The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 16401 | Obsession | £ 4,141,059 | |
| 16402 | Obsidian | £ 5,952,122 | |
| 16403 | Obsidian Destroyer | £ 5,567,314 | |
| 16404 | Obsolete | £ 55,457,606 | |
| 16405 | Obtuse | £ 14,379,095 | |
| 16406 | ObusPrimeLLC | £ 50,000 | |
| 16407 | Obviously | £ 2,318,576,665 | |
| 16408 | Ocarina of Time | £ -1,574,201 | |
| 16409 | OCB inc | £ 6,320,804 | |
| 16410 | Occasional Tables | £ 5,328,203 | |
| 16411 | Ocean | £ 52,827,866 | |
| 16412 | Ocean Beach Club | £ 1,197,598,429 | |
| 16413 | Ocean Defence | £ 414,166,835 | |
| 16414 | ocean star | £ 3,580,849,318 | |
| 16415 | Oceanic Enterprises | £ -50,808 | |
| 16416 | Oceans 11 | £ 58,500,636 | |
| 16417 | Oceans 12 | £ 10,291,638 | |
| 16418 | Oceans 13 | £ 132,219,759 | |
| 16419 | Oceans Eleven | £ 8,485,684 | |
| 16420 | Ocelot | £ 194,460,230 | |
| 16421 | Och Noooo | £ 1,506,119 | |
| 16422 | Octavian | £ 4,631,188 | |
| 16423 | October 1066 | £ 81,732,927 | |
| 16424 | October 1854 | £ 290,795,624 | |
| 16425 | October 2014 | £ 94,385,046 | |
| 16426 | Octopia | £ 9,626,521 | |
| 16427 | Octopus Garden | £ 4,050,927 | |
| 16428 | Odd Things | £ 8,988,958 | |
| 16429 | Oddjob | £ 16,604,273 | |
| 16430 | Odds and ends | £ 155,372,139 | |
| 16431 | Odds on Favorite | £ 74,346,727 | |
| 16432 | Oddysay | £ 2,896,867 | |
| 16433 | Odell | £ 13,714,064 | |
| 16434 | Oden | £ 641,394,649 | |
| 16435 | oden wrath | £ 1,735,842,850 | |
| 16436 | odin | £ 8,811,968 | |
| 16437 | Odin Mafia | £ 8,768,668 | |
| 16438 | Odin the Wanderer | £ 4,687,105 | |
| 16439 | Odo | £ 32,513,900 | |
| 16440 | Odqan | £ 188,512,804 | |
| 16441 | Odyssey | £ 334,944,633 | |
| 16442 | of a black widow | £ 196,069,515 | |
| 16443 | Of a Brutal Empire | £ 36,359,377 | |
| 16444 | of a Solar Empire | £ 46,660,163 | |
| 16445 | Of A Time | £ 27,824,181 | |
| 16446 | Of All Your Land | £ 48,121,892 | |
| 16447 | of Belfast | £ 57,023,435 | |
| 16448 | Of Bomb | £ 5,131,350 | |
| 16449 | of CFC | £ 5,455,120 | |
| 16450 | Of Every Position | £ 61,887,884 | |
| 16451 | Of Friday the 13th | £ 50,000 | |
| 16452 | of Impendium | £ 349,441 | |
| 16453 | of Long Stockings | £ 16,738,335 | |
| 16454 | Of My Label | £ 367,377,610 | |
| 16455 | of my secrets | £ 259,853,757 | |
| 16456 | of of | £ 7,075,463 | |
| 16457 | of of of of of of of of | £ 50,000 | |
| 16458 | of REASON | £ 1,154,429 | |
| 16459 | of RHC | £ 68,042,901 | |
| 16460 | Of Scotland | £ 1,304,795,018 | |
| 16461 | Of The Boards | £ 14,794,127 | |
| 16462 | of the devil | £ 27,539,344 | |
| 16463 | of The Hat | £ 5,507,097 | |
| 16464 | of the heap | £ 66,771,581 | |
| 16465 | of the lost | £ 69,257,675 | |
| 16466 | of the monsters | £ 41,126,098 | |
| 16467 | Of The Road | £ 146,979,140 | |
| 16468 | of the runite | £ 4,694,589 | |
| 16469 | Of The UVF | £ 133,321,393 | |
| 16470 | Of the world | £ 2,007,785 | |
| 16471 | of. | £ 335,457,109 | |
| 16472 | Ofcom | £ 306,858,410 | |
| 16473 | Off | £ 28,947,232 | |
| 16474 | Off His Trolly | £ 10,806,044 | |
| 16475 | off it | £ 5,261,275 | |
| 16476 | Offenbach | £ 382,674,581 | |
| 16477 | Offender | £ 117,520,331 | |
| 16478 | Offensive Behaviour | £ 509,861,247 | |
| 16479 | Offensive Security | £ 211,114,754 | |
| 16480 | Official Location | £ 179,832,369 | |
| 16481 | OfflineTV | £ 56,600,622 | |
| 16482 | Offroad Trucker | £ 154,913,798 | |
| 16483 | Offshore Accounts | £ 39,206,670 | |
| 16484 | Offshore Cash | £ 60,279,702 | |
| 16485 | Offshore Trading Company | £ 5,141,246 | |
| 16486 | Ofsted Inspection Regime | £ 61,751,261 | |
| 16487 | og esaelP | £ 4,208,484 | |
| 16488 | ogkush | £ 2,491,394 | |
| 16489 | Ogrimmar | £ 35,379,515 | |
| 16490 | Oh Herro | £ 2,995,837 | |
| 16491 | Oh Jesus Christ | £ 9,142,153 | |
| 16492 | Oh My God | £ 40,692,887 | |
| 16493 | Oh No | £ 206,006,520 | |
| 16494 | Oh YEAH | £ 2,549,726 | |
| 16495 | ohara inc | £ -165,571 | |
| 16496 | ohe herrow | £ 5,703,509 | |
| 16497 | Ohio | £ 74,319,614 | |
| 16498 | Ohms | £ 287,575,753 | |
| 16499 | Ohnoitsmymothernlaw | £ 5,504,562 | |
| 16500 | Ohtaku inc | £ 3,600,029 | |
