The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 12301 | Oak Island | £ 150,452,433 | |
| 12302 | Oak Leaf Enterprise | £ 14,945,592 | |
| 12303 | oakford lodge | £ 59,640,561 | |
| 12304 | Oakland | £ 55,582,086 | |
| 12305 | OakWorld Enterprises | £ 15,885,491 | |
| 12306 | Oar | £ 52,411,144 | |
| 12307 | Oasis | £ 107,322,768 | |
| 12308 | Oasis of the Seas | £ 216,020,159 | |
| 12309 | Oats | £ 66,324,070 | |
| 12310 | OB2 | £ 12,755,887 | |
| 12311 | OB3 | £ 14,269,280 | |
| 12312 | OB4 | £ 15,665,305 | |
| 12313 | OB5 | £ 9,012,088 | |
| 12314 | Obama Proposes | £ 2,061,600 | |
| 12315 | Obar Ardair | £ 387,490,277 | |
| 12316 | Obble | £ 466,184,526 | |
| 12317 | obedience | £ 55,772,487 | |
| 12318 | Obese American | £ 161,429,557 | |
| 12319 | Obi-Wan-Kenobi | £ 100,953,209 | |
| 12320 | Object in Motion | £ 106,865,438 | |
| 12321 | Obliterator | £ 5,501,753 | |
| 12322 | Oblivion | £ 75,985,020 | |
| 12323 | Obsolete | £ 55,457,606 | |
| 12324 | Obtuse | £ 14,379,095 | |
| 12325 | Obviously | £ 2,318,576,665 | |
| 12326 | OCB inc | £ 6,320,804 | |
| 12327 | Occasional Tables | £ 5,328,203 | |
| 12328 | Ocean | £ 52,827,866 | |
| 12329 | ocean star | £ 3,580,849,318 | |
| 12330 | Oceanic Enterprises | £ -50,808 | |
| 12331 | Oceans 11 | £ 58,500,636 | |
| 12332 | Oceans 12 | £ 10,291,638 | |
| 12333 | Oceans 13 | £ 132,219,759 | |
| 12334 | Oceans Eleven | £ 8,485,684 | |
| 12335 | Ocelot | £ 194,460,230 | |
| 12336 | Och Noooo | £ 1,506,119 | |
| 12337 | Octavian | £ 4,631,188 | |
| 12338 | October 2014 | £ 94,385,046 | |
| 12339 | Octopia | £ 9,626,521 | |
| 12340 | Octopus Garden | £ 4,050,927 | |
| 12341 | Oddjob | £ 16,604,273 | |
| 12342 | Odds on Favorite | £ 74,346,727 | |
| 12343 | Oddysay | £ 2,896,867 | |
| 12344 | Odell | £ 13,714,064 | |
| 12345 | Oden | £ 641,394,649 | |
| 12346 | oden wrath | £ 1,319,062,632 | |
| 12347 | odin | £ 8,811,968 | |
| 12348 | Odin Mafia | £ 8,768,668 | |
| 12349 | Odin the Wanderer | £ 4,687,105 | |
| 12350 | Odo | £ 32,513,900 | |
| 12351 | Odqan | £ 301,444,709 | |
| 12352 | Odyssey | £ 329,493,997 | |
| 12353 | of a black widow | £ 196,069,515 | |
| 12354 | Of a Brutal Empire | £ 36,359,377 | |
| 12355 | of a Solar Empire | £ 46,660,163 | |
| 12356 | Of All Your Land | £ 48,121,892 | |
| 12357 | Of Bomb | £ 5,131,350 | |
| 12358 | of CFC | £ 5,455,120 | |
| 12359 | of Elm Street | £ 49,875 | |
| 12360 | Of Every Position | £ 61,887,884 | |
| 12361 | Of Friday the 13th | £ 50,000 | |
| 12362 | Of Green Bay | £ 7,216,016 | |
| 12363 | of Impendium | £ 349,441 | |
| 12364 | of Long Stockings | £ 16,738,335 | |
| 12365 | Of Minisotta | £ 1,716,607 | |
| 12366 | Of My Label | £ 241,830,978 | |
| 12367 | of of | £ 7,075,463 | |
| 12368 | of of of | £ 4,201,365 | |
| 12369 | of REASON | £ 1,154,429 | |
| 12370 | of RHC | £ 68,042,901 | |
| 12371 | Of Scotland | £ 1,304,795,018 | |
| 12372 | of the devil | £ 27,539,344 | |
| 12373 | of The Hat | £ 5,507,097 | |
| 12374 | of the heap | £ 66,771,581 | |
| 12375 | of the lost | £ 69,257,675 | |
| 12376 | of the monsters | £ 41,126,098 | |
| 12377 | Of The Road | £ 146,979,140 | |
| 12378 | of the runite | £ 4,694,589 | |
| 12379 | Of The UVF | £ 133,321,393 | |
| 12380 | Of the world | £ 2,007,785 | |
| 12381 | Of Time | £ 372,360,923 | |
| 12382 | of. | £ 335,457,109 | |
| 12383 | Ofcom | £ 310,950,894 | |
| 12384 | Off | £ 25,794,080 | |
| 12385 | off it | £ 5,261,275 | |
| 12386 | Offenbach | £ 382,674,581 | |
| 12387 | Offensive Behaviour | £ 494,101,547 | |
| 12388 | office | £ 763,973,878 | |
| 12389 | Offroad Trucker | £ 289,809,909 | |
| 12390 | Offshore | £ 367,643,133 | |
| 12391 | Offshore Accounts | £ 140,823,548 | |
| 12392 | Offshore Cash | £ 60,279,702 | |
| 12393 | og esaelP | £ 4,208,484 | |
| 12394 | ogkush | £ 2,491,394 | |
| 12395 | Ogrimmar | £ 35,379,515 | |
| 12396 | Oh Herro | £ 2,995,837 | |
| 12397 | Oh Jesus Christ | £ 9,142,153 | |
| 12398 | Oh No | £ 161,601,595 | |
| 12399 | Oh YEAH | £ 2,549,726 | |
| 12400 | ohara inc | £ -165,571 | |
