MX · Insider trading · 13F holders · Congress trades
MAGNACHIP SEMICONDUCTOR Corp (MX)
Who is buying and selling MX: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 7
- Insider buys, 90 days
- $318K
- Insider sales, 90 days
- $0
- Congress trades, 12 months
- 0
MX at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 1 MX insider filed 1 open-market purchase worth $318K on SEC Form 4.
- 7 13F filers hold MX among their 50 largest positions, worth $16.4M combined, including Howard Marks and Prem Watsa. The biggest bets by portfolio weight are FourWorld Capital Management LLC (8.8%), Silverback Asset Management LLC (1.8%) and Bluefin Capital Management, LLC (0.2%). In their latest 13Fs, 1 manager opened a new position and 0 added to one.
- No member of Congress has disclosed a trade in MX.
- MX last closed at $2.63 on Oct 29, 2026.
MX insider trading
Between Aug 1, 2026 and Oct 29, 2026, 1 MX insider filed 1 open-market purchase worth $318K on SEC Form 4.
Who owns MX? Hedge funds and superinvestors
7 13F filers hold MX among their 50 largest positions, worth $16.4M combined, including Howard Marks and Prem Watsa. The biggest bets by portfolio weight are FourWorld Capital Management LLC (8.8%), Silverback Asset Management LLC (1.8%) and Bluefin Capital Management, LLC (0.2%). In their latest 13Fs, 1 manager opened a new position and 0 added to one.
Superinvestors holding MX: Howard Marks 0.2% · Prem Watsa 0.0%
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| FourWorld Capital Management LLCHedge fund | 8.8% | $7.6M | 1,600,695 | -3.4% shares | Q2 2026 |
| Howard MarksSuperinvestor · Hedge fund | 0.2% | $7.1M | 1,500,000 | -47.4% shares | Q2 2026 |
| Bluefin Capital Management, LLCHedge fund | 0.2% | $699K | 147,698 | — | Q2 2026 |
| Silverback Asset Management LLCInstitutional asset manager | 1.8% | $473K | 100,000 | -54.5% shares | Q2 2026 |
| Prem WatsaSuperinvestor · Insurance company | 0.0% | $296K | 62,500 | -50.0% shares | Q2 2026 |
| Polunin Capital Partners LtdHedge fund | 0.0% | $189K | 59,811 | +0.0% shares | Q3 2026 |
| Owlhouse Capital LPHedge fund | 0.1% | $62K | 13,140 | New | Q2 2026 |
Each manager counts with its latest 13F (Q3 2026: 1, Q2 2026: 6). Screen MX in the grand portfolio →
MX stock trades by members of Congress
No member of Congress has disclosed a trade in MX.
Analysis mentioning MX
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MX questions and answers
Are insiders buying MX stock?
Between Aug 1, 2026 and Oct 29, 2026, 1 MX insider filed 1 open-market purchase worth $318K on SEC Form 4.
Which hedge funds own MX?
7 13F filers hold MX among their 50 largest positions, worth $16.4M combined, including Howard Marks and Prem Watsa. The biggest bets by portfolio weight are FourWorld Capital Management LLC (8.8%), Silverback Asset Management LLC (1.8%) and Bluefin Capital Management, LLC (0.2%). In their latest 13Fs, 1 manager opened a new position and 0 added to one.
Has Congress traded MX?
No member of Congress has disclosed a trade in MX.
Who is the largest holder of MX?
Among 13F filers, FourWorld Capital Management LLC reports the largest MX position, $7.6M (1,600,695 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is FourWorld Capital Management LLC's: 8.8% of its portfolio.
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