Western Digital Corporation
MX ˙ BMV ˙ US9581021055
SecurityMX:WDC / Western Digital Corporation
InstitutionCWM Advisors, LLC
Latest Disclosed Ownership12,273 shares
Latest Disclosed Value $ 3,319,724
CWM Advisors, LLC reports 555.26% increase in ownership of WDC / Western Digital Corporation

On May 13, 2026 - CWM Advisors, LLC filed a 13F-HR/A form disclosing ownership of 12,273 shares of Western Digital Corporation (MX:WDC) valued at $3,319,724 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,873 shares of Western Digital Corporation. This represents a change in shares of 555.26% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-13 2026-03-31 13F/A-1 WESTERN DIGITAL COM 958102105 12,273 10,400 555.26 3,320 930.75 0.6660
2026-04-23 2026-03-31 13F WESTERN DIGITAL COM 958102105 1,307 -566 354 0.0291
2026-02-17 2025-12-31 13F WESTERN DIGITAL COM 958102105 1,873 -10,912 -85.35 323 -79.02 0.0290
2025-10-15 2025-09-30 13F WESTERN DIGITAL COM 958102105 12,785 8,314 185.95 1,535 436.71 0.1494
2025-07-24 2025-06-30 13F WESTERN DIGITAL COM 958102105 4,471 -3,191 -41.65 286 -7.44 0.0312
2025-06-03 2025-03-31 13F WESTERN DIGITAL COM 958102105 7,662 3,338 77.20 310 20.23 0.0368
2025-01-17 2024-12-31 13F WESTERN DIGITAL COM 958102105 4,324 177 4.27 258 -9.19 0.0289
2024-10-10 2024-09-30 13F WESTERN DIGITAL COM 958102105 4,147 704 20.45 283 8.85 0.0290
2024-08-12 2024-06-30 13F WESTERN DIGITAL COM 958102105 3,443 -3,020 -46.73 261 -41.04 0.0301
2024-05-07 2024-03-31 13F WESTERN DIGITAL COM 958102105 6,463 6,463 441 0.0451
2020-08-12 2020-06-30 13F WESTERN DIGITAL COM 958102105 0 -14,706 -100.00 0 -100.00
2020-05-08 2020-03-31 13F WESTERN DIGITAL COM 958102105 14,706 -1,702 -10.37 612 -41.21 0.2445
2020-01-24 2019-12-31 13F WESTERN DIGITAL COM 958102105 16,408 -1,311 -7.40 1,041 -1.51 0.3733
2019-11-13 2019-09-30 13F WESTERN DIGITAL COM 958102105 17,719 1,295 7.88 1,057 35.34 0.4030
2019-07-16 2019-06-30 13F WESTERN DIGITAL COM 958102105 16,424 3,073 23.02 781 21.65 0.3285
2019-05-16 2019-03-31 13F WESTERN DIGITAL COM 958102105 13,351 1,907 16.66 642 51.77 0.2981
2019-02-21 2018-12-31 13F/A-1 WESTERN DIGITAL COM 958102105 11,444 2,844 33.07 423 -15.90 0.2844
2019-02-21 2018-09-30 13F/A-1 WESTERN DIGITAL COM 958102105 8,600 2,303 36.57 503 3.29 0.3100
2018-11-07 2018-09-30 13F WESTERN DIGITAL COM 958102105 8,579 5,785 502
2019-02-21 2018-06-30 13F/A-1 WESTERN DIGITAL COM 958102105 6,297 3,740 146.27 487 106.36 0.3461
2018-07-19 2018-06-30 13F WESTERN DIGITAL COM 958102105 2,794 2,794 216
2019-02-22 2018-03-31 13F/A-1 WESTERN DIGITAL COM 958102105 2,557 341 15.39 236 34.09 0.2404
2019-02-21 2017-12-31 13F/A-1 WESTERN DIGITAL COM 958102105 2,216 2,216 176 0.1496
2018-02-15 2017-12-31 13F Western Digital COM 958102105 43 3
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.