| Artist | Title | Format | ||||
| The Occasion | Cannery Hours | Album | ||||
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| Odd Nosdam | Level Live Wires | Album | ||||
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| Of Montreal | Hissing Fauna, Are You The Destroyer? | Album | ||||
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| One More Grain | Isle Of Grain | Album | ||||
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| OneRepublic | Dreaming Out Loud | Album | ||||
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| oodBooks | Turn It Back | Single | ||||
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| Operator Please | Yes Yes Vindictive | Album | ||||
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| The Ordinary Boys | How To Get Everything You Ever Wanted In Ten Ea... | Album | ||||
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| Original Silence | The First Original Silence | Album | ||||
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| Orson | Bright Idea Mercury | Album | ||||
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| Oscillation | New Way To Feel | Single | ||||
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| Ost & Kjex | How To Not Be A Biscuit | Single | ||||
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| Outkast | Idlewild | Album | ||||
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| OutKast | The Mighty O | Single | ||||
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| Output | Nebulae | Album | ||||
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| Oxbow | The Narcotic Story | Album | ||||
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| The Oxfam Glamour Models | Kick Out the Grams/Postmodern Stars | Single | ||||
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