Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
294 institutional managers reported holding MT for the quarter ended Mar 31, 2026. Together they hold about 4% of shares outstanding; the top 10 hold 2%. 54 opened new positions; 40 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Dimensional Fund Advisors | 3.23M | 0.42% | $168.0M | unchanged | ≤2013 |
| Morgan Stanley | 2.01M | 0.26% | $104.3M | added +16.8% | ≤2013 |
| FMR (Fidelity) | 1.56M | 0.20% | $81.0M | added +13.1% | ≤2013 |
| BlackRock | 1.43M | 0.19% | $74.3M | trimmed -23.9% | 2020 Q3 |
| Maple Rock Capital Partners INC. (focused) | 1.41M | 0.18% | $73.5M | trimmed -13.3% | 2025 Q3 |
| Goldman Sachs | 1.32M | 0.17% | $68.8M | added +1.9% | ≤2013 |
| BNY Mellon | 1.10M | 0.14% | $57.4M | trimmed -25.4% | ≤2013 |
| Bank OF Montreal /CAN/ | 919.5k | 0.12% | $47.8M | added +558.3% | 2023 Q2 |
| Connor, Clark & Lunn Investment Management LTD. | 890.5k | 0.12% | $46.3M | added +0.7% | 2023 Q1 |
| American Century Companies INC | 746.9k | 0.10% | $38.8M | added +37.8% | 2020 Q1 |
| Retirement Systems of Alabama | 674.1k | 0.09% | $35.0M | unchanged | 2025 Q4 |
| Bank OF America CORP /DE/ | 670.6k | 0.09% | $34.9M | trimmed -20.3% | ≤2013 |
| Northern Trust | 618.1k | 0.08% | $32.1M | trimmed -19.9% | ≤2013 |
| Jane Street | 608.6k | 0.08% | $31.6M | added +13432.8% | 2014 Q1 |
| Man Group | 578.2k | 0.08% | $30.1M | added +154.7% | 2025 Q3 |
| VAN ECK Associates CORP | 569.8k | 0.07% | $29.6M | trimmed -10.8% | ≤2013 |
| Royal Bank OF Canada | 441.1k | 0.06% | $22.9M | trimmed -46.5% | ≤2013 |
| Citadel Advisors | 396.9k | 0.05% | $20.6M | trimmed -25.9% | ≤2013 |
| D. E. Shaw | 373.3k | 0.05% | $19.4M | added +39.6% | 2025 Q3 |
| Senator Investment Group LP | 341.3k | 0.04% | $17.7M | trimmed -41.2% | 2025 Q4 |
| UBS | 337.2k | 0.04% | $17.5M | added +51.6% | ≤2013 |
| Qube Research & Technologies LTD | 336.4k | 0.04% | $17.5M | opened | 2025 Q1 |
| Quantinno Capital Management LP | 335.9k | 0.04% | $17.5M | added +11.7% | 2022 Q4 |
| BNP Paribas Financial Markets | 288.8k | 0.04% | $15.0M | added +3626.8% | 2021 Q2 |
| HRT Financial LP | 287.2k | 0.04% | $14.9M | added +99.7% | 2024 Q3 |
| AQR Capital | 276.4k | 0.04% | $14.4M | added +17.3% | 2024 Q2 |
| Causeway Capital Management LLC | 265.7k | 0.04% | $13.8M | trimmed -31% | 2024 Q2 |
| Millennium Management | 247.2k | 0.03% | $12.8M | added +76% | ≤2013 |
| Robotti Robert | 236.6k | 0.03% | $12.3M | trimmed -30.2% | 2024 Q1 |
| JB Capital Partners LP | 205.0k | 0.03% | $10.7M | unchanged | 2024 Q1 |
| Cerity Partners LLC | 203.8k | 0.03% | $10.6M | trimmed -25.8% | 2022 Q3 |
| Capital Wealth Planning, LLC | 199.9k | 0.03% | $10.4M | trimmed -15.2% | 2025 Q3 |
| Carrhae Capital LLP (focused) | 196.7k | 0.03% | $10.2M | opened | 2026 Q1 |
| Albar Capital Partners LLP (focused) | 177.8k | 0.02% | $9.2M | added +11% | 2025 Q4 |
| BW Gestao de Investimentos Ltda. | 171.1k | 0.02% | $8.9M | trimmed -14.4% | 2025 Q4 |
| Wellington Management | 159.8k | 0.02% | $8.3M | trimmed -28.5% | ≤2013 |
| Creative Planning | 155.0k | 0.02% | $8.1M | added +31.3% | 2020 Q3 |
| Neuberger Berman Group LLC | 148.4k | 0.02% | $7.7M | trimmed -41.5% | 2022 Q2 |
| Amanah Holdings Trust (focused) | 148.0k | 0.02% | $7.7M | unchanged | 2025 Q4 |
| Envestnet Asset Management INC | 145.2k | 0.02% | $7.5M | trimmed -9% | 2016 Q4 |
| SEI Investments CO | 130.8k | 0.02% | $6.8M | trimmed -18.6% | 2019 Q4 |
| Charles Schwab Investment Management | 127.7k | 0.02% | $6.6M | added +12.3% | 2023 Q2 |
| PointState Capital LP (focused) | 125.1k | 0.02% | $6.5M | opened | 2026 Q1 |
| XTX Topco LTD | 112.8k | 0.01% | $5.9M | added +219.9% | 2025 Q2 |
| Impala Asset Management LLC (focused) | 110.9k | 0.01% | $5.8M | trimmed -30.2% | 2025 Q4 |
| Carrera Capital Advisors | 107.7k | 0.01% | $5.6M | added +5% | 2025 Q4 |
| Mmcap International INC. SPC | 105.9k | 0.01% | $5.5M | added +15.8% | 2025 Q4 |
| QRG Capital Management, INC. | 97.5k | 0.01% | $5.1M | trimmed -2% | 2023 Q3 |
| Peak6 LLC | 95.9k | 0.01% | $5.0M | opened | 2026 Q1 |
| Mercer Global Advisors INC /ADV | 91.0k | 0.01% | $4.7M | added +1.7% | 2019 Q1 |
Largest 50 of 294 shown; the full ranked, searchable register is at boothcheck.com/holders/MT. 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.