Western Digital Corporation
MX ˙ BMV ˙ US9581021055
SecurityMX:WDC / Western Digital Corporation
InstitutionMackenzie Financial Corp
Latest Disclosed Ownership362,557 shares
Latest Disclosed Value $ 98,068,043
Mackenzie Financial Corp reports 27.96% decrease in ownership of WDC / Western Digital Corporation

On May 13, 2026 - Mackenzie Financial Corp filed a 13F-HR form disclosing ownership of 362,557 shares of Western Digital Corporation (MX:WDC) valued at $98,068,043 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 18, 2026 disclosing 503,294 shares of Western Digital Corporation. This represents a change in shares of -27.96% 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)
2026-05-13 2026-03-31 13F WESTERN DIGITAL COM 958102105 362,557 -140,737 -27.96 98,068 10.89 0.1177
2026-02-18 2025-12-31 13F WESTERN DIGITAL COM 958102105 503,294 195,574 63.56 88,436 139.38 0.1047
2025-11-13 2025-09-30 13F WESTERN DIGITAL COM 958102105 307,720 -134,700 -30.45 36,945 30.50 0.0448
2025-08-13 2025-06-30 13F WESTERN DIGITAL COM 958102105 442,420 -13,278 -2.91 28,310 53.67 0.0367
2025-05-07 2025-03-31 13F WESTERN DIGITAL COM 958102105 455,698 160,687 54.47 18,424 4.73 0.0262
2025-05-02 2024-12-31 13F/A-2 WESTERN DIGITAL COM 958102105 295,011 -22,365 -7.05 17,592 -18.83 0.0240
2025-02-20 2024-12-31 13F/A-1 WESTERN DIGITAL COM 958102105 295,011 -22,365 17,592 0.0229
2025-02-14 2024-12-31 13F Western Digital Common Stock 958102105 295,011 -22,365 17,450 0.0251
2024-11-13 2024-09-30 13F WESTERN DIGITAL COM 958102105 317,376 136,699 75.66 21,674 58.32 0.0302
2024-08-14 2024-06-30 13F WESTERN DIGITAL COM 958102105 180,677 152,423 539.47 13,690 610.01 0.0203
2024-05-10 2024-03-31 13F WESTERN DIGITAL COM 958102105 28,254 -1,033 -3.53 1,928 25.77 0.0028
2024-01-30 2023-12-31 13F WESTERN DIGITAL COM 958102105 29,287 -345 -1.16 1,534 15.44 0.0023
2023-10-25 2023-09-30 13F WESTERN DIGITAL COM 958102105 29,632 -8,682 -22.66 1,328 -9.97 0.0022
2023-08-03 2023-06-30 13F WESTERN DIGITAL COM 958102105 38,314 -150,199 -79.68 1,475 -79.23 0.0022
2023-04-24 2023-03-31 13F WESTERN DIGITAL COM 958102105 188,513 -91,544 -32.69 7,101 -19.63 0.0110
2023-02-14 2022-12-31 13F WESTERN DIGITAL COM 958102105 280,057 232,941 494.40 8,836 475.95 0.0148
2022-10-07 2022-09-30 13F Western Digital Common Stock 958102105 47,116 5,891 14.29 1,534 -16.99 0.0026
2022-08-10 2022-06-30 13F WESTERN DIGITAL COM 958102105 41,225 11,124 36.96 1,848 23.61 0.0030
2022-05-13 2022-03-31 13F WESTERN DIGITAL COM 958102105 30,101 3,098 11.47 1,495 -15.11 0.0020
2022-02-14 2021-12-31 13F WESTERN DIGITAL COM 958102105 27,003 -2,694 -9.07 1,761 5.07 0.0024
2021-11-08 2021-09-30 13F WESTERN DIGITAL COM 958102105 29,697 8,630 40.96 1,676 11.81 0.0024
2021-08-11 2021-06-30 13F WESTERN DIGITAL COM 958102105 21,067 -471 -2.19 1,499 4.24 0.0021
2021-05-14 2021-03-31 13F WESTERN DIGITAL COM 958102105 21,538 5,229 32.06 1,438 59.25 0.0022
2021-02-10 2020-12-31 13F WESTERN DIGITAL COM 958102105 16,309 1,077 7.07 903 62.12 0.0020
2020-11-13 2020-09-30 13F WESTERN DIGITAL COM 958102105 15,232 -217 -1.40 557 -18.33 0.0014
2020-08-13 2020-06-30 13F WESTERN DIGITAL COM 958102105 15,449 -9,444 -37.94 682 -34.17 0.0018
2020-05-14 2020-03-31 13F WESTERN DIGITAL COM 958102105 24,893 17,743 248.15 1,036 128.19 0.0033
2020-02-13 2019-12-31 13F WESTERN DIGITAL COM 958102105 7,150 7,150 454 0.0011
2019-08-23 2019-06-30 13F/A-1 WESTERN DIGITAL COM 958102105 0 -16,548 -100.00 0 -100.00
2019-05-15 2019-03-31 13F WESTERN DIGITAL COM 958102105 16,548 -43,139 -72.28 795 -63.98 0.0019
2019-02-06 2018-12-31 13F WESTERN DIGITAL COM 958102105 59,687 -10,960 -15.51 2,207 -46.64 0.0058
2018-11-15 2018-09-30 13F WESTERN DIGITAL COM 958102105 70,647 -7,642 -9.76 4,136 -31.75 0.0101
2018-08-13 2018-06-30 13F WESTERN DIGITAL COM 958102105 78,289 -88,232 -52.99 6,060 -60.56 0.0155
2018-05-14 2018-03-31 13F/A-1 WESTERN DIGITAL COM 958102105 166,521 -28,634 -14.67 15,365 -1.01 0.0392
2018-05-14 2018-03-31 13F WESTERN DIGITAL COM 958102105 166,521 15,365
2018-02-13 2017-12-31 13F WESTERN DIGITAL COM 958102105 195,155 18,961 10.76 15,521 1.96 0.0375
2017-11-13 2017-09-30 13F WESTERN DIGITAL COM 958102105 176,194 16,655 10.44 15,223 7.70 0.0821
2017-08-14 2017-06-30 13F WESTERN DIGITAL COM 958102105 159,539 -20,819 -11.54 14,135 -5.04 0.0787
2017-05-25 2017-03-31 13F/A-1 WESTERN DIGITAL COM 958102105 180,358 -7,095 -3.78 14,885 16.86 0.0871
2017-05-12 2017-03-31 13F WESTERN DIGITAL COM 958102105 180,358 14,885
2017-02-14 2016-12-31 13F WESTERN DIGITAL COM 958102105 187,453 173,846 1,277.62 12,737 1,500.13 0.0763
2016-11-15 2016-09-30 13F WESTERN DIGITAL COM 958102105 13,607 -14,965 -52.38 796 -41.04 0.0050
2016-08-12 2016-06-30 13F WESTERN DIGITAL COM 958102105 28,572 -278,602 -90.70 1,350 -90.70 0.0076
2016-05-12 2016-03-31 13F WESTERN DIGITAL COM 958102105 307,174 70,145 29.59 14,511 1.95 0.1316
2016-02-12 2015-12-31 13F WESTERN DIGITAL COM 958102105 237,029 196,878 490.34 14,234 346.21 0.0883
2015-11-13 2015-09-30 13F WESTERN DIGITAL COM 958102105 40,151 -548 -1.35 3,190 -0.06 0.0194
2015-08-13 2015-06-30 13F WESTERN DIGITAL COM 958102105 40,699 4,873 13.60 3,192 -2.12 0.0173
2015-05-13 2015-03-31 13F WESTERN DIGITAL COM 958102105 35,826 6,257 21.16 3,261 -0.37 0.0172
2015-02-11 2014-12-31 13F WESTERN DIGITAL COM 958102105 29,569 2,440 8.99 3,273 23.98 0.0167
2014-11-12 2014-09-30 13F WESTERN DIGITAL COM 958102105 27,129 2,402 9.71 2,640 15.69 0.0132
2014-08-11 2014-06-30 13F WESTERN DIGITAL COM 958102105 24,727 1,299 5.54 2,282 6.09 0.0106
2014-05-14 2014-03-31 13F WESTERN DIGITAL COM 958102105 23,428 958 4.26 2,151 14.11 0.0105
2014-02-11 2013-12-31 13F/A-1 WESTERN DIGITAL COM 958102105 22,470 -3,658 -14.00 1,885 13.76 0.0095
2014-02-03 2013-12-31 13F WESTERN DIGITAL COM 958102105 22,470 1,885
2013-11-12 2013-09-30 13F WESTERN DIGITAL COM 958102105 26,128 732 2.88 1,657 5.07 0.0084
2013-08-20 2013-06-30 13F/A-1 WESTERN DIGITAL COM 958102105 25,396 25,396 1,577 0.0075
2013-08-09 2013-06-30 13F WESTERN DIGITAL COM 958102105 25,396 1,577 0.0075
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.