| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| FMR LLC | 10% | +44% | $5,937,572,262 | +$1,733,198,306 | 34,466,664 | +41% | FMR LLC | 31 Dec 2025 |
| JPMORGAN CHASE & CO | 5.3% | -20% | $751,336,970 | -$195,562,309 | 18,496,725 | -21% | JPMORGAN CHASE & CO. | 31 Mar 2025 |
| MANAGED ACCOUNT ADVISORS LLC | 2.6% | -54% | $1,914,895,075 | -$1,977,932,052 | 9,026,563 | -51% | MANAGED ACCOUNT ADVISORS LLC | 31 Dec 2025 |
As of 31 Dec 2025, 1,133 institutional investors reported holding 331,883,492 shares of WESTERN DIGITAL CORP - Common Stock (WDC). This represents 96% of the company’s total 347,175,500 outstanding shares.
The largest institutional shareholders of WESTERN DIGITAL CORP - Common Stock (WDC) together control 70% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| VANGUARD GROUP INC | 12% | 42,348,660 | -2.2% | 0.11% | $7,295,403,659 |
| BlackRock, Inc. | 10% | 35,509,518 | +2.3% | 0.1% | $6,117,224,662 |
| FMR LLC | 9.7% | 33,793,801 | +42% | 0.3% | $5,821,658,122 |
| STATE STREET CORP | 4.5% | 15,695,954 | +1.5% | 0.09% | $2,703,941,996 |
| JPMORGAN CHASE & CO | 4.1% | 14,295,965 | +19% | 0.17% | $2,462,766,329 |
| BANK OF AMERICA CORP /DE/ | 3.5% | 12,044,651 | -46% | 0.15% | $2,074,931,951 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.7% | 9,282,432 | -1.4% | 0.1% | $1,593,883,319 |
| MORGAN STANLEY | 2.6% | 8,944,662 | +6.5% | 0.09% | $1,540,897,488 |
| AMERIPRISE FINANCIAL INC | 2.5% | 8,520,425 | -1.9% | 0.33% | $1,467,814,250 |
| WCM INVESTMENT MANAGEMENT, LLC | 1.9% | 6,691,209 | -1.3% | 2.4% | $1,178,054,257 |
| D. E. Shaw & Co., Inc. | 1.6% | 5,701,318 | -41% | 0.75% | $982,166,052 |
| Invesco Ltd. | 1.6% | 5,455,243 | +23% | 0.14% | $939,774,714 |
| NORGES BANK | 1.3% | 4,578,446 | 0.08% | $788,728,892 | |
| Nuveen, LLC | 1.3% | 4,563,476 | +79% | 0.21% | $786,150,010 |
| GOLDMAN SACHS GROUP INC | 1.3% | 4,558,876 | +82% | 0.11% | $785,357,619 |
| UBS Group AG | 1.3% | 4,550,821 | -38% | 0.16% | $783,969,933 |
| NORTHERN TRUST CORP | 1.1% | 3,671,955 | -3.5% | 0.08% | $632,567,688 |
| DIMENSIONAL FUND ADVISORS LP | 1% | 3,565,342 | -6.3% | 0.13% | $614,316,015 |
| AQR CAPITAL MANAGEMENT LLC | 0.86% | 2,972,703 | +70% | 0.27% | $512,107,498 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.81% | 2,809,409 | +6% | 0.1% | $483,976,888 |
| FRED ALGER MANAGEMENT, LLC | 0.77% | 2,684,341 | -21% | 1.8% | $462,431,424 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 0.75% | 2,611,856 | +1.7% | 0.05% | $449,945,000 |
| Amundi | 0.69% | 2,399,736 | +86% | 0.13% | $413,402,520 |
| Maple Rock Capital Partners Inc. | 0.69% | 2,381,525 | -8% | 14% | $410,265,312 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.65% | 2,266,709 | -4.2% | 0.06% | $390,485,959 |
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2025 Q4 | 331,883,492 | $57,157,182,509 | -$1,818,540,541 | $172.27 | 1,133 |
| 2025 Q3 | 345,435,832 | $41,440,124,388 | -$1,535,544,744 | $120.06 | 951 |
| 2025 Q2 | 364,816,124 | $23,342,198,786 | +$1,123,278,161 | $63.99 | 739 |
| 2025 Q1 | 351,757,551 | $14,201,107,313 | +$258,623,965 | $40.43 | 647 |
| 2024 Q4 | 335,743,943 | $20,029,326,966 | +$599,750,977 | $59.63 | 700 |
| 2024 Q3 | 322,471,092 | $22,018,682,057 | -$1,008,797,716 | $68.29 | 686 |
| 2024 Q2 | 335,036,923 | $25,388,750,160 | +$2,493,792,892 | $75.77 | 744 |
| 2024 Q1 | 302,784,405 | $20,660,480,854 | +$263,410,433 | $68.24 | 665 |
| 2023 Q4 | 300,791,229 | $15,743,822,656 | +$914,253,649 | $52.37 | 598 |
| 2023 Q3 | 278,402,284 | $12,698,222,739 | +$450,082,597 | $45.63 | 529 |
| 2023 Q2 | 269,546,144 | $10,228,100,761 | -$92,478,558 | $37.93 | 528 |
| 2023 Q1 | 271,661,416 | $10,224,754,796 | -$121,799,785 | $37.67 | 527 |
| 2022 Q4 | 272,718,419 | $8,610,305,207 | +$27,933,930 | $31.55 | 512 |
| 2022 Q3 | 274,725,203 | $8,957,141,441 | +$223,285,442 | $32.55 | 551 |
| 2022 Q2 | 266,628,361 | $11,948,522,958 | +$687,443,720 | $44.83 | 610 |
| 2022 Q1 | 251,026,251 | $12,464,621,991 | -$180,500,144 | $49.65 | 618 |
| 2021 Q4 | 252,121,402 | $16,422,593,268 | +$331,163,722 | $65.21 | 670 |
| 2021 Q3 | 247,206,015 | $13,949,703,199 | +$44,551,145 | $56.44 | 603 |
| 2021 Q2 | 246,002,769 | $17,496,401,435 | +$272,251,173 | $71.17 | 665 |
| 2021 Q1 | 242,159,240 | $16,158,856,504 | +$278,189,015 | $66.75 | 648 |
| 2020 Q4 | 238,312,740 | $13,183,437,197 | +$213,782,076 | $55.39 | 601 |
| 2020 Q3 | 235,361,779 | $8,603,594,713 | -$112,407,229 | $36.55 | 535 |
| 2020 Q2 | 237,021,681 | $10,456,943,596 | -$185,522,175 | $44.15 | 590 |
| 2020 Q1 | 241,122,876 | $10,034,197,556 | -$399,716,212 | $41.62 | 596 |
| 2019 Q4 | 248,393,940 | $15,782,722,333 | -$369,501,894 | $63.47 | 670 |
| 2019 Q3 | 253,999,153 | $15,147,876,005 | -$182,972,159 | $59.64 | 638 |
| 2019 Q2 | 257,956,628 | $12,269,785,410 | +$73,507,720 | $47.55 | 625 |
| 2019 Q1 | 259,911,330 | $12,493,914,455 | +$600,828,925 | $48.06 | 662 |
| 2018 Q4 | 247,855,679 | $9,164,663,033 | -$127,195,436 | $36.97 | 613 |
| 2018 Q3 | 245,422,737 | $14,356,874,790 | -$194,562,317 | $58.54 | 678 |
| 2018 Q2 | 246,465,038 | $19,084,355,780 | -$800,779,355 | $77.41 | 782 |
| 2018 Q1 | 254,873,531 | $23,489,784,530 | +$313,476,835 | $92.27 | 798 |
| 2017 Q4 | 252,315,759 | $20,054,256,381 | -$21,088,952 | $79.53 | 775 |
| 2017 Q3 | 250,640,237 | $21,655,947,117 | +$461,708,664 | $86.40 | 749 |
| 2017 Q2 | 245,268,583 | $21,733,652,904 | +$337,066,673 | $88.60 | 762 |
| 2017 Q1 | 242,976,352 | $20,053,954,791 | +$1,208,554,532 | $82.53 | 722 |
| 2016 Q4 | 245,824,707 | $16,702,925,102 | -$471,267,064 | $67.95 | 698 |
| 2016 Q3 | 252,815,257 | $14,775,486,199 | +$247,789,845 | $58.47 | 636 |
| 2016 Q2 | 250,063,633 | $11,816,864,059 | +$950,876,931 | $47.26 | 619 |
| 2016 Q1 | 228,649,623 | $10,796,984,236 | +$733,785,287 | $47.24 | 559 |
| 2015 Q4 | 212,076,589 | $12,739,213,712 | +$217,502,558 | $60.05 | 558 |
| 2015 Q3 | 206,610,065 | $16,390,256,791 | +$61,085,804 | $79.44 | 538 |
| 2015 Q2 | 206,504,862 | $16,206,390,315 | +$140,758,438 | $78.42 | 572 |
| 2015 Q1 | 204,283,950 | $18,601,298,890 | -$213,019,144 | $91.01 | 597 |
| 2014 Q4 | 206,181,894 | $22,815,171,850 | +$665,913,335 | $110.70 | 600 |
| 2014 Q3 | 199,297,592 | $19,391,968,757 | +$92,758,379 | $97.32 | 565 |
| 2014 Q2 | 198,199,056 | $18,302,445,981 | -$207,954,145 | $92.30 | 548 |
| 2014 Q1 | 200,225,949 | $18,377,288,071 | -$47,792,752 | $91.82 | 542 |