- MPC — Marathon Petroleum Corporation
- MPC.TO — Madison Pacific Properties Inc.
- MPCB — Mountain Pacific Bancorp, Inc.
- MPCMF — Mapletree Pan Asia Commercial Trust
- MPCT-UN.TO — Dream Impact Trust
- MPEG — Innovacom Inc.
- MPFRF — Mapfre, S.A.
- MPFRY — Mapfre, S.A.
- MPG — Leverage Shares 2x Long MP Daily ETF
- MPGPF — PageGroup plc
- MPGPY — PageGroup plc
- MPH.V — Medicure Inc.
- MPHD — Media Pal Holdings, Corp.
- MPHYF — McPhy Energy S.A.
- MPIR — Empire Diversified Energy, Inc.
- MPK.AX — Many Peaks Fpo [mpk]
- MPL.AX — Medibank Private Limited
- MPLT — MapLight Therapeutics, Inc.
- MPLX — MPLX Lp
- MPML — MPM Technologies, Inc.
- MPNGF — Meituan
- MPNGY — Meituan
- MPP.AX — Metro Performance Glass Limited
- MPRO — Monarch ProCap ETF
- MPT — Medical Properties Trust, Inc.
- MPTI — M-tron Industries, Inc.
- MPU — Mega Matrix Corp.
- MPVDF — Mountain Province Diamonds Inc.
- MPW.AX — Metal Powder Works Limited
- MPWR — Monolithic Power Systems, Inc.
- MPXOF — MPX International Corporation
- MPZAF — MIPS AB (publ)
- MPZAY — Mips AB (publ)
- MPZZF — MPC Container Ships ASA
- MQ — Marqeta, Inc.
- MQBKY — Macquarie Group Limited
- MQG.AX — Macquarie Group Limited
- MQM.V — MetalQuest Mining Inc.
- MQQQ — Tradr 2X Long Innovation 100 Monthly ETF
- MQR.AX — Marquee Resources Limited
- MRA — Graniteshares Autocallable Mara ETF
- MRAAF — Murata Manufacturing Co., Ltd.
- MRAAY — Murata Manufacturing Co., Ltd.
- MRAI — Marpai, Inc.
- MRAL — GraniteShares 2x Long MARA Daily ETF
- MRAM — Everspin Technologies, Inc.
- MRBK — Meridian Corporation
- MRC.TO — Morguard Corporation
- MRCBF — Morguard Corporation
- MRCHF — H.U. Group Holdings, Inc.
- MRCIF — Mercari, Inc.
- MRCOU — Mercator Acquisition Corp.
- MRCY — Mercury Systems, Inc.
- MRD.AX — Mount Ridley Mines Limited
- MRD.TO — Melcor Developments Ltd.
- MRDH — Meridian Holdings, Inc.
- MRDN — Meridian Holdings Inc.
- MRE.TO — Martinrea International Inc.
- MREL.TO — Middlefield Real Estate Dividend ETF
- MREO — Mereo BioPharma Group plc
- MRES — Institute of Biomedical Research Corp.
- MRETF — Martinrea International Inc.
- MRG-UN.TO — Morguard North American Residential Real Estate Investment Trust
- MRGR — ProShares - Merger ETF
- MRIB — Marani Brands, Inc.
- MRIRF — Route 109 Resources Inc.
- MRK — Merck & Co., Inc.
- MRKR — Marker Therapeutics, Inc.
- MRLLF — Minera IRL Limited
- MRM — MEDIROM Healthcare Technologies Inc.
- MRM.CN — Micromem Technologies Inc.
- MRMD — MariMed Inc.
- MRMD.CN — MariMed Inc.
- MRNA — Moderna, Inc.
- MRNFF — Meren Energy Inc.
- MRNJ — Metatron, Inc.
- MRNO — Murano Global Investments PLC Ordinary Shares
- MRNOW — Murano Global Investments PLC Warrants
- MRNX — Daily Target 2X Long MRNA ETF
- MRNY — YieldMax MRNA Option Income Strategy ETF
- MRP — Millrose Properties, Inc.
- MRPI — Mera Pharmaceuticals, Inc.
- MRPLY — Mr Price Group Limited
- MRPRF — MERLIN Properties SOCIMI, S.A.
- MRPS — Microphonics, Inc.
- MRPT — MacReport.Net, Inc.
- MRPZF — Mr Price Group Limited
- MRQ.AX — MRG Metals Ltd
- MRR.AX — MinRex Resources Limited
- MRRCF — Wayland Group Corp.
- MRRDF — Meridian Mining UK Societas
- MRRYF — Mary Agrotechnologies Inc.
- MRSH — Marsh & McLennan Companies, Inc.
- MRSK — Toews Agility Shares Managed Risk ETF
- MRSKF — DMG Mori Co., Ltd.
- MRT — Marti Technologies, Inc.
- MRT-UN.TO — Morguard Real Estate Investment Trust
- MRT.AX — Maritana Minerals Limited
- MRTI — Maxus Realty Trust, Inc.
- MRTN — Marten Transport, Ltd.
