to a payment of $0.2 million for the repurchase of our common stock to satisfy tax withholding obligations in connection with…”
  • 2026-03-16export control restrictionsrecentOpen filing ↗
    “…tax disputes more difficult and the final resolution of tax audits and any related litigation could differ from our historical…”
    +1 more passage from the same document
    • “…to operate in key international markets. Export restrictions may also affect our contractors, suppliers or customers, and we…”
  • 2026-03-16capital return (buybacks/dividends)recentOpen filing ↗
    “…expenditures and management time and expose us to liability for violations. • Our business depends on international customers,…”
    +1 more passage from the same document
    • “…against the public company. Regardless of its outcome, this type of litigation could result in substantial costs to us and a…”

Original excerpts from SEC filings, untranslated. Not advice and not a prediction.

SEC record

SEC dossier

What this company has filed with the SEC, in plain language.

The 25 most recent filings (of 899)

Everything filed

Every SEC filing, newest first, with what it is. Below, each type with its own explanation.

  • Oct 14, 26424B3 ↗Securities offering new
  • Oct 5, 26S-3 ↗Securities offering
  • Sep 25, 26Form 4 ↗Insider transaction
  • Sep 21, 268-K ↗Current report · Entered a material agreement
  • Aug 18, 26Form 4 ↗Insider transaction
  • Aug 10, 2610-Q ↗Quarterly report
  • Insider transaction · 4 Form 4 filingsshow all 4hide
  • Jul 29, 268-K ↗Current report · Results
  • Jul 6, 26Form 4 ↗Insider transaction
  • Jul 6, 26Form 3 ↗Insider transaction
  • Jun 30, 268-K ↗Current report · A senior executive left or was appointed
  • Jun 17, 268-K ↗Current report · Entered a material agreement
  • Jun 17, 26424B5 ↗Securities offering
  • Jun 17, 26424B3 ↗Securities offering
  • Jun 17, 268-K ↗Current report · A senior executive left or was appointed
  • Jun 12, 26CORRESP ↗Correspondence with the SEC
  • Jun 12, 26S-3 ↗Securities offering
  • Jun 11, 26UPLOAD ↗Correspondence with the SEC
  • Insider transaction · 2 Form 4 filingsshow all 2hide
  • May 8, 2610-Q ↗Quarterly report
  • Apr 30, 26DEF 14A ↗Shareholder meeting and votes

899 filings on record, the oldest from Jun 21, 05.

Listing the 25 most recent filings of the 899 on record.

8-Ks, explained

Stress19Structure45Governance55
  • Sep 21, 26StructureEntered a material agreement+3 more in the same filing8-K 1.01 ↗
  • Jun 30, 26GovernanceA senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
  • Jun 17, 26StructureEntered a material agreement+1 more in the same filing8-K 1.01 ↗
  • Governance7 senior executive changes2025 – 2026show all 7hide
    • Jun 17, 26GovernanceA senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
    • Jan 20, 26GovernanceA senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
    • Jan 14, 26GovernanceA senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗
    • Oct 3, 25GovernanceA senior executive left or was appointed+1 more in the same filing8-K/A 5.02 ↗
    • Sep 9, 25GovernanceA senior executive left or was appointed+1 more in the same filing8-K/A 5.02 ↗
    • Aug 11, 25GovernanceA senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
    • May 23, 25GovernanceA senior executive left or was appointed8-K 5.02 ↗
  • May 13, 25StressRestructuring plan with committed costs8-K/A 2.05 ↗
  • Apr 30, 25GovernanceA senior executive left or was appointed8-K 5.02 ↗
  • Apr 8, 25StressRestructuring plan with committed costs+2 more in the same filing8-K 2.05 ↗
  • Mar 14, 25GovernanceAuditor change filing (8-K Item 4.01)+1 more in the same filing8-K/A 4.01 ↗
  • Mar 14, 25GovernanceAuditor change filing (8-K Item 4.01)+1 more in the same filing8-K 4.01 ↗
  • Dec 19, 24StructureEntered a material agreement+1 more in the same filing8-K 1.01 ↗
  • Jul 31, 24GovernanceA senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗
  • Mar 29, 24StructureEntered a material agreement+1 more in the same filing8-K 1.01 ↗

9 older filings not shown · The record reaches back to Jan 25, 06.

Notable in the record

Stress disclosures older than the timeline above. They are individual events from the record, not a complete timeline: there may be more between them.

  • Jan 7, 22StressListing notice (8-K 3.01)8-K 3.01 ↗
  • Feb 23, 17StressRestructuring plan with committed costs8-K 2.05 ↗
  • May 5, 16StressRestructuring plan with committed costs8-K/A 2.05 ↗
  • Apr 4, 16StressRestructuring plan with committed costs8-K 2.05 ↗
  • May 4, 15StressA debt obligation was accelerated+3 more in the same filing8-K 2.04 ↗
  • Apr 17, 15StressRestructuring plan with committed costs+1 more in the same filing8-K/A 2.05 ↗
  • Mar 11, 14StressPast accounts declared unreliable and being restated+4 more in the same filing8-K 4.02 ↗
  • Jul 31, 06StressWrite-down of assets+3 more in the same filing8-K 2.06 ↗

The full record holds 19 stress filings.

Corporate events are tracked from 2004-08-23, when the SEC renumbered 8-K items. Earlier filings use an incompatible numbering and are not classified here.

Ownership and control

Schedule 13D: stake and stated purpose

Filed by holders above 5% of a share class who cannot use the short form. It includes the investor's stated purpose: read it before assuming they seek influence.

  • Byreforge LLC8.5%Jan 14, 26SCHEDULE 13D/A ↗2 co-filers on this document — the figure is the largest single stake, not their sum. · 1 earlier filing

Schedule 13G: short-form filing

The short form, for holders who meet specific requirements: institutional investors, passive investors without a control purpose, or exempt investors. Asset managers and index funds usually file it.

  • SYSTEMATIC FINANCIAL MANAGEMENT LP5.3%Dec 31, 24SCHEDULE 13G ↗
  • TORO 18 HOLDINGS LLC4.1%Mar 20, 26SCHEDULE 13G/A ↗4 co-filers on this document — the figure is the largest single stake, not their sum. · 1 earlier filing
  • Clearline Capital LP4.1%Dec 31, 25SCHEDULE 13G/A ↗3 co-filers on this document — the figure is the largest single stake, not their sum. · 1 earlier filing

Structured 13D/G data starts 2023-12, when the SEC moved these filings to a machine-readable format. Earlier filings exist but are not parsed here.

SEC record

Insider transactions

Buys and sells reported by officers, directors and major shareholders on SEC Form 4.

Buys and sells

  • Sep 24, 26Buy$64KCHAE LEEChief Executive Officer↗
  • Sep 23, 26Buy$159KCHAE LEEChief Executive Officer↗
  • Sep 23, 26Buy$96KCHAE LEEChief Executive Officer↗
  • Mar 16, 26Buy$63KGILBERT E NATHAN↗
  • Mar 13, 26Buy$36KGILBERT E NATHAN↗
  • Mar 12, 26Buy$69KGILBERT E NATHAN↗
  • Aug 25, 25Buy$29KShin Young ParkSee Remarks↗
  • Aug 22, 25Buy$85KCAMILLO MARTINOSee Remarks↗
  • Mar 14, 25Buy$77KIlbok Lee↗
  • Mar 13, 25Buy$74KGILBERT E NATHAN↗
Stock compensation, tax and giftsshow the 30 other transactionshide

Stock compensation, tax withholding, option exercises and gifts. They are listed separately and are not included in the purchase and sale totals. The type describes the transaction, not the filer's intent.

  • Aug 15, 26Compensationamount n/aCAMILLO MARTINO↗
  • Aug 1, 26Compensationamount n/aCristiano Amoruso↗
  • Aug 1, 26Compensationamount n/aGILBERT E NATHAN↗
  • Aug 1, 26Compensationamount n/aKyo-Hwa Liz Chung↗
  • Aug 1, 26Compensationamount n/aCAMILLO MARTINO↗
  • Jul 1, 26Compensationamount n/aCHAE LEEChief Executive Officer↗
  • Jun 1, 26Compensationamount n/aSeunghoon LeeChief of Manufacturing↗
  • Jun 1, 26Compensationamount n/aShinyoung ParkChief Financial Officer↗
  • Feb 15, 26Compensationamount n/aCristiano Amoruso↗
  • Feb 15, 26Compensationamount n/aKyo-Hwa Liz Chung↗
  • Feb 15, 26Compensationamount n/aGILBERT E NATHAN↗
  • Dec 31, 25Tax$16KShin Young ParkSee Remarks↗
  • Dec 31, 25Tax$31KShin Young ParkSee Remarks↗
  • Dec 31, 25Tax$46KShin Young ParkSee Remarks↗
  • Dec 31, 25Compensation$18KSeunghoon LeeSee Remarks↗
  • Dec 31, 25Tax$8KSeunghoon LeeSee Remarks↗
  • Dec 31, 25Tax$7KSeunghoon LeeSee Remarks↗
  • Dec 31, 25Tax$12KSeunghoon LeeSee Remarks↗
  • Dec 31, 25Tax$12KSeunghoon LeeSee Remarks↗
  • Nov 15, 25Compensationamount n/aGILBERT E NATHAN↗
  • Nov 15, 25Compensationamount n/aKyo-Hwa Liz Chung↗
  • Oct 1, 25Compensationamount n/aCAMILLO MARTINOSee Remarks↗
  • Aug 15, 25Compensationamount n/aSeunghoon LeeSee Remarks↗
  • Jul 1, 25Compensationamount n/aKyo-Hwa Liz Chung↗
  • Jul 1, 25Compensationamount n/aGILBERT E NATHAN↗
  • Jul 1, 25Compensationamount n/aCAMILLO MARTINO↗
  • Jul 1, 25Compensationamount n/aIlbok Lee↗
  • Jun 15, 25Other$61KKyo-Hwa Liz Chung↗
  • Jun 1, 25Compensationamount n/aShin Young ParkSee Remarks↗
  • Jun 1, 25Compensationamount n/aYoung-Joon KimSee Remarks↗

The full record holds 121 transactions and goes back to Dec 31, 22.

Its sector and its market

Magnachip Semiconductor Corporation among Information Technology companies

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Coverage

What sits behind this page.

Where each figure comes from and how far it reaches.

Prices
End-of-day closes provided by Twelve Data. One close per session; not real time. Closes adjusted for splits.
Series quality
250 clean closes in the period.
SEC records
899 documents on file, from Jun 21, 2005 to Oct 14, 2026.
Company description
Wikidata, read on Sep 3, 2026.
This page
Generated on Oct 19, 2026; refreshed through the day.

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Which SEC documents appear here?

Those filed with the SEC by the company, its insiders and its major shareholders, within our coverage: periodic reports (10-K, 10-Q, 20-F), material events (8-K), proposed sale notices (Form 144), insider transactions (Form 4) and stakes above 5% (13D/13G). Each links to the original on EDGAR.

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