The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 16401 | Ordinance | £ 12,412,156 | |
| 16402 | ordinary matter | £ 332,622,782 | |
| 16403 | Oregon | £ 116,158,287 | |
| 16404 | OREO | £ 64,657,012 | |
| 16405 | Org | £ 18,286,924 | |
| 16406 | Organic Fruits and Veggy | £ 23,175,728 | |
| 16407 | Organics Ltd | £ 105,054,559 | |
| 16408 | Organised | £ 47,221,717 | |
| 16409 | Organised Crime | £ 17,216,443 | |
| 16410 | Organised.net | £ 55,489,672 | |
| 16411 | Organized Crime | £ 62,808,878 | |
| 16412 | Orgia Co. | £ 4,887,593 | |
| 16413 | Orgy | £ 6,097,495,134 | |
| 16414 | Origin | £ 1,773,044,314 | |
| 16415 | Original 16 | £ 174,342,608 | |
| 16416 | Original Gangster | £ 120,299,845 | |
| 16417 | Original Sin | £ 144,878,801 | |
| 16418 | Original Taste | £ 47,942,688 | |
| 16419 | Original Thoughts | £ 107,331,125 | |
| 16420 | Originality | £ 2,404,207,968 | |
| 16421 | Origins | £ 63,035,912 | |
| 16422 | Orino | £ 56,346,103 | |
| 16423 | Orion | £ 47,648,728 | |
| 16424 | Orion. | £ 374,172,630 | |
| 16425 | Orleans | £ 102,660,211 | |
| 16426 | orm | £ 2,684,322,281 | |
| 16427 | orming | £ 84,475,985 | |
| 16428 | Ornate | £ -8,047,867 | |
| 16429 | Orome Aldaron | £ 1,531,184,473 | |
| 16430 | OronzoMafia | £ 5,474,161 | |
| 16431 | Orphans Court | £ 297,981,744 | |
| 16432 | Orpheus | £ 288,236,792 | |
| 16433 | Orphic Co. | £ 4,423,125 | |
| 16434 | Orquinox Co. | £ 1,119 | |
| 16435 | Orricks IT Services | £ 15,082,611 | |
| 16436 | Ortcaj | £ 77,296,813 | |
| 16437 | Orthanc Inc. | £ 147,448,563 | |
| 16438 | Osaka | £ 5,504,057 | |
| 16439 | Osakin | £ 6,161,131 | |
| 16440 | Osbourne | £ 1,744,973 | |
| 16441 | osca-websites | £ 9,181,996 | |
| 16442 | Oscar Meyer | £ 5,773,809 | |
| 16443 | Oscars Emporium | £ 148,690,217 | |
| 16444 | Oscillation | £ 3,001,978 | |
| 16445 | Oscorp Industries | £ 179,374 | |
| 16446 | OSHA | £ 1,501,093 | |
| 16447 | OSHA Six Flags | £ 5,346,082 | |
| 16448 | Osipolis | £ 16,660,041 | |
| 16449 | Osiris | £ 225,126,101 | |
| 16450 | osiris666 | £ -1,880,407 | |
| 16451 | osiris6971 | £ 50,840,965 | |
| 16452 | Oslo | £ 9,880,014 | |
| 16453 | Osmosis | £ 41,633,292 | |
| 16454 | Osprey Close | £ 53,590,765 | |
| 16455 | Othello | £ 79,511,406 | |
| 16456 | other comps | £ 286,021,008 | |
| 16457 | Other People | £ 13,401,058 | |
| 16458 | Others | £ 26,039,960 | |
| 16459 | Others sometimes | £ 65,359,099 | |
| 16460 | otherwil | £ 133,717 | |
| 16461 | otherwil2 | £ -34,567,223 | |
| 16462 | otherwil3 | £ 1,893,225 | |
| 16463 | otherwil4 | £ 4,826,025 | |
| 16464 | otherwil5 | £ 829,030 | |
| 16465 | Ottawa | £ 44,778,874 | |
| 16466 | Ottoman Empire | £ 56,887,049 | |
| 16467 | OU812 | £ 295,697,174 | |
| 16468 | Ouija Industries | £ 345,812 | |
| 16469 | our butterfly | £ 1,134,896,288 | |
| 16470 | our differences | £ 302,439,939 | |
| 16471 | Our Discontent | £ 5,507,855 | |
| 16472 | Our Fathers | £ 116,143,694 | |
| 16473 | Our Golden Years | £ 908,659,300 | |
| 16474 | Our Good Name | £ 571,345,968 | |
| 16475 | Our Happy Memories | £ 34,408,558 | |
| 16476 | our judgement | £ 621,639,331 | |
| 16477 | our lifes | £ 464,291,926 | |
| 16478 | Our Lives | £ 60,309,789 | |
| 16479 | Our Times | £ 1,742,749 | |
| 16480 | our universe | £ 611,100,154 | |
| 16481 | our ways | £ 162,798 | |
| 16482 | Ours | £ 1,053,657,782 | |
| 16483 | Ourselves | £ 91,484,866 | |
| 16484 | out | £ 85,981,569 | |
| 16485 | out of my face | £ 581,084,624 | |
| 16486 | Out of Nothing | £ 6,356,430 | |
| 16487 | Out Of The Blue | £ 946,989,643 | |
| 16488 | Outcomes | £ 1,504,717 | |
| 16489 | Outer Heaven | £ 58,665,319 | |
| 16490 | Outlandish Labs LLC | £ 1,478,185 | |
| 16491 | Outletsales | £ 1,793,596 | |
| 16492 | outlook responding | £ 712,209,786 | |
| 16493 | Outrageous Fortune | £ 210,155,594 | |
| 16494 | Outside Space | £ 6,959,307 | |
| 16495 | Outside the square | £ 192,468,317 | |
| 16496 | Outsourcing LLC | £ 4,372,708 | |
| 16497 | Outtathisworld plc | £ 1,236,092 | |
| 16498 | Ovation | £ 2,547,061 | |
| 16499 | over educated idiots | £ 146,119,750 | |
| 16500 | Over grown bush | £ 175,719,320 | |
