| Company | Based in | Founded | Industry |
|---|---|---|---|
| U.S. Gold | Birmingham | 1984 | — |
| Ubisoft Annecy | Annecy | 1996 | video game industry |
| Ubisoft Blue Byte | Düsseldorf | October 1988 | video game industry |
| Ubisoft Casablanca | Casablanca | April 1998 | video game industry |
| Ubisoft Chengdu | Chengdu | September 2007 | video game industry |
| Ubisoft Kyiv | Kyiv | 2008 | video game industry |
| Ubisoft Leamington | Leamington Spa | 2002 | — |
| Ubisoft Milan | Milan | 1998 | video game industry |
| Ubisoft Mumbai | Mumbai | October 2018 | — |
| Ubisoft Nagoya | Aichi Prefecture | September 1996 | — |
| Ubisoft Pune | Pune | 2008 | video game industry |
| Ubisoft Quebec | Quebec City | 2005 | video game industry |
| Ubisoft Romania | Bucharest | 1992 | video game industry |
| Ubisoft Toronto | Toronto | 2009 | video game industry |
| Ukiyo Publishing | London | 2017 | — |
| Ultimate Play the Game | Ashby-de-la-Zouch | 1982 | — |
| Ultra Games | Buffalo Grove | 1988 | video game industry |
| Ultrasoft | Bratislava | 1989 | video game industry |
| Un Je Ne Sais Quoi | Bègles | May 11, 2018 | video game industry |
| Unalis | Zhongshan District | December 2, 1976 | — |
| Undead Labs | Seattle | November 23, 2009 | video game industry |
| Underground Development | Redwood Shores | 1994 | video game industry |
| Unexpected Studio | Montpellier | November 2015 | — |
| Unique Development Studios | Norrköping | 1993 | video game industry |
| United Kingdom | — | December 6, 1921 | — |
| Universomo | Tampere | 2002 | video game industry |
| Unties | — | — | video game industry |
| Uphill Games | — | — | — |
| Upside Studios | Malmö | March 15, 2001 | video game industry |
| Urnique Studio | — | — | video game industry |
| Ustwo Games | — | — | — |
| UTV Ignition Games | Essex | 2002 | video game industry |