| MBIO | Mustang Bio, Inc. - Common Stock | D | |
| MBLY | Mobileye Global Inc. - Class A Common Stock | | |
| MBNKO | Medallion Bank - Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock, Series G, par value $1.00 per share | | |
| MBOT | Microbot Medical Inc. - Common Stock | | |
| MBRX | Moleculin Biotech, Inc. - Common Stock | D | |
| MBUU | Malibu Boats, Inc. - Common Stock | | |
| MBVI | M3-Brigade Acquisition VI Corp. - Class A Ordinary Shares | | |
| MBVIU | M3-Brigade Acquisition VI Corp. - Units | | |
| MBVIW | M3-Brigade Acquisition VI Corp. - Warrant | | |
| MBWM | Mercantile Bank Corporation - Common Stock | | |
| MBX | MBX Biosciences, Inc. - Common Stock | | |
| MCAH | Mountain Crest Acquisition 6 Corp. - Ordinary Shares | | |
| MCAHR | Mountain Crest Acquisition 6 Corp. - Rights | | |
| MCAHU | Mountain Crest Acquisition 6 Corp. - Units | | |
| MCBS | MetroCity Bankshares, Inc. - Common Stock | | |
| MCFT | MasterCraft Boat Holdings, Inc. - Common Stock | | |
| MCGA | Yorkville Acquisition Corp. - Class A Ordinary Share | | |
| MCGAU | Yorkville Acquisition Corp. - Unit | | |
| MCGAW | Yorkville Acquisition Corp. - Warrant | | |
| MCHB | Mechanics Bancorp - Class A Common Stock | | |
| MCHP | Microchip Technology Incorporated - Common Stock | | SP500 |
| MCHPP | Microchip Technology Incorporated - Depositary Shares Each Representing a 1/20th Interest in a Share of 7.50% Series A Mandatory Convertible Preferred Stock | | |
| MCHX | Marchex, Inc. - Class B Common Stock | | |
| MCRB | Seres Therapeutics, Inc. - Common Stock | | |
| MCRI | Monarch Casino & Resort, Inc. - Common Stock | | |
| MCTA | Charming Medical Limited - Class A Ordinary Shares | | |
| MDAI | Spectral AI, Inc. - Class A Common Stock | | |
| MDAIW | Spectral AI, Inc. - Warrants | | |
| MDB | MongoDB, Inc. - Class A Common Stock | | |
| MDBH | MDB Capital Holdings, LLC - Class A common | | |
| MDCX | Medicus Pharma Ltd. - Common Stock | D | |
| MDCXW | Medicus Pharma Ltd. - Warrant | D | |
| MDGL | Madrigal Pharmaceuticals, Inc. - Common Stock | | |
| MDIA | Mediaco Holding Inc. - Class A Common Stock | | |
| MDLN | Medline Inc. - Class A common stock | | |
| MDLZ | Mondelez International, Inc. - Class A Common Stock | | SP500 |
| MDRR | Medalist Diversified, Inc. - Common Stock | | |
| MDWD | MediWound Ltd. - Ordinary Shares | | |
| MDXG | MiMedx Group, Inc - Common Stock | | |
| MDXH | MDxHealth SA - Ordinary Shares | D | |
| MEDP | Medpace Holdings, Inc. - Common Stock | | |
| MEDS | DataMeds AI, Inc. - Common Stock | | |
| MEGL | Magic Empire Global Limited - Class A Ordinary Shares | | |
| MELI | MercadoLibre, Inc. - Common Stock | | |
| MENS | Jyong Biotech Ltd. - Ordinary shares | | |
| MEOH | Methanex Corporation - Common Stock | | |
| MERC | Mercer International Inc. - Common Stock | D | |
| MESH | Meshflow Acquisition Corp. - Class A Ordinary Shares | | |
| MESHU | Meshflow Acquisition Corp. - Units | | |
| MESHW | Meshflow Acquisition Corp. - Warrants | | |