Western Digital Corporation
CH ˙ BRSE ˙ US9581021055
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT
SecurityCH:12355 / Western Digital Corporation
InstitutionPnc Financial Services Group, Inc.
Latest Disclosed Ownership68,962 shares
Latest Disclosed Value $ 18,653,540
Pnc Financial Services Group, Inc. reports 13.76% increase in ownership of 12355 / Western Digital Corporation

On May 8, 2026 - Pnc Financial Services Group, Inc. filed a 13F-HR form disclosing ownership of 68,962 shares of Western Digital Corporation (CH:12355) valued at $18,653,540 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 60,620 shares of Western Digital Corporation. This represents a change in shares of 13.76% 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)
2026-05-08 2026-03-31 13F WESTERN DIGITAL COM 958102105 68,962 8,342 13.76 18,654 78.62 0.0108
2026-02-06 2025-12-31 13F WESTERN DIGITAL COM 958102105 60,620 3,214 5.60 10,443 51.52 0.0057
2025-11-07 2025-09-30 13F WESTERN DIGITAL COM 958102105 57,406 2,709 4.95 6,892 96.91 0.0042
2025-08-08 2025-06-30 13F WESTERN DIGITAL COM 958102105 54,697 12,725 30.32 3,500 106.37 0.0023
2025-05-09 2025-03-31 13F WESTERN DIGITAL COM 958102105 41,972 10,786 34.59 1,697 -8.77 0.0009
2025-02-07 2024-12-31 13F WESTERN DIGITAL COM 958102105 31,186 635 2.08 1,860 -10.88 0.0012
2024-11-08 2024-09-30 13F WESTERN DIGITAL COM 958102105 30,551 3,179 11.61 2,086 0.63 0.0013
2024-08-09 2024-06-30 13F WESTERN DIGITAL COM 958102105 27,372 -656 -2.34 2,074 8.42 0.0014
2024-05-10 2024-03-31 13F WESTERN DIGITAL COM 958102105 28,028 3,863 15.99 1,913 51.15 0.0013
2024-03-22 2023-12-31 13F/A-1 WESTERN DIGITAL COM 958102105 24,165 841 3.61 1,266 18.89 0.0010
2024-02-09 2023-12-31 13F WESTERN DIGITAL COM 958102105 24,165 841 1,266 0.0010
2023-11-13 2023-09-30 13F WESTERN DIGITAL COM 958102105 23,324 -262 -1.11 1,064 19.02 0.0009
2023-08-11 2023-06-30 13F WESTERN DIGITAL COM 958102105 23,586 -1,467 -5.86 895 -5.20 0.0008
2023-05-15 2023-03-31 13F WESTERN DIGITAL COM 958102105 25,053 -28,601 -53.31 944 -44.27 0.0008
2023-02-10 2022-12-31 13F WESTERN DIGITAL COM 958102105 53,654 2,013 3.90 1,693 0.59 0.0016
2022-11-10 2022-09-30 13F WESTERN DIGITAL COM 958102105 51,641 -3,701 -6.69 1,682 -32.20 0.0018
2022-08-12 2022-06-30 13F WESTERN DIGITAL COM 958102105 55,342 4,167 8.14 2,481 -2.32 0.0024
2022-05-12 2022-03-31 13F WESTERN DIGITAL COM 958102105 51,175 -1,429 -2.72 2,540 -25.95 0.0022
2022-02-11 2021-12-31 13F WESTERN DI Common Stock 958102105 52,604 -641 -1.20 3,430 14.14 0.0028
2021-11-05 2021-09-30 13F WESTERN DI Common Stock 958102105 53,245 282 0.53 3,005 -20.27 0.0028
2021-08-06 2021-06-30 13F WESTERN DI Common Stock 958102105 52,963 455 0.87 3,769 7.53 0.0034
2021-05-07 2021-03-31 13F WESTERN DI Common Stock 958102105 52,508 21,977 71.98 3,505 107.27 0.0034
2021-02-12 2020-12-31 13F WESTERN DI Common Stock 958102105 30,531 1,286 4.40 1,691 58.19 0.0017
2020-11-06 2020-09-30 13F WESTERN DI Common Stock 958102105 29,245 -9,901 -25.29 1,069 -38.24 0.0013
2020-08-28 2020-06-30 13F/A-1 WESTERN DI Common Stock 958102105 39,146 259 0.67 1,731 6.98 0.0023
2020-08-07 2020-06-30 13F WESTERN DI Common Stock 958102105 39,146 259 1,731 359.4221
2020-05-08 2020-03-31 13F WESTERN DI Common Stock 958102105 38,887 647 1.69 1,618 -33.33 0.0020
2020-02-07 2019-12-31 13F WESTERN DI Common Stock 958102105 38,240 -9,466 -19.84 2,427 -14.75 0.0024
2019-11-08 2019-09-30 13F WESTERN DI Common Stock 958102105 47,706 -5,816 -10.87 2,847 11.78 0.0028
2019-08-09 2019-06-30 13F WESTERN DI Common Stock 958102105 53,522 -17,207 -24.33 2,547 -25.07 0.0025
2019-05-10 2019-03-31 13F WESTERN DI Common Stock 958102105 70,729 -5,809 -7.59 3,399 20.11 0.0034
2019-02-08 2018-12-31 13F WESTERN DI Common Stock 958102105 76,538 38,187 99.57 2,830 26.00 0.0032
2018-11-09 2018-09-30 13F WESTERN DI Common Stock 958102105 38,351 -25,808 -40.23 2,246 -54.77 0.0021
2018-08-10 2018-06-30 13F WESTERN DI Common Stock 958102105 64,159 -18,449 -22.33 4,966 -34.85 0.0049
2018-05-11 2018-03-31 13F WESTERN DI Common Stock 958102105 82,608 20,624 33.27 7,622 54.64 0.0075
2018-02-09 2017-12-31 13F WESTERN DI Common Stock 958102105 61,984 -5,185 -7.72 4,929 -15.08 0.0048
2017-11-13 2017-09-30 13F WESTERN DI Common Stock 958102105 67,169 26,343 64.53 5,804 60.55 0.0060
2017-08-11 2017-06-30 13F WESTERN DI 958102105 40,826 -5,157 -11.22 3,615 -4.77 0.0039
2017-05-12 2017-03-31 13F WESTERN DI Common Stock 958102105 45,983 11,437 33.11 3,796 61.74 0.0042
2017-02-10 2016-12-31 13F WESTERN DI Common Stock 958102105 34,546 -235 -0.68 2,347 15.45 0.0027
2016-11-04 2016-09-30 13F WESTERN DI Common Stock 958102105 34,781 -24,917 -41.74 2,033 -27.93 0.0024
2016-08-05 2016-06-30 13F WESTERN DI Common Stock 958102105 59,698 2,884 5.08 2,821 5.03 0.0033
2016-05-06 2016-03-31 13F WESTERN DI Common Stock 958102105 56,814 10,182 21.83 2,686 -4.04 0.0031
2016-02-05 2015-12-31 13F WESTERN DI Common Stock 958102105 46,632 -8,264 -15.05 2,799 -35.85 0.0033
2015-11-06 2015-09-30 13F WESTERN DI Common Stock 958102105 54,896 -54,390 -49.77 4,363 -49.08 0.0052
2015-08-05 2015-06-30 13F WESTERN DI Common Stock 958102105 109,286 -34,826 -24.17 8,569 -34.67 0.0096
2015-05-08 2015-03-31 13F WESTERN DI Common Stock 958102105 144,112 -90,479 -38.57 13,116 -49.50 0.0144
2015-02-06 2014-12-31 13F/A-1 WESTERN DIGITAL COM 958102105 234,591 24,571 11.70 25,970 27.05 0.0285
2015-02-06 2014-12-31 13F WESTERN DIGITAL COM 958102105 234,591 25,970
2014-11-07 2014-09-30 13F WESTERN DIGITAL COM 958102105 210,020 22,496 12.00 20,440 18.08 0.0241
2014-08-08 2014-06-30 13F WESTERN DIGITAL COM 958102105 187,524 4,595 2.51 17,310 3.07 0.0220
2014-05-09 2014-03-31 13F WESTERN DIGITAL COM 958102105 182,929 -45,915 -20.06 16,795 -12.53 0.0221
2014-02-07 2013-12-31 13F WESTERN DIGITAL COM 958102105 228,844 113,702 98.75 19,200 163.05 0.0255
2013-11-01 2013-09-30 13F WESTERN DIGITAL COM 958102105 115,142 21,670 23.18 7,299 25.74 0.0106
2013-08-02 2013-06-30 13F WESTERN DIGITAL COM 958102105 93,472 93,472 5,805 0.0085
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.