The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 15301 | osca-websites | £ 9,181,996 | |
| 15302 | Oscar | £ 2,959,610 | |
| 15303 | Oscar Meyer | £ 5,773,809 | |
| 15304 | Oscillation | £ 3,001,978 | |
| 15305 | Oscorp Industries | £ 179,374 | |
| 15306 | OSHA Six Flags | £ 5,346,082 | |
| 15307 | Osho | £ 4,055,871 | |
| 15308 | Osipolis | £ 16,660,041 | |
| 15309 | Osiris | £ 225,126,101 | |
| 15310 | osiris666 | £ -1,880,407 | |
| 15311 | osiris6971 | £ 24,737,778 | |
| 15312 | Oslo | £ 9,880,014 | |
| 15313 | Osmosis | £ 41,633,292 | |
| 15314 | Osprey Close | £ 53,590,765 | |
| 15315 | other comps | £ 286,021,008 | |
| 15316 | Other Reality | £ 4,518,202 | |
| 15317 | Otherones | £ 61,853,286 | |
| 15318 | Others | £ 26,039,960 | |
| 15319 | Others sometimes | £ 65,359,099 | |
| 15320 | otherwil | £ 133,717 | |
| 15321 | otherwil2 | £ -34,567,223 | |
| 15322 | otherwil3 | £ 1,893,225 | |
| 15323 | otherwil4 | £ 4,826,025 | |
| 15324 | otherwil5 | £ 829,030 | |
| 15325 | Ottawa | £ 44,778,874 | |
| 15326 | Otto | £ 511,521,836 | |
| 15327 | Ottoman Empire | £ 56,887,049 | |
| 15328 | OU812 | £ 295,697,174 | |
| 15329 | OuCh | £ 54,130,309 | |
| 15330 | Ouija Industries | £ 345,812 | |
| 15331 | our butterfly | £ 1,134,896,288 | |
| 15332 | our differences | £ 191,870,881 | |
| 15333 | Our Discontent | £ 5,507,855 | |
| 15334 | Our Doorstep | £ 1,396,159 | |
| 15335 | Our Golden Years | £ 908,659,300 | |
| 15336 | Our Good Name | £ 571,345,968 | |
| 15337 | Our Happy Memories | £ 34,408,558 | |
| 15338 | our judgement | £ 621,639,331 | |
| 15339 | our lifes | £ 464,291,926 | |
| 15340 | Our Lives | £ 60,309,789 | |
| 15341 | our Lord | £ 5,790,277 | |
| 15342 | Our Nations Capitol | £ 289,818,140 | |
| 15343 | Our Times | £ 1,742,749 | |
| 15344 | Ours | £ 196,143,368 | |
| 15345 | Ourselves | £ 91,484,866 | |
| 15346 | out | £ 85,981,569 | |
| 15347 | Out of Nothing | £ 6,356,430 | |
| 15348 | Out Of The Blue | £ 946,989,643 | |
| 15349 | Out of town | £ 586,926 | |
| 15350 | Out You Go | £ 39,675,860 | |
| 15351 | outbreak | £ 561,418,136 | |
| 15352 | Outer Heaven | £ 58,665,319 | |
| 15353 | Outlandish Labs LLC | £ 1,478,185 | |
| 15354 | Outlaw | £ 10,047,120 | |
| 15355 | Outletsales | £ 1,793,596 | |
| 15356 | Outrageous Fortune | £ 210,155,594 | |
| 15357 | Outsourcing LLC | £ 4,372,708 | |
| 15358 | Outtathisworld plc | £ 1,236,092 | |
| 15359 | Ovation | £ 2,547,061 | |
| 15360 | Over A Pub | £ 97,048,135 | |
| 15361 | Over grown bush | £ 118,980,186 | |
| 15362 | Over Priced | £ 73,067,141 | |
| 15363 | overflowing bog | £ 11,871,021 | |
| 15364 | overHelming | £ 491,414,184 | |
| 15365 | Overmeire | £ 5,506,415 | |
| 15366 | Overpoort | £ 2,764,404 | |
| 15367 | Overpovered | £ 1,092,543 | |
| 15368 | Override | £ 17,139,813 | |
| 15369 | OverThor | £ 5,507,873 | |
| 15370 | Overwatch | £ 215,454,246 | |
| 15371 | Overwatch LTD | £ 57,470,387 | |
| 15372 | Overwhelming | £ 60,011,188 | |
| 15373 | Ovine Flu | £ 48,800,052 | |
| 15374 | ow3n pte ltd | £ 3,307,504 | |
| 15375 | Owens Enterprise | £ 1,346,837,431 | |
| 15376 | Owl | £ 237,452,023 | |
| 15377 | Owls | £ 425,596,680 | |
| 15378 | owned | £ 5,486,100 | |
| 15379 | Owned2EU | £ -76,039,189 | |
| 15380 | Owned3EU | £ 2,813,019 | |
| 15381 | Owned4EU | £ -11,748,456 | |
| 15382 | Owner | £ 6,354,110 | |
| 15383 | Ownership | £ 61,966,985 | |
| 15384 | Owning This Land | £ -869,747 | |
| 15385 | oWoTYRANNYoWo | £ 45,695,869 | |
| 15386 | OWWWW | £ 5,508,284 | |
| 15387 | Oxcide | £ 12,818,579 | |
| 15388 | Oxford | £ 205,487,202 | |
| 15389 | OXO | £ 627,787,564 | |
| 15390 | Oxtail Soup | £ 54,004,888 | |
| 15391 | Oxy Clean | £ 71,691,928 | |
| 15392 | Oxyacetylene | £ 3,351,491 | |
| 15393 | OXYCODONE | £ 2,160,503,188 | |
| 15394 | Oxygen | £ 215,261,376 | |
| 15395 | Oxymoronisms | £ 1,393,034,816 | |
| 15396 | Oz and Goodwin | £ 4,583,012 | |
| 15397 | Oz. | £ 745,495,233 | |
| 15398 | OZ0.0 | £ 25,946,570 | |
| 15399 | OZ0.1 | £ 33,827,950 | |
| 15400 | OZ0.2 | £ 9,703,588 | |
