Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
492 institutional managers reported holding MTG for the quarter ended Mar 31, 2026. Together they hold about 91% of shares outstanding; the top 10 hold 52%. 61 opened new positions; 89 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 29.51M | 13.53% | $775.0M | trimmed -1.1% | ≤2013 |
| BlackRock | 23.14M | 10.61% | $607.7M | unchanged | ≤2013 |
| Dimensional Fund Advisors | 13.65M | 6.26% | $358.6M | trimmed -1.3% | ≤2013 |
| AQR Capital | 10.99M | 5.04% | $288.5M | trimmed -5.4% | ≤2013 |
| LSV Asset Management | 9.90M | 4.54% | $259.9M | trimmed -1.2% | 2015 Q4 |
| State Street | 7.83M | 3.59% | $205.6M | trimmed -1.7% | ≤2013 |
| American Century Companies INC | 5.92M | 2.71% | $155.5M | added +30.3% | 2018 Q4 |
| Allianz Asset Management GmbH | 4.57M | 2.09% | $119.9M | trimmed -8.9% | 2017 Q2 |
| Geode Capital | 4.52M | 2.07% | $118.6M | trimmed -15.9% | ≤2013 |
| First Trust Advisors LP | 4.29M | 1.97% | $112.6M | trimmed -7% | 2016 Q2 |
| Northern Trust | 4.21M | 1.93% | $110.6M | unchanged | ≤2013 |
| Caisse de depot et placement du Quebec | 3.76M | 1.72% | $98.6M | added +3.8% | 2024 Q3 |
| Franklin Resources | 3.40M | 1.56% | $89.2M | added +41.4% | 2020 Q4 |
| Clearbridge Investments, LLC | 2.98M | 1.36% | $78.2M | trimmed -25.7% | 2016 Q3 |
| Goldman Sachs | 2.64M | 1.21% | $69.3M | added +3.2% | ≤2013 |
| Invesco | 2.62M | 1.20% | $68.9M | added +5.2% | ≤2013 |
| Morgan Stanley | 2.58M | 1.18% | $67.8M | added +19.4% | ≤2013 |
| NewEdge Wealth, LLC | 2.45M | 1.12% | $64.4M | added +12.3% | 2022 Q3 |
| Charles Schwab Investment Management | 2.35M | 1.07% | $61.6M | unchanged | ≤2013 |
| BNY Mellon | 1.94M | 0.89% | $50.9M | trimmed -4.1% | ≤2013 |
| Assetmark, INC | 1.93M | 0.88% | $50.6M | trimmed -5.5% | 2022 Q1 |
| UBS | 1.90M | 0.87% | $49.8M | trimmed -13% | ≤2013 |
| NFC Investments, LLC (focused) | 1.77M | 0.81% | $46.4M | trimmed -1.1% | 2016 Q2 |
| Quantinno Capital Management LP | 1.50M | 0.69% | $39.4M | trimmed -16.8% | 2023 Q1 |
| Robeco Institutional Asset Management B.v. | 1.44M | 0.66% | $37.7M | added +12.4% | 2019 Q2 |
| Bank OF America CORP /DE/ | 1.42M | 0.65% | $37.2M | added +15.4% | ≤2013 |
| Tudor Investment | 1.35M | 0.62% | $35.4M | added +21.2% | 2022 Q1 |
| FMR (Fidelity) | 1.25M | 0.57% | $32.8M | trimmed -13.1% | ≤2013 |
| Citadel Advisors | 1.25M | 0.57% | $32.7M | added +31.1% | ≤2013 |
| Brown Advisory INC | 1.24M | 0.57% | $32.6M | trimmed -5.6% | 2020 Q3 |
| Nuveen | 1.02M | 0.47% | $26.9M | added +37.3% | 2019 Q2 |
| Bragg Financial Advisors, INC | 1.02M | 0.47% | $26.9M | added +5.5% | 2021 Q1 |
| Barclays PLC | 1.02M | 0.47% | $26.7M | added +19.1% | ≤2013 |
| Arbejdsmarkedets Tillaegspension | 979.0k | 0.45% | $25.7M | added +17% | 2025 Q4 |
| Wealth Enhancement Advisory Services, LLC | 949.8k | 0.43% | $24.9M | trimmed -41.4% | 2023 Q3 |
| Squarepoint Ops LLC | 946.3k | 0.43% | $24.8M | added +133.5% | 2016 Q2 |
| Ameriprise Financial INC | 919.3k | 0.42% | $24.1M | added +1.1% | ≤2013 |
| D. E. Shaw | 890.4k | 0.41% | $23.4M | added +219.9% | ≤2013 |
| Jane Street | 812.4k | 0.37% | $21.3M | trimmed -53.3% | 2018 Q3 |
| Advisory Research INC | 794.3k | 0.36% | $20.9M | added +3.9% | 2022 Q1 |
| Rhumbline Advisers | 713.7k | 0.33% | $18.7M | trimmed -1% | ≤2013 |
| Man Group | 706.3k | 0.32% | $18.5M | added +17.4% | 2018 Q1 |
| Alps Advisors INC | 630.3k | 0.29% | $16.6M | trimmed -4.6% | 2023 Q3 |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 620.3k | 0.28% | $16.3M | trimmed -15.9% | 2024 Q4 |
| LOS Angeles Capital Management LLC | 611.4k | 0.28% | $16.1M | added +2213.1% | 2014 Q1 |
| Leeward Investments, LLC - MA | 565.5k | 0.26% | $14.9M | trimmed -2.3% | 2022 Q1 |
| SEI Investments CO | 519.2k | 0.24% | $13.6M | added +65.1% | ≤2013 |
| CalPERS | 509.5k | 0.23% | $13.4M | added +7% | ≤2013 |
| Principal Financial Group INC | 490.0k | 0.23% | $12.9M | added +1.8% | ≤2013 |
| Two Sigma | 480.6k | 0.22% | $12.6M | added +2652.5% | 2025 Q4 |
Largest 50 of 492 shown; the full ranked, searchable register is at boothcheck.com/holders/MTG. 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.