WDC
Western Digital Corporation
366.10$
-7.4%
vs. previous close
Closing price · As of: Oct 30, 2026
Ownership
Ownership Structure
Who owns Western Digital Corporation (WDC)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 99.4% of the shares are freely tradable; institutional investors hold 101.2%.
Institutional ownership
?Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings.
101.2%
Insiders
?Share of the stock held by the executives, founders and major shareholders of the company itself.
0.5%
Float
?Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders.
99.4%
Short % of float
?Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices.
5.2%
Shares Outstanding
?Total number of shares issued. Price times share count gives market cap.
374Mio.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 8.80 | 32,953,613 | -7.9 | 06/30/2026 |
| FMR Inc | 6.94 | 25,983,645 | -17.8 | 06/30/2026 |
| Vanguard Capital Management, LLC | 6.01 | 22,510,811 | +2.2 | 06/30/2026 |
| JPMorgan Chase & Co | 4.54 | 17,007,789 | -2.9 | 06/30/2026 |
| Capital World Investors | 4.43 | 16,598,211 | +39.7 | 06/30/2026 |
| State Street Corp | 4.35 | 16,276,615 | +5.2 | 06/30/2026 |
| Amvescap Plc. | 3.86 | 14,435,741 | +14.1 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 3.50 | 13,109,474 | -23.7 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 2.92 | 10,940,645 | -0.1 | 09/30/2026 |
| Vanguard 500 Index Investor | 2.53 | 9,472,535 | +3.4 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Tan Irving | Chief Executive Officer | 490,613 | 179,613,319 $ | Aug 31, 2026 | both |
| Sennesael Kris | Chief Financial Officer | 173,709 | 63,594,865 $ | Aug 26, 2026 | direct |
| Shihab Ahmed Mohammed | Chief Product Officer | 158,608 | 58,066,389 $ | Sep 17, 2026 | direct |
| Tregillis Cynthia L | Chief Legal Officer & Corp Sec | 108,928 | 39,878,415 $ | Oct 21, 2026 | direct |
| Davis Brian Scott | Chief Sales & Mrktng Officer | 99,491 | 36,423,784 $ | Sep 20, 2026 | direct |
| Gubbi Vidyadhara K | Chief of Global Operations | 80,571 | 29,497,043 $ | Sep 4, 2026 | direct |
| Streeter Stephanie A | Director | 34,807 | 12,742,843 $ | Sep 1, 2026 | indirect |
| Cole Martin I | Director | 17,433 | 6,382,221 $ | Oct 29, 2026 | direct |
| Feller Brad | SVP & Chief Accounting Officer | 12,043 | 4,408,942 $ | Aug 25, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 29, 2026 | Cole Martin I | Director | Sell | 43 | 401.47 | 17,263 |
| Oct 29, 2026 | Cole Martin I | Director | Sell | 88 | 400.33 | 35,229 |
| Oct 29, 2026 | Cole Martin I | Director | Sell | 303 | 399.36 | 121,005 |
| Oct 29, 2026 | Cole Martin I | Director | Sell | 723 | 398.45 | 288,079 |
| Oct 29, 2026 | Cole Martin I | Director | Sell | 584 | 397.48 | 232,128 |
| Oct 29, 2026 | Cole Martin I | Director | Sell | 317 | 396.31 | 125,631 |
| Oct 29, 2026 | Cole Martin I | Director | Sell | 209 | 395.30 | 82,619 |
| Oct 29, 2026 | Cole Martin I | Director | Sell | 243 | 394.41 | 95,842 |
| Oct 29, 2026 | Cole Martin I | Director | Sell | 494 | 393.22 | 194,250 |
| Oct 29, 2026 | Cole Martin I | Director | Sell | 407 | 392.42 | 159,714 |
| Oct 29, 2026 | Cole Martin I | Director | Sell | 385 | 391.05 | 150,553 |
| Oct 29, 2026 | Cole Martin I | Director | Sell | 204 | 390.04 | 79,568 |
| Oct 21, 2026 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Sell | 807 | 380.00 | 306,660 |
| Oct 20, 2026 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Other | 1,310 | 364.32 | 477,259 |
| Oct 20, 2026 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Other | 14 | 0.00 | – |
| Sep 20, 2026 | Tan Irving | Chief Executive Officer | Other | 1,091 | 441.36 | 481,524 |
| Sep 20, 2026 | Tan Irving | Chief Executive Officer | Other | 57 | 0.00 | – |
| Sep 20, 2026 | Davis Brian Scott | Chief Sales & Mrktng Officer | Other | 963 | 441.36 | 425,030 |
| Sep 20, 2026 | Davis Brian Scott | Chief Sales & Mrktng Officer | Other | 8 | 0.00 | – |
| Sep 17, 2026 | Shihab Ahmed Mohammed | Chief Product Officer | Other | 5,150 | 423.87 | 2,182,931 |
| Sep 17, 2026 | Shihab Ahmed Mohammed | Chief Product Officer | Other | 56 | 0.00 | – |
| Sep 4, 2026 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Sell | 432 | 451.20 | 194,918 |
| Sep 4, 2026 | Gubbi Vidyadhara K | Chief of Global Operations | Sell | 1,795 | 459.87 | 825,472 |
| Sep 3, 2026 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Other | 700 | 441.57 | 309,099 |
| Sep 3, 2026 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Other | 7 | 0.00 | – |
| Sep 3, 2026 | Gubbi Vidyadhara K | Chief of Global Operations | Other | 1,764 | 441.57 | 778,929 |
| Sep 3, 2026 | Gubbi Vidyadhara K | Chief of Global Operations | Other | 14 | 0.00 | – |
| Sep 3, 2026 | Davis Brian Scott | Chief Sales & Mrktng Officer | Other | 882 | 441.57 | 389,465 |
| Sep 3, 2026 | Davis Brian Scott | Chief Sales & Mrktng Officer | Other | 7 | 0.00 | – |
| Sep 1, 2026 | Tan Irving | Chief Executive Officer | Other | 112,500 | 0.00 | – |
| Sep 1, 2026 | Streeter Stephanie A | Director | Sell | 1,600 | 455.00 | 728,000 |
| Aug 31, 2026 | Tan Irving | Chief Executive Officer | Other | 112,500 | 0.00 | – |
| Aug 31, 2026 | Streeter Stephanie A | Director | Sell | 2,000 | 448.58 | 897,160 |
| Aug 27, 2026 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Sell | 1,007 | 478.36 | 481,709 |
| Aug 26, 2026 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Other | 1,631 | 468.88 | 764,743 |
| Aug 26, 2026 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Other | 9 | 0.00 | – |
| Aug 26, 2026 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Sell | 476 | 450.78 | 214,571 |
| Aug 26, 2026 | Tan Irving | Chief Executive Officer | Other | 3,314 | 468.88 | 1,553,868 |
| Aug 26, 2026 | Tan Irving | Chief Executive Officer | Other | 42 | 0.00 | – |
| Aug 26, 2026 | Shihab Ahmed Mohammed | Chief Product Officer | Other | 2,741 | 468.88 | 1,285,200 |
| Aug 26, 2026 | Shihab Ahmed Mohammed | Chief Product Officer | Other | 15 | 0.00 | – |
| Aug 26, 2026 | Sennesael Kris | Chief Financial Officer | Other | 4,317 | 468.88 | 2,024,155 |
| Aug 26, 2026 | Sennesael Kris | Chief Financial Officer | Other | 19 | 0.00 | – |
| Aug 26, 2026 | Gubbi Vidyadhara K | Chief of Global Operations | Other | 2,056 | 468.88 | 964,017 |
| Aug 26, 2026 | Gubbi Vidyadhara K | Chief of Global Operations | Other | 9 | 0.00 | – |
| Aug 26, 2026 | Davis Brian Scott | Chief Sales & Mrktng Officer | Other | 1,644 | 468.88 | 770,839 |
| Aug 26, 2026 | Davis Brian Scott | Chief Sales & Mrktng Officer | Other | 7 | 0.00 | – |
| Aug 25, 2026 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Other | 3,878 | 0.00 | – |
| Aug 25, 2026 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Other | 771 | 450.75 | 347,528 |
| Aug 25, 2026 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Other | 7 | 0.00 | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: October 30, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.