Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
477 institutional managers reported holding MTDR for the quarter ended Mar 31, 2026. Together they hold about 94% of shares outstanding; the top 10 hold 46%. 114 opened new positions; 70 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 14.49M | 11.74% | $915.3M | trimmed -2% | ≤2013 |
| BlackRock | 11.14M | 9.02% | $703.5M | added +3.1% | ≤2013 |
| Dimensional Fund Advisors | 6.95M | 5.63% | $438.8M | added +4.2% | 2017 Q2 |
| State Street | 5.13M | 4.16% | $324.2M | added +11.2% | ≤2013 |
| Wellington Management | 4.00M | 3.24% | $252.4M | added +17.3% | 2022 Q3 |
| LSV Asset Management | 3.85M | 3.12% | $243.0M | unchanged | 2021 Q4 |
| T. Rowe Price Investment Management, INC. | 3.74M | 3.03% | $236.5M | added +177.8% | 2022 Q3 |
| Adage Capital Partners GP, L.l.c. | 3.04M | 2.46% | $191.8M | trimmed -9.8% | 2024 Q1 |
| AllianceBernstein | 2.66M | 2.15% | $167.8M | added +3% | ≤2013 |
| Geode Capital | 2.33M | 1.89% | $147.1M | added +4.1% | ≤2013 |
| American Century Companies INC | 2.22M | 1.79% | $139.9M | added +22.1% | 2019 Q4 |
| Morgan Stanley | 2.17M | 1.76% | $137.1M | trimmed -7.7% | ≤2013 |
| First Trust Advisors LP | 1.60M | 1.29% | $100.8M | added +103.3% | 2014 Q3 |
| Gw&k Investment Management, LLC | 1.56M | 1.26% | $98.4M | trimmed -0.8% | 2013 Q4 |
| AQR Capital | 1.54M | 1.25% | $97.3M | added +37.8% | 2021 Q1 |
| Silvercrest Asset Management Group LLC | 1.40M | 1.13% | $88.4M | trimmed -7.9% | 2014 Q2 |
| Cibc Bancorp USA INC. | 1.37M | 1.11% | $86.3M | added +0.7% | 2024 Q1 |
| Nomura Asset Management International INC. | 1.36M | 1.10% | $85.9M | added +35.2% | 2024 Q2 |
| Beck Mack & Oliver LLC | 1.36M | 1.10% | $85.8M | trimmed -5.2% | ≤2013 |
| Copeland Capital Management, LLC | 1.30M | 1.06% | $82.4M | trimmed -8.6% | 2023 Q1 |
| Charles Schwab Investment Management | 1.28M | 1.03% | $80.6M | added +4.3% | ≤2013 |
| Invesco | 1.27M | 1.02% | $79.9M | added +112.8% | ≤2013 |
| Driehaus Capital Management LLC | 1.19M | 0.96% | $75.1M | opened | 2026 Q1 |
| BNY Mellon | 1.19M | 0.96% | $74.9M | added +2.3% | ≤2013 |
| Thrivent Financial for Lutherans | 1.16M | 0.94% | $73.2M | added +9.9% | 2017 Q2 |
| Victory Capital Management INC | 1.04M | 0.84% | $65.7M | trimmed -13.3% | 2018 Q4 |
| Northern Trust | 1.02M | 0.82% | $64.3M | added +2.5% | ≤2013 |
| Vaughan Nelson Investment Management, L.p. | 1.01M | 0.82% | $64.0M | trimmed -7.5% | 2023 Q3 |
| MFS Investment Management | 1.01M | 0.82% | $64.0M | trimmed -20.3% | 2022 Q4 |
| Clearbridge Investments, LLC | 1.01M | 0.81% | $63.6M | trimmed -43.4% | 2019 Q3 |
| Franklin Resources | 997.3k | 0.81% | $63.0M | added +19% | 2021 Q2 |
| Nuveen | 934.7k | 0.76% | $59.0M | trimmed -0.5% | 2018 Q2 |
| Sagefield Capital LP | 887.1k | 0.72% | $56.0M | trimmed -20.6% | 2021 Q4 |
| Value Holdings Management CO. LLC (focused) | 834.3k | 0.68% | $52.7M | added +8.6% | 2016 Q4 |
| Fisher Investments | 830.3k | 0.67% | $52.4M | added +20.1% | 2023 Q3 |
| Frontier Capital Management CO LLC | 823.3k | 0.67% | $52.0M | added +8.4% | 2023 Q2 |
| Bank OF America CORP /DE/ | 808.5k | 0.66% | $51.1M | trimmed -31.3% | ≤2013 |
| UBS | 793.2k | 0.64% | $50.1M | trimmed -5.1% | ≤2013 |
| Champlain Investment Partners, LLC | 744.8k | 0.60% | $47.0M | opened | 2026 Q1 |
| Boston Trust Walden CORP | 699.7k | 0.57% | $44.2M | trimmed -6.5% | 2024 Q3 |
| T. Rowe Price | 679.3k | 0.55% | $42.9M | added +52.9% | ≤2013 |
| William Blair Investment Management, LLC | 622.9k | 0.50% | $39.3M | added +49.6% | 2023 Q3 |
| Hodges Capital Management INC. | 607.3k | 0.49% | $38.4M | added +11.2% | ≤2013 |
| Fearnley Asset Management AS (focused) | 514.7k | 0.42% | $32.5M | opened | 2026 Q1 |
| Arrowstreet Capital | 489.1k | 0.40% | $30.9M | opened | 2025 Q2 |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 462.5k | 0.38% | $29.2M | added +98.3% | 2024 Q4 |
| Allspring Global Investments Holdings, LLC | 460.1k | 0.37% | $29.1M | added +637.7% | 2021 Q4 |
| Goehring & Rozencwajg Associates, LLC (focused) | 457.9k | 0.37% | $28.9M | added +33.1% | 2022 Q4 |
| Bessemer Group INC | 435.4k | 0.35% | $27.5M | added +11.4% | 2022 Q2 |
| Royal Bank OF Canada | 410.3k | 0.33% | $25.9M | trimmed -9.7% | ≤2013 |
Largest 50 of 477 shown; the full ranked, searchable register is at boothcheck.com/holders/MTDR. 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.