西部數據公司
DE ˙ XTRA ˙ US9581021055
€506.20 ↓ -6.10 (-1.19%)
2026-06-04
分享價格
SecurityDE:WDC / Western Digital Corporation
InstitutionAssetmark, Inc
Latest Disclosed Ownership239,012 shares
Latest Disclosed Value $ 64,650,296
Assetmark, Inc reports 11.45% decrease in ownership of WDC / Western Digital Corporation

On May 6, 2026 - Assetmark, Inc filed a 13F-HR form disclosing ownership of 239,012 shares of Western Digital Corporation (DE:WDC) valued at $54,877,155 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 269,910 shares of Western Digital Corporation. This represents a change in shares of -11.45% during the quarter. The current value of the position is $120,987,874 USD.

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 239,012 -30,898 -11.45 64,650 39.04 0.1318
2026-01-23 2025-12-31 13F WESTERN DIGITAL COM 958102105 269,910 164,537 156.15 46,497 267.54 0.0948
2025-11-06 2025-09-30 13F WESTERN DIGITAL COM 958102105 105,373 2,943 2.87 12,651 93.03 0.0271
2025-08-04 2025-06-30 13F WESTERN DIGITAL COM 958102105 102,430 30,809 43.02 6,555 126.39 0.0155
2025-05-06 2025-03-31 13F WESTERN DIGITAL COM 958102105 71,621 853 1.21 2,896 -31.38 0.0080
2025-02-06 2024-12-31 13F WESTERN DIGITAL COM 958102105 70,768 3,985 5.97 4,220 -7.48 0.0115
2024-11-01 2024-09-30 13F WESTERN DIGITAL COM 958102105 66,783 66,717 101,086.36 4,561 113,900.00 0.0131
2024-08-13 2024-06-30 13F WESTERN DIGITAL COM 958102105 66 45 214.29 5 300.00 0.0000
2024-05-07 2024-03-31 13F WESTERN DIGITAL COM 958102105 21 -18 -46.15 1 -50.00 0.0000
2024-02-09 2023-12-31 13F WESTERN DIGITAL COM 958102105 39 18 85.71 2 0.0000
2023-10-27 2023-09-30 13F WESTERN DIGITAL COM 958102105 21 0 0.00 1 0.0000
2023-08-11 2023-06-30 13F WESTERN DIGITAL COM COM 958102105 21 0 0.00 1 0.0000
2023-05-05 2023-03-31 13F WESTERN DIGITAL COM COM 958102105 21 0 0.00 1 0.0000
2023-02-10 2022-12-31 13F WESTERN DIGITAL COM 958102105 21 -33 -61.11 1 -100.00 0.0000
2022-11-01 2022-09-30 13F WESTERN DIGITAL COM 958102105 54 0 0.00 2 0.00 0.0000
2022-08-03 2022-06-30 13F WESTERN DIGITAL COM COM 958102105 54 0 0.00 2 -33.33 0.0000
2022-05-13 2022-03-31 13F WESTERN DIGITAL COM COM 958102105 54 0 0.00 3 -25.00 0.0000
2022-02-14 2021-12-31 13F WESTERN DIGITAL COM COM 958102105 54 0 0.00 4 33.33 0.0000
2021-11-12 2021-09-30 13F WESTERN DIGITAL COM COM 958102105 54 0 0.00 3 -25.00 0.0000
2021-08-16 2021-06-30 13F WESTERN DIGITAL COM COM 958102105 54 0 0.00 4 0.00 0.0000
2021-05-14 2021-03-31 13F WESTERN DIGITAL COM 958102105 54 0 0.00 4 33.33 0.0000
2021-02-10 2020-12-31 13F WESTERN DIGITAL COM COM 958102105 54 0 0.00 3 50.00 0.0000
2020-11-13 2020-09-30 13F WESTERN DIGITAL COM COM 958102105 54 -2,467 -97.86 2 -98.20 0.0000
2020-08-11 2020-06-30 13F WESTERN DIGITAL COM COM 958102105 2,521 324 14.75 111 21.98 0.0008
2020-05-12 2020-03-31 13F WESTERN DIGITAL COM COM 958102105 2,197 -2,042 -48.17 91 -66.17 0.0008
2020-02-11 2019-12-31 13F WESTERN DIGITAL CORP COM COM 958102105 4,239 582 15.91 269 23.39 0.0020
2019-11-13 2019-09-30 13F WESTERN DIGITAL CORP COM COM 958102105 3,657 -80 -2.14 218 22.47 0.0018
2019-08-14 2019-06-30 13F WESTERN DIGITAL CORP COM COM 958102105 3,737 122 3.37 178 2.30 0.0015
2019-05-14 2019-03-31 13F WESTERN DIGITAL CORP COM COM 958102105 3,615 -848 -19.00 174 5.45 0.0016
2019-02-13 2018-12-31 13F WESTERN DIGITAL CORP COM COM 958102105 4,463 2,617 141.77 165 52.78 0.0016
2018-11-13 2018-09-30 13F WESTERN DIGITAL CORP COM COM 958102105 1,846 195 11.81 108 -15.62 0.0010
2018-08-01 2018-06-30 13F WESTERN DIGITAL CORP COM COM 958102105 1,651 -22 -1.32 128 -16.88 0.0013
2018-05-16 2018-03-31 13F WESTERN DIGITAL CORP COM COM 958102105 1,673 1,362 437.94 154 516.00 0.0016
2018-02-13 2017-12-31 13F WESTERN DIGITAL CORP COM COM 958102105 311 24 8.36 25 0.00 0.0003
2017-11-08 2017-09-30 13F WESTERN DIGITAL CORP COM COM 958102105 287 38 15.26 25 13.64 0.0003
2017-08-14 2017-06-30 13F WESTERN DIGITAL CORP COM COM 958102105 249 178 250.70 22 266.67 0.0003
2017-09-15 2017-03-31 13F/A-1 WESTERN DIGITAL CORP COM COM 958102105 71 -408 -85.18 6 -81.82 0.0001
2017-05-08 2017-03-31 13F WESTERN DIGITAL CORP COM COM 958102105 71 -408 6
2017-09-15 2016-12-31 13F/A-1 WESTERN DIGITAL CORP COM COM 958102105 479 -75 -13.54 33 3.13 0.0005
2017-02-14 2016-12-31 13F WESTERN DIGITAL CORP COM COM 958102105 479 -75 33
2017-09-14 2016-09-30 13F/A-1 WESTERN DIGITAL CORP COM COM 958102105 554 -308 -35.73 32 -20.00 0.0005
2016-11-04 2016-09-30 13F WESTERN DIGITAL CORP COM COM 958102105 554 -308 32
2017-09-14 2016-06-30 13F/A-1 WESTERN DIGITAL CORP COM COM 958102105 862 676 363.44 40 344.44 0.0007
2016-08-08 2016-06-30 13F WESTERN DIGITAL CORP COM COM 958102105 862 676 40
2017-09-14 2016-03-31 13F/A-1 WESTERN DIGITAL CORP COM COM 958102105 186 -2,770 -93.71 9 -94.94 0.0002
2016-05-13 2016-03-31 13F WESTERN DIGITAL CORP COM COM 958102105 186 -2,770 9
2017-09-14 2015-12-31 13F/A-1 WESTERN DIGITAL CORP COM COM 958102105 2,956 -549 -15.66 178 -35.97 0.0033
2016-02-12 2015-12-31 13F WESTERN DIGITAL CORP COM COM 958102105 2,956 -549 178
2016-01-05 2015-09-30 13F/A-1 WESTERN DIGITAL CORP COM COM 958102105 3,505 -2,918 -45.43 278 -44.84 0.0058
2015-11-10 2015-09-30 13F WESTERN DIGITAL CORP COM COM 958102105 3,505 278
2015-08-13 2015-06-30 13F WESTERN DIGITAL CORP COM COM 958102105 6,423 -1,046 -14.00 504 -25.88 0.0105
2015-05-12 2015-03-31 13F WESTERN DIGITAL CORP COM COM 958102105 7,469 7,469 0.00 680 0.0145
2015-02-03 2014-12-31 13F WESTERN DIGITAL CORP COM COM 958102105 0 -8,716 -100.00 0 -100.00
2014-11-10 2014-09-30 13F WESTERN DIGITAL CORP COM COM 958102105 8,716 -3,461 -28.42 848 -24.15 0.0196
2014-05-06 2014-03-31 13F WESTERN DIGITAL CORP COM COM 958102105 12,177 -1,312 -9.73 1,118 -1.24 0.0273
2014-02-11 2013-12-31 13F WESTERN DIGITAL CORP COM COM 958102105 13,489 13,489 1,132 0.0268
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.