Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
1,847 institutional managers reported holding MPC for the quarter ended Mar 31, 2026. Together they hold about 73% of shares outstanding; the top 10 hold 41%. 335 opened new positions; 139 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 37.98M | 12.88% | $9.27B | trimmed -1% | ≤2013 |
| BlackRock | 24.39M | 8.27% | $5.95B | added +8.8% | ≤2013 |
| State Street | 19.03M | 6.45% | $4.64B | added +6.1% | ≤2013 |
| Geode Capital | 7.82M | 2.65% | $1.91B | added +0.7% | ≤2013 |
| Morgan Stanley | 6.07M | 2.06% | $1.48B | unchanged | ≤2013 |
| Raymond James Financial INC | 5.77M | 1.96% | $1.41B | trimmed -0.7% | ≤2013 |
| Boston Partners | 5.65M | 1.92% | $1.38B | trimmed -7.7% | ≤2013 |
| Wellington Management | 5.64M | 1.91% | $1.38B | trimmed -21.7% | ≤2013 |
| FMR (Fidelity) | 4.91M | 1.67% | $1.20B | added +41.4% | ≤2013 |
| BNY Mellon | 3.95M | 1.34% | $964.8M | trimmed -10.4% | ≤2013 |
| Northern Trust | 3.18M | 1.08% | $775.3M | trimmed -3.4% | ≤2013 |
| Dimensional Fund Advisors | 3.09M | 1.05% | $753.6M | trimmed -7.8% | ≤2013 |
| UBS | 2.97M | 1.01% | $724.1M | added +15.9% | ≤2013 |
| Invesco | 2.83M | 0.96% | $690.3M | added +8.8% | ≤2013 |
| Harris Associates (Oakmark) | 2.81M | 0.95% | $684.8M | trimmed -30.4% | 2025 Q1 |
| Goldman Sachs | 2.75M | 0.93% | $672.3M | added +17.8% | ≤2013 |
| Charles Schwab Investment Management | 2.73M | 0.93% | $666.1M | trimmed -3.2% | ≤2013 |
| Bank OF America CORP /DE/ | 2.60M | 0.88% | $633.3M | added +1.6% | ≤2013 |
| Ameriprise Financial INC | 2.22M | 0.75% | $542.8M | trimmed -1.1% | ≤2013 |
| Amundi | 1.91M | 0.65% | $465.0M | added +2.6% | 2017 Q4 |
| Allianz Asset Management GmbH | 1.71M | 0.58% | $416.5M | added +10% | ≤2013 |
| Legal & General Group PLC | 1.66M | 0.56% | $405.4M | trimmed -3.1% | ≤2013 |
| Capital Wealth Planning, LLC | 1.64M | 0.56% | $400.5M | added +9.6% | 2021 Q4 |
| US Bancorp \DE\ | 1.55M | 0.53% | $377.9M | trimmed -3.6% | ≤2013 |
| Principal Financial Group INC | 1.53M | 0.52% | $373.3M | trimmed -8.1% | ≤2013 |
| Two Sigma | 1.52M | 0.52% | $372.0M | added +71.7% | 2024 Q4 |
| T. Rowe Price | 1.28M | 0.43% | $313.1M | trimmed -37.7% | ≤2013 |
| LSV Asset Management | 1.28M | 0.43% | $312.8M | trimmed -3.6% | ≤2013 |
| CPP Investment Board | 1.12M | 0.38% | $273.7M | trimmed -12.6% | ≤2013 |
| Deutsche Bank AG\ | 1.12M | 0.38% | $273.1M | added +9.3% | 2013 Q3 |
| Nuveen | 984.7k | 0.33% | $240.3M | added +22.8% | ≤2013 |
| National Pension Service | 922.9k | 0.31% | $225.2M | added +4.2% | 2014 Q3 |
| Lord, Abbett & CO. LLC | 917.7k | 0.31% | $224.0M | added +62.5% | ≤2013 |
| Mitsubishi UFJ Asset Management CO., LTD. | 907.3k | 0.31% | $221.4M | trimmed -1.1% | ≤2013 |
| Swiss National Bank | 882.2k | 0.30% | $215.3M | added +5.9% | ≤2013 |
| Royal Bank OF Canada | 858.2k | 0.29% | $209.4M | trimmed -2.9% | ≤2013 |
| Barclays PLC | 847.7k | 0.29% | $206.9M | added +26.2% | ≤2013 |
| Wells Fargo & COMPANY/MN | 822.9k | 0.28% | $200.8M | added +10.7% | ≤2013 |
| BNP Paribas Financial Markets | 688.5k | 0.23% | $168.0M | trimmed -18.1% | ≤2013 |
| Ghe, LLC | 649.5k | 0.22% | $158.5M | added +1939.8% | 2021 Q4 |
| Voya Investment Management LLC | 648.6k | 0.22% | $158.3M | trimmed -1.5% | ≤2013 |
| Sumitomo Mitsui Trust Group, INC. | 643.8k | 0.22% | $157.1M | trimmed -6.2% | ≤2013 |
| Jones Financial Companies Lllp | 621.8k | 0.21% | $151.7M | added +66.8% | 2019 Q2 |
| Rhumbline Advisers | 618.8k | 0.21% | $151.0M | trimmed -4.6% | ≤2013 |
| Fifth Third Bancorp | 608.4k | 0.21% | $148.5M | added +12.6% | ≤2013 |
| Mariner, LLC | 553.6k | 0.19% | $135.1M | unchanged | 2018 Q1 |
| Panagora Asset Management INC | 551.9k | 0.19% | $134.7M | added +289.7% | ≤2013 |
| Citigroup INC | 538.6k | 0.18% | $131.4M | added +23.1% | ≤2013 |
| CalPERS | 536.8k | 0.18% | $131.0M | trimmed -8.3% | ≤2013 |
| Acadian Asset Management | 530.6k | 0.18% | $129.5M | added +140.6% | 2020 Q2 |
Largest 50 of 1,847 shown; the full ranked, searchable register is at boothcheck.com/holders/MPC. 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.