Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
473 institutional managers reported holding MPT for the quarter ended Mar 31, 2026. Together they hold about 58% of shares outstanding; the top 10 hold 39%. 64 opened new positions; 66 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 75.30M | 12.60% | $349.4M | trimmed -0.7% | ≤2013 |
| Vanguard Group | 68.19M | 11.41% | $316.4M | added +0.7% | ≤2013 |
| State Street | 25.56M | 4.28% | $118.6M | trimmed -2.6% | ≤2013 |
| Charles Schwab Investment Management | 11.98M | 2.00% | $55.6M | trimmed -0.5% | ≤2013 |
| AQR Capital | 11.06M | 1.85% | $51.3M | trimmed -17.6% | ≤2013 |
| Geode Capital | 9.98M | 1.67% | $46.3M | added +2.8% | ≤2013 |
| Two Sigma | 8.40M | 1.41% | $39.0M | added +117.3% | 2024 Q1 |
| Dimensional Fund Advisors | 7.44M | 1.24% | $34.5M | added +1.2% | ≤2013 |
| Wilsey Asset Management INC (focused) | 7.35M | 1.23% | $34.1M | added +25.5% | 2020 Q2 |
| Morgan Stanley | 6.73M | 1.13% | $31.2M | trimmed -43.7% | ≤2013 |
| Jupiter Asset Management LTD | 6.69M | 1.12% | $31.0M | opened | 2026 Q1 |
| Allianz Asset Management GmbH | 6.49M | 1.08% | $30.1M | trimmed -5.4% | 2015 Q3 |
| Advisors Capital Management, LLC | 6.38M | 1.07% | $29.6M | opened | 2026 Q1 |
| BNY Mellon | 6.31M | 1.06% | $29.3M | trimmed -4.2% | ≤2013 |
| Deutsche Bank AG\ | 5.61M | 0.94% | $26.0M | trimmed -2% | 2013 Q3 |
| Northern Trust | 5.22M | 0.87% | $24.2M | added +2.9% | ≤2013 |
| Coatue Management | 4.53M | 0.76% | $21.0M | unchanged | 2023 Q3 |
| Legal & General Group PLC | 3.38M | 0.56% | $15.7M | trimmed -6.5% | ≤2013 |
| UBS | 2.72M | 0.46% | $12.6M | trimmed -51% | ≤2013 |
| Principal Financial Group INC | 2.39M | 0.40% | $11.1M | added +2% | ≤2013 |
| Susquehanna International Group | 1.94M | 0.33% | $9.0M | trimmed -54% | 2019 Q3 |
| Goldman Sachs | 1.91M | 0.32% | $8.9M | added +224.4% | ≤2013 |
| Invesco | 1.78M | 0.30% | $8.3M | added +5.7% | ≤2013 |
| Public Sector Pension Investment Board | 1.76M | 0.29% | $8.2M | added +3.3% | 2024 Q1 |
| SG Americas Securities, LLC | 1.52M | 0.26% | $7.1M | added +44.2% | ≤2013 |
| Bank OF America CORP /DE/ | 1.43M | 0.24% | $6.6M | trimmed -7% | ≤2013 |
| Canada Life Assurance CO | 1.32M | 0.22% | $6.1M | trimmed -1.4% | 2013 Q4 |
| APG Asset Management N.v. | 1.23M | 0.21% | $5.7M | opened | 2026 Q1 |
| Citadel Advisors | 1.16M | 0.19% | $5.4M | added +472.2% | ≤2013 |
| Ameriprise Financial INC | 1.10M | 0.18% | $5.1M | trimmed -1.3% | ≤2013 |
| Citigroup INC | 1.09M | 0.18% | $5.1M | added +82.3% | ≤2013 |
| Swiss National Bank | 1.01M | 0.17% | $4.7M | unchanged | ≤2013 |
| Tudor Investment | 983.8k | 0.17% | $4.6M | trimmed -45.5% | 2024 Q3 |
| Quantinno Capital Management LP | 964.5k | 0.16% | $4.5M | added +114.2% | 2022 Q4 |
| Rhumbline Advisers | 955.1k | 0.16% | $4.4M | opened | ≤2013 |
| Hsbc Holdings PLC | 953.2k | 0.16% | $4.4M | added +4% | 2015 Q2 |
| IEQ Capital, LLC | 874.3k | 0.15% | $4.1M | trimmed -23.1% | 2023 Q4 |
| Nuveen | 845.4k | 0.14% | $3.9M | added +20.6% | ≤2013 |
| Thrivent Financial for Lutherans | 771.2k | 0.13% | $3.6M | added +72.8% | 2025 Q3 |
| Nomura Asset Management CO LTD | 769.7k | 0.13% | $3.6M | added +1.3% | ≤2013 |
| Public Employees Retirement System OF Ohio | 720.4k | 0.12% | $3.3M | trimmed -13% | 2014 Q2 |
| Mitsubishi UFJ Asset Management CO., LTD. | 688.2k | 0.12% | $3.2M | added +8.1% | ≤2013 |
| Asset Management One CO., LTD. | 677.3k | 0.11% | $3.1M | trimmed -1.3% | ≤2013 |
| Cambridge Investment Research Advisors, INC. | 610.2k | 0.10% | $2.8M | added +1.1% | ≤2013 |
| California State Teachers Retirement System | 598.6k | 0.10% | $2.8M | added +24.2% | ≤2013 |
| Corient Private Wealth LLC | 577.7k | 0.10% | $2.7M | added +338% | 2022 Q4 |
| State Board OF Administration OF Florida Retirement System | 570.8k | 0.10% | $2.6M | unchanged | ≤2013 |
| Balyasny Asset Management | 556.4k | 0.09% | $2.6M | added +321.3% | 2020 Q3 |
| Sumitomo Mitsui Trust Group, INC. | 548.0k | 0.09% | $2.5M | added +2.4% | ≤2013 |
| Simplex Trading, LLC | 547.2k | 0.09% | $2.5M | trimmed -4.1% | 2025 Q3 |
Largest 50 of 473 shown; the full ranked, searchable register is at boothcheck.com/holders/MPT. 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.