- M & O Music
- M.Ward Records
- M10
- Mac's Record Label
- Mad Minute
- Mad Oak
- Made To Measure
- Madfish
- Madrona
- Magaibutsu
- Magic Bullet
- Magnetic Field
- Magnetic Field ; Yep Roc
- Magpie
- Majora
- Majordomo
- Make Up
- Makoto
- Maldoror
- Malicious Country
- Malicious Damage
- Malicious Vinyl
- Mammoth
- Man At The Off Licence / Calypso Now
- Man's Ruin
- Manic Depression
- Manifesto
- Manimal Vinyl
- Manqué Music
- Mantra
- Mantra Spenta - Sacrament II
- Maple Death
- MapleMusic
- Marathon Artists
- MarDev
- Marina
- Martha's Music
- Mascot
- MASQ
- Massacre
- Masterplan
- Masters At Paradise
- Matador
- Matador / Pop Noire
- Matador Records
- Matinée
- Maverick
- Maze
- MCA
- McQueen
- Mecanique Populaire
- Medicine Jar
- Megaforce
- Megaforce / 13th Planet
- Megaphone
- Mego
- Melankolic
- Melankolik
- Mello Music Group
- Melodic
- Mélodies Massacre
- Memphis
- Memphis Industries
- Merciful Release
- Mercury
- Merge
- Merge Records
- Merge/Bella Union
- Merzbau
- Metak
- Metal Blade
- MeteorCity
- Metoo!
- Metric Music International
- Metric Music International / BMG
- Metro Triples
- Metropolis
- Meudiademorte
- Mexican Summer
- Mia
- Michel Cloup Self Release
- Microbe Records
- Microcultures
- Microqlima
- Mid-Fi
- Midnight
- Midnight Music
- Midnight Special
- Mighty Music
- Milan
- Milan Music
- Militia
- Milk!
- Mill Pond
- Mille Milliards
- Millenium Pro
- Mimicry
- Mind Expansion
- Minority
- Mint
- Mint Films
- Minty Fresh
- Mis
- Mis Ojos Discos
- Misanthropy
- Misfits
- Misra
- Misra/Talitres
- Missing Link
- Mistletone
- MK Label
- MNarsitik
- Mo' Wax
- Moderbolaget
- Moderne Musik Tonträger
- Modular
- Modulor
- MoFoCo
- Moi J'Connais
- Mom + Pop
- Mon Cul C'est Du Tofu? / Rejuvenation
- Mondo Media
- Monika
- Monika Entreprise
- Monitor
- Monkeywrench
- Mono-Tone
- Monopsone
- Monotreme
- Montauk
- MontyRay
- Moonage Rebel
- Moonfog
- Moonlee
- Mordgrimm
- More Alarming
- More DPM
- Morgan Creek
- Morningside
- Morr Music
- Mort Aux Vaches
- Mortal / Cooking Vinyl
- Mosaic Music
- Moshi Moshi
- Mother Tongue
- Motive Sounds Recordings
- Motor Music
- Moumkine Music
- Mr Lady
- Mr. Bongo
- Msi
- Munster
- Murailles Music
- Murailles Music - Africantape - Kythibong - Herzfeld
- Murmur
- Musea
- Mush
- Mushroom
- Mushroom Pillow
- Music Cartel
- Music Fear Satan
- Music For Nations
- Music From Memory
- Music Related
- Music70
- Musical Tragedies
- MusicFearSatan
- Musidisc
- Mut
- Mute
- Mute / Sire / Reprise
- Mute Cryptic Corporation
- Mute, [PIAS]
- MVG
- My Animal House
- My Dad
- My Favorite Robot
- My First Sonny Weismuller Recordings
- My Little Cab
- Myth America