| M | 10 | 1979 - 1982 |
| M + M | 2 | 1986 |
| M + M (O/k/a Martha And The Muffins) | 1 | 1984 |
| M - Robin Scott | 2 | 1982 |
| M Efekt | 1 | 1978 |
| M People | 1 | 1993 |
| M S G | 1 | 1992 |
| M-1 Alternative | 1 | 1991 |
| M-80 | 1 | 1984 |
| M-G-M Studio Orchestra And Chorus Conducted By André Previn | 1 | 1955 |
| M-G-M Studio Orchestra Conducted By André Previn | 2 | 1958 |
| The M-Zee Band | 1 | 1981 |
| M. A. Numminen | 8 | 1970 - 2014 |
| M. A. Numminen Ja Jani Uhleniuksen Orkesteri | 1 | 1970 |
| M. Ashraf | 2 | 2009 |
| M. Ashraf : Nahid Akhtar : Ahmed Rushdi | 1 | 2009 |
| M. Ashraf : Nahid Akhtar : Mehdi Hassan : Tafo Bros | 1 | 2009 |
| M. Efekt | 1 | 1979 |
| M. Frog | 1 | 1973 |
| M. Fusciati (G. Iacoucci / M. Vinciguerra) | 1 | 2016 |
| M. G. Boulter | 1 | 2013 |
| M. Jones Band | 1 | 1987 |
| M. Joyce Ponsot | 1 | 1960 |
| M. Shariff And The Zurah | 1 | |
| M. Walking On The Water | 2 | 1988 - 1989 |
| M. Ward | 8 | 2005 - 2016 |
| M. A. Numminen, Sinikka Sokka Ja Seppo Hovi | 1 | 1977 |
| M.A.R.S | 1 | 1987 |
| M.C. Hammer | 5 | 1990 - 1991 |
| M.C. Shan | 1 | 1987 |
| The M.G.'s | 2 | 1973 |
| The M.G.M. Orchestra Dir. Macklin Marrow | 1 | 1956 |
| M.G.M. Studio Orchestra | 1 | 1966 |
| M.G.V. "Harmonie" Bensheim | 1 | |
| The M.S.R. Singers | 1 | 1969 |
| M/A/R/R/S | 1 | 1988 |
| M7 Strict Dance Tempo Orchestra | 1 | 1974 |
| M83 | 2 | 2003 - 2011 |
| Ma Banlieue Flasque | 1 | 1979 |
| Ma Jesus Y Su Acordeon | 1 | 1981 |
| Ma Rainey | 9 | 1953 - 1985 |
| Maad | 1 | 1976 |
| Maajun | 1 | 1969 |
| Maarit | 2 | 1975 - 2014 |
| Maarten Peters | 1 | 1989 |
| Maastricht Salon Orchestra, André Rieu | 1 | 1985 |
| De Maasvogels | 1 | 1971 |
| Mabel | 4 | 1977 - 1978 |
| Mabel Joy | 2 | 1975 - 1976 |
| Mabel Mercer | 6 | 1952 - 1969 |
| Mabel Mercer And Bobby Short | 1 | 1969 |
| Mabel Scott | 1 | 1984 |
| Mabumi Yamaguchi Quartet | 1 | 2022 |
| The Mabuses | 1 | 1991 |
| Mac And Katie Kissoon | 11 | 1971 - 1978 |
| Mac Band Featuring The McCampbell Brothers | 1 | |
| Mac Beattie And His Melodiers | 1 | |
| Mac Beattie And The Ottawa Valley Melodiers | 1 | |
| Mac Curtis | 12 | 1968 - 2011 |
| Mac Curtis And Revelation | 1 | 1977 |
| Mac Davis | 45 | 1970 - 1986 |
| Mac DeMarco | 1 | 2017 |
| Mac Gant And The Tennessee Dewdrops | 2 | |
| Mac Gayden | 3 | 1976 |
| Mac Gayden And Skyboat | 1 | 1976 |
| Mac Kissoon | 2 | 1970 - 1979 |
| Mac Martin And The Dixie Travelers | 1 | 1987 |
| Mac McAnally | 5 | 1977 - 1988 |
| Mac Murrough | 3 | 1973 - 1977 |
| Mac Odell | 2 | 1977 - 1978 |
| Mac Strittmatter's Dixielanders | 1 | 1958 |
| Mac Taple | 2 | 1980 - 1985 |
| Mac Wiseman | 15 | 1960 - 1988 |
| Mac-11 | 1 | 2023 |
| Mac-Kac And His French Rock And Roll | 1 | 1957 |
| Mac-Kac Et Son Rock And Roll | 1 | 1956 |
| MacAlpine, Aldridge, Rock, Sarzo | 1 | 1986 |
| MacBain's Scottish Country Dance Band | 1 | 1969 |
| The Macc Lads | 6 | 1985 - 1991 |
| The MacDonald Folk Group | 1 | 1968 |
| The MacDonald Sisters | 3 | 1969 - 1977 |
| The MacDougall Girls Pipe Band | 2 | 1963 |
| Mace | 1 | 1985 |
| Maceo | 2 | 1974 - 1988 |
| Maceo And All The King's Men | 1 | 1988 |
| Machanic Manyeruke And The Puritans | 1 | 1989 |
| Machiavel | 5 | 1978 - 1981 |
| Machiel Grobler | 3 | 1978 - 1981 |
| Machiel Grobler Met Koor | 1 | 1978 |
| Machinations | 2 | 1983 - 1986 |
| The Machine Gun Co. With Mike Cooper | 1 | 1972 |
| Machine [Netherlands] | 1 | 1970 |
| The Machines | 1 | 1982 |
| Machito | 18 | 1949 - 1984 |
| Machito And His Afro-Cuban Jazz Ensemble | 1 | 1959 |
| Machito And His Afro-Cuban Orchestra | 2 | 1957 - 1959 |
| Machito And His Orchestra | 11 | 1953 - 1966 |
| Machito And His Salsa Big Band | 3 | 1982 - 1984 |
| Macho | 3 | 1978 - 1980 |
| Machucambos | 1 | 1977 |
| Los Machucambos | 41 | 1960 - 1980 |
| MacIver Hine | 1 | 1972 |
| Mack Allen Smith | 3 | 1975 - 1980 |
| Mack And The Boys | 1 | 1989 |
| Mack Browne And The Brothers | 2 | 1971 |
| Mack Porter | 1 | 2006 |
| Mack Sanders And His Swing Band | 1 | 1964 |
| Mack Stevens | 3 | 2013 - 2023 |
| Mack Stevens And His Groove Boys | 1 | 2013 |
| Mack Stevens And His In The Groove Boys | 1 | 2022 |
| Macka B | 1 | 2015 |
| The MacKenzie Serenaders | 1 | |
| Macklin Marrow Conducts The MGM Orchestra | 1 | |
| Macklin Marrow Y Su Orquesta | 1 | |
| Macko Palmer | 1 | 1975 |
| MacLean And MacLean | 6 | 1974 - 1983 |
| The Macnish Distillery Pipe Band | 1 | 1976 |
| Macondo | 1 | 1972 |
| Macy Gray | 1 | 2019 |
| Mad | 1 | 1972 |
| Mad Butcher | 1 | 1985 |
| Mad Daddys | 2 | 1985 - 1996 |
| Mad Daddy’s | 1 | 1985 |
| Mad Dog Cole | 1 | 2015 |
| Mad Jocks And Englishmen | 1 | 1975 |
| The Mad Lads | 6 | 1966 - 1990 |
| Mad Matt Kotovuori | 2 | 2010 - 2013 |
| Mad Max | 3 | 1984 - 1987 |
| Mad Professor | 2 | 1988 - 2022 |
| Mad Professor And Channel One Sound System | 1 | 2016 |
| Mad Professor And Mad Era | 1 | 2022 |
| Mad River | 5 | 1968 - 1986 |
| Mad Scene | 1 | 2012 |
| The Mad Scene | 2 | 1995 - 2012 |
| Mad Season | 1 | 2013 |
| The Mad Show (Original Cast) | 1 | 1966 |
| Mad Sin | 2 | 1988 - 2005 |
| Mad Skillz | 2 | 1996 |
| Mădălina Manole | 1 | 1991 |
| The Madam / The Prince | 1 | 1972 |
| Madam I'm Adam | 1 | 1988 |
| Madame George | 1 | 1977 |
| Madcats | 1 | 1978 |
| Madder Rose | 1 | 1993 |
| Maddox | 1 | 1979 |
| Maddox Bros. And Rose | 7 | 1959 - 1985 |
| Maddox Brothers And Rose | 16 | 1953 - 1987 |
| Maddy Prior | 21 | 1971 - 1990 |
| Maddy Prior And June Tabor | 3 | 1976 - 1977 |
| Maddy Prior And Rick Kemp | 1 | 1990 |
| Maddy Prior And The Answers | 1 | 1983 |
| The Maddy Prior Band | 2 | 1982 |
| Maddy Prior With The Carnival Band | 1 | 1987 |
| Made In Brasil | 1 | 1984 |
| Made In Sweden | 1 | 1970 |
| Made In U.S.A. | 1 | 1977 |
| Madeleine | 1 | 1979 |
| Madeleine Grey | 2 | 1958 - 1974 |
| Madeleine Marks | 1 | 1981 |
| Madeline Bell | 10 | 1967 - 1976 |
| Madhouse | 5 | 1983 - 1987 |
| Madhouse [Sweden] | 1 | 1983 |
| Madison Dyke | 1 | 1977 |
| Madleen Kane | 5 | 1978 - 1981 |
| Madmess | 1 | 2021 |
| MadneS | 2 | 2021 |
| Madness | 101 | 1979 - 2022 |
| The Madness | 4 | 1988 - 2022 |
| Mado Robin | 4 | 1958 - 1968 |
| Mado Robin, Michel Dens, Liliane Berton, Pierre Germain, Solange Michel, Louis Noguera | 1 | 1960 |
| Mado Robin, Michel Dens, Yvette Barthélémy, Michel Sénéchal, Huguette Boulangeot, Daniel Marty, Jacques Pruvost | 1 | |
| Madonna | 82 | 1983 - 2022 |
| Madonna And Otto Von Wernherr | 1 | 1989 |
| Madrigal | 2 | 1970 - 1971 |
| Madrigalchor Klagenfurt | 1 | |
| Los Madrugadores | 1 | 1983 |
| Madura | 1 | 1971 |
| Mae McKenna | 6 | 1975 - 1977 |
| Mae Moore | 1 | 1990 |
| Mae Questel With Milt Moss | 1 | 1969 |
| Mae West | 15 | 1955 - 1987 |
| Mae West, W.C. Fields | 1 | 1970 |
| Maelstrom | 1 | 1990 |
| Maestro (Cecil Hume) | 1 | 1976 |
| The Maestro's All Steel Band | 1 | 1968 |
| Maestros | 1 | 1990 |
| The Maewestmen | 1 | 1989 |
| Maffitt And Davies | 1 | 1968 |
| Maffitt/Davies | 1 | 1968 |
| Magali Noël | 2 | 1980 - 2002 |
| Magazin | 9 | 1982 - 1991 |
| Magazine | 29 | 1978 - 2018 |
| Magda Van Biljon, Karel En Sarel, Petrus Padda En Eend, Bennie Boekwurm En Die Kouse | 1 | 1981 |
| Magdalen College School | 1 | 1978 |
| Magdaléna Hajóssyová, Věra Soukupová, Jozef Kundlák, Peter Mikuláš, Slovak Philharmonic Choir And Orchestra | 1 | 1989 |
| Magdalena Leonides Andrasic And Ansambl Donat Iz Zadra | 1 | 1980 |
| Magdalith | 1 | |
| Magdeburgarna | 3 | 1971 - 1976 |
| Magenta | 1 | 1978 |
| Maggie And Terre Roche | 2 | 1975 - 1981 |