Western Digital Corporation
MX ˙ BMV ˙ US9581021055
SecurityMX:WDC / Western Digital Corporation
InstitutionIng Groep Nv
Latest Disclosed Ownership173,456 shares
Latest Disclosed Value $ 46,918,113
Ing Groep Nv reports 26.10% decrease in ownership of WDC / Western Digital Corporation

On May 11, 2026 - Ing Groep Nv filed a 13F-HR form disclosing ownership of 173,456 shares of Western Digital Corporation (MX:WDC) valued at $46,918,113 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 234,710 shares of Western Digital Corporation. This represents a change in shares of -26.10% 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)
2026-05-11 2026-03-31 13F WESTERN DIGITAL COM 958102105 173,456 -61,254 -26.10 46,918 16.04 0.2869
2026-02-11 2025-12-31 13F WESTERN DIGITAL COM 958102105 234,710 162,861 226.67 40,433 368.73 0.2439
2025-11-06 2025-09-30 13F WESTERN DIGITAL COM 958102105 71,849 -34,857 -32.67 8,626 26.33 0.0467
2025-08-06 2025-06-30 13F WESTERN DIGITAL COM 958102105 106,706 40,093 60.19 6,828 153.55 0.0415
2025-05-09 2025-03-31 13F WESTERN DIGITAL COM 958102105 66,613 36,659 122.38 2,693 50.78 0.0187
2025-02-03 2024-12-31 13F WESTERN DIGITAL COM 958102105 29,954 -19,716 -39.69 1,786 -47.33 0.0120
2024-11-06 2024-09-30 13F WESTERN DIGITAL COM 958102105 49,670 44,132 796.89 3,392 709.31 0.0197
2024-08-13 2024-06-30 13F WESTERN DIGITAL COM 958102105 5,538 -44,893 -89.02 420 -87.82 0.0025
2024-05-10 2024-03-31 13F WESTERN DIGITAL COM 958102105 50,431 -74,259 -59.55 3,441 -47.30 0.0236
2024-02-08 2023-12-31 13F WESTERN DIGITAL COM 958102105 124,690 46,486 59.44 6,530 83.02 0.0525
2023-10-27 2023-09-30 13F WESTERN DIGITAL COM 958102105 78,204 -7,826 -9.10 3,568 9.35 0.0315
2023-08-07 2023-06-30 13F WESTERN DIGITAL COM 958102105 86,030 -152,560 -63.94 3,263 -63.69 0.0247
2023-05-09 2023-03-31 13F WESTERN DIGITAL COM 958102105 238,590 -441,418 -64.91 8,988 -58.11 0.0873
2023-02-13 2022-12-31 13F WESTERN DIGITAL COM 958102105 680,008 404,140 146.50 21,454 138.91 0.2153
2022-11-14 2022-09-30 13F WESTERN DIGITAL COM 958102105 275,868 209,896 318.16 8,980 203.58 0.1503
2022-08-08 2022-06-30 13F WESTERN DIGITAL COM 958102105 65,972 -14,577 -18.10 2,958 -26.03 0.0342
2022-05-13 2022-03-31 13F WESTERN DIGITAL COM 958102105 80,549 26,552 49.17 3,999 13.58 0.0403
2022-02-11 2021-12-31 13F WESTERN DIGITAL COM 958102105 53,997 15,973 42.01 3,521 64.07 0.0315
2021-11-02 2021-09-30 13F WESTERN DIGITAL COM 958102105 38,024 855 2.30 2,146 -18.87 0.0275
2021-08-13 2021-06-30 13F WESTERN DIGITAL COM 958102105 37,169 4,902 15.19 2,645 22.79 0.0422
2021-05-12 2021-03-31 13F WESTERN DIGITAL COM 958102105 32,267 87 0.27 2,154 20.88 0.0446
2021-02-11 2020-12-31 13F WESTERN DIGITAL COM 958102105 32,180 13,485 72.13 1,782 160.91 0.0398
2020-11-12 2020-09-30 13F WESTERN DIGITAL COM 958102105 18,695 4,160 28.62 683 6.39 0.0281
2020-08-13 2020-06-30 13F WESTERN DIGITAL COM 958102105 14,535 -2,904 -16.65 642 -11.57 0.0277
2020-05-06 2020-03-31 13F WESTERN DIGITAL COM 958102105 17,439 5,239 42.94 726 -6.20 0.0311
2020-02-10 2019-12-31 13F WESTERN DIGITAL COM 958102105 12,200 -1,273 -9.45 774 -3.73 0.0236
2019-11-08 2019-09-30 13F WESTERN DIGITAL COM 958102105 13,473 489 3.77 804 30.31 0.0204
2019-08-12 2019-06-30 13F WESTERN DIGITAL COM 958102105 12,984 -424 -3.16 617 -4.19 0.0108
2019-05-13 2019-03-31 13F WESTERN DIGITAL COM 958102105 13,408 -33,412 -71.36 644 -62.80 0.0139
2019-02-13 2018-12-31 13F WESTERN DIGITAL COM 958102105 46,820 -45,570 -49.32 1,731 -68.00 0.0375
2018-11-06 2018-09-30 13F WESTERN DIGITAL COM 958102105 92,390 71,556 343.46 5,409 235.34 0.0935
2018-08-10 2018-06-30 13F WESTERN DIGITAL COM 958102105 20,834 -64,681 -75.64 1,613 -79.56 0.0308
2018-05-07 2018-03-31 13F WESTERN DIGITAL COM 958102105 85,515 7,437 9.53 7,890 27.05 0.1428
2018-02-06 2017-12-31 13F WESTERN DIGITAL COM 958102105 78,078 -48,774 -38.45 6,210 -43.34 0.1036
2017-11-08 2017-09-30 13F WESTERN DIGITAL COM 958102105 126,852 -160,752 -55.89 10,960 -56.99 0.2112
2017-07-25 2017-06-30 13F WESTERN DIGITAL COM 958102105 287,604 244,800 571.91 25,482 621.26 0.4881
2017-05-01 2017-03-31 13F WESTERN DIGITAL COM 958102105 42,804 -45,861 -51.72 3,533 -41.77 0.0641
2017-02-06 2016-12-31 13F WESTERN DIGITAL COM 958102105 88,665 8,783 10.99 6,067 30.33 0.1138
2016-11-14 2016-09-30 13F WESTERN DIGITAL COM 958102105 79,882 79,882 4,655 0.0561
2016-07-27 2016-06-30 13F WESTERN DIGITAL COM 958102105 0 -17,868 -100.00 0 -100.00
2016-05-12 2016-03-31 13F WESTERN DIGITAL COM 958102105 17,868 -17,599 -49.62 844 -60.39 0.0105
2016-02-12 2015-12-31 13F WESTERN DIGITAL COM 958102105 35,467 21,902 161.46 2,131 97.86 0.0128
2015-12-09 2015-09-30 13F/A-1 WESTERN DIGITAL COM 958102105 13,565 -126,435 -90.31 1,077 -90.19 0.0075
2015-11-10 2015-09-30 13F WESTERN DIGITAL COM 958102105 13,565 1,077
2015-08-10 2015-06-30 13F WESTERN DIGITAL COM 958102105 140,000 -11,625 -7.67 10,977 -20.44 0.0595
2015-05-14 2015-03-31 13F WESTERN DIGITAL COM 958102105 151,625 100,936 199.13 13,798 145.91 0.0693
2015-02-17 2014-12-31 13F WESTERN DIGITAL COM 958102105 50,689 8,383 19.82 5,611 36.29 0.0264
2014-11-14 2014-09-30 13F WESTERN DIGITAL CORP COM COM 958102105 42,306 39,544 1,431.72 4,117 1,514.51 0.0239
2014-08-14 2014-06-30 13F WESTERN DIGITAL COM 958102105 2,762 0 0.00 255 0.79 0.0013
2014-05-14 2014-03-31 13F WESTERN DIGITAL CORP COM COM 958102105 2,762 -207,547 -98.69 253 -98.57 0.0013
2014-02-14 2013-12-31 13F WESTERN DIGITAL COM 958102105 210,309 -52,012 -19.83 17,649 6.15 0.0889
2013-11-13 2013-09-30 13F WESTERN DIGITAL COM 958102105 262,321 259,373 8,798.27 16,626 8,985.25 0.0836
2013-08-14 2013-06-30 13F WESTERN DIGITAL COM 958102105 2,948 2,948 183 0.0010
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.