Western Digital Corporation
MX ˙ BMV ˙ US9581021055
SecurityMX:WDC / Western Digital Corporation
InstitutionEngineers Gate Manager LP
Latest Disclosed Ownership68,069 shares
Latest Disclosed Value $ 18,411,985
Engineers Gate Manager LP reports 26.29% decrease in ownership of WDC / Western Digital Corporation

On May 15, 2026 - Engineers Gate Manager LP filed a 13F-HR form disclosing ownership of 68,069 shares of Western Digital Corporation (MX:WDC) valued at $18,411,985 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 92,344 shares of Western Digital Corporation. This represents a change in shares of -26.29% 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 COM 958102105 68,069 -24,275 -26.29 18,412 15.73 0.2301
2026-02-17 2025-12-31 13F WESTERN DIGITAL COM 958102105 92,344 61,910 203.42 15,908 335.48 0.1887
2025-11-14 2025-09-30 13F WESTERN DIGITAL COM 958102105 30,434 -10,399 -25.47 3,654 39.85 0.0418
2025-08-14 2025-06-30 13F WESTERN DIGITAL COM 958102105 40,833 15,870 63.57 2,613 158.87 0.0325
2025-05-15 2025-03-31 13F WESTERN DIGITAL COM 958102105 24,963 -104,112 -80.66 1,009 -86.89 0.0170
2025-02-14 2024-12-31 13F WESTERN DIGITAL COM 958102105 129,075 102,588 387.31 7,697 325.66 0.1340
2024-11-14 2024-09-30 13F WESTERN DIGITAL COM 958102105 26,487 -267,701 -91.00 1,809 -91.89 0.0353
2024-08-14 2024-06-30 13F WESTERN DIGITAL COM 958102105 294,188 155,019 111.39 22,291 134.73 0.5027
2024-05-15 2024-03-31 13F WESTERN DIGITAL COM 958102105 139,169 69,190 98.87 9,497 159.17 0.2500
2024-02-14 2023-12-31 13F WESTERN DIGITAL COM 958102105 69,979 42,117 151.16 3,665 188.28 0.1046
2023-11-14 2023-09-30 13F WESTERN DIGITAL COM 958102105 27,862 -52,075 -65.15 1,271 -58.08 0.0470
2023-08-14 2023-06-30 13F WESTERN DIGITAL COM 958102105 79,937 -61,251 -43.38 3,032 -42.99 0.1146
2023-05-15 2023-03-31 13F WESTERN DIGITAL COM 958102105 141,188 34,428 32.25 5,319 57.90 0.2222
2023-02-14 2022-12-31 13F WESTERN DIGITAL COM 958102105 106,760 106,760 3,368 0.2023
2022-08-15 2022-06-30 13F WESTERN DIGITAL COM 958102105 0 -7,200 -100.00 0 -100.00
2022-05-16 2022-03-31 13F WESTERN DIGITAL COM 958102105 7,200 7,200 357 0.0140
2021-11-15 2021-09-30 13F WESTERN DIGITAL COM 958102105 0 -34,201 -100.00 0 -100.00
2021-08-16 2021-06-30 13F WESTERN DIGITAL COM 958102105 34,201 -12,839 -27.29 2,434 -22.48 0.1565
2021-05-17 2021-03-31 13F WESTERN DIGITAL COM 958102105 47,040 39,859 555.06 3,140 688.94 0.1556
2021-02-16 2020-12-31 13F WESTERN DIGITAL COM 958102105 7,181 -16,800 -70.06 398 -54.62 0.0173
2020-11-16 2020-09-30 13F WESTERN DIGITAL COM 958102105 23,981 1,028 4.48 877 -13.43 0.0412
2020-08-17 2020-06-30 13F WESTERN DIGITAL COM 958102105 22,953 12,593 121.55 1,013 135.03 0.0515
2020-05-15 2020-03-31 13F WESTERN DIGITAL COM 958102105 10,360 -60,316 -85.34 431 -90.39 0.0310
2020-02-14 2019-12-31 13F WESTERN DIGITAL COM 958102105 70,676 70,676 4,486 0.1973
2019-11-14 2019-09-30 13F WESTERN DIGITAL COM 958102105 0 -106,073 -100.00 0 -100.00
2019-08-14 2019-06-30 13F WESTERN DIGITAL COM 958102105 106,073 106,073 5,044 0.2784
2018-08-03 2018-06-30 13F WESTERN DIGITAL COM 958102105 0 -33,129 -100.00 0 -100.00
2018-05-07 2018-03-31 13F WESTERN DIGITAL COM 958102105 33,129 3,084 10.26 3,057 27.96 0.2037
2018-02-01 2017-12-31 13F WESTERN DIGITAL COM 958102105 30,045 20,499 214.74 2,389 189.58 0.1640
2017-11-13 2017-09-30 13F WESTERN DIGITAL COM 958102105 9,546 6,877 257.66 825 249.58 0.0694
2017-08-10 2017-06-30 13F WESTERN DIGITAL COM 958102105 2,669 -17,870 -87.01 236 -86.08 0.0213
2017-05-05 2017-03-31 13F WESTERN DIGITAL COM 958102105 20,539 7,937 62.98 1,695 98.01 0.1683
2017-02-10 2016-12-31 13F WESTERN DIGITAL COM 958102105 12,602 -30,856 -71.00 856 -66.31 0.0918
2016-11-09 2016-09-30 13F WESTERN DIGITAL COM 958102105 43,458 34,387 379.09 2,541 492.31 0.2646
2016-08-11 2016-06-30 13F WESTERN DIGITAL COM 958102105 9,071 -82,076 -90.05 429 -90.04 0.0308
2016-05-09 2016-03-31 13F WESTERN DIGITAL COM 958102105 91,147 43,016 89.37 4,306 49.00 0.3357
2016-02-05 2015-12-31 13F WESTERN DIGITAL COM 958102105 48,131 48,131 0.00 2,890 0.1952
2015-11-16 2015-09-30 13F WESTERN DIGITAL COM 958102105 0 -22,895 -100.00 0 -100.00
2015-08-14 2015-06-30 13F WESTERN DIGITAL COM 958102105 22,895 7,855 52.23 1,795 31.12 0.1757
2015-05-15 2015-03-31 13F WESTERN DIGITAL COM 958102105 15,040 12,793 569.34 1,369 449.80 0.1821
2015-02-17 2014-12-31 13F WESTERN DIGITAL COM 958102105 2,247 2,247 249 0.0709
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.