Western Digital Corporation
MX ˙ BMV ˙ US9581021055
SecurityMX:WDC / Western Digital Corporation
InstitutionKovack Advisors, Inc.
Latest Disclosed Ownership12,038 shares
Latest Disclosed Value $ 3,649,576
Kovack Advisors, Inc. reports 127.48% increase in ownership of WDC / Western Digital Corporation

On May 12, 2026 - Kovack Advisors, Inc. filed a 13F-HR form disclosing ownership of 12,038 shares of Western Digital Corporation (MX:WDC) valued at $3,649,576 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on February 17, 2026 disclosing 5,292 shares of Western Digital Corporation. This represents a change in shares of 127.48% 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)
2026-05-12 2026-03-31 13F WESTERN DIGITAL COM 958102105 12,038 6,746 127.48 3,650 300.55 0.1947
2026-02-17 2025-12-31 13F/A-1 WESTERN DIGITAL COM 958102105 5,292 1,908 56.38 912 124.38 0.0424
2026-02-12 2025-12-31 13F WESTERN DIGITAL COM 958102105 5,292 1,908 733 0.0561
2025-11-10 2025-09-30 13F WESTERN DIGITAL COM 958102105 3,384 -2,367 -41.16 406 10.63 0.0383
2025-08-04 2025-06-30 13F WESTERN DIGITAL COM 958102105 5,751 5,751 368 0.0361
2025-05-06 2025-03-31 13F WESTERN DIGITAL COM 958102105 0 -4,038 -100.00 0 -100.00
2025-02-05 2024-12-31 13F WESTERN DIGITAL COM 958102105 4,038 200 5.21 241 -8.40 0.0236
2024-11-05 2024-09-30 13F WESTERN DIGITAL COM 958102105 3,838 3,838 262 0.0278
2023-04-21 2023-03-31 13F WESTERN DIGITAL ORD ORD 958102105 0 -14,675 -100.00 0 -100.00
2023-02-22 2022-12-31 13F WESTERN DIGITAL ORD ORD 958102105 14,675 -6,105 -29.38 463 -31.66 0.0677
2022-11-14 2022-09-30 13F WESTERN DIGITAL ORD ORD 958102105 20,780 -1,125 -5.14 676 -31.16 0.0993
2022-08-10 2022-06-30 13F WESTERN DIGITAL ORD ORD 958102105 21,905 4,925 29.00 982 16.49 0.1296
2022-05-16 2022-03-31 13F WESTERN DIGITAL ORD ORD 958102105 16,980 1,950 12.97 843 -13.98 0.0866
2022-01-18 2021-12-31 13F WESTERN DIGITAL ORD ORD 958102105 15,030 6,396 74.08 980 101.23 0.0947
2021-11-03 2021-09-30 13F WESTERN DIGITAL ORD ORD 958102105 8,634 4,071 89.22 487 49.85 0.0529
2021-07-29 2021-06-30 13F WESTERN DIGITAL ORD ORD 958102105 4,563 558 13.93 325 21.72 0.0370
2021-05-04 2021-03-31 13F WESTERN DIGITAL ORD ORD 958102105 4,005 1,472 58.11 267 19.20 0.0347
2018-08-30 2017-06-30 13F WESTERN DIGITAL CORP COM COM 958102105 2,533 -921 -26.66 224 8.21 0.0707
2018-10-18 2015-12-31 13F WESTERN DIGITAL CORP COM COM 958102105 3,454 3,454 207 0.1365
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.