Stocks › MX
MAGNACHIP SEMICONDUCTOR Corp
MX·NYSE·USD
$3.43
-0.11 (-3.11%)
Close · Oct 6, 2026 · Close Prices from Tiingo.com
MX
MAGNACHIP SEMICONDUCTOR Corp · NYSE
Nasdaq 100S&P 500
Filings
Default90D1Y5YALL
MXS&P 500 (rebased)
Congress BuyCongress SellInsider BuyInsider SellForm 1448-K ResultsLobbying
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Daily closes, adjusted for splits and dividends · Close Prices from Tiingo.comHover a marker, every one is a filing · move across the line for the crosshair
Congressional Trades
Recent trades of MX by members of U.S. Congress · 2 on record
| Politician | Stock | Type | Filed | Traded | |
|---|---|---|---|---|---|
 Michael T. McCaulHouse · R · TX |
MXMAGNACHIP SEMICONDUCTOR Corp · Stock |
Sale $1,001 - $15,000 |
Sep 17, 2014 | — | Filing ↗ |
| Michael T. McCaulHouse · R · TX |
MXMAGNACHIP SEMICONDUCTOR Corp · Stock |
Sale $1,001 - $15,000 |
Sep 17, 2014 | — | Filing ↗ |
Whale Activity
Position changes in MX reported for 2026-06-30 by 8 tracked institutional filers
- Increased4
- New0
- Held1
- Decreased2
- Closed1
- No prior filing0
| Filer | Shares | Value | Change |
|---|---|---|---|
| TWO SIGMA INVESTMENTS, LP | 1.5M | $7.1M | increased |
| D. E. Shaw & Co., Inc. | 1.4M | $6.6M | increased |
| RENAISSANCE TECHNOLOGIES LLC | 661.6K | $3.1M | increased |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 239.7K | $1.1M | held |
| MILLENNIUM MANAGEMENT LLC | 236.4K | $1.1M | decreased |
| CITADEL ADVISORS LLC | 111.0K | $525K | increased |
| BlackRock, Inc. | 13.4K | $63K | decreased |
| Point72 Asset Management | 0 | $0 | closed |
KeyVex tracks a curated set of large 13F filers plus the largest positions in recent filings, so this is a sample of institutional activity, not the whole market.
Insider Trading
Net shares bought (+) or sold (−) on the open market by MX insiders, by quarter · Form 4
Recent Insider Transactions
455 transactions on record · newest first
| Insider | Type | Shares | Price | Value | Date | |
|---|---|---|---|---|---|---|
| LEE CHAEChief Executive Officer · Director | Purchase | +20.0K | $3.22 | $64K | Sep 24, 2026 | Form 4 ↗ |
| LEE CHAEChief Executive Officer · Director | Purchase | +50.0K | $3.17 | $159K | Sep 23, 2026 | Form 4 ↗ |
| LEE CHAEChief Executive Officer · Director | Purchase | +30.0K | $3.19 | $96K | Sep 23, 2026 | Form 4 ↗ |
| Park ShinyoungChief Financial Officer | Grant / award | +112.5K | $0.00 | $0 | Jun 1, 2026 | Form 4 ↗ |
| Lee SeunghoonChief of Manufacturing | Grant / award | +30.0K | $0.00 | $0 | Jun 1, 2026 | Form 4 ↗ |
| NATHAN GILBERT EDirector | Purchase | +22.0K | $2.87 | $63K | Mar 16, 2026 | Form 4 ↗ |
| NATHAN GILBERT EDirector | Purchase | +13.0K | $2.79 | $36K | Mar 13, 2026 | Form 4 ↗ |
| NATHAN GILBERT EDirector | Purchase | +25.0K | $2.75 | $69K | Mar 12, 2026 | Form 4 ↗ |
| NATHAN GILBERT EDirector | Grant / award | +1,478 | $0.00 | $0 | Feb 15, 2026 | Form 4 ↗ |
| Chung Kyo-Hwa LizDirector | Grant / award | +2,946 | $0.00 | $0 | Feb 15, 2026 | Form 4 ↗ |
| Amoruso CristianoDirector | Grant / award | +28.6K | $0.00 | $0 | Feb 15, 2026 | Form 4 ↗ |
| Lee SeunghoonSee Remarks | Tax withholding | −4,880 | $2.55 | $12K | Dec 31, 2025 | Form 4 ↗ |
| Lee SeunghoonSee Remarks | Tax withholding | −4,761 | $2.55 | $12K | Dec 31, 2025 | Form 4 ↗ |
| Lee SeunghoonSee Remarks | Tax withholding | −2,778 | $2.55 | $7K | Dec 31, 2025 | Form 4 ↗ |
| Lee SeunghoonSee Remarks | Tax withholding | −3,333 | $2.55 | $8K | Dec 31, 2025 | Form 4 ↗ |
| Lee SeunghoonSee Remarks | Grant / award | +7,000 | $2.55 | $18K | Dec 31, 2025 | Form 4 ↗ |
| Park Shin YoungSee Remarks | Tax withholding | −18.0K | $2.55 | $46K | Dec 31, 2025 | Form 4 ↗ |
| Park Shin YoungSee Remarks | Tax withholding | −12.2K | $2.55 | $31K | Dec 31, 2025 | Form 4 ↗ |
| Park Shin YoungSee Remarks | Tax withholding | −6,121 | $2.55 | $16K | Dec 31, 2025 | Form 4 ↗ |
| Chung Kyo-Hwa LizDirector | Grant / award | +3,160 | $0.00 | $0 | Nov 15, 2025 | Form 4 ↗ |
Fund Holders
Mutual funds and ETFs holding MX · SEC Form N-PORT
| Fund | Shares | Value | % of fund | As of |
|---|---|---|---|---|
| Columbia Small Cap Value Discovery Fund COLUMBIA FUNDS SERIES TRUST I | 1.2M | $4.0M | 0.18% | Apr 30, 2026 |
| VANGUARD STRATEGIC SMALL-CAP EQUITY FUND VANGUARD HORIZON FUNDS | 239.7K | $1.1M | 0.04% | Jun 30, 2026 |
| Columbia Variable Portfolio - Small Cap Value Fund COLUMBIA FUNDS VARIABLE INSURANCE TRUST | 235.3K | $659K | 0.16% | Mar 31, 2026 |
| Ultra-Small Company Fund BRIDGEWAY FUNDS INC | 187.8K | $526K | 0.62% | Mar 31, 2026 |
| Avantis U.S. Small Cap Equity ETF American Century ETF Trust | 58.4K | $514K | 0.02% | May 31, 2026 |
| U.S. SMALL CAP PORTFOLIO DFA INVESTMENT DIMENSIONS GROUP INC | 156.7K | $511K | 0.00% | Jul 31, 2026 |
| U.S. MICRO CAP PORTFOLIO DFA INVESTMENT DIMENSIONS GROUP INC | 93.0K | $303K | 0.00% | Jul 31, 2026 |
| Ultra-Small Company Market Fund Bridgeway Funds, Inc. | 40.0K | $189K | 0.13% | Jun 30, 2026 |
| Dimensional U.S. Small Cap ETF Dimensional ETF Trust | 51.6K | $168K | 0.00% | Jul 31, 2026 |
| State Street(R) SPDR(R) S&P(R) International Small Cap ETF SPDR INDEX SHARES FUNDS | 28.7K | $136K | 0.02% | Jun 30, 2026 |
Mutual funds and ETFs whose N-PORT filings list MX's shares (CUSIP 55933J203), each fund at its latest report since Mar 7, 2026, largest positions first. Bonds, options and short positions are left out.
Activist & Passive Stakes
Schedule 13D / 13G beneficial-ownership filings
No 13D/13G beneficial-ownership filings on record.
Corporate Lobbying
Estimated quarterly lobbying spending reported under the LDA, filings naming MAGNACHIP SEMICONDUCTOR Corp as client
No lobbying filings found naming MAGNACHIP SEMICONDUCTOR Corp as the client.
Government Contracts
Federal awards to MAGNACHIP SEMICONDUCTOR Corp · USAspending
No federal contract awards found for MAGNACHIP SEMICONDUCTOR Corp.
U.S. Patents
Recent USPTO applications naming MAGNACHIP SEMICONDUCTOR Corp
No USPTO patent applications found for MAGNACHIP SEMICONDUCTOR Corp.
Annual Financials
From MX's 10-K filings · XBRL
No annual XBRL figures on record for MX. KeyVex's fundamentals cover about 130 large companies so far.
Stock Splits
Every split and reverse split in the price history
No stock splits in MX's price history.
Material Events (8-K)
Corporate events filed with the SEC
- 8-K · Items 1.01, 3.02, 7.01, 9.01Material agreement · Unregistered sale of equity · Reg FD disclosureSep 21, 2026
EDGAR ↗ - 8-K · Items 2.02, 9.01Results of operationsJul 29, 2026
EDGAR ↗ - 8-K · Items 5.02, 7.01, 9.01Officer / director change · Reg FD disclosureJun 30, 2026
EDGAR ↗ - 8-K · Items 1.01, 9.01Material agreementJun 17, 2026
EDGAR ↗ - 8-K · Items 5.02, 5.07, 9.01Officer / director change · Shareholder voteJun 17, 2026
EDGAR ↗
About MAGNACHIP SEMICONDUCTOR Corp
From SEC EDGAR company records
Industry (SIC 3674)Semiconductors & Related Devices
SectorTechnology
HeadquartersCHEONGJU-SI
IncorporatedDE
SEC CIK0001325702 ↗
Former namesMAGNACHIP SEMICONDUCTOR Corp, MAGNACHIP SEMICONDUCTOR LLC