The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 12101 | Obtuse | £ 14,379,095 | |
| 12102 | Obviously | £ 2,318,576,665 | |
| 12103 | OCB inc | £ 6,320,804 | |
| 12104 | Occasional Tables | £ 5,328,203 | |
| 12105 | Ocean | £ 52,827,866 | |
| 12106 | ocean star | £ 3,580,849,318 | |
| 12107 | Oceanic Enterprises | £ -50,808 | |
| 12108 | Oceans 11 | £ 58,500,636 | |
| 12109 | Oceans 12 | £ 10,291,638 | |
| 12110 | Oceans 13 | £ 132,219,759 | |
| 12111 | Oceans Eleven | £ 8,485,684 | |
| 12112 | Ocelot | £ 194,460,230 | |
| 12113 | Och Noooo | £ 1,506,119 | |
| 12114 | Octavian | £ 4,631,188 | |
| 12115 | October 2014 | £ 94,385,046 | |
| 12116 | Octopia | £ 9,626,521 | |
| 12117 | Octopus Garden | £ 4,050,927 | |
| 12118 | Oddjob | £ 16,604,273 | |
| 12119 | Odds on Favorite | £ 74,346,727 | |
| 12120 | Oddysay | £ 2,896,867 | |
| 12121 | Odell | £ 13,714,064 | |
| 12122 | Oden | £ 641,394,649 | |
| 12123 | oden wrath | £ 1,166,554,403 | |
| 12124 | odin | £ 8,811,968 | |
| 12125 | Odin Mafia | £ 8,768,668 | |
| 12126 | Odin the Wanderer | £ 4,687,105 | |
| 12127 | Odo | £ 32,513,900 | |
| 12128 | Odqan | £ 246,348,729 | |
| 12129 | Odyssey | £ 329,493,997 | |
| 12130 | of a black widow | £ 196,069,515 | |
| 12131 | Of a Brutal Empire | £ 36,359,377 | |
| 12132 | of a Solar Empire | £ 46,660,163 | |
| 12133 | Of All Your Land | £ 48,121,892 | |
| 12134 | Of Bomb | £ 5,131,350 | |
| 12135 | of CFC | £ 5,455,120 | |
| 12136 | of Elm Street | £ 49,875 | |
| 12137 | Of Every Position | £ 61,887,884 | |
| 12138 | Of Friday the 13th | £ 50,000 | |
| 12139 | Of Green Bay | £ 7,216,016 | |
| 12140 | of Impendium | £ 349,441 | |
| 12141 | of Long Stockings | £ 16,738,335 | |
| 12142 | Of Minisotta | £ 1,716,607 | |
| 12143 | Of My Label | £ 241,830,978 | |
| 12144 | of of | £ 7,075,463 | |
| 12145 | of REASON | £ 1,154,429 | |
| 12146 | of RHC | £ 68,042,901 | |
| 12147 | Of Scotland | £ 1,304,795,018 | |
| 12148 | of the devil | £ 27,539,344 | |
| 12149 | of The Hat | £ 5,507,097 | |
| 12150 | of the heap | £ 66,771,581 | |
| 12151 | of the lost | £ 69,257,675 | |
| 12152 | of the monsters | £ 41,126,098 | |
| 12153 | Of The Road | £ 146,979,140 | |
| 12154 | of the runite | £ 4,694,589 | |
| 12155 | Of The UVF | £ 133,321,393 | |
| 12156 | Of the world | £ 2,007,785 | |
| 12157 | Of Time | £ 372,360,923 | |
| 12158 | of. | £ 335,457,109 | |
| 12159 | Ofcom | £ 295,858,780 | |
| 12160 | Off | £ 25,794,080 | |
| 12161 | off it | £ 5,261,275 | |
| 12162 | Offenbach | £ 382,674,581 | |
| 12163 | Offensive Behaviour | £ 493,036,055 | |
| 12164 | office | £ 736,716,238 | |
| 12165 | Offroad Trucker | £ 272,091,781 | |
| 12166 | Offshore | £ 367,643,133 | |
| 12167 | Offshore Accounts | £ 140,823,548 | |
| 12168 | Offshore Cash | £ 60,279,702 | |
| 12169 | og esaelP | £ 4,208,484 | |
| 12170 | ogkush | £ 2,491,394 | |
| 12171 | Ogrimmar | £ 35,379,515 | |
| 12172 | Oh Herro | £ 2,995,837 | |
| 12173 | Oh Jesus Christ | £ 9,142,153 | |
| 12174 | Oh No | £ 105,351,540 | |
| 12175 | Oh YEAH | £ 2,549,726 | |
| 12176 | ohara inc | £ -165,571 | |
| 12177 | ohe herrow | £ 5,703,509 | |
| 12178 | Ohnoitsmymothernlaw | £ 5,504,562 | |
| 12179 | Ohtaku inc | £ 3,600,029 | |
| 12180 | Ohtaku inc1 | £ 4,456,703 | |
| 12181 | Ohtaku inc2 | £ 1,267,353 | |
| 12182 | Ohtaku inc3 | £ 4,191,984 | |
| 12183 | Ohtaku inc4 | £ 4,118,968 | |
| 12184 | ohyesyesh | £ 50,000 | |
| 12185 | Oil | £ 833,968,470 | |
| 12186 | Oil CONGLOMO | £ 2,646,845 | |
| 12187 | Oil Field | £ 271,568 | |
| 12188 | Oil Inc | £ 1,596,655 | |
| 12189 | Oil Industry | £ 4,441,721 | |
| 12190 | Oil Rigger | £ 2,151,587,047 | |
| 12191 | Oilfield Industries | £ 9,854,297 | |
| 12192 | oiu | £ 5,498,037 | |
| 12193 | OJ da Juiceman | £ 109,855 | |
| 12194 | OK Tom | £ 117,936,455 | |
| 12195 | OKFurniture | £ 50,000 | |
| 12196 | OKG Shed | £ -329,334 | |
| 12197 | OKS 1 PTE LTD | £ 50,000 | |
| 12198 | OKS PTE LTD | £ 2,148,676 | |
| 12199 | OLafa | £ 5,088,982 | |
| 12200 | Oland Ltd | £ 50,000 | |
