Western Digital Corporation
MX ˙ BMV ˙ US9581021055
SecurityMX:WDC / Western Digital Corporation
InstitutionPacer Advisors, Inc.
Latest Disclosed Ownership80,861 shares
Latest Disclosed Value $ 21,872,092
Pacer Advisors, Inc. reports 13.77% decrease in ownership of WDC / Western Digital Corporation

On May 6, 2026 - Pacer Advisors, Inc. filed a 13F-HR form disclosing ownership of 80,861 shares of Western Digital Corporation (MX:WDC) valued at $21,872,092 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on February 24, 2026 disclosing 93,775 shares of Western Digital Corporation. This represents a change in shares of -13.77% 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)
2026-05-06 2026-03-31 13F Western Digital Common Stock - Domestic 958102105 80,861 -12,914 -13.77 21,872 35.40 0.0346
2026-02-24 2025-12-31 13F/A-1 Western Digital Common Stock - Domestic 958102105 93,775 28,443 43.54 16,155 105.97 0.0413
2026-02-04 2025-12-31 13F Western Digital Common Stock - Domestic 958102105 93,775 28,443 16,155 0.0221
2025-10-15 2025-09-30 13F Western Digital Common Stock - Domestic 958102105 65,332 -1,315,168 -95.27 7,844 -91.12 0.0198
2025-08-12 2025-06-30 13F Western Digital Common Stock - Domestic 958102105 1,380,500 1,342,974 3,578.78 88,338 5,723.20 0.2196
2025-05-06 2025-03-31 13F Western Digital Common Stock - Domestic 958102105 37,526 -140 -0.37 1,517 -32.46 0.0036
2025-01-22 2024-12-31 13F Western Digital Common Stock - Domestic 958102105 37,666 7,727 25.81 2,246 9.88 0.0048
2024-11-12 2024-09-30 13F Western Digital Common Stock - Domestic 958102105 29,939 2,896 10.71 2,045 -0.24 0.0043
2024-08-13 2024-06-30 13F Western Digital Common Stock - Domestic 958102105 27,043 -2,937 -9.80 2,049 0.20 0.0046
2024-05-10 2024-03-31 13F Western Digital Common Stock - Domestic 958102105 29,980 3,757 14.33 2,046 48.94 0.0047
2024-01-16 2023-12-31 13F WESTERN DIGITAL Common Stock - Domestic 958102105 26,223 -141,829 -84.40 1,373 -82.09 0.0039
2023-11-13 2023-09-30 13F WESTERN DIGITAL Common Stock - Domestic 958102105 168,052 -37,023 -18.05 7,668 -1.41 0.0294
2023-07-12 2023-06-30 13F WESTERN DIGITAL Common Stock - Domestic 958102105 205,075 -34,339 -14.34 7,778 -13.75 0.0313
2023-05-02 2023-03-31 13F WESTERN DIGITAL Common Stock - Domestic 958102105 239,414 221,044 1,203.29 9,019 1,457.51 0.0385
2023-02-06 2022-12-31 13F WESTERN DIGITAL Common Stock - Domestic 958102105 18,370 -169,915 -90.24 580 -90.55 0.0030
2022-10-18 2022-09-30 13F WESTERN DIGITAL Common Stock - Domestic 958102105 188,285 177,374 1,625.64 6,129 1,153.37 0.0427
2022-08-12 2022-06-30 13F WESTERN DIGITAL Common Stock - Domestic 958102105 10,911 -159,019 -93.58 489 -94.20 0.0036
2022-04-05 2022-03-31 13F WESTERN DIGITAL Common Stock - Domestic 958102105 169,930 75,634 80.21 8,437 37.21 0.0692
2022-02-03 2021-12-31 13F WESTERN DIGITAL Common Stock - Domestic 958102105 94,296 78,501 497.00 6,149 590.12 0.0631
2021-10-15 2021-09-30 13F WESTERN DIGITAL Common Stock - Domestic 958102105 15,795 -1,602 -9.21 891 -28.03 0.0113
2021-07-21 2021-06-30 13F WESTERN DIGITAL Common Stock - Domestic 958102105 17,397 -2,690 -13.39 1,238 -7.68 0.0177
2021-04-05 2021-03-31 13F WESTERN DIGITAL Common Stock 958102105 20,087 -2,737 -11.99 1,341 6.09 0.0233
2021-01-20 2020-12-31 13F WESTERN DIGITAL Common Stock 958102105 22,824 -18,782 -45.14 1,264 -16.90 0.0237
2020-10-19 2020-09-30 13F WESTERN DIGITAL Common Stock 958102105 41,606 -6,965 -14.34 1,521 -29.06 0.0324
2020-07-29 2020-06-30 13F WESTERN DIGITAL Common Stock 958102105 48,571 19,373 66.35 2,144 73.46 0.0434
2020-04-23 2020-03-31 13F WESTERN DIGITAL Common Stock 958102105 29,198 24,340 501.03 1,236 301.30 0.0249
2020-02-10 2019-12-31 13F WESTERN DIGITAL Common Stock 958102105 4,858 -44,733 -90.20 308 -89.59 0.0139
2019-10-10 2019-09-30 13F WESTERN DIGITAL Common Stock 958102105 49,591 -64,358 -56.48 2,958 -45.40 0.0665
2019-08-12 2019-06-30 13F WESTERN DIGITAL Common Stock 958102105 113,949 -8,917 -7.26 5,418 -8.25 0.1325
2019-04-10 2019-03-31 13F WESTERN DIGITAL Common Stock 958102105 122,866 23,890 24.14 5,905 61.38 0.1639
2019-02-13 2018-12-31 13F WESTERN DIGITAL Common Stock 958102105 98,976 17,597 21.62 3,659 -23.19 0.1289
2018-11-14 2018-09-30 13F WESTERN DIGITAL Common Stock 958102105 81,379 48,052 144.18 4,764 84.65 0.1793
2018-08-14 2018-06-30 13F WESTERN DIGITAL Common Stock 958102105 33,327 7,436 28.72 2,580 7.99 0.1168
2018-05-14 2018-03-31 13F Western Digital COM 958102105 25,891 6,058 30.55 2,389 51.49 0.1321
2018-02-14 2017-12-31 13F Western Digital Com 958102105 19,833 5,508 38.45 1,577 27.38 0.1106
2017-11-08 2017-09-30 13F Western Digital Com 958102105 14,325 1,578 12.38 1,238 9.65 0.1097
2017-08-08 2017-06-30 13F WESTERN DIGITAL Com 958102105 12,747 3,727 41.32 1,129 51.75 0.1117
2017-05-09 2017-03-31 13F WESTERN DIGITAL Com 958102105 9,020 423 4.92 744 27.18 0.0912
2017-02-08 2016-12-31 13F WESTERN DIGITAL Com 958102105 8,597 297 3.58 585 20.62 0.0834
2016-11-10 2016-09-30 13F WESTERN DIGITAL Com 958102105 8,300 -277 -3.23 485 19.46 0.0737
2016-08-12 2016-06-30 13F WESTERN DIGITAL Com 958102105 8,577 1,259 17.20 406 17.34 0.0641
2016-05-13 2016-03-31 13F WESTERN DIGITAL Com 958102105 7,318 132 1.84 346 -19.91 0.0785
2016-02-17 2015-12-31 13F WESTERN DIGITAL Com 958102105 7,186 7,186 0.00 432 0.1015
2015-05-29 2015-03-31 13F Western Digital cs 958102105 0 -3,063 -100.00 0 -100.00
2015-02-18 2013-12-31 13F Western Digital cs 958102105 3,063 3,063 339 0.0815
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.