Western Digital Corporation (WDC) Ownership
WDC ownership summary
as of October 18, 2026- Institutions
- 88.9% of shares outstanding
- Insiders
- 0.27% of shares outstanding
- Shares outstanding
- 374.3M
- Float
- 358.2M shares available to trade
- Short interest
- 4.90% 18.3M shares short
- Days to cover
- 2.77 short interest up 5.9% vs prior month
- Institutions 88.88%
- Insiders 0.27%
- Other investors 10.85%
WDC top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 8.80% | 33.0M | $10.94B | −2.8M (−7.9%) | June 30, 2026 |
| 2 | FMR Inc | 6.94% | 26.0M | $8.63B | −5.6M (−17.8%) | June 30, 2026 |
| 3 | Vanguard Capital Management, LLC | 6.01% | 22.5M | $7.47B | +475,950 (+2.2%) | June 30, 2026 |
| 4 | JPMorgan Chase & Co | 4.54% | 17.0M | $5.65B | −504,359 (−2.9%) | June 30, 2026 |
| 5 | Capital World Investors | 4.43% | 16.6M | $5.51B | +4.7M (+39.7%) | June 30, 2026 |
| 6 | State Street Corp | 4.35% | 16.3M | $5.40B | +810,849 (+5.2%) | June 30, 2026 |
| 7 | Amvescap Plc. | 3.86% | 14.4M | $4.79B | +1.8M (+14.1%) | June 30, 2026 |
| 8 | Vanguard Portfolio Management, LLC | 3.50% | 13.1M | $4.35B | −4.1M (−23.7%) | June 30, 2026 |
| 9 | Geode Capital Management, LLC | 2.25% | 8.4M | $2.79B | −1.1M (−11.2%) | June 30, 2026 |
| 10 | Morgan Stanley - Brokerage Accounts | 2.18% | 8.1M | $2.71B | +209,038 (+2.6%) | June 30, 2026 |
| 11 | Bank of America Corp | 1.73% | 6.5M | $2.15B | −2.0M (−23.6%) | June 30, 2026 |
| 12 | The Goldman Sachs Group Inc | 1.38% | 5.2M | $1.72B | −227,890 (−4.2%) | June 30, 2026 |
| 13 | UBS Asset Mgmt Americas Inc | 1.27% | 4.7M | $1.58B | +1.8M (+63.4%) | June 30, 2026 |
| 14 | NORGES BANK | 1.24% | 4.6M | $1.54B | +50,786 (+1.1%) | June 30, 2026 |
| 15 | Nuveen, LLC | 1.02% | 3.8M | $1.27B | +859,858 (+29.1%) | June 30, 2026 |
| 16 | Northern Trust Corp | 0.98% | 3.7M | $1.22B | +56,806 (+1.6%) | June 30, 2026 |
| 17 | Ameriprise Financial Inc | 0.90% | 3.4M | $1.12B | −2.4M (−41.2%) | June 30, 2026 |
| 18 | AQR Capital Management LLC | 0.79% | 2.9M | $976.4M | −518,617 (−15.0%) | June 30, 2026 |
| 19 | Bank of New York Mellon Corp | 0.78% | 2.9M | $968.4M | +408,133 (+16.3%) | June 30, 2026 |
| 20 | Capital Research Global Investors | 0.75% | 2.8M | $935.1M | −493,055 (−14.9%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 10 holders added 11.2M shares and 10 cut 19.7M.
WDC top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 2.93% | 11.0M | $3.64B | −22,076 (−0.2%) | August 31, 2026 |
| 2 | Vanguard 500 Index Investor | 2.53% | 9.5M | $3.14B | +312,940 (+3.4%) | September 30, 2026 |
| 3 | Invesco QQQ Trust | 2.01% | 7.5M | $2.50B | −12,276 (−0.2%) | September 30, 2026 |
| 4 | American Funds American Balanced A | 1.39% | 5.2M | $1.73B | +1.3M (+33.2%) | September 30, 2026 |
| 5 | American Funds Fundamental Invs A | 1.38% | 5.2M | $1.72B | +730,038 (+16.4%) | September 30, 2026 |
| 6 | iShares Core S&P 500 ETF | 1.28% | 4.8M | $1.59B | −7,733 (−0.2%) | September 30, 2026 |
| 7 | Fidelity 500 Index | 1.20% | 4.5M | $1.49B | +17,184 (+0.4%) | August 31, 2026 |
| 8 | State Street® SPDR® S&P 500® ETF | 1.18% | 4.4M | $1.47B | — | September 30, 2026 |
| 9 | Vanguard MStar Growth Index Investor | 1.01% | 3.8M | $1.25B | +123,772 (+3.4%) | September 30, 2026 |
| 10 | American Funds Growth Fd of Amer A | 0.99% | 3.7M | $1.24B | +645,382 (+21.0%) | September 30, 2026 |
| 11 | Fidelity Blue Chip Growth | 0.80% | 3.0M | $996.8M | +68,900 (+2.3%) | August 31, 2026 |
| 12 | American Funds New Economy A | 0.79% | 3.0M | $980.6M | +181,973 (+6.6%) | September 30, 2026 |
| 13 | Fidelity Select Semiconductors | 0.77% | 2.9M | $963.0M | +50,500 (+1.8%) | August 31, 2026 |
| 14 | State Street®TechSelSectSPDR®ETF | 0.69% | 2.6M | $863.7M | +1,600 (+0.1%) | September 30, 2026 |
| 15 | Vanguard Information Technology ETF | 0.64% | 2.4M | $801.0M | +5,552 (+0.2%) | September 30, 2026 |
| 16 | Roundhill Memory ETF | 0.55% | 2.1M | $689.6M | −10,032 (−0.5%) | September 30, 2026 |
| 17 | Vanguard Institutional Index I | 0.51% | 1.9M | $633.2M | +64,552 (+3.5%) | September 30, 2026 |
| 18 | Fidelity Select Technology | 0.51% | 1.9M | $631.8M | −747,839 (−28.2%) | August 31, 2026 |
| 19 | American Funds AMCAP A | 0.50% | 1.9M | $617.4M | +361,767 (+24.2%) | September 30, 2026 |
| 20 | JPMorgan Large Cap Growth I | 0.47% | 1.8M | $589.2M | −1.8M (−49.9%) | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
WDC insider transactions
latest 20| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-04-21 | Cynthia L Tregillis | Sell | $377.09 | 363 | $136,884 |
| 2026-03-23 | Ro Khanna | Sell | $294.79 | — | — |
| 2026-03-06 | Vidyadhara K Gubbi | Sell | $255.32 | 8,518 | $2.2M |
| 2026-03-04 | Cynthia L Tregillis | Sell | $268.27 | 9,324 | $2.5M |
| 2026-03-04 | Vidyadhara K Gubbi | Sell | $270.31 | 10,148 | $2.7M |
| 2026-02-26 | Cynthia L Tregillis | Sell | $286.11 | 214 | $61,228 |
| 2026-02-24 | Cynthia L Tregillis | Sell | $281.70 | 308 | $86,764 |
| 2026-02-23 | Cynthia L Tregillis | Sell | $283.83 | 130 | $36,898 |
| 2026-02-06 | Cynthia L Tregillis | Sell | $270.49 | 6,780 | $1.8M |
| 2026-02-05 | Matthew E Massengill | Sell | $260.43 | 36,926 | $9.6M |
| 2026-02-05 | Ro Khanna | Sell | $260.19 | — | — |
| 2026-02-02 | Irving Tan | Sell | $255.44 | 20,000 | $5.1M |
| 2026-01-29 | Ro Khanna | Buy | $278.41 | — | — |
| 2026-01-21 | Cynthia L Tregillis | Sell | $229.00 | 447 | $102,363 |
| 2025-12-02 | Cynthia L Tregillis | Sell | $160.57 | 2,801 | $449,757 |
| 2025-11-25 | Kimberly Alexy | Sell | $154.00 | 1,768 | $272,272 |
| 2025-11-25 | Roxanne Oulman | Sell | $154.42 | 1,800 | $277,956 |
| 2025-11-03 | Irving Tan | Sell | $150.69 | 20,000 | $3.0M |
| 2025-09-04 | Vidyadhara K Gubbi | Sell | $90.29 | 11,343 | $1.0M |
| 2025-08-28 | Gene M Zamiska | Sell | $80.90 | 353 | $28,558 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
WDC shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns WDC
Institutional investors own 88.9% of Western Digital's shares and insiders 0.27%. The largest holder is BlackRock Inc with 8.80% of the shares (33.0M), as of June 30, 2026. Among the top 20 institutions, 10 added shares and 10 reduced their stake in the latest filings. Short interest is 4.90% of the float, or 2.77 days of average trading volume. The share count rose 58.0% since 2014.
Related: WDC analyst forecast, WDC key metrics, WDC dividend history. See the WDC stock overview for the latest quote and news.
WDC ownership FAQ
Who owns the most Western Digital stock?
The largest shareholders of Western Digital are BlackRock Inc (8.80%), FMR Inc (6.94%), Vanguard Capital Management, LLC (6.01%), JPMorgan Chase & Co (4.54%), Capital World Investors (4.43%).
What percentage of Western Digital is owned by institutions?
Institutions hold 88.9% of Western Digital's shares outstanding; insiders hold 0.27%.
Which funds own Western Digital?
The largest fund holders of Western Digital are Vanguard MStar Total Stk Mkt Idx Invest (2.93%), Vanguard 500 Index Investor (2.53%), Invesco QQQ Trust (2.01%), American Funds American Balanced A (1.39%), American Funds Fundamental Invs A (1.38%).
What is Western Digital's short interest?
18.3M shares of Western Digital were sold short, 4.90% of the float; at the average daily volume it would take 2.77 days to cover.
Are insiders buying or selling Western Digital?
Of the latest 20 reported insider transactions in Western Digital (since August 28, 2025), 1 were purchases and 19 were sales.
How many shares of Western Digital are outstanding?
Western Digital has 374.3M shares outstanding, of which 358.2M are in the public float.