Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
1,367 institutional managers reported holding WDC for the quarter ended Mar 31, 2026. Together they hold about 80% of shares outstanding; the top 10 hold 46%. 341 opened new positions; 122 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 42.68M | 11.03% | $11.55B | added +0.6% | ≤2013 |
| BlackRock | 35.77M | 9.24% | $9.68B | added +0.7% | ≤2013 |
| FMR (Fidelity) | 31.62M | 8.17% | $8.56B | trimmed -6.4% | ≤2013 |
| State Street | 15.47M | 4.00% | $4.19B | trimmed -1.5% | ≤2013 |
| Capital Group (American Funds) | 11.88M | 3.07% | $3.22B | added +1017% | 2025 Q4 |
| Geode Capital | 9.48M | 2.45% | $2.57B | added +2.1% | ≤2013 |
| Bank OF America CORP /DE/ | 8.49M | 2.19% | $2.30B | trimmed -29.5% | ≤2013 |
| Morgan Stanley | 7.94M | 2.05% | $2.15B | trimmed -11.2% | ≤2013 |
| UBS | 7.09M | 1.83% | $1.92B | trimmed -3.7% | ≤2013 |
| WCM Investment Management | 6.56M | 1.70% | $1.78B | trimmed -1.9% | 2025 Q3 |
| Ameriprise Financial INC | 5.76M | 1.49% | $1.56B | trimmed -32.4% | ≤2013 |
| Invesco | 5.53M | 1.43% | $1.50B | added +1.4% | ≤2013 |
| Goldman Sachs | 5.41M | 1.40% | $1.46B | added +18.6% | ≤2013 |
| Northern Trust | 3.61M | 0.93% | $976.2M | trimmed -1.8% | ≤2013 |
| AQR Capital | 3.46M | 0.89% | $936.4M | added +16.4% | 2019 Q4 |
| Capital Research Global Investors | 3.31M | 0.85% | $895.8M | opened | 2026 Q1 |
| Amundi | 3.06M | 0.79% | $827.9M | added +27.5% | 2016 Q3 |
| Nuveen | 2.96M | 0.77% | $801.0M | trimmed -35.2% | ≤2013 |
| D. E. Shaw | 2.69M | 0.69% | $727.6M | trimmed -52.8% | ≤2013 |
| Fred Alger Management, LLC | 2.66M | 0.69% | $719.9M | trimmed -0.9% | 2025 Q2 |
| T. Rowe Price | 2.65M | 0.68% | $716.3M | added +1.3% | ≤2013 |
| BNY Mellon | 2.51M | 0.65% | $679.0M | added +21% | ≤2013 |
| Dimensional Fund Advisors | 2.50M | 0.65% | $677.6M | trimmed -29.8% | ≤2013 |
| Charles Schwab Investment Management | 2.21M | 0.57% | $597.4M | trimmed -2.6% | ≤2013 |
| Legal & General Group PLC | 2.13M | 0.55% | $576.3M | added +4.7% | ≤2013 |
| Deutsche Bank AG\ | 1.87M | 0.48% | $506.9M | trimmed -16.1% | ≤2013 |
| BNP Paribas Financial Markets | 1.58M | 0.41% | $426.5M | trimmed -2.3% | ≤2013 |
| Hsbc Holdings PLC | 1.55M | 0.40% | $418.2M | added +21.9% | ≤2013 |
| National Pension Service | 1.44M | 0.37% | $389.2M | trimmed -15% | 2014 Q3 |
| Bank OF Montreal /CAN/ | 1.41M | 0.36% | $380.3M | added +36.3% | ≤2013 |
| Maple Rock Capital Partners INC. (focused) | 1.40M | 0.36% | $379.1M | trimmed -41.2% | 2019 Q1 |
| AMF Tjanstepension AB | 1.37M | 0.35% | $371.9M | trimmed -22.3% | 2024 Q4 |
| Value Aligned Research Advisors, LLC | 1.30M | 0.34% | $350.6M | opened | 2026 Q1 |
| Royal Bank OF Canada | 1.27M | 0.33% | $344.0M | trimmed -35.9% | ≤2013 |
| Soroban Capital Partners LP (focused) | 1.15M | 0.30% | $310.3M | unchanged | 2025 Q1 |
| Renaissance Technologies | 1.15M | 0.30% | $310.2M | added +15.5% | 2023 Q4 |
| Barclays PLC | 1.05M | 0.27% | $284.2M | trimmed -31.2% | ≤2013 |
| Wells Fargo & COMPANY/MN | 1.02M | 0.27% | $277.3M | added +18.3% | ≤2013 |
| Swiss National Bank | 1.00M | 0.26% | $271.6M | added +5.5% | ≤2013 |
| Robeco Institutional Asset Management B.v. | 984.7k | 0.25% | $266.5M | trimmed -28.5% | ≤2013 |
| Polar Capital Holdings PLC | 972.4k | 0.25% | $263.2M | added +6.5% | 2025 Q3 |
| Mitsubishi UFJ Asset Management CO., LTD. | 961.8k | 0.25% | $260.3M | added +6.4% | ≤2013 |
| Marshall Wace | 931.3k | 0.24% | $252.1M | added +475.4% | 2019 Q1 |
| Nomura Asset Management International INC. | 927.6k | 0.24% | $251.1M | trimmed -30.7% | 2024 Q4 |
| Castle Hook Partners LP (focused) | 878.9k | 0.23% | $237.9M | trimmed -33.7% | 2025 Q2 |
| Sumitomo Mitsui Trust Group, INC. | 836.7k | 0.22% | $226.5M | trimmed -5.7% | ≤2013 |
| DZ Bank AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 827.7k | 0.21% | $224.0M | added +99.1% | 2023 Q1 |
| Voya Investment Management LLC | 817.6k | 0.21% | $221.3M | added +121.8% | ≤2013 |
| WT Asset Management LTD (focused) | 816.7k | 0.21% | $221.1M | added +98.5% | 2025 Q3 |
| AllianceBernstein | 763.1k | 0.20% | $206.5M | trimmed -53.2% | ≤2013 |
Largest 50 of 1,367 shown; the full ranked, searchable register is at boothcheck.com/holders/WDC. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.