The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 16101 | Ollio Inc. | £ 6,159,098 | |
| 16102 | Ollio2 Inc. | £ -2,232,039 | |
| 16103 | Ollio3 Inc. | £ -680,853 | |
| 16104 | Olrik | £ 22,147,425 | |
| 16105 | Olympia | £ 112,782,553 | |
| 16106 | olympic rings | £ 3,084,696,830 | |
| 16107 | Olympics | £ 5,508,747 | |
| 16108 | Olympus | £ 2,084,999,378 | |
| 16109 | OMD | £ 333,034,023 | |
| 16110 | Omega | £ 6,183,955 | |
| 16111 | Omega Indusries | £ 37,799 | |
| 16112 | OmegaFox Inc. | £ 1,266,634 | |
| 16113 | Omens | £ 1,374,401,102 | |
| 16114 | Omerta | £ 1,007,186,123 | |
| 16115 | Omerta Inc. | £ 5,500,096 | |
| 16116 | omission | £ 27,657,460 | |
| 16117 | Omni | £ 26,585,058 | |
| 16118 | Omni Consumer Products | £ 32,296,370 | |
| 16119 | Omni Future Corp 1 | £ 855,512,970 | |
| 16120 | omni4 | £ 1,185,151 | |
| 16121 | Omnia | £ 29,796,207 | |
| 16122 | OmniCorp | £ 5,503,691 | |
| 16123 | Omnifarious | £ 2,360,838,488 | |
| 16124 | Omnificent | £ 2,321,277,749 | |
| 16125 | Omnipotent | £ 2,218,375,349 | |
| 16126 | Omnipresent | £ 2,257,248,277 | |
| 16127 | Omniscient | £ 2,478,385,168 | |
| 16128 | Omnitool | £ 4,640,506 | |
| 16129 | on a stick | £ 13,410 | |
| 16130 | On Industries | £ 1,896,074 | |
| 16131 | On It | £ 59,533,659 | |
| 16132 | On My Mind | £ 87,748,385 | |
| 16133 | ON PATCHWERK | £ 399,366,790 | |
| 16134 | On Patrol | £ 148,087,996 | |
| 16135 | On the Buses | £ 8,916,615 | |
| 16136 | On The Fritz | £ 79,242,996 | |
| 16137 | On the move | £ 144,453,102 | |
| 16138 | on the road | £ 405,722,546 | |
| 16139 | on yourself | £ 126,998,452 | |
| 16140 | Once Upon a Time | £ 24,760,937 | |
| 16141 | Once Were Warriors | £ 54,754,263 | |
| 16142 | one | £ 341,379,992 | |
| 16143 | One and a Half | £ 8,610,014,000 | |
| 16144 | One Company | £ 398,709,264 | |
| 16145 | one dollar company | £ 40,885,349 | |
| 16146 | One Enterprise | £ 5,940,523 | |
| 16147 | One Eyed Three Leg Dog | £ 63,605,247 | |
| 16148 | One for the road | £ 4,034,190 | |
| 16149 | One gun | £ 1,381,284,458 | |
| 16150 | One Hit Wonder | £ 30,087,678 | |
| 16151 | One Hundred Netro Bucks | £ 132,828,467 | |
| 16152 | One Insane Rastaman | £ 273,250,880 | |
| 16153 | one love | £ 3,838,898 | |
| 16154 | one man crying | £ 1,050,939,923 | |
| 16155 | One Million | £ 3,647,091 | |
| 16156 | One Mind | £ -5,139,455 | |
| 16157 | one more wont hurt | £ 3,931,911 | |
| 16158 | one of craze | £ 398,067,001 | |
| 16159 | One Piece | £ 11,282,781 | |
| 16160 | One Piece. | £ 40,965,499 | |
| 16161 | One Pound Fish | £ 1,584,921 | |
| 16162 | One Pound Transfers | £ -2,799,952 | |
| 16163 | One Shot | £ 123,851,456 | |
| 16164 | One Silence | £ -4,074 | |
| 16165 | One to Many. | £ 4,976,234 | |
| 16166 | one too many pints | £ 136,670,878 | |
| 16167 | One United | £ 5,379,005 | |
| 16168 | OneHATE | £ 201,356,451 | |
| 16169 | Onenos | £ 216,301,381 | |
| 16170 | oneone | £ 18,206,569 | |
| 16171 | Oner | £ 10,516,756 | |
| 16172 | Onerous | £ 40,516,043 | |
| 16173 | OneStopEnvelopeShoppe | £ -38,952 | |
| 16174 | Onetical | £ 5,502,381 | |
| 16175 | Onioninc | £ -43,613 | |
| 16176 | Onions | £ 56,031,337 | |
| 16177 | ONLINE GAMES | £ 120,242,830 | |
| 16178 | online games. | £ 167,252,652 | |
| 16179 | Only 50k | £ 120,794,156 | |
| 16180 | Only Bombs Allowed | £ 57,741,277 | |
| 16181 | Only Fools and Horses | £ 859,719,219 | |
| 16182 | only me | £ 50,000 | |
| 16183 | only me inc | £ 133,078,068 | |
| 16184 | OnlyDollars | £ 929,042 | |
| 16185 | OnlyMoney | £ 4,556,121 | |
| 16186 | OnlyProfits | £ 5,059,024 | |
| 16187 | OnlyStocks | £ 4,382,795 | |
| 16188 | Onomatopoeias | £ 939,660 | |
| 16189 | Onshore Money | £ 104,918,400 | |
| 16190 | Onslaught | £ 98,490,553 | |
| 16191 | Ontara | £ 79,736,570 | |
| 16192 | Ontario | £ 159,783,223 | |
| 16193 | ontheblock | £ 6,402,837 | |
| 16194 | Onyx | £ 429,592 | |
| 16195 | OO7 | £ 24,682,212 | |
| 16196 | Oodnadatta | £ 2,300,000 | |
| 16197 | Ooglaigh na Heireann | £ 240,713,877 | |
| 16198 | oohyeaa | £ 50,844,745 | |
| 16199 | Oolacile-01 | £ 3,643,194 | |
| 16200 | oOoOo | £ 82,717,145 | |
