Western Digital Corporation
US ˙ NasdaqGS ˙ US9581021055

SecurityWDC / Western Digital Corporation
InstitutionNatixis Advisors, L.p.
Latest Disclosed Ownership423,953 shares
Latest Disclosed Value $ 114,675
Natixis Advisors, L.p. reports 13.67% increase in ownership of WDC / Western Digital Corporation

On May 13, 2026 - Natixis Advisors, L.p. filed a 13F-HR form disclosing ownership of 423,953 shares of Western Digital Corporation (US:WDC) valued at $114,675,047 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 372,984 shares of Western Digital Corporation. This represents a change in shares of 13.67% during the quarter. The current value of the position is $251,874,717 USD.

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 WESTERN DIGITAL COM 958102105 423,953 50,969 13.67 115 78.13 0.1595
2026-02-10 2025-12-31 13F WESTERN DIGITAL COM 958102105 372,984 7,380 2.02 64 48.84 0.0911
2025-11-13 2025-09-30 13F WESTERN DIGITAL CORP COM 958102105 365,604 136,424 59.53 44 207.14 0.0641
2025-08-13 2025-06-30 13F WESTERN DIGITAL COM 958102105 229,180 160,662 234.48 15 600.00 0.0233
2025-05-08 2025-03-31 13F WESTERN DIGITAL COM 958102105 68,518 -251 -0.36 3 -50.00 0.0051
2025-02-10 2024-12-31 13F WESTERN DIGITAL COM 958102105 68,769 -7,362 -9.67 4 -20.00 0.0077
2024-11-06 2024-09-30 13F WESTERN DIGITAL COM 958102105 76,131 6,455 9.26 5 0.00 0.0101
2024-08-01 2024-06-30 13F WESTERN DIGITAL COM 958102105 69,676 22,470 47.60 5 66.67 0.0115
2024-04-25 2024-03-31 13F WESTERN DIGITAL COM 958102105 47,206 8,350 21.49 3 50.00 0.0074
2024-02-06 2023-12-31 13F WESTERN DIGITAL COM 958102105 38,856 1,700 4.58 2 100.00 0.0054
2023-11-13 2023-09-30 13F WESTERN DIGITAL COM 958102105 37,156 338 0.92 2 0.00 0.0052
2023-08-15 2023-06-30 13F WESTERN DIGITAL COM 958102105 36,818 -15,065 -29.04 1 0.00 0.0043
2023-05-11 2023-03-31 13F WESTERN DIGITAL COM 958102105 51,883 19,715 61.29 2 0.00 0.0067
2023-01-27 2022-12-31 13F WESTERN DIGITAL COM 958102105 32,168 11,439 55.18 1 -99.85 0.0038
2022-11-14 2022-09-30 13F WESTERN DIGITAL COM 958102105 20,729 -154,624 -88.18 675 -91.41 0.0029
2022-08-12 2022-06-30 13F WESTERN DIGITAL COM 958102105 175,353 147,888 538.46 7,861 476.32 0.0346
2022-05-12 2022-03-31 13F WESTERN DIGITAL COM 958102105 27,465 16 0.06 1,364 -23.80 0.0052
2022-02-08 2021-12-31 13F WESTERN DIGITAL COM 958102105 27,449 2,093 8.25 1,790 25.09 0.0068
2021-11-15 2021-09-30 13F WESTERN DIGITAL COM 958102105 25,356 -6,658 -20.80 1,431 -37.18 0.0059
2021-08-12 2021-06-30 13F WESTERN DIGITAL COM 958102105 32,014 -265 -0.82 2,278 5.76 0.0106
2021-05-05 2021-03-31 13F WESTERN DIGITAL COM 958102105 32,279 -4,467 -12.16 2,154 5.85 0.0112
2021-02-12 2020-12-31 13F WESTERN DIGITAL COM 958102105 36,746 -214,773 -85.39 2,035 -77.86 0.0117
2020-11-12 2020-09-30 13F WESTERN DIGITAL COM 958102105 251,519 -43,317 -14.69 9,193 -29.38 0.0578
2020-08-11 2020-06-30 13F WESTERN DIGITAL COM 958102105 294,836 54,300 22.57 13,017 30.03 0.0864
2020-04-27 2020-03-31 13F WESTERN DIGITAL COM 958102105 240,536 33,855 16.38 10,011 -23.69 0.0816
2020-02-10 2019-12-31 13F WESTERN DIGITAL COM 958102105 206,681 25,205 13.89 13,118 21.20 0.0925
2019-11-12 2019-09-30 13F WESTERN DIGITAL COM 958102105 181,476 35,362 24.20 10,823 55.77 0.0859
2019-08-12 2019-06-30 13F WESTERN DIGITAL COM 958102105 146,114 -15,188 -9.42 6,948 -10.37 0.0567
2019-05-15 2019-03-31 13F/A-1 WESTERN DIGITAL COM 958102105 161,302 35,148 27.86 7,752 66.24 0.0679
2019-05-15 2019-03-31 13F WESTERN DIGITAL COM 958102105 161,302 35,148 7,752
2019-02-13 2018-12-31 13F/A-1 WESTERN DIGITAL COM 958102105 126,154 37,317 42.01 4,663 -10.33 0.0460
2019-02-13 2018-12-31 13F WESTERN DIGITAL COM 958102105 126,154 37,317 4,663
2018-11-13 2018-09-30 13F WESTERN DIGITAL COM 958102105 88,837 7,095 8.68 5,200 -17.81 0.0458
2018-08-14 2018-06-30 13F/A-1 WESTERN DIGITAL COM 958102105 81,742 -9,123 -10.04 6,327 -24.53 0.0604
2018-08-14 2018-06-30 13F WESTERN DIGITAL COM 958102105 81,742 6,327
2018-05-10 2018-03-31 13F WESTERN DIGITAL COM 958102105 90,865 2,884 3.28 8,384 19.82 0.0828
2018-02-14 2017-12-31 13F WESTERN DIGITAL COM 958102105 87,981 -2,986 -3.28 6,997 -10.97 0.0713
2017-11-14 2017-09-30 13F WESTERN DIGITAL COM 958102105 90,967 -3,561 -3.77 7,859 -6.16 0.0830
2017-07-27 2017-06-30 13F WESTERN DIGITAL COM 958102105 94,528 2,867 3.13 8,375 10.71 0.0906
2017-05-12 2017-03-31 13F WESTERN DIGITAL COM 958102105 91,661 -6,276 -6.41 7,565 13.67 0.0838
2017-02-07 2016-12-31 13F WESTERN DIGITAL COM 958102105 97,937 9,876 11.21 6,655 29.25 0.0800
2016-11-04 2016-09-30 13F WESTERN DIGITAL COM 958102105 88,061 -2,184 -2.42 5,149 20.73 0.0667
2016-08-01 2016-06-30 13F WESTERN DIGITAL COM 958102105 90,245 -8,053 -8.19 4,265 -8.16 0.0590
2016-05-06 2016-03-31 13F WESTERN DIGITAL COM 958102105 98,298 37,289 61.12 4,644 26.75 0.0695
2016-02-12 2015-12-31 13F WESTERN DIGITAL COM 958102105 61,009 48,073 371.62 3,664 256.42 0.0601
2015-11-12 2015-09-30 13F WESTERN DIGITAL COM 958102105 12,936 -1,125 -8.00 1,028 -6.80 0.0178
2015-08-14 2015-06-30 13F WESTERN DIGITAL COM 958102105 14,061 -1,970 -12.29 1,103 -24.40 0.0187
2015-05-15 2015-03-31 13F WESTERN DIGITAL COM 958102105 16,031 -1,165 -6.77 1,459 -23.37 0.0256
2015-02-05 2014-12-31 13F WESTERN DIGITAL COM 958102105 17,196 699 4.24 1,904 18.63 0.0356
2014-11-03 2014-09-30 13F WESTERN DIGITAL COM 958102105 16,497 897 5.75 1,605 11.46 0.0322
2014-08-13 2014-06-30 13F WESTERN DIGITAL COM 958102105 15,600 3,911 33.46 1,440 34.20 0.0206
2014-05-13 2014-03-31 13F WESTERN DIGITAL COM 958102105 11,689 409 3.63 1,073 13.42 0.0165
2014-02-12 2013-12-31 13F WESTERN DIGITAL COM 958102105 11,280 2,085 22.68 946 62.26 0.0155
2013-10-30 2013-09-30 13F WESTERN DIGITAL COM 958102105 9,195 2,308 33.51 583 36.21 0.0107
2013-07-19 2013-06-30 13F WESTERN DIGITAL COM 958102105 6,887 6,887 428 0.0085
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.