Western Digital (WDC)
Western Digital on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, financials, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as computer storage devices.
19.4M
Short interest
settlement 2026-10-15
1.9
Days to cover
-0.6 days vs prior
53.4%
Short share of volume
2026-10-28
104
Fails to deliver
settlement 2026-09-28
Thu 28 Jan
Next earnings
estimated date
-$13.9M
Insider flow, 90 days
0 buys, 17 sells
As of 2026-10-28.
Short interest
FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSONAs of 15 October 2026, short interest in WDC is 19,446,763 shares, up 2,166,376 shares over the last month. Over the last 48 readings it ranged from 16,253,399 shares (31 October 2024) to 39,478,138 shares (15 September 2025). At the reported average volume of 10.4M shares a day that is 1.9 days to cover.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 19,446,763 | +6.3% | 10,371,049 | 1.88 |
| 2026-09-30 | 18,293,625 | +5.9% | 7,454,522 | 2.45 |
| 2026-09-15 | 17,280,387 | -13.1% | 5,513,875 | 3.13 |
| 2026-08-31 | 19,887,791 | -1.9% | 6,339,096 | 3.14 |
| 2026-08-14 | 20,281,115 | -17.6% | 8,969,172 | 2.26 |
| 2026-07-31 | 24,599,617 | +5.8% | 7,746,818 | 3.18 |
| 2026-07-15 | 23,258,520 | +3.9% | 6,771,710 | 3.43 |
| 2026-06-30 | 22,377,149 | -15.4% | 13,782,339 | 1.62 |
| 2026-06-15 | 26,449,406 | -17.0% | 6,839,936 | 3.87 |
| 2026-05-29 | 31,871,127 | +7.1% | 6,354,309 | 5.02 |
| 2026-05-15 | 29,765,534 | +2.1% | 8,504,845 | 3.50 |
| 2026-04-30 | 29,140,914 | +8.9% | 6,972,831 | 4.18 |
| 2026-04-15 | 26,758,181 | +0.4% | 7,514,985 | 3.56 |
| 2026-03-31 | 26,653,778 | -3.3% | 9,490,772 | 2.81 |
| 2026-03-13 | 27,567,965 | -7.8% | 7,803,814 | 3.53 |
| 2026-02-27 | 29,882,601 | -5.4% | 8,889,193 | 3.36 |
| 2026-02-13 | 31,585,632 | +0.1% | 11,847,503 | 2.67 |
| 2026-01-30 | 31,540,967 | -5.9% | 10,697,494 | 2.95 |
| 2026-01-15 | 33,513,366 | -9.1% | 9,567,772 | 3.50 |
| 2025-12-31 | 36,866,308 | +17.6% | 8,128,699 | 4.54 |
| 2025-12-15 | 31,351,861 | +1.7% | 6,574,405 | 4.77 |
| 2025-11-28 | 30,825,377 | -8.3% | 7,839,656 | 3.93 |
| 2025-11-14 | 33,625,289 | +5.2% | 9,885,586 | 3.40 |
| 2025-10-31 | 31,956,205 | -6.5% | 10,294,390 | 3.10 |
| 2025-10-15 | 34,186,289 | -7.2% | 10,379,028 | 3.29 |
| 2025-09-30 | 36,849,266 | -6.7% | 9,545,267 | 3.86 |
| 2025-09-15 | 39,478,138 | +12.4% | 10,100,196 | 3.91 |
| 2025-08-29 | 35,113,585 | +5.4% | 5,520,442 | 6.36 |
| 2025-08-15 | 33,327,626 | +1.3% | 6,352,000 | 5.25 |
| 2025-07-31 | 32,892,936 | -0.4% | 8,147,828 | 4.04 |
| 2025-07-15 | 33,013,561 | -1.7% | 6,071,707 | 5.44 |
| 2025-06-30 | 33,598,539 | -2.9% | 6,484,953 | 5.18 |
| 2025-06-13 | 34,607,980 | +10.4% | 6,320,741 | 5.48 |
| 2025-05-30 | 31,355,996 | -1.7% | 5,828,725 | 5.38 |
| 2025-05-15 | 31,906,353 | +7.0% | 7,190,787 | 4.44 |
| 2025-04-30 | 29,812,134 | -2.2% | 6,967,184 | 4.28 |
| 2025-04-15 | 30,480,445 | -5.4% | 13,083,274 | 2.33 |
| 2025-03-31 | 32,213,986 | -3.8% | 5,980,494 | 5.39 |
| 2025-03-14 | 33,483,340 | +4.2% | 9,006,055 | 3.72 |
| 2025-02-28 | 32,123,617 | +8.6% | 9,358,656 | 3.43 |
| 2025-02-14 | 29,571,941 | +22.2% | 6,210,326 | 4.76 |
| 2025-01-31 | 24,194,111 | +10.6% | 8,246,333 | 2.93 |
| 2025-01-15 | 21,868,285 | +6.1% | 4,731,081 | 4.62 |
| 2024-12-31 | 20,603,680 | -1.2% | 5,505,773 | 3.74 |
| 2024-12-13 | 20,847,932 | -4.1% | 4,762,980 | 4.38 |
| 2024-11-29 | 21,744,437 | +20.1% | 5,698,040 | 3.82 |
| 2024-11-15 | 18,103,389 | +11.4% | 4,329,186 | 4.18 |
| 2024-10-31 | 16,253,399 | -9.3% | 6,362,798 | 2.55 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 28 October 2026, the short share of WDC volume is 53.4%, up 7.0 points over the last five sessions. Over the last 30 readings it ranged from 23.9% (15 October 2026) to 54.6% (21 September 2026). The latest reading sits at the top of that range. The latest reading is 11.9 points above the 30-session average of 41.6%, on 3.4M shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-10-28 | 1.8M | 3.4M | 53.4% | 5,099 |
| 2026-10-27 | 1.9M | 4.4M | 43.4% | 6,062 |
| 2026-10-26 | 1.7M | 5.2M | 33.4% | 2,328 |
| 2026-10-23 | 3.0M | 7.0M | 42.6% | 3,908 |
| 2026-10-22 | 2.0M | 5.2M | 38.5% | 11,402 |
| 2026-10-21 | 1.8M | 3.9M | 46.5% | 1,182 |
| 2026-10-20 | 1.8M | 4.2M | 44.3% | 7,480 |
| 2026-10-19 | 1.4M | 3.6M | 37.4% | 3,232 |
| 2026-10-16 | 1.5M | 3.9M | 37.1% | 11,638 |
| 2026-10-15 | 1.4M | 5.7M | 23.9% | 7,957 |
| 2026-10-14 | 1.0M | 3.2M | 32.7% | 13,925 |
| 2026-10-13 | 2.0M | 5.7M | 34.4% | 11,669 |
| 2026-10-12 | 1.1M | 2.7M | 40.3% | 7,782 |
| 2026-10-09 | 1.5M | 3.7M | 41.6% | 12,701 |
| 2026-10-08 | 1.6M | 3.8M | 42.0% | 1,978 |
| 2026-10-07 | 1.3M | 3.7M | 34.2% | 2,343 |
| 2026-10-06 | 3.2M | 6.1M | 51.9% | 15,368 |
| 2026-10-05 | 1.8M | 5.1M | 35.1% | 280,854 |
| 2026-10-02 | 5.8M | 11.5M | 50.6% | 696,431 |
| 2026-10-01 | 1.3M | 3.3M | 41.0% | 2,566 |
| 2026-09-30 | 2.0M | 4.0M | 49.7% | 2,928 |
| 2026-09-29 | 1.6M | 3.6M | 43.3% | 4,766 |
| 2026-09-28 | 1.7M | 4.2M | 40.9% | 2,730 |
| 2026-09-25 | 857K | 2.6M | 33.3% | 1,604 |
| 2026-09-24 | 1.0M | 3.0M | 35.3% | 2,685 |
| 2026-09-23 | 1.2M | 2.3M | 52.6% | 361 |
| 2026-09-22 | 1.7M | 3.4M | 49.3% | 5,852 |
| 2026-09-21 | 1.6M | 2.9M | 54.6% | 15,439 |
| 2026-09-18 | 1.0M | 2.6M | 39.3% | 424 |
| 2026-09-17 | 979K | 2.2M | 43.9% | 15,466 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 28 September 2026, the fails-to-deliver balance in WDC is 104 shares, down 182 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (7 August 2026) to 420,591 shares (9 June 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-09-28 | 104 | $456.81 | $48K |
| 2026-09-23 | 286 | $464.60 | $133K |
| 2026-09-18 | 1,268 | $423.87 | $537K |
| 2026-09-16 | 1 | $411.96 | $412 |
| 2026-09-10 | 1,179 | $482.28 | $569K |
| 2026-09-08 | 21,749 | $467.46 | $10.2M |
| 2026-08-17 | 654 | $508.80 | $333K |
| 2026-08-11 | 1 | $438.34 | $438 |
| 2026-08-07 | 1 | $451.52 | $452 |
| 2026-08-05 | 238 | $548.56 | $131K |
| 2026-08-03 | 1,100 | $544.84 | $599K |
| 2026-07-29 | 2,782 | $463.51 | $1.3M |
| 2026-07-20 | 1,556 | $477.22 | $743K |
| 2026-07-17 | 3,575 | $466.81 | $1.7M |
| 2026-07-14 | 1,079 | $555.55 | $599K |
| 2026-07-10 | 9,528 | $578.05 | $5.5M |
| 2026-07-09 | 11,250 | $550.30 | $6.2M |
| 2026-07-08 | 12,242 | $532.10 | $6.5M |
| 2026-07-07 | 13,714 | $577.46 | $7.9M |
| 2026-07-06 | 14,914 | $539.00 | $8.0M |
| 2026-07-02 | 15,722 | $598.37 | $9.4M |
| 2026-07-01 | 17,973 | $638.72 | $11.5M |
| 2026-06-30 | 95,125 | $651.88 | $62.0M |
| 2026-06-25 | 3,430 | $643.83 | $2.2M |
| 2026-06-22 | 164,945 | $746.23 | $123.1M |
| 2026-06-17 | 517 | $681.08 | $352K |
| 2026-06-15 | 2,026 | $562.93 | $1.1M |
| 2026-06-09 | 420,591 | $526.93 | $221.6M |
| 2026-06-05 | 900 | $575.50 | $518K |
| 2026-06-02 | 9 | $546.20 | $5K |
Insider trades
SEC Form 4, newest first. JSONInsiders at WDC reported 17 open-market sells worth $13.9M in the last 90 days and no open-market buys. Latest filing: Tregillis Cynthia L (Chief Legal Officer & Corp Sec) on 2026-10-21.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-10-21 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Sell | 807 | $380.00 | $307K | 109K |
| 2026-10-20 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Tax withholding | 1K | $364.32 | $477K | 110K |
| 2026-10-20 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Exercise or conversion | 14 | $0.00 | $0 | 111K |
| 2026-09-20 | Davis Brian Scott | Chief Sales & Mrktng Officer | Tax withholding | 963 | $441.36 | $425K | 99K |
| 2026-09-20 | Davis Brian Scott | Chief Sales & Mrktng Officer | Exercise or conversion | 8 | $0.00 | $0 | 100K |
| 2026-09-20 | Tan Irving | Chief Executive Officer | Tax withholding | 1K | $441.36 | $482K | 266K |
| 2026-09-20 | Tan Irving | Chief Executive Officer | Exercise or conversion | 57 | $0.00 | $0 | 267K |
| 2026-09-17 | Shihab Ahmed Mohammed | Chief Product Officer | Tax withholding | 5K | $423.87 | $2.2M | 159K |
| 2026-09-17 | Shihab Ahmed Mohammed | Chief Product Officer | Exercise or conversion | 56 | $0.00 | $0 | 164K |
| 2026-09-04 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Sell | 432 | $451.20 | $195K | 111K |
| 2026-09-04 | Gubbi Vidyadhara K | Chief of Global Operations | Sell | 2K | $459.87 | $825K | 81K |
| 2026-09-03 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Tax withholding | 700 | $441.57 | $309K | 111K |
| 2026-09-03 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Exercise or conversion | 7 | $0.00 | $0 | 112K |
| 2026-09-03 | Gubbi Vidyadhara K | Chief of Global Operations | Tax withholding | 2K | $441.57 | $779K | 82K |
| 2026-09-03 | Gubbi Vidyadhara K | Chief of Global Operations | Exercise or conversion | 14 | $0.00 | $0 | 84K |
| 2026-09-03 | Davis Brian Scott | Chief Sales & Mrktng Officer | Tax withholding | 882 | $441.57 | $389K | 100K |
| 2026-09-03 | Davis Brian Scott | Chief Sales & Mrktng Officer | Exercise or conversion | 7 | $0.00 | $0 | 101K |
| 2026-09-01 | Tan Irving | Chief Executive Officer | Gift | 113K | $0.00 | $0 | 113K |
| 2026-09-01 | Tan Irving | Chief Executive Officer | Gift | 113K | $0.00 | $0 | 0 |
| 2026-09-01 | STREETER STEPHANIE A | Director | Sell | 2K | $455.00 | $728K | 35K |
| 2026-08-31 | Tan Irving | Chief Executive Officer | Other transaction | 113K | $0.00 | $0 | 113K |
| 2026-08-31 | STREETER STEPHANIE A | Director | Sell | 2K | $448.58 | $897K | 36K |
| 2026-08-31 | Tan Irving | Chief Executive Officer | Other transaction | 113K | $0.00 | $0 | 267K |
| 2026-08-31 | STREETER STEPHANIE A | Director | Sell | 2K | $447.06 | $894K | 38K |
| 2026-08-27 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Sell | 1K | $478.36 | $482K | 112K |
| 2026-08-26 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Tax withholding | 2K | $468.88 | $765K | 113K |
| 2026-08-26 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Exercise or conversion | 9 | $0.00 | $0 | 115K |
| 2026-08-26 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Sell | 476 | $450.78 | $215K | 115K |
| 2026-08-26 | Tan Irving | Chief Executive Officer | Tax withholding | 3K | $468.88 | $1.6M | 379K |
| 2026-08-26 | Tan Irving | Chief Executive Officer | Exercise or conversion | 42 | $0.00 | $0 | 382K |
| 2026-08-26 | Shihab Ahmed Mohammed | Chief Product Officer | Tax withholding | 3K | $468.88 | $1.3M | 164K |
| 2026-08-26 | Shihab Ahmed Mohammed | Chief Product Officer | Exercise or conversion | 15 | $0.00 | $0 | 166K |
| 2026-08-26 | Sennesael Kris | Chief Financial Officer | Tax withholding | 4K | $468.88 | $2.0M | 174K |
| 2026-08-26 | Sennesael Kris | Chief Financial Officer | Exercise or conversion | 19 | $0.00 | $0 | 178K |
| 2026-08-26 | Gubbi Vidyadhara K | Chief of Global Operations | Tax withholding | 2K | $468.88 | $964K | 84K |
| 2026-08-26 | Gubbi Vidyadhara K | Chief of Global Operations | Exercise or conversion | 9 | $0.00 | $0 | 86K |
| 2026-08-26 | Davis Brian Scott | Chief Sales & Mrktng Officer | Tax withholding | 2K | $468.88 | $771K | 101K |
| 2026-08-26 | Davis Brian Scott | Chief Sales & Mrktng Officer | Exercise or conversion | 7 | $0.00 | $0 | 103K |
| 2026-08-25 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Grant | 4K | $0.00 | $0 | 115K |
| 2026-08-25 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Tax withholding | 771 | $450.75 | $348K | 111K |
| 2026-08-25 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Exercise or conversion | 7 | $0.00 | $0 | 112K |
| 2026-08-25 | Tan Irving | Chief Executive Officer | Grant | 17K | $0.00 | $0 | 382K |
| 2026-08-25 | Tan Irving | Chief Executive Officer | Tax withholding | 476 | $450.75 | $215K | 366K |
| 2026-08-25 | Tan Irving | Chief Executive Officer | Exercise or conversion | 32 | $0.00 | $0 | 366K |
| 2026-08-25 | Shihab Ahmed Mohammed | Chief Product Officer | Grant | 7K | $0.00 | $0 | 166K |
| 2026-08-25 | Sennesael Kris | Chief Financial Officer | Grant | 8K | $0.00 | $0 | 178K |
| 2026-08-25 | Gubbi Vidyadhara K | Chief of Global Operations | Grant | 5K | $0.00 | $0 | 86K |
| 2026-08-25 | Gubbi Vidyadhara K | Chief of Global Operations | Tax withholding | 1K | $450.75 | $515K | 81K |
| 2026-08-25 | Gubbi Vidyadhara K | Chief of Global Operations | Exercise or conversion | 9 | $0.00 | $0 | 82K |
| 2026-08-25 | Feller Brad | SVP & Chief Accounting Officer | Grant | 2K | $0.00 | $0 | 12K |
| 2026-08-25 | Davis Brian Scott | Chief Sales & Mrktng Officer | Grant | 4K | $0.00 | $0 | 103K |
| 2026-08-25 | Davis Brian Scott | Chief Sales & Mrktng Officer | Tax withholding | 971 | $450.75 | $438K | 99K |
| 2026-08-25 | Davis Brian Scott | Chief Sales & Mrktng Officer | Exercise or conversion | 7 | $0.00 | $0 | 100K |
| 2026-08-24 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Sell | 684 | $446.17 | $305K | 112K |
| 2026-08-21 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Tax withholding | 1K | $459.44 | $510K | 113K |
| 2026-08-21 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Exercise or conversion | 11 | $0.00 | $0 | 114K |
| 2026-08-21 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Sell | 235 | $477.27 | $112K | 114K |
| 2026-08-21 | Tan Irving | Chief Executive Officer | Tax withholding | 545 | $459.44 | $250K | 575K |
| 2026-08-21 | Tan Irving | Chief Executive Officer | Exercise or conversion | 25 | $0.00 | $0 | 576K |
| 2026-08-21 | Gubbi Vidyadhara K | Chief of Global Operations | Tax withholding | 694 | $459.44 | $319K | 82K |
| 2026-08-21 | Gubbi Vidyadhara K | Chief of Global Operations | Exercise or conversion | 5 | $0.00 | $0 | 83K |
| 2026-08-21 | Davis Brian Scott | Chief Sales & Mrktng Officer | Tax withholding | 593 | $459.44 | $272K | 100K |
| 2026-08-21 | Davis Brian Scott | Chief Sales & Mrktng Officer | Exercise or conversion | 4 | $0.00 | $0 | 101K |
| 2026-08-20 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Tax withholding | 379 | $469.05 | $178K | 114K |
| 2026-08-20 | Tregillis Cynthia L | Chief Legal Officer & Corp Sec | Exercise or conversion | 3 | $0.00 | $0 | 115K |
| 2026-08-20 | Tan Irving | Chief Executive Officer | Tax withholding | 144 | $469.05 | $68K | 576K |
| 2026-08-20 | Tan Irving | Chief Executive Officer | Exercise or conversion | 13 | $0.00 | $0 | 576K |
| 2026-08-20 | Gubbi Vidyadhara K | Chief of Global Operations | Tax withholding | 592 | $469.05 | $278K | 83K |
| 2026-08-20 | Gubbi Vidyadhara K | Chief of Global Operations | Exercise or conversion | 4 | $0.00 | $0 | 83K |
| 2026-08-20 | Davis Brian Scott | Chief Sales & Mrktng Officer | Tax withholding | 716 | $469.05 | $336K | 101K |
| 2026-08-20 | Davis Brian Scott | Chief Sales & Mrktng Officer | Exercise or conversion | 5 | $0.00 | $0 | 102K |
| 2026-08-11 | Tan Irving | Chief Executive Officer | Sell | 2K | $447.18 | $691K | 576K |
| 2026-08-11 | Tan Irving | Chief Executive Officer | Sell | 6K | $446.38 | $2.9M | 578K |
| 2026-08-11 | Tan Irving | Chief Executive Officer | Sell | 5K | $445.45 | $2.1M | 584K |
| 2026-08-11 | Tan Irving | Chief Executive Officer | Sell | 2K | $444.67 | $836K | 589K |
| 2026-08-11 | Tan Irving | Chief Executive Officer | Sell | 2K | $443.35 | $816K | 591K |
| 2026-08-11 | Tan Irving | Chief Executive Officer | Sell | 989 | $442.22 | $437K | 592K |
| 2026-08-11 | Tan Irving | Chief Executive Officer | Sell | 2K | $441.48 | $1.1M | 593K |
| 2026-07-28 | Cole Martin I | Director | Sell | 32 | $447.10 | $14K | 24K |
| 2026-07-28 | Cole Martin I | Director | Sell | 32 | $444.51 | $14K | 24K |
| 2026-07-28 | Cole Martin I | Director | Sell | 32 | $442.47 | $14K | 24K |
| 2026-07-28 | Cole Martin I | Director | Sell | 64 | $439.38 | $28K | 24K |
| 2026-07-28 | Cole Martin I | Director | Sell | 32 | $435.58 | $14K | 25K |
| 2026-07-28 | Cole Martin I | Director | Sell | 64 | $434.81 | $28K | 25K |
| 2026-07-28 | Cole Martin I | Director | Sell | 115 | $431.41 | $50K | 25K |
| 2026-07-28 | Cole Martin I | Director | Sell | 64 | $426.45 | $27K | 25K |
| 2026-07-28 | Cole Martin I | Director | Sell | 32 | $465.12 | $15K | 21K |
| 2026-07-28 | Cole Martin I | Director | Sell | 160 | $462.30 | $74K | 21K |
| 2026-07-28 | Cole Martin I | Director | Sell | 199 | $461.23 | $92K | 22K |
| 2026-07-28 | Cole Martin I | Director | Sell | 248 | $459.97 | $114K | 22K |
| 2026-07-28 | Cole Martin I | Director | Sell | 529 | $458.96 | $243K | 22K |
| 2026-07-28 | Cole Martin I | Director | Sell | 328 | $457.45 | $150K | 23K |
| 2026-07-28 | Cole Martin I | Director | Sell | 312 | $456.52 | $142K | 23K |
| 2026-07-28 | Cole Martin I | Director | Sell | 304 | $455.55 | $138K | 23K |
| 2026-07-28 | Cole Martin I | Director | Sell | 128 | $454.44 | $58K | 24K |
| 2026-07-28 | Cole Martin I | Director | Sell | 144 | $453.27 | $65K | 24K |
| 2026-07-28 | Cole Martin I | Director | Sell | 106 | $452.12 | $48K | 24K |
| 2026-07-28 | Cole Martin I | Director | Sell | 70 | $451.30 | $32K | 24K |
| 2026-07-28 | Cole Martin I | Director | Sell | 39 | $449.42 | $18K | 24K |
| 2026-07-28 | Cole Martin I | Director | Sell | 41 | $448.46 | $18K | 24K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
Planned sales (Form 144)
Newest first. JSON45 Form 144 notices on file for WDC worth $73.9M at the prices reported; 9 in the last 90 days worth $15.8M. Latest: CYNTHIA LOCK TREGILLIS filed on 2026-10-21 to sell 807 shares ($307K) from 2026-10-21.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-10-21 | CYNTHIA LOCK TREGILLISOfficer | 807 | $307K | 0.000% | 2026-10-21 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-04 | CYNTHIA LOCK TREGILLISOfficer | 432 | $195K | 0.000% | 2026-09-04 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-04 | VIDYADHARA K GUBBIOfficer | 2K | $825K | 0.000% | 2026-09-04 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-31 | STREETER STEPHANIE AASSOCIATED TO AFFILIATE | 10K | $4.5M | 0.003% | 2026-08-31 | FIDELITY BROKERAGE SERVICES LLC |
| 2026-08-27 | CYNTHIA LOCK TREGILLISOfficer | 1K | $482K | 0.000% | 2026-08-27 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-26 | CYNTHIA LOCK TREGILLISOfficer | 476 | $215K | 0.000% | 2026-08-26 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-24 | CYNTHIA LOCK TREGILLISOfficer | 684 | $305K | 0.000% | 2026-08-24 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-21 | CYNTHIA LOCK TREGILLISOfficer | 235 | $112K | 0.000% | 2026-08-21 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-11 | IRVING TANOfficer, Director | 20K | $8.9M | 0.006% | 2026-08-11 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-07-21 | CYNTHIA LOCK TREGILLISOfficer | 808 | $428K | 0.000% | 2026-07-21 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-05 | CYNTHIA LOCK TREGILLISOfficer | 432 | $236K | 0.000% | 2026-06-05 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-01 | VIDYADHARA K GUBBIOfficer | 2K | $1.4M | 0.001% | 2026-06-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-28 | KIDDOO FAMILY TRUST U/A DTD 02/07/2012Director | 750 | $396K | 0.000% | 2026-05-28 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-27 | CYNTHIA LOCK TREGILLISOfficer | 214 | $115K | 0.000% | 2026-05-27 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-22 | CYNTHIA LOCK TREGILLISOfficer | 308 | $150K | 0.000% | 2026-05-22 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-21 | CYNTHIA LOCK TREGILLISOfficer | 106 | $49K | 0.000% | 2026-05-21 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-11 | BRIAN SCOTT DAVISOfficer | 10K | $5.0M | 0.003% | 2026-05-11 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-04 | VIDYADHARA K GUBBIOfficer | 5K | $2.1M | 0.001% | 2026-05-04 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-01 | IRVING TANOfficer, Director | 20K | $8.2M | 0.006% | 2026-05-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-04-21 | CYNTHIA LOCK TREGILLISOfficer | 363 | $137K | 0.000% | 2026-04-21 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-03-06 | VIDYADHARA K GUBBIOfficer | 9K | $2.2M | 0.003% | 2026-03-06 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-03-04 | CYNTHIA LOCK TREGILLISOfficer | 9K | $2.3M | 0.003% | 2026-03-04 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-03-04 | CYNTHIA LOCK TREGILLISOfficer | 777 | $200K | 0.000% | 2026-03-04 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-03-04 | VIDYADHARA K GUBBIOfficer | 10K | $2.7M | 0.003% | 2026-03-04 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-03-02 | Martin I ColeAffiliate | 6K | $1.7M | 0.002% | 2026-03-02 | J.P. Morgan Securities LLC |
| 2026-02-26 | CYNTHIA LOCK TREGILLISOfficer | 214 | $61K | 0.000% | 2026-02-26 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-02-24 | CYNTHIA LOCK TREGILLISOfficer | 308 | $87K | 0.000% | 2026-02-24 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-02-23 | CYNTHIA LOCK TREGILLISOfficer | 130 | $37K | 0.000% | 2026-02-23 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-02-17 | BRIAN SCOTT DAVISOfficer | 10K | $2.8M | 0.003% | 2026-02-17 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-02-06 | CYNTHIA LOCK TREGILLISOfficer | 7K | $1.8M | 0.002% | 2026-02-06 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-02-05 | MASSENGILL LIVING TRUSTDirector | 37K | $9.9M | 0.011% | 2026-02-05 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-02-02 | IRVING TANOfficer, Director | 20K | $5.1M | 0.006% | 2026-02-02 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-01-21 | CYNTHIA LOCK TREGILLISOfficer | 447 | $102K | 0.000% | 2026-01-21 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-12-05 | VIDYADHARA K GUBBIOfficer | 6K | $1.1M | 0.002% | 2025-12-05 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-12-05 | VIDYADHARA K GUBBIOfficer | 2K | $414K | 0.001% | 2025-12-05 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-12-04 | VIDYADHARA K GUBBIOfficer | 14K | $2.2M | 0.004% | 2025-12-04 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-12-04 | KIMBERLY ALEXYDirector | 2K | $320K | 0.001% | 2025-12-04 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-12-02 | Cynthia LOCK TREGILLISOfficer | 3K | $450K | 0.001% | 2025-12-02 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-11-26 | GENE M ZAMISKAOfficer | 814 | $128K | 0.000% | 2025-11-26 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-11-25 | ROXANNE OULMANDirector | 2K | $278K | 0.001% | 2025-11-25 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-11-25 | KIMBERLY ALEXYDirector | 2K | $272K | 0.001% | 2025-11-25 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-11-24 | GENE M ZAMISKAOfficer | 458 | $65K | 0.000% | 2025-11-24 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-11-21 | GENE M ZAMISKAOfficer | 468 | $65K | 0.000% | 2025-11-21 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-11-05 | Martin I ColeAffiliate | 16K | $2.4M | 0.005% | 2025-11-05 | J.P. Morgan Securities LLC |
| 2025-11-03 | IRVING TANOfficer, Director | 20K | $3.0M | 0.006% | 2025-11-03 | Morgan Stanley Smith Barney LLC Executive Financial Services |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON3 holders report 5% or more of WDC in their latest filing, all on Schedule 13G (passive). The largest reported stake is Vanguard Capital Management at 7.5% of the class (25,402,917 shares), filed 2026-04-30 for an event on 2026-03-31.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-08-06 | 13G/Ano. 6 | FMR LLCparent holding company | 26.4M | 7.2% | 2026-06-30 |
| 2026-08-06 | 13G/Ano. 6 | Abigail P. Johnsonindividual | 26.4M | 7.2% | 2026-06-30 |
| 2026-07-31 | 13G/Ano. 1 | Vanguard Portfolio Managementinvestment adviser | 13.2M | 3.6% | 2026-06-30 |
| 2026-04-30 | 13G | Vanguard Capital Managementinvestment adviser | 25.4M | 7.5% | 2026-03-31 |
| 2026-03-27 | 13G/Ano. 14 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
| 2026-02-10 | 13G/Ano. 2 | MANAGED ACCOUNT ADVISORS LLCinvestment adviser | 9.0M | 2.6% | 2025-12-31 |
13F holders
Tracked managers holding WDC at their latest 13F. JSON9 of the 30 tracked managers held WDC at their latest 13F, $4.28B in total at quarter-end prices. AQR Capital Management is the largest at $1.88B (0.7% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 6 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| AQR Capital Management | 2026-06-30 | 2.9M | $1.88B | 0.65% | -519K |
| D. E. Shaw & Co. | 2026-06-30 | 1.9M | $1.21B | 0.58% | -786K |
| Citadel Advisors | 2026-06-30 | 658K | $420.2M | 0.05% | +392K |
| Renaissance Technologies | 2026-06-30 | 537K | $343.3M | 0.47% | -609K |
| Millennium Management | 2026-06-30 | 352K | $224.8M | 0.08% | +74K |
| Bridgewater Associates | 2026-06-30 | 172K | $110.1M | 0.45% | -77K |
| Point72 Asset Management | 2026-06-30 | 74K | $47.0M | 0.05% | -550K |
| Two Sigma Investments | 2026-06-30 | 49K | $31.0M | 0.02% | +47K |
| Fisher Asset Management | 2026-06-30 | 9K | $5.5M | 0.00% | -6K |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
Financials
SEC XBRL, as filed. JSONIn Q1 FY 2027 (quarter ended 2026-10-02) Western Digital reported revenue of $4.38B, up 55.5% from the same quarter a year earlier, and net income of $1.78B (4.63 diluted EPS). In FY 2026 it generated $3.93B of operating cash flow and spent $2.59B on buybacks and $174.0M on dividends.
- Cash
- $1.31B
- Equity
- $9.35B
- Total assets
- $14.24B
- Shares outstanding
- 374,323,269
Quarterly, last 8 quarters
| Quarter | Period end | Revenue | Net income | Margin | Diluted EPS |
|---|---|---|---|---|---|
| Q1 FY 2027 | 2026-10-02 | $4.38B | $1.78B | 40.6% | 4.63 |
| Q4 FY 2026derived | 2026-07-03 | $3.75B | $3.19B | 85.3% | n/a |
| Q3 FY 2026 | 2026-04-03 | $3.34B | $3.21B | 96.0% | 8.20 |
| Q2 FY 2026 | 2026-01-02 | $3.02B | $1.84B | 61.1% | 4.73 |
| Q1 FY 2026 | 2025-10-03 | $2.82B | $1.18B | 41.9% | 3.07 |
| Q4 FY 2025 | 2025-06-27 | $2.60B | $282.0M | 10.8% | 0.75 |
| Q3 FY 2025 | 2025-03-28 | $2.29B | $520.0M | 22.7% | 1.42 |
| Q2 FY 2025 | 2024-12-27 | $2.41B | $594.0M | 24.7% | 1.63 |
Fiscal years, with buybacks and dividends
| Fiscal year | Ends | Revenue | Net income | Operating cash flow | Capex | Buybacks | Dividends |
|---|---|---|---|---|---|---|---|
| FY 2026 | 2026-07-03 | $12.92B | $9.42B | $3.93B | $418.0M | $2.59B | $174.0M |
| FY 2025 | 2025-06-27 | $9.52B | $1.89B | $1.69B | $412.0M | $149.0M | $44.0M |
| FY 2024 | 2024-06-28 | $6.32B | -$798.0M | -$294.0M | $487.0M | $0 | $0 |
| FY 2022 | 2022-07-01 | $18.79B | $1.55B | $1.88B | $1.12B | n/a | $0 |
| FY 2021 | 2021-07-02 | $16.92B | $821.0M | $1.90B | $1.15B | $0 | $0 |
Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are the cash the company paid to repurchase its common stock in the year, not the amount authorized. Balance sheet lines are as of 2026-10-02; shares outstanding as of 2026-10-15 from the cover page.
What this page is
Western Digital in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows Western Digital (WDC), SEC CIK 106040, listed on Nasdaq, classified by the SEC as computer storage devices. The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-10-15.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-28.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-28.JSON and CSV
- Planned sales
- SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-10-21.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-08-06.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Financials
- SEC EDGAR 10-K and 10-Q filingsSource: SEC.Weekly; values are as filed in the 10-Q and 10-K. Latest 2026-10-02.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-10-22.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-10-21.JSON and CSV
- Company record
- EDGAR filing index for CIK 106040Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
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Datasets
Frequently Asked Questions
How much of WDC is sold short?
19,446,763 shares were held short at the 2026-10-15 settlement, 1.9 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is WDC's daily short volume?
On 2026-10-28, 1,812,771 of the 3,391,796 WDC shares reported to FINRA were sold short, 53.4% of the day's reported volume. Short volume is a flow for one day, not a position.
Does WDC have fails to deliver?
The SEC's latest file shows 104 WDC shares failed to deliver at settlement 2026-09-28. Fails are reported per settlement date and published twice a month with a lag.
Are WDC insiders buying or selling?
Insiders at WDC reported 17 open-market sells worth $13.9M in the last 90 days and no open-market buys. Latest filing: Tregillis Cynthia L (Chief Legal Officer & Corp Sec) on 2026-10-21.
Have WDC insiders filed to sell?
45 Form 144 notices on file for WDC worth $73.9M at the prices reported; 9 in the last 90 days worth $15.8M. Latest: CYNTHIA LOCK TREGILLIS filed on 2026-10-21 to sell 807 shares ($307K) from 2026-10-21.
Who owns 5% or more of WDC?
3 holders report 5% or more of WDC in their latest filing, all on Schedule 13G (passive). The largest reported stake is Vanguard Capital Management at 7.5% of the class (25,402,917 shares), filed 2026-04-30 for an event on 2026-03-31.
What did WDC report last quarter?
In Q1 FY 2027 (quarter ended 2026-10-02) Western Digital reported revenue of $4.38B, up 55.5% from the same quarter a year earlier, and net income of $1.78B (4.63 diluted EPS). In FY 2026 it generated $3.93B of operating cash flow and spent $2.59B on buybacks and $174.0M on dividends.
Which tracked 13F managers own WDC?
9 of the 30 tracked 13F managers held WDC shares at their latest filing, $4.28B in all. The largest: Cliff Asness's AQR Capital Management (2.9M shares, $1.88B), D. E. Shaw & Co. (1.9M shares, $1.21B), Ken Griffin's Citadel Advisors (658K shares, $420.2M), Renaissance Technologies (537K shares, $343.3M), Izzy Englander's Millennium Management (352K shares, $224.8M), Ray Dalio's Bridgewater Associates (172K shares, $110.1M). The table above lists all 9.
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.