Who owns Western Digital (WDC)
Which tracked institutional funds hold WDC, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See WDC company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on WDC is one-sided between 2026-Q1 and 2026-Q2: 1108 added or opened and 146 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
WDC’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.3% of its own reported 13F book, while the median holder sizes it at 0.3% of theirs — a 0.0pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in WDC divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 1761 tracked filers holding WDC, 1086 increased or opened the position and 737 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in WDC between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 171
- Capital International Investors$1.2B
- BOUSSARD & GAVAUDAN GESTION SAS$752M
- Qube Research & Technologies Ltd$585M
- KEYSTONE INVESTORS PTE LTD$188M
- Capula Management Ltd$179M
- Nykredit A/S$157M
Full exits 103
- Amundi$827M
- Soroban Capital Partners LP$310M
- Clal Insurance Enterprises Holdings Ltd$175M
- ACADIAN ASSET MANAGEMENT LLC$170M
- NATIXIS ADVISORS, LLC$115M
- Employees Provident Fund Board$110M
Largest adds
- BlackRock, Inc.$11.8B
- VANGUARD CAPITAL MANAGEMENT LLC$8.4B
- FMR LLC$8.0B
- Capital World Investors$7.4B
- Invesco Ltd.$7.3B
- JPMORGAN CHASE & CO$6.7B
Largest trims
- WCM INVESTMENT MANAGEMENT, LLC$587M
- UBS Group AG$327M
- Holocene Advisors, LP$156M
- Point72 Asset Management, L.P.$122M
- BALYASNY ASSET MANAGEMENT L.P.$67M
- 1832 Asset Management L.P.$43M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. trimmed | 32,953,613 | $21.0B | 11.5% | 2026-Q2 |
| FMR LLC trimmed | 25,983,645 | $16.6B | 9.1% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 22,510,811 | $14.4B | 7.8% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 17,007,789 | $11.1B | 6.0% | 2026-Q2 |
| Capital World Investors added | 16,598,211 | $10.6B | 5.8% | 2026-Q2 |
| STATE STREET CORP added | 16,276,615 | $10.4B | 5.7% | 2026-Q2 |
| Invesco Ltd. added | 14,435,741 | $9.2B | 5.0% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC trimmed | 13,109,474 | $8.4B | 4.6% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 8,411,628 | $5.4B | 2.9% | 2026-Q2 |
| MORGAN STANLEY added | 8,148,144 | $5.2B | 2.8% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 6,489,630 | $4.1B | 2.3% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 5,178,993 | $3.3B | 1.8% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 4,744,377 | $3.0B | 1.7% | 2026-Q2 |
| NORGES BANK trimmed | 4,629,232 | $3.0B | 1.6% | 2026-Q2 |
| Nuveen, LLC added | 3,819,103 | $2.4B | 1.3% | 2026-Q2 |
| NORTHERN TRUST CORP added | 3,663,369 | $2.3B | 1.3% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 3,386,190 | $2.2B | 1.2% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 2,940,948 | $1.9B | 1.0% | 2026-Q2 |
| Bank of New York Mellon Corp added | 2,916,885 | $1.9B | 1.0% | 2026-Q2 |
| Capital Research Global Investors trimmed | 2,816,570 | $1.8B | 1.0% | 2026-Q2 |
| Legal & General Group Plc added | 2,509,592 | $1.6B | 0.9% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 2,448,137 | $1.6B | 0.9% | 2026-Q2 |
| FRED ALGER MANAGEMENT, LLC trimmed | 2,206,326 | $1.4B | 0.8% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 2,132,395 | $1.4B | 0.7% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 2,075,801 | $1.3B | 0.7% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 1,979,131 | $1.3B | 0.7% | 2026-Q2 |
| D. E. Shaw & Co., Inc. trimmed | 1,901,787 | $1.2B | 0.7% | 2026-Q2 |
| Capital International Investors new | 1,803,588 | $1.2B | 0.6% | 2026-Q2 |
| EXCHANGE TRADED CONCEPTS, LLC added | 1,789,659 | $1.1B | 0.6% | 2026-Q2 |
| BANK OF MONTREAL /CAN/ added | 1,634,675 | $1.0B | 0.6% | 2026-Q2 |
| WCM INVESTMENT MANAGEMENT, LLC trimmed | 1,632,121 | $1.1B | 0.6% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 1,493,593 | $954M | 0.5% | 2026-Q2 |
| Anther Capital Ltd added | 1,411,575 | $902M | 0.5% | 2026-Q2 |
| DEUTSCHE BANK AG\ trimmed | 1,386,468 | $886M | 0.5% | 2026-Q2 |
| National Pension Service trimmed | 1,380,902 | $882M | 0.5% | 2026-Q2 |
| Maple Rock Capital Partners Inc. trimmed | 1,357,834 | $867M | 0.5% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 1,312,031 | $838M | 0.5% | 2026-Q2 |
| UBS Group AG trimmed | 1,258,485 | $804M | 0.4% | 2026-Q2 |
| HSBC HOLDINGS PLC trimmed | 1,178,779 | $753M | 0.4% | 2026-Q2 |
| JANE STREET GROUP, LLC added | 1,052,246 | $672M | 0.4% | 2026-Q2 |
| CITIGROUP INC added | 1,007,000 | $643M | 0.4% | 2026-Q2 |
| Value Aligned Research Advisors, LLC trimmed | 988,429 | $631M | 0.3% | 2026-Q2 |
| Trivest Advisors Ltd added | 982,600 | $628M | 0.3% | 2026-Q2 |
| Swiss National Bank trimmed | 975,987 | $623M | 0.3% | 2026-Q2 |
| Qube Research & Technologies Ltd added | 915,929 | $585M | 0.3% | 2026-Q2 |
| NATIONAL BANK OF CANADA /FI/ added | 909,546 | $581M | 0.3% | 2026-Q2 |
| Castle Hook Partners LP added | 903,374 | $577M | 0.3% | 2026-Q2 |
| Mitsubishi UFJ Asset Management Co., Ltd. added | 875,582 | $559M | 0.3% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN trimmed | 863,445 | $551M | 0.3% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP added | 863,206 | $551M | 0.3% | 2026-Q2 |
| Sumitomo Mitsui Trust Group, Inc. added | 855,124 | $546M | 0.3% | 2026-Q2 |
| AMF Tjanstepension AB trimmed | 850,847 | $543M | 0.3% | 2026-Q2 |
| BARCLAYS PLC trimmed | 832,598 | $532M | 0.3% | 2026-Q2 |
| Clear Street Group Inc. added | 817,892 | $522M | 0.3% | 2026-Q2 |
| Polar Capital Holdings Plc trimmed | 793,276 | $507M | 0.3% | 2026-Q2 |
| WT Asset Management Ltd trimmed | 784,212 | $501M | 0.3% | 2026-Q2 |
| BANK OF NOVA SCOTIA added | 783,212 | $500M | 0.3% | 2026-Q2 |
| California Public Employees Retirement System added | 767,793 | $490M | 0.3% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. trimmed | 748,606 | $478M | 0.3% | 2026-Q2 |
| Vanguard Global Advisers, LLC added | 746,976 | $477M | 0.3% | 2026-Q2 |
| FIRST TRUST ADVISORS LP added | 738,165 | $471M | 0.3% | 2026-Q2 |
| FRANKLIN RESOURCES INC added | 715,283 | $457M | 0.2% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 685,237 | $438M | 0.2% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 663,387 | $424M | 0.2% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 657,878 | $420M | 0.2% | 2026-Q2 |
| Jericho Capital Asset Management L.P. added | 644,764 | $412M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 633,209 | $404M | 0.2% | 2026-Q2 |
| Robeco Institutional Asset Management B.V. trimmed | 630,680 | $403M | 0.2% | 2026-Q2 |
| NEUBERGER BERMAN GROUP LLC added | 621,485 | $397M | 0.2% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 537,473 | $343M | 0.2% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 529,792 | $338M | 0.2% | 2026-Q2 |
| PRIMECAP MANAGEMENT CO/CA/ trimmed | 516,440 | $330M | 0.2% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 515,710 | $329M | 0.2% | 2026-Q2 |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main trimmed | 491,970 | $314M | 0.2% | 2026-Q2 |
| LPL Financial LLC added | 482,293 | $308M | 0.2% | 2026-Q2 |
| NOMURA HOLDINGS INC added | 477,263 | $305M | 0.2% | 2026-Q2 |
| NORDEA INVESTMENT MANAGEMENT AB added | 455,363 | $295M | 0.2% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 440,889 | $282M | 0.2% | 2026-Q2 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. added | 434,683 | $278M | 0.2% | 2026-Q2 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 425,171 | $272M | 0.1% | 2026-Q2 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND added | 419,594 | $268M | 0.1% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 410,425 | $262M | 0.1% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC trimmed | 408,974 | $261M | 0.1% | 2026-Q2 |
| Whale Rock Capital Management LLC trimmed | 400,687 | $256M | 0.1% | 2026-Q2 |
| MARSHALL WACE, LLP trimmed | 400,306 | $256M | 0.1% | 2026-Q2 |
| ProShare Advisors LLC trimmed | 395,320 | $252M | 0.1% | 2026-Q2 |
| Universal- Beteiligungs- und Servicegesellschaft mbH trimmed | 393,954 | $250M | 0.1% | 2026-Q2 |
| ASSETMARK, INC added | 364,895 | $233M | 0.1% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 363,960 | $232M | 0.1% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC trimmed | 357,077 | $228M | 0.1% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT CO LTD trimmed | 356,832 | $228M | 0.1% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 351,962 | $225M | 0.1% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND added | 349,003 | $223M | 0.1% | 2026-Q2 |
| Russell Investments Group, Ltd. trimmed | 348,674 | $223M | 0.1% | 2026-Q2 |
| Pictet Asset Management Holding SA added | 348,441 | $223M | 0.1% | 2026-Q2 |
| Bahl & Gaynor LLC trimmed | 321,167 | $205M | 0.1% | 2026-Q2 |
| Amanah Holdings Trust | 315,000 | $201M | 0.1% | 2026-Q2 |
| AVIVA PLC added | 308,519 | $197M | 0.1% | 2026-Q2 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. added | 307,437 | $196M | 0.1% | 2026-Q2 |
| BOUSSARD & GAVAUDAN GESTION SAS new | 44,500 | $752M | 0.4% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.