매그나칩반도체(주)
US ˙ NYSE ˙ US55933J2033

SecurityMX / Magnachip Semiconductor Corporation
InstitutionSilverback Asset Management Llc
Latest Disclosed Ownership220,000 shares
Latest Disclosed Value $ 616,000
Silverback Asset Management Llc ownership in MX / Magnachip Semiconductor Corporation

On May 21, 2026 - Silverback Asset Management Llc filed a 13F-HR/A form disclosing ownership of 220,000 shares of Magnachip Semiconductor Corporation (US:MX) valued at $616,000 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 220,000 shares of Magnachip Semiconductor Corporation. This represents a change in shares of 0.00% during the quarter. The current value of the position is $1,881,000 USD.

Silverback Asset Management Llc 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 .

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)
2026-05-21 2026-03-31 13F/A-1 MAGNACHIP SEMICONDUCTOR COM 55933J203 220,000 0 0.00 616 9.80 0.0840
2026-05-14 2026-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 220,000 0 616 0.0857
2026-02-17 2025-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 220,000 0 0.00 561 -18.46 0.0820
2025-11-13 2025-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 220,000 0 0.00 689 -21.37 0.0659
2025-08-13 2025-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 220,000 876 16.05 0.1239
2025-05-15 2025-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 755 -14.71 0.1042
2025-02-27 2024-12-31 13F/A-1 MAGNACHIP SEMICONDUCTOR COM 55933J203 220,000 0 0.00 884 -13.92 0.1325
2025-02-13 2024-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 220,000 0 884 0.1292
2024-11-14 2024-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 220,000 0 0.00 1,027 -4.11 0.1382
2024-08-14 2024-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 220,000 0 0.00 1,071 -12.71 0.1318
2024-05-14 2024-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 220,000 0 0.00 1,228 -25.64 0.1636
2024-02-13 2023-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 220,000 0 0.00 1,650 -9.74 0.2297
2023-11-14 2023-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 220,000 0 0.00 1,828 -25.66 0.2506
2023-10-06 2023-06-30 13F/A-2 MAGNACHIP SEMICONDUCTOR COM 55933J203 220,000 0 0.00 2,460 20.48 0.3354
2023-08-17 2023-06-30 13F/A-1 MAGNACHIP SEMICONDUCTOR COM 55933J203 220,000 0 2,460 0.3397
2023-08-14 2023-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 220,000 2,460
2023-05-15 2023-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 220,000 0 0.00 2,042 -1.16 0.2769
2023-02-14 2022-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 220,000 10,000 4.76 2,066 -3.95 0.2851
2023-03-02 2022-09-30 13F/A-1 MAGNACHIP SEMICONDUCTOR COM 55933J203 210,000 5,000 2.44 2,150 -27.83 0.3046
2022-11-14 2022-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 210,000 5,000 2,150 0.3261
2022-08-15 2022-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 205,000 20,000 10.81 2,979 -4.76 0.4589
2022-05-13 2022-03-31 13F Magnachip Semiconductor EQUITY 55933J203 185,000 43,987 31.19 3,128 5.78 0.4241
2022-02-14 2021-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 141,013 -110,000 -43.82 2,957 -33.67 0.3534
2021-11-15 2021-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 251,013 24,048 10.60 4,458 -17.67 0.6543
2021-08-16 2021-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 226,965 951 0.42 5,415 -3.78 0.6534
2021-05-17 2021-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 226,014 226,014 5,628 1.2214
2020-08-14 2020-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 0 -583,180 -100.00 0 -100.00
2020-05-13 2020-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 583,180 33,721 6.14 6,444 1.02 1.3714
2020-02-13 2019-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 549,459 112,112 25.63 6,379 43.83 0.9472
2019-12-05 2019-09-30 13F/A-1 MAGNACHIP SEMICONDUCTOR COM 55933J203 437,347 40,060 10.08 4,435 7.86 0.6787
2019-11-14 2019-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 437,347 40,060 4,435 678,710.5265
2019-08-14 2019-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 397,287 -102,713 -20.54 4,112 11.14 0.6517
2019-05-15 2019-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 500,000 -229,159 -31.43 3,700 -18.29 0.6332
2019-02-14 2018-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 729,159 -50,768 -6.51 4,528 -41.35 0.8376
2018-11-14 2018-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 779,927 205,006 35.66 7,721 31.02 1.2002
2018-08-14 2018-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 574,921 25,000 4.55 5,893 11.63 0.7473
2018-05-14 2018-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 549,921 90,208 19.62 5,279 15.41 1.0351
2018-02-13 2017-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 459,713 -102,287 -18.20 4,574 -28.30 0.8678
2017-11-14 2017-09-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 562,000 248,539 79.29 6,379 107.65 1.0207
2017-09-18 2017-06-30 13F/A-1 MAGNACHIP SEMICONDUCTOR COM 55933J203 313,461 5,000 1.62 3,072 4.28 1.1618
2017-08-14 2017-06-30 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 313,461 5,000 3,072
2017-05-12 2017-03-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 308,461 278,461 928.20 2,946 1,483.87 0.7237
2017-02-14 2016-12-31 13F MAGNACHIP SEMICONDUCTOR COM 55933J203 30,000 30,000 186 0.0576
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
(%)
2021-08-16 2021-06-30 13F MAGNACHIP SEMICONDUCTOR COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-05-17 2021-03-31 13F MAGNACHIP SEMICONDUCTOR COM Call 250,000 1,250 n/a n/a n/a
2019-05-15 2019-03-31 13F MAGNACHIP SEMICONDUCTOR COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2019-02-14 2018-12-31 13F MAGNACHIP SEMICONDUCTOR COM Call 166,300 -0.60 1,033 -37.66 n/a n/a n/a
2018-11-14 2018-09-30 13F MAGNACHIP SEMICONDUCTOR COM Call 167,300 1,657 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.