Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
348 institutional managers reported holding NMIH for the quarter ended Mar 31, 2026. Together they hold about 94% of shares outstanding; the top 10 hold 50%. 34 opened new positions; 39 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 12.86M | 16.61% | $482.6M | trimmed -1.9% | 2013 Q4 |
| Vanguard Group | 7.09M | 9.15% | $265.9M | trimmed -0.6% | 2014 Q1 |
| Dimensional Fund Advisors | 4.35M | 5.62% | $163.3M | added +0.8% | 2015 Q2 |
| State Street | 3.30M | 4.27% | $123.9M | added +2.1% | 2014 Q2 |
| American Century Companies INC | 2.72M | 3.51% | $102.1M | added +8.2% | 2016 Q2 |
| Geode Capital | 2.01M | 2.60% | $75.6M | added +1.6% | 2013 Q4 |
| Van Berkom & Associates INC. | 1.99M | 2.57% | $74.7M | trimmed -1.3% | 2021 Q2 |
| Nomura Asset Management International INC. | 1.67M | 2.15% | $62.6M | trimmed -7.8% | 2025 Q4 |
| Bank OF America CORP /DE/ | 1.30M | 1.69% | $48.9M | added +22.7% | 2013 Q4 |
| Goldman Sachs | 1.24M | 1.60% | $46.4M | added +28.6% | 2013 Q4 |
| FMR (Fidelity) | 1.16M | 1.50% | $43.5M | added +34.9% | 2016 Q2 |
| Capital International Investors | 1.15M | 1.49% | $43.1M | opened | 2026 Q1 |
| Fuller & Thaler Asset Management, INC. | 1.07M | 1.38% | $40.2M | opened | 2026 Q1 |
| Frontier Capital Management CO LLC | 1.02M | 1.31% | $38.1M | trimmed -4.1% | 2020 Q3 |
| Morgan Stanley | 998.9k | 1.29% | $37.5M | trimmed -10.8% | 2013 Q4 |
| Nuveen | 986.4k | 1.27% | $37.0M | trimmed -12.8% | 2019 Q2 |
| Charles Schwab Investment Management | 985.7k | 1.27% | $37.0M | added +0.6% | 2014 Q2 |
| Northern Trust | 835.6k | 1.08% | $31.4M | added +3.1% | 2014 Q1 |
| Allianz Asset Management GmbH | 783.6k | 1.01% | $29.4M | added +3.1% | 2022 Q4 |
| Barclays PLC | 731.0k | 0.94% | $27.4M | trimmed -26.1% | 2014 Q2 |
| Assenagon Asset Management S.a. | 726.6k | 0.94% | $27.3M | trimmed -27.9% | 2018 Q4 |
| AQR Capital | 718.3k | 0.93% | $27.0M | trimmed -2.1% | 2021 Q2 |
| Qube Research & Technologies LTD | 708.9k | 0.92% | $26.6M | added +11.7% | 2022 Q1 |
| Ameriprise Financial INC | 705.5k | 0.91% | $26.5M | added +18.3% | 2017 Q3 |
| Clearbridge Investments, LLC | 705.0k | 0.91% | $26.5M | trimmed -9% | 2021 Q1 |
| Public Sector Pension Investment Board | 680.4k | 0.88% | $25.5M | added +18.2% | 2017 Q4 |
| Two Sigma | 633.9k | 0.82% | $23.8M | added +43.5% | 2024 Q1 |
| Panagora Asset Management INC | 594.0k | 0.77% | $22.3M | unchanged | 2022 Q4 |
| Millennium Management | 578.5k | 0.75% | $21.7M | added +2.4% | 2013 Q4 |
| D. E. Shaw | 551.1k | 0.71% | $20.7M | trimmed -29.5% | 2023 Q2 |
| Walleye Capital LLC | 506.8k | 0.66% | $19.0M | trimmed -7.3% | 2025 Q2 |
| BNY Mellon | 498.2k | 0.64% | $18.7M | trimmed -4.2% | 2014 Q2 |
| Arrowstreet Capital | 475.3k | 0.61% | $17.8M | unchanged | 2023 Q2 |
| Principal Financial Group INC | 474.3k | 0.61% | $17.8M | trimmed -1.2% | 2017 Q2 |
| Invesco | 404.9k | 0.52% | $15.2M | trimmed -4.1% | 2016 Q1 |
| Donald Smith & CO., INC. | 397.6k | 0.51% | $14.9M | added +6% | 2024 Q2 |
| Winmill & CO. INC | 396.1k | 0.51% | $14.9M | unchanged | 2022 Q4 |
| Deutsche Bank AG\ | 370.0k | 0.48% | $13.9M | trimmed -2.8% | 2014 Q2 |
| River Road Asset Management, LLC | 370.0k | 0.48% | $13.9M | unchanged | 2025 Q4 |
| Tudor Investment | 366.9k | 0.47% | $13.8M | added +5.8% | 2021 Q3 |
| Muhlenkamp & CO INC (focused) | 366.2k | 0.47% | $13.7M | trimmed -21.7% | 2020 Q2 |
| Aberdeen Group plc | 361.5k | 0.47% | $13.6M | added +2.4% | 2024 Q4 |
| UBS | 341.5k | 0.44% | $12.8M | added +11.8% | 2014 Q4 |
| Healthcare OF Ontario Pension Plan Trust Fund | 338.4k | 0.44% | $12.7M | added +16.5% | 2024 Q2 |
| Hotchkis & Wiley Capital Management LLC | 337.3k | 0.44% | $12.7M | trimmed -2.5% | 2021 Q3 |
| Captrust Financial Advisors | 315.9k | 0.41% | $11.9M | trimmed -6.6% | 2024 Q4 |
| Franklin Resources | 301.9k | 0.39% | $11.3M | added +203% | 2021 Q3 |
| Cerity Partners LLC | 296.2k | 0.38% | $11.1M | added +9.8% | 2023 Q3 |
| First Eagle Investment Management | 273.6k | 0.35% | $10.3M | unchanged | 2021 Q2 |
| PRIMECAP Management | 268.3k | 0.35% | $10.1M | trimmed -4.1% | 2017 Q4 |
Largest 50 of 348 shown; the full ranked, searchable register is at boothcheck.com/holders/NMIH. 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.