The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 16001 | Oahu | £ 41,514,431 | |
| 16002 | Oak | £ 122,713,318 | |
| 16003 | Oak Island | £ 163,037,134 | |
| 16004 | Oak Leaf Enterprise | £ 14,945,592 | |
| 16005 | oakford lodge | £ 97,001,570 | |
| 16006 | Oakland | £ 55,582,086 | |
| 16007 | Oakmont | £ 7,933,164 | |
| 16008 | OakWorld Enterprises | £ 15,885,491 | |
| 16009 | Oasis | £ 107,322,768 | |
| 16010 | Oasis of the Seas | £ 216,020,159 | |
| 16011 | Oats | £ 66,324,070 | |
| 16012 | OB2 | £ 12,755,887 | |
| 16013 | OB3 | £ 14,269,280 | |
| 16014 | OB4 | £ 15,665,305 | |
| 16015 | OB5 | £ 9,012,088 | |
| 16016 | Obama | £ 42,809,903 | |
| 16017 | Obar Ardair | £ 387,490,277 | |
| 16018 | Obble | £ 466,184,526 | |
| 16019 | obedience | £ 479,226,860 | |
| 16020 | Obese American | £ 161,429,557 | |
| 16021 | Obi-Wan Kenobi | £ 1,614,845,855 | |
| 16022 | Obi-Wan-Kenobi | £ 100,953,209 | |
| 16023 | Object in Motion | £ 106,865,438 | |
| 16024 | Objective Reality | £ 5,693,910 | |
| 16025 | Obliteration | £ 366,355,730 | |
| 16026 | Obliteration Is Coming | £ 146,477,916 | |
| 16027 | Obliterator | £ 5,501,753 | |
| 16028 | Oblivion | £ 75,985,020 | |
| 16029 | Oblivious | £ 5,503,920 | |
| 16030 | Obsession | £ 4,141,059 | |
| 16031 | Obsidian | £ 5,952,122 | |
| 16032 | Obsidian Destroyer | £ 5,567,314 | |
| 16033 | Obsolete | £ 55,457,606 | |
| 16034 | Obtuse | £ 14,379,095 | |
| 16035 | ObusPrimeLLC | £ 331,884 | |
| 16036 | Obviously | £ 2,318,576,665 | |
| 16037 | Ocarina of Time | £ -1,574,201 | |
| 16038 | OCB inc | £ 6,320,804 | |
| 16039 | Occasional Tables | £ 5,328,203 | |
| 16040 | Ocean | £ 52,827,866 | |
| 16041 | Ocean Beach Club | £ 1,210,658,026 | |
| 16042 | Ocean Defence | £ 410,756,819 | |
| 16043 | ocean star | £ 3,580,849,318 | |
| 16044 | Oceanic Enterprises | £ -50,808 | |
| 16045 | Oceans 11 | £ 58,500,636 | |
| 16046 | Oceans 12 | £ 10,291,638 | |
| 16047 | Oceans 13 | £ 132,219,759 | |
| 16048 | Oceans Eleven | £ 8,485,684 | |
| 16049 | Ocelot | £ 194,460,230 | |
| 16050 | Och Noooo | £ 1,506,119 | |
| 16051 | Octavian | £ 4,631,188 | |
| 16052 | October 1066 | £ 81,732,927 | |
| 16053 | October 1854 | £ 290,795,624 | |
| 16054 | October 2014 | £ 94,385,046 | |
| 16055 | Octopia | £ 9,626,521 | |
| 16056 | Octopus Garden | £ 4,050,927 | |
| 16057 | Odd Things | £ 31,973,073 | |
| 16058 | Oddjob | £ 16,604,273 | |
| 16059 | Odds and ends | £ 158,908,557 | |
| 16060 | Odds on Favorite | £ 74,346,727 | |
| 16061 | Oddysay | £ 2,896,867 | |
| 16062 | Oden | £ 641,394,649 | |
| 16063 | oden wrath | £ 1,735,842,850 | |
| 16064 | odin | £ 8,811,968 | |
| 16065 | Odin Mafia | £ 8,768,668 | |
| 16066 | Odin the Wanderer | £ 4,687,105 | |
| 16067 | Odo | £ 32,513,900 | |
| 16068 | Odqan | £ 188,512,804 | |
| 16069 | Odyssey | £ 334,944,633 | |
| 16070 | of a black widow | £ 198,590,624 | |
| 16071 | Of a Brutal Empire | £ 36,359,377 | |
| 16072 | of a Solar Empire | £ 46,660,163 | |
| 16073 | Of A Time | £ 27,824,181 | |
| 16074 | Of All Your Land | £ 48,121,892 | |
| 16075 | of Belfast | £ 59,148,696 | |
| 16076 | Of Bomb | £ 5,131,350 | |
| 16077 | of CFC | £ 5,455,120 | |
| 16078 | Of Every Position | £ 61,887,884 | |
| 16079 | Of Friday the 13th | £ 50,000 | |
| 16080 | of Impendium | £ 349,441 | |
| 16081 | Of My Label | £ 367,377,610 | |
| 16082 | of my secrets | £ 262,770,978 | |
| 16083 | of of | £ 7,075,463 | |
| 16084 | of of of of of of of of | £ 50,000 | |
| 16085 | of REASON | £ 1,154,429 | |
| 16086 | of RHC | £ 68,042,901 | |
| 16087 | Of Scotland | £ 1,304,795,018 | |
| 16088 | Of The Boards | £ 14,794,127 | |
| 16089 | of the devil | £ 27,539,344 | |
| 16090 | of The Hat | £ 5,507,097 | |
| 16091 | of the heap | £ 66,771,581 | |
| 16092 | of the lost | £ 69,257,675 | |
| 16093 | of the monsters | £ 41,126,098 | |
| 16094 | Of The Road | £ 146,979,140 | |
| 16095 | of the runite | £ 4,694,589 | |
| 16096 | Of The UVF | £ 133,321,393 | |
| 16097 | Of the world | £ 2,007,785 | |
| 16098 | of. | £ 335,457,109 | |
| 16099 | Ofcom | £ 306,858,410 | |
| 16100 | Off | £ 29,813,873 | |
