Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
470 institutional managers reported holding MRP for the quarter ended Mar 31, 2026. Together they hold about 81% of shares outstanding; the top 10 hold 49%. 65 opened new positions; 75 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 23.02M | 13.86% | $644.4M | added +8.8% | 2025 Q1 |
| BlackRock | 20.61M | 12.42% | $577.2M | added +3.3% | 2025 Q1 |
| Brave Warrior Advisors, LLC (focused) | 8.52M | 5.13% | $238.4M | trimmed -1% | 2025 Q1 |
| FMR (Fidelity) | 6.53M | 3.93% | $182.8M | added +60.2% | 2025 Q1 |
| State Street | 5.28M | 3.18% | $147.8M | added +3.9% | 2025 Q1 |
| Manufacturers Life Insurance Company, THE | 4.30M | 2.59% | $120.5M | trimmed -3.8% | 2025 Q1 |
| Permian Investment Partners, LP (focused) | 3.88M | 2.34% | $108.6M | added +2.2% | 2025 Q1 |
| Cannell & Spears LLC | 3.68M | 2.21% | $103.0M | added +1.4% | 2025 Q1 |
| Geode Capital | 3.01M | 1.81% | $84.2M | added +3.3% | 2025 Q1 |
| Two Sigma | 3.00M | 1.81% | $84.0M | added +60.8% | 2025 Q3 |
| Morgan Stanley | 2.63M | 1.58% | $73.6M | trimmed -6.6% | 2025 Q1 |
| Charles Schwab Investment Management | 2.29M | 1.38% | $64.1M | added +3.8% | 2025 Q1 |
| Citadel Advisors | 2.09M | 1.26% | $58.5M | trimmed -44.4% | 2025 Q1 |
| Capital Group (American Funds) | 1.64M | 0.99% | $46.0M | unchanged | 2025 Q1 |
| Invesco | 1.62M | 0.98% | $45.4M | added +104.8% | 2025 Q1 |
| Gotham Asset Management | 1.56M | 0.94% | $43.8M | added +104.5% | 2025 Q1 |
| Nuveen | 1.55M | 0.94% | $43.5M | added +80.2% | 2025 Q1 |
| Mangrove Partners IM, LLC | 1.38M | 0.83% | $38.7M | unchanged | 2025 Q1 |
| Jupiter Asset Management LTD | 1.33M | 0.80% | $37.2M | opened | 2026 Q1 |
| BNY Mellon | 1.28M | 0.77% | $35.7M | trimmed -0.6% | 2025 Q1 |
| Pacer Advisors, INC. | 1.23M | 0.74% | $34.4M | opened | 2026 Q1 |
| LOS Angeles Capital Management LLC | 1.11M | 0.67% | $31.0M | opened | 2025 Q1 |
| Northern Trust | 1.10M | 0.67% | $30.9M | trimmed -7% | 2025 Q1 |
| Principal Financial Group INC | 1.04M | 0.63% | $29.2M | trimmed -45.9% | 2025 Q1 |
| Qube Research & Technologies LTD | 944.3k | 0.57% | $26.4M | opened | 2025 Q1 |
| UBS | 891.2k | 0.54% | $25.0M | added +26% | 2025 Q1 |
| AQR Capital | 891.0k | 0.54% | $24.9M | added +31% | 2025 Q1 |
| Callodine Capital Management, LP | 762.4k | 0.46% | $21.3M | added +110.8% | 2025 Q4 |
| Pacific Heights Asset Management LLC | 750.0k | 0.45% | $21.0M | added +7.1% | 2025 Q1 |
| Thrivent Financial for Lutherans | 724.0k | 0.44% | $20.3M | unchanged | 2025 Q3 |
| Russell Investments Group, LTD. | 706.2k | 0.42% | $19.8M | trimmed -10.9% | 2025 Q1 |
| Renaissance Technologies | 687.1k | 0.41% | $19.2M | trimmed -4.4% | 2025 Q2 |
| Hawk Ridge Capital Management LP (focused) | 669.1k | 0.40% | $18.7M | added +1.7% | 2025 Q1 |
| Moore Capital | 658.7k | 0.40% | $18.4M | trimmed -35.3% | 2025 Q1 |
| Public Sector Pension Investment Board | 650.4k | 0.39% | $18.2M | added +2.5% | 2025 Q1 |
| American Century Companies INC | 637.1k | 0.38% | $17.8M | trimmed -16.3% | 2025 Q1 |
| Holocene Advisors | 617.8k | 0.37% | $17.3M | opened | 2026 Q1 |
| Millennium Management | 582.9k | 0.35% | $16.3M | trimmed -55.1% | 2025 Q1 |
| Bank OF America CORP /DE/ | 556.0k | 0.34% | $15.6M | trimmed -23.6% | 2025 Q1 |
| GAMCO (Gabelli) | 515.9k | 0.31% | $14.4M | added +1.6% | 2025 Q1 |
| Goldman Sachs | 481.0k | 0.29% | $13.5M | trimmed -28.2% | 2025 Q1 |
| Raymond James Financial INC | 469.2k | 0.28% | $13.1M | added +0.8% | 2025 Q1 |
| Adelante Capital Management LLC (focused) | 444.0k | 0.27% | $12.4M | added +101.3% | 2025 Q4 |
| Verition Fund Management | 415.9k | 0.25% | $11.6M | trimmed -18.3% | 2025 Q1 |
| Jacobs Levy Equity Management, INC | 412.7k | 0.25% | $11.6M | trimmed -42.5% | 2025 Q1 |
| Ancora Advisors LLC | 410.2k | 0.25% | $11.5M | added +19.4% | 2025 Q1 |
| Rhumbline Advisers | 375.7k | 0.23% | $10.5M | added +4.5% | 2025 Q1 |
| Man Group | 372.1k | 0.22% | $10.4M | added +247% | 2025 Q2 |
| Gamco Investors, INC. et al | 357.2k | 0.21% | $10.0M | added +2% | 2025 Q1 |
| SEI Investments CO | 347.2k | 0.21% | $9.7M | added +225.1% | 2025 Q1 |
Largest 50 of 470 shown; the full ranked, searchable register is at boothcheck.com/holders/MRP. 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.