Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
181 institutional managers reported holding NN for the quarter ended Mar 31, 2026. Together they hold about 58% of shares outstanding; the top 10 hold 41%. 30 opened new positions; 30 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Fortress Investment Group LLC (focused) | 14.18M | 9.35% | $226.9M | unchanged | 2021 Q4 |
| Clutterbuck Capital Management LLC (focused) | 9.30M | 6.13% | $148.9M | added +61.4% | 2025 Q4 |
| BlackRock | 7.48M | 4.93% | $119.7M | added +3.2% | 2021 Q4 |
| Wolf Hill Capital Management, LP (focused) | 7.04M | 4.64% | $112.7M | added +36.7% | 2024 Q1 |
| Vanguard Group | 6.98M | 4.60% | $111.7M | added +0.7% | 2021 Q4 |
| Susquehanna International Group | 6.62M | 4.37% | $105.9M | trimmed -18.2% | 2022 Q1 |
| UBS | 2.83M | 1.86% | $45.2M | added +28.9% | 2021 Q4 |
| Milfam LLC (focused) | 2.52M | 1.66% | $40.3M | opened | 2026 Q1 |
| Geode Capital | 2.34M | 1.54% | $37.5M | added +3.3% | 2021 Q4 |
| State Street | 2.23M | 1.47% | $35.8M | added +2.9% | 2022 Q1 |
| Ancora Advisors LLC | 2.17M | 1.43% | $34.7M | added +11.5% | 2023 Q3 |
| VAN ECK Associates CORP | 1.93M | 1.27% | $30.8M | added +39.6% | 2024 Q1 |
| Plustick Management LLC (focused) | 1.71M | 1.13% | $27.3M | trimmed -17.3% | 2022 Q3 |
| Empyrean Capital Partners, LP | 1.43M | 0.94% | $22.9M | trimmed -24.1% | 2024 Q1 |
| Millennium Management | 1.34M | 0.88% | $21.4M | added +143.9% | 2023 Q4 |
| Jane Street | 1.08M | 0.71% | $17.2M | added +30.3% | 2023 Q2 |
| Group ONE Trading LLC | 1.03M | 0.68% | $16.5M | trimmed -51.8% | 2023 Q3 |
| Northern Trust | 794.0k | 0.52% | $12.7M | added +2.9% | 2021 Q4 |
| Ingalls & Snyder LLC | 757.3k | 0.50% | $12.1M | added +58.9% | 2024 Q1 |
| Charles Schwab Investment Management | 745.0k | 0.49% | $11.9M | trimmed -1.4% | 2021 Q4 |
| Goldman Sachs | 627.1k | 0.41% | $10.0M | trimmed -28.5% | 2021 Q4 |
| General American Investors CO INC | 620.2k | 0.41% | $9.9M | trimmed -22.5% | 2023 Q1 |
| Barclays PLC | 568.0k | 0.38% | $9.1M | added +42.7% | 2022 Q1 |
| Philosophy Capital Management LLC (focused) | 550.0k | 0.36% | $8.8M | trimmed -37.4% | 2025 Q3 |
| Sona Asset Management (US) LLC | 521.5k | 0.34% | $8.3M | added +37.9% | 2024 Q3 |
| Citadel Advisors | 508.5k | 0.34% | $8.1M | trimmed -57% | 2023 Q3 |
| Walleye Capital LLC | 460.1k | 0.30% | $7.4M | trimmed -24.8% | 2024 Q3 |
| Point72 | 455.9k | 0.30% | $7.3M | added +43.6% | 2025 Q2 |
| Interval Partners, LP | 434.9k | 0.29% | $7.0M | trimmed -35.4% | 2025 Q1 |
| Prentice Capital Management, LP (focused) | 427.8k | 0.28% | $6.8M | trimmed -15.7% | 2023 Q4 |
| Morgan Stanley | 372.3k | 0.25% | $6.0M | unchanged | 2021 Q4 |
| Greenhaven Road Investment Management, L.p. (focused) | 349.3k | 0.23% | $5.6M | added +463.4% | 2025 Q1 |
| Commonwealth Equity Services, LLC | 323.2k | 0.21% | $5.2M | trimmed -15.8% | 2024 Q3 |
| LPL Financial LLC | 312.5k | 0.21% | $5.0M | trimmed -18.9% | 2023 Q3 |
| Qube Research & Technologies LTD | 302.0k | 0.20% | $4.8M | opened | 2025 Q3 |
| First Trust Advisors LP | 296.4k | 0.20% | $4.7M | added +3.8% | 2025 Q2 |
| Nuveen | 276.8k | 0.18% | $4.4M | added +1.3% | 2022 Q2 |
| Bank OF America CORP /DE/ | 260.0k | 0.17% | $4.2M | added +1.2% | 2021 Q4 |
| BNY Mellon | 254.5k | 0.17% | $4.1M | trimmed -2.1% | 2022 Q3 |
| Steward Partners Investment Advisory, LLC | 242.1k | 0.16% | $3.9M | unchanged | 2024 Q3 |
| IMC-Chicago, LLC | 204.8k | 0.14% | $3.3M | trimmed -27.6% | 2024 Q4 |
| Sender CO & Partners, INC. (focused) | 202.6k | 0.13% | $3.2M | added +134.9% | 2025 Q2 |
| Tudor Investment | 192.9k | 0.13% | $3.1M | added +93.1% | 2025 Q1 |
| Cambridge Investment Research Advisors, INC. | 147.3k | 0.10% | $2.4M | added +40.2% | 2024 Q2 |
| Swiss National Bank | 146.1k | 0.10% | $2.3M | unchanged | 2023 Q4 |
| Quinn Opportunity Partners LLC | 145.7k | 0.10% | $2.3M | added +70% | 2025 Q1 |
| Wittenberg Investment Management, INC. | 128.3k | 0.09% | $2.1M | added +6% | 2024 Q3 |
| Boston Family Office LLC | 125.0k | 0.08% | $2.0M | unchanged | 2023 Q3 |
| Numerai GP LLC | 124.1k | 0.08% | $2.0M | opened | 2024 Q4 |
| Cannell & Spears LLC | 122.9k | 0.08% | $2.0M | added +0.7% | 2024 Q3 |
Largest 50 of 181 shown; the full ranked, searchable register is at boothcheck.com/holders/NN. 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.