Western Digital Corporation
MX ˙ BMV ˙ US9581021055
SecurityMX:WDC / Western Digital Corporation
InstitutionBaird Financial Group, Inc.
Latest Disclosed Ownership36,938 shares
Latest Disclosed Value $ 9,991,360
Baird Financial Group, Inc. reports 422.83% increase in ownership of WDC / Western Digital Corporation

On May 14, 2026 - Baird Financial Group, Inc. filed a 13F-HR form disclosing ownership of 36,938 shares of Western Digital Corporation (MX:WDC) valued at $9,991,360 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 7,065 shares of Western Digital Corporation. This represents a change in shares of 422.83% 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)
2026-05-14 2026-03-31 13F WESTERN DIGITAL COM 958102105 36,938 29,873 422.83 9,991 720.95 0.0084
2026-02-13 2025-12-31 13F WESTERN DIGITAL CORP COM COMMON 958102105 7,065 139 2.01 1,217 46.45 0.0019
2025-11-13 2025-09-30 13F WESTERN DIGITAL COMMON 958102105 6,926 414 6.36 832 99.76 0.0013
2025-08-13 2025-06-30 13F WESTERN DIGITAL CORP COM COMMON 958102105 6,512 -200 -2.98 417 53.51 0.0007
2025-05-15 2025-03-31 13F WESTERN DIGITAL CORP COM COMMON 958102105 6,712 -411 -5.77 271 -36.08 0.0005
2025-02-14 2024-12-31 13F WESTERN DIGITAL COMMON 958102105 7,123 -52,401 -88.03 425 -89.57 0.0008
2024-11-14 2024-09-30 13F WESTERN DIGITAL COMMON 958102105 59,524 -4,921 -7.64 4,065 -16.76 0.0079
2024-08-14 2024-06-30 13F WESTERN DIGITAL COMMON 958102105 64,445 -1,403 -2.13 4,883 8.66 0.0101
2024-05-14 2024-03-31 13F WESTERN DIGITAL COMMON 958102105 65,848 58,598 808.25 4,493 1,085.49 0.0094
2024-02-14 2023-12-31 13F WESTERN DIGITAL COMMON 958102105 7,250 -2,316 -24.21 380 -13.07 0.0009
2023-11-13 2023-09-30 13F WESTERN DIGITAL COMMON 958102105 9,566 23 0.24 436 20.78 0.0012
2023-08-11 2023-06-30 13F WESTERN DIGITAL COMMON 958102105 9,543 1,023 12.01 362 12.81 0.0010
2023-05-15 2023-03-31 13F WESTERN DIGITAL COMMON 958102105 8,520 -165 -1.90 321 0.0008
2023-02-13 2022-12-31 13F WESTERN DIGITAL COMMON 958102105 8,685 -1,649 -15.96 0 -100.00 0.0007
2022-11-15 2022-09-30 13F WESTERN DIGITAL COMMON 958102105 10,334 -198 -1.88 337 -28.60 0.0010
2022-08-08 2022-06-30 13F WESTERN DIGITAL COMMON 958102105 10,532 -86 -0.81 472 -10.44 0.0013
2022-05-13 2022-03-31 13F WESTERN DIGITAL COMMON 958102105 10,618 406 3.98 527 -20.87 0.0013
2022-02-09 2021-12-31 13F WESTERN DIGITAL COMMON 958102105 10,212 -215 -2.06 666 13.07 0.0016
2021-11-12 2021-09-30 13F WESTERN DIGITAL COMMON 958102105 10,427 85 0.82 589 -19.97 0.0015
2021-08-11 2021-06-30 13F WESTERN DIGITAL COMMON 958102105 10,342 -2,337 -18.43 736 -13.00 0.0019
2021-05-13 2021-03-31 13F WESTERN DIGITAL COMMON 958102105 12,679 -943 -6.92 846 12.05 0.0024
2021-02-11 2020-12-31 13F WESTERN DIGITAL COMMON 958102105 13,622 -390 -2.78 755 47.46 0.0023
2020-11-12 2020-09-30 13F WESTERN DIGITAL COMMON 958102105 14,012 -22,244 -61.35 512 -68.02 0.0018
2020-10-22 2020-06-30 13F/A-1 WESTERN DIGITAL COMMON 958102105 36,256 24,002 195.87 1,601 213.92 0.0060
2020-08-14 2020-06-30 13F WESTERN DIGITAL COMMON 958102105 36,283 24,029 1,822 3,610.7900
2020-05-14 2020-03-31 13F WESTERN DIGITAL COMMON 958102105 12,254 1,026 9.14 510 -28.47 0.0023
2020-02-14 2019-12-31 13F WESTERN DIGITAL COMMON 958102105 11,228 -2,198 -16.37 713 -10.87 0.0026
2019-11-14 2019-09-30 13F WESTERN DIGITAL Common 958102105 13,426 738 5.82 800 32.67 0.0032
2019-08-14 2019-06-30 13F WESTERN DIGITAL COMMON 958102105 12,688 -12,171 -48.96 603 -49.54 0.0023
2019-05-14 2019-03-31 13F WESTERN DIGITAL COMMON 958102105 24,859 -4,599 -15.61 1,195 9.73 0.0070
2019-02-14 2018-12-31 13F WESTERN DIGITAL COMMON 958102105 29,458 17,005 136.55 1,089 50.62 0.0074
2018-11-13 2018-09-30 13F WESTERN DIGITAL COMMON 958102105 12,453 4,966 66.33 723 24.66 0.0045
2018-08-13 2018-06-30 13F Western Digital COMMON 958102105 7,487 415 5.87 580 -11.18 0.0039
2018-05-14 2018-03-31 13F WESTERN DIGITAL COMMON 958102105 7,072 -252 -3.44 653 12.20 0.0046
2018-02-09 2017-12-31 13F WESTERN DIGITAL COMMON 958102105 7,324 -45 -0.61 582 -8.63 0.0041
2017-11-14 2017-09-30 13F WESTERN DIGITAL COMMON 958102105 7,369 -5,134 -41.06 637 -42.51 0.0048
2017-08-14 2017-06-30 13F WESTERN DIGITAL COMMON 958102105 12,503 -3,791 -23.27 1,108 -17.62 0.0087
2017-06-19 2017-03-31 13F/A-1 WESTERN DIGITAL COMMON 958102105 16,294 3,516 27.52 1,345 54.95 0.0109
2017-05-09 2017-03-31 13F WESTERN DIGITAL COMMON 958102105 16,294 1,345
2017-02-10 2016-12-31 13F WESTERN DIGITAL COMMON 958102105 12,778 -5,943 -31.75 868 -20.73 0.0075
2016-11-10 2016-09-30 13F WESTERN DIGITAL COMMON 958102105 18,721 1,212 6.92 1,095 32.09 0.0098
2016-08-11 2016-06-30 13F WESTERN DIGITAL COMMON 958102105 17,509 -1,145 -6.14 829 -5.90 0.0076
2016-05-12 2016-03-31 13F WESTERN DIGITAL COMMON 958102105 18,654 -35,950 -65.84 881 -73.13 0.0084
2016-02-11 2015-12-31 13F WESTERN DIGITAL COMMON 958102105 54,604 -4,700 -7.93 3,279 -30.41 0.0328
2015-11-12 2015-09-30 13F WESTERN DIGITAL COMMON 958102105 59,304 8,521 16.78 4,712 18.30 0.0501
2015-08-14 2015-06-30 13F WESTERN DIGITAL COMMON 958102105 50,783 50,783 3,983 0.0392
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.