Western Digital Corporation
MX ˙ BMV ˙ US9581021055
SecurityMX:WDC / Western Digital Corporation
InstitutionParallel Advisors, LLC
Latest Disclosed Ownership5,788 shares
Latest Disclosed Value $ 997,153
Parallel Advisors, LLC reports 2.14% increase in ownership of WDC / Western Digital Corporation

On February 11, 2026 - Parallel Advisors, LLC filed a 13F-HR form disclosing ownership of 5,788 shares of Western Digital Corporation (MX:WDC) valued at $997,153 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 5,667 shares of Western Digital Corporation. This represents a change in shares of 2.14% during the quarter.

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)
2026-02-11 2025-12-31 13F WESTERN DIGITAL CORP COM Stock 958102105 5,788 121 2.14 997 46.62 0.0182
2025-11-13 2025-09-30 13F WESTERN DIGITAL CORP COM Stock 958102105 5,667 143 2.59 680 92.63 0.0125
2025-07-08 2025-06-30 13F WESTERN DIGITAL CORP COM Stock 958102105 5,524 2,918 111.97 353 236.19 0.0071
2025-04-08 2025-03-31 13F WESTERN DIGITAL CORP COM Stock 958102105 2,606 49 1.92 105 -30.92 0.0024
2025-02-10 2024-12-31 13F WESTERN DIGITAL CORP COM Stock 958102105 2,557 -270 -9.55 152 -21.24 0.0034
2024-11-13 2024-09-30 13F WESTERN DIGITAL CORP COM Stock 958102105 2,827 416 17.25 193 6.04 0.0045
2024-08-08 2024-06-30 13F WESTERN DIGITAL COM Stock 958102105 2,411 219 9.99 183 22.15 0.0047
2024-05-06 2024-03-31 13F WESTERN DIGITAL COM Stock 958102105 2,192 780 55.24 150 104.11 0.0041
2024-02-12 2023-12-31 13F WESTERN DIGITAL COM Stock 958102105 1,412 -157 -10.01 74 2.82 0.0022
2024-05-20 2023-09-30 13F/A-1 WESTERN DIGITAL COM Stock 958102105 1,569 232 17.35 72 42.00 0.0024
2023-11-14 2023-09-30 13F WESTERN DIGITAL COM Stock 958102105 1,569 232 72 0.0024
2024-05-20 2023-06-30 13F/A-1 WESTERN DIGITAL COM Stock 958102105 1,337 313 30.57 51 31.58 0.0016
2023-08-04 2023-06-30 13F WESTERN DIGITAL COM Stock 958102105 1,337 313 51 0.0016
2024-05-20 2023-03-31 13F/A-1 WESTERN DIGITAL COM Stock 958102105 1,024 34 3.43 39 22.58 0.0013
2023-04-25 2023-03-31 13F WESTERN DIGITAL COM Stock 958102105 1,024 34 39 0.0013
2023-02-06 2022-12-31 13F WESTERN DIGITAL COM Stock 958102105 990 -167 -14.43 31 -18.42 0.0014
2022-11-10 2022-09-30 13F WESTERN DIGITAL COM Stock 958102105 1,157 79 7.33 38 -20.83 0.0017
2022-08-01 2022-06-30 13F WESTERN DIGITAL COM Stock 958102105 1,078 334 44.89 48 26.32 0.0022
2022-04-28 2022-03-31 13F WESTERN DIGITAL COM Stock 958102105 744 -747 -50.10 38 -60.82 0.0015
2022-01-20 2021-12-31 13F WESTERN DIGITAL COM Stock 958102105 1,491 404 37.17 97 59.02 0.0036
2021-11-02 2021-09-30 13F/A-1 WESTERN DIGITAL COM Stock 958102105 1,087 94 9.47 61 -14.08 0.0025
2021-10-22 2021-09-30 13F WESTERN DIGITAL COM Stock 958102105 993 0 71 0.0030
2021-08-06 2021-06-30 13F WESTERN DIGITAL COM Stock 958102105 993 148 17.51 71 26.79 0.0030
2021-04-23 2021-03-31 13F WESTERN DIGITAL COM Stock 958102105 845 174 25.93 56 51.35 0.0026
2021-02-02 2020-12-31 13F WESTERN DIGITAL COM Stock 958102105 671 -247 -26.91 37 8.82 0.0020
2020-10-27 2020-09-30 13F WESTERN DIGITAL COM Stock 958102105 918 -803 -46.66 34 -54.67 0.0021
2020-07-16 2020-06-30 13F WESTERN DIGITAL COM Stock 958102105 1,721 -157 -8.36 75 -3.85 0.0049
2020-04-27 2020-03-31 13F WESTERN DIGITAL COM Stock 958102105 1,878 372 24.70 78 -18.75 0.0063
2020-01-30 2019-12-31 13F WESTERN DIGITAL CORP COM Stock 958102105 1,506 -159 -9.55 96 -3.03 0.0072
2019-11-01 2019-09-30 13F WESTERN DIGITAL CORP COM Stock 958102105 1,665 564 51.23 99 90.38 0.0085
2019-08-05 2019-06-30 13F WESTERN DIGITAL CORP COM Stock 958102105 1,101 87 8.58 52 6.12 0.0051
2019-05-01 2019-03-31 13F WESTERN DIGITAL CORP COM Stock 958102105 1,014 -27 -2.59 49 28.95 0.0055
2019-02-05 2018-12-31 13F WESTERN DIGITAL CORP COM Stock 958102105 1,041 104 11.10 38 -30.91 0.0053
2018-11-01 2018-09-30 13F WESTERN DIGITAL CORP COM Stock 958102105 937 -104 -9.99 55 -31.25 0.0068
2018-07-30 2018-06-30 13F WESTERN DIGITAL CORP COM Stock 958102105 1,041 144 16.05 80 -3.61 0.0114
2018-05-08 2018-03-31 13F WESTERN DIGITAL CORP COM Stock 958102105 897 -5 -0.55 83 15.28 0.0130
2018-02-13 2017-12-31 13F WESTERN DIGITAL CORP COM Stock 958102105 902 37 4.28 72 -6.49 0.0118
2017-11-15 2017-09-30 13F/A-1 WESTERN DIGITAL CORP COM Stock 958102105 865 9 1.05 77 5.48 0.0132
2017-08-07 2017-06-30 13F WESTERN DIGITAL CORP COM Stock 958102105 856 42 5.16 73 0.00 0.0138
2017-05-12 2017-03-31 13F/A-1 WESTERN DIGITAL CORP COM Stock 958102105 814 -84 -9.35 73 19.67 0.0145
2017-05-12 2017-03-31 13F WESTERN DIGITAL CORP COM Stock 958102105 814 73
2017-02-14 2016-12-31 13F WESTERN DIGITAL CORP COM Stock 958102105 898 898 61 0.0143
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.