Western Digital Corporation
CH ˙ BRSE ˙ US9581021055
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT
SecurityCH:12355 / Western Digital Corporation
InstitutionLPL Financial LLC
Latest Disclosed Ownership396,886 shares
Latest Disclosed Value $ 107,353,700
LPL Financial LLC reports 19.11% increase in ownership of 12355 / Western Digital Corporation

On May 6, 2026 - LPL Financial LLC filed a 13F-HR form disclosing ownership of 396,886 shares of Western Digital Corporation (CH:12355) valued at $107,353,700 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 333,217 shares of Western Digital Corporation. This represents a change in shares of 19.11% 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 COM 958102105 396,886 63,669 19.11 107,354 87.02 0.0285
2026-02-11 2025-12-31 13F WESTERN DIGITAL COM 958102105 333,217 68,938 26.09 57,403 80.92 0.0157
2025-11-12 2025-09-30 13F WESTERN DIGITAL COM 958102105 264,279 112,620 74.26 31,729 226.97 0.0092
2025-08-12 2025-06-30 13F WESTERN DIGITAL COM 958102105 151,659 29,446 24.09 9,705 96.40 0.0032
2025-05-07 2025-03-31 13F WESTERN DIGITAL COM 958102105 122,213 -8,109 -6.22 4,941 -36.42 0.0019
2025-02-11 2024-12-31 13F WESTERN DIGITAL COM 958102105 130,322 -17,226 -11.67 7,771 -22.88 0.0032
2024-11-08 2024-09-30 13F WESTERN DIGITAL COM 958102105 147,548 14,414 10.83 10,076 -0.11 0.0045
2024-08-07 2024-06-30 13F WESTERN DIGITAL COM 958102105 133,134 29,751 28.78 10,088 43.00 0.0050
2024-05-10 2024-03-31 13F WESTERN DIGITAL COM 958102105 103,383 19,775 23.65 7,055 61.12 0.0038
2024-02-14 2023-12-31 13F WESTERN DIGITAL COM 958102105 83,608 11,199 15.47 4,379 32.55 0.0027
2023-11-13 2023-09-30 13F WESTERN DIGITAL COM 958102105 72,409 -12,560 -14.78 3,304 2.51 0.0023
2023-07-31 2023-06-30 13F WESTERN DIGITAL COM 958102105 84,969 -7,279 -7.89 3,223 -7.25 0.0023
2023-05-10 2023-03-31 13F WESTERN DIGITAL COM 958102105 92,248 -13,636 -12.88 3,475 4.01 0.0027
2023-02-07 2022-12-31 13F WESTERN DIGITAL COM 958102105 105,884 -23,153 -17.94 3,341 -20.48 0.0029
2022-11-14 2022-09-30 13F WESTERN DIGITAL COM 958102105 129,037 -23,651 -15.49 4,200 -38.64 0.0041
2022-08-12 2022-06-30 13F WESTERN DIGITAL COM 958102105 152,688 14,254 10.30 6,845 -0.41 0.0065
2022-05-16 2022-03-31 13F WESTERN DIGITAL COM 958102105 138,434 -14,677 -9.59 6,873 -31.16 0.0059
2022-02-14 2021-12-31 13F WESTERN DIGITAL COM 958102105 153,111 -796 -0.52 9,984 14.94 0.0084
2021-11-15 2021-09-30 13F WESTERN DIGITAL COM 958102105 153,907 -52,805 -25.55 8,686 -40.96 0.0082
2021-08-13 2021-06-30 13F WESTERN DIGITAL COM 958102105 206,712 12,779 6.59 14,712 13.65 0.0149
2021-05-14 2021-03-31 13F WESTERN DIGITAL COM 958102105 193,933 33,346 20.77 12,945 45.53 0.0149
2021-02-12 2020-12-31 13F WESTERN DIGITAL COM 958102105 160,587 -10,922 -6.37 8,895 41.89 0.0115
2020-11-09 2020-09-30 13F WESTERN DIGITAL COM 958102105 171,509 47,427 38.22 6,269 14.44 0.0098
2020-08-13 2020-06-30 13F WESTERN DIGITAL COM 958102105 124,082 31,476 33.99 5,478 42.14 0.0095
2020-05-14 2020-03-31 13F WESTERN DIGITAL COM 958102105 92,606 2,935 3.27 3,854 -32.28 0.0083
2020-02-14 2019-12-31 13F WESTERN DIGITAL COM 958102105 89,671 -23,173 -20.54 5,691 -15.44 0.0104
2019-11-13 2019-09-30 13F WESTERN DIGITAL COM 958102105 112,844 -23,114 -17.00 6,730 4.10 0.0137
2019-08-09 2019-06-30 13F WESTERN DIGITAL COM 958102105 135,958 2,582 1.94 6,465 0.86 0.0138
2019-05-08 2019-03-31 13F WESTERN DIGITAL COM 958102105 133,376 47,845 55.94 6,410 102.72 0.0146
2019-02-07 2018-12-31 13F WESTERN DIGITAL COM 958102105 85,531 -973 -1.12 3,162 -37.56 0.0084
2018-11-14 2018-09-30 13F WESTERN DIGITAL COM 958102105 86,504 -8,649 -9.09 5,064 -31.25 0.0121
2018-08-14 2018-06-30 13F WESTERN DIGITAL COM 958102105 95,153 -4,656 -4.66 7,366 -20.01 0.0193
2018-05-15 2018-03-31 13F WESTERN DIGITAL COM 958102105 99,809 -2,643 -2.58 9,209 13.02 0.0254
2018-02-14 2017-12-31 13F WESTERN DIGITAL COM 958102105 102,452 884 0.87 8,148 -7.15 0.0248
2017-11-14 2017-09-30 13F WESTERN DIGITAL COM 958102105 101,568 24,443 31.69 8,775 28.42 0.0310
2017-08-14 2017-06-30 13F WESTERN DIGITAL COM 958102105 77,125 60,319 358.91 6,833 395.14 0.0259
2017-05-15 2017-03-31 13F WESTERN DIGITAL COM 958102105 16,806 -1,250 -6.92 1,380 10.05 0.0094
2017-02-13 2016-12-31 13F WESTERN DIGITAL COM 958102105 18,056 -17,194 -48.78 1,254 -39.39 0.0095
2016-11-16 2016-09-30 13F WESTERN DIGITAL COM 958102105 35,250 5,842 19.87 2,069 54.75 0.0197
2016-08-15 2016-06-30 13F WESTERN DIGITAL COM 958102105 29,408 -20,657 -41.26 1,337 -39.47 0.0113
2016-05-16 2016-03-31 13F WESTERN DIGITAL COM 958102105 50,065 17,949 55.89 2,209 14.40 0.0061
2016-02-12 2015-12-31 13F WESTERN DIGITAL COM 958102105 32,116 11,987 59.55 1,931 16.82 0.0054
2015-11-13 2015-09-30 13F WESTERN DIGITAL COM 958102105 20,129 -3,551 -15.00 1,653 -12.49 0.0091
2015-08-14 2015-06-30 13F WESTERN DIGITAL COM 958102105 23,680 -4,252 -15.22 1,889 -26.75 0.0096
2015-05-14 2015-03-31 13F WESTERN DIGITAL COM 958102105 27,932 -2,891 -9.38 2,579 -24.41 0.0132
2015-02-13 2014-12-31 13F WESTERN DIGITAL COM 958102105 30,823 -209 -0.67 3,412 16.17 0.0187
2014-11-10 2014-09-30 13F WESTERN DIGITAL COM 958102105 31,032 -792 -2.49 2,937 0.00 0.0175
2014-08-05 2014-06-30 13F/A-1 WESTERN DIGITAL COM 958102105 31,824 1,065 3.46 2,937 4.00 0.0171
2014-08-05 2014-06-30 13F WESTERN DIGITAL COM 958102105 31,824 1,693
2014-05-12 2014-03-31 13F WESTERN DIGITAL COM 958102105 30,759 -3,024 -8.95 2,824 -0.35 0.0174
2014-02-13 2013-12-31 13F WESTERN DIGITAL COM 958102105 33,783 -3,897 -10.34 2,834 9.17 0.0177
2013-11-04 2013-09-30 13F WESTERN DIGITAL COM 958102105 37,680 8,118 27.46 2,596 41.39 0.0173
2013-08-15 2013-06-30 13F WESTERN DIGITAL COM 958102105 29,562 29,562 1,836 0.0132
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.