M
- Mann
- Mastodon
- Matt Mason (Warner Bros. Nashville)
- Meek Mill (Maybach Music Group/Warner Bros.)
- MIKA (FMR/Warner Bros.)
- MC Solaar
- Jessi Malay
- The Mars Volta
- Christian McBride
- Brian McKnight
- The Mean Reds (Record Collection/Warner Bros.)
- Brad Mehldau
- Mêlée
- Idina Menzel
- Metallica (US/Canada)
- Kylie Minogue (FMR/Warner Bros.)
- Elliot Minor
- Chad Mitchell
- Heidi Montag
- MizzyAir
- Mt. Egypt (Record Collection/Warner Bros.)
- Murs (Record Collection/Warner Bros.)
- Muse
- Noodle/ Lil Whoady
- MUTEMATH
- Missy Higgins
- My Chemical Romance
Read more about this topic: List Of Current Warner Bros. Records Artists