Western Digital Corporation
CH ˙ BRSE ˙ US9581021055
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT
SecurityCH:12355 / Western Digital Corporation
InstitutionFirst Trust Advisors Lp
Latest Disclosed Ownership369,889 shares
Latest Disclosed Value $ 100,051,268
First Trust Advisors Lp reports 41.02% decrease in ownership of 12355 / Western Digital Corporation

On May 13, 2026 - First Trust Advisors Lp filed a 13F-HR form disclosing ownership of 369,889 shares of Western Digital Corporation (CH:12355) valued at $100,051,268 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 627,179 shares of Western Digital Corporation. This represents a change in shares of -41.02% 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 369,889 -257,290 -41.02 100,051 -7.40 0.0715
2026-02-13 2025-12-31 13F WESTERN DIGITAL COM 958102105 627,179 135,885 27.66 108,044 83.18 0.0785
2025-11-12 2025-09-30 13F WESTERN DIGITAL COM 958102105 491,294 -445,019 -47.53 58,985 -1.55 0.0438
2025-08-13 2025-06-30 13F WESTERN DIGITAL COM 958102105 936,313 722,702 338.33 59,915 593.78 0.0482
2025-05-14 2025-03-31 13F WESTERN DIGITAL COM 958102105 213,611 202,075 1,751.69 8,636 1,157.06 0.0076
2025-02-13 2024-12-31 13F WESTERN DIGITAL COM 958102105 11,536 11,536 688 0.0006
2024-11-13 2024-09-30 13F WESTERN DIGITAL COM 958102105 0 -10,060 -100.00 0 -100.00
2024-08-13 2024-06-30 13F WESTERN DIGITAL COM 958102105 10,060 3,563 54.84 762 72.01 0.0008
2024-05-13 2024-03-31 13F WESTERN DIGITAL COM 958102105 6,497 -12,451 -65.71 443 -55.34 0.0004
2024-02-13 2023-12-31 13F WESTERN DIGITAL COM 958102105 18,948 18,948 992 0.0011
2023-11-13 2023-09-30 13F WESTERN DIGITAL COM 958102105 0 -296,273 -100.00 0 -100.00
2023-08-14 2023-06-30 13F WESTERN DIGITAL COM 958102105 296,273 -821,743 -73.50 11,238 -73.32 0.0128
2023-05-15 2023-03-31 13F WESTERN DIGITAL COM 958102105 1,118,016 109,916 10.90 42,116 32.42 0.0486
2023-02-09 2022-12-31 13F WESTERN DIGITAL COM 958102105 1,008,100 230,288 29.61 31,806 25.63 0.0378
2022-11-14 2022-09-30 13F WESTERN DIGITAL COM 958102105 777,812 -61,258 -7.30 25,317 -32.69 0.0328
2022-08-12 2022-06-30 13F WESTERN DIGITAL COM 958102105 839,070 89,374 11.92 37,615 1.06 0.0464
2022-05-13 2022-03-31 13F WESTERN DIGITAL COM 958102105 749,696 110,643 17.31 37,222 -10.68 0.0381
2022-02-08 2021-12-31 13F WESTERN DIGITAL COM 958102105 639,053 177,712 38.52 41,673 60.05 0.0405
2021-11-15 2021-09-30 13F WESTERN DIGITAL COM 958102105 461,341 -138,926 -23.14 26,038 -39.05 0.0280
2021-10-12 2021-06-30 13F/A-1 WESTERN DIGITAL COM 958102105 600,267 217,907 56.99 42,721 67.38 0.0462
2021-08-16 2021-06-30 13F WESTERN DIGITAL COM 958102105 600,267 217,907 42,721 0.0441
2021-05-14 2021-03-31 13F WESTERN DIGITAL COM 958102105 382,360 -316,435 -45.28 25,523 -34.06 0.0309
2021-02-02 2020-12-31 13F WESTERN DIGITAL COM 958102105 698,795 -1,430,785 -67.19 38,706 -50.27 0.0513
2020-11-05 2020-09-30 13F WESTERN DIGITAL COM 958102105 2,129,580 274,931 14.82 77,836 -4.94 0.1247
2020-07-22 2020-06-30 13F WESTERN DIGITAL COM 958102105 1,854,649 398,612 27.38 81,883 35.12 0.1419
2020-05-06 2020-03-31 13F WESTERN DIGITAL COM 958102105 1,456,037 -401,674 -21.62 60,600 -48.60 0.1373
2020-02-03 2019-12-31 13F WESTERN DIGITAL COM 958102105 1,857,711 -84,947 -4.37 117,909 1.77 0.2014
2019-11-04 2019-09-30 13F WESTERN DIGITAL COM 958102105 1,942,658 -1,330,212 -40.64 115,860 -25.55 0.2181
2019-07-30 2019-06-30 13F WESTERN DIGITAL COM 958102105 3,272,870 482,473 17.29 155,625 16.05 0.2934
2019-06-19 2019-03-31 13F/A-1 WESTERN DIGITAL COM 958102105 2,790,397 452,292 19.34 134,106 55.14 0.2667
2019-05-09 2019-03-31 13F WESTERN DIGITAL COM 958102105 2,790,397 452,292 134,106
2019-02-07 2018-12-31 13F WESTERN DIGITAL COM 958102105 2,338,105 706,152 43.27 86,440 -9.52 0.2049
2018-10-25 2018-09-30 13F WESTERN DIGITAL COM 958102105 1,631,953 164,966 11.25 95,535 -15.87 0.1779
2018-08-02 2018-06-30 13F WESTERN DIGITAL COM 958102105 1,466,987 43,876 3.08 113,559 -13.52 0.2355
2018-04-23 2018-03-31 13F WESTERN DIGITAL COM 958102105 1,423,111 176,917 14.20 131,310 32.49 0.3015
2018-02-08 2017-12-31 13F WESTERN DIGITAL COM 958102105 1,246,194 55,262 4.64 99,110 -3.68 0.2360
2017-10-24 2017-09-30 13F WESTERN DIGITAL COM 958102105 1,190,932 277,179 30.33 102,897 27.10 0.2647
2017-08-02 2017-06-30 13F WESTERN DIGITAL COM 958102105 913,753 -33,254 -3.51 80,959 3.59 0.2161
2017-05-02 2017-03-31 13F WESTERN DIGITAL COM 958102105 947,007 -111,319 -10.52 78,156 8.68 0.2166
2017-02-06 2016-12-31 13F WESTERN DIGITAL COM 958102105 1,058,326 188,589 21.68 71,913 41.41 0.2141
2016-11-01 2016-09-30 13F WESTERN DIGITAL COM 958102105 869,737 -34,359 -3.80 50,854 19.02 0.1518
2016-08-04 2016-06-30 13F WESTERN DIGITAL COM 958102105 904,096 92,951 11.46 42,728 11.51 0.1346
2016-05-10 2016-03-31 13F WESTERN DIGITAL COM 958102105 811,145 306,857 60.85 38,318 26.54 0.1231
2016-05-04 2015-12-31 13F/A-1 WESTERN DIGITAL COM 958102105 504,288 82,495 19.56 30,282 -9.62 0.0786
2016-02-03 2015-12-31 13F WESTERN DIGITAL COM 958102105 504,288 30,282
2015-11-05 2015-09-30 13F WESTERN DIGITAL COM 958102105 421,793 -28,025 -6.23 33,507 -5.01 0.0971
2015-08-04 2015-06-30 13F WESTERN DIGITAL COM 958102105 449,818 33,678 8.09 35,275 -6.86 0.0916
2015-05-04 2015-03-31 13F WESTERN DIGITAL COM 958102105 416,140 -56,478 -11.95 37,873 -27.61 0.1112
2015-02-13 2014-12-31 13F WESTERN DIGITAL COM 958102105 472,618 127,485 36.94 52,319 55.77 0.1765
2014-11-12 2014-09-30 13F WESTERN DIGITAL COM 958102105 345,133 -25,736 -6.94 33,588 -1.88 0.1321
2014-08-11 2014-06-30 13F WESTERN DIGITAL COM 958102105 370,869 -4,036 -1.08 34,231 -0.56 0.1422
2014-05-12 2014-03-31 13F WESTERN DIGITAL COM 958102105 374,905 -167,472 -30.88 34,424 -24.35 0.1513
2014-08-08 2013-12-31 13F/A-1 WESTERN DIGITAL COM 958102105 542,377 28,921 5.63 45,505 39.79 0.2206
2014-02-13 2013-12-31 13F WESTERN DIGITAL COM 958102105 542,377 45,505
2013-11-12 2013-09-30 13F WESTERN DIGITAL COM 958102105 513,456 65,393 14.59 32,553 17.01 0.1765
2013-08-12 2013-06-30 13F WESTERN DIGITAL COM 958102105 448,063 448,063 27,820 0.1810
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.