The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 15001 | Oblivion | £ 75,985,020 | |
| 15002 | Oblock | £ 30,442,233 | |
| 15003 | Obsidian Destroyer | £ 37,727,784 | |
| 15004 | Obsolete | £ 55,457,606 | |
| 15005 | Obtuse | £ 14,379,095 | |
| 15006 | Obviously | £ 2,318,576,665 | |
| 15007 | Ocarina of Time | £ -1,574,201 | |
| 15008 | OCB inc | £ 6,320,804 | |
| 15009 | Occasional Tables | £ 5,328,203 | |
| 15010 | Ocean | £ 52,827,866 | |
| 15011 | Ocean Beach Club | £ 966,115,757 | |
| 15012 | Ocean Defence | £ 384,014,293 | |
| 15013 | ocean star | £ 3,580,849,318 | |
| 15014 | Oceanic Enterprises | £ -50,808 | |
| 15015 | Oceans 11 | £ 58,500,636 | |
| 15016 | Oceans 12 | £ 10,291,638 | |
| 15017 | Oceans 13 | £ 132,219,759 | |
| 15018 | Oceans Eleven | £ 8,485,684 | |
| 15019 | Ocelot | £ 194,460,230 | |
| 15020 | Och Noooo | £ 1,506,119 | |
| 15021 | Octavian | £ 4,631,188 | |
| 15022 | October 1066 | £ 81,732,927 | |
| 15023 | October 1854 | £ 290,795,624 | |
| 15024 | October 2014 | £ 94,385,046 | |
| 15025 | Octopia | £ 9,626,521 | |
| 15026 | Octopus Garden | £ 4,050,927 | |
| 15027 | Oddjob | £ 16,604,273 | |
| 15028 | Odds and ends | £ 118,726,051 | |
| 15029 | Odds on Favorite | £ 74,346,727 | |
| 15030 | Oddysay | £ 2,896,867 | |
| 15031 | Odell | £ 13,714,064 | |
| 15032 | Oden | £ 641,394,649 | |
| 15033 | oden wrath | £ 1,735,842,850 | |
| 15034 | odin | £ 8,811,968 | |
| 15035 | Odin Mafia | £ 8,768,668 | |
| 15036 | Odin the Wanderer | £ 4,687,105 | |
| 15037 | Odo | £ 32,513,900 | |
| 15038 | Odqan | £ 151,624,104 | |
| 15039 | Odyssey | £ 329,493,997 | |
| 15040 | of a black widow | £ 196,069,515 | |
| 15041 | Of a Brutal Empire | £ 36,359,377 | |
| 15042 | of a Solar Empire | £ 46,660,163 | |
| 15043 | Of A Time | £ 27,824,181 | |
| 15044 | Of All Your Land | £ 48,121,892 | |
| 15045 | Of Bomb | £ 5,131,350 | |
| 15046 | of CFC | £ 5,455,120 | |
| 15047 | Of Every Position | £ 61,887,884 | |
| 15048 | Of Friday the 13th | £ 50,000 | |
| 15049 | of Impendium | £ 349,441 | |
| 15050 | of Long Stockings | £ 16,738,335 | |
| 15051 | Of My Label | £ 367,377,610 | |
| 15052 | Of new dawn | £ 37,616,589 | |
| 15053 | of of | £ 7,075,463 | |
| 15054 | of REASON | £ 1,154,429 | |
| 15055 | of RHC | £ 68,042,901 | |
| 15056 | Of Scotland | £ 1,304,795,018 | |
| 15057 | Of The Boards | £ 14,794,127 | |
| 15058 | of the devil | £ 27,539,344 | |
| 15059 | of The Hat | £ 5,507,097 | |
| 15060 | of the heap | £ 66,771,581 | |
| 15061 | of the lost | £ 69,257,675 | |
| 15062 | of the monsters | £ 41,126,098 | |
| 15063 | Of The Road | £ 146,979,140 | |
| 15064 | of the runite | £ 4,694,589 | |
| 15065 | Of The UVF | £ 133,321,393 | |
| 15066 | Of the world | £ 2,007,785 | |
| 15067 | of. | £ 335,457,109 | |
| 15068 | Ofcom | £ 306,858,410 | |
| 15069 | Off | £ 25,794,080 | |
| 15070 | Off His Trolly | £ 10,806,044 | |
| 15071 | off it | £ 5,261,275 | |
| 15072 | Offenbach | £ 382,674,581 | |
| 15073 | Offender | £ 106,885,704 | |
| 15074 | Offensive Behaviour | £ 509,861,247 | |
| 15075 | Offensive Security | £ 196,897,168 | |
| 15076 | Official Location | £ 179,832,369 | |
| 15077 | OfflineTV | £ 56,600,622 | |
| 15078 | Offroad Trucker | £ 82,349,736 | |
| 15079 | Offshore Accounts | £ 1,458,878 | |
| 15080 | Offshore Cash | £ 60,279,702 | |
| 15081 | Offshore Trading Company | £ 5,141,246 | |
| 15082 | og esaelP | £ 4,208,484 | |
| 15083 | ogkush | £ 2,491,394 | |
| 15084 | Ogrimmar | £ 35,379,515 | |
| 15085 | Oh Herro | £ 2,995,837 | |
| 15086 | Oh Jesus Christ | £ 9,142,153 | |
| 15087 | Oh No | £ 118,214,150 | |
| 15088 | Oh YEAH | £ 2,549,726 | |
| 15089 | ohara inc | £ -165,571 | |
| 15090 | ohe herrow | £ 5,703,509 | |
| 15091 | Ohms | £ 357,653,881 | |
| 15092 | Ohnoitsmymothernlaw | £ 5,504,562 | |
| 15093 | Ohtaku inc | £ 3,600,029 | |
| 15094 | Ohtaku inc1 | £ 4,456,703 | |
| 15095 | Ohtaku inc2 | £ 1,267,353 | |
| 15096 | Ohtaku inc3 | £ 4,191,984 | |
| 15097 | Ohtaku inc4 | £ 4,118,968 | |
| 15098 | ohyesyesh | £ 50,000 | |
| 15099 | Oil | £ 833,968,470 | |
| 15100 | Oil CONGLOMO | £ 2,646,845 | |
