| NASDAQ | MERC | 139 |
| NASDAQ | MESA | 26 |
| NYSE | MET | 60 |
| NASDAQ | META | 1,452 |
| NASDAQ | METC | 60 |
| NASDAQ | METCB | 24 |
| NYSE | MFA | 37 |
| NYSE | MFG | 2 |
| NASDAQ | MFIC | 4 |
| NASDAQ | MFIN | 44 |
| NYSE | MFM | 1 |
| NYSE | MFV | 1 |
| NYSE | MG | 78 |
| NASDAQ | MGEE | 41 |
| NASDAQ | MGI | 23 |
| NYSE | MGM | 213 |
| NASDAQ | MGNI | 169 |
| NASDAQ | MGNX | 95 |
| NYSE | MGP | 18 |
| NASDAQ | MGPI | 196 |
| NASDAQ | MGRC | 159 |
| NASDAQ | MGRX | 1 |
| NASDAQ | MGTA | 21 |
| NASDAQ | MGTX | 46 |
| NASDAQ | MGX | 7 |
| NYSE | MGY | 43 |
| NASDAQ | MGYR | 29 |
| NYSE | MHI | 64 |
| NYSE | MHK | 166 |
| NASDAQ | MHLD | 26 |
| NYSE | MHO | 53 |
| NYSE | MIC | 70 |
| NASDAQ | MICS | 53 |
| NASDAQ | MICT | 7 |
| NASDAQ | MIDD | 115 |
| NASDAQ | MIGI | 2 |
| NASDAQ | MILE | 1 |
| NASDAQ | MIME | 193 |
| NYSE MKT | MIMO | 9 |
| NYSE | MIN | 2 |
| NASDAQ | MIND | 6 |
| NASDAQ | MINDP | 1 |
| NASDAQ | MINM | 12 |
| NYSE | MIO | 40 |
| NYSE | MIR | 18 |
| NASDAQ | MIRA | 2 |
| NASDAQ | MIRM | 48 |
| NASDAQ | MIST | 17 |
| NASDAQ | MITK | 140 |
| NYSE | MITT | 22 |
