Western Digital Corporation
CH ˙ BRSE ˙ US9581021055
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT
SecurityCH:12355 / Western Digital Corporation
InstitutionAncora Advisors, LLC
Latest Disclosed Ownership2,782 shares
Latest Disclosed Value $ 752,503
Ancora Advisors, LLC reports 61.64% decrease in ownership of 12355 / Western Digital Corporation

On May 15, 2026 - Ancora Advisors, LLC filed a 13F-HR form disclosing ownership of 2,782 shares of Western Digital Corporation (CH:12355) valued at $752,503 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 7,252 shares of Western Digital Corporation. This represents a change in shares of -61.64% 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)
2026-05-15 2026-03-31 13F WESTERN DIGITAL CORP COM COM 958102105 2,782 -4,470 -61.64 753 -39.79 0.0160
2026-02-17 2025-12-31 13F WESTERN DIGITAL CORP COM COM 958102105 7,252 -10,944 -60.15 1,249 -42.81 0.0257
2025-11-14 2025-09-30 13F WESTERN DIGITAL COM 958102105 18,196 -440 -2.36 2,185 83.22 0.0436
2025-08-14 2025-06-30 13F WESTERN DIGITAL COM 958102105 18,636 4,826 34.95 1,193 113.62 0.0247
2025-05-15 2025-03-31 13F WESTERN DIGITAL COM 958102105 13,810 13,780 45,933.33 558 55,700.00 0.0125
2025-02-14 2024-12-31 13F WESTERN DIGITAL COM 958102105 30 30 2 0.0000
2022-11-14 2022-09-30 13F WESTERN DIGITAL COM 958102105 0 -30 -100.00 0 -100.00
2022-08-15 2022-06-30 13F WESTERN DIGITAL COM 958102105 30 0 0.00 1 0.00 0.0000
2022-05-16 2022-03-31 13F/A-1 WESTERN DIGITAL COM 958102105 30 0 0.00 1 -50.00 0.0000
2022-02-14 2021-12-31 13F WESTERN DIGITAL COM 958102105 30 0 0.00 2 0.00 0.0000
2021-11-15 2021-09-30 13F WESTERN DIGITAL COM 958102105 30 30 2 0.0001
2021-11-12 2020-09-30 13F/A-1 WESTERN DIGITAL COM 958102105 0 -250 -100.00 0 -100.00
2020-11-13 2020-09-30 13F WESTERN DIGITAL COM 958102105 0 -250 0
2021-11-12 2020-06-30 13F/A-1 WESTERN DIGITAL COM 958102105 250 0 0.00 11 10.00 0.0005
2020-08-14 2020-06-30 13F WESTERN DIGITAL COM 958102105 250 0 11 0.0005
2021-11-12 2020-03-31 13F/A-1 WESTERN DIGITAL COM 958102105 250 0 0.00 10 -37.50 0.0005
2020-05-14 2020-03-31 13F WESTERN DIGITAL COM 958102105 250 0 10 462.5024
2020-02-14 2019-12-31 13F WESTERN DIGITAL COM 958102105 250 250 16 0.0006
2019-11-14 2018-12-31 13F/A-1 WESTERN DIGITAL COM 958102105 0 -750 -100.00 0 -100.00
2018-11-13 2018-09-30 13F WESTERN DIGITAL COM 958102105 750 500 200.00 44 158.82 0.0017
2017-02-14 2016-12-31 13F WESTERN DIGITAL COM 958102105 250 250 17 0.0012
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.