| MIN | Aberdeen Intermediate Income Fund Common Shares of Beneficial Interest | | |
| MIR | Mirion Technologies, Inc. Class A Common Stock | | |
| MITN | TPG Mortgage Investment Trust, Inc. 9.500% Senior Notes due 2029 | | |
| MITP | TPG Mortgage Investment Trust, Inc. 9.500% Senior Notes due 2029 | | |
| MITT | TPG Mortgage Investment Trust, Inc. Common Stock | | |
| MITT-A | TPG Mortgage Investment Trust, Inc. 8.25% Series A Cumulative Redeemable Preferred Stock | | |
| MITT-B | TPG Mortgage Investment Trust, Inc. 8.00% Series B Cumulative Redeemable Preferred Stock | | |
| MITT-C | TPG Mortgage Investment Trust, Inc. 8.00% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock, $0.01 par value per share | | |
| MIY | Blackrock MuniYield Michigan Quality Fund, Inc. Common Stock | | |
| MKC | McCormick & Company, Incorporated Common Stock | | SP500 |
| MKC.V | McCormick & Company, Incorporated Common Stock | | |
| MKL | Markel Group Inc. Common Stock | | |
| MLI | Mueller Industries, Inc. Common Stock | | |
| MLM | Martin Marietta Materials, Inc. Common Stock | | SP500 |
| MLP | Maui Land & Pineapple Company, Inc. Common Stock | | |
| MLR | Miller Industries, Inc. Common Stock | | |
| MMD | NYLIM MacKay DefinedTerm Muni Opportunities Fund Common Shares | | |
| MMI | Marcus & Millichap, Inc. Common Stock | | |
| MMM | 3M Company Common Stock | | SP500 |
| MMS | Maximus, Inc. Common Stock | | |
| MMT | Aberdeen Multi-Market Income Fund Common Shares of Beneficial Interest | | |
| MMU | Western Asset Managed Municipals Fund, Inc. Common Stock | | |
| MNR | Mach Natural Resources LP Common Units representing Limited Partner Interests | | |
| MNSO | MINISO Group Holding Limited American Depositary Shares, each representing four Ordinary Shares | | |
| MNTN | MNTN, Inc. Class A Common Stock | | |
| MO | Altria Group, Inc. | | SP500 |
| MOD | Modine Manufacturing Company Common Stock | | |
| MOG.A | Moog Inc. Class A Common Stock | | |
| MOG.B | Moog Inc. Class B Common Stock | | |
| MOGU | MOGU Inc. American Depositary Shares (each representing 25 Class A Ordinary Shares) | | |
| MOH | Molina Healthcare Inc Common Stock | | |
| MOS | Mosaic Company (The) Common Stock | | SP500 |
| MOV | Movado Group Inc. Common Stock | | |
| MP | MP Materials Corp. Common Stock | | |
| MPA | Blackrock MuniYield Pennsylvania Quality Fund Common Stock | | |
| MPC | Marathon Petroleum Corporation Common Stock | | SP500 |
| MPLX | MPLX LP Common Units Representing Limited Partner Interests | | |
| MPT | Medical Properties Trust, Inc. common stock | | |
| MPV | Barings Participation Investors Common Stock | | |
| MQY | Blackrock MuniYield Quality Fund, Inc. Common Stock | | |
| MRK | Merck & Company, Inc. Common Stock (new) | | SP500 |
| MRP | Millrose Properties, Inc. Class A Common Stock | | |
| MRSH | Marsh Common Stock | | SP500 |
| MS | Morgan Stanley Common Stock | | SP500 |
| MS-A | Morgan Stanley Dep Shs repstg 1/1000 Pfd Ser A | | |
| MS-E | Morgan Stanley DEPOSITARY SHARES REP 1/1000TH SHARES FIXED/FLTG PREFERRED STOCK SERIES E | | |
| MS-F | Morgan Stanley Dep Shs Rpstg 1/1000th Int Prd Ser F Fxd to Flag | | |
| MS-I | Morgan Stanley Depository Shares Representing 1/1000th Preferred Series 1 Fixed to Floating Non (Cum) | | |
| MS-K | Morgan Stanley Depositary Shares, each representing 1/1,000th of a share of Fixed-to-Floating Rate Non-Cumulative Preferred Stock, Series K | | |
| MS-L | Morgan Stanley Depositary Shares, each representing 1/1,000th of a share of 4.875% Non-Cumulative Preferred Stock, Series L | | |