Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
166 institutional managers reported holding OMAB for the quarter ended Mar 31, 2026. Together they hold about 1% of shares outstanding; the top 10 hold 1%. 29 opened new positions; 18 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 1.39M | 0.36% | $160.0M | added +14.9% | ≤2013 |
| Nuveen | 538.4k | 0.14% | $62.0M | added +343.4% | 2013 Q3 |
| State Street | 387.8k | 0.10% | $44.6M | added +17.6% | 2016 Q2 |
| Morgan Stanley | 299.0k | 0.08% | $34.4M | trimmed -6.2% | ≤2013 |
| Russell Investments Group, LTD. | 195.6k | 0.05% | $22.5M | added +152.8% | 2016 Q4 |
| American Century Companies INC | 184.2k | 0.05% | $21.2M | added +21.3% | 2022 Q2 |
| Empowered Funds, LLC | 168.4k | 0.04% | $19.4M | added +68.1% | 2025 Q2 |
| Empirical Finance, LLC | 168.3k | 0.04% | $19.4M | added +74.6% | 2025 Q1 |
| Renaissance Technologies | 156.2k | 0.04% | $18.0M | trimmed -3.1% | ≤2013 |
| CPP Investment Board | 149.4k | 0.04% | $17.2M | unchanged | 2024 Q2 |
| Fisher Funds Management LTD | 148.6k | 0.04% | $17.1M | added +19.8% | 2024 Q4 |
| 1832 Asset Management L.p. | 147.6k | 0.04% | $17.0M | added +15.6% | 2024 Q2 |
| Aberdeen Group plc | 121.4k | 0.03% | $14.0M | trimmed -8.9% | 2017 Q3 |
| Militia Capital Management LLC | 84.8k | 0.02% | $9.8M | opened | 2026 Q1 |
| Voleon Capital Management LP | 69.7k | 0.02% | $8.0M | trimmed -6.9% | 2025 Q3 |
| BNP Paribas Financial Markets | 58.1k | 0.01% | $6.7M | added +2.5% | 2020 Q2 |
| Healthcare OF Ontario Pension Plan Trust Fund | 54.2k | 0.01% | $6.2M | trimmed -20.8% | 2023 Q1 |
| Goldman Sachs | 52.4k | 0.01% | $6.0M | added +10.8% | 2024 Q3 |
| Royal Bank OF Canada | 50.0k | 0.01% | $5.8M | trimmed -1.7% | 2013 Q4 |
| Principal Financial Group INC | 46.2k | 0.01% | $5.3M | trimmed -2.1% | 2023 Q4 |
| Mackenzie Financial CORP | 43.2k | 0.01% | $5.0M | added +17% | 2021 Q4 |
| Advisors Capital Management, LLC | 43.0k | 0.01% | $5.0M | added +7.5% | 2018 Q4 |
| Duff & Phelps Investment Management CO | 43.0k | 0.01% | $4.9M | unchanged | 2024 Q2 |
| O'shaughnessy Asset Management, LLC | 42.9k | 0.01% | $4.9M | added +8.7% | 2018 Q3 |
| Metis Global Partners, LLC | 37.0k | 0.01% | $4.3M | added +16.1% | 2023 Q2 |
| Arrowstreet Capital | 34.6k | <0.01% | $4.0M | trimmed -71.5% | 2023 Q4 |
| Northern Trust | 32.1k | <0.01% | $3.7M | added +1.3% | 2022 Q4 |
| U S Global Investors INC | 30.1k | <0.01% | $3.5M | trimmed -18.1% | 2025 Q3 |
| Maryland State Retirement & Pension System | 30.1k | <0.01% | $3.5M | trimmed -21.3% | 2022 Q4 |
| SEI Investments CO | 29.0k | <0.01% | $3.3M | added +208.7% | 2013 Q4 |
| Envestnet Asset Management INC | 27.7k | <0.01% | $3.2M | added +77.5% | 2019 Q1 |
| FMR (Fidelity) | 26.9k | <0.01% | $3.1M | trimmed -21.6% | 2018 Q3 |
| Canada Life Assurance CO | 24.8k | <0.01% | $2.8M | trimmed -5.3% | 2018 Q1 |
| Quent Capital, LLC | 24.7k | <0.01% | $2.8M | unchanged | 2025 Q4 |
| Dimensional Fund Advisors | 23.0k | <0.01% | $2.6M | unchanged | 2022 Q2 |
| Naples Global Advisors, LLC | 21.4k | <0.01% | $2.5M | trimmed -0.9% | 2016 Q1 |
| Uniplan Investment Counsel, INC. | 19.0k | <0.01% | $2.2M | added +196.5% | 2024 Q4 |
| Malaga Cove Capital, LLC | 19.0k | <0.01% | $2.2M | trimmed -2.3% | 2021 Q3 |
| National Bank OF Canada /FI/ | 18.3k | <0.01% | $2.1M | added +4089% | 2023 Q2 |
| Deutsche Bank AG\ | 17.5k | <0.01% | $2.0M | added +1% | 2014 Q1 |
| AQR Capital | 17.3k | <0.01% | $2.0M | trimmed -82% | 2024 Q4 |
| Integrated Quantitative Investments LLC | 17.3k | <0.01% | $2.0M | unchanged | 2025 Q3 |
| Invesco | 17.0k | <0.01% | $2.0M | trimmed -0.9% | 2016 Q3 |
| TrueMark Investments, LLC | 15.1k | <0.01% | $1.7M | added +14.1% | 2025 Q2 |
| Opal Capital LLC | 15.1k | <0.01% | $1.7M | added +14.1% | 2025 Q4 |
| Partners Group Holding AG (focused) | 14.4k | <0.01% | $1.7M | unchanged | 2025 Q4 |
| Ritholtz Wealth Management | 13.7k | <0.01% | $1.6M | added +5.6% | 2020 Q2 |
| ABS Direct Equity Fund LLC | 13.7k | <0.01% | $1.6M | unchanged | 2023 Q4 |
| EverSource Wealth Advisors, LLC | 12.7k | <0.01% | $1.5M | added +3198.7% | 2023 Q1 |
| Vident Advisory, LLC | 12.5k | <0.01% | $1.4M | added +5.8% | 2022 Q4 |
Largest 50 of 166 shown; the full ranked, searchable register is at boothcheck.com/holders/OMAB. 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.