- MTRAX — MainStay Income Builder Fund Class A
- MTRN — Materion Corporation
- MTRX — Matrix Service Company
- MTRY — Monterey Bio Acquisition Corporation
- MTRYU — Monterey Bio Acquisition Corporation
- MTRYW — Monterey Bio Acquisition Corporation
- MTS.V — Metallis Resources Inc.
- MTSI — MACOM Technology Solutions Holdings, Inc.
- MTSL — Mer Telemanagement Solutions Ltd.
- MTSN — Mattson Technology Inc.
- MTSR — Metsera, Inc.
- MTT.V — Magna Terra Minerals Inc.
- MTTIX — Manning & Napier Target 2040 Series Class I
- MTTR — Matterport, Inc.
- MTU.V — Manitou Gold Inc.
- MTUIX — Manning & Napier Target 2045 Series Class I
- MTUL — ETRACS 2x Leveraged MSCI US Momentum Factor TR ETN
- MTUS — Metallus Inc.
- MTVA — MetaVia Inc.
- MTVC — Motive Capital Corp II
- MTVC-UN — Motive Capital Corp II
- MTVR — L&G Metaverse ESG Exclusions UCITS ETF
- MTW — The Manitowoc Company, Inc.
- MTX — Minerals Technologies Inc.
- MTX.V — Metalex Ventures Ltd.
- MTXVX — MainStay Income Builder Fund Class R3
- MTY.TO — MTY Food Group Inc.
- MTYIX — Manning & Napier Target 2050 Series Class I
- MTYY — GraniteShares YieldBOOST MSTR ETF
- MTZ — MasTec, Inc.
- MTZIX — Manning & Napier Target 2055 Series Class I
- MU — Micron Technology, Inc.
- MU.TO — Micron Technology, Inc.
- MUA — BlackRock MuniAssets Fund, Inc.
- MUB — iShares National Muni Bond ETF
- MUB.TO — Mackenzie Unconstrained Bond ETF
- MUC — BlackRock MuniHoldings California Quality Fund, Inc.
- MUDS — Mudrick Capital Acquisition Corporation II
- MUDSU — Mudrick Capital Acquisition Corporation II
- MUDSW — Mudrick Capital Acquisition Corporation II
- MUE — BlackRock MuniHoldings Quality Fund II, Inc.
- MUFG — Mitsubishi UFJ Financial Group, Inc.
- MUHLX — Muhlenkamp Fund
- MUI — BlackRock Municipal Income Fund, Inc.
- MUJ — BlackRock MuniHoldings New Jersey Quality Fund, Inc.
- MULC.TO — Manulife Multifactor U.S. Large Cap Index ETF
- MULL — GraniteShares 2x Long MU Daily ETF
- MULN — Mullen Automotive, Inc.
- MULT — Franklin Multisector Income ETF
- MUMC.TO — Manulife Multifactor U.S. Mid Cap Index ETF
- MUNA — Northern Trust 2030 Tax-Exempt Distributing Ladder ETF
- MUNB — Northern Trust 2035 Tax-Exempt Distributing Ladder ETF
- MUNC — Northern Trust 2045 Tax-Exempt Distributing Ladder ETF
- MUND — Northern Trust 2055 Tax-Exempt Distributing Ladder ETF
- MUNDX — Mundoval
- MUNI — PIMCO Intermediate Municipal Bond Active Exchange-Traded Fund
- MUNX — AMG GW&K Muni Income ETF
- MUR — Murphy Oil Corporation
- MUR.V — Murchison Minerals Ltd.
- MURA — Mural Oncology plc
- MURAV — Mural Oncology plc Ordinary Shares When Issued
- MURF — Murphy Canyon Acquisition Corp.
- MURFU — Murphy Canyon Acquisition Corp.
- MURFW — Murphy Canyon Acquisition Corp.
- MUS.TO — Mackenzie Maximum Diversification US Index ETF
- MUSA — Murphy USA Inc.
- MUSC.TO — Manulife Multifactor U.S. Small Cap Index ETF
- MUSE — TCW Multisector Credit Income ETF
- MUSH.V — Mercanto Holdings Inc.
- MUSI — American Century Multisector Income ETFAmerican Century Multisector Income ETFAmerican Century Multisector Income ETF
- MUSQ — MUSQ Global Music Industry Index ETF
- MUST — Columbia Multi-Sector Municipal Income ETF
- MUTE — Direxion Daily Communication Services Index Bear 3X Shares
- MUTHX — Mutual Shares Corporation Cl Z (Series of Franklin Mutual Ser Fd Inc.)
- MUU — Direxion Daily MU Bull 2X ETF
- MUX — McEwen Mining Inc.
- MUX.TO — McEwen Mining Inc.
- MUYY — GraniteShares YieldBOOST MU ETF
- MUZ — Defiance Daily Target 2X Short MU ETF
- MUZE — Muzero Acquisition Corp Class A Ordinary Shares
- MUZEU — Muzero Acquisition Corp Unit
- MUZEW — Muzero Acquisition Corp Warrant
- MVAI.V — Minerva Intelligence Inc.
- MVALX — Meridian Contrarian Fund Legacy Class
- MVBF — MVB Financial Corp.
- MVCAX — MFS Mid Cap Value Fund - Class A
- MVCKX — MFS Mid Cap Value Fund Class R6
- MVF — BlackRock MuniVest Fund, Inc.
- MVIIX — Praxis Value Index I
- MVIN — Natixis Seeyond International Minimum Volatility ETF
- MVIS — MicroVision, Inc.
- MVLL — GraniteShares 2x Long MRVL Daily ETF
- MVO — MV Oil Trust
- MVP — Roundhill Pro Sports Media & Apparel ETF
- MVP.TO — MediaValet Inc.
- MVPA — Miller Value Partners Appreciation ETF
- MVPL — Miller Value Partners Leverage ETF
- MVPS — Amplify Thematic All-Stars ETF
- MVRL — ETRACS Monthly Pay 1.5x Leveraged Mortgage REIT ETN
- MVST — Microvast Holdings, Inc.
