Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
211 institutional managers reported holding NNI for the quarter ended Mar 31, 2026. Together they hold about 32% of shares outstanding; the top 10 hold 24%. 27 opened new positions; 32 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Dimensional Fund Advisors | 1.85M | 5.12% | $237.8M | unchanged | ≤2013 |
| Magnolia Group, LLC (focused) | 1.67M | 4.63% | $214.8M | unchanged | 2017 Q3 |
| Vanguard Group | 1.37M | 3.79% | $175.9M | added +3.7% | ≤2013 |
| Farmers & Merchants Investments INC | 1.18M | 3.28% | $152.4M | unchanged | ≤2013 |
| BlackRock | 978.0k | 2.71% | $125.9M | added +5.7% | ≤2013 |
| Geode Capital | 346.7k | 0.96% | $44.6M | added +10.1% | ≤2013 |
| American Century Companies INC | 335.7k | 0.93% | $43.2M | added +27% | 2019 Q4 |
| State Street | 315.0k | 0.87% | $40.5M | added +5.6% | ≤2013 |
| General American Investors CO INC | 234.0k | 0.65% | $30.1M | trimmed -3.9% | ≤2013 |
| QVT Financial LP | 231.4k | 0.64% | $29.8M | added +0.8% | 2021 Q3 |
| Empyrean Capital Partners, LP | 231.0k | 0.64% | $29.7M | unchanged | 2025 Q3 |
| Bragg Financial Advisors, INC | 226.8k | 0.63% | $29.2M | added +6.7% | 2025 Q2 |
| Northern Trust | 173.4k | 0.48% | $22.3M | added +7.8% | ≤2013 |
| Charles Schwab Investment Management | 162.1k | 0.45% | $20.9M | added +4.7% | ≤2013 |
| UBS | 109.8k | 0.30% | $14.1M | trimmed -31.2% | ≤2013 |
| Qube Research & Technologies LTD | 108.8k | 0.30% | $14.0M | added +41.6% | 2022 Q1 |
| BAR Harbor Wealth Management | 108.7k | 0.30% | $14.0M | trimmed -1.4% | 2022 Q2 |
| Sycale Advisors (NY) LLC (focused) | 100.5k | 0.28% | $12.9M | trimmed -34.1% | 2019 Q4 |
| BNY Mellon | 81.4k | 0.23% | $10.5M | added +8.3% | ≤2013 |
| Morgan Stanley | 77.2k | 0.21% | $9.9M | added +15.6% | ≤2013 |
| Jane Street | 69.6k | 0.19% | $9.0M | unchanged | 2023 Q3 |
| AQR Capital | 67.4k | 0.19% | $8.7M | added +175.6% | ≤2013 |
| Lawson Kroeker Investment Management INC/NE | 66.5k | 0.18% | $8.6M | unchanged | 2024 Q1 |
| Guardian Wealth Management, INC. | 51.4k | 0.14% | $6.6M | added +4.3% | 2021 Q4 |
| Edgestream Partners, L.p. | 50.7k | 0.14% | $6.5M | added +47.9% | 2024 Q3 |
| Susquehanna International Group | 50.0k | 0.14% | $6.4M | added +29.7% | 2019 Q3 |
| Goldman Sachs | 48.9k | 0.14% | $6.3M | added +8.3% | ≤2013 |
| Renaissance Technologies | 48.0k | 0.13% | $6.2M | added +58.9% | 2023 Q1 |
| Bandera Partners LLC (focused) | 47.2k | 0.13% | $6.1M | trimmed -53.9% | 2023 Q2 |
| Crawford Fund Management, LLC (focused) | 47.0k | 0.13% | $6.0M | added +1.9% | 2023 Q4 |
| Marshall Wace | 41.7k | 0.12% | $5.4M | added +51.8% | 2023 Q4 |
| Denali Advisors LLC | 41.2k | 0.11% | $5.3M | trimmed -7.6% | ≤2013 |
| Franklin Resources | 38.0k | 0.10% | $4.9M | opened | 2026 Q1 |
| LPL Financial LLC | 37.6k | 0.10% | $4.8M | added +15.2% | 2020 Q3 |
| HighTower Advisors, LLC | 34.1k | 0.09% | $4.4M | trimmed -2.2% | 2019 Q3 |
| Nuveen | 28.3k | 0.08% | $3.6M | added +8.8% | 2019 Q2 |
| Swiss National Bank | 27.7k | 0.08% | $3.6M | unchanged | ≤2013 |
| Citadel Advisors | 26.2k | 0.07% | $3.4M | trimmed -15.5% | 2019 Q2 |
| First Trust Advisors LP | 24.3k | 0.07% | $3.1M | added +41.4% | 2016 Q2 |
| D.a. Davidson & CO. | 24.0k | 0.07% | $3.1M | unchanged | 2017 Q1 |
| Invesco | 23.1k | 0.06% | $3.0M | added +18.1% | ≤2013 |
| Rhumbline Advisers | 23.0k | 0.06% | $3.0M | added +0.6% | ≤2013 |
| Mercer Global Advisors INC /ADV | 21.3k | 0.06% | $2.7M | added +1247.8% | 2025 Q4 |
| James Investment Research, INC. | 20.8k | 0.06% | $2.7M | unchanged | ≤2013 |
| D. E. Shaw | 20.4k | 0.06% | $2.6M | trimmed -69.1% | ≤2013 |
| HUB Investment Partners, LLC | 20.3k | 0.06% | $2.6M | opened | 2026 Q1 |
| Man Group | 19.2k | 0.05% | $2.5M | opened | 2025 Q3 |
| Martingale Asset Management L P | 18.7k | 0.05% | $2.4M | trimmed -4.5% | 2025 Q1 |
| Millennium Management | 18.3k | 0.05% | $2.4M | trimmed -27.5% | 2024 Q4 |
| Prescott Group Capital Management, L.l.c. | 17.2k | 0.05% | $2.2M | unchanged | 2024 Q1 |
Largest 50 of 211 shown; the full ranked, searchable register is at boothcheck.com/holders/NNI. 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.