Security key
958102105
- Security type / class
- Equity / COMMON STOCK
- Total 13F shares
- 329,191,581
- Total 13F value
- $88,470,028,147
- Share change
- -7,630,716
- Put/Call ratio
- 235%
- SEC-reported price per share
- $270.49
- Number of holders
- 1,401
- Value change
- -$1,332,618,469
- Number of buys
- 769
- Number of sells
- 578
- Shares outstanding
- 366,129,380
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2026
Institutions
1,401
Top holders
10
WDC full security history
Ownership snapshot
Full 13F holder table
WESTERN DIGITAL CORP SEC filings
WESTERN DIGITAL CORP company facts
WESTERN DIGITAL CORP 13D/G history
Broader feeds
Ownership snapshot
Top reported holders of WDC - WESTERN DIGITAL CORP - COMMON STOCK (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
VANGUARD CAPITAL MANAGEME...
Disclosed value leader
VANGUARD GROUP INC
Comparable rows
15/15
Latest evidence
31 Mar 2026
13D/G
13F
Lead comparable stake: 7.5%
13D/G row: VANGUARD CAPITAL MANAGEMENT LLC
Showing 1-6 of 15 holder rows.
Quick read
VANGUARD CAPITAL MANAGEMENT LLC leads the comparable SEC ownership view at 7.5%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens VANGUARD CAPITAL MANAGEMENT LLC's linked filing trail.
Comparable ownership
Top 5
VANGUARD CAPITAL MANAGEMENT LLC
7.5%
JPMORGAN CHASE & CO
5.3%
MANAGED ACCOUNT ADVISORS LLC
2.6%
VANGUARD GROUP INC
12%
BlackRock, Inc.
9.7%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
Vanguard Capital Management
|
7.5%
|
$6,871,235,019
25,402,917 shares
|
$0 | 31 Mar 2026 |
| JPMORGAN CHASE & CO |
13F
13D/G
Company
|
5.3%
from 13D/G
|
$2,462,766,329
14,295,965 shares
|
— | 31 Dec 2025 |
| MANAGED ACCOUNT ADVISORS LLC |
13D/G
|
2.6%
|
$1,914,895,075
9,026,563 shares
|
-$1,977,932,052 | 31 Dec 2025 |
| VANGUARD GROUP INC |
13F
Company
|
12%
|
$7,295,403,659
42,348,660 shares
|
— | 31 Dec 2025 |
| BlackRock, Inc. |
13F
Company
|
9.7%
|
$6,117,224,662
35,509,518 shares
|
— | 31 Dec 2025 |
| FMR LLC |
13F
Company
|
9.2%
|
$5,821,658,122
33,793,801 shares
|
— | 31 Dec 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q1 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
1,401
Shares
329,191,581
Rows available
1,401
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q1 2026 vs Q1 2026 Across Filers
Q1 2026 holders
1,401
Q1 2026 holders
1,401
Holder diff
0
| Investor | Q1 2026 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q1 2026 value | Value change | Value Chg % |
|---|