Western Digital Corporation
MX ˙ BMV ˙ US9581021055
SecurityMX:WDC / Western Digital Corporation
InstitutionAlps Advisors Inc
Latest Disclosed Ownership1,822 shares
Latest Disclosed Value $ 492,833
Alps Advisors Inc reports 61.29% decrease in ownership of WDC / Western Digital Corporation

On May 8, 2026 - Alps Advisors Inc filed a 13F-HR form disclosing ownership of 1,822 shares of Western Digital Corporation (MX:WDC) valued at $492,833 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 4,707 shares of Western Digital Corporation. This represents a change in shares of -61.29% 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)
2026-05-08 2026-03-31 13F WESTERN DIGITAL COM 958102105 1,822 -2,885 -61.29 493 -39.26 0.0021
2026-02-12 2025-12-31 13F WESTERN DIGITAL COM 958102105 4,707 37 0.79 811 44.64 0.0047
2025-11-05 2025-09-30 13F WESTERN DIGITAL COM 958102105 4,670 4,670 561 0.0031
2021-02-03 2020-12-31 13F WESTERN DIGITAL COM 958102105 0 -490,052 -100.00 0 -100.00
2020-11-05 2020-09-30 13F/A-1 WESTERN DIGITAL COM 958102105 490,052 34,182 7.50 17,911 -11.01 0.2637
2020-11-04 2020-09-30 13F WESTERN DIGITAL COM 958102105 490,052 34,182 17,911 229,550.9230
2020-08-05 2020-06-30 13F WESTERN DIGITAL COM 958102105 455,870 -63,885 -12.29 20,127 -6.96 0.2698
2020-05-06 2020-03-31 13F WESTERN DIGITAL COM 958102105 519,755 -119,862 -18.74 21,632 -46.71 0.3347
2020-02-07 2019-12-31 13F WESTERN DIGITAL COM 958102105 639,617 103,299 19.26 40,596 26.92 0.3164
2019-11-04 2019-09-30 13F WESTERN DIGITAL COMMON STOCK 958102105 536,318 -439,540 -45.04 31,986 -31.07 0.2490
2019-08-07 2019-06-30 13F WESTERN DIGITAL MUTUAL FUND 958102105 975,858 185,747 23.51 46,402 22.20 0.3435
2019-05-01 2019-03-31 13F WESTERN DIGITAL COMMON STOCK 958102105 790,111 -258,011 -24.62 37,973 -2.00 0.2689
2019-02-04 2018-12-31 13F WESTERN DIGITAL COMMON STOCK 958102105 1,048,122 1,008,730 2,560.75 38,749 1,580.36 0.3007
2018-10-25 2018-09-30 13F WESTERN DIGITAL COMMON STOCK 958102105 39,392 21,796 123.87 2,306 69.31 0.0151
2018-08-02 2018-06-30 13F/A-2 Western Digital COMMON STOCK 958102105 17,596 861 5.14 1,362 -11.79 0.0089
2018-07-31 2018-06-30 13F/A-1 Western Digital COMMON STOCK 958102105 4,107 -13,489 327 0.0021
2018-07-25 2018-06-30 13F Western Digital COMMON STOCK 958102105 4,107 -12,628 327
2018-05-01 2018-03-31 13F Western Digital COMMON STOCK 958102105 16,735 12,628 307.48 1,544 372.17 0.0123
2018-02-20 2017-12-31 13F/A-1 Western Digital COMMON STOCK 958102105 4,107 -6,533 -61.40 327 -64.42 0.0023
2018-02-05 2017-12-31 13F Western Digital COMMON STOCK 958102105 4,107 -6,533 327
2017-11-03 2017-09-30 13F Western Digital COMMON STOCK 958102105 10,640 1,760 19.82 919 16.77 0.0065
2017-08-03 2017-06-30 13F Western Digital COMMON STOCK 958102105 8,880 1,827 25.90 787 35.22 0.0055
2017-05-12 2017-03-31 13F Western Digital COMMON STOCK 958102105 7,053 7,053 582 0.0040
2016-05-10 2016-03-31 13F WESTERN DIGITAL Common Stock 958102105 0 0 0 0.0000
2016-02-05 2015-12-31 13F WESTERN DIGITAL Common Stock 958102105 0 0 0 0.0000
2015-11-13 2015-09-30 13F WESTERN DIGITAL Common Stock 958102105 0 -5,465 -100.00 0 -100.00
2015-08-12 2015-06-30 13F WESTERN DIGITAL Common Stock 958102105 5,465 84 1.56 429 -12.45 0.0037
2015-05-15 2015-03-31 13F WESTERN DIGITAL Common Stock 958102105 5,381 1 0.02 490 -17.79 0.0040
2015-02-13 2014-12-31 13F WESTERN DIGITAL Common Stock 958102105 5,380 -720 -11.80 596 0.34 0.0047
2014-12-18 2014-09-30 13F/A-1 WESTERN DIGITAL Common Stock 958102105 6,100 6,100 594 0.0046
2014-11-24 2014-09-30 13F WESTERN DIGITAL Common Stock 958102105 6,100 594
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.