Western Digital Corporation
CH ˙ BRSE ˙ US9581021055
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT
SecurityCH:12355 / Western Digital Corporation
InstitutionGendell Jeffrey L
Latest Disclosed Ownership200,009 shares
Latest Disclosed Value $ 54,100,434
Gendell Jeffrey L reports 4.84% decrease in ownership of 12355 / Western Digital Corporation

On May 15, 2026 - Gendell Jeffrey L filed a 13F-HR form disclosing ownership of 200,009 shares of Western Digital Corporation (CH:12355) valued at $54,100,434 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 210,189 shares of Western Digital Corporation. This represents a change in shares of -4.84% 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.

Upgrade to unlock premium data and export to Excel .

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 COM 958102105 200,009 -10,180 -4.84 54,100 49.41 0.4080
2026-02-13 2025-12-31 13F WESTERN DIGITAL COM 958102105 210,189 -29,811 -12.42 36,209 25.66 0.6291
2025-11-14 2025-09-30 13F WESTERN DIGITAL COM 958102105 240,000 145,000 152.63 28,814 373.99 0.5300
2025-08-14 2025-06-30 13F WESTERN DIGITAL COM 958102105 95,000 50,000 111.11 6,079 234.19 0.1614
2025-05-15 2025-03-31 13F WESTERN DIGITAL COM 958102105 45,000 -247,605 -84.62 1,819 -89.57 0.0785
2025-02-14 2024-12-31 13F WESTERN DIGITAL COM 958102105 292,605 30,000 11.42 17,448 -2.70 0.5462
2024-11-14 2024-09-30 13F WESTERN DIGITAL COM 958102105 262,605 2,605 1.00 17,933 -8.97 0.5623
2024-08-14 2024-06-30 13F WESTERN DIGITAL COM 958102105 260,000 260,000 19,700 0.6895
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.