Magnachip Semiconductor Corp. (MX)
NYSE: MX · Semiconductors & Related Devices · filing with the SEC since 2005
Who owns Magnachip Semiconductor Corp.
As filed with the SECHolders of 5% or more
2
Byreforge LLC holds 8.5% of Common Stock, par value $0.01 per share, as its SCHEDULE 13D/A filed Jan 20, 2026 says.
Directors and officers
7
report now, of 29 people on the record since 2011. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 2 named at left.
Holders of 5% or moreshare of the class, as filed
Byreforge LLC
SCHEDULE 13D/A · filed Jan 20, 2026 · Common Stock, par value $0.01 per share · 8.5% in Nov 20, 2025
Toro 18 Holdings LLC
SCHEDULE 13G · filed Jan 2, 2025 · Common Stock, par value $0.01 per share
Immersion Corporation
SCHEDULE 13G/A · filed Mar 20, 2026 · Common Stock, par value $0.01 per share · reported falling below 5%
Clearline Capital LP
SCHEDULE 13G/A · filed Feb 17, 2026 · Common Stock, par value $0.01 per share · reported falling below 5%, from 5.1% in Feb 12, 2025
Systematic Financial Management LP
SCHEDULE 13G · filed Feb 11, 2026 · Common Stock · reported falling below 5%, from 5.3% in Feb 13, 2025
AllianceBernstein L.P.
SCHEDULE 13G/A · filed Nov 15, 2024 · Common Stock · reported falling below 5%
What MX reports owning in othersstakes of 5% or more, and other ties
11 subsidiaries in 9 countries, from the list filed with the 10-K filed Mar 16, 2026.
Insider tradesForm 4
1sales
11purchases
0sales on a scheduled plan
1people selling
$800,000sold, in dollars
$2.0Mbought, in dollars
Open-market trades on Form 4 from Nov 10, 2025 to Nov 10, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Nov 10, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window3 of 48 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Amoruso Cristiano | director | 1 | $800,000 | 0 | 2 | $1.4M |
| Lee Chae | Chief Executive Officer | 0 | $0 | 0 | 6 | $500,000 |
| Nathan Gilbert E | director | 0 | $0 | 0 | 3 | $200,000 |