- MFBP — M&F Bancorp, Inc.
- MFC — Manulife Financial Corporation
- MFC-PB.TO — Manulife Financial Corp
- MFC-PC.TO — Manulife Financial Corporation
- MFC-PM.TO — Manulife Financial Corp
- MFC.TO — Manulife Financial Corporation
- MFCO — Microwave Filter Company, Inc.
- MFCSF — Medical Facilities Corporation
- MFD.AX — Mayfield Childcare Limited
- MFDB — Mutual Federal Bancorp, Inc.
- MFDX — PIMCO RAFI Dynamic Multi-Factor International Equity ETF
- MFEM — PIMCO RAFI Dynamic Multi-Factor Emerging Markets Equity ETF
- MFF.AX — MFF Capital Investments Limited
- MFG — Mizuho Financial Group, Inc.
- MFG.AX — Magellan Financial Group Limited
- MFG.V — Mayfair Gold Corp.
- MFGHF — Mainfreight Limited
- MFGI — Merchants Financial Group, Inc.
- MFI — mF International Limited
- MFI.TO — Maple Leaf Foods Inc.
- MFIC — MidCap Financial Investment Corporation
- MFICL — MidCap Financial Investment Corporation 8.00% Notes due 2028
- MFIG — Motley Fool Innovative Growth ETF
- MFIN — Medallion Financial Corp.
- MFLTY — Missfresh Limited
- MFLX — First Trust Flexible Municipal High Income ETF
- MFMLF — International Iconic Gold Exploration Corp.
- MFMO — Motley Fool Momentum Factor ETF
- MFON — Mobivity Holdings Corp.
- MFP — Midera Food Processing, Inc.
- MFRVF — Minera Frisco, S.A.B. de C.V.
- MFT.TO — Mackenzie Floating Rate Income ETF
- MFUL — Mindful Conservative ETF
- MFUS — PIMCO RAFI Dynamic Multi-Factor U.S. Equity ETF
- MFVL — Motley Fool Value Factor ETF
- MG — Mistras Group, Inc.
- MG.TO — Magna International Inc.
- MGA — Magna International Inc.
- MGA.AX — MetalsGrove Mining Limited
- MGA.TO — Mega Uranium Ltd.
- MGAFF — Mega Uranium Ltd.
- MGAG — Mortgage Oil Corp.
- MGAM — Mobile Global Esports Inc.
- MGAWF — Megaworld Corporation
- MGAWY — Megaworld Corporation
- MGB.TO — Mackenzie Core Plus Global Fixed Income ETF
- MGC — Vanguard Mega Cap ETF
- MGCV — MGC Ventures, Inc.
- MGDDF — Compagnie Générale des Établissements Michelin Société en commandite par actions
- MGDDY — Compagnie Générale des Établissements Michelin Société en commandite par actions
- MGEE — MGE Energy, Inc.
- MGEQ.NE — MANULIFE GLOBAL EQUITY CLASS
- MGFX — Monarch Gulf Exploration, Inc.
- MGG.V — Minaurum Gold Inc.
- MGH.AX — MAAS Group Holdings Limited
- MGHCF — Minco Capital Corp.
- MGHL — Morgan Group Holding Co.
- MGHTF — Mercury NZ Limited
- MGIDF — Magnum Goldcorp Inc.
- MGIH — Millennium Group International Holdings Limited
- MGK — Vanguard Mega Cap Growth ETF
- MGL.AX — Magontec Limited
- MGLD — The Marygold Companies, Inc.
- MGLG — Magellan Energy, Ltd.
- MGLI — Magellan Industries, Inc.
- MGLLF — Magellan Financial Group Limited
- MGLUY — Magazine Luiza S.A.
- MGM — MGM Resorts International
- MGM.V — Maple Gold Mines Ltd.
- MGMA — Metro Global Media, Inc.
- MGMLF — Maple Gold Mines Ltd.
- MGMNF — Magna Mining Inc.
- MGMT — OneAscent Enhanced Small and Mid Cap ETF allast Small/Mid Cap
- MGN — Megan Holdings Limited Ordinary Shares
- MGNC — Mag Magna Corp.
- MGNI — Magnite, Inc.
- MGNR — American Beacon GLG Natural Resources ETF
- MGNT — Meganet Corporation
- MGNX — MacroGenics, Inc.
- MGOV — First Trust Intermediate Government Opportunities ETF
- MGPHF — Mason Resources Inc.
- MGPI — MGP Ingredients, Inc.
- MGPPF — Megaport Limited
- MGPRF — Plascred Circular Innovations Inc.
- MGPUF — M&G plc
- MGR — Affiliated Managers Group, Inc.
- MGR.AX — Mirvac Group
- MGRB — Affiliated Managers Group, Inc.
- MGRC — McGrath RentCorp
- MGRD — Affiliated Managers Group, Inc.
- MGRE — Affiliated Managers Group, Inc.
- MGRO.V — MustGrow Biologics Corp.
- MGROF — MustGrow Biologics Corp.
- MGRT — Mega Fortune Company Limited
- MGRUF — Morguard Real Estate Investment Trust
- MGRX — Mangoceuticals, Inc.
- MGSB.NE — MACKENZIE GLOBAL SUSTAINABLE BOND ETF
- MGT.AX — Magnetite Mines Limited
- MGTC — Megatech Corporation
- MGTE — Marblegate Capital Corporation
