| MRX | Marex Group Limited | Financial Services | $5.2B | — | 0 |
| MRMD | MariMed Inc. | Healthcare | $29.7M | — | 0 |
| MARPS | Marine Petroleum Trust | Energy | $8.9M | — | 0 |
| HZO | MarineMax, Inc. | Consumer Cyclical | $1.2B | — | 0 |
| MTEKW | Maris-Tech Ltd. | Technology | $5.3M | — | 0 |
| MKL | Markel Corporation | Financial Services | $21.5B | — | 0 |
| MRKR | Marker Therapeutics, Inc. | Healthcare | $19.8M | — | 0 |
| MTAKW | Market Technology Acquisition Corp. | — | — | — | 0 |
| MKTX | MarketAxess Holdings Inc. | Financial Services | $5.8B | — | 0 |
| MKTW | MarketWise, Inc. | Financial Services | $50.5M | — | 0 |
| MRAI | Marpai, Inc. | Healthcare | $77.1M | — | 0 |
| MQ | Marqeta, Inc. | Technology | $1.6B | — | 0 |
| MAR | Marriott International, Inc. | Consumer Cyclical | $91.7B | — | 0 |
| VAC | Marriott Vacations Worldwide Corporation | Consumer Cyclical | $3.5B | — | 0 |
| MRSH | Marsh & McLennan Companies, Inc. | Financial Services | $81.1B | — | 0 |
| MRTN | Marten Transport, Ltd. | Industrials | $1.0B | — | 0 |
| MRT | Marti Technologies, Inc. | Technology | $183M | — | 0 |
| MLM | Martin Marietta Materials, Inc. | Basic Materials | $28.8B | — | 0 |
| MMLP | Martin Midstream Partners L.P. | Energy | $87.2M | — | 0 |
| MARUF | Marubeni Corporation | Industrials | $50.0B | — | 0 |
| MAWAF | Maruwa Co., Ltd./ADR | — | — | — | 0 |
| MRVL | Marvell Technology, Inc. | Technology | $229B | — | 0 |
| MVNC | Marvion Inc. | Industrials | $1.0M | — | 0 |
| MWYN | Marwynn Holdings, Inc. Common stock | Consumer Cyclical | $22.0M | — | 0 |
| MAS | Masco Corporation | Basic Materials | $13.3B | — | 0 |