The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 13001 | opus technology | £ 35,372,824 | |
| 13002 | Oracle | £ 5,067,108 | |
| 13003 | Orakos | £ 5,484,841 | |
| 13004 | Orang | £ 46,959,797 | |
| 13005 | Orange | £ 24,725,264 | |
| 13006 | Orange Aftershock | £ 67,681,186 | |
| 13007 | Orange Castle | £ 615,362 | |
| 13008 | Orange Creatine | £ 6,196,167 | |
| 13009 | Orange Jelly | £ 6,594,926 | |
| 13010 | Orange Jooze | £ 1,261,621 | |
| 13011 | Orange Jooze 3 | £ 50,000 | |
| 13012 | Orange Jooze2 | £ 795,888 | |
| 13013 | Orange Jooze4 | £ 50,000 | |
| 13014 | Orange Jooze5 | £ 50,000 | |
| 13015 | Orange Juice | £ 92,208,399 | |
| 13016 | Orange Paint | £ 97,288,036 | |
| 13017 | Oranginal | £ 4,103,756 | |
| 13018 | oranje | £ 4,966,784 | |
| 13019 | Orbital | £ 54,539,946 | |
| 13020 | Orbital Bombardment | £ 1,188,671,445 | |
| 13021 | Orchids R Us Ltd | £ 39,331,588 | |
| 13022 | orcs | £ 2,521,634,731 | |
| 13023 | Orcustra | £ 702,800 | |
| 13024 | Order | £ 176,233,665 | |
| 13025 | ordinary matter | £ 20,236,590 | |
| 13026 | Oregon | £ 111,775,168 | |
| 13027 | OREO | £ 64,657,012 | |
| 13028 | Org | £ 18,286,924 | |
| 13029 | Organic Beaver | £ 48,683,222 | |
| 13030 | Organics Ltd | £ 105,054,559 | |
| 13031 | Organised Crime | £ 17,216,443 | |
| 13032 | Organized Crime | £ 62,808,878 | |
| 13033 | Orgia Co. | £ 4,887,593 | |
| 13034 | Orgy | £ 4,311,652,261 | |
| 13035 | Origin yartley | £ 37,041,694 | |
| 13036 | Original 16 | £ 132,618,089 | |
| 13037 | Original Sin | £ 141,442,446 | |
| 13038 | Originality | £ 1,357,128,017 | |
| 13039 | Origins | £ 63,035,912 | |
| 13040 | Orino | £ 37,003,222 | |
| 13041 | Orion | £ 47,648,728 | |
| 13042 | orm | £ 413,783,803 | |
| 13043 | orming | £ 109,142,927 | |
| 13044 | OronzoMafia | £ 5,474,161 | |
| 13045 | Orphans Court | £ 210,638,022 | |
| 13046 | Orphic Co. | £ 4,423,125 | |
| 13047 | Orquinox Co. | £ 1,119 | |
| 13048 | Orricks IT Services | £ 15,082,611 | |
| 13049 | Ortcaj | £ 77,296,813 | |
| 13050 | Orthanc Inc. | £ 147,448,563 | |
| 13051 | Osaka | £ 5,504,057 | |
| 13052 | Osakin | £ 6,161,131 | |
| 13053 | osca-websites | £ 9,181,996 | |
| 13054 | Oscar Meyer | £ 5,773,809 | |
| 13055 | Oscorp Industries | £ 179,374 | |
| 13056 | OSE | £ 9,332,004 | |
| 13057 | OSHA Six Flags | £ 5,346,082 | |
| 13058 | Osho | £ 4,055,871 | |
| 13059 | Osipolis | £ 16,660,041 | |
| 13060 | Osiris | £ 225,126,101 | |
| 13061 | osiris666 | £ -1,880,407 | |
| 13062 | osiris6971 | £ 10,377,105 | |
| 13063 | Osmosis | £ 36,967,752 | |
| 13064 | Osprey Close | £ 53,590,765 | |
| 13065 | other comps | £ 622,371,564 | |
| 13066 | Other Reality | £ 4,518,202 | |
| 13067 | Otherones | £ 61,853,286 | |
| 13068 | Others | £ 26,039,960 | |
| 13069 | otherwil | £ 133,717 | |
| 13070 | otherwil2 | £ -34,567,223 | |
| 13071 | otherwil3 | £ 1,893,225 | |
| 13072 | otherwil4 | £ 4,826,025 | |
| 13073 | otherwil5 | £ 829,030 | |
| 13074 | Ottawa | £ 44,778,874 | |
| 13075 | Otto | £ 511,521,836 | |
| 13076 | Ottoman Empire | £ 56,887,049 | |
| 13077 | OU812 | £ 295,697,174 | |
| 13078 | OuCh | £ 60,253,224 | |
| 13079 | Ouija Industries | £ 345,812 | |
| 13080 | our butterfly | £ 1,134,896,288 | |
| 13081 | Our Discontent | £ 5,507,855 | |
| 13082 | Our Dollar | £ 173,827,178 | |
| 13083 | Our Doorstep | £ 1,396,159 | |
| 13084 | Our Golden Years | £ 908,659,300 | |
| 13085 | Our Good Name | £ 571,345,968 | |
| 13086 | Our Happy Memories | £ 34,408,558 | |
| 13087 | our judgement | £ 621,639,331 | |
| 13088 | our lifes | £ 416,260,440 | |
| 13089 | Our Lives | £ 60,309,789 | |
| 13090 | our Lord | £ 5,790,277 | |
| 13091 | Our Loved Ones | £ 106,677,737 | |
| 13092 | Our Times | £ 1,742,749 | |
| 13093 | Ours | £ 191,746,347 | |
| 13094 | Ourselves | £ 91,484,866 | |
| 13095 | out | £ 85,981,569 | |
| 13096 | Out of Nothing | £ 1,503,708 | |
| 13097 | Out Of The Blue | £ 946,989,643 | |
| 13098 | Out of town | £ 586,926 | |
| 13099 | Out You Go | £ 39,675,860 | |
| 13100 | outbreak | £ 561,418,136 | |
