Western Digital Corporation
MX ˙ BMV ˙ US9581021055
SecurityMX:WDC / Western Digital Corporation
InstitutionQuadrant Capital Group Llc
Latest Disclosed Ownership15,626 shares
Latest Disclosed Value $ 4,226,677
Quadrant Capital Group Llc reports 2.20% decrease in ownership of WDC / Western Digital Corporation

On May 13, 2026 - Quadrant Capital Group Llc filed a 13F-HR/A form disclosing ownership of 15,626 shares of Western Digital Corporation (MX:WDC) valued at $4,226,677 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 15,978 shares of Western Digital Corporation. This represents a change in shares of -2.20% 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)
2026-05-13 2026-03-31 13F/A-1 WESTERN DIGITAL COM 958102105 15,626 -352 -2.20 4,227 53.56 0.1264
2026-05-11 2026-03-31 13F WESTERN DIGITAL COM 958102105 15,626 -352 49 0.0369
2026-02-12 2025-12-31 13F WESTERN DIGITAL COM 958102105 15,978 329 2.10 2,753 46.54 0.0832
2025-11-13 2025-09-30 13F WESTERN DIGITAL COM 958102105 15,649 125 0.81 1,879 89.12 0.0611
2025-08-13 2025-06-30 13F WESTERN DIGITAL COM 958102105 15,524 12,517 416.26 993 720.66 0.0358
2025-05-13 2025-03-31 13F WESTERN DIGITAL COM 958102105 3,007 312 11.58 122 -24.37 0.0045
2025-02-13 2024-12-31 13F WESTERN DIGITAL COM 958102105 2,695 -78 -2.81 161 -15.34 0.0111
2024-11-12 2024-09-30 13F WESTERN DIGITAL COM 958102105 2,773 -337 -10.84 189 -19.57 0.0132
2024-08-12 2024-06-30 13F WESTERN DIGITAL COM 958102105 3,110 65 2.13 236 13.53 0.0175
2024-05-15 2024-03-31 13F WESTERN DIGITAL COM 958102105 3,045 178 6.21 208 38.00 0.0164
2024-02-08 2023-12-31 13F WESTERN DIGITAL COM 958102105 2,867 619 27.54 150 47.06 0.0129
2023-11-14 2023-09-30 13F WESTERN DIGITAL COM 958102105 2,248 -179 -7.38 103 10.87 0.0103
2023-08-10 2023-06-30 13F WESTERN DIGITAL COM 958102105 2,427 800 49.17 92 50.82 0.0091
2023-05-11 2023-03-31 13F WESTERN DIGITAL COM 958102105 1,627 119 7.89 61 29.79 0.0064
2023-02-13 2022-12-31 13F WESTERN DIGITAL COM 958102105 1,508 951 170.74 48 161.11 0.0054
2022-11-10 2022-09-30 13F WESTERN DIGITAL COM 958102105 557 -326 -36.92 18 -55.00 0.0024
2022-08-09 2022-06-30 13F WESTERN DIGITAL COM 958102105 883 457 107.28 40 90.48 0.0054
2022-05-06 2022-03-31 13F WESTERN DIGITAL COM 958102105 426 -100 -19.01 21 -38.24 0.0025
2022-02-01 2021-12-31 13F WESTERN DIGITAL COM 958102105 526 224 74.17 34 100.00 0.0041
2021-11-12 2021-09-30 13F WESTERN DIGITAL COM 958102105 302 -54 -15.17 17 -32.00 0.0024
2021-08-09 2021-06-30 13F WESTERN DIGITAL COM 958102105 356 69 24.04 25 31.58 0.0036
2021-05-12 2021-03-31 13F WESTERN DIGITAL COM 958102105 287 57 24.78 19 46.15 0.0031
2021-02-16 2020-12-31 13F WESTERN DIGITAL COM 958102105 230 104 82.54 13 160.00 0.0024
2020-11-13 2020-09-30 13F WESTERN DIGITAL COM 958102105 126 -575 -82.03 5 -83.87 0.0011
2020-08-13 2020-06-30 13F WESTERN DIGITAL COM 958102105 701 -1,057 -60.13 31 -56.34 0.0069
2020-05-15 2020-03-31 13F Western Digital Com 958102105 1,758 -409 -18.87 71 -44.96 0.0119
2020-03-19 2019-12-31 13F/A-1 Western Digital Com 958102105 2,167 24 1.12 129 6.61 0.0156
2020-02-03 2019-12-31 13F Western Digital Com 958102105 2,167 24 129 435.9078
2019-10-24 2019-09-30 13F Western Digital COM 958102105 2,143 1,591 288.22 121 450.00 0.0186
2019-07-24 2019-06-30 13F Western Digital COM 958102105 552 -827 -59.97 22 -63.93 0.0035
2019-04-29 2019-03-31 13F Western Digital COM 958102105 1,379 1,014 277.81 61 577.78 0.0107
2019-01-17 2018-12-31 13F WESTERN DIGITAL COM 958102105 365 -210 -36.52 9 -64.00 0.0024
2018-10-29 2018-09-30 13F WESTERN DIGITAL COM 958102105 575 -34 -5.58 25 -39.02 0.0071
2018-08-08 2018-06-30 13F WESTERN DIGITAL COM 958102105 609 -8 -1.30 41 -16.33 0.0144
2018-05-10 2018-03-31 13F WESTERN DIGITAL COM 958102105 617 23 3.87 49 13.95 0.0178
2018-01-31 2017-12-31 13F Western Digital COM 958102105 594 42 7.61 43 0.00 0.0171
2017-10-13 2017-09-30 13F Western Digital COM 958102105 552 0 0.00 43 13.16 0.0177
2017-08-14 2017-06-30 13F Western Digital COM 958102105 552 0 0.00 38 -7.32 0.0168
2017-04-10 2017-03-31 13F Western Digital COM 958102105 552 -350 -38.80 41 -26.79 0.0180
2017-01-11 2016-12-31 13F Western Digital COM 958102105 902 -2 -0.22 56 21.74 0.0281
2016-10-25 2016-09-30 13F Western Digital COM 958102105 904 31 3.55 46 27.78 0.0300
2016-07-28 2016-06-30 13F Western Digital COM 958102105 873 558 177.14 36 157.14 0.0248
2016-04-27 2016-03-31 13F Western Digital COM 958102105 315 -1 -0.32 14 -17.65 0.0091
2016-01-28 2015-12-31 13F Western Digital COM 958102105 316 -267 -45.80 17 -63.04 0.0118
2015-10-28 2015-09-30 13F Western Digital COM 958102105 583 -97 -14.26 46 -13.21 0.0317
2015-08-12 2015-06-30 13F Western Digital COM 958102105 680 680 53 0.0337
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.