Western Digital
WDC · NASDAQ
Who owns WDC
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 43.3% of WDC’s shares.
- Fidelity Management & Research Company LLC7.0%
- Vanguard Capital Management, LLC6.5%
- BlackRock Institutional Trust Company, N.A.5.8%
- Capital World Investors4.8%
- Next 6 largest institutions19.1%
- All other shareholders56.7%
| Holder | Shares | % of shares |
|---|---|---|
| Fidelity Management & Research Company LLC | 24.08M | 6.99% |
| Vanguard Capital Management, LLC | 22.51M | 6.53% |
| BlackRock Institutional Trust Company, N.A. | 19.99M | 5.80% |
| Capital World Investors | 16.60M | 4.82% |
| State Street Investment Management (US) | 16.28M | 4.72% |
| Vanguard Portfolio Management, LLC | 13.11M | 3.80% |
| Invesco Capital Management LLC | 11.98M | 3.48% |
| JP Morgan Asset Management | 11.58M | 3.36% |
| Geode Capital Management, L.L.C. | 8.41M | 2.44% |
| Norges Bank Investment Management (NBIM) | 4.63M | 1.34% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 10.98M | 3.18% |
| Vanguard 500 Index Fund | 9.05M | 2.63% |
| Invesco QQQ Trust | 7.41M | 2.15% |
| iShares Core S&P 500 ETF | 4.60M | 1.33% |
| Fidelity 500 Index Fund | 4.46M | 1.29% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $35.62M (128 trades) of WDC on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Tan Irving | Option exercise | 57 | — |
| Tan Irving | Tax withholding | 1.09K | $481.52K |
| Tan Irving | Option exercise | 57 | — |
| Davis Brian Scott | Option exercise | 8 | — |
| Davis Brian Scott | Tax withholding | 963 | $425.03K |
| Davis Brian Scott | Option exercise | 8 | — |
| Tregillis Cynthia L | Award | 27 | — |
| Tan Irving | Award | 83 | — |
| Shihab Ahmed Mohammed | Option exercise | 57 | — |
| Shihab Ahmed Mohammed | Award | 42 | — |
Congressional trades
Disclosed by members of Congress over the last 12 months
| Member | Type | Amount | Traded |
|---|---|---|---|
| Gilbert CisnerosHouse | Sale | $1K–$15K | Sep 18, 2026 |
| Ro KhannaHouse | Purchase | $1K–$15K | Apr 13, 2026 |
| Alan ArmstrongSenator | Purchase | $1K–$15K | Mar 27, 2026 |
Short interest
Settled Sep 30, 2026
- Shares short
- 18.29M
- Days to cover
- 2.45
- % of shares outstanding
- 5.31%
- Average daily volume
- 7.45M
- Change since last report
- +5.9%
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