Western Digital Corporation
MX ˙ BMV ˙ US9581021055
SecurityMX:WDC / Western Digital Corporation
InstitutionBessemer Group Inc
Latest Disclosed Ownership15,465 shares
Latest Disclosed Value $ 4,184
Bessemer Group Inc reports 23.04% increase in ownership of WDC / Western Digital Corporation

On May 6, 2026 - Bessemer Group Inc filed a 13F-HR form disclosing ownership of 15,465 shares of Western Digital Corporation (MX:WDC) valued at $4,184 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 12,569 shares of Western Digital Corporation. This represents a change in shares of 23.04% 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)
2026-05-06 2026-03-31 13F WESTERN DIGITAL SC 958102105 15,465 2,896 23.04 4 100.00 0.0066
2026-02-05 2025-12-31 13F WESTERN DIGITAL SC 958102105 12,569 1,168 10.24 2 100.00 0.0033
2025-11-05 2025-09-30 13F WESTERN DIGITAL SC 958102105 11,401 8,439 284.91 1 0.0021
2025-08-01 2025-06-30 13F WESTERN DIGITAL SC 958102105 2,962 5 0.17 0 0.0003
2025-04-23 2025-03-31 13F WESTERN DIGITAL SC 958102105 2,957 -39 -1.30 0 0.0002
2025-02-13 2024-12-31 13F WESTERN DIGITAL SC 958102105 2,996 146 5.12 0 0.0003
2024-11-12 2024-09-30 13F WESTERN DIGITAL SC 958102105 2,850 -45 -1.55 0 0.0003
2024-08-13 2024-06-30 13F WESTERN DIGITAL SC 958102105 2,895 276 10.54 0 0.0004
2024-08-13 2024-03-31 13F/A-1 WESTERN DIGITAL SC 958102105 2,619 583 28.63 0 0.0003
2024-05-13 2024-03-31 13F WESTERN DIGITAL SC 958102105 2,619 583 0 0.0003
2024-02-09 2023-12-31 13F WESTERN DIGITAL SC 958102105 2,036 6 0.30 0 0.0002
2023-11-13 2023-09-30 13F WESTERN DIGITAL SC 958102105 2,030 -1,059 -34.28 0 0.0002
2023-08-10 2023-06-30 13F WESTERN DIGITAL SC 958102105 3,089 761 32.69 0 0.0002
2023-05-10 2023-03-31 13F WESTERN DIGITAL SC 958102105 2,328 -124 -5.06 0 0.0002
2023-02-13 2022-12-31 13F WESTERN DIGITAL SC 958102105 2,452 -5,063 -67.37 0 -100.00 0.0002
2022-11-09 2022-09-30 13F WESTERN DIGITAL SC 958102105 7,515 -3,876 -34.03 245 -52.05 0.0006
2022-08-10 2022-06-30 13F WESTERN DIGITAL SC 958102105 11,391 -403 -3.42 511 -12.80 0.0013
2022-05-12 2022-03-31 13F WESTERN DIGITAL SC 958102105 11,794 824 7.51 586 -18.04 0.0012
2022-01-27 2021-12-31 13F WESTERN DIGITAL SC 958102105 10,970 1,255 12.92 715 30.24 0.0014
2021-11-12 2021-09-30 13F WESTERN DIGITAL SC 958102105 9,715 1,601 19.73 549 -5.02 0.0012
2021-08-06 2021-06-30 13F WESTERN DIGITAL SC 958102105 8,114 -1,127 -12.20 578 -6.17 0.0013
2021-05-13 2021-03-31 13F WESTERN DIGITAL SC 958102105 9,241 -1,176 -11.29 616 6.76 0.0015
2021-02-09 2020-12-31 13F WESTERN DIGITAL SC 958102105 10,417 1,546 17.43 577 78.09 0.0015
2020-11-12 2020-09-30 13F WESTERN DIGITAL SC 958102105 8,871 1,548 21.14 324 0.31 0.0010
2020-08-05 2020-06-30 13F WESTERN DIGITAL SC 958102105 7,323 529 7.79 323 14.13 0.0010
2020-04-30 2020-03-31 13F WESTERN DIGITAL SC 958102105 6,794 -1,195 -14.96 283 -44.18 0.0011
2020-02-04 2019-12-31 13F WESTERN DIGITAL SC 958102105 7,989 1,354 20.41 507 28.03 0.0016
2019-11-07 2019-09-30 13F WESTERN DIGITAL SC 958102105 6,635 -5,033 -43.14 396 -28.65 0.0014
2019-07-19 2019-06-30 13F WESTERN DIGITAL SC 958102105 11,668 2,439 26.43 555 25.00 0.0019
2019-05-13 2019-03-31 13F WESTERN DIGITAL SC 958102105 9,229 1,429 18.32 444 54.17 0.0017
2019-05-21 2018-12-31 13F/A-1 WESTERN DIGITAL SC 958102105 7,800 2,406 44.61 288 -8.57 0.0013
2019-02-12 2018-12-31 13F WESTERN DIGITAL SC 958102105 7,800 2,406 288 0.0013
2018-11-06 2018-09-30 13F WESTERN DIGITAL SC 958102105 5,394 1,088 25.27 315 -5.69 0.0012
2018-07-25 2018-06-30 13F WESTERN DIGITAL SC 958102105 4,306 0 0.00 334 -16.08 0.0013
2018-05-10 2018-03-31 13F WESTERN DIGITAL SC 958102105 4,306 -335 -7.22 398 7.86 0.0015
2018-01-30 2017-12-31 13F WESTERN DIGITAL SC 958102105 4,641 255 5.81 369 -2.64 0.0014
2017-11-03 2017-09-30 13F WESTERN DIGITAL SC 958102105 4,386 655 17.56 379 14.85 0.0015
2017-07-27 2017-06-30 13F WESTERN DIGITAL SC 958102105 3,731 -8,599 -69.74 330 -67.55 0.0013
2017-05-12 2017-03-31 13F WESTERN DIGITAL SC 958102105 12,330 7,558 158.38 1,017 212.92 0.0042
2017-02-07 2016-12-31 13F WESTERN DIGITAL SC 958102105 4,772 -351 -6.85 325 8.33 0.0015
2016-11-10 2016-09-30 13F WESTERN DIGITAL SC 958102105 5,123 -819 -13.78 300 6.76 0.0015
2016-08-11 2016-06-30 13F WESTERN DIGITAL SC 958102105 5,942 -17,177 -74.30 281 -74.29 0.0015
2016-05-11 2016-03-31 13F WESTERN DIGITAL SC 958102105 23,119 20,229 699.97 1,093 528.16 0.0062
2016-02-12 2015-12-31 13F WESTERN DIGITAL SC 958102105 2,890 1,850 177.88 174 109.64 0.0010
2015-11-16 2015-09-30 13F WESTERN DIGITAL SC 958102105 1,040 -20,640 -95.20 83 -95.12 0.0005
2015-08-14 2015-06-30 13F WESTERN DIGITAL SC 958102105 21,680 318 1.49 1,700 -12.51 0.0089
2015-06-18 2015-03-31 13F/A-1 WESTERN DIGITAL SC 958102105 21,362 5 0.02 1,943 -17.81 0.0099
2015-05-14 2015-03-31 13F WESTERN DIGITAL SC 958102105 21,362 1,943
2015-02-17 2014-12-31 13F WESTERN DIGITAL SC 958102105 21,357 11,444 115.44 2,364 144.97 0.0127
2014-12-11 2014-09-30 13F/A-1 WESTERN DIGITAL SC 958102105 9,913 0 0.00 965 5.46 0.0055
2014-11-13 2014-09-30 13F WESTERN DIGITAL SC 958102105 970 -8,943 95 0.0006
2014-08-13 2014-06-30 13F WESTERN DIGITAL SC 958102105 9,913 0 0.00 915 0.55 0.0056
2014-05-14 2014-03-31 13F WESTERN DIGITAL SC 958102105 9,913 -1,125,245 -99.13 910 -99.04 0.0061
2014-02-18 2013-12-31 13F WESTERN DIGITAL SC 958102105 1,135,158 -8,470 -0.74 95,242 31.36 0.6823
2013-11-08 2013-09-30 13F WESTERN DIGITAL SC 958102105 1,143,628 -316,057 -21.65 72,507 -20.00 0.5883
2013-08-14 2013-06-30 13F WESTERN DIGITAL SC 958102105 1,459,685 1,459,685 90,630 0.8127
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.