- U & I Entertainment Limited
- U&I
- U&I Entertainment
- UBI Soft
- Ubi Soft Entertainment Software
- ubik
- Ubiquiti
- Ubiquiti Networks
- Ubisoft
- Ubisoft (UBITP)
- UBISOFT EMEA
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- Ubisoft Spain
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- Ubisoft, Blue Byte, Keen Games
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- Uk Ltd Nintendo
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- ultimea
- ULTIZER
- Ultrasone
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- Umidigi
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- Unbranded
- UNDC
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- unique eyes
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- United Soft Media Verlag GmbH
- United Software
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- Universal
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- Universal Interactive
- Universal Music
- Universal Studio Canal Video
- Université De Paix (Namur Belgique)
- University Games
- University Of California Press
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- Uniwa
- Unknown
- Unknwon
- UNO
- Unplug
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- Urban Arrow
- URBAN COMICS
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- UrChoiceLtd
- Ursula K. Le Guin
- Uru-Chan
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- USAopoly
- Usborne
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- Usm
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