The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 13201 | Oblivion | £ 75,985,020 | |
| 13202 | Obsolete | £ 55,457,606 | |
| 13203 | Obtuse | £ 14,379,095 | |
| 13204 | Obviously | £ 2,318,576,665 | |
| 13205 | Ocarina of Time | £ -1,574,201 | |
| 13206 | OCB inc | £ 6,320,804 | |
| 13207 | Occasional Tables | £ 5,328,203 | |
| 13208 | Ocean | £ 52,827,866 | |
| 13209 | Ocean Beach Club | £ 167,311,641 | |
| 13210 | Ocean Defence | £ 84,701,291 | |
| 13211 | ocean star | £ 3,580,849,318 | |
| 13212 | Oceanic Enterprises | £ -50,808 | |
| 13213 | Oceans 11 | £ 58,500,636 | |
| 13214 | Oceans 12 | £ 10,291,638 | |
| 13215 | Oceans 13 | £ 132,219,759 | |
| 13216 | Oceans Eleven | £ 8,485,684 | |
| 13217 | Ocelot | £ 194,460,230 | |
| 13218 | Och Noooo | £ 1,506,119 | |
| 13219 | Octavian | £ 4,631,188 | |
| 13220 | October 1066 | £ 190,371,851 | |
| 13221 | October 1854 | £ 54,019,404 | |
| 13222 | October 2014 | £ 94,385,046 | |
| 13223 | Octopia | £ 9,626,521 | |
| 13224 | Octopus Garden | £ 4,050,927 | |
| 13225 | Oddjob | £ 16,604,273 | |
| 13226 | Odds on Favorite | £ 74,346,727 | |
| 13227 | Oddysay | £ 2,896,867 | |
| 13228 | Odell | £ 13,714,064 | |
| 13229 | Oden | £ 641,394,649 | |
| 13230 | oden wrath | £ 1,735,842,850 | |
| 13231 | odin | £ 8,811,968 | |
| 13232 | Odin Mafia | £ 8,768,668 | |
| 13233 | Odin the Wanderer | £ 4,687,105 | |
| 13234 | Odo | £ 32,513,900 | |
| 13235 | Odqan | £ 428,689,804 | |
| 13236 | Odyssey | £ 329,493,997 | |
| 13237 | of a black widow | £ 196,069,515 | |
| 13238 | Of a Brutal Empire | £ 36,359,377 | |
| 13239 | of a Solar Empire | £ 46,660,163 | |
| 13240 | Of A Time | £ 23,423,343 | |
| 13241 | Of All Your Land | £ 48,121,892 | |
| 13242 | Of Bomb | £ 5,131,350 | |
| 13243 | of CFC | £ 5,455,120 | |
| 13244 | of Elm Street | £ 49,875 | |
| 13245 | Of Every Position | £ 61,887,884 | |
| 13246 | Of Friday the 13th | £ 50,000 | |
| 13247 | Of Green Bay | £ 7,216,016 | |
| 13248 | of Impendium | £ 349,441 | |
| 13249 | of Long Stockings | £ 16,738,335 | |
| 13250 | Of Minisotta | £ 1,716,607 | |
| 13251 | Of My Label | £ 295,911,481 | |
| 13252 | of of | £ 7,075,463 | |
| 13253 | of of of | £ 4,201,365 | |
| 13254 | of REASON | £ 1,154,429 | |
| 13255 | of RHC | £ 68,042,901 | |
| 13256 | Of Scotland | £ 1,304,795,018 | |
| 13257 | of the devil | £ 27,539,344 | |
| 13258 | of The Hat | £ 5,507,097 | |
| 13259 | of the heap | £ 66,771,581 | |
| 13260 | of the lost | £ 69,257,675 | |
| 13261 | of the monsters | £ 41,126,098 | |
| 13262 | Of The Road | £ 146,979,140 | |
| 13263 | of the runite | £ 4,694,589 | |
| 13264 | Of The UVF | £ 133,321,393 | |
| 13265 | Of the world | £ 2,007,785 | |
| 13266 | Of Time | £ 372,360,923 | |
| 13267 | of. | £ 335,457,109 | |
| 13268 | Ofcom | £ 320,664,180 | |
| 13269 | Off | £ 25,794,080 | |
| 13270 | off it | £ 5,261,275 | |
| 13271 | Offenbach | £ 382,674,581 | |
| 13272 | Offensive Behaviour | £ 509,861,247 | |
| 13273 | office | £ 625,164,230 | |
| 13274 | Offroad Trucker | £ 394,064,982 | |
| 13275 | Offshore | £ 367,643,133 | |
| 13276 | Offshore Accounts | £ 342,085,575 | |
| 13277 | Offshore Cash | £ 60,279,702 | |
| 13278 | og esaelP | £ 4,208,484 | |
| 13279 | ogkush | £ 2,491,394 | |
| 13280 | Ogrimmar | £ 35,379,515 | |
| 13281 | Oh Herro | £ 2,995,837 | |
| 13282 | Oh Jesus Christ | £ 9,142,153 | |
| 13283 | Oh No | £ 192,452,517 | |
| 13284 | Oh YEAH | £ 2,549,726 | |
| 13285 | ohara inc | £ -165,571 | |
| 13286 | ohe herrow | £ 5,703,509 | |
| 13287 | Ohnoitsmymothernlaw | £ 5,504,562 | |
| 13288 | Ohtaku inc | £ 3,600,029 | |
| 13289 | Ohtaku inc1 | £ 4,456,703 | |
| 13290 | Ohtaku inc2 | £ 1,267,353 | |
| 13291 | Ohtaku inc3 | £ 4,191,984 | |
| 13292 | Ohtaku inc4 | £ 4,118,968 | |
| 13293 | ohyesyesh | £ 50,000 | |
| 13294 | Oil | £ 833,968,470 | |
| 13295 | Oil CONGLOMO | £ 2,646,845 | |
| 13296 | Oil Field | £ 271,568 | |
| 13297 | Oil Inc | £ 1,596,655 | |
| 13298 | Oil Industry | £ 4,441,721 | |
| 13299 | Oil Rigger | £ 2,151,587,047 | |
| 13300 | Oilfield Industries | £ 9,854,297 | |
