Comparable stake leader
FMR 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
31 Mar 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
-
FMR LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
FMR LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
31 Mar 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
FMR LLC
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
31 Mar 2026
13F
13D/G
Lead comparable stake: 10%
13D/G row: FMR LLC
Showing 1-8 of 50 holder rows.
Quick read
FMR LLC leads the comparable SEC ownership view at 10%.
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 FMR LLC's linked filing trail.
Comparable ownership
Top 5
FMR LLC
10%
VANGUARD CAPITAL MANAGEMENT LLC
7.5%
JPMORGAN CHASE & CO
5.3%
VANGUARD PORTFOLIO MANAGEMENT LLC
5.1%
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 |
|---|---|---|---|---|---|
| FMR LLC |
13F
13D/G
Company
|
10%
from 13D/G
|
$8,553,818,190
31,623,418 shares
|
— | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
13F
Vanguard Capital Management · Company
|
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
|
$4,407,282,917
17,512,148 shares
|
— | 31 Mar 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
13F
Vanguard Portfolio Management · Company
|
5.1%
|
$4,657,060,511
17,217,120 shares
|
$0 | 31 Mar 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
|
11%
|
$9,675,216,961
35,769,222 shares
|
— | 31 Mar 2026 |
| STATE STREET CORP |
13F
Company
|
4.6%
|
$4,183,335,045
15,465,766 shares
|
— | 31 Mar 2026 |
| Capital World Investors |
13F
Company
|
3.5%
|
$3,213,393,640
11,880,038 shares
|
— | 31 Mar 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: -$63,093,073.
Buys
$0
Insiders: 0
Sells
$63,093,073
Insiders: 10
Net
-$63,093,073
Shares: -269,036
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 269,036
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 43,322 | $0 | $19,838,011 | -$19,838,011 |
| 3-6 | 0 | 108,795 | $0 | $28,687,426 | -$28,687,426 |
| 6-9 | 0 | 67,189 | $0 | $10,646,060 | -$10,646,060 |
| 9-12 | 0 | 49,730 | $0 | $3,921,576 | -$3,921,576 |
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
-$63,093,075
Latest report
17 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Irving Tan | Chief Executive Officer, Director | $161,202,843 | -$17,013,814 | -9.5% | Median | 17 Jun 2026 |
| Cynthia L. Tregillis | Chief Legal Officer & Corp Sec | $63,640,420 | -$6,811,434 | -9.7% | Filing P/S | 17 Jun 2026 |
| David Goeckeler | Chief Executive Officer, Director | $58,079,665 | Mixed | 27 Nov 2024 | ||
| Kris Sennesael | Chief Financial Officer | $45,911,079 | Median | 17 Jun 2026 | ||
| Ahmed Mohammed Shihab | Chief Product Officer | $43,198,875 | Median | 17 Jun 2026 | ||
| Brian Scott Davis | Chief Sales & Mrktng Officer | $27,482,595 | -$7,798,498 | -22% | Median | 17 Jun 2026 |
| Wissam G. Jabre | Evp & Cfo | $24,379,857 | Mixed | 28 Feb 2025 | ||
| Vidyadhara K. Gubbi | Chief of Global Operations | $22,559,677 | -$13,835,853 | -38% | Median | 17 Jun 2026 |
| Srinivasan Sivaram | President, Tech & Strategy | $14,649,947 | Mixed | 03 Sep 2023 | ||
| Martin I. Cole | Director | $13,859,713 | -$6,281,435 | -31% | Filing P/S | 17 Jun 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 | ||
| Sean Hunkler | EVP, Global Operations | $7,352,910 | Mixed | 03 Sep 2021 | ||
| Robert K. Eulau | Evp & Cfo | $6,151,274 | Mixed | 03 Sep 2021 | ||
| Stephanie A. Streeter | Director | $5,800,354 | Mixed | 17 Jun 2026 | ||
| 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 |
| Lori S. Sundberg | EVP & Chief Human Res Officer | $2,964,552 | Mixed | 06 Aug 2021 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Irving Tan | WDC | Common Stock | Tax liability | -0.18% | -1,090 | 595,966 | 20 Jun 2026 | Direct | ||
| Irving Tan | WDC | Common Stock | Options Exercise | 0.01% | 52 | 597,056 | 20 Jun 2026 | Direct | ||
| Irving Tan | WDC | Dividend Equivalent Rights | Options Exercise | -5.55% | -52.11 | 887 | 20 Jun 2026 | Direct | ||
| Brian Scott Davis | WDC | Common Stock | Tax liability | -0.94% | -961 | 101,603 | 20 Jun 2026 | Direct | ||
| Brian Scott Davis | WDC | Common Stock | Options Exercise | 0.01% | 7 | 102,564 | 20 Jun 2026 | Direct | ||
| Brian Scott Davis | WDC | Dividend Equivalent Rights | Options Exercise | -3.89% | -7.7 | 190 | 20 Jun 2026 | Direct | ||
| Cynthia L. Tregillis | WDC | Dividend Equivalent Rights | Award | 6.12% | 18.64 | 323 | 17 Jun 2026 | Direct | ||
| Irving Tan | WDC | Dividend Equivalent Rights | Award | 6.4% | 56.5 | 939 | 17 Jun 2026 | Direct | ||
| Stephanie A. Streeter | WDC | Dividend Equivalent Rights | Award | 18.4% | 0.33 | 2 | 17 Jun 2026 | Direct | ||
| Ahmed Mohammed Shihab | WDC | Common Stock | Tax liability | -3.12% | -5,149 | 159,706 | 17 Jun 2026 | Direct | ||
| Ahmed Mohammed Shihab | WDC | Common Stock | Options Exercise | 0.03% | 51 | 164,855 | 17 Jun 2026 | Direct | ||
| Ahmed Mohammed Shihab | WDC | Dividend Equivalent Rights | Award | 7% | 27.92 | 427 | 17 Jun 2026 | Direct | ||
| Ahmed Mohammed Shihab | WDC | Dividend Equivalent Rights | Options Exercise | -11.5% | -51.9 | 399 | 17 Jun 2026 | Direct | ||
| Kris Sennesael | WDC | Dividend Equivalent Rights | Award | 6.36% | 27.77 | 464 | 17 Jun 2026 | Direct | ||
| Roxanne Oulman | WDC | Dividend Equivalent Rights | Award | 18.4% | 0.33 | 2 | 17 Jun 2026 | Direct | ||
| Matthew E. Massengill | WDC | Dividend Equivalent Rights | Award | 5.83% | 6.11 | 111 | 17 Jun 2026 | Direct | ||
| Bruce E. Kiddoo | WDC | Dividend Equivalent Rights | Award | 18.4% | 0.33 | 2 | 17 Jun 2026 | Direct | ||
| Vidyadhara K. Gubbi | WDC | Dividend Equivalent Rights | Award | 6.31% | 14.08 | 237 | 17 Jun 2026 | Direct | ||
| Brad David Feller | WDC | Dividend Equivalent Rights | Award | 18.8% | 2.09 | 13 | 17 Jun 2026 | Direct | ||
| Tunc Doluca | WDC | Dividend Equivalent Rights | Award | 18.4% | 0.33 | 2 | 17 Jun 2026 | Direct | ||
| Brian Scott Davis | WDC | Dividend Equivalent Rights | Award | 6.28% | 11.7 | 198 | 17 Jun 2026 | Direct | ||
| Manuvir Das | WDC | Dividend Equivalent Rights | Award | 0.16 | 0 | 17 Jun 2026 | Direct | |||
| Martin I. Cole | WDC | Dividend Equivalent Rights | Award | 18.5% | 0.4 | 3 | 17 Jun 2026 | Direct | ||
| Kimberly Alexy | WDC | Dividend Equivalent Rights | Award | 18.4% | 0.33 | 2 | 17 Jun 2026 | Direct | ||
| Martin I. Cole | WDC | Common Stock | Sale | -2.75% | $385,924 | $536.01 | -720 | 25,433 | 09 Jun 2026 | Direct |
| Martin I. Cole | WDC | Common Stock | Sale | -11.1% | $1,676,600 | $511.16 | -3,280 | 26,153 | 09 Jun 2026 | Direct |
| Cynthia L. Tregillis | WDC | Common Stock | Sale | -0.37% | $235,699 | $545.60 | -432 | 116,643 | 05 Jun 2026 | Direct |
| Cynthia L. Tregillis | WDC | Common Stock | Tax liability | -0.59% | -699 | 117,075 | 03 Jun 2026 | Direct | ||
| Cynthia L. Tregillis | WDC | Common Stock | Options Exercise | 0.01% | 6 | 117,774 | 03 Jun 2026 | Direct | ||
| Cynthia L. Tregillis | WDC | Dividend Equivalent Rights | Options Exercise | -2.15% | -6.68 | 304 | 03 Jun 2026 | Direct | ||
| Vidyadhara K. Gubbi | WDC | Common Stock | Tax liability | -2.07% | -1,764 | 83,403 | 03 Jun 2026 | Direct | ||
| Vidyadhara K. Gubbi | WDC | Common Stock | Options Exercise | 0.02% | 13 | 85,167 | 03 Jun 2026 | Direct | ||
| Vidyadhara K. Gubbi | WDC | Dividend Equivalent Rights | Options Exercise | -5.65% | -13.37 | 223 | 03 Jun 2026 | Direct | ||
| Brian Scott Davis | WDC | Common Stock | Tax liability | -0.85% | -881 | 102,557 | 03 Jun 2026 | Direct | ||
| Brian Scott Davis | WDC | Common Stock | Options Exercise | 0.01% | 6 | 103,438 | 03 Jun 2026 | Direct | ||
| Brian Scott Davis | WDC | Dividend Equivalent Rights | Options Exercise | -3.46% | -6.68 | 186 | 03 Jun 2026 | Direct | ||
| Vidyadhara K. Gubbi | WDC | Common Stock | Sale | -2.82% | $1,376,694 | $556.24 | -2,475 | 85,154 | 01 Jun 2026 | Direct |
| Bruce E. Kiddoo | WDC | Common Stock | Sale | -16.1% | $396,390 | $528.52 | -750 | 3,903 | 28 May 2026 | Direct |
| Cynthia L. Tregillis | WDC | Common Stock | Sale | -0.18% | $115,481 | $539.63 | -214 | 117,157 | 27 May 2026 | Direct |
| Manuvir Das | WDC | Common Stock | Award | 772 | 772 | 26 May 2026 | Direct | |||
| Cynthia L. Tregillis | WDC | Common Stock | Tax liability | -0.65% | -771 | 117,371 | 25 May 2026 | Direct | ||
| Cynthia L. Tregillis | WDC | Common Stock | Options Exercise | 0.01% | 7 | 118,142 | 25 May 2026 | Direct | ||
| Cynthia L. Tregillis | WDC | Dividend Equivalent Rights | Options Exercise | -2.31% | -7.36 | 311 | 25 May 2026 | Direct | ||
| Irving Tan | WDC | Common Stock | Tax liability | -0.08% | -479 | 597,004 | 25 May 2026 | Direct | ||
| Irving Tan | WDC | Common Stock | Options Exercise | 0.01% | 30 | 597,483 | 25 May 2026 | Direct | ||
| Irving Tan | WDC | Dividend Equivalent Rights | Options Exercise | -3.32% | -30.33 | 882 | 25 May 2026 | Direct | ||
| Vidyadhara K. Gubbi | WDC | Common Stock | Tax liability | -1.29% | -1,143 | 87,629 | 25 May 2026 | Direct | ||
| Vidyadhara K. Gubbi | WDC | Common Stock | Options Exercise | 0.01% | 8 | 88,772 | 25 May 2026 | Direct | ||
| Vidyadhara K. Gubbi | WDC | Dividend Equivalent Rights | Options Exercise | -3.54% | -8.67 | 236 | 25 May 2026 | Direct | ||
| Brian Scott Davis | WDC | Common Stock | Tax liability | -0.93% | -971 | 103,300 | 25 May 2026 | Direct |
* marks a reported price that did not pass the local price check.