The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 16501 | Orange Jooze 3 | £ 50,000 | |
| 16502 | Orange Jooze2 | £ 795,888 | |
| 16503 | Orange Jooze4 | £ 50,000 | |
| 16504 | Orange Jooze5 | £ 50,000 | |
| 16505 | Orange Paint | £ 97,288,036 | |
| 16506 | Oranginal | £ 4,103,756 | |
| 16507 | oranje | £ 4,966,784 | |
| 16508 | Orbital | £ 54,539,946 | |
| 16509 | Orbital Bombardment | £ 1,279,471,445 | |
| 16510 | Orbital Mechanics | £ 181,831,424 | |
| 16511 | Orbital Oasis | £ 61,220,273 | |
| 16512 | Orchids R Us Ltd | £ 39,331,588 | |
| 16513 | orcs | £ 2,521,634,731 | |
| 16514 | Orcus | £ 454,713 | |
| 16515 | Orcustra | £ 702,800 | |
| 16516 | Order | £ 176,233,665 | |
| 16517 | Order Flow | £ 121,681,973 | |
| 16518 | Ordinance | £ 12,412,156 | |
| 16519 | ordinary matter | £ 329,533,344 | |
| 16520 | Oregon | £ 124,309,766 | |
| 16521 | OREO | £ 64,657,012 | |
| 16522 | Org | £ 18,286,924 | |
| 16523 | Organic Fruits and Veggy | £ 23,175,728 | |
| 16524 | Organics Ltd | £ 105,054,559 | |
| 16525 | Organised | £ 41,104,839 | |
| 16526 | Organised Crime | £ 17,216,443 | |
| 16527 | Organised.net | £ 55,489,672 | |
| 16528 | Organized Crime | £ 62,808,878 | |
| 16529 | Orgia Co. | £ 4,887,593 | |
| 16530 | Orgy | £ 6,305,557,347 | |
| 16531 | Origin | £ 1,772,898,965 | |
| 16532 | Original 16 | £ 174,342,608 | |
| 16533 | Original Gangster | £ 120,299,845 | |
| 16534 | Original Sin | £ 144,878,801 | |
| 16535 | Original Taste | £ 47,942,688 | |
| 16536 | Original Thoughts | £ 103,618,655 | |
| 16537 | Originality | £ 2,404,207,968 | |
| 16538 | Origins | £ 63,035,912 | |
| 16539 | Orino | £ 56,346,103 | |
| 16540 | Orion | £ 47,648,728 | |
| 16541 | Orion. | £ 374,172,630 | |
| 16542 | Orleans | £ 17,312,063 | |
| 16543 | orm | £ 2,684,322,281 | |
| 16544 | orming | £ 84,475,985 | |
| 16545 | Ornate | £ -8,047,867 | |
| 16546 | Orome Aldaron | £ 1,531,184,473 | |
| 16547 | OronzoMafia | £ 5,474,161 | |
| 16548 | Orphans Court | £ 297,981,744 | |
| 16549 | Orpheus | £ 288,236,792 | |
| 16550 | Orphic Co. | £ 4,423,125 | |
| 16551 | Orquinox Co. | £ 1,119 | |
| 16552 | Orricks IT Services | £ 15,082,611 | |
| 16553 | Ortcaj | £ 77,296,813 | |
| 16554 | Orthanc Inc. | £ 147,448,563 | |
| 16555 | Osaka | £ 5,504,057 | |
| 16556 | Osakin | £ 6,161,131 | |
| 16557 | Osbourne | £ 1,744,973 | |
| 16558 | osca-websites | £ 9,181,996 | |
| 16559 | Oscar Meyer | £ 5,773,809 | |
| 16560 | Oscars Emporium | £ 148,690,217 | |
| 16561 | Oscillation | £ 3,001,978 | |
| 16562 | Oscorp Industries | £ 179,374 | |
| 16563 | OSHA | £ 6,951,463 | |
| 16564 | OSHA Six Flags | £ 5,346,082 | |
| 16565 | Osipolis | £ 16,660,041 | |
| 16566 | Osiris | £ 225,126,101 | |
| 16567 | osiris666 | £ -1,880,407 | |
| 16568 | osiris6971 | £ 50,840,965 | |
| 16569 | Oslo | £ 9,880,014 | |
| 16570 | Osmosis | £ 41,633,292 | |
| 16571 | Osprey Close | £ 53,590,765 | |
| 16572 | Othello | £ 79,511,406 | |
| 16573 | Other Companies | £ 5,505,336 | |
| 16574 | other comps | £ 286,021,008 | |
| 16575 | Other People | £ 12,169,340 | |
| 16576 | Others | £ 26,039,960 | |
| 16577 | Others sometimes | £ 65,359,099 | |
| 16578 | otherwil | £ 133,717 | |
| 16579 | otherwil2 | £ -34,567,223 | |
| 16580 | otherwil3 | £ 1,893,225 | |
| 16581 | otherwil4 | £ 4,826,025 | |
| 16582 | otherwil5 | £ 829,030 | |
| 16583 | Ottawa | £ 44,778,874 | |
| 16584 | Ottoman Empire | £ 56,887,049 | |
| 16585 | OU812 | £ 295,697,174 | |
| 16586 | Ouija Industries | £ 345,812 | |
| 16587 | our butterfly | £ 1,134,896,288 | |
| 16588 | Our Champion | £ 50,672,707 | |
| 16589 | our differences | £ 302,439,939 | |
| 16590 | Our Discontent | £ 5,507,855 | |
| 16591 | Our Fathers | £ 116,143,694 | |
| 16592 | Our Golden Years | £ 908,659,300 | |
| 16593 | Our Good Name | £ 571,345,968 | |
| 16594 | Our Happy Memories | £ 34,408,558 | |
| 16595 | our judgement | £ 621,639,331 | |
| 16596 | our lifes | £ 464,291,926 | |
| 16597 | Our Lives | £ 60,309,789 | |
| 16598 | Our Times | £ 1,742,749 | |
| 16599 | our universe | £ 611,100,154 | |
| 16600 | our ways | £ 45,190,974 | |
