Metalodic Records

Canada

Metalopolis Promotion

Bosnia and Herzegovina

Metalother Records

United-Kingdom

Metalpesado Producciones

unknown

MetalPriest Records

Bolivia

MetalPunxRex

Germany

MetalruleZ Productions (MZ Prod)

Poland

Metalside Production

unknown

Metalstorm Productions

Germany

Metalstorm Records

Poland

Metalstrom Recordings

USA

Metalsucks

USA

Metaltifus Productions

Bolivia

Metaluna Productions

France

Metalúrgica Mococa

unknown

Metaluxor

Italy

Metalville

Germany

Metalvoice

Germany

Metalwerx Muzik

unknown

MetalWorks Records

United-Kingdom

Metalworld

Switzerland

Metamorphik Productions

India

Metamorphos

unknown

Metanoia Records

unknown

Metaphor Records

unknown

Metastation

unknown

Metavania Music

USA

Metech Recordings

United-Kingdom

Meteor

Switzerland

Meteora Records

unknown

MeteorCity

USA

Meteorite

unknown

Meth Media Records

unknown

Methedras Recordings

unknown

Methorn Records

unknown

Metical Records

unknown

Metnica Records

Venezuela

Metro

United-Kingdom

Metro 1 Music

unknown

Metro City Records

unknown

Metro Doubles

United-Kingdom

Metro One Records

unknown

Metro-Som

Unknown

Metrobeat

USA

Metrodiscos

Portugal

Metrodrive

unknown

Metrognome

United-Kingdom

Metronome Musik

Germany

Metroplex

unknown

Metropole Records

Brazil

Metropolis Records

USA

Metropolist Müzik

unknown

Metropolitan State Productions

USA

Metropolitana

unknown

Metta

Germany

Mettallex Music

Luxembourg

Meurtre Noir Records

Canada

Meuse Music Records

Belgium

Mexican Cut

France

Mexican Steel Prods

Mexico

Mexico Barbaro Records (MB Records)

Mexico

Meziprostor

Czechia

MF Records

France

MFG (Music Factory Group)

Ukraine

MFL Records (Moscow Funeral League)

Russia

MFN

unknown

MFO

unknown

MFT Records

unknown

MG Records

Poland

MGA

Thailand

Mganga Records

Tanzania

MGI Records

Germany

MGM Records

USA

MGP Records

United-Kingdom

MGR Music Entertainment

United-Kingdom

MH Productions

Unknown

MHM Recordings

USA

MHOTR

USA

Mi Agüela No Tiene Brazos Producciones

Spain

MI-5 Records

unknown

Mia Mind Music

unknown

MIA Records

USA

Miami Records

unknown

Miaou Miaou Musique

Canada

Miasma Of Barbarity

Portugal

Miasma Records

Portugal

MIB Music

unknown

Miceli Records

Netherlands

Micetrap Records

USA

Micrec

Latvia

Micro Mix Records

USA

Micro Records (UK)

United-Kingdom

Micro Records (USA)

USA

Micro Train Music

Sweden

Micro Werks

USA

Microfome

Portugal

Microfon

Argentina

Microphone Records (Bootleg)

Italy

Microphonia Records

Serbia

Microphonic Meltdown

USA