| MRRDF | Meridian Mining PLC | Basic Materials | $777M | — | 0 |
| MIACW | Meridian3 Industrials Acquisition Corp | — | — | — | 0 |
| MMSI | Merit Medical Systems, Inc. | Healthcare | $5.2B | — | 0 |
| MTH | Meritage Homes Corporation | Consumer Cyclical | $4.3B | — | 0 |
| MRLN | Merlin, Inc. | Industrials | $172M | — | 0 |
| IPB | Merrill Lynch Depositor Inc. | — | — | — | 0 |
| MLAB | Mesa Laboratories, Inc. | Healthcare | $769M | — | 0 |
| MTR | Mesa Royalty Trust | Energy | $4.5M | — | 0 |
| MSB | Mesabi Trust | Basic Materials | $254M | — | 0 |
| MESHW | Meshflow Acquisition Corp. | — | — | — | 0 |
| MEOBF | Mesoblast Limited | Healthcare | $2.5B | — | 0 |
| MTTAF | Meta Critical Minerals Inc. | — | — | — | 0 |
| META | Meta Platforms, Inc. | Communication Services | $2.0T | — | 0 |
| MGX | Metagenomi, Inc. Common Stock | Healthcare | $43.3M | — | 0 |
| MSSWF | Metal Sky Star Acquisition Corporation | — | — | — | 0 |
| MTLK | Metalink Ltd. | Financial Services | $0.3M | — | 0 |
| MTA | Metalla Royalty & Streaming Ltd. | Basic Materials | $949M | — | 0 |
| MTMCF | Metallium Limited/ADR | — | — | — | 0 |
| MTUS | Metallus Inc. | Basic Materials | $788M | — | 0 |
| MATH | Metalpha Technology Holding Limited | Financial Services | $43.4M | — | 0 |
| MTAL-WT | Metals Acquisition Corp. II | — | — | — | 0 |
| MEAOF | MetaOptics Ltd | — | — | — | 0 |
| MTPLF | Metaplanet Inc. | — | — | — | 0 |
| MVCO | Metavesco, Inc. | Financial Services | $2.9M | — | 0 |
| MTVA | MetaVia Inc. | Healthcare | $3.7M | — | 0 |