The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 14401 | OOOoooOOO | £ 614,697 | |
| 14402 | oooPPPooo | £ -53,065 | |
| 14403 | oops | £ 965,477 | |
| 14404 | ooz | £ 320,966,832 | |
| 14405 | Opal Opal | £ 5,502,194 | |
| 14406 | Opec | £ 1,358,677,165 | |
| 14407 | Opel Dire | £ 5,505,993 | |
| 14408 | OpEn FoR BuIsNeSs | £ 5,785,269 | |
| 14409 | Opera House | £ 123,137,933 | |
| 14410 | OPERATION SEALION | £ 10,353,786 | |
| 14411 | OPERATION SEALION 2 | £ 5,504,218 | |
| 14412 | Ophthalmology | £ 45,575,639 | |
| 14413 | Opinion | £ 389,953,431 | |
| 14414 | OPiuM | £ 115,856,941 | |
| 14415 | Oppa Gangnam Style | £ 65,242,420 | |
| 14416 | Oppenheim | £ 51,959,450 | |
| 14417 | Oppenheimer | £ 1,424,302 | |
| 14418 | Oppertunity | £ 512,316,834 | |
| 14419 | Opportunity | £ 11,354,079 | |
| 14420 | Opposition | £ 761,831,311 | |
| 14421 | Oppression | £ 416,055,267 | |
| 14422 | OpRedStripe | £ 39,676,062 | |
| 14423 | optical | £ 491,833,848 | |
| 14424 | optics | £ 57,286,889 | |
| 14425 | Optimal Flames | £ 172,997,462 | |
| 14426 | Optimum Nutrition | £ -3,018,246 | |
| 14427 | Optimus Inc. | £ -2,482,292 | |
| 14428 | Options | £ 84,494,650 | |
| 14429 | Options Trading | £ 15,395,474 | |
| 14430 | Opus Dei | £ 1,466,479,264 | |
| 14431 | opus technology | £ 35,372,824 | |
| 14432 | Oracle | £ 5,067,108 | |
| 14433 | Orakos | £ 9,653,572 | |
| 14434 | Orange | £ 24,725,264 | |
| 14435 | Orange Aftershock | £ 67,681,186 | |
| 14436 | Orange Castle | £ 615,362 | |
| 14437 | Orange County | £ 4,910,507 | |
| 14438 | Orange Creatine | £ 6,196,167 | |
| 14439 | Orange Jelly | £ 6,594,926 | |
| 14440 | Orange Jooze | £ 1,261,621 | |
| 14441 | Orange Jooze 3 | £ 50,000 | |
| 14442 | Orange Jooze2 | £ 795,888 | |
| 14443 | Orange Jooze4 | £ 50,000 | |
| 14444 | Orange Jooze5 | £ 50,000 | |
| 14445 | Orange Paint | £ 97,288,036 | |
| 14446 | Oranginal | £ 4,103,756 | |
| 14447 | oranje | £ 4,966,784 | |
| 14448 | Orbital | £ 54,539,946 | |
| 14449 | Orbital Bombardment | £ 1,279,471,445 | |
| 14450 | Orbital Mechanics | £ 112,770,006 | |
| 14451 | Orchids R Us Ltd | £ 39,331,588 | |
| 14452 | orcs | £ 2,521,634,731 | |
| 14453 | Orcustra | £ 702,800 | |
| 14454 | Order | £ 176,233,665 | |
| 14455 | Order Flow | £ 121,681,973 | |
| 14456 | Orders | £ 27,738,927 | |
| 14457 | ordinary matter | £ 213,537,735 | |
| 14458 | Oregon | £ 111,775,168 | |
| 14459 | OREO | £ 64,657,012 | |
| 14460 | Org | £ 18,286,924 | |
| 14461 | Organic Fruits and Veggy | £ 23,175,728 | |
| 14462 | Organics Ltd | £ 105,054,559 | |
| 14463 | Organised Crime | £ 17,216,443 | |
| 14464 | Organized Crime | £ 62,808,878 | |
| 14465 | Orgia Co. | £ 4,887,593 | |
| 14466 | Orgy | £ 6,092,194,361 | |
| 14467 | Origin | £ 1,144,096,740 | |
| 14468 | Origin yartley | £ 37,041,694 | |
| 14469 | Original 16 | £ 174,342,608 | |
| 14470 | Original Gangster | £ 66,733,459 | |
| 14471 | Original Sin | £ 144,878,801 | |
| 14472 | Originality | £ 2,212,304,543 | |
| 14473 | Origins | £ 63,035,912 | |
| 14474 | Orino | £ 56,346,103 | |
| 14475 | Orion | £ 47,648,728 | |
| 14476 | Orleans | £ 4,119,565 | |
| 14477 | orm | £ 2,468,322,281 | |
| 14478 | orming | £ 93,522,566 | |
| 14479 | Ornamental Knights | £ 3,129,157 | |
| 14480 | Ornate | £ -8,047,867 | |
| 14481 | Orome Aldaron | £ 1,531,184,473 | |
| 14482 | OronzoMafia | £ 5,474,161 | |
| 14483 | Orphans Court | £ 297,981,744 | |
| 14484 | Orpheus | £ 285,236,792 | |
| 14485 | Orphic Co. | £ 4,423,125 | |
| 14486 | Orquinox Co. | £ 1,119 | |
| 14487 | Orricks IT Services | £ 15,082,611 | |
| 14488 | Ortcaj | £ 77,296,813 | |
| 14489 | Orthanc Inc. | £ 147,448,563 | |
| 14490 | Osaka | £ 5,504,057 | |
| 14491 | Osakin | £ 6,161,131 | |
| 14492 | Osbourne | £ 1,744,973 | |
| 14493 | osca-websites | £ 9,181,996 | |
| 14494 | Oscar Meyer | £ 5,773,809 | |
| 14495 | Oscillation | £ 3,001,978 | |
| 14496 | Oscorp Industries | £ 179,374 | |
| 14497 | OSHA Six Flags | £ 5,346,082 | |
| 14498 | Osipolis | £ 16,660,041 | |
| 14499 | Osiris | £ 225,126,101 | |
| 14500 | osiris666 | £ -1,880,407 | |
