Katalog wytwórni
- One Day Music
- One Eyed Jacks
- One Fifteen
- One Fine Day
- One House
- One Hundred
- One Instrument
- One Life Production
- One Little Independent
- One Little Indian
- One Little Victory Records
- One Louder
- One Love Rec
- One Music
- One Note
- One Riot Records
- One Road Records
- One Root
- One Two
- One Velvet Winter
- One Way Static
- One Way Street
- One World
- One World Records
- Onecead Entertainment
- Onecolorrecord
- Onefourall Music
- Onephatdiva
- Ones and Zeros
- Oneul Entertainment
- Ongaku
- Ongakusha Co. Ltd.
- Ongehoord
- Onion
- Onion Boy
- Onloveclub
- Only 4 Music
- Only Blues
- Only Cuts
- Only Fit For the Bin Records
- Only In Dreams
- Only Music
- Only Pro
- Only Seven Left
- Onlyroots
- Onmind
- Onomatopoeia
- Onyx
- Onyx Classics
- Onze Heure Onze
- Oob
- Ooberman
- Ooh Sounds
- Ookami Koubou
- Oona
- Oonops Drops
- Oort
- Opal Tapes
- Open All Nite
- Open Doek Approved
- Open Road
- Open Sky
- Opera
- Opera D'oro
- Opera Rara
- Operation
- Operation Unknown
- Ophir Gospel
- Opia Community
- Opilec
- Opiniao
- Opsa Deheli
- Optic Nerve
- Optimo
- Optimum
- Optimumm
- Optimus
- Optshop
- Opus 3
- Opus Arte
- Oqpo Records
- Or
- Ora
- Ora Fonogram
- Oracle Sound
- Orange
- Orange Band
- Orange Dance Company
- Orange Egg
- Orange Fight
- Orange Mountain
- Orange Pop
- Orange Sky
- Orange Twin
- Orange World
- Orangefield
- Orangle
- Orb Records
- Orbit
- Orca Music
