Western Digital · ownership
Who owns Western Digital?
BlackRock, Inc. is the largest 13F holder: 10.2% of 13F-reported shares calc.
1,843 institutions report 323.1M Western Digital shares in Form 13F, as of quarter end Jun 30, 2026; −11.7M shares vs Mar 31, 2026.
- BlackRock, Inc.10.2%33.0M shares · −2.8M vs prior quarter (down) · 13F filed Aug 7, 2026
- FMR LLC8.0%26.0M shares · −5.6M vs prior quarter (down) · 13F filed Aug 13, 2026
- VANGUARD CAPITAL MANAGEMENT LLC7.0%22.5M shares · +476K vs prior quarter (up) · 13F filed Aug 13, 2026
- JPMORGAN CHASE & CO5.3%17.0M shares · −504K vs prior quarter (down) · 13F filed Aug 12, 2026
- Capital World Investors5.1%16.6M shares · +4.7M vs prior quarter (up) · 13F filed Aug 12, 2026
- STATE STREET CORP5.0%16.3M shares · +811K vs prior quarter (up) · 13F filed Aug 7, 2026
- Invesco Ltd.4.5%14.4M shares · +1.8M vs prior quarter (up) · 13F filed Aug 14, 2026
- VANGUARD PORTFOLIO MANAGEMENT LLC4.1%13.1M shares · −4.1M vs prior quarter (down) · 13F filed Aug 13, 2026
- GEODE CAPITAL MANAGEMENT, LLC2.6%8.4M shares · −1.1M vs prior quarter (down) · 13F filed Aug 12, 2026
- MORGAN STANLEY2.5%8.1M shares · +209K vs prior quarter (up) · 13F filed Aug 13, 2026
- BANK OF AMERICA CORP /DE/2.0%6.5M shares · −2.0M vs prior quarter (down) · 13F filed Aug 14, 2026
- GOLDMAN SACHS GROUP INC1.6%5.2M shares · −228K vs prior quarter (down) · 13F filed Aug 14, 2026
- UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC1.5%4.7M shares · +1.8M vs prior quarter (up) · 13F filed Aug 13, 2026
- NORGES BANK1.4%4.6M shares · +4.6M vs prior quarter (new position) · 13F filed Aug 12, 2026
- Nuveen, LLC1.2%3.8M shares · +860K vs prior quarter (up) · 13F filed Aug 11, 2026
- NORTHERN TRUST CORP1.1%3.7M shares · +57K vs prior quarter (up) · 13F filed Aug 13, 2026
- AMERIPRISE FINANCIAL INC1.0%3.4M shares · −2.4M vs prior quarter (down) · 13F filed Aug 14, 2026
- AQR CAPITAL MANAGEMENT LLC0.9%2.9M shares · −519K vs prior quarter (down) · 13F filed Aug 14, 2026
- Bank of New York Mellon Corp0.9%2.9M shares · +408K vs prior quarter (up) · 13F filed Aug 6, 2026
- Capital Research Global Investors0.9%2.8M shares · −493K vs prior quarter (down) · 13F filed Aug 12, 2026
Share of 13F-reported shares, not of shares outstanding. 13F covers managers with over $100M in US equities; it is not a full shareholder list.
Method and sources
Source: SEC Form 13F data sets (bulk). Each row links to the holder’s own 13F-HR filing. Holder names exactly as filed; one group can file under several names and CIKs (for example two Vanguard entities), and they are listed separately, as filed.
% = the holder’s shares ÷ all shares reported in 13F filings for this company and quarter (calculated by Hollsteen). This is not a share of shares outstanding. Change = shares vs the same filer’s 13F for the prior quarter (Mar 31, 2026).
Erroneous filings and rows are handled by a fixed rule set (restatements replace originals; non-equity rows and implausible rows excluded): 23 erroneous filings excluded or replaced this quarter. No market values are shown.
SEC filings only. No price or market data.
Who holds more than 5%?
3 current Schedule 13D/13G holders
Schedule 13D/13G filings (9) ›
- VANGUARD CAPITAL MANAGEMENT LLC 7.49%
13G filed Apr 30, 2026 · event date Mar 31, 2026
- FMR LLC 7.2%
13G/A filed Aug 6, 2026 · event date Jun 30, 2026 · 6 earlier filings
- JPMORGAN CHASE & CO 5.3%
13G/A filed Apr 22, 2025 · event date Mar 31, 2025 · 2 earlier filings
- VANGUARD PORTFOLIO MANAGEMENT LLC 3.6%
below 5% latest filing reports under 5% · 13G/A filed Jul 31, 2026 · event date Jun 30, 2026 · 1 earlier filing
- VANGUARD GROUP INC 0%
below 5% latest filing reports under 5% · 13G/A filed Mar 27, 2026 · event date Mar 13, 2026 · 7 earlier filings
- MANAGED ACCOUNT ADVISORS LLC 2.6%
below 5% latest filing reports under 5% · 13G/A filed Feb 10, 2026 · event date Dec 31, 2025 · 2 earlier filings
- PRICE T ROWE ASSOCIATES INC /MD/ 3.5%
stale filed Nov 14, 2024: older than 18 months, not a current holding · 13G/A filed Nov 14, 2024 · 2 earlier filings
- BlackRock Inc. 8.5%
stale filed Jan 25, 2024: older than 18 months, not a current holding · 13G/A filed Jan 25, 2024 · 7 earlier filings
- STATE STREET CORP 3.93%
stale filed Feb 13, 2018, as of Dec 31, 2017: older than 18 months, not a current holding · 13G/A filed Feb 13, 2018
Method and sources
Schedule 13D (active) and 13G (passive) are filed by holders of more than 5% of a class. The percentage is the holder’s own cover-page “percent of class”. A filing older than 18 months (filed before 2025-04-17) is marked stale and is never shown as a current holding. Data as of Oct 14, 2026.
SEC filings only.
Are insiders buying or selling?
0 open-market purchases, 224 sales in 12 months
Form 4, Oct 14, 2025 – Oct 14, 2026 · 0 shares bought, 254,343 shares sold (net −254K) · as of Oct 14, 2026
Latest 25 of 550 Form 4 transactions ›
| Date | Insider (as filed) | Transaction | Shares | Held after |
|---|---|---|---|---|
| Sep 20, 2026 | Tan Irving · Director; Chief Executive Officer | Option exercise / RSU conversion | 57 acquired | 266,704 |
| Sep 20, 2026 | Tan Irving · Director; Chief Executive Officer | Tax withholding | 1,091 disposed | 265,613 |
| Sep 20, 2026 | Davis Brian Scott · Chief Sales & Mrktng Officer | Option exercise / RSU conversion | 8 acquired | 100,454 |
| Sep 20, 2026 | Davis Brian Scott · Chief Sales & Mrktng Officer | Tax withholding | 963 disposed | 99,491 |
| Sep 17, 2026 | Shihab Ahmed Mohammed · Chief Product Officer | Option exercise / RSU conversion | 56 acquired | 163,758 |
| Sep 17, 2026 | Shihab Ahmed Mohammed · Chief Product Officer | Tax withholding | 5,150 disposed | 158,608 |
| Sep 4, 2026 | Tregillis Cynthia L · Chief Legal Officer & Corp Sec | Open-market sale · 10b5-1 | 432 disposed | 111,030 |
| Sep 4, 2026 | Gubbi Vidyadhara K · Chief of Global Operations | Open-market sale | 1,795 disposed | 80,571 |
| Sep 3, 2026 | Tregillis Cynthia L · Chief Legal Officer & Corp Sec | Option exercise / RSU conversion · 10b5-1 | 7 acquired | 112,162 |
| Sep 3, 2026 | Tregillis Cynthia L · Chief Legal Officer & Corp Sec | Tax withholding · 10b5-1 | 700 disposed | 111,462 |
| Sep 3, 2026 | Gubbi Vidyadhara K · Chief of Global Operations | Option exercise / RSU conversion | 14 acquired | 84,130 |
| Sep 3, 2026 | Gubbi Vidyadhara K · Chief of Global Operations | Tax withholding | 1,764 disposed | 82,366 |
| Sep 3, 2026 | Davis Brian Scott · Chief Sales & Mrktng Officer | Option exercise / RSU conversion | 7 acquired | 101,328 |
| Sep 3, 2026 | Davis Brian Scott · Chief Sales & Mrktng Officer | Tax withholding | 882 disposed | 100,446 |
| Sep 1, 2026 | Tan Irving · Director; Chief Executive Officer | Gift | 112,500 disposed | 0 |
| Sep 1, 2026 | Tan Irving · Director; Chief Executive Officer | Gift | 112,500 acquired | 112,500 |
| Sep 1, 2026 | STREETER STEPHANIE A · Director | Open-market sale | 1,600 disposed | 34,807 |
| Aug 31, 2026 | Tan Irving · Director; Chief Executive Officer | Other | 112,500 disposed | 266,647 |
| Aug 31, 2026 | Tan Irving · Director; Chief Executive Officer | Other | 112,500 acquired | 112,500 |
| Aug 31, 2026 | STREETER STEPHANIE A · Director | Open-market sale | 2,000 disposed | 38,407 |
| Aug 31, 2026 | STREETER STEPHANIE A · Director | Open-market sale | 2,000 disposed | 36,407 |
| Aug 27, 2026 | Tregillis Cynthia L · Chief Legal Officer & Corp Sec | Open-market sale · 10b5-1 | 1,007 disposed | 112,155 |
| Aug 26, 2026 | Tregillis Cynthia L · Chief Legal Officer & Corp Sec | Open-market sale · 10b5-1 | 476 disposed | 114,784 |
| Aug 26, 2026 | Tregillis Cynthia L · Chief Legal Officer & Corp Sec | Option exercise / RSU conversion · 10b5-1 | 9 acquired | 114,793 |
| Aug 26, 2026 | Tregillis Cynthia L · Chief Legal Officer & Corp Sec | Tax withholding · 10b5-1 | 1,631 disposed | 113,162 |
Method and sources
Form 4 filings (not 4/A), table I. Open market = transaction codes P (purchase) and S (sale); grants, option exercises, tax withholding and gifts are listed but not counted as buys or sells. Shares and share counts only, as filed; Hollsteen shows no per-share prices. Data is an export, as of Oct 14, 2026, not live.
SEC filings only.