Western Digital Corporation
MX ˙ BMV ˙ US9581021055
SecurityMX:WDC / Western Digital Corporation
InstitutionAdvisory Services Network, LLC
Latest Disclosed Ownership34,561 shares
Latest Disclosed Value $ 9,348,452
Advisory Services Network, LLC reports 25.49% increase in ownership of WDC / Western Digital Corporation

On May 15, 2026 - Advisory Services Network, LLC filed a 13F-HR form disclosing ownership of 34,561 shares of Western Digital Corporation (MX:WDC) valued at $9,348,452 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 27,541 shares of Western Digital Corporation. This represents a change in shares of 25.49% 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)
2026-05-15 2026-03-31 13F WESTERN DIGITAL CORP COM Stock 958102105 34,561 7,020 25.49 9,348 97.05 0.0864
2026-02-17 2025-12-31 13F WESTERN DIGITAL CORP COM Stock 958102105 27,541 9,065 49.06 4,745 113.89 0.0671
2025-11-18 2025-09-30 13F WESTERN DIGITAL Stock 958102105 18,476 10,348 127.31 2,218 247.10 0.0325
2025-08-19 2025-06-30 13F WESTERN DIGITAL Stock 958102105 8,128 8,128 640 0.0103
2025-02-13 2024-12-31 13F WESTERN DIGITAL Stock 958102105 0 -12,036 -100.00 0 -100.00
2024-11-14 2024-09-30 13F WESTERN DIGITAL Stock 958102105 12,036 0 0.00 912 0.00 0.0189
2024-08-13 2024-06-30 13F WESTERN DIGITAL Stock 958102105 12,036 12,036 912 0.0189
2024-05-06 2024-03-31 13F WESTERN DIGITAL Stock 958102105 0 -1,843 -100.00 0 -100.00
2024-02-09 2023-12-31 13F WESTERN DIGITAL Stock 958102105 1,843 1,843 97 0.0024
2023-08-09 2023-06-30 13F WESTERN DIGITAL Stock 958102105 0 -3,057 -100.00 0 -100.00
2023-05-17 2023-03-31 13F WESTERN DIGITAL Stock 958102105 3,057 -299 -8.91 115 9.52 0.0032
2023-02-13 2022-12-31 13F WESTERN DIGITAL Stock 958102105 3,356 3,356 106 0.0032
2022-11-14 2022-09-30 13F WESTERN DIGITAL Stock 958102105 0 -7,400 -100.00 0 -100.00
2022-08-02 2022-06-30 13F WESTERN DIGITAL Stock 958102105 7,400 -896 -10.80 331 -19.66 0.0113
2022-05-23 2022-03-31 13F WESTERN DIGITAL Stock 958102105 8,296 8,296 412 0.0121
2021-11-05 2021-09-30 13F WESTERN DIGITAL Stock 958102105 0 -1,845 -100.00 0 -100.00
2021-08-12 2021-06-30 13F WESTERN DIGITAL Stock 958102105 1,845 -10,234 -84.73 132 -83.64 0.0042
2021-05-24 2021-03-31 13F WESTERN DIGITAL Stock 958102105 12,079 9,748 418.19 807 525.58 0.0300
2021-02-09 2020-12-31 13F WESTERN DIGITAL Stock 958102105 2,331 -68 -2.83 129 48.28 0.0052
2020-11-16 2020-09-30 13F WESTERN DIGITAL Stock 958102105 2,399 2,399 87 0.0041
2020-08-10 2020-06-30 13F WESTERN DIGITAL Stock 958102105 0 -1,336 -100.00 0 -100.00
2020-05-15 2020-03-31 13F WESTERN DIGITAL Stock 958102105 1,336 -279 -17.28 55 -46.60 0.0036
2020-02-04 2019-12-31 13F WESTERN DIGITAL Stock 958102105 1,615 -12,346 -88.43 103 -84.49 0.0054
2019-11-04 2019-09-30 13F WESTERN DIGITAL Stock 958102105 13,961 0 0.00 664 0.00 0.0407
2019-08-01 2019-06-30 13F WESTERN DIGITAL Stock 958102105 13,961 11,381 441.12 664 435.48 0.0407
2019-05-20 2019-03-31 13F WESTERN DIGITAL Stock 958102105 2,580 -285 -9.95 124 16.98 0.0087
2019-02-15 2018-12-31 13F WESTERN DIGITAL Stock 958102105 2,865 -4,723 -62.24 106 -76.18 0.0093
2018-11-02 2018-09-30 13F WESTERN DIGITAL Stock 958102105 7,588 -135 -1.75 445 -25.21 0.0325
2018-07-27 2018-06-30 13F WESTERN DIGITAL Stock 958102105 7,723 -3,723 -32.53 595 -43.66 0.0453
2018-04-23 2018-03-31 13F WESTERN DIGITAL Stock 958102105 11,446 -458 -3.85 1,056 11.51 0.0844
2018-02-08 2017-12-31 13F WESTERN DIGITAL Stock 958102105 11,904 895 8.13 947 -0.42 0.0825
2017-10-12 2017-09-30 13F WESTERN DIGITAL Stock 958102105 11,009 2,672 32.05 951 28.69 0.1089
2017-08-17 2017-06-30 13F WESTERN DIGITAL CORP COM Stock 958102105 8,337 -192 -2.25 739 4.97 0.0963
2017-04-28 2017-03-31 13F WESTERN DIGITAL CORP COM Stock 958102105 8,529 7,272 578.52 704 851.35 0.1023
2016-10-07 2016-09-30 13F WESTERN DIGITAL Stock 958102105 1,257 637 102.74 74 155.17 0.0139
2016-07-27 2016-06-30 13F WESTERN DIGITAL Stock 958102105 620 483 352.55 29 383.33 0.0066
2016-04-21 2016-03-31 13F WESTERN DIGITAL Stock 958102105 137 -1,075 -88.70 6 -91.78 0.0016
2016-01-27 2015-12-31 13F WESTERN DIGITAL CORP COM Stock 958102105 1,212 900 288.46 73 192.00 0.0235
2015-10-01 2015-09-30 13F WESTERN DIGITAL CORP COM Stock 958102105 312 -3,923 -92.63 25 -92.49 0.0075
2015-07-02 2015-06-30 13F WESTERN DIGITAL CORP COM Stock 958102105 4,235 157 3.85 333 -12.37 0.0982
2015-04-08 2015-03-31 13F WESTERN DIGITAL CORP COM Stock 958102105 4,078 307 8.14 380 -5.47 0.1049
2015-01-23 2014-12-31 13F WESTERN DIGITAL Stock 958102105 3,771 -821 -17.88 402 -9.87 0.1257
2014-10-07 2014-09-30 13F WESTERN DIGITAL Stock 958102105 4,592 4,445 3,023.81 446 3,616.67 0.1631
2014-02-13 2013-12-31 13F WESTERN DIGITAL Stock 958102105 147 147 12 0.0060
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.