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WESTERN DIGITAL CORP (WDC)

Name: WESTERN DIGITAL CORP (WDC) — Institutional ownership, SEC filings and insider activity
Creator: Sightfile
License: https://www.sec.gov/privacy#dissemination

Institutional ownership, SEC filings and insider activity

Sector: Technology · SEC CIK 0000106040 · EDGAR filings · Updated 2026-07-21

WESTERN DIGITAL CORP (WDC) has reported institutional ownership of 95.0%, with 1,401 institutional managers holding positions valued at $88.0B per the latest 13F reporting period.

Institutional ownership

95.0%

Institutional managers

1,401

Reported 13F value

$88.0B

Insider activity

274 trans.

−$43.9M net selling

Latest updates

2026-07-21 — Insider transaction reported (Form 4)
2026-07-21 — Notice of proposed sale filed (Form 144)
2026-06-22 — Insider transaction reported (Form 4)
2026-06-22 — Insider transaction reported (Form 4)
2026-06-22 — Insider transaction reported (Form 4)
2026-06-22 — Insider transaction reported (Form 4)
2026-06-22 — Insider transaction reported (Form 4)
2026-06-22 — Insider transaction reported (Form 4)

Institutional ownership overview

According to SEC 13F filings tracked by Sightfile, WESTERN DIGITAL CORP has 1,401 institutional holders and institutional ownership of 95.0%.

#	Institution	Reported value	% of tracked total
1	BlackRock, Inc.	$9.68B	11.0%
2	FMR LLC	$8.55B	9.7%
3	VANGUARD CAPITAL MANAGEMENT LLC	$5.96B	6.8%
4	VANGUARD PORTFOLIO MANAGEMENT LLC	$4.65B	5.3%
5	JPMORGAN CHASE & CO	$4.41B	5.0%
6	STATE STREET CORP	$4.18B	4.8%
7	Capital World Investors	$3.21B	3.7%
8	GEODE CAPITAL MANAGEMENT, LLC	$2.56B	2.9%
9	BANK OF AMERICA CORP /DE/	$2.30B	2.6%
10	MORGAN STANLEY	$2.15B	2.4%

Full holder history and quarter-over-quarter changes are available inside the app.

Insider activity

Insiders reported 274 transactions (0 buys, 108 sells) across 15 reporting insiders, with a net reported value of −$43.9M.

Quarterly net insider value, as reported in Form 4 filings.

Fails-to-deliver

The SEC's fails-to-deliver file for 2026-06-30 reports 95,125 failed-to-deliver shares ($2.24M) for WDC — an official data point published by the SEC, shown as reported.

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See full history, cross-references and alerts on Sightfile

Sightfile provides information only — not investment advice, recommendations, or an assessment of any security. Data is derived from official public sources (SEC EDGAR and U.S. government agencies), may contain errors or delays, and should be verified against the source filing before relying on it.
Data sources: SEC EDGAR (filings, 13F, FTD), aggregated by Sightfile. Page updated 2026-07-21.