Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
896 institutional managers reported holding WRB for the quarter ended Mar 31, 2026. Together they hold about 70% of shares outstanding; the top 10 hold 44%. 88 opened new positions; 124 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Mitsui Sumitomo Insurance CO LTD (focused) | 58.78M | 14.89% | $3.90B | added +16.3% | 2025 Q4 |
| Vanguard Group | 36.55M | 9.26% | $2.42B | trimmed -1.4% | ≤2013 |
| BlackRock | 23.28M | 5.90% | $1.54B | trimmed -7.1% | ≤2013 |
| State Street | 14.41M | 3.65% | $954.8M | trimmed -3.4% | 2015 Q4 |
| Morgan Stanley | 10.41M | 2.64% | $690.1M | added +6.3% | ≤2013 |
| Geode Capital | 8.23M | 2.08% | $545.5M | trimmed -1.4% | ≤2013 |
| Kayne Anderson Rudnick Investment Management LLC | 7.77M | 1.97% | $515.1M | trimmed -10.8% | 2015 Q2 |
| UBS | 5.44M | 1.38% | $360.8M | trimmed -4.9% | ≤2013 |
| Invesco | 5.05M | 1.28% | $334.8M | added +2.8% | ≤2013 |
| First Trust Advisors LP | 3.97M | 1.01% | $263.3M | added +10.5% | ≤2013 |
| Wells Fargo & COMPANY/MN | 3.79M | 0.96% | $251.2M | trimmed -5% | ≤2013 |
| Dimensional Fund Advisors | 3.77M | 0.95% | $249.8M | added +3.6% | ≤2013 |
| Bank OF America CORP /DE/ | 2.90M | 0.74% | $192.5M | added +23.4% | ≤2013 |
| Goldman Sachs | 2.85M | 0.72% | $189.0M | added +3.5% | ≤2013 |
| Northern Trust | 2.71M | 0.69% | $179.3M | trimmed -6.3% | ≤2013 |
| Janus Henderson | 2.46M | 0.62% | $162.9M | trimmed -30.9% | ≤2013 |
| 1832 Asset Management L.p. | 2.29M | 0.58% | $152.0M | trimmed -1.3% | 2017 Q3 |
| Royal London Asset Management LTD | 2.28M | 0.58% | $151.4M | trimmed -18.1% | 2018 Q2 |
| Polar Capital Holdings PLC | 2.27M | 0.58% | $150.8M | trimmed -7% | ≤2013 |
| BNY Mellon | 2.03M | 0.52% | $134.8M | trimmed -7.6% | ≤2013 |
| Principal Financial Group INC | 1.93M | 0.49% | $127.6M | trimmed -29.1% | ≤2013 |
| Charles Schwab Investment Management | 1.90M | 0.48% | $126.0M | added +1.3% | ≤2013 |
| Legal & General Group PLC | 1.87M | 0.47% | $124.0M | trimmed -9.2% | ≤2013 |
| AQR Capital | 1.85M | 0.47% | $122.5M | added +6.9% | ≤2013 |
| Madison Asset Management, LLC | 1.62M | 0.41% | $107.3M | trimmed -6.1% | ≤2013 |
| Citadel Advisors | 1.39M | 0.35% | $92.4M | added +1142% | ≤2013 |
| FMR (Fidelity) | 1.39M | 0.35% | $92.1M | added +9.4% | ≤2013 |
| Chilton Investment CO INC. | 1.39M | 0.35% | $92.0M | trimmed -15.2% | 2022 Q3 |
| Natixis Advisors, LLC | 1.35M | 0.34% | $89.4M | added +10.6% | 2017 Q3 |
| Royal Bank OF Canada | 1.30M | 0.33% | $86.0M | trimmed -17.2% | ≤2013 |
| Eulav Asset Management | 1.23M | 0.31% | $81.6M | trimmed -5% | 2018 Q4 |
| Barclays PLC | 1.23M | 0.31% | $81.3M | added +17.4% | ≤2013 |
| Jones Financial Companies Lllp | 1.15M | 0.29% | $76.0M | added +15193.3% | 2023 Q4 |
| Deutsche Bank AG\ | 1.14M | 0.29% | $75.9M | added +32% | ≤2013 |
| Anchor Capital Advisors LLC | 1.13M | 0.29% | $75.2M | added +0.7% | 2020 Q1 |
| Confluence Investment Management LLC | 1.11M | 0.28% | $73.8M | trimmed -5.8% | 2013 Q3 |
| Hsbc Holdings PLC | 1.10M | 0.28% | $73.1M | trimmed -36.4% | ≤2013 |
| Raymond James Financial INC | 1.10M | 0.28% | $72.9M | trimmed -7.7% | ≤2013 |
| Cornerstone Investment Partners, LLC | 1.05M | 0.27% | $69.8M | trimmed -4.3% | 2023 Q3 |
| Jane Street | 1.01M | 0.26% | $67.2M | added +5849.1% | 2020 Q1 |
| Envestnet Asset Management INC | 896.2k | 0.23% | $59.4M | trimmed -2.3% | 2013 Q3 |
| Mitsubishi UFJ Asset Management CO., LTD. | 841.4k | 0.21% | $55.8M | trimmed -4.3% | ≤2013 |
| Parnassus Investments | 806.1k | 0.20% | $53.4M | added +1.6% | 2024 Q1 |
| Arrowstreet Capital | 803.1k | 0.20% | $53.2M | trimmed -22.7% | 2022 Q2 |
| PFA Pension, Forsikringsaktieselskab | 791.3k | 0.20% | $52.4M | trimmed -14.1% | 2025 Q4 |
| Cerity Partners LLC | 775.4k | 0.20% | $51.4M | added +3.7% | 2022 Q2 |
| BNP Paribas Financial Markets | 774.3k | 0.20% | $51.3M | trimmed -27% | ≤2013 |
| Swiss National Bank | 725.0k | 0.18% | $48.1M | trimmed -12.8% | ≤2013 |
| Amundi | 721.0k | 0.18% | $47.8M | trimmed -10.3% | 2017 Q4 |
| Citigroup INC | 707.1k | 0.18% | $46.9M | added +31.8% | ≤2013 |
Largest 50 of 896 shown; the full ranked, searchable register is at boothcheck.com/holders/WRB. 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.