Huge European company, which takes care of releasing of classical music of different epochs: medieval times, renaissance, baroque, romantism and modern academic music.
Also Harmonia Mundi has great number of sub-labels – jazz ones: Label Bleu, Hat Art, Candid, CMP; classical ones: Calliope, Mandala; and folk ones as well: Opus, Indigo.
Hat Art – the most famous company in avant-garde improvisation jazz. Here you can find composition jazz as Vienna Art Orchestra, free jazz A.Braxton, chamber avant-garde John Cage.
Label Bleu – French jazz label. There are Michel Portal, Louis Sclavis, Richard Galliano etc albums in its catalogue. 
CMP - Creative Music Productions – up-to-date composition jazz and jazz rock performed by D.Torn, A.Summers, J.Bruce, T.Gurtu, M.Karn and many others.