Marvel Music Motion

unknown

Marvelous Entertainment

Japan

Marwolaeth Records

United-Kingdom

März

unknown

Mas Kina Recordings

Norway

MAS Records (Mighty Atom Smash

United-Kingdom

Masakari

unknown

Mascara Drama

unknown

Maschinenwelt Records

Germany

Mascom Records

Serbia

Mascot Records

Netherlands

Masculin Records

Norway

MASD Records

Italy

Masduk Records

unknown

Mask Of The Slave Records

Romania

MASK Records

Japan

Masked Dead Records

Italy

Masmorra Independent

Brazil

Masochismo Records

unknown

Masochrist

unknown

Mason Music

unknown

Mason Records

unknown

Masonic Records

Germany

Masque Records (BRA)

Brazil

Masque Records (USA)

USA

Masquerad

unknown

Masquerade Recordings

USA

Mass Catharsis Productions

Czechia

Mass Cremation Entertainment

USA

Mass Deadening

Canada

Mass Descention Records

unknown

Mass Grave Records

unknown

Mass Movement Records

USA

Mass Murder Inc Records

Italy

Mass Productions

France

Mass Raging

unknown

Mass Records

unknown

Mass Suicide Society Conspiracy

Germany

Massacre Records

Germany

Massacre Video

USA

Massacro Records

Italy

Massattack Records

unknown

Massive Bloodshed Records

Germany

Massive Core Records

United-Kingdom

Massive Groove Productions

unknown

Massive Records

Chile

Massive Rock Records

Japan

Massive Sound Recordings

Bulgaria

Massive Studios

unknown

Massproduktion

Sweden

Master

United-Kingdom

Master Class Music

unknown

Master Company

unknown

Master Disk

unknown

Master Machine Music

Colombia

Master Metal

unknown

Master Nocturnal Records

Brazil

Master Of All Evil

Portugal

Master Of Disharmony Records

unknown

Master Of Metal

Slovenia

Master Records (RUS)

Russia

Master Records (USA)

USA

Master Records Productions

Colombia

Master Rock Records

Germany

Master Tone

unknown

Master-Turun Kasettituotanto

unknown

Mastercult Records

Mexico

Masterful Records

Poland

Mastermind Records

Denmark

Masterpiece Distribution

Italy

Masterplan

Germany

Masterport

Japan

Masters

Netherlands

Masters Of Kaos

Mexico

Masters Of Kaos Productions

Colombia

Masters Of Mayhem And Noise

unknown

Masters Of Metal Productions

USA

Mastersound

USA

Mastertoaster Recordings

Spain

Mastertracks

Germany

Mastervox

Finland

Masterworks

unknown

Mastodon Infantry

USA

Mastodon Records

unknown

MAT Records

Mexico

Mata Hari Enterprises

Germany

Mata Records

unknown

Matador

unknown

Matador Records

USA

Matapadre Discográfica

Spain

Matasellos

Spain

Matchbox

unknown

Matching Head

unknown

Matchless Records

USA

Matchtown Records

Sweden

Matek Records

Russia

Mater Tenebrarum

Slovenia

Materiali Musicali

Italy

Mathematics Recordings

USA

Matière Noire

unknown