Western Digital Corporation
MX ˙ BMV ˙ US9581021055
SecurityMX:WDC / Western Digital Corporation
InstitutionEthic Inc.
Latest Disclosed Ownership49,359 shares
Latest Disclosed Value $ 13,351,197
Ethic Inc. reports 43.38% increase in ownership of WDC / Western Digital Corporation

On April 27, 2026 - Ethic Inc. filed a 13F-HR form disclosing ownership of 49,359 shares of Western Digital Corporation (MX:WDC) valued at $13,351,197 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 34,426 shares of Western Digital Corporation. This represents a change in shares of 43.38% 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)
2026-04-27 2026-03-31 13F WESTERN DIGITAL COM 958102105 49,359 14,933 43.38 13,351 125.14 0.2033
2026-02-03 2025-12-31 13F WESTERN DIGITAL COM 958102105 34,426 -601 -1.72 5,931 41.02 0.0912
2025-10-17 2025-09-30 13F WESTERN DIGITAL COM 958102105 35,027 2,239 6.83 4,205 102.65 0.0692
2025-07-30 2025-06-30 13F WESTERN DIGITAL COM 958102105 32,788 -3,611 -9.92 2,075 39.45 0.0372
2025-05-13 2025-03-31 13F WESTERN DIGITAL COM 958102105 36,399 98 0.27 1,488 -31.24 0.0302
2025-02-14 2024-12-31 13F WESTERN DIGITAL COM 958102105 36,301 372 1.04 2,165 -11.71 0.0437
2024-11-13 2024-09-30 13F WESTERN DIGITAL COM 958102105 35,929 -479 -1.32 2,452 -11.13 0.0620
2024-08-13 2024-06-30 13F WESTERN DIGITAL COM 958102105 36,408 479 1.33 2,759 12.53 0.0647
2024-05-13 2024-03-31 13F WESTERN DIGITAL COM 958102105 35,929 295 0.83 2,452 31.35 0.0619
2024-02-14 2023-12-31 13F WESTERN DIGITAL COM 958102105 35,634 2,938 8.99 1,866 25.15 0.0552
2023-11-14 2023-09-30 13F WESTERN DIGITAL COM 958102105 32,696 2,378 7.84 1,492 29.77 0.0523
2023-08-14 2023-06-30 13F WESTERN DIGITAL COM 958102105 30,318 -5,401 -15.12 1,150 -14.57 0.0426
2023-05-12 2023-03-31 13F WESTERN DIGITAL COM 958102105 35,719 6,261 21.25 1,346 44.78 0.0546
2023-02-14 2022-12-31 13F WESTERN DIGITAL COM 958102105 29,458 18,208 161.85 929 153.83 0.0502
2022-11-14 2022-09-30 13F WESTERN DIGITAL COM 958102105 11,250 3,070 37.53 366 -0.27 0.0248
2022-08-10 2022-06-30 13F WESTERN DIGITAL COM 958102105 8,180 -1,730 -17.46 367 -25.41 0.0256
2022-05-16 2022-03-31 13F WESTERN DIGITAL COM 958102105 9,910 -450 -4.34 492 -27.22 0.0340
2022-02-14 2021-12-31 13F WESTERN DIGITAL COM 958102105 10,360 1,148 12.46 676 30.00 0.0521
2021-11-15 2021-09-30 13F WESTERN DIGITAL COM 958102105 9,212 1,263 15.89 520 -8.13 0.0532
2021-08-10 2021-06-30 13F WESTERN DIGITAL COM 958102105 7,949 3,370 73.60 566 84.97 0.0686
2021-05-13 2021-03-31 13F WESTERN DIGITAL COM 958102105 4,579 4,579 306 0.0545
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.