Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
62 institutional managers reported holding MNR for the quarter ended Mar 31, 2026. Together they hold about 17% of shares outstanding; the top 10 hold 16%. 13 opened new positions; 11 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Kayne Anderson Capital Advisors LP (focused) | 18.96M | 11.27% | $265.6M | trimmed -1.2% | 2025 Q3 |
| American Century Companies INC | 2.36M | 1.40% | $33.1M | trimmed -7.4% | 2023 Q4 |
| Morgan Stanley | 1.18M | 0.70% | $16.6M | added +10.8% | 2023 Q4 |
| Goldman Sachs | 1.05M | 0.62% | $14.7M | trimmed -45.6% | 2023 Q4 |
| ING Groep NV | 1.01M | 0.60% | $14.2M | trimmed -0.6% | 2024 Q4 |
| First Trust Advisors LP | 497.7k | 0.30% | $7.0M | trimmed -7.7% | 2025 Q2 |
| Raymond James Financial INC | 461.4k | 0.27% | $6.5M | added +26.2% | 2024 Q1 |
| Cibc Bancorp USA INC. | 425.6k | 0.25% | $6.0M | trimmed -20.4% | 2025 Q1 |
| &partners | 264.5k | 0.16% | $3.7M | trimmed -2.3% | 2025 Q3 |
| Chicago Partners Investment Group LLC | 247.3k | 0.15% | $3.5M | unchanged | 2023 Q4 |
| PIN OAK Investment Advisors INC | 240.1k | 0.14% | $3.4M | trimmed -0.6% | 2025 Q1 |
| LPL Financial LLC | 193.3k | 0.12% | $2.7M | opened | 2023 Q4 |
| Franklin Resources | 182.9k | 0.11% | $2.6M | trimmed -0.9% | 2023 Q4 |
| Invesco | 163.5k | 0.10% | $2.3M | trimmed -12.9% | 2023 Q4 |
| Stifel Financial CORP | 139.7k | 0.08% | $2.0M | trimmed -39.8% | 2023 Q4 |
| GSA Capital Partners LLP | 123.6k | 0.07% | $1.7M | added +180.2% | 2024 Q2 |
| Raffles Associates LP (focused) | 115.0k | 0.07% | $1.6M | unchanged | 2025 Q4 |
| Janney Montgomery Scott LLC | 112.6k | 0.07% | $1.6M | trimmed -4.6% | 2025 Q1 |
| Strategic Financial Concepts, LLC | 102.7k | 0.06% | $1.4M | opened | 2024 Q3 |
| LuminArx Capital Management LP (focused) | 96.8k | 0.06% | $1.4M | trimmed -69.7% | 2025 Q4 |
| HRT Financial LP | 93.8k | 0.06% | $1.3M | opened | 2024 Q1 |
| Jane Street | 86.9k | 0.05% | $1.2M | trimmed -42.9% | 2025 Q2 |
| Citadel Advisors | 66.7k | 0.04% | $935k | trimmed -23% | 2023 Q4 |
| Blair William & CO/IL | 62.4k | 0.04% | $875k | opened | 2026 Q1 |
| Bramshill Investments, LLC | 50.1k | 0.03% | $702k | opened | 2026 Q1 |
| Signature Estate & Investment Advisors LLC | 50.0k | 0.03% | $701k | opened | 2026 Q1 |
| Envestnet Asset Management INC | 50.0k | 0.03% | $701k | opened | 2026 Q1 |
| UBS | 47.4k | 0.03% | $665k | added +4639% | 2023 Q4 |
| Rockefeller Capital Management L.p. | 36.2k | 0.02% | $507k | added +31.2% | 2023 Q4 |
| Susquehanna International Group | 33.0k | 0.02% | $462k | added +39% | 2025 Q4 |
| Wedbush Securities INC | 28.3k | 0.02% | $396k | added +6.5% | 2025 Q2 |
| Novem Group | 22.0k | 0.01% | $308k | unchanged | 2024 Q4 |
| Tidal Investments LLC | 21.1k | 0.01% | $296k | trimmed -10.6% | 2025 Q3 |
| Stephens INC /AR/ | 20.3k | 0.01% | $285k | trimmed -15.3% | 2023 Q4 |
| Verdence Capital Advisors LLC | 17.0k | 0.01% | $238k | opened | 2026 Q1 |
| Corient Private Wealth LLC | 16.6k | 0.01% | $232k | opened | 2025 Q3 |
| Arrow Investment Advisors, LLC | 15.9k | <0.01% | $223k | added +35.2% | 2025 Q2 |
| Royal Bank OF Canada | 13.9k | <0.01% | $194k | added +42.8% | 2023 Q4 |
| Equitable Holdings, INC. | 12.0k | <0.01% | $168k | opened | 2026 Q1 |
| Bank OF America CORP /DE/ | 11.0k | <0.01% | $154k | trimmed -46% | 2023 Q4 |
| Wilmington Savings Fund Society, FSB | 10.0k | <0.01% | $140k | unchanged | 2025 Q4 |
| Osaic Holdings, INC. | 8.6k | <0.01% | $120k | added +94.4% | 2024 Q3 |
| EverSource Wealth Advisors, LLC | 5.2k | <0.01% | $73k | added +2513% | 2025 Q2 |
| Central Trust CO | 5.0k | <0.01% | $70k | added +384.7% | 2025 Q4 |
| Gunpowder Capital Management, LLC dba Oliver Wealth Management | 3.8k | <0.01% | $53k | unchanged | 2025 Q4 |
| Wells Fargo & COMPANY/MN | 3.5k | <0.01% | $49k | trimmed -42% | 2024 Q1 |
| Hilton Head Capital Partners, LLC | 3.0k | <0.01% | $41k | added +3.9% | 2025 Q4 |
| Parkside Financial Bank & Trust | 2.5k | <0.01% | $35k | unchanged | 2024 Q4 |
| Citigroup INC | 2.2k | <0.01% | $31k | added +44780% | 2023 Q4 |
| Barclays PLC | 2.2k | <0.01% | $30k | added +408.5% | 2024 Q4 |
Largest 50 of 62 shown; the full ranked, searchable register is at boothcheck.com/holders/MNR. 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.