WESTERN DIGITAL CORP (WDC)
Institutional ownership reported to the SEC as of Q2 2026, across 31 quarters.
1,768
Reporting holders
$236.4B
Reported value
88.7%
Of shares outstanding
13.7%
Held as options
+416
Holder change
Institutions report 319,694,160 shares against 360,540,944 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end. A figure this high can overstate: where an adviser and a sub-adviser both report the same shares, both are counted.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| BlackRock, Inc. | $21.0B | 32,953,613 | 0.31% | 8q | -7.9%-$1.8B |
| FMR LLC | $16.6B | 25,983,645 | 0.72% | 31q | -17.8%-$3.6B |
| VANGUARD CAPITAL MANAGEMENT LLC | $14.4B | 22,510,811 | 0.31% | 2q | +2.2%+$304.0M |
| JPMORGAN CHASE & CO | $11.3B | 17,007,789 | 0.63% | 31q | -2.9%-$335.6M |
| Capital World Investors | $10.6B | 16,598,211 | 1.25% | 3q | +39.7%+$3.0B |
| STATE STREET CORP | $10.4B | 16,276,615 | 0.31% | 31q | +5.2%+$517.9M |
| Invesco Ltd. | $9.2B | 14,435,741 | 0.73% | 31q | +14.1%+$1.1B |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $8.4B | 13,109,474 | 0.38% | 2q | -23.7%-$2.6B |
| JANE STREET GROUP, LLC | $8.2B | 1,052,246 | 0.68% | 31q | +2949.5%+$7.9B |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $7.2B | 515,710 | 0.56% | 31q | -9.3%-$739.1M |
| CITADEL ADVISORS LLC | $5.6B | 657,878 | 0.64% | 31q | +147.4%+$3.3B |
| GEODE CAPITAL MANAGEMENT, LLC | $5.4B | 8,411,628 | 0.29% | 31q | -11.2%-$678.1M |
| MORGAN STANLEY | $5.2B | 8,148,144 | 0.28% | 35q | +2.6%+$133.5M |
| BANK OF AMERICA CORP /DE/ | $4.1B | 6,489,630 | 0.27% | 31q | -23.6%-$1.3B |
| GOLDMAN SACHS GROUP INC | $4.1B | 5,178,993 | 0.36% | 31q | -4.2%-$180.1M |
| WELLS FARGO & COMPANY/MN | $3.1B | 863,445 | 0.50% | 31q | -57.9%-$4.3B |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $3.0B | 4,744,377 | 0.55% | 31q | +63.4%+$1.2B |
| NORGES BANK | $3.0B | 4,629,232 | 0.29% | 32q | +1.1%+$32.4M |
| Nuveen, LLC | $2.4B | 3,819,103 | 0.58% | 6q | +29.1%+$549.2M |
| NORTHERN TRUST CORP | $2.3B | 3,663,369 | 0.27% | 31q | +1.6%+$36.3M |
| IMC-Chicago, LLC | $2.3B | 93,724 | 0.55% | 19q | +24.1%+$446.3M |
| EXCHANGE TRADED CONCEPTS, LLC | $2.3B | 3,579,318 | 5.22% | 11q | +6897.7%+$2.3B |
| AMERIPRISE FINANCIAL INC | $2.2B | 3,386,190 | 0.44% | 31q | -70.6%-$5.2B |
| AQR CAPITAL MANAGEMENT LLC | $1.9B | 2,940,948 | 0.65% | 23q | -15.0%-$331.3M |
| BNP PARIBAS FINANCIAL MARKETS | $1.9B | 1,493,593 | 0.65% | 31q | +25.6%+$383.0M |
| Bank of New York Mellon Corp | $1.9B | 2,916,885 | 0.31% | 31q | +16.3%+$260.7M |
| D. E. Shaw & Co., Inc. | $1.8B | 1,901,787 | 0.87% | 31q | -29.3%-$757.8M |
| Capital Research Global Investors | $1.8B | 2,816,570 | 0.25% | 2q | -14.9%-$314.9M |
| PeakShares LLC | $1.6B | 2,535 | 1.20% | 2q | +407.0%+$1.3B |
| Legal & General Group Plc | $1.6B | 2,509,592 | 0.33% | 31q | +17.9%+$243.0M |
| DIMENSIONAL FUND ADVISORS LP | $1.6B | 2,448,137 | 0.28% | 31q | -2.2%-$35.3M |
| FRED ALGER MANAGEMENT, LLC | $1.4B | 2,206,326 | 4.70% | 5q | -17.1%-$289.7M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $1.4B | 2,132,395 | 0.18% | 31q | -3.4%-$47.6M |
| Sixth Street Partners Management Company, L.P. | $1.4B | 2,132,395 | 0.18% | new | NEW |
| VANGUARD FIDUCIARY TRUST CO | $1.3B | 1,979,131 | 0.28% | 2q | +3.7%+$45.2M |
| HSBC HOLDINGS PLC | $1.2B | 1,178,779 | 0.49% | 31q | -23.7%-$363.0M |
| Amundi | $1.2B | 1,814,033 | 0.28% | 21q | -40.7%-$795.1M |
| Capital International Investors | $1.2B | 1,803,588 | 0.24% | new | NEW |
| UBS Group AG | $1.1B | 1,258,485 | 0.14% | 31q | -69.9%-$2.5B |
| WCM INVESTMENT MANAGEMENT, LLC | $1.1B | 1,632,121 | 1.93% | 4q | -75.1%-$3.2B |
| BANK OF MONTREAL /CAN/ | $1.0B | 1,634,675 | 0.34% | 31q | +16.3%+$146.7M |
| BARCLAYS PLC | $1.0B | 832,598 | 0.19% | 31q | -20.7%-$261.3M |
| Anther Capital Ltd | $901.6M | 1,411,575 | 23.09% | 2q | +98.1%+$446.6M |
| DEUTSCHE BANK AG\ | $885.6M | 1,386,468 | 0.26% | 34q | -26.0%-$310.6M |
| National Pension Service | $882.0M | 1,380,902 | 0.57% | 31q | -4.0%-$36.4M |
| ROYAL BANK OF CANADA | $880.0M | 1,312,031 | 0.13% | 31q | +3.2%+$27.5M |
| Maple Rock Capital Partners Inc. | $867.3M | 1,357,834 | 17.01% | 30q | -3.0%-$27.2M |
| NATIONAL BANK OF CANADA /FI/ | $820.5M | 909,546 | 0.59% | 19q | +109.2%+$428.3M |
| Walleye Trading LLC | $764.0M | options only | 0.87% | 31q | OPTIONS |
| Caption Management, LLC | $652.8M | 1,000 | 3.04% | 21q | -75.0%-$2.0B |
| CITIGROUP INC | $647.7M | 1,007,000 | 0.21% | 31q | +75.9%+$279.5M |
| MILLENNIUM MANAGEMENT LLC | $633.3M | 351,962 | 0.23% | 30q | +26.8%+$133.7M |
| Qube Research & Technologies Ltd | $633.2M | 915,929 | 0.59% | 12q | HELD |
| Value Aligned Research Advisors, LLC | $631.3M | 988,429 | 1.57% | 2q | -23.7%-$196.1M |
| Trivest Advisors Ltd | $627.6M | 982,600 | 19.73% | 5q | +184.8%+$407.2M |
| Swiss National Bank | $623.4M | 975,987 | 0.33% | 31q | -2.7%-$17.4M |
| Castle Hook Partners LP | $577.0M | 903,374 | 2.65% | 5q | +2.8%+$15.6M |
| Mitsubishi UFJ Asset Management Co., Ltd. | $559.3M | 875,582 | 0.31% | 31q | +9.9%+$50.2M |
| WELLINGTON MANAGEMENT GROUP LLP | $551.3M | 863,206 | 0.10% | 14q | +2511.9%+$530.2M |
| Sumitomo Mitsui Trust Group, Inc. | $546.2M | 855,124 | 0.31% | 31q | +2.2%+$11.8M |
| AMF Tjanstepension AB | $543.5M | 850,847 | 3.22% | 7q | -38.1%-$334.1M |
| Clear Street Group Inc. | $522.4M | 817,892 | 1.32% | 2q | +239.7%+$368.6M |
| Polar Capital Holdings Plc | $506.7M | 793,276 | 1.20% | 4q | -18.4%-$114.4M |
| WT Asset Management Ltd | $500.9M | 784,212 | 9.91% | 4q | -4.0%-$20.8M |
| BANK OF NOVA SCOTIA | $500.3M | 783,212 | 0.76% | 31q | +115.7%+$268.3M |
| California Public Employees Retirement System | $490.4M | 767,793 | 0.28% | 31q | +14.3%+$61.4M |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | $478.1M | 748,606 | 0.72% | 3q | -16.0%-$91.4M |
| Vanguard Global Advisers, LLC | $477.1M | 746,976 | 0.22% | 2q | HELD |
| FIRST TRUST ADVISORS LP | $471.5M | 738,165 | 0.28% | 7q | +99.6%+$235.2M |
| FRANKLIN RESOURCES INC | $456.9M | 715,283 | 0.10% | 31q | +153.1%+$276.4M |
| PRINCIPAL FINANCIAL GROUP INC | $437.7M | 685,237 | 0.21% | 31q | +1.4%+$5.9M |
| VANGUARD ASSET MANAGEMENT, Ltd | $423.7M | 663,387 | 0.29% | 2q | +12.7%+$47.9M |
| Jericho Capital Asset Management L.P. | $411.8M | 644,764 | 3.40% | 2q | +10.9%+$40.4M |
| RHUMBLINE ADVISERS | $404.4M | 633,209 | 0.31% | 31q | +6.5%+$24.8M |
| Robeco Institutional Asset Management B.V. | $402.8M | 630,680 | 0.49% | 38q | -36.0%-$226.1M |
| NEUBERGER BERMAN GROUP LLC | $397.0M | 621,485 | 0.26% | 31q | +36.2%+$105.5M |
| Capula Management Ltd | $358.5M | 280,315 | 1.28% | 2q | HELD |
| RENAISSANCE TECHNOLOGIES LLC | $343.3M | 537,473 | 0.47% | 8q | -53.1%-$388.8M |
| PRIMECAP MANAGEMENT CO/CA/ | $329.9M | 516,440 | 0.20% | 31q | -10.5%-$38.8M |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | $314.2M | 491,970 | 0.24% | 4q | -40.6%-$214.4M |
| LPL Financial LLC | $308.0M | 482,293 | 0.07% | 31q | +21.5%+$54.6M |
| GROUP ONE TRADING LLC | $298.2M | 23,641 | 0.42% | 31q | HELD |
| SIMPLEX TRADING, LLC | $297.3M | 11,430 | 0.17% | 31q | +97.6%+$146.8M |
| NORDEA INVESTMENT MANAGEMENT AB | $295.3M | 455,363 | 0.24% | 31q | +19.7%+$48.6M |
| MARSHALL WACE, LLP | $286.6M | 400,306 | 0.23% | 23q | -57.0%-$380.2M |
| ENVESTNET ASSET MANAGEMENT INC | $281.6M | 440,889 | 0.07% | 31q | -37.1%-$166.4M |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | $277.9M | 434,683 | 0.28% | 31q | +16.4%+$39.1M |
| CANADA PENSION PLAN INVESTMENT BOARD | $271.6M | 425,171 | 0.15% | 6q | +27.3%+$58.2M |
| Squarepoint Ops LLC | $270.2M | 201,783 | 0.30% | 21q | -21.8%-$75.4M |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | $268.0M | 419,594 | 0.38% | 9q | +43.1%+$80.8M |
| SEI INVESTMENTS CO | $262.1M | 410,425 | 0.23% | 31q | -17.1%-$54.1M |
| PRUDENTIAL FINANCIAL INC | $261.2M | 408,974 | 0.28% | 31q | -33.7%-$132.6M |
| Whale Rock Capital Management LLC | $255.9M | 400,687 | 2.05% | 2q | -2.7%-$7.2M |
| ProShare Advisors LLC | $252.5M | 395,320 | 0.37% | 31q | -21.1%-$67.7M |
| Universal- Beteiligungs- und Servicegesellschaft mbH | $250.3M | 393,954 | 0.38% | 7q | -16.9%-$50.8M |
| PEAK6 LLC | $238.5M | 16,327 | 0.49% | 7q | -66.1%-$464.4M |
| ASSETMARK, INC | $233.1M | 364,895 | 0.40% | 31q | +52.7%+$80.4M |
| VOYA INVESTMENT MANAGEMENT LLC | $232.5M | 363,960 | 0.20% | 31q | -55.5%-$289.7M |
| VICTORY CAPITAL MANAGEMENT INC | $228.1M | 357,077 | 0.13% | 31q | -28.2%-$89.4M |
| NOMURA ASSET MANAGEMENT CO LTD | $227.9M | 356,832 | 0.49% | 31q | -29.9%-$97.4M |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-08-06 | 13G/A | FMR LLCwith 1 co-filers | 7.2% |
| 2026-07-31 | 13G/A | Vanguard Portfolio Management | 3.6% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 1,768 | $236.4B | 319,694,160 | 507 | 556 | 540 | 13.7% |
| Q1 2026 | 1,352 | $101.2B | 334,113,239 | 325 | 411 | 448 | 11.3% |
| Q4 2025 | 1,122 | $65.9B | 335,620,783 | 242 | 370 | 332 | 12.3% |
| Q3 2025 | 909 | $47.5B | 350,642,795 | 270 | 319 | 210 | 11.5% |
| Q2 2025 | 702 | $24.9B | 358,563,666 | 156 | 246 | 204 | 7.7% |
| Q1 2025 | 621 | $15.4B | 347,203,177 | 88 | 248 | 175 | 8.7% |
| Q4 2024 | 659 | $21.5B | 322,841,502 | 70 | 235 | 194 | 10.5% |
| Q3 2024 | 641 | $24.8B | 324,945,917 | 80 | 223 | 226 | 10.5% |
| Q2 2024 | 700 | $26.8B | 316,662,737 | 124 | 251 | 192 | 10.4% |
| Q1 2024 | 623 | $21.9B | 288,635,661 | 127 | 199 | 172 | 10.3% |
| Q4 2023 | 549 | $16.1B | 279,940,568 | 82 | 169 | 157 | 9.0% |
| Q3 2023 | 482 | $12.1B | 246,450,973 | 67 | 132 | 178 | 7.3% |
| Q2 2023 | 471 | $9.8B | 239,752,092 | 64 | 130 | 175 | 7.1% |
| Q1 2023 | 452 | $9.6B | 244,176,804 | 68 | 129 | 155 | 7.5% |
| Q4 2022 | 418 | $7.7B | 232,662,119 | 49 | 142 | 149 | 7.5% |
| Q3 2022 | 583 | $10.0B | 283,149,713 | 52 | 176 | 228 | 7.3% |
| Q2 2022 | 631 | $13.7B | 272,116,068 | 63 | 215 | 213 | 11.2% |
| Q1 2022 | 644 | $13.8B | 252,311,348 | 68 | 217 | 232 | 9.3% |
| Q4 2021 | 697 | $18.6B | 254,174,297 | 101 | 230 | 207 | 11.1% |
| Q3 2021 | 636 | $16.0B | 249,320,416 | 67 | 196 | 237 | 12.0% |
| Q2 2021 | 680 | $19.9B | 247,884,130 | 86 | 236 | 221 | 11.4% |
| Q1 2021 | 669 | $18.1B | 243,672,862 | 109 | 206 | 234 | 10.0% |
| Q4 2020 | 621 | $15.6B | 240,247,736 | 89 | 162 | 233 | 14.7% |
| Q3 2020 | 556 | $9.9B | 236,185,487 | 53 | 199 | 208 | 12.9% |
| Q2 2020 | 606 | $11.4B | 237,842,505 | 74 | 210 | 227 | 8.0% |
| Q1 2020 | 625 | $10.9B | 243,417,592 | 73 | 201 | 242 | 6.9% |
| Q4 2019 | 688 | $18.0B | 255,243,617 | 77 | 215 | 237 | 10.0% |
| Q3 2019 | 661 | $17.2B | 255,421,281 | 93 | 200 | 258 | 11.6% |
| Q2 2019 | 642 | $14.9B | 263,245,784 | 65 | 247 | 224 | 16.0% |
| Q1 2019 | 691 | $13.7B | 260,351,426 | 108 | 244 | 232 | 8.8% |
| Q4 2018 | 640 | $10.2B | 254,864,632 | 9 | 13 | 14 | 7.5% |