The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 11801 | Old Age | £ 372,141,647 | |
| 11802 | Old Bay | £ 123,534,579 | |
| 11803 | Old Bill | £ 45,792,842 | |
| 11804 | Old Carpet | £ 163,972,008 | |
| 11805 | old farts | £ 1,848,837,000 | |
| 11806 | Old Feuds | £ 44,696,704 | |
| 11807 | Old Granny | £ 9,329,769 | |
| 11808 | old lard | £ -7,521,344 | |
| 11809 | old legends | £ 14,735,844 | |
| 11810 | Old men | £ 397,899,239 | |
| 11811 | Old No. 7 | £ 620,700,257 | |
| 11812 | Old people | £ 41,298,004 | |
| 11813 | Old Rocker | £ 7,054,930 | |
| 11814 | Old School | £ 5,514,041 | |
| 11815 | old skool butta | £ 614,087 | |
| 11816 | Old Smoky | £ 622,122,584 | |
| 11817 | Old Socks | £ 144,379,758 | |
| 11818 | Old Whiskey | £ 17,558,590 | |
| 11819 | Old World Industry | £ 1,734,908 | |
| 11820 | Old World Ventures | £ 50,000 | |
| 11821 | OlDirty | £ 47,991,916 | |
| 11822 | oldschool | £ 50,536,236 | |
| 11823 | Oligarchy | £ 556,860,397 | |
| 11824 | Oligarchy inc. | £ 7,116,723 | |
| 11825 | olis | £ 91,036,818 | |
| 11826 | Oliver Cromwell | £ 220,112,740 | |
| 11827 | Oliver Queen | £ 56,107,912 | |
| 11828 | Olivers Imagination | £ 124,320,555 | |
| 11829 | Olrik | £ 22,147,425 | |
| 11830 | Olympia | £ 112,782,553 | |
| 11831 | olympic rings | £ 2,480,237,771 | |
| 11832 | Olympics | £ 5,508,747 | |
| 11833 | Olympus | £ 272,868,177 | |
| 11834 | Omega | £ 6,183,955 | |
| 11835 | Omega Indusries | £ 37,799 | |
| 11836 | OmegaFox Inc. | £ 1,266,634 | |
| 11837 | Omelette | £ 10,061,528 | |
| 11838 | Omerta | £ 1,007,186,123 | |
| 11839 | Omerta Inc. | £ 5,500,096 | |
| 11840 | Omni | £ 26,585,058 | |
| 11841 | Omni Consumer Products | £ -2,231,244 | |
| 11842 | omni4 | £ 1,185,151 | |
| 11843 | Omnia | £ 29,796,207 | |
| 11844 | on a stick | £ 13,410 | |
| 11845 | On all you Candyass | £ 69,045,286 | |
| 11846 | On Industries | £ 1,896,074 | |
| 11847 | On It | £ 59,533,659 | |
| 11848 | On My Mind | £ 87,748,385 | |
| 11849 | On The Fritz | £ 79,242,996 | |
| 11850 | on the road | £ 73,475,023 | |
| 11851 | Once Upon a Time | £ 24,760,937 | |
| 11852 | Once Were Warriors | £ 54,754,263 | |
| 11853 | one | £ 341,379,992 | |
| 11854 | One and a Half | £ 8,277,049,146 | |
| 11855 | One Company | £ 399,533,016 | |
| 11856 | One Eyed Three Leg Dog | £ 63,605,247 | |
| 11857 | One Hit Wonder | £ 30,087,678 | |
| 11858 | One Insane Rastaman | £ 196,113,619 | |
| 11859 | one love | £ 3,838,898 | |
| 11860 | one man crying | £ 910,529,066 | |
| 11861 | One Mind | £ -5,139,455 | |
| 11862 | one of craze | £ 398,067,001 | |
| 11863 | One Piece | £ 11,282,781 | |
| 11864 | One Pound Fish | £ 1,584,921 | |
| 11865 | One Shot | £ 123,851,456 | |
| 11866 | One Silence | £ -4,074 | |
| 11867 | One to Many. | £ 4,976,234 | |
| 11868 | One United | £ 5,379,005 | |
| 11869 | one1 | £ 3,058,084 | |
| 11870 | OneNation | £ 45,456 | |
| 11871 | oneone | £ 18,206,569 | |
| 11872 | Oner | £ 10,516,756 | |
| 11873 | OneStopEnvelopeShoppe | £ -38,952 | |
| 11874 | Onion of Arabia | £ 11,458,256 | |
| 11875 | Onions | £ 56,031,337 | |
| 11876 | onions inc | £ 46,832,459 | |
| 11877 | ONLINE GAMES | £ 120,242,830 | |
| 11878 | Only Bombs Allowed | £ 57,741,277 | |
| 11879 | Only Fools and Horses | £ 406,534,920 | |
| 11880 | only me | £ 50,000 | |
| 11881 | only me inc | £ 133,078,068 | |
| 11882 | Onomatopoeias | £ 939,660 | |
| 11883 | Onshore Money | £ 104,918,400 | |
| 11884 | Ontara | £ 79,736,570 | |
| 11885 | Ontario | £ 85,260,376 | |
| 11886 | ontheblock | £ 6,402,837 | |
| 11887 | Onyx | £ 429,592 | |
| 11888 | Ooglaigh na Heireann | £ 240,713,877 | |
| 11889 | oohyeaa | £ 50,844,745 | |
| 11890 | Oolacile-01 | £ 2,954,344 | |
| 11891 | oOoOo | £ 60,043,338 | |
| 11892 | oooooo | £ 5,505,528 | |
| 11893 | OOOoooOOO | £ 614,697 | |
| 11894 | oooPPPooo | £ -53,065 | |
| 11895 | oops | £ 965,477 | |
| 11896 | ooz | £ 320,966,832 | |
| 11897 | Opal Opal | £ 5,502,194 | |
| 11898 | Opel Dire | £ 5,505,993 | |
| 11899 | OpEn FoR BuIsNeSs | £ 5,785,269 | |
| 11900 | Operation Racoon City | £ 4,748,173 | |
