Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
921 institutional managers reported holding RIO for the quarter ended Mar 31, 2026. Together they hold about 8% of shares outstanding; the top 10 hold 4%. 152 opened new positions; 98 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Fisher Investments | 20.14M | 1.24% | $1.88B | added +2.5% | 2018 Q2 |
| State Farm Mutual Automobile Insurance CO | 10.93M | 0.67% | $1.02B | unchanged | ≤2013 |
| Goldman Sachs | 8.81M | 0.54% | $822.3M | trimmed -19.6% | ≤2013 |
| Morgan Stanley | 4.89M | 0.30% | $456.1M | trimmed -14.3% | ≤2013 |
| Mirae Asset Global Etfs Holdings LTD. | 4.24M | 0.26% | $395.3M | added +4.8% | 2024 Q1 |
| Arrowstreet Capital | 3.71M | 0.23% | $346.1M | trimmed -4.5% | 2025 Q3 |
| Bank OF America CORP /DE/ | 3.62M | 0.22% | $338.0M | added +6.6% | ≤2013 |
| Neuberger Berman Group LLC | 2.45M | 0.15% | $229.0M | added +10.4% | 2017 Q1 |
| Qube Research & Technologies LTD | 2.38M | 0.15% | $221.8M | unchanged | 2023 Q1 |
| FMR (Fidelity) | 2.18M | 0.13% | $203.4M | added +13.2% | 2017 Q4 |
| Pacer Advisors, INC. | 2.16M | 0.13% | $201.2M | added +161.6% | 2017 Q2 |
| BlackRock | 2.11M | 0.13% | $196.7M | added +18.9% | ≤2013 |
| Bank OF Montreal /CAN/ | 2.06M | 0.13% | $191.8M | trimmed -7.4% | ≤2013 |
| Grantham, Mayo, Van Otterloo & CO. LLC | 2.00M | 0.12% | $187.0M | added +27.8% | 2023 Q2 |
| Harding Loevner LP | 1.97M | 0.12% | $183.9M | trimmed -4% | 2019 Q2 |
| Northern Trust | 1.84M | 0.11% | $171.6M | added +7.9% | ≤2013 |
| Natixis Advisors, LLC | 1.75M | 0.11% | $163.2M | added +10.2% | ≤2013 |
| Jones Financial Companies Lllp | 1.73M | 0.11% | $161.0M | added +3566% | 2021 Q1 |
| Dimensional Fund Advisors | 1.68M | 0.10% | $157.0M | trimmed -5.5% | ≤2013 |
| Citigroup INC | 1.54M | 0.10% | $144.1M | added +3.3% | ≤2013 |
| Earnest Partners LLC | 1.44M | 0.09% | $134.6M | trimmed -4.8% | 2013 Q4 |
| BNP Paribas Financial Markets | 1.44M | 0.09% | $134.1M | trimmed -20.2% | ≤2013 |
| UBS | 1.34M | 0.08% | $124.6M | added +19% | ≤2013 |
| Wells Fargo & COMPANY/MN | 1.30M | 0.08% | $121.5M | trimmed -2.7% | ≤2013 |
| Royal Bank OF Canada | 1.20M | 0.07% | $111.9M | trimmed -7.5% | ≤2013 |
| Altshuler Shaham LTD | 1.14M | 0.07% | $106.7M | opened | 2026 Q1 |
| Palliser Capital (UK) LTD (focused) | 1.04M | 0.06% | $96.8M | trimmed -14.1% | 2023 Q1 |
| Jane Street | 1.00M | 0.06% | $93.6M | opened | 2015 Q2 |
| Renaissance Technologies | 965.8k | 0.06% | $90.1M | added +417.6% | 2018 Q3 |
| Clearbridge Investments, LLC | 892.5k | 0.06% | $83.3M | opened | 2026 Q1 |
| Todd Asset Management LLC | 874.7k | 0.05% | $81.6M | trimmed -19.4% | 2017 Q1 |
| Raymond James Financial INC | 871.7k | 0.05% | $81.3M | added +15.1% | ≤2013 |
| Envestnet Asset Management INC | 838.4k | 0.05% | $78.2M | added +54.7% | ≤2013 |
| Franklin Resources | 784.2k | 0.05% | $73.2M | trimmed -43.8% | ≤2013 |
| Milford Funds LTD | 671.3k | 0.04% | $62.6M | trimmed -42.3% | 2025 Q4 |
| Cullen Capital Management, LLC | 656.9k | 0.04% | $61.3M | added +31.7% | 2020 Q3 |
| Deutsche Bank AG\ | 641.2k | 0.04% | $59.8M | trimmed -71.1% | 2024 Q3 |
| 1832 Asset Management L.p. | 640.1k | 0.04% | $59.7M | added +2.4% | 2013 Q3 |
| Wellington Management | 624.6k | 0.04% | $58.3M | trimmed -29.6% | ≤2013 |
| American Century Companies INC | 595.5k | 0.04% | $55.6M | added +42.2% | 2019 Q4 |
| SEI Investments CO | 564.2k | 0.04% | $52.6M | added +1.1% | ≤2013 |
| Teachers Retirement System OF THE State OF Kentucky | 545.8k | 0.03% | $50.9M | trimmed -21.8% | 2017 Q2 |
| Capital Advisors INC/OK | 529.6k | 0.03% | $49.4M | added +0.8% | 2021 Q2 |
| Adage Capital Partners GP, L.l.c. | 524.6k | 0.03% | $48.9M | trimmed -22.2% | 2024 Q1 |
| First Trust Advisors LP | 520.0k | 0.03% | $48.5M | trimmed -7.8% | ≤2013 |
| LPL Financial LLC | 514.7k | 0.03% | $48.0M | added +11.7% | ≤2013 |
| Creative Planning | 505.4k | 0.03% | $47.2M | added +10.1% | ≤2013 |
| HRT Financial LP | 460.0k | 0.03% | $42.9M | added +208.7% | 2024 Q3 |
| Barclays PLC | 453.9k | 0.03% | $42.3M | added +2.7% | ≤2013 |
| Ameriprise Financial INC | 443.8k | 0.03% | $41.4M | trimmed -14.9% | ≤2013 |
Largest 50 of 921 shown; the full ranked, searchable register is at boothcheck.com/holders/RIO. 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.