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Ordnance Survey Limited
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Orduna Plumbing
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Orea Mining
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Oregon Entertainment
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Oregon Public Employees Retirement System
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Ore-Ida (part of Kraft Heinz)
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O'Reilly Auto Enterprises LLC
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Organic Milk Suppliers Co-Operative Limited
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Organico Realfoods
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Organi Group
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Organimax
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Organised Group Limited
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Organix Brands Ltd
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Organización Ardila Lülle
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Orica Limited
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Oricon Coast Luxury Resort
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Oriel Gold (part of Inner Mongolia Zhouji Mining)
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Oriental Crest
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Oriental Land
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Oriental Motor Co., Ltd.
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Oriental Ressources Congo
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Oriental Timber
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Oriental Vision Mining Philippines Corp
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Oriental Weavers