The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 12101 | Order | £ 176,233,665 | |
| 12102 | Oregon | £ 111,775,168 | |
| 12103 | OREO | £ 64,657,012 | |
| 12104 | Org | £ 18,286,924 | |
| 12105 | Organics Ltd | £ 105,054,559 | |
| 12106 | Organised Crime | £ 17,216,443 | |
| 12107 | Organized Crime | £ 62,808,878 | |
| 12108 | Orgia Co. | £ 4,887,593 | |
| 12109 | Orgy | £ 4,311,652,261 | |
| 12110 | Origin yartley | £ 37,041,694 | |
| 12111 | Original 16 | £ 132,618,089 | |
| 12112 | Original Sin | £ 141,442,446 | |
| 12113 | Originality | £ 1,357,128,017 | |
| 12114 | Origins | £ 63,035,912 | |
| 12115 | Orion | £ 47,648,728 | |
| 12116 | orm | £ 880,476,720 | |
| 12117 | orming | £ 51,578,525 | |
| 12118 | OronzoMafia | £ 560,700 | |
| 12119 | Orphans Court | £ 18,746,350 | |
| 12120 | Orphic Co. | £ 4,423,125 | |
| 12121 | Orquinox Co. | £ 1,119 | |
| 12122 | Orricks IT Services | £ 15,082,611 | |
| 12123 | Ortcaj | £ 77,296,813 | |
| 12124 | Orthanc Inc. | £ 147,448,563 | |
| 12125 | Osaka | £ 5,504,057 | |
| 12126 | Osakin | £ 6,161,131 | |
| 12127 | osca-websites | £ 9,181,996 | |
| 12128 | Oscar Meyer | £ 5,773,809 | |
| 12129 | Oscorp Industries | £ 179,374 | |
| 12130 | Osipolis | £ 16,660,041 | |
| 12131 | Osiris | £ 225,126,101 | |
| 12132 | osiris666 | £ -1,880,407 | |
| 12133 | Osmosis | £ 36,967,752 | |
| 12134 | Osprey Close | £ 53,590,765 | |
| 12135 | other comps | £ 171,188,256 | |
| 12136 | Otherones | £ 61,853,286 | |
| 12137 | Others | £ 26,039,960 | |
| 12138 | otherwil | £ 133,717 | |
| 12139 | otherwil2 | £ -34,567,223 | |
| 12140 | otherwil3 | £ 1,893,225 | |
| 12141 | otherwil4 | £ 4,826,025 | |
| 12142 | otherwil5 | £ 829,030 | |
| 12143 | Ottawa | £ 44,778,874 | |
| 12144 | Otto | £ 511,521,836 | |
| 12145 | OU812 | £ 294,106,966 | |
| 12146 | Ouija Industries | £ 345,812 | |
| 12147 | our butterfly | £ 1,134,896,288 | |
| 12148 | Our Discontent | £ 5,507,855 | |
| 12149 | Our Dollar | £ 173,827,178 | |
| 12150 | Our Doorstep | £ 1,396,159 | |
| 12151 | Our Golden Years | £ 901,793,347 | |
| 12152 | Our Good Name | £ 571,345,968 | |
| 12153 | Our Happy Memories | £ 34,408,558 | |
| 12154 | our judgement | £ 621,639,331 | |
| 12155 | our lifes | £ 53,601,603 | |
| 12156 | Our Lives | £ 60,309,789 | |
| 12157 | our Lord | £ 5,790,277 | |
| 12158 | Our Loved Ones | £ 106,677,737 | |
| 12159 | Our Times | £ 1,742,749 | |
| 12160 | Ours | £ 191,746,347 | |
| 12161 | Ourselves | £ 91,484,866 | |
| 12162 | out | £ 85,981,569 | |
| 12163 | Out of Nothing | £ 1,503,708 | |
| 12164 | Out Of The Blue | £ 479,649,866 | |
| 12165 | Out of town | £ 586,926 | |
| 12166 | Out You Go | £ 39,675,860 | |
| 12167 | outbreak | £ 561,418,136 | |
| 12168 | Outer Haven | £ 1,440,720 | |
| 12169 | Outer Heaven | £ 58,665,319 | |
| 12170 | Outlandish Labs LLC | £ 1,478,185 | |
| 12171 | Outlands | £ 155,639,513 | |
| 12172 | Outlaw | £ 4,594,026 | |
| 12173 | Outletsales | £ 1,793,596 | |
| 12174 | Outrageous Fortune | £ 210,155,594 | |
| 12175 | Outsourcing LLC | £ 4,372,708 | |
| 12176 | Outtathisworld plc | £ 1,236,092 | |
| 12177 | Outworld | £ 75,608,832 | |
| 12178 | Ovation | £ 2,547,061 | |
| 12179 | Over A Pub | £ 97,048,135 | |
| 12180 | Over Priced | £ 73,067,141 | |
| 12181 | overflowing bog | £ 11,871,021 | |
| 12182 | overHelming | £ 491,414,184 | |
| 12183 | Overmeire | £ 5,506,415 | |
| 12184 | Overpoort | £ 2,764,404 | |
| 12185 | Overpovered | £ 1,092,543 | |
| 12186 | Override | £ 17,139,813 | |
| 12187 | OverThor | £ 5,507,873 | |
| 12188 | Overwatch | £ 215,454,246 | |
| 12189 | Overwatch LTD | £ 57,470,387 | |
| 12190 | ow3n pte ltd | £ 3,307,504 | |
| 12191 | Owens Enterprise | £ 889,426,258 | |
| 12192 | OWLF | £ 2,914,903 | |
| 12193 | Owls | £ 425,596,680 | |
| 12194 | owned | £ 5,486,100 | |
| 12195 | Owned2EU | £ -76,039,189 | |
| 12196 | Owned3EU | £ 2,813,019 | |
| 12197 | Owned4EU | £ -11,748,456 | |
| 12198 | Owner | £ 6,354,110 | |
| 12199 | Owning This Land | £ -869,747 | |
| 12200 | oWoTYRANNYoWo | £ 324,471,185 | |
