Result:

magna carta records (usa)

malaco records (usa)

mammoth records (usa)

mapleshade productions (usa)

market square records (uk)

matador records (usa)

merge records (usa)

metal blade records (usa)

minor music (germany)

minty fresh (usa)

mobile fidelity sound lab (usa)

mosaic records (usa)

music & arts (usa)

mute (uk)