MAGNACHIP SEMICONDUCTOR CORP MX
COM · Common Stock · CUSIP 55933J203 · ISIN US55933J2033
Magnachip is a designer and manufacturer of analog and mixed-signal semiconductor platform solutions for communications, IoT, consumer, computing, industrial and automotive applications.
- SectorTechnology
- IndustrySemiconductors & Related Devices
- HeadquartersNorth Chungcheong, South Korea
- Founded2004
- Websitemagnachip.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Shares outstanding: 36.5m as of 2026-07-31, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $4.73. Options: 14 managers hold calls ($21.1m notional), 9 hold puts ($9.7m).
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 129 |
| Q4 2022 | 119 |
| Q1 2023 | 117 |
| Q2 2023 | 116 |
| Q3 2023 | 118 |
| Q4 2023 | 124 |
| Q1 2024 | 104 |
| Q2 2024 | 90 |
| Q3 2024 | 89 |
| Q4 2024 | 83 |
| Q1 2025 | 89 |
| Q2 2025 | 92 |
| Q3 2025 | 75 |
| Q4 2025 | 69 |
| Q1 2026 | 71 |
| Q2 2026 | 76 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2024 | 33 | 40 |
| Q4 2024 | 32 | 40 |
| Q1 2025 | 31 | 42 |
| Q2 2025 | 42 | 38 |
| Q3 2025 | 30 | 46 |
| Q4 2025 | 25 | 43 |
| Q1 2026 | 32 | 33 |
| Q2 2026 | 47 | 40 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $53.4k | $56.8k | 1.06 |
| Q4 2025 | $75.5k | $143.6k | 1.90 |
| Q1 2026 | $99.4k | $105.6k | 1.06 |
| Q2 2026 | $21.1m | $9.7m | 0.46 |
Biggest buyers
| D. E. Shaw & Co., Inc. | Added | +1.2m |
| TWO SIGMA INVESTMENTS, LP | Added | +929.6k |
| RENAISSANCE TECHNOLOGIES LLC | Added | +626.1k |
| Qube Research & Technologies Ltd | New | +382.4k |
| MARSHALL WACE, LLP | Added | +370.9k |
| ACADIAN ASSET MANAGEMENT LLC | Added | +317.1k |
| Connor, Clark & Lunn Investment Management Ltd. | Added | +316.1k |
| Trexquant Investment LP | New | +285.9k |
| XTX Topco Ltd | New | +222.2k |
| JANE STREET GROUP, LLC | Added | +166.1k |
Biggest sellers
| AMERIPRISE FINANCIAL INC | Sold out | -1.6m |
| IMMERSION CORP | Sold out | -1.4m |
| OAKTREE CAPITAL MANAGEMENT LP | Reduced | -1.3m |
| Clearline Capital LP | Sold out | -1.1m |
| FIRST WILSHIRE SECURITIES MANAGEMENT INC | Sold out | -744.0k |
| STATE OF WISCONSIN INVESTMENT BOARD | Sold out | -557.6k |
| PRELUDE CAPITAL MANAGEMENT, LLC | Sold out | -403.6k |
| Potomac Capital Management, Inc. | Sold out | -365.0k |
| BlackRock, Inc. | Reduced | -195.2k |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | Reduced | -187.8k |
Biggest calls
| OAKTREE CAPITAL MANAGEMENT LP | New | $4.7m1.0m shares |
| NOMURA HOLDINGS INC | New | $4.7m1.0m shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $2.3m478.5k shares |
| PEAK6 LLC | New | $1.9m400.0k shares |
| JANE STREET GROUP, LLC | New | $1.8m373.1k shares |
| GROUP ONE TRADING LLC | Added | $1.2m259.7k shares |
| SIMPLEX TRADING, LLC | Added | $1.2m256.4k shares |
| Caption Management, LLC | New | $804.1k170.0k shares |
| MILLENNIUM MANAGEMENT LLC | New | $761.5k161.0k shares |
| CITADEL ADVISORS LLC | Added | $711.4k150.4k shares |
Biggest puts
| Caption Management, LLC | New | $4.7m1.0m shares |
| HRT FINANCIAL LP | New | $2.4m500.0k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $1.0m215.4k shares |
| CITADEL ADVISORS LLC | New | $551.5k116.6k shares |
| GROUP ONE TRADING LLC | Added | $379.8k80.3k shares |
| JANE STREET GROUP, LLC | New | $366.6k77.5k shares |
| IMC-Chicago, LLC | New | $200.6k42.4k shares |
| SIMPLEX TRADING, LLC | Added | $50.6k10.7k shares |
| BLUEFIN CAPITAL MANAGEMENT, LLC | New | $33.6k11.8k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
Byreforge LLC
13D · may seek influence
no change · filed 2026-01-20
Stated purposeItem 4 is hereby amended to add the following: On January 14, 2026, the Board appointed Cristiano Amoruso as a director of the Issuer to serve until the Issuer's 2026 Annual Meeting of Stockholders or until his successor has been duly elected and qualified, or until his earlier death, resignation, retirement, disqualification or removal. Mr. Amoruso has also been appointed to each of the Audit Committee, the Compensation Committee and the Nominating and Corporate Governance Committee of the Board. Full filing |
8.5% |
| TORO 18 HOLDINGS LLC 13G · passive investor new · filed 2025-01-02 | 8.0% |
Fell to 5% or below in the last year: IMMERSION CORP (4.1%, 2026-03-20), Clearline Capital LP (4.1%, 2026-02-17), SYSTEMATIC FINANCIAL MANAGEMENT LP (0.0%, 2026-02-11)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 3 | $224.0k | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
| Q3 2025 | 2 | $113.9k | 0 | — | — |
| Q4 2025 | 0 | — | 0 | — | — |
| Q1 2026 | 1 | $168.2k | 0 | — | — |
| Q2 2026 | 0 | — | 0 | — | — |
| Q3 2026 | 1 | $318.6k | 0 | — | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-09-24 | LEE CHAE Chief Executive Officer, director | Bought | $64.4k20.0k shares |
| 2026-09-23 | LEE CHAE Chief Executive Officer, director | Bought | $254.2k80.0k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| MARSHALL WACE, LLP 0.01% of their portfolio | 1.6m $7.6m | Added +370.9k |
| FourWorld Capital Management LLC 9.66% of their portfolio | 1.6m $7.6m | Reduced -57.0k |
| TWO SIGMA INVESTMENTS, LP 0.01% of their portfolio | 1.5m $7.1m | Added +929.6k |
| OAKTREE CAPITAL MANAGEMENT LP 0.13% of their portfolio | 1.5m $7.1m | Reduced -1.3m |
| D. E. Shaw & Co., Inc. 0.00% of their portfolio | 1.4m $6.6m | Added +1.2m |
| ACADIAN ASSET MANAGEMENT LLC 0.01% of their portfolio | 963.8k $4.5m | Added +317.1k |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 661.6k $3.1m | Added +626.1k |
| MORGAN STANLEY 0.00% of their portfolio | 544.1k $2.6m | Reduced -166.3k |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 475.6k $2.2m | Reduced -73.5k |
| Connor, Clark & Lunn Investment Management Ltd. 0.00% of their portfolio | 412.8k $2.0m | Added +316.1k |
| Qube Research & Technologies Ltd 0.00% of their portfolio | 382.4k $1.8m | New |
| Trexquant Investment LP 0.01% of their portfolio | 285.9k $1.4m | New |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 265.1k $1.3m | Reduced -64.2k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio | 239.7k $1.1m | Unchanged |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 236.4k $1.1m | Reduced -56.5k |
| XTX Topco Ltd 0.01% of their portfolio | 222.2k $1.1m | New |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 215.9k $1.0m | Added +166.1k |
| ODDO BHF ASSET MANAGEMENT SAS 0.05% of their portfolio | 215.1k $1.0m | Unchanged |
| BOOTHBAY FUND MANAGEMENT, LLC 0.02% of their portfolio | 200.1k $946.4k | Reduced -7.1k |
| GSA CAPITAL PARTNERS LLP 0.06% of their portfolio | 200.0k $946.0k | Reduced -80.7k |
| Caption Management, LLC 0.03% of their portfolio | 160.1k $757.2k | New |
| Steward Partners Investment Advisory, LLC 0.00% of their portfolio | 153.3k $725.3k | Reduced -43.7k |
| BLUEFIN CAPITAL MANAGEMENT, LLC 0.20% of their portfolio | 147.7k $698.6k | New |
| GROUP ONE TRADING LLC 0.02% of their portfolio | 117.8k $557.3k | Added +94.2k |
| Virtu Financial LLC 0.02% of their portfolio | 115.0k $544.0k | New |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 111.0k $525.2k | Added +23.0k |
| ALGERT GLOBAL LLC 0.01% of their portfolio | 110.8k $524.0k | Added +52.1k |
| UBS Group AG 0.00% of their portfolio | 110.3k $521.9k | Reduced -73.1k |
| Federation des caisses Desjardins du Quebec 0.00% of their portfolio | 108.5k $512.8k | Added +84.0k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 108.1k $511.3k | Added +83.8k |
| SILVERBACK ASSET MANAGEMENT LLC 0.06% of their portfolio | 100.0k $473.0k | Reduced -120.0k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 95.8k $453.3k | Reduced -104.8k |
| TUDOR INVESTMENT CORP ET AL 0.00% of their portfolio | 75.1k $355.2k | New |
| AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio | 73.7k $348.6k | Added +1.1k |
| IMC-Chicago, LLC 0.00% of their portfolio | 67.9k $321.2k | New |
| Squarepoint Ops LLC 0.00% of their portfolio | 67.5k $319.0k | New |
| FAIRFAX FINANCIAL HOLDINGS LTD/ CAN 0.01% of their portfolio | 62.5k $296.2k | Reduced -62.5k |
| Eurizon Capital SGR S.p.A. 0.00% of their portfolio | 61.0k $281.9k | Reduced -10.0k |
| BARCLAYS PLC 0.00% of their portfolio | 60.0k $283.8k | Added +54.2k |
| Polunin Capital Partners Ltd 0.06% of their portfolio | 59.8k $240.0k | Added +2.8k |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 46.1k $218.2k | Reduced -187.8k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 38.6k $178.3k | Reduced -87.7k |
| WINTON GROUP Ltd 0.01% of their portfolio | 34.7k $164.0k | New |
| Yakira Capital Management, Inc. 0.05% of their portfolio | 34.7k $164.0k | Reduced -63.3k |
| WESBANCO BANK INC 0.00% of their portfolio | 30.0k $141.9k | New |
| STATE STREET CORP 0.00% of their portfolio | 28.7k $135.7k | Added +295 |
| HRT FINANCIAL LP 0.00% of their portfolio | 28.4k $134.0k | Added +9.3k |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 27.6k $130.8k | Added +27.2k |
| CITIGROUP INC 0.00% of their portfolio | 23.2k $109.8k | New |
| GABELLI & Co INVESTMENT ADVISERS, INC. 0.02% of their portfolio | 22.5k $106.4k | Reduced -55.0k |
| GABELLI FUNDS LLC 0.00% of their portfolio | 21.7k $102.5k | Reduced -95.1k |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC 0.00% of their portfolio | 19.1k $90.2k | New |
| AXQ CAPITAL, LP 0.01% of their portfolio | 18.2k $86.1k | Reduced -14.2k |
| LPL Financial LLC 0.00% of their portfolio | 17.7k $83.7k | Added +5.8k |
| FOX RUN MANAGEMENT, L.L.C. 0.01% of their portfolio | 16.5k $77.9k | New |
| Accurate Wealth Management, LLC 0.01% of their portfolio | 15.0k $60.3k | New |
| BlackRock, Inc. 0.00% of their portfolio | 13.4k $63.3k | Reduced -195.2k |
| Owlhouse Capital LP 0.10% of their portfolio | 13.1k $62.2k | New |
| Caitong International Asset Management Co., Ltd 0.01% of their portfolio | 13.1k $61.9k | Added +13.1k |
| C2P Capital Advisory Group, LLC d.b.a. Prosperity Capital Advisors 0.00% of their portfolio | 11.5k $54.3k | New |
| StoneX Group Inc. 0.00% of their portfolio | 10.6k $57.5k | New |
| Centiva Capital, LP 0.00% of their portfolio | 10.6k $50.0k | Reduced -32.8k |
| Walleye Capital LLC 0.00% of their portfolio | 10.5k $49.8k | New |
| Rockefeller Capital Management L.P. 0.00% of their portfolio | 10.0k $47.3k | New |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 7.2k $34.0k | Unchanged |
| NFSG Corp 0.00% of their portfolio | 5.9k $28.0k | Added +1.2k |
| SIMPLEX TRADING, LLC 0.00% of their portfolio | 3.2k $15.3k | Added +3.1k |
| SBI Securities Co., Ltd. 0.00% of their portfolio | 2.3k $10.9k | Added +1.2k |
| JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio | 1.0k $4.7k | Unchanged |
| NewEdge Advisors, LLC 0.00% of their portfolio | 1.0k $4.7k | New |
| Ameritas Advisory Services, LLC 0.00% of their portfolio | 946 $4.5k | New |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 688 $3.0k | Reduced -1.2k |
| TD Waterhouse Canada Inc. 0.00% of their portfolio | 500 $2.2k | New |
| SALEM INVESTMENT COUNSELORS INC 0.00% of their portfolio | 300 $1.4k | Unchanged |
| Integrated Wealth Concepts LLC 0.00% of their portfolio | 250 $1.2k | New |
| FMR LLC 0.00% of their portfolio | 37 $175 | Unchanged |