Comparable stake leader
VANGUARD CAPITAL MANAGEMENT LLC
SEC ownership of WESTERN DIGITAL CORP
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000106040.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
30 Jun 2026
- Public ticker
- WDC on Nasdaq
- Parsed ownership sources
-
13F and 13D/G
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
VANGUARD CAPITAL MANAGEMENT LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
VANGUARD CAPITAL MANAGEMENT LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
30 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0000106040
- Issuer location
- San Jose, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of WESTERN DIGITAL CORP (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
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
30 Jun 2026
13F
13D/G
Lead comparable stake: 7.5%
13D/G row: VANGUARD CAPITAL MANAGEMENT LLC
Showing 1-8 of 50 holder rows.
Quick read
VANGUARD CAPITAL MANAGEMENT LLC leads the comparable SEC ownership view at 7.5%.
50 of 50 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%
FMR LLC
7.2%
JPMORGAN CHASE & CO
5.3%
VANGUARD PORTFOLIO MANAGEMENT LLC
3.6%
MANAGED ACCOUNT ADVISORS LLC
2.6%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
13D/G
Company · Vanguard Capital Management
|
7.5%
from 13D/G
|
$14,378,105,202
22,510,811 shares
|
— | 30 Jun 2026 |
| FMR LLC |
13F
13D/G
Company
|
7.2%
from 13D/G
|
$16,596,273,651
25,983,645 shares
|
— | 30 Jun 2026 |
| JPMORGAN CHASE & CO |
13F
13D/G
Company
|
5.3%
from 13D/G
|
$11,087,038,554
17,007,789 shares
|
— | 30 Jun 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13F
13D/G
Company · Vanguard Portfolio Management
|
3.6%
from 13D/G
|
$8,373,283,234
13,109,474 shares
|
— | 30 Jun 2026 |
| MANAGED ACCOUNT ADVISORS LLC |
13D/G
|
2.6%
|
$1,914,895,075
9,026,563 shares
|
-$1,977,932,052 | 31 Dec 2025 |
| BlackRock, Inc. |
13F
Company
|
9%
|
$21,048,132,217
32,953,613 shares
|
— | 30 Jun 2026 |
| Capital World Investors |
13F
Company
|
4.5%
|
$10,601,693,655
16,598,211 shares
|
— | 30 Jun 2026 |
| STATE STREET CORP |
13F
Company
|
4.4%
|
$10,396,199,533
16,276,615 shares
|
— | 30 Jun 2026 |
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.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$74,949,413.
Buys
$0
Insiders: 0
Sells
$74,949,413
Insiders: 10
Net
-$74,949,413
Shares: -254,343
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 254,343
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 35,037 | $0 | $15,777,917 | -$15,777,917 |
| 3-6 | 0 | 43,322 | $0 | $19,838,011 | -$19,838,011 |
| 6-9 | 0 | 108,795 | $0 | $28,687,426 | -$28,687,426 |
| 9-12 | 0 | 67,189 | $0 | $10,646,060 | -$10,646,060 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 29 reporting-owner rows connected to WESTERN DIGITAL CORP. Open a relationship link for the CIK-to-CIK filing trail.
Rows
29
Largest Forms 3/4/5 holder
Irving Tan
Net 12M change
-$74,949,413
Latest report
03 Sep 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Irving Tan | Chief Executive Officer, Director | $375,661,251 | -$25,258,809 | -6.3% | Median | 31 Aug 2026 |
| Kris Sennesael | Chief Financial Officer | $110,951,412 | Median | 25 Aug 2026 | ||
| Ahmed Mohammed Shihab | Chief Product Officer | $104,559,741 | Median | 25 Aug 2026 | ||
| Brian Scott Davis | Chief Sales & Mrktng Officer | $64,156,869 | -$7,798,498 | -11% | Median | 03 Sep 2026 |
| David Goeckeler | Chief Executive Officer, Director | $58,079,665 | Mixed | 27 Nov 2024 | ||
| Cynthia L. Tregillis | Chief Legal Officer & Corp Sec | $50,096,736 | -$7,495,981 | -13% | Filing P/S | 03 Sep 2026 |
| Vidyadhara K. Gubbi | Chief of Global Operations | $37,052,443 | -$12,914,804 | -26% | Filing P/S | 03 Sep 2026 |
| Wissam G. Jabre | Evp & Cfo | $24,379,857 | Mixed | 28 Feb 2025 | ||
| Stephanie A. Streeter | Director | $16,849,556 | -$2,519,280 | -13% | Mixed | 31 Aug 2026 |
| Srinivasan Sivaram | President, Tech & Strategy | $14,649,947 | Mixed | 03 Sep 2023 | ||
| Martin I. Cole | Director | $9,968,983 | -$8,078,792 | -45% | Filing P/S | 28 Jul 2026 |
| Robert Soderbery | EVP & GM, Flash Business | $9,505,210 | Mixed | 27 Nov 2024 | ||
| Michael Charles Ray | EVP, Chief Legal Officer & Sec | $8,403,758 | Mixed | 27 Nov 2023 | ||
| Brad David Feller | SVP & Chief Accounting Officer | $7,692,104 | Median | 25 Aug 2026 | ||
| Sean Hunkler | EVP, Global Operations | $7,352,910 | Mixed | 03 Sep 2021 | ||
| Robert K. Eulau | Evp & Cfo | $6,151,274 | Mixed | 03 Sep 2021 | ||
| Tunc Doluca | Director | $5,447,018 | Mixed | 17 Jun 2026 | ||
| Matthew E. Massengill | Director | $5,064,221 | -$9,616,466 | -66% | Mixed | 17 Jun 2026 |
| Don R. Bennett | Interim CFO | $4,333,763 | Mixed | 06 Mar 2025 | ||
| Kimberly Alexy | Director | $4,296,199 | -$592,437 | -12% | Mixed | 17 Jun 2026 |
Recent insider transactions for WESTERN DIGITAL CORP
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Cynthia L. Tregillis | WDC | Common Stock | Sale | -0.39% | $194,918 | $451.20 | -432 | 111,030 | 04 Sep 2026 | Direct |
| Vidyadhara K. Gubbi | WDC | Common Stock | Sale | -2.18% | $825,472 | $459.87 | -1,795 | 80,571 | 04 Sep 2026 | Direct |
| Cynthia L. Tregillis | WDC | Common Stock | Tax liability | -0.62% | -700 | 111,462 | 03 Sep 2026 | Direct | ||
| Cynthia L. Tregillis | WDC | Common Stock | Options Exercise | 0.01% | 7 | 112,162 | 03 Sep 2026 | Direct | ||
| Cynthia L. Tregillis | WDC | Dividend Equivalent Rights | Options Exercise | -2.54% | -7.06 | 270 | 03 Sep 2026 | Direct | ||
| Vidyadhara K. Gubbi | WDC | Common Stock | Tax liability | -2.1% | -1,764 | 82,366 | 03 Sep 2026 | Direct | ||
| Vidyadhara K. Gubbi | WDC | Common Stock | Options Exercise | 0.02% | 14 | 84,130 | 03 Sep 2026 | Direct | ||
| Vidyadhara K. Gubbi | WDC | Dividend Equivalent Rights | Options Exercise | -6.78% | -14.12 | 194 | 03 Sep 2026 | Direct | ||
| Brian Scott Davis | WDC | Common Stock | Tax liability | -0.87% | -882 | 100,446 | 03 Sep 2026 | Direct | ||
| Brian Scott Davis | WDC | Common Stock | Options Exercise | 0.01% | 7 | 101,328 | 03 Sep 2026 | Direct | ||
| Brian Scott Davis | WDC | Dividend Equivalent Rights | Options Exercise | -4.3% | -7.06 | 157 | 03 Sep 2026 | Direct | ||
| Irving Tan | WDC | Common Stock | Gift | 112,500 | 112,500 | 01 Sep 2026 | By Trust via Inv Co | |||
| Irving Tan | WDC | Common Stock | Gift | -100% | -112,500 | 0 | 01 Sep 2026 | By Investment Co | ||
| Stephanie A. Streeter | WDC | Common Stock | Sale | -4.39% | $728,000 | $455.00 | -1,600 | 34,807 | 01 Sep 2026 | By Family Trust |
| Irving Tan | WDC | Common Stock | Other | 112,500 | 112,500 | 31 Aug 2026 | By Investment Co | |||
| Irving Tan | WDC | Common Stock | Other | -29.7% | -112,500 | 266,647 | 31 Aug 2026 | Direct | ||
| Stephanie A. Streeter | WDC | Common Stock | Sale | -9.9% | $1,791,280 | $447.82 | -4,000 | 36,407 | 31 Aug 2026 | By Family Trust |
| Cynthia L. Tregillis | WDC | Common Stock | Sale | -0.89% | $481,709 | $478.36 | -1,007 | 112,155 | 27 Aug 2026 | Direct |
| Cynthia L. Tregillis | WDC | Common Stock | Tax liability | -1.42% | -1,631 | 113,162 | 26 Aug 2026 | Direct | ||
| Cynthia L. Tregillis | WDC | Common Stock | Options Exercise | 0.01% | 9 | 114,793 | 26 Aug 2026 | Direct | ||
| Cynthia L. Tregillis | WDC | Common Stock | Sale | -0.41% | $214,571 | $450.78 | -476 | 114,784 | 26 Aug 2026 | Direct |
| Cynthia L. Tregillis | WDC | Dividend Equivalent Rights | Options Exercise | -3.3% | -9.47 | 278 | 26 Aug 2026 | Direct | ||
| Irving Tan | WDC | Common Stock | Tax liability | -0.87% | -3,314 | 379,147 | 26 Aug 2026 | Direct | ||
| Irving Tan | WDC | Common Stock | Options Exercise | 0.01% | 42 | 382,461 | 26 Aug 2026 | Direct | ||
| Irving Tan | WDC | Dividend Equivalent Rights | Options Exercise | -5.2% | -42.42 | 774 | 26 Aug 2026 | Direct | ||
| Ahmed Mohammed Shihab | WDC | Common Stock | Tax liability | -1.65% | -2,741 | 163,702 | 26 Aug 2026 | Direct | ||
| Ahmed Mohammed Shihab | WDC | Common Stock | Options Exercise | 0.01% | 15 | 166,443 | 26 Aug 2026 | Direct | ||
| Ahmed Mohammed Shihab | WDC | Dividend Equivalent Rights | Options Exercise | -3.73% | -15.91 | 411 | 26 Aug 2026 | Direct | ||
| Kris Sennesael | WDC | Common Stock | Tax liability | -2.42% | -4,317 | 173,709 | 26 Aug 2026 | Direct | ||
| Kris Sennesael | WDC | Common Stock | Options Exercise | 0.01% | 19 | 178,026 | 26 Aug 2026 | Direct | ||
| Kris Sennesael | WDC | Dividend Equivalent Rights | Options Exercise | -4.28% | -19.88 | 444 | 26 Aug 2026 | Direct | ||
| Vidyadhara K. Gubbi | WDC | Common Stock | Tax liability | -2.39% | -2,056 | 84,116 | 26 Aug 2026 | Direct | ||
| Vidyadhara K. Gubbi | WDC | Common Stock | Options Exercise | 0.01% | 9 | 86,172 | 26 Aug 2026 | Direct | ||
| Vidyadhara K. Gubbi | WDC | Dividend Equivalent Rights | Options Exercise | -4.35% | -9.47 | 208 | 26 Aug 2026 | Direct | ||
| Brian Scott Davis | WDC | Common Stock | Tax liability | -1.6% | -1,644 | 101,321 | 26 Aug 2026 | Direct | ||
| Brian Scott Davis | WDC | Common Stock | Options Exercise | 0.01% | 7 | 102,965 | 26 Aug 2026 | Direct | ||
| Brian Scott Davis | WDC | Dividend Equivalent Rights | Options Exercise | -4.4% | -7.57 | 164 | 26 Aug 2026 | Direct | ||
| Cynthia L. Tregillis | WDC | Common Stock | Award | 3.48% | 3,878 | 115,260 | 25 Aug 2026 | Direct | ||
| Cynthia L. Tregillis | WDC | Common Stock | Tax liability | -0.69% | -771 | 111,382 | 25 Aug 2026 | Direct | ||
| Cynthia L. Tregillis | WDC | Common Stock | Options Exercise | 0.01% | 7 | 112,153 | 25 Aug 2026 | Direct | ||
| Cynthia L. Tregillis | WDC | Dividend Equivalent Rights | Options Exercise | -2.64% | -7.78 | 287 | 25 Aug 2026 | Direct | ||
| Irving Tan | WDC | Common Stock | Award | 4.52% | 16,548 | 382,419 | 25 Aug 2026 | Direct | ||
| Irving Tan | WDC | Common Stock | Tax liability | -0.13% | -476 | 365,871 | 25 Aug 2026 | Direct | ||
| Irving Tan | WDC | Common Stock | Options Exercise | 0.01% | 32 | 366,347 | 25 Aug 2026 | Direct | ||
| Irving Tan | WDC | Dividend Equivalent Rights | Options Exercise | -3.78% | -32.03 | 816 | 25 Aug 2026 | Direct | ||
| Ahmed Mohammed Shihab | WDC | Common Stock | Award | 4.21% | 6,722 | 166,428 | 25 Aug 2026 | Direct | ||
| Kris Sennesael | WDC | Common Stock | Award | 4.87% | 8,274 | 178,007 | 25 Aug 2026 | Direct | ||
| Vidyadhara K. Gubbi | WDC | Common Stock | Award | 6.38% | 5,171 | 86,163 | 25 Aug 2026 | Direct | ||
| Vidyadhara K. Gubbi | WDC | Common Stock | Tax liability | -1.39% | -1,143 | 80,992 | 25 Aug 2026 | Direct | ||
| Vidyadhara K. Gubbi | WDC | Common Stock | Options Exercise | 0.01% | 9 | 82,135 | 25 Aug 2026 | Direct |
* marks a reported price that did not pass the local price check.