The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 13601 | olis | £ 91,036,818 | |
| 13602 | Oliver Cromwell | £ 220,112,740 | |
| 13603 | Oliver Queen | £ 56,107,912 | |
| 13604 | Olivers Imagination | £ 124,320,555 | |
| 13605 | Olrik | £ 22,147,425 | |
| 13606 | Olympia | £ 112,782,553 | |
| 13607 | olympic rings | £ 3,084,696,830 | |
| 13608 | Olympics | £ 5,508,747 | |
| 13609 | Olympus | £ 2,062,876,669 | |
| 13610 | Omega | £ 6,183,955 | |
| 13611 | Omega Indusries | £ 37,799 | |
| 13612 | OmegaFox Inc. | £ 1,266,634 | |
| 13613 | Omelette | £ 10,061,528 | |
| 13614 | Omerta | £ 1,007,186,123 | |
| 13615 | Omerta Inc. | £ 5,500,096 | |
| 13616 | Omni | £ 26,585,058 | |
| 13617 | Omni Consumer Products | £ -23,968,848 | |
| 13618 | omni4 | £ 1,185,151 | |
| 13619 | Omnia | £ 29,796,207 | |
| 13620 | Omnifarious | £ 1,093,030,354 | |
| 13621 | Omnificent | £ 1,021,148,545 | |
| 13622 | Omnipotent | £ 1,018,201,653 | |
| 13623 | Omnipresent | £ 1,070,679,703 | |
| 13624 | Omniscient | £ 1,010,547,321 | |
| 13625 | Omnitool | £ 4,640,506 | |
| 13626 | on a stick | £ 13,410 | |
| 13627 | On all you Candyass | £ 69,045,286 | |
| 13628 | On Industries | £ 1,896,074 | |
| 13629 | On It | £ 59,533,659 | |
| 13630 | On My Mind | £ 87,748,385 | |
| 13631 | On The Fritz | £ 79,242,996 | |
| 13632 | On the move | £ 93,895,866 | |
| 13633 | on the road | £ 405,722,546 | |
| 13634 | once | £ -263,290 | |
| 13635 | Once Said | £ 4,848,853 | |
| 13636 | Once Upon a Time | £ 24,760,937 | |
| 13637 | Once Were Warriors | £ 54,754,263 | |
| 13638 | one | £ 341,379,992 | |
| 13639 | One and a Half | £ 8,610,014,000 | |
| 13640 | One Company | £ 398,709,264 | |
| 13641 | one dollar company | £ 40,885,349 | |
| 13642 | One Enterprise | £ 5,940,523 | |
| 13643 | One Eyed Three Leg Dog | £ 63,605,247 | |
| 13644 | One gun | £ 232,841,441 | |
| 13645 | one hand clapping | £ 1,250,000 | |
| 13646 | One Hit Wonder | £ 30,087,678 | |
| 13647 | One Hundred Netro Bucks | £ 130,455,162 | |
| 13648 | One Insane Rastaman | £ 273,250,880 | |
| 13649 | one love | £ 3,838,898 | |
| 13650 | One Man | £ 3,996,240 | |
| 13651 | one man crying | £ 1,050,939,923 | |
| 13652 | One Mind | £ -5,139,455 | |
| 13653 | one of craze | £ 398,067,001 | |
| 13654 | One Piece | £ 11,282,781 | |
| 13655 | One Pound Fish | £ 1,584,921 | |
| 13656 | One Shot | £ 123,851,456 | |
| 13657 | One Silence | £ -4,074 | |
| 13658 | One to Many. | £ 4,976,234 | |
| 13659 | One United | £ 5,379,005 | |
| 13660 | one1 | £ 1,930,995 | |
| 13661 | OneNation | £ 45,456 | |
| 13662 | oneone | £ 18,206,569 | |
| 13663 | Oner | £ 10,516,756 | |
| 13664 | OneStopEnvelopeShoppe | £ -38,952 | |
| 13665 | Onion of Arabia | £ 11,458,256 | |
| 13666 | Onioninc | £ -43,613 | |
| 13667 | Onions | £ 56,031,337 | |
| 13668 | onions inc | £ 46,832,459 | |
| 13669 | ONLINE GAMES | £ 120,242,830 | |
| 13670 | Only Bombs Allowed | £ 57,741,277 | |
| 13671 | Only Fans | £ 401,281,758 | |
| 13672 | Only Fools and Horses | £ 859,719,219 | |
| 13673 | only me | £ 50,000 | |
| 13674 | only me inc | £ 133,078,068 | |
| 13675 | Onomatopoeias | £ 939,660 | |
| 13676 | Onshore Money | £ 104,918,400 | |
| 13677 | Ontara | £ 79,736,570 | |
| 13678 | Ontario | £ 85,260,376 | |
| 13679 | ontheblock | £ 6,402,837 | |
| 13680 | Onyx | £ 429,592 | |
| 13681 | OO7 | £ 11,267,872 | |
| 13682 | Ooglaigh na Heireann | £ 240,713,877 | |
| 13683 | oohyeaa | £ 50,844,745 | |
| 13684 | Oolacile-01 | £ 3,643,194 | |
| 13685 | oOoOo | £ 83,814,525 | |
| 13686 | oooooo | £ 5,505,528 | |
| 13687 | OOOoooOOO | £ 614,697 | |
| 13688 | oooPPPooo | £ -53,065 | |
| 13689 | oops | £ 965,477 | |
| 13690 | ooz | £ 320,966,832 | |
| 13691 | Opal Opal | £ 5,502,194 | |
| 13692 | Opec | £ 273,634,128 | |
| 13693 | Opel Dire | £ 5,505,993 | |
| 13694 | OpEn FoR BuIsNeSs | £ 5,785,269 | |
| 13695 | Opera House | £ 27,344,105 | |
| 13696 | OPERATION SEALION | £ 10,353,786 | |
| 13697 | OPERATION SEALION 2 | £ 5,504,218 | |
| 13698 | Operations | £ 8,189,228 | |
| 13699 | Ophthalmology | £ 45,575,639 | |
| 13700 | opiates | £ 10,578,986 | |
