Western Digital Corporation
CH ˙ BRSE ˙ US9581021055
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT
SecurityCH:12355 / Western Digital Corporation
InstitutionGeode Capital Management, Llc
Latest Disclosed Ownership9,477,201 shares
Latest Disclosed Value $ 2,556,976,225
Geode Capital Management, Llc reports 2.10% increase in ownership of 12355 / Western Digital Corporation

On May 15, 2026 - Geode Capital Management, Llc filed a 13F-HR form disclosing ownership of 9,477,201 shares of Western Digital Corporation (CH:12355) valued at $2,556,976,225 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 9,282,432 shares of Western Digital Corporation. This represents a change in shares of 2.10% 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)
2026-05-15 2026-03-31 13F WESTERN DIGITAL COM 958102105 9,477,201 194,769 2.10 2,556,976 60.42 0.0850
2026-02-09 2025-12-31 13F WESTERN DIGITAL COM 958102105 9,282,432 -132,086 -1.40 1,593,883 41.57 0.0984
2025-11-12 2025-09-30 13F WESTERN DIGITAL COM 958102105 9,414,518 109,229 1.17 1,125,853 89.84 0.0718
2025-08-08 2025-06-30 13F WESTERN DIGITAL COM 958102105 9,305,289 186,030 2.04 593,045 61.35 0.0416
2025-05-13 2025-03-31 13F WESTERN DIGITAL COM 958102105 9,119,259 373,995 4.28 367,547 -29.38 0.0289
2025-02-12 2024-12-31 13F WESTERN DIGITAL COM 958102105 8,745,264 823,656 10.40 520,450 -3.51 0.0403
2024-11-12 2024-09-30 13F WESTERN DIGITAL COM 958102105 7,921,608 76,781 0.98 539,355 -9.02 0.0437
2024-08-09 2024-06-30 13F WESTERN DIGITAL COM 958102105 7,844,827 185,511 2.42 592,845 13.72 0.0520
2024-05-13 2024-03-31 13F WESTERN DIGITAL COM 958102105 7,659,316 240,664 3.24 521,328 34.53 0.0482
2024-02-13 2023-12-31 13F WESTERN DIGITAL COM 958102105 7,418,652 252,486 3.52 387,532 18.76 0.0405
2023-11-13 2023-09-30 13F WESTERN DIGITAL COM 958102105 7,166,166 123,737 1.76 326,307 22.47 0.0389
2023-08-11 2023-06-30 13F WESTERN DIGITAL COM 958102105 7,042,429 212,758 3.12 266,449 3.79 0.0313
2023-05-15 2023-03-31 13F WESTERN DIGITAL COM 958102105 6,829,671 14,928 0.22 256,713 119,858.88 0.0333
2023-02-13 2022-12-31 13F WESTERN DIGITAL COM 958102105 6,814,743 163,307 2.46 215 -99.90 0.0301
2022-11-14 2022-09-30 13F WESTERN DIGITAL COM 958102105 6,651,436 129,377 1.98 216,328 -25.90 0.0328
2022-08-12 2022-06-30 13F WESTERN DIGITAL COM 958102105 6,522,059 107,972 1.68 291,956 -8.14 0.0428
2022-05-13 2022-03-31 13F WESTERN DIGITAL COM 958102105 6,414,087 105,952 1.68 317,822 -22.56 0.0397
2022-02-11 2021-12-31 13F WESTERN DIGITAL COM 958102105 6,308,135 343,751 5.76 410,390 22.21 0.0494
2021-11-12 2021-09-30 13F WESTERN DIGITAL COM 958102105 5,964,384 315,600 5.59 335,813 -16.25 0.0452
2021-08-13 2021-06-30 13F WESTERN DIGITAL COM 958102105 5,648,784 180,222 3.30 400,955 10.12 0.0552
2021-05-12 2021-03-31 13F WESTERN DIGITAL COM 958102105 5,468,562 120,120 2.25 364,092 23.19 0.0557
2021-02-12 2020-12-31 13F WESTERN DIGITAL COM 958102105 5,348,442 106,318 2.03 295,552 54.55 0.0496
2020-11-13 2020-09-30 13F WESTERN DIGITAL COM 958102105 5,242,124 31,621 0.61 191,234 -16.73 0.0375
2020-08-13 2020-06-30 13F WESTERN DIGITAL COM 958102105 5,210,503 279,737 5.67 229,642 12.11 0.0491
2020-05-14 2020-03-31 13F WESTERN DIGITAL COM 958102105 4,930,766 -75,609 -1.51 204,842 -35.46 0.0534
2020-02-20 2019-12-31 13F/A-1 WESTERN DIGITAL COM 958102105 5,006,375 360,207 7.75 317,389 14.61 0.0663
2020-02-13 2019-12-31 13F WESTERN DIGITAL COM 958102105 5,006,375 360,207 317,389 40,448.4452
2019-11-12 2019-09-30 13F WESTERN DIGITAL COM 958102105 4,646,168 30,059 0.65 276,925 26.37 0.0646
2019-08-14 2019-06-30 13F WESTERN DIGITAL COM 958102105 4,616,109 -382,555 -7.65 219,142 -8.73 0.0530
2019-05-14 2019-03-31 13F WESTERN DIGITAL COM 958102105 4,998,664 267,933 5.66 240,094 37.43 0.0622
2019-03-06 2018-12-31 13F/A-1 WESTERN DIGITAL COM 958102105 4,730,731 179,818 3.95 174,707 -34.33 0.0540
2019-02-13 2018-12-31 13F WESTERN DIGITAL COM 958102105 4,730,731 179,818 174,707
2018-11-13 2018-09-30 13F WESTERN DIGITAL COM 958102105 4,550,913 125,704 2.84 266,036 -22.21 0.0750
2018-08-14 2018-06-30 13F WESTERN DIGITAL COM 958102105 4,425,209 266,921 6.42 342,002 -10.69 0.1051
2018-05-15 2018-03-31 13F WESTERN DIGITAL COM 958102105 4,158,288 239,058 6.10 382,929 23.06 0.1248
2018-02-13 2017-12-31 13F WESTERN DIGITAL COM 958102105 3,919,230 171,959 4.59 311,171 -3.74 0.1057
2017-11-14 2017-09-30 13F WESTERN DIGITAL COM 958102105 3,747,271 586,768 18.57 323,254 15.62 0.1193
2017-08-14 2017-06-30 13F WESTERN DIGITAL COM 958102105 3,160,503 129,139 4.26 279,580 11.90 0.1099
2017-06-21 2017-03-31 13F/A-1 WESTERN DIGITAL CORP COM COM 958102105 3,031,364 264,706 9.57 249,848 33.05 0.1025
2017-05-12 2017-03-31 13F WESTERN DIGITAL CORP COM COM 958102105 3,031,364 249,848
2017-02-14 2016-12-31 13F WESTERN DIGITAL CORP COM COM 958102105 2,766,658 -84,139 -2.95 187,782 12.81 0.0873
2016-11-10 2016-09-30 13F WESTERN DIGITAL CORP COM COM 958102105 2,850,797 104,157 3.79 166,459 28.43 0.0838
2016-08-12 2016-06-30 13F WESTERN DIGITAL CORP COM COM 958102105 2,746,640 316,249 13.01 129,614 13.07 0.0705
2016-05-13 2016-03-31 13F WESTERN DIGITAL CORP COM COM 958102105 2,430,391 244,462 11.18 114,629 -12.52 0.0608
2016-02-12 2015-12-31 13F WESTERN DIGITAL CORP COM COM 958102105 2,185,929 251,280 12.99 131,035 -14.58 0.0747
2015-11-13 2015-09-30 13F WESTERN DIGITAL CORP COM COM 958102105 1,934,649 31,574 1.66 153,405 2.98 0.0930
2015-08-14 2015-06-30 13F WESTERN DIGITAL CORP COM COM 958102105 1,903,075 -9,098 -0.48 148,969 -14.28 0.0850
2015-05-14 2015-03-31 13F WESTERN DIGITAL CORP COM COM 958102105 1,912,173 76,529 4.17 173,783 -14.38 0.0993
2015-02-12 2014-12-31 13F WESTERN DIGITAL CORP COM COM 958102105 1,835,644 55,031 3.09 202,969 17.26 0.1208
2014-11-14 2014-09-30 13F WESTERN DIGITAL CORP COM COM 958102105 1,780,613 143,288 8.75 173,088 14.60 0.1122
2014-08-13 2014-06-30 13F WESTERN DIGITAL CORP COM COM 958102105 1,637,325 -64,047 -3.76 151,037 -3.28 0.0977
2014-05-14 2014-03-31 13F WESTERN DIGITAL CORP COM COM 958102105 1,701,372 23,938 1.43 156,158 10.99 0.1047
2014-02-14 2013-12-31 13F WESTERN DIGITAL CORP COM COM 958102105 1,677,434 75,220 4.69 140,698 38.54 0.0975
2013-11-14 2013-09-30 13F WESTERN DIGITAL CORP COM COM 958102105 1,602,214 26,990 1.71 101,558 3.86 0.0814
2013-08-14 2013-06-30 13F WESTERN DIGITAL CORP COM COM 958102105 1,575,224 1,575,224 97,787 0.0860
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.