The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 16501 | Orpheus | £ 288,236,792 | |
| 16502 | Orphic Co. | £ 4,423,125 | |
| 16503 | Orquinox Co. | £ 1,119 | |
| 16504 | Orricks IT Services | £ 15,082,611 | |
| 16505 | Ortcaj | £ 77,296,813 | |
| 16506 | Orthanc Inc. | £ 147,448,563 | |
| 16507 | Osaka | £ 5,504,057 | |
| 16508 | Osakin | £ 6,161,131 | |
| 16509 | Osbourne | £ 1,744,973 | |
| 16510 | osca-websites | £ 9,181,996 | |
| 16511 | Oscar Meyer | £ 5,773,809 | |
| 16512 | Oscars Emporium | £ 148,690,217 | |
| 16513 | Oscillation | £ 3,001,978 | |
| 16514 | Oscorp Industries | £ 179,374 | |
| 16515 | OSHA | £ 5,807,587 | |
| 16516 | OSHA Six Flags | £ 5,346,082 | |
| 16517 | Osipolis | £ 16,660,041 | |
| 16518 | Osiris | £ 225,126,101 | |
| 16519 | osiris666 | £ -1,880,407 | |
| 16520 | osiris6971 | £ 50,840,965 | |
| 16521 | Oslo | £ 9,880,014 | |
| 16522 | Osmosis | £ 41,633,292 | |
| 16523 | Osprey Close | £ 53,590,765 | |
| 16524 | Othello | £ 79,511,406 | |
| 16525 | Other Companies | £ 4,713,708 | |
| 16526 | other comps | £ 286,021,008 | |
| 16527 | Other People | £ 12,169,340 | |
| 16528 | Others | £ 26,039,960 | |
| 16529 | Others sometimes | £ 65,359,099 | |
| 16530 | otherwil | £ 133,717 | |
| 16531 | otherwil2 | £ -34,567,223 | |
| 16532 | otherwil3 | £ 1,893,225 | |
| 16533 | otherwil4 | £ 4,826,025 | |
| 16534 | otherwil5 | £ 829,030 | |
| 16535 | Ottawa | £ 44,778,874 | |
| 16536 | Ottoman Empire | £ 56,887,049 | |
| 16537 | OU812 | £ 295,697,174 | |
| 16538 | Ouija Industries | £ 345,812 | |
| 16539 | our butterfly | £ 1,134,896,288 | |
| 16540 | our differences | £ 302,439,939 | |
| 16541 | Our Discontent | £ 5,507,855 | |
| 16542 | Our Fathers | £ 116,143,694 | |
| 16543 | Our Golden Years | £ 908,659,300 | |
| 16544 | Our Good Name | £ 571,345,968 | |
| 16545 | Our Happy Memories | £ 34,408,558 | |
| 16546 | our judgement | £ 621,639,331 | |
| 16547 | our lifes | £ 464,291,926 | |
| 16548 | Our Lives | £ 60,309,789 | |
| 16549 | Our Times | £ 1,742,749 | |
| 16550 | our universe | £ 611,100,154 | |
| 16551 | our ways | £ 6,620,081 | |
| 16552 | Ours | £ 1,053,657,782 | |
| 16553 | Ourselves | £ 91,484,866 | |
| 16554 | out | £ 85,981,569 | |
| 16555 | out of my face | £ 581,084,624 | |
| 16556 | Out of Nothing | £ 6,356,430 | |
| 16557 | Out Of The Blue | £ 946,989,643 | |
| 16558 | Outer Heaven | £ 58,665,319 | |
| 16559 | Outlandish Labs LLC | £ 1,478,185 | |
| 16560 | Outletsales | £ 1,793,596 | |
| 16561 | outlook responding | £ 709,596,257 | |
| 16562 | Outrageous Fortune | £ 210,155,594 | |
| 16563 | Outside Space | £ 6,959,307 | |
| 16564 | Outside the square | £ 202,329,406 | |
| 16565 | Outsourcing LLC | £ 4,372,708 | |
| 16566 | Outtathisworld plc | £ 1,236,092 | |
| 16567 | Ovation | £ 2,547,061 | |
| 16568 | over educated idiots | £ 145,384,969 | |
| 16569 | Over grown bush | £ 175,719,320 | |
| 16570 | Over Priced | £ 73,067,141 | |
| 16571 | Overclocked RAM | £ 51,978,581 | |
| 16572 | Overdrive | £ 104,717,990 | |
| 16573 | overHelming | £ 491,414,184 | |
| 16574 | Overkil | £ 252,941 | |
| 16575 | Overmeire | £ 5,506,415 | |
| 16576 | Overpaid Footballers | £ 4,493,822 | |
| 16577 | Overpoort | £ 2,764,404 | |
| 16578 | Override | £ 17,139,813 | |
| 16579 | overthinking | £ 10,529,502 | |
| 16580 | OverThor | £ 5,507,873 | |
| 16581 | Overwatch | £ 215,454,246 | |
| 16582 | Overwatch LTD | £ 57,470,387 | |
| 16583 | Overwhelming | £ 60,498,024 | |
| 16584 | Ovine Flu | £ 61,245,519 | |
| 16585 | ow3n pte ltd | £ 3,307,504 | |
| 16586 | Owens Enterprise | £ 1,508,540,262 | |
| 16587 | Owl | £ 237,452,023 | |
| 16588 | Owls | £ 425,596,680 | |
| 16589 | owned | £ 5,486,100 | |
| 16590 | Owned2EU | £ -76,039,189 | |
| 16591 | Owned3EU | £ 2,813,019 | |
| 16592 | Owned4EU | £ -11,748,456 | |
| 16593 | Owner | £ 6,354,110 | |
| 16594 | Ownership | £ 167,326,629 | |
| 16595 | oWoTYRANNYoWo | £ 203,314,128 | |
| 16596 | OWWWW | £ 5,508,284 | |
| 16597 | Oxcide | £ 12,818,579 | |
| 16598 | Oxford | £ 205,487,202 | |
| 16599 | OXO | £ 837,256,967 | |
| 16600 | Oxtail Soup | £ 64,738,096 | |
