| M split history Macy's, Inc. | NYSE | Cyclical Consumer Goods & Services |
| MA split history Mastercard Inc | NYSE | Industrials |
| MAA split history Mid-America Apartment Communities Inc | NYSE | Financials |
| MAC split history Macerich Co | NYSE | Financials |
| MACC split history MACC Private Equities Inc. | NASDAQ | Financials |
| MACE split history Mace Security International, Inc. | NASDAQ | Non-Cyclical Consumer Goods & Services |
| MACK split history Merrimack Pharmaceuticals Inc | NASDAQ | Healthcare |
| MAG split history Magnetek Inc | NASDAQ | Industrials |
| MAGS split history Magal Security Systems Ltd. (USA) | NASDAQ | Industrials |
| MAIL split history IncrediMail Ltd. (USA) | NASDAQ | Technology |
| MAIN split history Main Street Capital Corporation | NYSE | Financials |
| MAKO split history MAKO Surgical Corp. | NASDAQ | Healthcare |
| MALL split history PC Mall, Inc. | NASDAQ | Services |
| MAM split history Maine & Maritimes Corporation | AMEX | Utilities |
| MAMS split history MAM Software Group Inc. | NASDAQ | Technology |
| MAN split history ManpowerGroup Inc. | NYSE | Industrials |
| MANH split history Manhattan Associates, Inc. | NASDAQ | Technology |
| MANT split history Mantech International Corp | NASDAQ | Technology |
| MANU split history Manchester United PLC | NYSE | Cyclical Consumer Goods & Services |
| MAPP split history MAP Pharmaceuticals Inc. | NASDAQ | Healthcare |
| MAR split history Marriott International Inc | NASDAQ | Cyclical Consumer Goods & Services |
| MARA split history Marathon Patent Group Inc | NASDAQ | Industrials |
| MARK split history Remark Media Inc | NASDAQ | Technology |
| MARPS split history Marine Petroleum Trust | NASDAQ | Financials |
| MAS split history Masco Corporation | NYSE | Cyclical Consumer Goods & Services |
| MASC split history Material Sciences Corporation | NASDAQ | Basic Materials |
| MASI split history Masimo Corporation | NASDAQ | Healthcare |
| MAT split history Mattel, Inc. | NASDAQ | Cyclical Consumer Goods & Services |
| MATK split history Martek Biosciences Corp. | NASDAQ | Healthcare |
| MATR split history Mattersight Corp | NASDAQ | Cyclical Consumer Goods & Services |
| MATW split history Matthews International Corp | NASDAQ | Non-Cyclical Consumer Goods & Services |
| MAV split history Pioneer Municipal High Income Advantage | NYSE | Financials |
| MAXY split history Maxygen, Inc. | NASDAQ | Healthcare |
| MAY split history Malaysia Fund Inc. | NYSE | Financials |
| MAYS split history J.W. Mays Inc | NASDAQ | Financials |
| MBA split history CIBT Education Group Inc (USA) | NYSEAMEX | Services |
| MBCN split history Middlefield Banc Corp | NASDAQ | Financials |
| MBFI split history MB Financial Inc | NASDAQ | Financials |
| MBI split history MBIA Inc. | NYSE | Financials |
| MBII split history Marrone Bio Innovations Inc | NASDAQ | Basic Materials |
| MBLX split history Metabolix, Inc. | NASDAQ | Basic Materials |
| MBLY split history Mobileye NV | NYSE | Technology |
| MBND split history Multiband Corp | NASDAQ | Telecommunications Services |
| MBR split history Mercantile Bancorp, Inc. | AMEX | Financials |
| MBRG split history Middleburg Financial Corp. | NASDAQ | Financials |
| MBT split history Mobile TeleSystems OJSC (ADR) | NYSE | Telecommunications Services |
| MBTF split history MBT Financial Corp. | NASDAQ | Financials |
| MBUU split history Malibu Boats Inc | NASDAQ | Cyclical Consumer Goods & Services |
| MBVT split history Merchants Bancshares,Inc. | NASDAQ | Financials |
| MBWM split history Mercantile Bank Corp. | NASDAQ | Financials |
| MC split history Moelis & Co | NYSE | Financials |
| MCA split history Blackrock Muniyld California Quty Fd Inc | NYSE | Financials |
| MCBC split history Macatawa Bank Corporation | NASDAQ | Financials |
| MCBF split history Monarch Community Bancorp, Inc. | NASDAQ | Financials |
| MCBI split history MetroCorp Bancshares, Inc. | NASDAQ | Financials |
| MCBK split history Madison County Financial Inc | NASDAQ | Financials |
| MCC split history Medley Capital Corp | NYSE | Financials |
| MCCC split history Mediacom Communications Corporation | NASDAQ | Services |
| MCD split history McDonald's Corporation | NYSE | Cyclical Consumer Goods & Services |
| MCEP split history Mid-Con Energy Partners LP | NASDAQ | Energy |
| MCF split history Contango Oil & Gas Company | NYSEMKT | Energy |
| MCGC split history MCG Capital Corp | NASDAQ | Financials |
| MCHP split history Microchip Technology Inc. | NASDAQ | Technology |
| MCHX split history Marchex, Inc. | NASDAQ | Cyclical Consumer Goods & Services |
| MCI split history Babson Capital Corporate Investors | NYSE | Financials |
| MCK split history McKesson Corporation | NYSE | Non-Cyclical Consumer Goods & Services |
| MCN split history Madison Covered Call & Equity Strtgy Fd | NYSE | Financials |
| MCO split history Moody's Corporation | NYSE | Industrials |
| MCOX split history Mecox Lane Ltd | NASDAQ | Cyclical Consumer Goods & Services |
| MCP split history Molycorp Inc | NYSE | Basic Materials |
| MCR split history MFS Charter Income Trust | NYSE | Financials |
| MCRI split history Monarch Casino & Resort, Inc. | NASDAQ | Cyclical Consumer Goods & Services |
| MCRL split history Micrel, Incorporated | NASDAQ | Technology |
| MCRS split history MICROS Systems, Inc. | NASDAQ | Technology |
| MCS split history The Marcus Corporation | NYSE | Cyclical Consumer Goods & Services |
| MCUR split history Macrocure Ltd | NASDAQ | Healthcare |
| MCY split history Mercury General Corporation | NYSE | Financials |
| MCZ split history Mad Catz Interactive, Inc. (USA) | NYSEMKT | Technology |
| MD split history MEDNAX Inc | NYSE | Healthcare |
| MDAS split history MedAssets, Inc. | NASDAQ | Technology |
| MDC split history M.D.C. Holdings, Inc. | NYSE | Cyclical Consumer Goods & Services |
| MDCA split history MDC Partners Inc | NASDAQ | Cyclical Consumer Goods & Services |
| MDCI split history Medical Action Industries | NASDAQ | Healthcare |
| MDCO split history The Medicines Company | NASDAQ | Healthcare |
| MDF split history Metropolitan Health Networks, Inc. | AMEX | Healthcare |
| MDH split history MHI Hospitality Corporation | NASDAQ | Services |
| MDLY split history Medley Management Inc | NYSE | Financials |
| MDLZ split history Mondelez International Inc | NASDAQ | Non-Cyclical Consumer Goods & Services |
| MDM split history Mountain Province Diamonds, Inc. | NYSEMKT | Basic Materials |
| MDNU split history Medical Nutrition USA, Inc. | NASDAQ | Healthcare |
| MDP split history Meredith Corporation | NYSE | Cyclical Consumer Goods & Services |
| MDR split history McDermott International | NYSE | Energy |
| MDRX split history Allscripts Healthcare Solutions Inc | NASDAQ | Healthcare |
| MDS split history Midas, Inc. | NYSE | Services |
| MDSO split history Medidata Solutions Inc | NASDAQ | Technology |
| MDT split history Medtronic, Inc. | NYSE | Healthcare |
| MDTH split history MedCath Corporation | NASDAQ | Healthcare |
| MDU split history MDU Resources Group Inc | NYSE | Utilities |
| MDVN split history Medivation Inc | NASDAQ | Healthcare |
| MDW split history Midway Gold Corp (USA) | NYSEMKT | Basic Materials |
| MDWD split history Mediwound Ltd | NASDAQ | Healthcare |
| MDXG split history MiMedx Group Inc | NASDAQ | Healthcare |
| MDZ split history MDS Inc. (USA) | NYSE | Healthcare |
| ME split history Mariner Energy, Inc. | NYSE | Energy |
| MEA split history Metalico, Inc. | NYSEMKT | Basic Materials |
| MEAD split history Meade Instruments Corp. | NASDAQ | Healthcare |
| MEAS split history Measurement Specialties, Inc. | NASDAQ | Industrials |
| MED split history Medifast Inc | NYSE | Non-Cyclical Consumer Goods & Services |
| MEDQ split history MedQuist Inc. | NASDAQ | Technology |
| MEDW split history Mediware Info. Systems | NASDAQ | Technology |
| MEE split history Massey Energy Company | NYSE | Energy |
| MEET split history MeetMe Inc | NASDAQ | Technology |
| MEG split history Media General, Inc. | NYSE | Industrials |
| MEI split history Methode Electronics Inc. | NYSE | Industrials |
| MEIP split history MEI Pharma Inc | NASDAQ | Healthcare |
| MELA split history MELA Sciences Inc | NASDAQ | Healthcare |
| MELI split history Mercadolibre Inc | NASDAQ | Technology |
| MEMP split history Memorial Production Partners LP | NASDAQ | Energy |
| MEMS split history MEMSIC, INC. | NASDAQ | Technology |
| MEN split history Blackrock MuniEnhanced Fund Inc. | NYSE | Financials |
| MEND split history Micrus Endovascular Corporation | NASDAQ | Healthcare |
| MENT split history Mentor Graphics Corp | NASDAQ | Technology |
| MEOH split history Methanex Corporation (USA) | NASDAQ | Basic Materials |
| MEP split history Midcoast Energy Partners LP | NYSE | Energy |
| MERC split history Mercer International Inc. | NASDAQ | Basic Materials |
| MERR split history Merriman Curhan Ford Group, Inc. | NASDAQ | Financials |
| MERU split history Meru Networks, Inc. | NASDAQ | Telecommunications Services |
| MET split history Metlife Inc | NYSE | Financials |
| METR split history Metro Bancorp Inc | NASDAQ | Financials |
| MF split history MF Global Holdings Ltd | NYSE | Financials |
| MFA split history MFA Financial, Inc. | NYSE | Financials |
| MFB split history Maidenform Brands, Inc. | NYSE | Cyclical Consumer Goods & Services |
| MFC split history Manulife Financial Corporation (USA) | NYSE | Financials |
| MFD split history Macquarie/First Trust Global Infrstrctre | NYSE | Financials |
| MFE split history McAfee, Inc. | NYSE | Technology |
| MFG split history Mizuho Financial Group Inc. (ADR) | NYSE | Financials |
| MFI split history MicroFinancial Incorporated | NASDAQ | Financials |
| MFL split history BlackRock MuniHolding Insured Investm | NYSE | Financials |
| MFLR split history Mayflower Bancorp Inc. | NASDAQ | Financials |
| MFLX split history Multi-Fineline Electronix, Inc. | NASDAQ | Technology |
| MFM split history MFS Municipal Income Trust | NYSE | Financials |
| MFN split history Minefinders Corp. Ltd. (USA) | AMEX | Basic Materials |
| MFNC split history Mackinac Financial Corporation | NASDAQ | Financials |
| MFRI split history MFRI, Inc. | NASDAQ | Industrials |
| MFRM split history Mattress Firm Holding Corp | NASDAQ | Cyclical Consumer Goods & Services |
| MFSF split history MutualFirst Financial, Inc. | NASDAQ | Financials |
| MFT split history BlackRock MuniYield Insured Investment | NYSE | Financials |
| MFV split history MFS Special Value Trust | NYSE | Financials |
| MFW split history M & F Worldwide Corp. | NYSE | Services |
| MG split history Mistras Group Inc | NYSE | Technology |
| MGA split history Magna International Inc. (USA) | NYSE | Cyclical Consumer Goods & Services |
| MGAM split history Multimedia Games Holding Company Inc | NASDAQ | Cyclical Consumer Goods & Services |
| MGCD split history MGC Diagnostics Corp | NASDAQ | Healthcare |
| MGEE split history MGE Energy, Inc. | NASDAQ | Utilities |
| MGF split history MFS Government Markets Income Trust | NYSE | Financials |
| MGH split history Minco Gold Corporation (USA) | NYSEMKT | Basic Materials |
| MGI split history Moneygram International Inc | NASDAQ | Industrials |
| MGIC split history Magic Software Enterprises Ltd. | NASDAQ | Technology |
| MGLN split history Magellan Health Inc | NASDAQ | Healthcare |
| MGM split history MGM Resorts International | NYSE | Cyclical Consumer Goods & Services |
| MGN split history Mines Management, Inc. | NYSEMKT | Basic Materials |
| MGNX split history MacroGenics Inc | NASDAQ | Healthcare |
| MGPI split history MGP Ingredients Inc | NASDAQ | Non-Cyclical Consumer Goods & Services |
| MGRC split history McGrath RentCorp | NASDAQ | Financials |
| MGS split history MetroGAS S.A. (ADR) | NYSE | Utilities |
| MGT split history MGT Capital Investments Inc. | NYSEMKT | Healthcare |
| MGU split history Macquarie Global Infr Total Rtrn Fnd Inc | NYSE | Financials |
| MGYR split history Magyar Bancorp, Inc. | NASDAQ | Financials |
| MHD split history BlackRock MuniHoldings Fund Inc. | NYSE | Financials |
| MHF split history Western Asset Municipal Hgh Incm Fnd Inc | NYSE | Financials |
| MHFI split history McGraw Hill Financial Inc | NYSE | Industrials |
| MHGC split history Morgans Hotel Group Co. | NASDAQ | Cyclical Consumer Goods & Services |
| MHH split history Mastech Holdings, Inc. | NYSEMKT | Industrials |
| MHI split history Pioneer Municipal High Income Trust | NYSE | Financials |
| MHK split history Mohawk Industries, Inc. | NYSE | Cyclical Consumer Goods & Services |
| MHLD split history Maiden Holdings, Ltd. | NASDAQ | Financials |
| MHM split history Masonite International Corp | NYSEARCA | Industrials |
| MHN split history Blackrock Muniholdings New York Qulty Fd | NYSE | Financials |
| MHO split history M/I Homes Inc | NYSE | Cyclical Consumer Goods & Services |
| MHP split history Mcgraw-Hill Companies Inc | NYSE | Services |
| MHR split history Magnum Hunter Resources Corp | NYSE | Energy |
| MHS split history Medco Health Solutions Inc. | NYSE | Healthcare |
| MHY split history Western Asset Managed High Incm Fnd Inc. | NYSE | Financials |
| MI split history Marshall & Ilsley Corporation | NYSE | Financials |
| MIC split history Macquarie Infrastructure Company LLC | NYSE | Industrials |
| MICC split history Millicom International Cellular SA (USA) | NASDAQ | Services |
| MICT split history Micronet Enertec Technologies Inc | NASDAQ | Industrials |
| MIDD split history The Middleby Corporation | NASDAQ | Cyclical Consumer Goods & Services |
| MIE split history Cohen & Strs MLP Inc & Ergy Oprty Fd Inc | NYSE | Financials |
| MIFI split history Novatel Wireless Inc | NASDAQ | Technology |
| MIG split history Meadowbrook Insurance Group, Inc. | NYSE | Financials |
| MIGP split history Mercer Insurance Group, Inc. | NASDAQ | Financials |
| MIK split history Michaels Companies Inc | NASDAQ | Cyclical Consumer Goods & Services |
| MIL split history MFC Industrial Ltd | NYSE | Financials |
| MILL split history Miller Energy Resources Inc | NYSE | Energy |
| MIM split history MI Developments Inc. (USA) | NYSE | Services |
| MIN split history MFS Intermediate Income Trust | NYSE | Financials |
| MIND split history Mitcham Industries, Inc. | NASDAQ | Energy |
| MINI split history Mobile Mini Inc | NASDAQ | Industrials |
| MIPI split history Molecular Insight Pharmaceuticals, Inc. | NASDAQ | Healthcare |
| MIPS split history MIPS Technologies, Inc. | NASDAQ | Technology |
| MIR split history Mirant Corporation | NYSE | Utilities |
| MITI split history Micromet Inc. | NASDAQ | Healthcare |
| MITK split history Mitek Systems, Inc. | NASDAQ | Technology |
| MITL split history Mitel Networks Corp | NASDAQ | Technology |
| MITSY split history Mitsui & Co., Ltd. (ADR) | NASDAQ | Industrials |
| MITT split history AG Mortgage Investment Trust Inc | NYSE | Financials |
| MIW split history Eaton Vance Michigan Municipal Bond Fund | NYSEMKT | Financials |
| MIXT split history MiX Telematics Ltd - ADR | NYSE | Technology |
| MIY split history Blackrock Muniyield Michign Qulty Fd Inc | NYSE | Financials |
| MJI split history BlackRock MuniYield New Jersey Insured | NYSE | Financials |
| MJN split history Mead Johnson Nutrition CO | NYSE | Non-Cyclical Consumer Goods & Services |
| MKC split history McCormick & Company, Incorporated | NYSE | Non-Cyclical Consumer Goods & Services |
| MKC-V split history McCormick & Company, Incorporated | NYSE | Non-Cyclical Consumer Goods & Services |
| MKL split history Markel Corporation | NYSE | Financials |
| MKSI split history MKS Instruments, Inc. | NASDAQ | Industrials |
| MKTAY split history Makita Corporation (ADR) | NASDAQ | Cyclical Consumer Goods & Services |
| MKTG split history Responsys Inc | NASDAQ | Technology |
| MKTO split history Marketo Inc | NASDAQ | Technology |
| MKTX split history MarketAxess Holdings Inc. | NASDAQ | Financials |
| MLAB split history Mesa Laboratories, Inc. | NASDAQ | Industrials |
| MLHR split history Herman Miller, Inc. | NASDAQ | Industrials |
| MLI split history Mueller Industries, Inc. | NYSE | Industrials |
| MLM split history Martin Marietta Materials, Inc. | NYSE | Basic Materials |
| MLNK split history ModusLink Global Solutions, Inc. | NASDAQ | Technology |
| MLNX split history Mellanox Technologies, Ltd. | NASDAQ | Technology |
| MLP split history Maui Land & Pineapple Co. | NYSE | Non-Cyclical Consumer Goods & Services |
| MLR split history Miller Industries, Inc. | NYSE | Cyclical Consumer Goods & Services |
| MLVF split history Malvern Federal Bancorp, Inc. | NASDAQ | Financials |
| MM split history Millennial Media, Inc. | NYSE | Cyclical Consumer Goods & Services |
| MMAC split history MMA Capital Management LLC | NASDAQ | Financials |
| MMC split history Marsh & McLennan Companies, Inc. | NYSE | Financials |
| MMD split history Mainstay Definedterm Municipal Opptys Fd | NYSE | Financials |
| MMG split history Metalline Mining Company | AMEX | Basic Materials |
| MMI split history Marcus & Millichap Inc | NYSE | Financials |
| MMLP split history Martin Midstream Partners L.P. | NASDAQ | Industrials |
| MMM split history 3M Co | NYSE | Industrials |
| MMP split history Magellan Midstream Partners, L.P. | NYSE | Energy |
| MMR split history Mcmoran Exploration Co | NYSE | Energy |
| MMS split history MAXIMUS, Inc. | NYSE | Industrials |
| MMSI split history Merit Medical Systems, Inc. | NASDAQ | Healthcare |
| MMT split history MFS Multimarket Income Trust | NYSE | Financials |
| MMU split history Western Asset Managed Municipals Fnd Inc | NYSE | Financials |
| MMUS split history MakeMusic, Inc. | NASDAQ | Technology |
| MMYT split history MakeMyTrip Limited | NASDAQ | Technology |
| MN split history Manning and Napier Inc | NYSE | Financials |
| MNDL split history Mandalay Digital Group Inc | NASDAQ | Technology |
| MNDO split history MIND C.T.I. Ltd. | NASDAQ | Technology |
| MNE split history BlackRock Muni New York Intr. Dur. Fnd. | NYSE | Financials |
| MNGA split history MagneGas Corporation | NASDAQ | Energy |
| MNGLU split history Blue Wolf Mongolia Holdings Corp | NASDAQ | Financials |
| MNI split history The McClatchy Company | NYSE | Cyclical Consumer Goods & Services |
| MNK split history Mallinckrodt PLC | NYSE | Healthcare |
| MNKD split history MannKind Corporation | NASDAQ | Healthcare |
| MNOV split history MediciNova, Inc. | NASDAQ | Healthcare |
| MNP split history Western Asset Municipal Partners Fnd Inc | NYSE | Financials |
| MNR split history Monmouth R.E. Inv. Corp. | NYSE | Financials |
| MNRK split history Monarch Financial Holdings, Inc. | NASDAQ | Financials |
| MNRO split history Monro Muffler Brake Inc | NASDAQ | Cyclical Consumer Goods & Services |
| MNST split history Monster Beverage Corp | NASDAQ | Non-Cyclical Consumer Goods & Services |
| MNTA split history Momenta Pharmaceuticals, Inc. | NASDAQ | Healthcare |
| MNTG split history MTR Gaming Group Inc | NASDAQ | Cyclical Consumer Goods & Services |
| MNTX split history Manitex International, Inc. | NASDAQ | Industrials |
| MO split history Altria Group Inc | NYSE | Non-Cyclical Consumer Goods & Services |
| MOBI split history Sky-mobi Ltd (ADR) | NASDAQ | Cyclical Consumer Goods & Services |
| MOBL split history Mobileiron Inc | NASDAQ | Technology |
| MOC split history Command Security Corporation | NYSEMKT | Industrials |
| MOCO split history MOCON, Inc. | NASDAQ | Industrials |
| MOD split history Modine Manufacturing Co. | NYSE | Cyclical Consumer Goods & Services |
| MODN split history Model N Inc | NYSE | Technology |
| MOFG split history MidWestOne Financial Group, Inc. | NASDAQ | Financials |
| MOG-A split history Moog Inc | NYSE | Industrials |
| MOG-B split history Moog Inc | NYSE | Industrials |
| MOH split history Molina Healthcare, Inc. | NYSE | Healthcare |
| MOKO split history Moko Social Media Ltd (ADR) | NASDAQ | Telecommunications Services |
| MOLG split history MOL Global Inc | NASDAQ | Industrials |
| MOLX split history Molex Incorporated | NASDAQ | Industrials |
| MOLXA split history Molex Incorporated | NASDAQ | Industrials |
| MON split history Monsanto Company | NYSE | Non-Cyclical Consumer Goods & Services |
| MONT split history Montage Technology Group Ltd | NASDAQ | Technology |
| MORN split history Morningstar, Inc. | NASDAQ | Industrials |
| MOS split history Mosaic Co | NYSE | Basic Materials |
| MOSY split history MoSys Inc. | NASDAQ | Technology |
| MOT split history Motorola, Inc. | NYSE | Technology |
| MOV split history Movado Group, Inc | NYSE | Cyclical Consumer Goods & Services |
| MOVE split history Move Inc. | NASDAQ | Financials |
| MPA split history BlackRock MuniYield Pennsylvania Insured | NYSE | Financials |
| MPAA split history Motorcar Parts of America, Inc. | NASDAQ | Cyclical Consumer Goods & Services |
| MPAC split history MOD-PAC CORP. | NASDAQ | Basic Materials |
| MPB split history Mid Penn Bancorp, Inc. | NASDAQ | Financials |
| MPC split history Marathon Petroleum Corp | NYSE | Energy |
| MPEL split history Melco Crown Entertainment Ltd (ADR) | NASDAQ | Cyclical Consumer Goods & Services |
| MPET split history Magellan Petroleum Corporation | NASDAQ | Energy |
| MPG split history Mpg Office Trust Inc | NYSE | Services |
| MPLX split history MPLX LP | NYSE | Energy |
| MPO split history Midstates Petroleum Company Inc | NYSE | Energy |
| MPR split history Met-Pro Corporation | NYSE | Industrials |
| MPV split history Babson Capital Participation Investors | NYSE | Financials |
| MPW split history Medical Properties Trust, Inc. | NYSE | Financials |
| MPWR split history Monolithic Power Systems, Inc. | NASDAQ | Technology |
| MPX split history Marine Products Corp. | NYSE | Cyclical Consumer Goods & Services |
| MQT split history Blackrock Muniyield Quality Fund II Inc. | NYSE | Financials |
| MQY split history Blackrock Muniyield Quality Fund Inc. | NYSE | Financials |
| MR split history Mindray Medical International Ltd (ADR) | NYSE | Healthcare |
| MRC split history MRC Global Inc | NYSE | Energy |
| MRCC split history Monroe Capital Corp | NASDAQ | Financials |
| MRCY split history Mercury Systems Inc | NASDAQ | Technology |
| MRD split history Memorial Resource Development Corp | NASDAQ | Energy |
| MRF split history American Income Fund, Inc. | NYSE | Financials |
| MRGE split history Merge Healthcare Inc. | NASDAQ | Healthcare |
| MRH split history Montpelier Re Holdings Ltd. | NYSE | Financials |
| MRIN split history Marin Software Inc | NYSE | Technology |
| MRK split history Merck & Co., Inc. | NYSE | Healthcare |
| MRKT split history Markit Ltd | NASDAQ | Industrials |
| MRLN split history Marlin Business Services Corp. | NASDAQ | Financials |
| MRNA split history MDRNA, Inc. | NASDAQ | Healthcare |
| MRNS split history Marinus Pharmaceuticals Inc | NASDAQ | Healthcare |
| MRO split history Marathon Oil Corporation | NYSE | Energy |
| MROE split history Monroe Bancorp | NASDAQ | Financials |
| MRT split history Morton's Restaurant Group, Inc. | NYSE | Services |
| MRTN split history Marten Transport, Ltd | NASDAQ | Industrials |
| MRVC split history MRV Communications, Inc. | NASDAQ | Technology |
| MRVL split history Marvell Technology Group Ltd. | NASDAQ | Technology |
| MRX split history Medicis Pharmaceutical Corporation | NYSE | Healthcare |
| MS split history Morgan Stanley | NYSE | Financials |
| MSA split history Mine Safety Appliances | NYSE | Healthcare |
| MSB split history Mesabi Trust | NYSE | Financials |
| MSBF split history MSB Financial Corp. | NASDAQ | Financials |
| MSCC split history Microsemi Corporation | NASDAQ | Technology |
| MSCI split history Msci Inc | NYSE | Industrials |
| MSD split history Morgan Stanley Emerging Markets Debt | NYSE | Financials |
| MSEX split history Middlesex Water Company | NASDAQ | Utilities |
| MSF split history Morgan Stanley Emerging Markets Fund Inc | NYSE | Financials |
| MSFG split history MainSource Financial Group Inc. | NASDAQ | Financials |
| MSFT split history Microsoft Corporation | NASDAQ | Technology |
| MSG split history The Madison Square Garden Co | NASDAQ | Cyclical Consumer Goods & Services |
| MSI split history Motorola Solutions Inc | NYSE | Technology |
| MSII split history Media Sciences International | NASDAQ | Basic Materials |
| MSK split history Morgan Stanley Capital Trust VIII | NYSE | Financials |
| MSL split history MidSouth Bancorp, Inc. | NYSE | Financials |
| MSLI split history Merus Labs International Inc (USA) | NASDAQ | Healthcare |
| MSM split history MSC Industrial Direct Co Inc | NYSE | Industrials |
| MSN split history Emerson Radio Corp | NYSEMKT | Technology |
| MSO split history Martha Stewart Living Omnimedia, Inc. | NYSE | Cyclical Consumer Goods & Services |
| MSON split history Misonix, Inc. | NASDAQ | Healthcare |
| MSP split history Madison Strategic Sector Premium Fund | NYSE | Financials |
| MSPD split history Mindspeed Technologies, Inc. | NASDAQ | Technology |
| MSSR split history McCormick & Schmick's Seafood Restaurant | NASDAQ | Services |
| MSTR split history MicroStrategy Incorporated | NASDAQ | Technology |
| MSTX split history Mast Therapeutics Inc | NYSEMKT | Healthcare |
| MSW split history Mission West Properties, Inc. | NASDAQ | Services |
| MSY split history Invesco High Yield Inv Fund | NYSE | Financials |
| MT split history ArcelorMittal SA (ADR) | NYSE | Basic Materials |
| MTA split history Magyar Telekom Plc. (ADR) | NYSE | Services |
| MTB split history M&T Bank Corporation | NYSE | Financials |
| MTBC split history Medical Transcription Billing Corp | NASDAQ | Healthcare |
| MTD split history Mettler-Toledo International Inc. | NYSE | Industrials |
| MTDR split history Matador Resources Co | NYSE | Energy |
| MTE split history Mahanagar Telephone Nigam Limited (ADR) | NYSE | Services |
| MTEX split history Mannatech, Inc. | NASDAQ | Non-Cyclical Consumer Goods & Services |
| MTG split history MGIC Investment Corp. | NYSE | Financials |
| MTGE split history American Capital Mortgage Investment Crp | NASDAQ | Financials |
| MTH split history Meritage Homes Corp | NYSE | Cyclical Consumer Goods & Services |
| MTL split history Mechel OAO (ADR) | NYSE | Basic Materials |
| MTLK split history Metalink Ltd. | NASDAQ | Technology |
| MTLS split history Materialise NV (ADR) | NASDAQ | Technology |
| MTN split history Vail Resorts, Inc. | NYSE | Cyclical Consumer Goods & Services |
| MTOR split history Meritor Inc | NYSE | Cyclical Consumer Goods & Services |
| MTOX split history MEDTOX Scientific, Inc. | NASDAQ | Healthcare |
| MTP split history MLP & Strategic Equity Fund Inc | NYSE | Financials |
| MTR split history Mesa Royalty Trust | NYSE | Energy |
| MTRN split history Materion Corp | NYSE | Basic Materials |
| MTRX split history Matrix Service Co | NASDAQ | Energy |
| MTS split history Montgomery Street Income Securities Inc. | NYSE | Financials |
| MTSC split history MTS Systems Corporation | NASDAQ | Industrials |
| MTSI split history M/A-COM Technology Solutions Holdings | NASDAQ | Technology |
| MTSL split history MER Telemanagement Solutions Ltd. | NASDAQ | Technology |
| MTSN split history Mattson Technology, Inc. | NASDAQ | Industrials |
| MTT split history Western Asset Municipal D Opp Trust Inc. | NYSE | Financials |
| MTU split history Mitsubishi UFJ Financial Group Inc (ADR) | NYSE | Financials |
| MTW split history Manitowoc Company, Inc. | NYSE | Industrials |
| MTX split history Minerals Technologies Inc | NYSE | Basic Materials |
| MTXX split history Matrixx Initiatives, Inc. | NASDAQ | Healthcare |
| MTZ split history MasTec, Inc. | NYSE | Industrials |
| MU split history Micron Technology, Inc. | NASDAQ | Technology |
| MUA split history Blackrock Muniassets Fund, Inc. | NYSE | Financials |
| MUC split history Blackrock MuniHoldings CA Insrd Fnd Inc. | NYSE | Financials |
| MUE split history Blackrock Muniholdings Insured Fund II | NYSE | Financials |
| MUH split history Blackrock Muniholdings Fund II Inc. | NYSE | Financials |
| MUI split history Blackrock Muni Intermediate Drtn Fnd Inc | NYSE | Financials |
| MUJ split history BlackRock MuniHoldings New Jersey Ins Fn | NYSE | Financials |
| MUR split history Murphy Oil Corporation | NYSE | Energy |
| MUS split history Blackrock MuniHoldings Insured Fd Inc. | NYSE | Financials |
| MUSA split history Murphy USA Inc | NYSE | Energy |
| MUX split history McEwen Mining Inc | NYSE | Basic Materials |
| MVC split history MVC Capital, Inc. | NYSE | Financials |
| MVF split history BlackRock MuniVest Fund Inc. | NYSEMKT | Financials |
| MVG split history MAG Silver Corp (USA) | NYSEMKT | Basic Materials |
| MVIS split history Microvision, Inc. | NASDAQ | Technology |
| MVNR split history Mavenir Systems Inc | NYSE | Technology |
| MVO split history MV Oil Trust | NYSE | Energy |
| MVT split history Blackrock Munivest Fund II Inc. | NYSE | Financials |
| MW split history The Men's Wearhouse, Inc. | NYSE | Cyclical Consumer Goods & Services |
| MWA split history Mueller Water Products, Inc. | NYSE | Industrials |
| MWE split history Markwest Energy Partners LP | NYSE | Energy |
| MWIV split history MWI Veterinary Supply, Inc. | NASDAQ | Non-Cyclical Consumer Goods & Services |
| MWRX split history Mergeworthrx Corp | NASDAQ | Healthcare |
| MWV split history MeadWestvaco Corp. | NYSE | Basic Materials |
| MWW split history Monster Worldwide, Inc. | NYSE | Industrials |
| MX split history Magnachip Semiconductor Corp | NYSE | Technology |
| MXB split history MSCI Inc. | NYSE | Financials |
| MXC split history Mexco Energy Corporation | NYSEMKT | Energy |
| MXE split history Mexico Equity and Income Fund | NYSE | Financials |
| MXF split history Mexico Fund Inc. | NYSE | Financials |
| MXIM split history Maxim Integrated Products Inc. | NASDAQ | Technology |
| MXL split history MaxLinear, Inc. | NYSE | Technology |
| MXT split history Maxcom Telecomunic S.A.B. de C.V. (ADR) | NYSE | Telecommunications Services |
| MXWL split history Maxwell Technologies Inc. | NASDAQ | Industrials |
| MY split history China Ming Yang Wind Power Group Ltd | NYSE | Industrials |
| MYC split history BlackRock MuniYield California Fund Inc. | NYSE | Financials |
| MYCC split history ClubCorp Holdings Inc | NYSE | Cyclical Consumer Goods & Services |
| MYD split history Blackrock Muniyield Fund Inc. | NYSE | Financials |
| MYE split history Myers Industries, Inc. | NYSE | Basic Materials |
| MYF split history BlackRock MuniYield Investment Fund | NYSE | Financials |
| MYGN split history Myriad Genetics, Inc. | NASDAQ | Healthcare |
| MYI split history Blackrock Muniyield Insured Fund Inc. | NYSE | Financials |
| MYJ split history BlackRock MuniYield New Jersey Fund, Inc | NYSE | Financials |
| MYL split history Mylan Inc | NASDAQ | Healthcare |
| MYM split history BlackRock Muniyield Michigan Ins. Fnd II | NYSE | Financials |
| MYN split history BlackRock MuniYield New York Insured Fnd | NYSE | Financials |
| MYOS split history MYOS Corp | NASDAQ | Non-Cyclical Consumer Goods & Services |
| MYRG split history MYR Group Inc | NASDAQ | Industrials |
| MYRX split history Myriad Pharmaceuticals Inc | NASDAQ | Healthcare |
| MZF split history Managed Duration Invtmt Grd Mun Fund | NYSE | Financials |
| MZOR split history Mazor Robotics Ltd - ADR | NASDAQ | Healthcare |