Magnachip Semiconductor Corporation
Magnachip Semiconductor Corporation (MX) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · MX · as of Mar 31, 2025
Ownership Breakdown
91
Institutional Holders
▲ 5 vs Q4
$78.63M
Total Inst. Value
▼ $16.86M vs Q4
36.44M
Shares Outstanding
freeFloat 75.26%
23.01M
13F Shares Held
▼ 735,082 vs Q4
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
MX largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
IMMERSION CORP semiconductors & related devices | 2.97M | 8.05% | 8.05% | $10.19B | May 15, 2025 | — held |
OAKTREE CAPITAL MANAGEMENT LP semiconductors & related devices | 2.85M | 7.73% | 7.73% | $9.78B | May 15, 2025 | — held |
SYSTEMATIC FINANCIAL MANAGEMENT LP semiconductors & related devices | 1.91M | 5.18% | 5.18% | $6.55B | May 14, 2025 | ▼ 55.9K |
CLEARLINE CAPITAL LP semiconductors & related devices | 1.90M | 5.15% | 5.15% | $6.52B | May 16, 2025 | — held |
AMERIPRISE FINANCIAL INC semiconductors & related devices | 1.49M | 4.04% | 4.04% | $5.11B | May 14, 2025 | ▲ 30.7K |
VANGUARD GROUP INC semiconductors & related devices | 1.03M | 2.80% | 2.80% | $3.54B | May 9, 2025 | ▼ 52.6K |
DIMENSIONAL FUND ADVISORS LP semiconductors & related devices | 984.5K | 2.67% | 2.67% | $3.38B | May 13, 2025 | ▼ 25.8K |
QUINN OPPORTUNITY PARTNERS LLC semiconductors & related devices | 730.5K | 1.98% | 1.98% | $2.51B | May 14, 2025 | — held |
S SQUARED TECHNOLOGY, LLC semiconductors & related devices | 639.7K | 1.73% | 1.73% | $2.19B | May 16, 2025 | ▼ 50.0K |
MORGAN STANLEY semiconductors & related devices | 632.2K | 1.71% | 1.71% | $2.17B | May 15, 2025 | ▼ 45.4K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
14
Increased
+785.9K shares3
New Positions
first time holders23
Decreased
−1.35M shares0
Sold Out
fully exitedNet shares change (top 50)
563.1K
+785.9K / −1.35M
Net new holders
-6
3 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
MX insider trading · insider activity
Source: SEC Form 4
Insiders have been net buyers of shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
6
Buy transactions
0
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
NATHAN GILBERT E director | Mar 16, 2026 | Purchase | 21,994 | $2.87 | $63.1K | 158.2K | Form 4 ↗ |
NATHAN GILBERT E director | Mar 13, 2026 | Purchase | 13,006 | $2.79 | $36.2K | 136.2K | Form 4 ↗ |
NATHAN GILBERT E director | Mar 12, 2026 | Purchase | 25,000 | $2.75 | $68.7K | 123.2K | Form 4 ↗ |
NATHAN GILBERT E director | Feb 15, 2026 | Award | 1,478 | — | — | 214.5K | Form 4 ↗ |
Chung Kyo-Hwa Liz director | Feb 15, 2026 | Award | 2,946 | — | — | 100.8K | Form 4 ↗ |
Amoruso Cristiano director | Feb 15, 2026 | Award | 28,628 | — | — | 28.6K | Form 4 ↗ |
Lee Seunghoon See Remarks | Dec 31, 2025 | Award | 7,000 | $2.55 | $17.9K | 144.0K | Form 4 ↗ |
Lee Seunghoon See Remarks | Dec 31, 2025 | Tax Withhold | 3,333 | $2.55 | $8.5K | 140.6K | Form 4 ↗ |
Lee Seunghoon See Remarks | Dec 31, 2025 | Tax Withhold | 2,778 | $2.55 | $7.1K | 137.8K | Form 4 ↗ |
Lee Seunghoon See Remarks | Aug 15, 2025 | Award | 30,750 | — | — | 137.0K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Magnachip Semiconductor Corporation (MX) is primarily owned by institutional investors, who hold approximately 63.1% of total shares outstanding. Company insiders own approximately 24.74%, while retail and public investors account for the remaining 12.12%.
The largest institutional shareholder of Magnachip Semiconductor Corporation is IMMERSION CORP, holding approximately 2.97 million shares — equal to 8.05% of outstanding shares — as of March 31, 2025.
A total of 91 institutional investors currently hold MX stock, with a combined institutional value of approximately $78,630,506 as of the most recent 13F filing period.
Frequently asked questions
MX ownershipMagnachip Semiconductor Corporation (MX) is primarily owned by institutional investors, who hold approximately 63.1% of shares. The largest shareholder is IMMERSION CORP with a 8.05% stake. Company insiders hold 24.74%. Data sourced from SEC Form 13F as of March 31, 2025.