Filer Snapshot

WESTERN DIGITAL CORP

CIK 0000106040. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.

Entity type

Company

Total filings

375

Latest filing

02 Jun 2026

Industry

Computer Storage Devices

Filing-backed research brief

Start with the SEC data that changes for this CIK

Latest signal: 13D/G stake for SNDK. Each card links back to the PortfolioSavvy page where the filing evidence is closest.

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Largest parsed holding

—

Populates from the latest parsed 13F information table.

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13D/G large stake

SNDK

31 Mar 2026 · 0.7% ownership

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Source: SEC Forms 3/4/5

4 filed on 02 Jun 2026 for CIK 0000106040.

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Listed symbols
WDC on Nasdaq
Ownership signals CIK-linked ownership evidence from parsed SEC filings. 1 signal
Parsed SEC ownership signals

Parsed SEC ownership coverage

These bars compare filing-backed value available in each disclosure family. Read them as separate lenses, not as one combined ownership total.

Forms 3/4/5 positions$315.55M

Reporting-owner positions with enough filing detail to estimate value.

Forms 3/4/5 position value

3/4/5
$315.55M

Estimated from parsed Forms 3/4/5 when filings include enough share and price data.

Largest linked holdings

Largest issuer positions linked to this CIK across parsed 13F, 13D/G, and Forms 3/4/5 records.

SNDK

Largest active 13G stakes

Passive or institutional large-stake positions disclosed in parsed Schedule 13G filings.

SNDK
How to read these SEC ownership signals
  • Read each filing family separately: 13F portfolios, 13D/G large stakes, and Forms 3/4/5 owner positions answer different SEC disclosure questions.
  • Open the linked research path when you need the filing, CIK, issuer, or CUSIP trail behind a value.
At a glance Names, identifiers, and filing context for this profile. 2 identity fields
SEC industry group
Computer Storage Devices (Office of Technology)
Business address
5601 Great Oaks Parkway, San Jose, CA, 95119
EDGAR profile Static EDGAR fields kept behind disclosure so the main profile stays readable. 2 profile fields available
Incorporated in
DE
Fiscal year end
03 July

Filer intelligence

What SEC filings say about WESTERN DIGITAL CORP

A compact read of parsed XML filings. 13F, 13D/G, and Forms 3/4/5 are shown separately because they answer different ownership questions.

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Quick read

  • 1 recent 13D/G stake row found; top row is SNDK at 0.7% ownership.
  • Forms 3/4/5 show insider context for SNDK worth $315.55M.

SEC source mix

Counts show available parsed rows, not one combined ownership total.

XML parsed
13F portfolio No rows yet

Quarterly institutional portfolio holdings.

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13D/G stakes 1 rows

Beneficial ownership and large-stake disclosures.

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Forms 3/4/5 1 rows

Officer, director, and 10% owner holdings or transactions.

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13D/G large-stake context

SNDK

31 Mar 2026 · Common Stock, $0.01 Par Value Per Share

0.7%
Issuer page 13D/G history

Forms 3/4/5 insider context

SNDK

09 Jun 2025 · 10% owner

$315.55M
Issuer page Owner page

Latest update

What changed recently for WESTERN DIGITAL CORP

New filing available

Latest Schedule 13D/G period: 31 Mar 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

15 May 2026

Page type

Filer profile

Latest period

31 Mar 2026

Schedule 13D/G context is visible from filings filed on 15 May 2026.

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Benchmark Context

Benchmark context for this company

WESTERN DIGITAL CORP has a source-backed company facts view where you can compare the latest reported metrics with its own recent history and with peer rankings for the same metric.

Compared with

Start on the facts page for period-to-period context, then open a metric ranking when you want to compare the same reported fact across other SEC-reporting companies.

Why this is notable

Latest Schedule 13D/G period: 31 Mar 2026. That gives you a fresh baseline before you compare this company with peers.

  • Latest company facts filing date: 01 May 2026.
  • Peer comparisons stay conservative: same metric, compatible units, latest valid company row only.
  • Open the facts page first if you want the cleanest path to verification.

Benchmark context is only shown where the app has enough comparable SEC-backed data to keep the interpretation honest.

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SEC filing record

CIK 0000106040 filing coverage

Start with this filing record, then use the linked ownership pages when parsed 13F, 13D/G, Forms 3/4/5, or facts data exists for this CIK.

SEC filings
375
First seen
16 Jun 2021
Latest filing
02 Jun 2026
Entity
Company

Observed form types

10-K 10-Q 3 4 4/A SCHEDULE 13G SCHEDULE 13G/A

CIK-linked evidence first

WESTERN DIGITAL CORP SEC filings WESTERN DIGITAL CORP 13D/G history WESTERN DIGITAL CORP owner filings WESTERN DIGITAL CORP insider transactions WESTERN DIGITAL CORP company facts Open SEC filing index

Industry context: Computer Storage Devices.

Latest Filings

Showing the latest 12 of 375 SEC filings for WESTERN DIGITAL CORP.

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4

4 filing

Filing date
02 Jun 2026
Reporting date
01 Jun 2026
SEC evidence
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4

4 filing

Filing date
29 May 2026
Reporting date
28 May 2026
SEC evidence
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4

4 filing

Filing date
28 May 2026
Reporting date
26 May 2026
SEC evidence
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3

3 filing

Filing date
28 May 2026
Reporting date
26 May 2026
SEC evidence
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4

4 filing

Filing date
27 May 2026
Reporting date
22 May 2026
SEC evidence
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4

4 filing

Filing date
27 May 2026
Reporting date
25 May 2026
SEC evidence
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4

4 filing

Filing date
27 May 2026
Reporting date
25 May 2026
SEC evidence
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4

4 filing

Filing date
27 May 2026
Reporting date
25 May 2026
SEC evidence
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4

4 filing

Filing date
22 May 2026
Reporting date
20 May 2026
SEC evidence
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4

4 filing

Filing date
22 May 2026
Reporting date
20 May 2026
SEC evidence
Open document Open filing
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4

4 filing

Filing date
22 May 2026
Reporting date
20 May 2026
SEC evidence
Open document Open filing
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4

4 filing

Filing date
22 May 2026
Reporting date
20 May 2026
SEC evidence
Open document Open filing
Next action
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