Magnachip Semiconductor Corporation
US ˙ NYSE ˙ US55933J2033

SecurityMX / Magnachip Semiconductor Corporation
InstitutionPrelude Capital Management, Llc
Latest Disclosed Ownership403,627 shares
Latest Disclosed Value $ 1,130,156
Prelude Capital Management, Llc ownership in MX / Magnachip Semiconductor Corporation

On May 15, 2026 - Prelude Capital Management, Llc filed a 13F-HR form disclosing ownership of 403,627 shares of Magnachip Semiconductor Corporation (US:MX) valued at $1,130,156 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 251,627 shares of Magnachip Semiconductor Corporation. This represents a change in shares of 60.41% during the quarter. The current value of the position is $3,451,939 USD.

Prelude Capital Management, Llc has a history of taking positions in derivatives of the underlying security (MX) in the form of stock options.

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 COM 55933J203 403,627 152,000 60.41 1,130 76.29 0.0864
2026-02-17 2025-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 251,627 251,627 642 0.0472
2025-08-14 2025-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 0 -16,619 -100.00 0 -100.00
2025-05-15 2025-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 16,619 16,619 57 0.0043
2025-02-14 2024-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 0 -15,591 -100.00 0 -100.00
2024-11-14 2024-09-30 13F/A-1 MAGNACHIP SEMICONDUCTOR COM 55933J203 15,591 817 5.53 73 1.41 0.0044
2024-11-14 2024-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 15,591 817 73 0.0027
2024-08-14 2024-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 14,774 -2,549 -14.71 72 -26.04 0.0050
2024-05-15 2024-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 17,323 454 2.69 97 -23.81 0.0051
2024-02-14 2023-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 16,869 575 3.53 127 -6.67 0.0084
2023-11-14 2023-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 16,294 16,294 135 0.0088
2023-08-14 2023-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 0 -15,300 -100.00 0 -100.00
2023-06-01 2023-03-31 13F/A-1 MAGNACHIP SEMICONDUCTOR COM 55933J203 15,300 -18,156 -54.27 142 -55.10 0.0085
2023-05-15 2023-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 15,300 -18,156 142 0.0046
2023-02-14 2022-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 33,456 -2,031 -5.72 314 -13.50 0.0163
2022-11-14 2022-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 35,487 -32,411 -47.73 363 -63.22 0.0130
2022-08-24 2022-06-30 13F/A-1 MAGNACHIP SEMICONDUCTOR COM 55933J203 67,898 12,653 22.90 987 5.67 0.0281
2022-08-15 2022-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 67,898 12,653 987 0.0281
2022-05-16 2022-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 55,245 17,149 45.02 934 16.90 0.0268
2022-02-14 2021-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 38,096 -934 -2.39 799 15.30 0.0205
2021-11-15 2021-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 39,030 19,099 95.83 693 45.59 0.0177
2021-08-16 2021-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 19,931 19,931 476 0.0141
2021-05-17 2021-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 0 -40,892 -100.00 0 -100.00
2021-02-16 2020-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 40,892 -8,321 -16.91 553 -17.95 0.0141
2020-11-16 2020-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 49,213 10,077 25.75 674 74.16 0.0326
2018-11-14 2018-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 39,136 -27,558 -41.32 387 -43.42 0.0225
2018-08-14 2018-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 66,694 38,752 138.69 684 155.22 0.0433
2018-05-15 2018-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 27,942 27,942 268 0.0195
2018-02-14 2017-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 0 -3,509 -100.00 0 -100.00
2017-11-14 2017-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 3,509 3,509 40 0.0036
2017-08-14 2017-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 0 -6,913 -100.00 0 -100.00
2017-05-15 2017-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 6,913 4,513 188.04 66 340.00 0.0063
2017-02-14 2016-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 2,400 -16,224 -87.11 15 -90.32 0.0018
2016-11-14 2016-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 18,624 15,524 500.77 155 761.11 0.0163
2016-08-15 2016-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 3,100 -59,010 -95.01 18 -95.60 0.0025
2015-11-16 2015-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 62,110 58,510 1,625.28 409 701.96 0.0594
2014-08-14 2014-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 3,600 3,600 51 0.0067
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
(%)
2022-11-14 2022-09-30 13F MAGNACHIP SEMICONDUCTOR COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-08-24 2022-06-30 13F/A MAGNACHIP SEMICONDUCTOR COM Put 20,700 301 n/a n/a n/a
2022-08-15 2022-06-30 13F MAGNACHIP SEMICONDUCTOR COM Put 20,700 301 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.