Magnachip Semiconductor Corporation
US ˙ NYSE ˙ US55933J2033

SecurityMX / Magnachip Semiconductor Corporation
InstitutionGoldman Sachs Group Inc
Latest Disclosed Ownership200,643 shares
Latest Disclosed Value $ 561,800
Goldman Sachs Group Inc ownership in MX / Magnachip Semiconductor Corporation

On May 15, 2026 - Goldman Sachs Group Inc filed a 13F-HR form disclosing ownership of 200,643 shares of Magnachip Semiconductor Corporation (US:MX) valued at $561,800 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 420,817 shares of Magnachip Semiconductor Corporation. This represents a change in shares of -52.32% during the quarter. The current value of the position is $1,791,742 USD.

Goldman Sachs Group Inc has a history of taking positions in derivatives of the underlying security (MX) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX / Magnachip Semiconductor Corporation Historical Put/Call Ratio
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)
2026-05-15 2026-03-31 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 200,643 -220,174 -52.32 562 -47.72 0.0000
2026-02-10 2025-12-31 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 420,817 -68,270 -13.96 1,073 -29.87 0.0001
2025-11-14 2025-09-30 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 489,087 83 0.02 1,531 -21.38 0.0002
2025-08-14 2025-06-30 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 489,004 85,176 21.09 1,946 40.51 0.0003
2025-06-27 2025-03-31 13F/A-2 MAGNACHIP SEMICONDUCTOR CMN 55933J203 403,828 -28,370 -6.56 1,385 -20.26 0.0002
2025-05-16 2025-03-31 13F/A-1 MAGNACHIP SEMICONDUCTOR CMN 55933J203 403,828 -28,370 1,385 0.0002
2025-05-09 2025-03-31 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 403,828 -28,370 1,385 0.0000
2025-02-11 2024-12-31 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 432,198 84,991 24.48 1,737 7.16 0.0003
2024-11-14 2024-09-30 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 347,207 -18,574 -5.08 1,621 -8.98 0.0003
2024-08-13 2024-06-30 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 365,781 -31,529 -7.94 1,781 -19.63 0.0003
2024-05-15 2024-03-31 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 397,310 18,535 4.89 2,217 -21.97 0.0004
2024-05-14 2023-12-31 13F/A-2 MAGNACHIP SEMICONDUCTOR CMN 55933J203 378,775 15,345 4.22 2,841 -5.96 0.0005
2024-03-01 2023-12-31 13F/A-1 MAGNACHIP SEMICONDUCTOR CMN 55933J203 378,775 15,345 2,841 0.0005
2024-02-13 2023-12-31 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 378,775 2,841
2024-05-15 2023-09-30 13F/A-1 MAGNACHIP SEMICONDUCTOR CMN 55933J203 363,430 -121,099 -24.99 3,020 -44.25 0.0006
2023-11-14 2023-09-30 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 363,430 -121,099 3,020 0.0006
2024-05-14 2023-06-30 13F/A-1 MAGNACHIP SEMICONDUCTOR CMN 55933J203 484,529 -15,949 -3.19 5,417 16.65 0.0012
2023-08-15 2023-06-30 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 484,529 -15,949 5,417 0.0011
2024-05-14 2023-03-31 13F/A-1 MAGNACHIP SEMICONDUCTOR CMN 55933J203 500,478 8,341 1.69 4,644 0.50 0.0011
2023-05-11 2023-03-31 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 500,478 8,341 4,644 0.0010
2024-05-14 2022-12-31 13F/A-1 MAGNACHIP SEMICONDUCTOR CMN 55933J203 492,137 413,047 522.25 4,621 0.0011
2023-02-13 2022-12-31 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 492,137 413,047 4,621 0.0010
2024-05-14 2022-09-30 13F/A-1 MAGNACHIP SEMICONDUCTOR CMN 55933J203 79,090 39,584 100.20 1 0.0002
2022-11-14 2022-09-30 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 79,090 39,584 810 0.0002
2024-05-14 2022-06-30 13F/A-2 MAGNACHIP SEMICONDUCTOR CMN 55933J203 39,506 -169,488 -81.10 1 -100.00 0.0001
2022-08-18 2022-06-30 13F/A-1 MAGNACHIP SEMICONDUCTOR CMN 55933J203 39,506 -169,488 574 0.0001
2022-08-15 2022-06-30 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 39,506 574
2022-05-16 2022-03-31 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 208,994 58,010 38.42 3,534 11.62 0.0007
2022-02-17 2021-12-31 13F/A-1 MAGNACHIP SEMICONDUCTOR CMN 55933J203 150,984 -365,600 -70.77 3,166 -65.49 0.0006
2022-02-14 2021-12-31 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 150,984 36,451 3,166 0.0006
2022-01-20 2021-09-30 13F/A-1 MAGNACHIP SEMICONDUCTOR CMN 55933J203 516,584 -8,422 -1.60 9,175 -26.76 0.0019
2021-11-10 2021-09-30 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 516,584 -8,422 9,175 0.0019
2021-08-13 2021-06-30 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 525,006 22,619 4.50 12,527 0.14 0.0028
2021-05-17 2021-03-31 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 502,387 55,328 12.38 12,510 106.98 0.0032
2021-02-12 2020-12-31 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 447,059 293,787 191.68 6,044 187.81 0.0016
2020-11-13 2020-09-30 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 153,272 17,511 12.90 2,100 50.11 0.0006
2020-08-12 2020-06-30 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 135,761 84,425 164.46 1,399 146.74 0.0004
2020-05-15 2020-03-31 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 51,336 -4,086 -7.37 567 -11.82 0.0002
2020-02-14 2019-12-31 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 55,422 -4,314 -7.22 643 6.11 0.0002
2019-11-14 2019-09-30 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 59,736 15,921 36.34 606 33.77 0.0002
2019-08-14 2019-06-30 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 43,815 32,942 302.97 453 466.25 0.0001
2019-05-15 2019-03-31 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 10,873 -13,528 -55.44 80 -68.00 0.0000
2018-08-14 2018-06-30 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 24,401 11,032 82.52 250 95.31 0.0001
2018-05-15 2018-03-31 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 13,369 -7,205 -35.02 128 -37.56 0.0000
2018-02-14 2017-12-31 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 20,574 8,034 64.07 205 44.37 0.0000
2017-11-14 2017-09-30 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 12,540 -2,576 -17.04 142 -4.05 0.0000
2017-08-14 2017-06-30 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 15,116 -65,757 -81.31 148 -70.46 0.0000
2017-02-14 2016-12-31 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 80,873 58,059 254.49 501 163.68 0.0001
2016-11-14 2016-09-30 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 22,814 8,800 62.79 190 156.76 0.0001
2016-02-16 2015-12-31 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 14,014 3,762 36.70 74 32.14 0.0000
2015-05-15 2015-03-31 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 10,252 -23,237 -69.39 56 -85.71 0.0000
2014-11-14 2014-09-30 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 33,489 -6,415 -16.08 392 -30.37 0.0001
2014-08-14 2014-06-30 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 39,904 3,931 10.93 563 12.38 0.0002
2014-05-15 2014-03-31 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 35,973 -12,504 -25.79 501 -46.98 0.0002
2014-02-14 2013-12-31 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 48,477 -11,965 -19.80 945 -27.36 0.0003
2013-11-14 2013-09-30 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 60,442 38,953 181.27 1,301 231.04 0.0005
2013-08-14 2013-06-30 13F MAGNACHIP SEMICONDUCTOR CMN 55933J203 21,489 21,489 393 0.0002
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2024-05-14 2022-09-30 13F/A MAGNACHIP SEMICONDUCTOR CMN Call 0 -100.00 0 n/a n/a n/a
2022-11-10 2022-09-30 13F MAGNACHIP SEMICONDUCTOR CMN Call 0 0 n/a n/a n/a
2022-08-18 2022-06-30 13F/A MAGNACHIP SEMICONDUCTOR CMN Call 60,900 885 n/a n/a n/a
2024-05-14 2022-06-30 13F/A MAGNACHIP SEMICONDUCTOR CMN Call 60,900 1 n/a n/a n/a
2022-08-15 2022-06-30 13F MAGNACHIP SEMICONDUCTOR CMN Call 60,900 885 n/a n/a n/a
2020-08-12 2020-06-30 13F MAGNACHIP SEMICONDUCTOR CMN Call 0 -100.00 0 -100.00 n/a n/a n/a
2020-05-15 2020-03-31 13F MAGNACHIP SEMICONDUCTOR CMN Call 450,000 800.00 4,972 1,776.23 n/a n/a n/a
2016-02-16 2015-12-31 13F MAGNACHIP SEMICONDUCTOR CMN Call 50,000 265 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2020-02-14 2019-12-31 13F MAGNACHIP SEMICONDUCTOR CMN Put 0 -100.00 0 -100.00 n/a n/a n/a
2019-11-14 2019-09-30 13F MAGNACHIP SEMICONDUCTOR CMN Put 48,300 0.00 490 -2.00 n/a n/a n/a
2019-08-14 2019-06-30 13F MAGNACHIP SEMICONDUCTOR CMN Put 48,300 500 n/a n/a n/a
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.