Signaturefd, Llc reports 50.57% increase in ownership of WDC / Western Digital Corporation

Western Digital Corporation

MX ˙ BMV ˙ US9581021055

Security	MX:WDC / Western Digital Corporation
Institution	Signaturefd, Llc
Latest Disclosed Ownership	8,250 shares
Latest Disclosed Value	$ 2,231,505

On April 7, 2026 - Signaturefd, Llc filed a 13F-HR form disclosing ownership of 8,250 shares of Western Digital Corporation (MX:WDC) valued at $2,231,505 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 20, 2026 disclosing 5,479 shares of Western Digital Corporation. This represents a change in shares of 50.57% 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	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-04-07	2026-03-31	13F	WESTERN DIGITAL	COM	958102105	8,250	2,771	50.57	2,232	136.59	0.0342
2026-01-20	2025-12-31	13F	WESTERN DIGITAL	COM	958102105	5,479	-1,319	-19.40	944	15.56	0.0144
2025-10-21	2025-09-30	13F	WESTERN DIGITAL	COM	958102105	6,798	2,043	42.97	816	168.42	0.0129
2025-07-16	2025-06-30	13F	WESTERN DIGITAL	COM	958102105	4,755	1,319	38.39	304	120.29	0.0052
2025-05-02	2025-03-31	13F	WESTERN DIGITAL	COM	958102105	3,436	-561	-14.04	139	-42.02	0.0026
2025-02-10	2024-12-31	13F	WESTERN DIGITAL	COM	958102105	3,997	72	1.83	238	-11.19	0.0045
2024-10-21	2024-09-30	13F	WESTERN DIGITAL	COM	958102105	3,925	-1,366	-25.82	268	-33.00	0.0051
2024-07-29	2024-06-30	13F	WESTERN DIGITAL	COM	958102105	5,291	1,723	48.29	401	64.61	0.0081
2024-05-03	2024-03-31	13F	WESTERN DIGITAL	COM	958102105	3,568	991	38.46	243	81.34	0.0051
2024-02-01	2023-12-31	13F	WESTERN DIGITAL	COM	958102105	2,577	254	10.93	135	27.62	0.0031
2023-11-03	2023-09-30	13F	WESTERN DIGITAL	COM	958102105	2,323	694	42.60	106	72.13	0.0028
2023-08-01	2023-06-30	13F	WESTERN DIGITAL	COM	958102105	1,629	69	4.42	62	5.17	0.0016
2023-04-28	2023-03-31	13F	WESTERN DIGITAL	COM	958102105	1,560	342	28.08	59	52.63	0.0016
2023-01-30	2022-12-31	13F	WESTERN DIGITAL	COM	958102105	1,218	811	199.26	38	192.31	0.0011
2022-11-08	2022-09-30	13F	WESTERN DIGITAL	COM	958102105	407	-1,783	-81.42	13	-86.73	0.0004
2022-08-10	2022-06-30	13F	WESTERN DIGITAL	COM	958102105	2,190	497	29.36	98	16.67	0.0033
2022-05-02	2022-03-31	13F	WESTERN DIGITAL	COM	958102105	1,693	345	25.59	84	-4.55	0.0025
2022-01-25	2021-12-31	13F	WESTERN DIGITAL	COM	958102105	1,348	699	107.70	88	137.84	0.0027
2021-10-28	2021-09-30	13F	WESTERN DIGITAL	COM	958102105	649	2	0.31	37	-19.57	0.0013
2021-07-26	2021-06-30	13F	WESTERN DIGITAL	COM	958102105	647	64	10.98	46	17.95	0.0018
2021-04-30	2021-03-31	13F	WESTERN DIGITAL	COM	958102105	583	-46	-7.31	39	11.43	0.0017
2021-02-11	2020-12-31	13F	WESTERN DIGITAL	COM	958102105	629	154	32.42	35	105.88	0.0016
2020-11-03	2020-09-30	13F	WESTERN DIGITAL	COM	958102105	475	-782	-62.21	17	-69.09	0.0009
2020-07-30	2020-06-30	13F	WESTERN DIGITAL	COM	958102105	1,257	-436	-25.75	55	-21.43	0.0033
2020-04-23	2020-03-31	13F	WESTERN DIGITAL	COM	958102105	1,693	193	12.87	70	-26.32	0.0060
2020-02-05	2019-12-31	13F	WESTERN DIGITAL	COM	958102105	1,500	519	52.91	95	61.02	0.0070
2019-10-16	2019-09-30	13F	WESTERN DIGITAL	COM	958102105	981	23	2.40	59	28.26	0.0048
2019-07-31	2019-06-30	13F	WESTERN DIGITAL	COM	958102105	958	-97	-9.19	46	-9.80	0.0040
2019-05-09	2019-03-31	13F	WESTERN DIGITAL	COM	958102105	1,055	-720	-40.56	51	-22.73	0.0043
2019-02-13	2018-12-31	13F	WESTERN DIGITAL	COM	958102105	1,775	-121	-6.38	66	-40.54	0.0062
2018-11-14	2018-09-30	13F	WESTERN DIGITAL	COM	958102105	1,896	528	38.60	111	4.72	0.0113
2018-08-14	2018-06-30	13F	WESTERN DIGITAL	COM	958102105	1,368	-561	-29.08	106	-40.45	0.0118
2018-05-08	2018-03-31	13F	WESTERN DIGITAL	COM	958102105	1,929	1,929		178		0.0209
2017-02-14	2016-12-31	13F	WESTERN DIGITAL	COM	958102105	0	-699	-100.00	0	-100.00
2016-11-14	2016-09-30	13F	WESTERN DIGITAL	COM	958102105	699	265	61.06	41	95.24	0.0060
2016-07-29	2016-06-30	13F	WESTERN DIGITAL	COM	958102105	434	394	985.00	21	950.00	0.0031
2016-05-12	2016-03-31	13F	WESTERN DIGITAL	COM	958102105	40	-6	-13.04	2	-33.33	0.0003
2016-01-22	2015-12-31	13F	WESTERN DIGITAL	COM	958102105	46	-23	-33.33	3	-40.00	0.0006
2015-10-23	2015-09-30	13F	WESTERN DIGITAL	COM	958102105	69	-89	-56.33	5	-58.33	0.0011
2015-07-15	2015-06-30	13F	WESTERN DIGITAL	COM	958102105	158	144	1,028.57	12	1,100.00	0.0026
2015-04-15	2015-03-31	13F	WESTERN DIGITAL	COM	958102105	14	0	0.00	1	-50.00	0.0002
2015-02-13	2014-12-31	13F	WESTERN DIGITAL	COM	958102105	14	0	0.00	2	100.00	0.0005
2014-11-13	2014-09-30	13F	WESTERN DIGITAL	COM	958102105	14	0	0.00	1	0.00	0.0003
2014-08-14	2014-06-30	13F	WESTERN DIGITAL	COM	958102105	14	0	0.00	1	0.00	0.0003
2014-05-16	2014-03-31	13F	WESTERN DIGITAL	COM	958102105	14	0	0.00	1	0.00	0.0004
2014-02-11	2013-12-31	13F	WESTERN DIGITAL	COM	958102105	14	0	0.00	1	0.00	0.0004
2013-11-13	2013-09-30	13F	WESTERN DIGITAL	COM	958102105	14	0	0.00	1	0.00	0.0004
2013-08-14	2013-06-30	13F	WESTERN DIGITAL	COM	958102105	14	14		1		0.0005

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.