The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 16401 | Organised.net | £ 55,489,672 | |
| 16402 | Organized Crime | £ 62,808,878 | |
| 16403 | Orgia Co. | £ 4,887,593 | |
| 16404 | Orgy | £ 6,092,194,361 | |
| 16405 | Origin | £ 1,773,257,494 | |
| 16406 | Origin yartley | £ 37,041,694 | |
| 16407 | Original 16 | £ 174,342,608 | |
| 16408 | Original Gangster | £ 55,709,955 | |
| 16409 | Original Sin | £ 144,878,801 | |
| 16410 | Original Taste | £ 47,942,688 | |
| 16411 | Original Thoughts | £ 294,388,269 | |
| 16412 | Originality | £ 2,404,207,968 | |
| 16413 | Origins | £ 63,035,912 | |
| 16414 | Orino | £ 56,346,103 | |
| 16415 | Orion | £ 47,648,728 | |
| 16416 | Orion. | £ 374,172,630 | |
| 16417 | Orleans | £ 56,160,211 | |
| 16418 | orm | £ 2,684,322,281 | |
| 16419 | orming | £ 78,183,938 | |
| 16420 | Ornamental Knights | £ 3,129,157 | |
| 16421 | Ornate | £ -8,047,867 | |
| 16422 | Orome Aldaron | £ 1,531,184,473 | |
| 16423 | OronzoMafia | £ 5,474,161 | |
| 16424 | Orphans Court | £ 297,981,744 | |
| 16425 | Orpheus | £ 288,236,792 | |
| 16426 | Orphic Co. | £ 4,423,125 | |
| 16427 | Orquinox Co. | £ 1,119 | |
| 16428 | Orricks IT Services | £ 15,082,611 | |
| 16429 | Ortcaj | £ 77,296,813 | |
| 16430 | Orthanc Inc. | £ 147,448,563 | |
| 16431 | Osaka | £ 5,504,057 | |
| 16432 | Osakin | £ 6,161,131 | |
| 16433 | Osbourne | £ 1,744,973 | |
| 16434 | osca-websites | £ 9,181,996 | |
| 16435 | Oscar Meyer | £ 5,773,809 | |
| 16436 | Oscars Emporium | £ 148,690,217 | |
| 16437 | Oscillation | £ 3,001,978 | |
| 16438 | Oscorp Industries | £ 179,374 | |
| 16439 | OSHA Six Flags | £ 5,346,082 | |
| 16440 | Osipolis | £ 16,660,041 | |
| 16441 | Osiris | £ 225,126,101 | |
| 16442 | osiris666 | £ -1,880,407 | |
| 16443 | osiris6971 | £ 50,840,965 | |
| 16444 | Oslo | £ 9,880,014 | |
| 16445 | Osmosis | £ 41,633,292 | |
| 16446 | Osprey Close | £ 53,590,765 | |
| 16447 | ossiary | £ 18,019,777 | |
| 16448 | Othello | £ 79,511,406 | |
| 16449 | other comps | £ 286,021,008 | |
| 16450 | Other People | £ 45,611,558 | |
| 16451 | Others | £ 26,039,960 | |
| 16452 | Others sometimes | £ 65,359,099 | |
| 16453 | otherwil | £ 133,717 | |
| 16454 | otherwil2 | £ -34,567,223 | |
| 16455 | otherwil3 | £ 1,893,225 | |
| 16456 | otherwil4 | £ 4,826,025 | |
| 16457 | otherwil5 | £ 829,030 | |
| 16458 | Ottawa | £ 44,778,874 | |
| 16459 | Otter | £ 43,181,655 | |
| 16460 | Ottoman Empire | £ 56,887,049 | |
| 16461 | OU812 | £ 295,697,174 | |
| 16462 | Ouija Industries | £ 345,812 | |
| 16463 | our butterfly | £ 1,134,896,288 | |
| 16464 | our differences | £ 299,738,235 | |
| 16465 | Our Discontent | £ 5,507,855 | |
| 16466 | Our Fathers | £ 116,143,694 | |
| 16467 | Our Golden Years | £ 908,659,300 | |
| 16468 | Our Good Name | £ 571,345,968 | |
| 16469 | Our Happy Memories | £ 34,408,558 | |
| 16470 | our judgement | £ 621,639,331 | |
| 16471 | our lifes | £ 464,291,926 | |
| 16472 | Our Lives | £ 60,309,789 | |
| 16473 | our Lord | £ 5,790,277 | |
| 16474 | Our Times | £ 1,742,749 | |
| 16475 | our universe | £ 611,100,154 | |
| 16476 | Ours | £ 765,657,782 | |
| 16477 | Ourselves | £ 91,484,866 | |
| 16478 | out | £ 85,981,569 | |
| 16479 | out of my face | £ 581,084,624 | |
| 16480 | Out of Nothing | £ 6,356,430 | |
| 16481 | Out Of The Blue | £ 946,989,643 | |
| 16482 | Out You Go | £ 39,675,860 | |
| 16483 | Outer Heaven | £ 58,665,319 | |
| 16484 | Outlandish Labs LLC | £ 1,478,185 | |
| 16485 | Outlaw | £ 10,047,120 | |
| 16486 | Outletsales | £ 1,793,596 | |
| 16487 | outlook responding | £ 496,463,856 | |
| 16488 | Outrageous Fortune | £ 210,155,594 | |
| 16489 | Outside Space | £ 6,959,307 | |
| 16490 | Outside the square | £ 180,586,429 | |
| 16491 | Outsourcing LLC | £ 4,372,708 | |
| 16492 | Outtathisworld plc | £ 1,236,092 | |
| 16493 | Ovation | £ 2,547,061 | |
| 16494 | over educated idiots | £ 145,234,549 | |
| 16495 | Over grown bush | £ 175,719,320 | |
| 16496 | Over Priced | £ 73,067,141 | |
| 16497 | Overclocked RAM | £ 19,524,164 | |
| 16498 | Overdrive | £ 104,717,990 | |
| 16499 | overHelming | £ 491,414,184 | |
| 16500 | Overmeire | £ 5,506,415 | |
