Fmr Llc ownership in WDC / Western Digital Corporation

Western Digital Corporation

US ˙ NasdaqGS ˙ US9581021055

Security	WDC / Western Digital Corporation
Institution	Fmr Llc
Latest Disclosed Ownership	34,466,664 shares
Ownership	10.10%

2026-01-08 - Fmr Llc has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 34,466,664 shares of Western Digital Corporation (US:WDC). This represents 10.1 percent ownership of the company. In their previous filing dated 2025-11-05 , Fmr Llc had reported owning 24,405,723 shares, indicating an increase of 41.22 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File Date	Effective Date	Form	Prev Shares	Latest Shares	ΔShares (Percent)	Ownership (Percent)	ΔOwnership (Percent)
2026-01-08	2026-01-08	13G/A	24,405,723	34,466,664	41.22	10.10	44.29
2025-11-05	2025-11-05	13G/A	33,239,190	24,405,723	-26.58	7.00	-26.32
2025-08-06	2025-08-06	13G/A	28,141,054	33,239,190	18.12	9.50	17.28
2025-05-12	2025-05-12	13G/A	24,032,328	28,141,054	17.10	8.10	17.39
2025-02-12	2025-02-12	13G/A	19,391,748	24,032,328	23.93	6.90	22.38
2024-11-12	2024-11-12	13G	5,761,274	19,391,748	236.59	5.64	179.39
2017-02-14	2017-02-14	13G/A	13,152,898	5,761,274	-56.20	2.02	-64.45
2016-02-12	2016-02-12	13G		13,152,898		5.68

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-05-15	2026-03-31	13F	WESTERN DIGITAL	COM	958102105	31,623,418	-2,170,383	-6.42	8,553,818	46.93	0.4506
2026-02-17	2025-12-31	13F	WESTERN DIGITAL	COM	958102105	33,793,801	10,037,079	42.25	5,821,658	104.11	0.2968
2025-11-13	2025-09-30	13F	WESTERN DIGITAL	COM	958102105	23,756,722	-8,504,412	-26.36	2,852,232	38.16	0.1483
2025-08-14	2025-06-30	13F	WESTERN DIGITAL	COM	958102105	32,261,134	4,719,725	17.14	2,064,390	85.40	0.1164
2025-05-12	2025-03-31	13F	WESTERN DIGITAL	COM	958102105	27,541,409	3,974,498	16.86	1,113,499	-20.76	0.0711
2025-02-13	2024-12-31	13F	WESTERN DIGITAL	COM	958102105	23,566,911	4,614,716	24.35	1,405,295	8.58	0.0839
2024-11-13	2024-09-30	13F	WESTERN DIGITAL	COM	958102105	18,952,195	-1,620,790	-7.88	1,294,245	-16.97	0.0788
2024-08-13	2024-06-30	13F	WESTERN DIGITAL	COM	958102105	20,572,985	16,221,079	372.74	1,558,815	424.90	0.0998
2024-05-13	2024-03-31	13F	WESTERN DIGITAL	COM	958102105	4,351,906	3,828,605	731.63	296,974	983.65	0.0199
2024-02-13	2023-12-31	13F	WESTERN DIGITAL	COM	958102105	523,301	-578,471	-52.50	27,405	-45.49	0.0021
2023-11-13	2023-09-30	13F	WESTERN DIGITAL	COM	958102105	1,101,772	-297,026	-21.23	50,274	-5.25	0.0043
2023-08-11	2023-06-30	13F	WESTERN DIGITAL	COM	958102105	1,398,798	-76,133	-5.16	53,056	-4.51	0.0044
2023-08-11	2023-03-31	13F/A-1	WESTERN DIGITAL	COM	958102105	1,474,931	-578,925	-28.19	55,561	-14.26	0.0051
2023-05-11	2023-03-31	13F	WESTERN DIGITAL	COM	958102105	1,474,931	-578,925		55,561		0.0010
2023-02-13	2022-12-31	13F	WESTERN DIGITAL	COM	958102105	2,053,856	-475,194	-18.79	64,799	-21.28	0.0064
2022-11-10	2022-09-30	13F	WESTERN DIGITAL	COM	958102105	2,529,050	889,134	54.22	82,321	11.98	0.0086
2022-08-12	2022-06-30	13F	WESTERN DIGITAL	COM	958102105	1,639,916	-181,224	-9.95	73,517	-18.69	0.0073
2022-05-13	2022-03-31	13F	WESTERN DIGITAL	COM	958102105	1,821,140	-890,262	-32.83	90,420	-48.86	0.0072
2022-02-14	2021-12-31	13F	WESTERN DIGITAL	COM	958102105	2,711,402	-24,697	-0.90	176,811	14.50	0.0131
2022-02-14	2021-09-30	13F/A-1	WESTERN DIGITAL	COM	958102105	2,736,099	-118,307	-4.14	154,426	-23.98	0.0122
2021-11-15	2021-09-30	13F	WESTERN DIGITAL	COM	958102105	2,736,099	-118,307		154,426		0.0024
2021-08-13	2021-06-30	13F	WESTERN DIGITAL	COM	958102105	2,854,406	-177,876	-5.87	203,147	0.37	0.0159
2021-05-14	2021-03-31	13F	WESTERN DIGITAL	COM	958102105	3,032,282	-165,403	-5.17	202,405	14.28	0.0173
2021-02-08	2020-12-31	13F	WESTERN DIGITAL	COM	958102105	3,197,685	-1,049,716	-24.71	177,120	14.09	0.0158
2020-11-13	2020-09-30	13F	WESTERN DIGITAL	COM	958102105	4,247,401	-9,077,755	-68.12	155,242	-73.61	0.0157
2020-08-24	2020-06-30	13F/A-1	WESTERN DIGITAL	COM	958102105	13,325,156	4,524,971	51.42	588,306	60.62	0.0647
2020-08-13	2020-06-30	13F	WESTERN DIGITAL	COM	958102105	13,325,156	4,524,971		588,306		14,452.9568
2020-05-14	2020-03-31	13F	WESTERN DIGITAL	COM	958102105	8,800,185	-3,138,936	-26.29	366,265	-51.67	0.0507
2020-02-07	2019-12-31	13F	WESTERN DIGITAL	COM	958102105	11,939,121	2,734,118	29.70	757,775	38.03	0.0836
2019-11-13	2019-09-30	13F	WESTERN DIGITAL	COM	958102105	9,205,003	3,306,435	56.05	548,986	95.73	0.0658
2019-08-13	2019-06-30	13F	WESTERN DIGITAL	COM	958102105	5,898,568	1,592,926	37.00	280,477	35.54	0.0328
2019-05-13	2019-03-31	13F	WESTERN DIGITAL	COM	958102105	4,305,642	-270,989	-5.92	206,929	22.30	0.0248
2019-02-13	2018-12-31	13F	WESTERN DIGITAL	COM	958102105	4,576,631	1,540,813	50.75	169,198	-4.79	0.0232
2018-11-09	2018-09-30	13F	WESTERN DIGITAL	COM	958102105	3,035,818	1,942,543	177.68	177,716	109.99	0.0200
2018-08-10	2018-06-30	13F	WESTERN DIGITAL	COM	958102105	1,093,275	8,946	0.83	84,630	-15.41	0.0100
2018-05-14	2018-03-31	13F	WESTERN DIGITAL	COM	958102105	1,084,329	-254,208	-18.99	100,051	-6.01	0.0119
2018-02-12	2017-12-31	13F	WESTERN DIGITAL	COM	958102105	1,338,537	-836,517	-38.46	106,454	-43.35	0.0125
2017-11-13	2017-09-30	13F	WESTERN DIGITAL	COM	958102105	2,175,054	-1,058,528	-32.74	187,923	-34.41	0.0227
2017-08-29	2017-06-30	13F/A-1	WESTERN DIGITAL	COM	958102105	3,233,582	-2,263,094	-41.17	286,496	-36.85	0.0356
2017-08-11	2017-06-30	13F	WESTERN DIGITAL	COM	958102105	3,233,582	-2,263,094		286,496
2017-05-11	2017-03-31	13F	WESTERN DIGITAL	COM	958102105	5,496,676	-264,599	-4.59	453,640	15.88	0.0576
2017-02-10	2016-12-31	13F	WESTERN DIGITAL	COM	958102105	5,761,275	-2,176,107	-27.42	391,478	-15.65	0.0523
2016-11-14	2016-09-30	13F	WESTERN DIGITAL	COM	958102105	7,937,382	-957,623	-10.77	464,099	10.40	0.0618
2016-08-11	2016-06-30	13F	WESTERN DIGITAL	COM	958102105	8,895,005	-2,878,564	-24.45	420,377	-24.42	0.0574
2016-05-16	2016-03-31	13F	WESTERN DIGITAL	COM	958102105	11,773,569	-1,379,330	-10.49	556,183	-29.58	0.0769
2016-02-12	2015-12-31	13F	WESTERN DIGITAL	COM	958102105	13,152,899	6,104,476	86.61	789,832	41.06	0.1063
2015-11-10	2015-09-30	13F	WESTERN DIGITAL	COM	958102105	7,048,423	4,184,471	146.11	559,927	149.31	0.0797
2015-08-25	2015-06-30	13F/A-1	WESTERN DIGITAL	COM	958102105	2,863,952	568,485	24.77	224,590	7.51	0.0288
2015-08-13	2015-06-30	13F	WESTERN DIGITAL	COM	958102105	2,863,952			224,590
2015-05-14	2015-03-31	13F	WESTERN DIGITAL	COM	958102105	2,295,467	1,430,662	165.43	208,910	118.22	0.0266
2015-02-17	2014-12-31	13F	WESTERN DIGITAL	COM	958102105	864,805	289,242	50.25	95,733	70.91	0.0125
2014-11-14	2014-09-30	13F	WESTERN DIGITAL	COM	958102105	575,563	-16,598	-2.80	56,014	2.48	0.0076
2014-08-14	2014-06-30	13F	WESTERN DIGITAL	COM	958102105	592,161	-610,422	-50.76	54,656	-50.50	0.0073
2014-05-15	2014-03-31	13F	WESTERN DIGITAL	COM	958102105	1,202,583	-272,829	-18.49	110,421	-10.80	0.0153
2014-02-13	2013-12-31	13F	WESTERN DIGITAL	COM	958102105	1,475,412	-72,581	-4.69	123,787	26.13	0.0175
2013-11-14	2013-09-30	13F	WESTERN DIGITAL	COM	958102105	1,547,993	-1,929,701	-55.49	98,144	-54.55	0.0150
2013-09-24	2013-06-30	13F/A-1	WESTERN DIGITAL	COM	958102105	3,477,694	3,477,694		215,930		0.0353
2013-08-14	2013-06-30	13F	WESTERN DIGITAL	COM	958102105	3,477,694			215,930		0.0353

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.