The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 14501 | one dollar company | £ 40,885,349 | |
| 14502 | One Enterprise | £ 5,940,523 | |
| 14503 | One Eye Morty | £ 31,145,230 | |
| 14504 | One Eyed Three Leg Dog | £ 63,605,247 | |
| 14505 | One gun | £ 869,495,116 | |
| 14506 | one hand clapping | £ 324,738,013 | |
| 14507 | One Hit Wonder | £ 30,087,678 | |
| 14508 | One Hundred Netro Bucks | £ 132,828,467 | |
| 14509 | One Insane Rastaman | £ 273,250,880 | |
| 14510 | one love | £ 3,838,898 | |
| 14511 | One Man | £ 3,996,240 | |
| 14512 | one man crying | £ 1,050,939,923 | |
| 14513 | One Mind | £ -5,139,455 | |
| 14514 | one of craze | £ 398,067,001 | |
| 14515 | One Piece | £ 11,282,781 | |
| 14516 | One Pound Fish | £ 1,584,921 | |
| 14517 | One Shot | £ 123,851,456 | |
| 14518 | One Silence | £ -4,074 | |
| 14519 | One to Many. | £ 4,976,234 | |
| 14520 | One United | £ 5,379,005 | |
| 14521 | one1 | £ 1,930,995 | |
| 14522 | oneone | £ 18,206,569 | |
| 14523 | Oner | £ 10,516,756 | |
| 14524 | OneStopEnvelopeShoppe | £ -38,952 | |
| 14525 | Onion of Arabia | £ 11,458,256 | |
| 14526 | Onioninc | £ -43,613 | |
| 14527 | Onions | £ 56,031,337 | |
| 14528 | onions inc | £ 46,832,459 | |
| 14529 | ONLINE GAMES | £ 120,242,830 | |
| 14530 | Only Bombs Allowed | £ 57,741,277 | |
| 14531 | Only Fans | £ 556,272,296 | |
| 14532 | Only Fools and Horses | £ 859,719,219 | |
| 14533 | only me | £ 50,000 | |
| 14534 | only me inc | £ 133,078,068 | |
| 14535 | ONLY MY LIFE MATTERS | £ 41,398,027 | |
| 14536 | Onomatopoeias | £ 939,660 | |
| 14537 | Onshore Money | £ 104,918,400 | |
| 14538 | Ontara | £ 79,736,570 | |
| 14539 | Ontario | £ 123,135,268 | |
| 14540 | ontheblock | £ 6,402,837 | |
| 14541 | Onyx | £ 429,592 | |
| 14542 | OO7 | £ 31,188,400 | |
| 14543 | Ooglaigh na Heireann | £ 240,713,877 | |
| 14544 | oohyeaa | £ 50,844,745 | |
| 14545 | Oolacile-01 | £ 3,643,194 | |
| 14546 | oOoOo | £ 55,100,087 | |
| 14547 | oooooo | £ 5,505,528 | |
| 14548 | OOOoooOOO | £ 614,697 | |
| 14549 | oooPPPooo | £ -53,065 | |
| 14550 | oops | £ 965,477 | |
| 14551 | ooz | £ 320,966,832 | |
| 14552 | Opal Opal | £ 5,502,194 | |
| 14553 | Opec | £ 583,445,312 | |
| 14554 | Opel Dire | £ 5,505,993 | |
| 14555 | OpEn FoR BuIsNeSs | £ 5,785,269 | |
| 14556 | Opera House | £ 123,137,933 | |
| 14557 | OPERATION SEALION | £ 10,353,786 | |
| 14558 | OPERATION SEALION 2 | £ 5,504,218 | |
| 14559 | Operations | £ 8,189,228 | |
| 14560 | Ophthalmology | £ 45,575,639 | |
| 14561 | opiates | £ 10,578,986 | |
| 14562 | Opinion | £ 389,953,431 | |
| 14563 | OPiuM | £ 115,856,941 | |
| 14564 | Oppa Gangnam Style | £ 65,242,420 | |
| 14565 | Oppenheim | £ 51,959,450 | |
| 14566 | Oppertunity | £ 512,316,834 | |
| 14567 | Opportunity | £ 11,354,079 | |
| 14568 | Opposition | £ 761,831,311 | |
| 14569 | Oppression | £ 416,055,267 | |
| 14570 | OpRedStripe | £ 39,676,062 | |
| 14571 | optical | £ 491,833,848 | |
| 14572 | Optimal Flames | £ 172,997,462 | |
| 14573 | Optimum Nutrition | £ -3,018,246 | |
| 14574 | Optimus Inc. | £ -2,482,292 | |
| 14575 | Options | £ 84,494,650 | |
| 14576 | Options Trading | £ 15,395,474 | |
| 14577 | Opus Dei | £ 694,720,428 | |
| 14578 | opus technology | £ 35,372,824 | |
| 14579 | Oracle | £ 5,067,108 | |
| 14580 | Orakos | £ 5,484,841 | |
| 14581 | Orang | £ 46,959,797 | |
| 14582 | Orange | £ 24,725,264 | |
| 14583 | Orange Aftershock | £ 67,681,186 | |
| 14584 | Orange Castle | £ 615,362 | |
| 14585 | Orange Creatine | £ 6,196,167 | |
| 14586 | Orange Inc. | £ 1,716,053 | |
| 14587 | Orange Jelly | £ 6,594,926 | |
| 14588 | Orange Jooze | £ 1,261,621 | |
| 14589 | Orange Jooze 3 | £ 50,000 | |
| 14590 | Orange Jooze2 | £ 795,888 | |
| 14591 | Orange Jooze4 | £ 50,000 | |
| 14592 | Orange Jooze5 | £ 50,000 | |
| 14593 | Orange Juice | £ 23,922,208 | |
| 14594 | Orange Paint | £ 97,288,036 | |
| 14595 | Oranginal | £ 4,103,756 | |
| 14596 | oranje | £ 4,966,784 | |
| 14597 | Orbital | £ 54,539,946 | |
| 14598 | Orbital Bombardment | £ 1,279,471,445 | |
| 14599 | Orbital Mechanics | £ 46,400,865 | |
| 14600 | Orchids R Us Ltd | £ 39,331,588 | |
