Magnachip Semiconductor Corporation
US ˙ NYSE ˙ US55933J2033

SecurityMX / Magnachip Semiconductor Corporation
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership549,106 shares
Latest Disclosed Value $ 1,537,200
Dimensional Fund Advisors Lp reports 33.67% decrease in ownership of MX / Magnachip Semiconductor Corporation

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 549,106 shares of Magnachip Semiconductor Corporation (US:MX) valued at $1,537,497 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 827,859 shares of Magnachip Semiconductor Corporation. This represents a change in shares of -33.67% during the quarter. The current value of the position is $4,903,517 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 Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-07 2026-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 549,106 -278,753 -33.67 1,537 -27.19 0.0001
2026-02-12 2025-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 827,859 -184,731 -18.24 2,111 -33.39 0.0004
2025-11-12 2025-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 1,012,590 -11,668 -1.14 3,170 -22.25 0.0007
2025-08-12 2025-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 1,024,258 39,795 4.04 4,077 20.70 0.0009
2025-05-13 2025-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 984,463 -25,818 -2.56 3,377 -16.84 0.0008
2025-02-13 2024-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 1,010,281 -101,913 -9.16 4,061 -21.81 0.0010
2024-11-07 2024-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 1,112,194 -121,005 -9.81 5,194 -13.51 0.0013
2024-08-09 2024-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 1,233,199 -245,169 -16.58 6,006 -27.20 0.0016
2024-05-10 2024-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 1,478,368 -204,656 -12.16 8,249 -34.65 0.0022
2024-02-07 2023-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 1,683,024 -107,176 -5.99 12,623 -15.15 0.0037
2023-11-09 2023-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 1,790,200 41,226 2.36 14,876 -23.92 0.0049
2023-08-09 2023-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 1,748,974 252,858 16.90 19,554 40.84 0.0062
2023-05-12 2023-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 1,496,116 217,723 17.03 13,884 115,591.67 0.0047
2023-02-09 2022-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 1,278,393 14,083 1.11 12 -99.91 0.0035
2022-11-10 2022-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 1,264,310 450,307 55.32 12,946 9.46 0.0050
2022-08-12 2022-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 814,003 285,428 54.00 11,827 32.32 0.0042
2022-05-13 2022-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 528,575 0 0.00 8,938 -19.36 0.0028
2022-02-09 2021-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 528,575 -3,375 -0.63 11,084 17.32 0.0034
2021-11-12 2021-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 531,950 -1,106 -0.21 9,448 -25.72 0.0030
2021-08-12 2021-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 533,056 -17,507 -3.18 12,719 -7.22 0.0040
2021-05-14 2021-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 550,563 1,430 0.26 13,709 84.66 0.0045
2021-03-08 2020-12-31 13F/A-2 MAGNACHIP SEMICONDUCTOR COM 55933J203 549,133 34,895 6.79 7,424 5.38 0.0027
2021-02-11 2020-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 549,133 34,895 7,424 2,681.1542
2020-11-12 2020-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 514,238 -6,689 -1.28 7,045 31.31 0.0030
2020-08-13 2020-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 520,927 3,280 0.63 5,365 -6.21 0.0024
2020-05-14 2020-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 517,647 27,457 5.60 5,720 0.51 0.0030
2020-02-14 2019-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 490,190 -1,935 -0.39 5,691 14.05 0.0021
2019-11-12 2019-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 492,125 0 0.00 4,990 -2.02 0.0019
2019-08-13 2019-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 492,125 0 0.00 5,093 39.84 0.0020
2019-08-12 2019-03-31 13F/A-2 MAGNACHIP SEMICONDUCTOR COM 55933J203 492,125 0 0.00 3,642 19.18 0.0015
2019-05-10 2019-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 492,125 0 3,642
2019-02-26 2018-12-31 13F/A-1 MAGNACHIP SEMICONDUCTOR COM 55933J203 492,125 0 0.00 3,056 -37.27 0.0014
2019-02-13 2018-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 492,125 0 3,056
2018-11-13 2018-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 492,125 0 0.00 4,872 -3.41 0.0019
2018-08-10 2018-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 492,125 0 0.00 5,044 6.77 0.0020
2018-05-11 2018-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 492,125 -2,330 -0.47 4,724 -3.98 0.0020
2018-02-12 2017-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 494,455 0 0.00 4,920 -12.33 0.0020
2017-11-13 2017-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 494,455 0 0.00 5,612 15.81 0.0025
2017-08-11 2017-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 494,455 -113,330 -18.65 4,846 -16.51 0.0022
2017-05-12 2017-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 607,785 34,253 5.97 5,804 63.22 0.0028
2017-02-09 2016-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 573,532 185,625 47.85 3,556 9.92 0.0018
2016-11-10 2016-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 387,907 31,059 8.70 3,235 60.15 0.0017
2016-08-09 2016-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 356,848 -94,251 -20.89 2,020 -17.69 0.0012
2016-05-13 2016-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 451,099 -130,195 -22.40 2,454 -20.20 0.0015
2016-02-10 2015-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 581,294 -152,740 -20.81 3,075 -36.43 0.0019
2015-11-13 2015-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 734,034 -112,907 -13.33 4,837 -26.03 0.0032
2015-08-14 2015-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 846,941 -348,390 -29.15 6,539 0.00 0.0040
2015-05-14 2015-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 1,195,331 -92,123 -7.16 6,539 -60.90 0.0041
2015-02-06 2014-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 1,287,454 25,799 2.04 16,725 13.31 0.0110
2014-11-13 2014-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 1,261,655 56,159 4.66 14,761 -13.16 0.0105
2014-08-08 2014-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 1,205,496 31,131 2.65 16,997 3.82 0.0118
2014-05-14 2014-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 1,174,365 14,920 1.29 16,371 -27.59 0.0122
2014-02-12 2013-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 1,159,445 73,483 6.77 22,609 -3.30 0.0176
2013-11-13 2013-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 1,085,962 102,104 10.38 23,381 30.08 0.0202
2013-08-15 2013-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 983,858 983,858 17,975 0.0169
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.