Western Digital Corporation
MX ˙ BMV ˙ US9581021055
SecurityMX:WDC / Western Digital Corporation
InstitutionAmalgamated Bank
Latest Disclosed Ownership68,989 shares
Latest Disclosed Value $ 18,661
Amalgamated Bank reports 2.54% increase in ownership of WDC / Western Digital Corporation

On May 8, 2026 - Amalgamated Bank filed a 13F-HR form disclosing ownership of 68,989 shares of Western Digital Corporation (MX:WDC) valued at $18,661 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 67,281 shares of Western Digital Corporation. This represents a change in shares of 2.54% 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)
2026-05-08 2026-03-31 13F WESTERN DIGITAL COM 958102105 68,989 1,708 2.54 19 63.64 0.1428
2026-02-05 2025-12-31 13F WESTERN DIGITAL COM 958102105 67,281 1,517 2.31 12 57.14 0.0837
2025-10-29 2025-09-30 13F WESTERN DIGITAL COM 958102105 65,764 -1,541 -2.29 8 75.00 0.0564
2025-08-04 2025-06-30 13F WESTERN DIGITAL COM 958102105 67,305 355 0.53 4 100.00 0.0332
2025-04-25 2025-03-31 13F WESTERN DIGITAL COM 958102105 66,950 1,093 1.66 3 -33.33 0.0232
2025-02-04 2024-12-31 13F WESTERN DIGITAL COM 958102105 65,857 1,711 2.67 4 -25.00 0.0322
2024-10-30 2024-09-30 13F WESTERN DIGITAL COM 958102105 64,146 -1,983 -3.00 4 -20.00 0.0361
2024-08-12 2024-06-30 13F WESTERN DIGITAL COM 958102105 66,129 -44,083 -40.00 5 -28.57 0.0427
2024-04-23 2024-03-31 13F WESTERN DIGITAL COM 958102105 110,212 29,079 35.84 8 75.00 0.0643
2024-02-06 2023-12-31 13F WESTERN DIGITAL COM 958102105 81,133 835 1.04 4 33.33 0.0339
2023-11-08 2023-09-30 13F WESTERN DIGITAL COM 958102105 80,298 -124 -0.15 4 0.00 0.0312
2023-08-11 2023-06-30 13F WESTERN DIGITAL COM 958102105 80,422 -919 -1.13 3 0.00 0.0247
2023-05-02 2023-03-31 13F WESTERN DIGITAL COM 958102105 81,341 -29,497 -26.61 3 0.00 0.0261
2023-02-10 2022-12-31 13F WESTERN DIGITAL COM 958102105 110,838 31,535 39.77 3 -99.88 0.0312
2022-11-09 2022-09-30 13F WESTERN DIGITAL COM 958102105 79,303 -5,111 -6.05 2,581 -31.79 0.0249
2022-08-15 2022-06-30 13F WESTERN DIGITAL COM 958102105 84,414 6,156 7.87 3,784 -2.62 0.0353
2022-08-25 2022-03-31 13F/A-1 WESTERN DIGITAL COM 958102105 78,258 -5,485 -6.55 3,886 -28.84 0.0302
2022-06-30 2022-03-31 13F WESTERN DIGITAL COM 958102105 78,258 -5,485 3,886 0.0309
2022-02-15 2021-12-31 13F/A-1 WESTERN DIGITAL COM 958102105 83,743 -11,210 -11.81 5,461 1.90 0.0403
2022-02-15 2021-12-31 13F WESTERN DIGITAL COM 958102105 83,743 -11,210 5,461 0.0403
2021-10-29 2021-09-30 13F WESTERN DIGITAL COM 958102105 94,953 -3,009 -3.07 5,359 -23.14 0.0452
2021-08-16 2021-06-30 13F WESTERN DIGITAL COM 958102105 97,962 81,318 488.57 6,972 527.54 0.0559
2021-05-13 2021-03-31 13F WESTERN DIGITAL COM 958102105 16,644 -589 -3.42 1,111 16.34 0.0417
2021-02-12 2020-12-31 13F WESTERN DIGITAL COM 958102105 17,233 172 1.01 955 53.04 0.0362
2020-10-30 2020-09-30 13F WESTERN DIGITAL COM 958102105 17,061 -313 -1.80 624 -18.64 0.0271
2020-08-10 2020-06-30 13F WESTERN DIGITAL COM 958102105 17,374 -25,373 -59.36 767 -56.89 0.0355
2020-05-13 2020-03-31 13F WESTERN DIGITAL COM 958102105 42,747 -1,598 -3.60 1,779 -36.80 0.0435
2020-02-13 2019-12-31 13F WESTERN DIGITAL COM 958102105 44,345 3,122 7.57 2,815 14.48 0.0518
2019-11-13 2019-09-30 13F WESTERN DIGITAL COM 958102105 41,223 -770 -1.83 2,459 23.13 0.0517
2019-08-14 2019-06-30 13F WESTERN DIGITAL COM 958102105 41,993 4,333 11.51 1,997 10.33 0.0466
2019-05-15 2019-03-31 13F WESTERN DIGITAL COM 958102105 37,660 973 2.65 1,810 33.48 0.0439
2019-02-15 2018-12-31 13F WESTERN DIGITAL COM 958102105 36,687 -944 -2.51 1,356 -38.45 0.0384
2018-11-14 2018-09-30 13F WESTERN DIGITAL COM 958102105 37,631 -889 -2.31 2,203 -26.12 0.0545
2018-07-18 2018-06-30 13F WESTERN DIGITAL COM 958102105 38,520 720 1.90 2,982 -14.51 0.0729
2018-05-22 2018-03-31 13F WESTERN DIGITAL COM 958102105 37,800 208 0.55 3,488 16.66 0.0925
2018-02-13 2017-12-31 13F WESTERN DIGITAL COM 958102105 37,592 3,811 11.28 2,990 2.43 0.0809
2017-11-09 2017-09-30 13F WESTERN DIGITAL COM 958102105 33,781 689 2.08 2,919 -0.44 0.0909
2017-08-10 2017-06-30 13F WESTERN DIGITAL COM 958102105 33,092 13,218 66.51 2,932 78.78 0.0961
2017-05-12 2017-03-31 13F WESTERN DIGITAL COM 958102105 19,874 1,137 6.07 1,640 28.83 0.0816
2017-02-14 2016-12-31 13F WESTERN DIGITAL COM 958102105 18,737 5,388 40.36 1,273 63.00 0.0575
2016-11-15 2016-09-30 13F/A-1 WESTERN DIGITAL COM 958102105 13,349 138 1.04 781 34.66 0.0453
2016-11-14 2016-09-30 13F WESTERN DIGITAL COM 958102105 6,005 351
2016-08-16 2016-06-30 13F WESTERN DIGITAL COM 958102105 13,211 5,119 63.26 580 51.83 0.0336
2016-05-11 2016-03-31 13F WESTERN DIGITAL COM 958102105 8,092 2,144 36.05 382 7.00 0.0372
2016-02-10 2015-12-31 13F WESTERN DIGITAL COM 958102105 5,948 -1,910 -24.31 357 -42.79 0.0440
2015-11-04 2015-09-30 13F WESTERN DIGITAL COM 958102105 7,858 307 4.07 624 5.41 0.0655
2015-07-10 2015-06-30 13F WESTERN DIGITAL COM 958102105 7,551 498 7.06 592 -7.79 0.0581
2015-04-22 2015-03-31 13F WESTERN DIGITAL COM 958102105 7,053 7,053 0.00 642 0.0784
2015-01-29 2014-12-31 13F WESTERN DIGITAL COM 958102105 0 -6,138 -100.00 0 -100.00
2014-11-14 2014-09-30 13F WESTERN DIGITAL COM 958102105 6,138 112 1.86 597 7.37 0.0888
2014-08-11 2014-06-30 13F WESTERN DIGITAL COM 958102105 6,026 889 17.31 556 17.80 0.0839
2014-05-12 2014-03-31 13F WESTERN DIGITAL COM 958102105 5,137 -99 -1.89 472 7.52 0.0813
2014-02-13 2013-12-31 13F WESTERN DIGITAL COM 958102105 5,236 5,236 -6.93 439 55.12 0.0746
2013-11-14 2013-09-30 13F WESTERN DIGITAL COM 958102105 0 0 0 0.0000
2013-08-15 2013-06-30 13F WESTERN DIGITAL COM 958102105 0 -5,626 -100.00 0 -100.00
2014-02-13 2013-03-31 13F WESTERN DIGITAL COM 958102105 5,626 5,626 283 0.0803
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.