The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 16601 | Oregon | £ 111,775,168 | |
| 16602 | OREO | £ 64,657,012 | |
| 16603 | Org | £ 18,286,924 | |
| 16604 | Organic Fruits and Veggy | £ 23,175,728 | |
| 16605 | Organics Ltd | £ 105,054,559 | |
| 16606 | Organised | £ 17,218,389 | |
| 16607 | Organised Crime | £ 17,216,443 | |
| 16608 | Organised.net | £ 55,489,672 | |
| 16609 | Organized Crime | £ 62,808,878 | |
| 16610 | Orgia Co. | £ 4,887,593 | |
| 16611 | Orgy | £ 6,092,194,361 | |
| 16612 | Origin | £ 1,771,248,971 | |
| 16613 | Origin yartley | £ 37,041,694 | |
| 16614 | Original 16 | £ 174,342,608 | |
| 16615 | Original Gangster | £ 57,314,245 | |
| 16616 | Original Sin | £ 144,878,801 | |
| 16617 | Original Taste | £ 47,942,688 | |
| 16618 | Original Thoughts | £ 150,681,963 | |
| 16619 | Originality | £ 2,404,207,968 | |
| 16620 | Origins | £ 63,035,912 | |
| 16621 | Orino | £ 56,346,103 | |
| 16622 | Orion | £ 47,648,728 | |
| 16623 | Orion. | £ 374,172,630 | |
| 16624 | Orleans | £ 56,160,211 | |
| 16625 | orm | £ 2,684,322,281 | |
| 16626 | orming | £ 84,475,985 | |
| 16627 | Ornamental Knights | £ 3,129,157 | |
| 16628 | Ornate | £ -8,047,867 | |
| 16629 | Orome Aldaron | £ 1,531,184,473 | |
| 16630 | OronzoMafia | £ 5,474,161 | |
| 16631 | Orphans Court | £ 297,981,744 | |
| 16632 | Orpheus | £ 288,236,792 | |
| 16633 | Orphic Co. | £ 4,423,125 | |
| 16634 | Orquinox Co. | £ 1,119 | |
| 16635 | Orricks IT Services | £ 15,082,611 | |
| 16636 | Ortcaj | £ 77,296,813 | |
| 16637 | Orthanc Inc. | £ 147,448,563 | |
| 16638 | Osaka | £ 5,504,057 | |
| 16639 | Osakin | £ 6,161,131 | |
| 16640 | Osbourne | £ 1,744,973 | |
| 16641 | osca-websites | £ 9,181,996 | |
| 16642 | Oscar Meyer | £ 5,773,809 | |
| 16643 | Oscars Emporium | £ 148,690,217 | |
| 16644 | Oscillation | £ 3,001,978 | |
| 16645 | Oscorp Industries | £ 179,374 | |
| 16646 | OSHA | £ 3,192,238 | |
| 16647 | OSHA Six Flags | £ 5,346,082 | |
| 16648 | Osipolis | £ 16,660,041 | |
| 16649 | Osiris | £ 225,126,101 | |
| 16650 | osiris666 | £ -1,880,407 | |
| 16651 | osiris6971 | £ 50,840,965 | |
| 16652 | Oslo | £ 9,880,014 | |
| 16653 | Osmosis | £ 41,633,292 | |
| 16654 | Osprey Close | £ 53,590,765 | |
| 16655 | ossiary | £ 18,019,777 | |
| 16656 | Othello | £ 79,511,406 | |
| 16657 | other comps | £ 286,021,008 | |
| 16658 | Other People | £ 31,175,138 | |
| 16659 | Others | £ 26,039,960 | |
| 16660 | Others sometimes | £ 65,359,099 | |
| 16661 | otherwil | £ 133,717 | |
| 16662 | otherwil2 | £ -34,567,223 | |
| 16663 | otherwil3 | £ 1,893,225 | |
| 16664 | otherwil4 | £ 4,826,025 | |
| 16665 | otherwil5 | £ 829,030 | |
| 16666 | Ottawa | £ 44,778,874 | |
| 16667 | Otter | £ 43,181,655 | |
| 16668 | Ottoman Empire | £ 56,887,049 | |
| 16669 | OU812 | £ 295,697,174 | |
| 16670 | Ouija Industries | £ 345,812 | |
| 16671 | our butterfly | £ 1,134,896,288 | |
| 16672 | our differences | £ 302,748,084 | |
| 16673 | Our Discontent | £ 5,507,855 | |
| 16674 | Our Fathers | £ 116,143,694 | |
| 16675 | Our Golden Years | £ 908,659,300 | |
| 16676 | Our Good Name | £ 571,345,968 | |
| 16677 | Our Happy Memories | £ 34,408,558 | |
| 16678 | our judgement | £ 621,639,331 | |
| 16679 | our lifes | £ 464,291,926 | |
| 16680 | Our Lives | £ 60,309,789 | |
| 16681 | Our Times | £ 1,742,749 | |
| 16682 | our universe | £ 611,100,154 | |
| 16683 | Ours | £ 987,657,782 | |
| 16684 | Ourselves | £ 91,484,866 | |
| 16685 | out | £ 85,981,569 | |
| 16686 | out of my face | £ 581,084,624 | |
| 16687 | Out of Nothing | £ 6,356,430 | |
| 16688 | Out Of The Blue | £ 946,989,643 | |
| 16689 | Out You Go | £ 39,675,860 | |
| 16690 | Outer Heaven | £ 58,665,319 | |
| 16691 | Outlandish Labs LLC | £ 1,478,185 | |
| 16692 | Outlaw | £ 10,047,120 | |
| 16693 | Outletsales | £ 1,793,596 | |
| 16694 | outlook responding | £ 562,278,833 | |
| 16695 | Outrageous Fortune | £ 210,155,594 | |
| 16696 | Outside Space | £ 6,959,307 | |
| 16697 | Outside the square | £ 192,266,090 | |
| 16698 | Outsourcing LLC | £ 4,372,708 | |
| 16699 | Outtathisworld plc | £ 1,236,092 | |
| 16700 | Ovation | £ 2,547,061 | |
