Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
728 institutional managers reported holding MAA for the quarter ended Mar 31, 2026. Together they hold about 87% of shares outstanding; the top 10 hold 51%. 90 opened new positions; 114 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 18.77M | 16.08% | $2.29B | added +0.9% | ≤2013 |
| BlackRock | 13.03M | 11.16% | $1.59B | added +1.5% | ≤2013 |
| State Street | 8.00M | 6.86% | $977.8M | trimmed -1% | ≤2013 |
| Viking Global | 4.80M | 4.11% | $586.2M | added +23.7% | 2025 Q1 |
| Geode Capital | 3.50M | 3.00% | $427.1M | added +2.1% | ≤2013 |
| APG Asset Management N.v. | 3.21M | 2.75% | $391.6M | added +3.4% | 2013 Q3 |
| Invesco | 2.43M | 2.08% | $296.9M | added +12.8% | ≤2013 |
| Dimensional Fund Advisors | 1.77M | 1.52% | $216.5M | added +3.7% | ≤2013 |
| Northern Trust | 1.75M | 1.50% | $213.3M | trimmed -18.5% | ≤2013 |
| MFS Investment Management | 1.66M | 1.43% | $203.4M | trimmed -9.2% | ≤2013 |
| Morgan Stanley | 1.60M | 1.37% | $195.2M | trimmed -3.3% | ≤2013 |
| Charles Schwab Investment Management | 1.60M | 1.37% | $194.8M | added +3.7% | ≤2013 |
| Goldman Sachs | 1.48M | 1.27% | $180.5M | added +30.1% | ≤2013 |
| River Road Asset Management, LLC | 1.43M | 1.22% | $174.5M | added +52.3% | 2023 Q4 |
| Deutsche Bank AG\ | 1.41M | 1.21% | $172.0M | trimmed -4.5% | 2013 Q3 |
| Barrow Hanley Mewhinney & Strauss LLC | 1.25M | 1.07% | $153.0M | trimmed -20.6% | 2024 Q1 |
| Legal & General Group PLC | 1.15M | 0.98% | $140.3M | trimmed -6% | ≤2013 |
| 1832 Asset Management L.p. | 1.05M | 0.90% | $128.6M | added +2.2% | 2020 Q4 |
| Duff & Phelps Investment Management CO | 849.7k | 0.73% | $103.8M | unchanged | 2017 Q3 |
| Bank OF America CORP /DE/ | 841.6k | 0.72% | $102.8M | added +11.5% | ≤2013 |
| AQR Capital | 778.5k | 0.67% | $95.1M | added +95.8% | ≤2013 |
| UBS | 698.1k | 0.60% | $85.3M | trimmed -59.8% | ≤2013 |
| BNY Mellon | 645.7k | 0.55% | $78.9M | trimmed -3.4% | ≤2013 |
| Centersquare Investment Management LLC | 620.2k | 0.53% | $75.8M | added +288.6% | 2018 Q2 |
| Raymond James Financial INC | 535.6k | 0.46% | $65.4M | added +16% | ≤2013 |
| Amundi | 517.2k | 0.44% | $63.2M | added +46.9% | 2015 Q3 |
| SG Americas Securities, LLC | 512.1k | 0.44% | $62.6M | added +524% | ≤2013 |
| Quantinno Capital Management LP | 503.4k | 0.43% | $61.5M | added +68.4% | 2021 Q4 |
| Teacher Retirement System OF Texas | 444.3k | 0.38% | $54.3M | added +55.2% | 2025 Q1 |
| Hsbc Holdings PLC | 439.8k | 0.38% | $53.7M | added +2.1% | ≤2013 |
| Crawford Investment Counsel INC | 439.0k | 0.38% | $53.6M | added +20.5% | 2024 Q3 |
| AllianceBernstein | 423.5k | 0.36% | $51.7M | trimmed -6.6% | ≤2013 |
| Anchor Capital Advisors LLC | 422.1k | 0.36% | $51.6M | added +7.4% | ≤2013 |
| Mitsubishi UFJ Asset Management CO., LTD. | 416.2k | 0.36% | $50.8M | added +5.3% | ≤2013 |
| Nuveen | 409.9k | 0.35% | $50.1M | trimmed -66.4% | ≤2013 |
| Wellington Management | 383.1k | 0.33% | $46.8M | trimmed -36.6% | 2022 Q3 |
| Gotham Asset Management | 380.1k | 0.33% | $46.4M | added +15% | 2019 Q2 |
| Diamond Hill Capital Management INC | 372.0k | 0.32% | $45.4M | trimmed -4.4% | 2023 Q3 |
| State of Tennessee, Department of Treasury | 367.1k | 0.31% | $44.8M | added +12.8% | 2015 Q3 |
| Franklin Resources | 365.4k | 0.31% | $44.6M | trimmed -28.7% | 2016 Q1 |
| Aberdeen Group plc | 362.2k | 0.31% | $44.2M | added +143.6% | 2017 Q3 |
| Janus Henderson | 361.6k | 0.31% | $44.2M | trimmed -46.6% | ≤2013 |
| First Trust Advisors LP | 350.2k | 0.30% | $42.8M | added +3.3% | ≤2013 |
| Sumitomo Mitsui Trust Group, INC. | 347.8k | 0.30% | $42.5M | trimmed -4.5% | ≤2013 |
| Russell Investments Group, LTD. | 346.4k | 0.30% | $42.3M | trimmed -19.1% | 2016 Q4 |
| Swiss National Bank | 343.6k | 0.29% | $42.0M | added +7.1% | ≤2013 |
| Silvercrest Asset Management Group LLC | 320.8k | 0.28% | $39.2M | trimmed -1.5% | ≤2013 |
| Citadel Advisors | 309.7k | 0.27% | $37.8M | trimmed -73% | ≤2013 |
| Prudential Financial INC | 309.6k | 0.27% | $37.8M | trimmed -3.2% | ≤2013 |
| Barclays PLC | 306.7k | 0.26% | $37.5M | trimmed -5.7% | ≤2013 |
Largest 50 of 728 shown; the full ranked, searchable register is at boothcheck.com/holders/MAA. 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.