The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 13001 | Obviously | £ 2,318,576,665 | |
| 13002 | Ocarina of Time | £ -1,574,201 | |
| 13003 | OCB inc | £ 6,320,804 | |
| 13004 | Occasional Tables | £ 5,328,203 | |
| 13005 | Ocean | £ 52,827,866 | |
| 13006 | Ocean Beach Club | £ 84,735,150 | |
| 13007 | Ocean Defence | £ 84,719,353 | |
| 13008 | ocean star | £ 3,580,849,318 | |
| 13009 | Oceanic Enterprises | £ -50,808 | |
| 13010 | Oceans 11 | £ 58,500,636 | |
| 13011 | Oceans 12 | £ 10,291,638 | |
| 13012 | Oceans 13 | £ 132,219,759 | |
| 13013 | Oceans Eleven | £ 8,485,684 | |
| 13014 | Ocelot | £ 194,460,230 | |
| 13015 | Och Noooo | £ 1,506,119 | |
| 13016 | Octavian | £ 4,631,188 | |
| 13017 | October 2014 | £ 94,385,046 | |
| 13018 | Octopia | £ 9,626,521 | |
| 13019 | Octopus Garden | £ 4,050,927 | |
| 13020 | Oddjob | £ 16,604,273 | |
| 13021 | Odds on Favorite | £ 74,346,727 | |
| 13022 | Oddysay | £ 2,896,867 | |
| 13023 | Odell | £ 13,714,064 | |
| 13024 | Oden | £ 641,394,649 | |
| 13025 | oden wrath | £ 1,735,842,850 | |
| 13026 | odin | £ 8,811,968 | |
| 13027 | Odin Mafia | £ 8,768,668 | |
| 13028 | Odin the Wanderer | £ 4,687,105 | |
| 13029 | Odo | £ 32,513,900 | |
| 13030 | Odqan | £ 401,689,804 | |
| 13031 | Odyssey | £ 329,493,997 | |
| 13032 | of a black widow | £ 196,069,515 | |
| 13033 | Of a Brutal Empire | £ 36,359,377 | |
| 13034 | of a Solar Empire | £ 46,660,163 | |
| 13035 | Of All Your Land | £ 48,121,892 | |
| 13036 | Of Bomb | £ 5,131,350 | |
| 13037 | of CFC | £ 5,455,120 | |
| 13038 | of Elm Street | £ 49,875 | |
| 13039 | Of Every Position | £ 61,887,884 | |
| 13040 | Of Friday the 13th | £ 50,000 | |
| 13041 | Of Green Bay | £ 7,216,016 | |
| 13042 | of Impendium | £ 349,441 | |
| 13043 | of Long Stockings | £ 16,738,335 | |
| 13044 | Of Minisotta | £ 1,716,607 | |
| 13045 | Of My Label | £ 295,911,481 | |
| 13046 | of of | £ 7,075,463 | |
| 13047 | of of of | £ 4,201,365 | |
| 13048 | of REASON | £ 1,154,429 | |
| 13049 | of RHC | £ 68,042,901 | |
| 13050 | Of Scotland | £ 1,304,795,018 | |
| 13051 | of the devil | £ 27,539,344 | |
| 13052 | of The Hat | £ 5,507,097 | |
| 13053 | of the heap | £ 66,771,581 | |
| 13054 | of the lost | £ 69,257,675 | |
| 13055 | of the monsters | £ 41,126,098 | |
| 13056 | Of The Road | £ 146,979,140 | |
| 13057 | of the runite | £ 4,694,589 | |
| 13058 | Of The UVF | £ 133,321,393 | |
| 13059 | Of the world | £ 2,007,785 | |
| 13060 | Of Time | £ 372,360,923 | |
| 13061 | of. | £ 335,457,109 | |
| 13062 | Ofcom | £ 320,664,180 | |
| 13063 | Off | £ 25,794,080 | |
| 13064 | off it | £ 5,261,275 | |
| 13065 | Offenbach | £ 382,674,581 | |
| 13066 | Offensive Behaviour | £ 509,861,247 | |
| 13067 | office | £ 671,053,756 | |
| 13068 | Offroad Trucker | £ 384,266,913 | |
| 13069 | Offshore | £ 367,643,133 | |
| 13070 | Offshore Accounts | £ 188,167,244 | |
| 13071 | Offshore Cash | £ 60,279,702 | |
| 13072 | og esaelP | £ 4,208,484 | |
| 13073 | ogkush | £ 2,491,394 | |
| 13074 | Ogrimmar | £ 35,379,515 | |
| 13075 | Oh Herro | £ 2,995,837 | |
| 13076 | Oh Jesus Christ | £ 9,142,153 | |
| 13077 | Oh No | £ 192,452,517 | |
| 13078 | Oh YEAH | £ 2,549,726 | |
| 13079 | ohara inc | £ -165,571 | |
| 13080 | ohe herrow | £ 5,703,509 | |
| 13081 | Ohnoitsmymothernlaw | £ 5,504,562 | |
| 13082 | Ohtaku inc | £ 3,600,029 | |
| 13083 | Ohtaku inc1 | £ 4,456,703 | |
| 13084 | Ohtaku inc2 | £ 1,267,353 | |
| 13085 | Ohtaku inc3 | £ 4,191,984 | |
| 13086 | Ohtaku inc4 | £ 4,118,968 | |
| 13087 | ohyesyesh | £ 50,000 | |
| 13088 | Oil | £ 833,968,470 | |
| 13089 | Oil CONGLOMO | £ 2,646,845 | |
| 13090 | Oil Field | £ 271,568 | |
| 13091 | Oil Inc | £ 1,596,655 | |
| 13092 | Oil Industry | £ 4,441,721 | |
| 13093 | Oil Rigger | £ 2,151,587,047 | |
| 13094 | Oilfield Industries | £ 9,854,297 | |
| 13095 | oiu | £ 5,498,037 | |
| 13096 | OJ da Juiceman | £ 109,855 | |
| 13097 | OK Tom | £ 213,436,455 | |
| 13098 | OKFurniture | £ 50,000 | |
| 13099 | OKG Shed | £ -329,334 | |
| 13100 | OKS 1 PTE LTD | £ 50,000 | |
