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Public ownership evidence

Magnachip Semiconductor Corp. (MX) Ownership Disclosures

Read MX insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-11-07T14:03:26.246Z

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2026-09-252026-09-24LEE CHAEP20,000Not reported

First displayed source row from Recent Form 4 activity. The full bounded history and coverage notes remain below.

The displayed observation date is 2026-09-24 and its public availability date is 2026-09-25. Subtracting those calendar dates gives 1 day of disclosure lag. Historical public research can use the record from the availability date, rather than backdating knowledge to the observation date. The calendar-day difference does not assert an intraday publication time.

This row is code P: a purchase. A purchase code is only one eligibility check. Confirm reporting-owner role, amendment lineage and coverage before treating it as a strategy input.

Open the linked original receipts to verify the row, then inspect a second record before drawing a pattern. This public filing observation supplies source evidence, not a completed copy-trading return.

Recent Form 4 activity

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2026-09-252026-09-24LEE CHAEP20,000Not reported
2026-09-252026-09-23LEE CHAEP30,000Not reported
2026-09-252026-09-23LEE CHAEP50,000Not reported
2026-08-192026-08-15MARTINO CAMILLOA6,764Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

Inspect all 50 displayed rows: Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

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Federation des caisses Desjardins du Quebec2026-06-302026-08-15106,974$505,667None
Federation des caisses Desjardins du Quebec2026-06-302026-08-151,500$7,095None
Ameritas Advisory Services, LLC2026-06-302026-08-15946$4,475None
Owlhouse Capital LP2026-06-302026-08-1513,140$62,152None
NFSG Corp2026-06-302026-08-155,925$28,025None
XTX Topco Ltd2026-06-302026-08-15222,197$1,050,992None
FourWorld Capital Management LLC2026-06-302026-08-151,600,695$7,571,287None
Qube Research & Technologies Ltd2026-06-302026-08-15382,383$1,808,672None
Caption Management, LLC2026-06-302026-08-151,000,000$4,730,000Put
Caption Management, LLC2026-06-302026-08-15170,000$804,100Call
Caption Management, LLC2026-06-302026-08-15160,090$757,226None
OSAIC HOLDINGS, INC.2026-06-302026-08-157,193$34,022None
Squarepoint Ops LLC2026-06-302026-08-1567,450$319,039None
Trexquant Investment LP2026-06-302026-08-15285,909$1,352,350None
JANE STREET GROUP, LLC2026-06-302026-08-1517,287$81,768None
JANE STREET GROUP, LLC2026-06-302026-08-15198,590$939,331None
JANE STREET GROUP, LLC2026-06-302026-08-1577,500$366,575Put
JANE STREET GROUP, LLC2026-06-302026-08-15373,100$1,764,763Call
BOOTHBAY FUND MANAGEMENT, LLC2026-06-302026-08-15200,081$946,383None
HRT FINANCIAL LP2026-06-302026-08-1528,441$134,000None
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-15478,500$2,263,305Call
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-15215,400$1,018,842Put
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-15108,103$511,327None
SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC2026-06-302026-08-1519,066$90,182None
MILLENNIUM MANAGEMENT LLC2026-06-302026-08-15236,422$1,118,276None
MILLENNIUM MANAGEMENT LLC2026-06-302026-08-15161,000$761,530Call
JONES FINANCIAL COMPANIES LLLP2026-06-302026-08-151,000$4,650None
BLUEFIN CAPITAL MANAGEMENT, LLC2026-06-302026-08-1511,800$33,630Put
BLUEFIN CAPITAL MANAGEMENT, LLC2026-06-302026-08-1560,600$15,075Call
BLUEFIN CAPITAL MANAGEMENT, LLC2026-06-302026-08-15147,698$698,612None
ROYAL BANK OF CANADA2026-06-302026-08-15688$3,000None
BRIDGEWAY CAPITAL MANAGEMENT, LLC2026-06-302026-08-1546,141$218,247None
D. E. Shaw & Co., Inc.2026-06-302026-08-151,397,759$6,611,400None
CITADEL ADVISORS LLC2026-06-302026-08-15116,600$551,518Put
CITADEL ADVISORS LLC2026-06-302026-08-15110,890$524,510None
CITADEL ADVISORS LLC2026-06-302026-08-15150,400$711,392Call
CITADEL ADVISORS LLC2026-06-302026-08-15153$724None
FAIRFAX FINANCIAL HOLDINGS LTD/ CAN2026-06-302026-08-1562,500$296,250None
OAKTREE CAPITAL MANAGEMENT LP2026-06-302026-08-151,500,000$7,095,000None
OAKTREE CAPITAL MANAGEMENT LP2026-06-302026-08-151,000,000$4,730,000Call
GROUP ONE TRADING LLC2026-06-302026-08-15117,823$557,303None
NOMURA HOLDINGS INC2026-06-302026-08-151,000,000$4,730,000Call
TUDOR INVESTMENT CORP ET AL2026-06-302026-08-1585,100$402,523Call
TUDOR INVESTMENT CORP ET AL2026-06-302026-08-1575,103$355,237None
TWO SIGMA INVESTMENTS, LP2026-06-302026-08-151,501,438$7,101,802None
GOLDMAN SACHS GROUP INC2026-06-302026-08-1595,843$453,337None
BARCLAYS PLC2026-06-302026-08-1560,000$283,800None
VANGUARD PORTFOLIO MANAGEMENT LLC2026-06-302026-08-14239,694$1,133,753None
Rockefeller Capital Management L.P.2026-06-302026-08-1410,000$47,300None
Steward Partners Investment Advisory, LLC2026-06-302026-08-14153,347$725,331None

90-day public filing window, up to 50 source positions.

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

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Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.