Marshall Wace, Llp reports 3.20% decrease in ownership of MX / Magnachip Semiconductor Corporation

Magnachip半導體公司

US ˙ NYSE ˙ US55933J2033

Security	MX / Magnachip Semiconductor Corporation
Institution	Marshall Wace, Llp
Latest Disclosed Ownership	1,244,622 shares
Latest Disclosed Value	$ 3,484,939

On May 14, 2026 - Marshall Wace, Llp filed a 13F-HR form disclosing ownership of 1,244,622 shares of Magnachip Semiconductor Corporation (US:MX) valued at $3,484,942 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,285,832 shares of Magnachip Semiconductor Corporation. This represents a change in shares of -3.20% during the quarter. The current value of the position is $10,641,518 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)

File Date	Effective Date	Form	Security	Class	ID	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-05-14	2026-03-31	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	1,244,622	-41,210	-3.20	3,485	6.28	0.0016
2026-02-13	2025-12-31	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	1,285,832	412,098	47.17	3,279	19.90	0.0030
2025-11-13	2025-09-30	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	873,734	174,209	24.90	2,735	-1.80	0.0028
2025-08-13	2025-06-30	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	699,525	288,664	70.26	2,784	97.59	0.0031
2025-05-15	2025-03-31	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	410,861	180,381	78.26	1,409	52.16	0.0018
2025-02-13	2024-12-31	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	230,480	88,223	62.02	927	39.46	0.0011
2024-11-14	2024-09-30	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	142,257	-209,650	-59.58	664	-61.24	0.0008
2024-08-14	2024-06-30	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	351,907	-452,551	-56.26	1,714	-61.83	0.0023
2024-05-15	2024-03-31	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	804,458	306,141	61.43	4,489	20.10	0.0068
2024-02-14	2023-12-31	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	498,317	164,044	49.07	3,737	34.57	0.0063
2023-11-14	2023-09-30	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	334,273	-32,098	-8.76	2,778	-32.20	0.0056
2023-08-14	2023-06-30	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	366,371	291,182	387.27	4,096	487.66	0.0080
2023-05-15	2023-03-31	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	75,189	75,189		698		0.0015
2023-02-14	2022-12-31	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	0	-99,339	-100.00	0	-100.00
2022-11-14	2022-09-30	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	99,339	2,275	2.34	1,017	-27.82	0.0022
2022-08-15	2022-06-30	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	97,064	-102,905	-51.46	1,409	-58.30	0.0029
2022-05-16	2022-03-31	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	199,969	171,636	605.78	3,379	468.86	0.0064
2022-02-14	2021-12-31	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	28,333	-23,801	-45.65	594	-35.85	0.0011
2021-11-15	2021-09-30	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	52,134	-20,644	-28.37	926	-46.66	0.0038
2021-08-13	2021-06-30	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	72,778	72,778		1,736		0.0085
2021-05-17	2021-03-31	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	0	-119,217	-100.00	0	-100.00
2021-02-16	2020-12-31	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	119,217	-214,508	-64.28	1,612	-64.74	0.0087
2020-11-16	2020-09-30	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	333,725	163,945	96.56	4,572	161.41	0.0293
2020-08-13	2020-06-30	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	169,780	-80,915	-32.28	1,749	-36.86	0.0123
2020-05-15	2020-03-31	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	250,695	158,126	170.82	2,770	157.67	0.0277
2020-02-14	2019-12-31	13F	MAGNACHIP SEMICO	COMMON STOCK	55933J203	92,569	92,569		1,075		0.0074

Legend

Shares: The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value: The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price: The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class: This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred

Allocation (%): The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation: The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%): The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis: The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss: This is the market value of the position as of the effective date minus the cost basis.