Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
1,589 institutional managers reported holding MAR for the quarter ended Mar 31, 2026. Together they hold about 58% of shares outstanding; the top 10 hold 30%. 178 opened new positions; 126 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 20.53M | 7.69% | $6.71B | trimmed -0.9% | ≤2013 |
| BlackRock | 15.50M | 5.81% | $5.07B | trimmed -1.3% | ≤2013 |
| State Street | 9.37M | 3.51% | $3.06B | trimmed -0.8% | ≤2013 |
| FMR (Fidelity) | 7.08M | 2.65% | $2.31B | added +5.3% | ≤2013 |
| Wellington Management | 5.85M | 2.19% | $1.91B | trimmed -31.8% | 2022 Q1 |
| Geode Capital | 5.31M | 1.99% | $1.74B | added +1.4% | ≤2013 |
| Morgan Stanley | 4.70M | 1.76% | $1.54B | trimmed -2% | ≤2013 |
| Invesco | 4.27M | 1.60% | $1.40B | trimmed -3.8% | ≤2013 |
| MFS Investment Management | 4.27M | 1.60% | $1.40B | trimmed -9.9% | 2014 Q1 |
| Fundsmith (focused) | 3.37M | 1.26% | $1.10B | trimmed -15.3% | 2023 Q1 |
| Capital International Investors | 3.08M | 1.15% | $1.01B | trimmed -25.1% | 2023 Q2 |
| UBS | 2.47M | 0.93% | $806.7M | trimmed -8.8% | ≤2013 |
| Goldman Sachs | 2.40M | 0.90% | $783.4M | added +22.4% | ≤2013 |
| Northern Trust | 2.17M | 0.81% | $709.9M | trimmed -1.5% | ≤2013 |
| Bank OF America CORP /DE/ | 1.89M | 0.71% | $617.4M | trimmed -8.8% | ≤2013 |
| Citadel Advisors | 1.75M | 0.66% | $572.6M | added +3.1% | ≤2013 |
| T. Rowe Price | 1.67M | 0.63% | $545.2M | trimmed -11.3% | ≤2013 |
| Charles Schwab Investment Management | 1.65M | 0.62% | $540.7M | added +2% | ≤2013 |
| Parnassus Investments | 1.59M | 0.59% | $519.3M | added +1.7% | 2023 Q3 |
| BNY Mellon | 1.42M | 0.53% | $465.1M | trimmed -3.4% | ≤2013 |
| Deutsche Bank AG\ | 1.30M | 0.49% | $424.6M | added +11.8% | 2013 Q3 |
| Legal & General Group PLC | 1.27M | 0.48% | $415.4M | trimmed -10.7% | ≤2013 |
| Fundsmith Investment Services LTD. (focused) | 1.20M | 0.45% | $392.1M | trimmed -9% | 2023 Q1 |
| Marshall Wace | 1.03M | 0.39% | $338.2M | added +2183.5% | 2024 Q1 |
| Barclays PLC | 949.4k | 0.36% | $310.5M | added +42.1% | ≤2013 |
| Fayez Sarofim & CO | 859.8k | 0.32% | $281.1M | trimmed -9.3% | 2021 Q1 |
| Hsbc Holdings PLC | 809.4k | 0.30% | $264.7M | added +26.4% | ≤2013 |
| DZ Bank AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 782.8k | 0.29% | $256.0M | added +70.4% | 2025 Q4 |
| First Manhattan CO. LLC. | 770.4k | 0.29% | $251.9M | trimmed -17.2% | ≤2013 |
| Dimensional Fund Advisors | 727.5k | 0.27% | $237.9M | added +0.8% | ≤2013 |
| Swiss National Bank | 669.4k | 0.25% | $218.9M | added +5.9% | ≤2013 |
| Ensign Peak Advisors, INC | 660.4k | 0.25% | $215.9M | trimmed -23% | 2019 Q4 |
| Arrowstreet Capital | 650.7k | 0.24% | $212.8M | trimmed -34.8% | 2021 Q3 |
| Amundi | 627.7k | 0.23% | $205.3M | trimmed -22.6% | ≤2013 |
| Mitsubishi UFJ Asset Management CO., LTD. | 625.2k | 0.23% | $204.4M | added +4.1% | ≤2013 |
| National Pension Service | 613.2k | 0.23% | $200.5M | added +1.4% | 2014 Q3 |
| Nuveen | 605.1k | 0.23% | $197.9M | trimmed -6.2% | ≤2013 |
| Royal Bank OF Canada | 591.0k | 0.22% | $193.3M | trimmed -5.9% | ≤2013 |
| Wells Fargo & COMPANY/MN | 585.6k | 0.22% | $191.5M | added +6.5% | ≤2013 |
| Voya Investment Management LLC | 552.8k | 0.21% | $180.8M | added +23.2% | ≤2013 |
| Raymond James Financial INC | 551.1k | 0.21% | $180.2M | trimmed -3.2% | ≤2013 |
| Harbor Investment Advisory, LLC | 533.9k | 0.20% | $174.6M | trimmed -5.7% | 2019 Q4 |
| Sumitomo Mitsui Trust Group, INC. | 523.6k | 0.20% | $171.2M | trimmed -5.7% | ≤2013 |
| Neuberger Berman Group LLC | 522.5k | 0.20% | $170.9M | added +6.7% | ≤2013 |
| CalPERS | 508.9k | 0.19% | $166.4M | trimmed -6.8% | ≤2013 |
| Diamant Asset Management, INC. | 490.6k | 0.18% | $160.4M | added +32607% | 2024 Q3 |
| AllianceBernstein | 474.0k | 0.18% | $155.0M | trimmed -29.6% | ≤2013 |
| Pictet Asset Management Holding SA | 457.1k | 0.17% | $149.5M | trimmed -11.2% | ≤2013 |
| Susquehanna International Group | 454.0k | 0.17% | $148.5M | added +42.3% | 2019 Q2 |
| BNP Paribas Financial Markets | 440.7k | 0.17% | $144.1M | trimmed -47.3% | ≤2013 |
Largest 50 of 1,589 shown; the full ranked, searchable register is at boothcheck.com/holders/MAR. 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.