Western Digital Corporation
MX ˙ BMV ˙ US9581021055
SecurityMX:WDC / Western Digital Corporation
InstitutionMacquarie Group Ltd
Latest Disclosed Ownership44,830 shares
Latest Disclosed Value $ 12,126,067
Macquarie Group Ltd reports 32.58% decrease in ownership of WDC / Western Digital Corporation

On May 15, 2026 - Macquarie Group Ltd filed a 13F-HR form disclosing ownership of 44,830 shares of Western Digital Corporation (MX:WDC) valued at $12,126,067 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 66,491 shares of Western Digital Corporation. This represents a change in shares of -32.58% 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 COM 958102105 44,830 -21,661 -32.58 12,126 5.87 0.0565
2026-02-13 2025-12-31 13F WESTERN DIGITAL COM 958102105 66,491 -496,900 -88.20 11,454 -82.16 0.0501
2025-11-13 2025-09-30 13F WESTERN DIGITAL COM 958102105 563,391 502,047 818.41 64,201 1,535.69 0.0749
2025-08-14 2025-06-30 13F WESTERN DIGITAL COM 958102105 61,344 -8,750 -12.48 3,925 38.55 0.0048
2025-08-14 2025-03-31 13F/A-1 WESTERN DIGITAL COM 958102105 70,094 -2,074,702 -96.73 2,834 -97.77 0.0035
2025-05-15 2025-03-31 13F WESTERN DIGITAL COM 958102105 89,852 -2,054,944 2,037 0.0017
2025-02-14 2024-12-31 13F WESTERN DIGITAL COM 958102105 2,144,796 124,076 6.14 127,313 -7.74 0.1545
2024-11-14 2024-09-30 13F WESTERN DIGITAL COM 958102105 2,020,720 1,926,087 2,035.32 137,995 1,824.60 0.1490
2024-08-09 2024-06-30 13F WESTERN DIGITAL COM 958102105 94,633 -52,599 -35.73 7,170 -20.13 0.0082
2024-05-14 2024-03-31 13F WESTERN DIGITAL COM 958102105 147,232 1,942 1.34 8,977 17.99 0.0102
2024-02-14 2023-12-31 13F WESTERN DIGITAL COM 958102105 145,290 40,998 39.31 7,609 59.90 0.0088
2023-11-14 2023-09-30 13F WESTERN DIGITAL COM 958102105 104,292 91,839 737.48 4,759 908.05 0.0060
2023-10-27 2023-06-30 13F/A-2 WESTERN DIGITAL COM 958102105 12,453 -2,059 -14.19 472 -13.55 0.0005
2023-10-12 2023-06-30 13F/A-1 WESTERN DIGITAL COM 958102105 12,453 -2,059 472 0.0005
2023-08-14 2023-06-30 13F WESTERN DIGITAL COM 958102105 12,453 -2,059 472 0.0005
2023-06-01 2023-03-31 13F/A-1 WESTERN DIGITAL COM 958102105 14,512 0 0.00 547 19.21 0.0006
2023-05-15 2023-03-31 13F WESTERN DIGITAL COM 958102105 14,512 0 547 0.0005
2023-02-21 2022-12-31 13F WESTERN DIGITAL COM 958102105 14,512 4,200 40.73 458 36.31 0.0005
2022-11-14 2022-09-30 13F WESTERN DIGITAL COM 958102105 10,312 -109,128 -91.37 336 -93.88 0.0004
2022-08-17 2022-06-30 13F/A-1 WESTERN DIGITAL COM 958102105 119,440 -2,159 -1.78 5,487 -9.11 0.0062
2022-08-15 2022-06-30 13F WESTERN DIGITAL COM 958102105 119,440 -2,159 5,487 0.0020
2022-05-16 2022-03-31 13F WESTERN DIGITAL COM 958102105 121,599 -1,398 -1.14 6,037 -24.74 0.0046
2022-02-11 2021-12-31 13F Western Digital COM 958102105 122,997 -21,816 -15.06 8,021 -1.86 0.0067
2021-11-12 2021-09-30 13F WESTERN DIGITAL COM 958102105 144,813 -2,847 -1.93 8,173 -22.23 0.0070
2021-08-13 2021-06-30 13F WESTERN DIGITAL COM 958102105 147,660 3,792 2.64 10,509 9.43 0.0086
2021-05-14 2021-03-31 13F WESTERN DIGITAL COM 958102105 143,868 -1,800 -1.24 9,603 19.03 0.0136
2021-02-16 2020-12-31 13F WESTERN DIGITAL COM 958102105 145,668 -12,494 -7.90 8,068 39.56 0.0118
2020-11-13 2020-09-30 13F WESTERN DIGITAL COM 958102105 158,162 1,032 0.66 5,781 -16.66 0.0098
2020-08-11 2020-06-30 13F WESTERN DIGITAL COM 958102105 157,130 -2,872 -1.79 6,937 4.19 0.0119
2020-05-15 2020-03-31 13F WESTERN DIGITAL COM 958102105 160,002 35,845 28.87 6,658 -15.51 0.0137
2020-03-18 2019-12-31 13F/A-2 WESTERN DIGITAL COM 958102105 124,157 68,657 123.71 7,880 138.07 0.0113
2020-02-28 2019-12-31 13F/A-1 WESTERN DIGITAL COM 958102105 124,157 0 7,880 0.0114
2020-02-14 2019-12-31 13F WESTERN DIGITAL COM 958102105 124,157 68,657 7,880 9,888.7322
2019-11-14 2019-09-30 13F WESTERN DIGITAL COM 958102105 55,500 50 0.09 3,310 25.57 0.0055
2019-11-06 2019-06-30 13F/A-2 WESTERN DIGITAL COM 958102105 55,450 50 0.09 2,636 -0.98 0.0044
2019-09-24 2019-06-30 13F/A-1 WESTERN DIGITAL COM 958102105 55,450 0 2,636 0.0045
2019-08-14 2019-06-30 13F WESTERN DIGITAL COM 958102105 55,450 50 2,636
2019-05-15 2019-03-31 13F WESTERN DIGITAL COM 958102105 55,400 -900 -1.60 2,662 27.92 0.0045
2019-02-15 2018-12-31 13F WESTERN DIGITAL COM 958102105 56,300 3,600 6.83 2,081 -32.54 0.0040
2018-11-15 2018-09-30 13F WESTERN DIGITAL COM 958102105 52,700 -4,900 -8.51 3,085 -30.80 0.0050
2019-03-21 2018-06-30 13F/A-1 WESTERN DIGITAL COM 958102105 57,600 3,200 5.88 4,458 -11.20 0.0077
2018-08-14 2018-06-30 13F WHIRLPOOL COM 958102105 57,600 3,200 4,458
2018-05-11 2018-03-31 13F WESTERN DIGITAL COM 958102105 54,400 -5,900 -9.78 5,020 5.15 0.0091
2018-02-14 2017-12-31 13F WESTERN DIGITAL COM 958102105 60,300 -119,587 -66.48 4,774 -69.28 0.0084
2017-11-08 2017-09-30 13F WESTERN DIGITAL COM 958102105 179,887 1,132 0.63 15,542 -1.86 0.0279
2017-08-14 2017-06-30 13F WESTERN DIGITAL COM 958102105 178,755 20,621 13.04 15,837 21.36 0.0290
2017-05-15 2017-03-31 13F Western Digital COM 958102105 158,134 31,021 24.40 13,050 51.09 0.0237
2017-03-30 2016-12-31 13F/A-1 Western Digital Common Stock 958102105 127,113 -223,800 -63.78 8,637 -57.90 0.0165
2017-02-15 2016-12-31 13F Western Digital Common Stock 958102105 127,113 8,637
2016-11-15 2016-09-30 13F Western Digital Common Stock 958102105 350,913 -43,692 -11.07 20,517 10.02 0.0395
2016-09-14 2016-06-30 13F/A-1 Western Digital Common Stock 958102105 394,605 11,650 3.04 18,649 3.08 0.0366
2016-08-15 2016-06-30 13F Western Digital Common Stock 958102105 394,605 18,649
2016-05-16 2016-03-31 13F Western Digital Common Stock 958102105 382,955 123,169 47.41 18,091 15.97 0.0365
2016-02-16 2015-12-31 13F Western Digital Common Stock 958102105 259,786 -750 -0.29 15,600 -24.63 0.0320
2015-11-16 2015-09-30 13F Western Digital Common Stock 958102105 260,536 -450 -0.17 20,697 1.13 0.0444
2015-08-21 2015-06-30 13F/A-1 Western Digital Common Stock 958102105 260,986 48,983 23.10 20,466 6.07 0.0405
2015-08-14 2015-06-30 13F Western Digital Common Stock 958102105 260,986 20,466
2015-05-18 2015-03-31 13F Western Digital Common Stock 958102105 212,003 -4,142 -1.92 19,295 -19.36 0.0379
2015-02-17 2014-12-31 13F Western Digital Common Stock 958102105 216,145 10,859 5.29 23,928 19.77 0.0494
2014-11-14 2014-09-30 13F WESTERN DIGITAL COMMON 958102105 205,286 -12,589 -5.78 19,978 -0.66 0.0429
2014-08-14 2014-06-30 13F WESTERN DIGITAL COMMON 958102105 217,875 4,746 2.23 20,110 2.76 0.0449
2014-05-15 2014-03-31 13F Western Digital Common Stock 958102105 213,129 -70,405 -24.83 19,569 -17.74 0.0338
2014-02-14 2013-12-31 13F Western Digital Common Stock 958102105 283,534 33,331 13.32 23,788 49.96 0.0427
2013-11-14 2013-09-30 13F WESTERN DIGITAL Common Stock 958102105 250,203 14,800 6.29 15,863 8.53 0.0310
2013-08-16 2013-06-30 13F/A-1 WESTERN DIGITAL COMMON 958102105 235,403 235,403 14,616 0.0319
2013-08-14 2013-06-30 13F WESTERN DIGITAL COMMON 958102105 235,403 14,616 0.0319
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.