The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 14801 | OCB inc | £ 6,320,804 | |
| 14802 | Occasional Tables | £ 5,328,203 | |
| 14803 | Ocean | £ 52,827,866 | |
| 14804 | Ocean Beach Club | £ 1,255,017,467 | |
| 14805 | Ocean Defence | £ 397,653,309 | |
| 14806 | ocean star | £ 3,580,849,318 | |
| 14807 | Oceans 11 | £ 58,500,636 | |
| 14808 | Oceans 12 | £ 10,291,638 | |
| 14809 | Oceans 13 | £ 132,219,759 | |
| 14810 | Oceans Eleven | £ 8,485,684 | |
| 14811 | Ocelot | £ 194,460,230 | |
| 14812 | Och Noooo | £ 1,506,119 | |
| 14813 | Octavian | £ 4,631,188 | |
| 14814 | October 1066 | £ 81,732,927 | |
| 14815 | October 1854 | £ 290,795,624 | |
| 14816 | October 2014 | £ 94,385,046 | |
| 14817 | Octopia | £ 9,626,521 | |
| 14818 | Octopus Garden | £ 4,050,927 | |
| 14819 | Oddjob | £ 16,604,273 | |
| 14820 | Odds and ends | £ 159,155,026 | |
| 14821 | Odds on Favorite | £ 74,346,727 | |
| 14822 | Oddysay | £ 2,896,867 | |
| 14823 | Oden | £ 641,394,649 | |
| 14824 | oden wrath | £ 1,735,842,850 | |
| 14825 | odin | £ 8,811,968 | |
| 14826 | Odin Mafia | £ 8,768,668 | |
| 14827 | Odin the Wanderer | £ 4,687,105 | |
| 14828 | Odo | £ 32,513,900 | |
| 14829 | Odqan | £ 190,425,954 | |
| 14830 | Odyssey | £ 334,944,633 | |
| 14831 | of a black widow | £ 201,523,785 | |
| 14832 | Of a Brutal Empire | £ 36,359,377 | |
| 14833 | of a Solar Empire | £ 46,660,163 | |
| 14834 | Of A Time | £ 27,824,181 | |
| 14835 | Of All Your Land | £ 48,121,892 | |
| 14836 | of Belfast | £ 91,135,550 | |
| 14837 | Of Bomb | £ 5,131,350 | |
| 14838 | of CFC | £ 5,455,120 | |
| 14839 | Of Every Position | £ 61,887,884 | |
| 14840 | Of My Label | £ 448,937,721 | |
| 14841 | of my secrets | £ 275,048,723 | |
| 14842 | of of | £ 7,075,463 | |
| 14843 | of REASON | £ 1,154,429 | |
| 14844 | of RHC | £ 68,042,901 | |
| 14845 | Of Scotland | £ 1,304,795,018 | |
| 14846 | Of The Boards | £ 14,794,127 | |
| 14847 | of the devil | £ 27,539,344 | |
| 14848 | of The Hat | £ 5,507,097 | |
| 14849 | of the heap | £ 66,771,581 | |
| 14850 | of the lost | £ 69,257,675 | |
| 14851 | of the monsters | £ 41,126,098 | |
| 14852 | Of The Road | £ 146,979,140 | |
| 14853 | of the runite | £ 4,694,589 | |
| 14854 | Of The UVF | £ 133,321,393 | |
| 14855 | Of the world | £ 2,007,785 | |
| 14856 | of. | £ 335,457,109 | |
| 14857 | Ofcom | £ 306,858,410 | |
| 14858 | Off | £ 30,007,225 | |
| 14859 | Off His Trolly | £ 10,806,044 | |
| 14860 | off it | £ 5,261,275 | |
| 14861 | Offenbach | £ 382,674,581 | |
| 14862 | Offender | £ 187,520,330 | |
| 14863 | Offensive Behaviour | £ 509,861,247 | |
| 14864 | Offensive Security | £ 215,291,542 | |
| 14865 | Official Location | £ 179,832,369 | |
| 14866 | Official Secrets Act | £ 2,860,576 | |
| 14867 | OfflineTV | £ 56,600,622 | |
| 14868 | Offroad Trucker | £ 159,595,283 | |
| 14869 | Offshore Accounts | £ 39,206,670 | |
| 14870 | Offshore Cash | £ 60,279,702 | |
| 14871 | Offshore Trading Company | £ 5,141,246 | |
| 14872 | Ofsted Inspection Regime | £ 1,751,261 | |
| 14873 | og esaelP | £ 4,208,484 | |
| 14874 | ogkush | £ 2,491,394 | |
| 14875 | Ogrimmar | £ 35,379,515 | |
| 14876 | Oh Herro | £ 2,995,837 | |
| 14877 | Oh Jesus Christ | £ 9,142,153 | |
| 14878 | Oh My God | £ 43,878,415 | |
| 14879 | Oh No | £ 12,356,550 | |
| 14880 | Oh YEAH | £ 2,549,726 | |
| 14881 | ohe herrow | £ 5,703,509 | |
| 14882 | Ohio | £ 177,472,329 | |
| 14883 | Ohms | £ 359,066,630 | |
| 14884 | Ohnoitsmymothernlaw | £ 5,504,562 | |
| 14885 | Ohtaku inc | £ 3,600,029 | |
| 14886 | Ohtaku inc1 | £ 4,456,703 | |
| 14887 | Ohtaku inc2 | £ 1,267,353 | |
| 14888 | Ohtaku inc3 | £ 4,191,984 | |
| 14889 | Ohtaku inc4 | £ 4,118,968 | |
| 14890 | Oil | £ 833,968,470 | |
| 14891 | Oil CONGLOMO | £ 2,646,845 | |
| 14892 | Oil Inc | £ 1,610,027 | |
| 14893 | Oil Industry | £ 4,441,721 | |
| 14894 | Oil Rigger | £ 2,151,587,047 | |
| 14895 | Oil Tycoon | £ 5,374,700 | |
| 14896 | Oilfield Industries | £ 9,854,297 | |
| 14897 | oiu | £ 5,498,037 | |
| 14898 | OK Tom | £ 287,808,145 | |
| 14899 | Oklahoma | £ 108,934,948 | |
| 14900 | OKS PTE LTD | £ 2,148,676 | |
