The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 15001 | Original 16 | £ 174,342,608 | |
| 15002 | Original Gangster | £ 40,967,669 | |
| 15003 | Original Sin | £ 144,878,801 | |
| 15004 | Originality | £ 2,404,207,968 | |
| 15005 | Origins | £ 63,035,912 | |
| 15006 | Orino | £ 56,346,103 | |
| 15007 | Orion | £ 47,648,728 | |
| 15008 | Orion. | £ 374,172,630 | |
| 15009 | Orleans | £ 4,119,565 | |
| 15010 | orm | £ 2,684,322,281 | |
| 15011 | orming | £ 79,012,988 | |
| 15012 | Ornamental Knights | £ 3,129,157 | |
| 15013 | Ornate | £ -8,047,867 | |
| 15014 | Orome Aldaron | £ 1,531,184,473 | |
| 15015 | OronzoMafia | £ 5,474,161 | |
| 15016 | Orphans Court | £ 297,981,744 | |
| 15017 | Orpheus | £ 288,236,792 | |
| 15018 | Orphic Co. | £ 4,423,125 | |
| 15019 | Orquinox Co. | £ 1,119 | |
| 15020 | Orricks IT Services | £ 15,082,611 | |
| 15021 | Ortcaj | £ 77,296,813 | |
| 15022 | Orthanc Inc. | £ 147,448,563 | |
| 15023 | Osaka | £ 5,504,057 | |
| 15024 | Osakin | £ 6,161,131 | |
| 15025 | Osbourne | £ 1,744,973 | |
| 15026 | osca-websites | £ 9,181,996 | |
| 15027 | Oscar Meyer | £ 5,773,809 | |
| 15028 | Oscars Emporium | £ 120,548,877 | |
| 15029 | Oscillation | £ 3,001,978 | |
| 15030 | Oscorp Industries | £ 179,374 | |
| 15031 | OSHA Six Flags | £ 5,346,082 | |
| 15032 | Osipolis | £ 16,660,041 | |
| 15033 | Osiris | £ 225,126,101 | |
| 15034 | osiris666 | £ -1,880,407 | |
| 15035 | osiris6971 | £ 50,840,965 | |
| 15036 | Oslo | £ 9,880,014 | |
| 15037 | Osmosis | £ 41,633,292 | |
| 15038 | Osprey Close | £ 53,590,765 | |
| 15039 | ossiary | £ 18,019,777 | |
| 15040 | other comps | £ 286,021,008 | |
| 15041 | Others | £ 26,039,960 | |
| 15042 | Others sometimes | £ 65,359,099 | |
| 15043 | otherwil | £ 133,717 | |
| 15044 | otherwil2 | £ -34,567,223 | |
| 15045 | otherwil3 | £ 1,893,225 | |
| 15046 | otherwil4 | £ 4,826,025 | |
| 15047 | otherwil5 | £ 829,030 | |
| 15048 | Ottawa | £ 44,778,874 | |
| 15049 | Otter | £ 4,365,607 | |
| 15050 | Ottoman Empire | £ 56,887,049 | |
| 15051 | OU812 | £ 295,697,174 | |
| 15052 | Ouija Industries | £ 345,812 | |
| 15053 | our butterfly | £ 1,134,896,288 | |
| 15054 | our differences | £ 201,270,809 | |
| 15055 | Our Discontent | £ 5,507,855 | |
| 15056 | our favorites | £ 56,409,389 | |
| 15057 | Our Golden Years | £ 908,659,300 | |
| 15058 | Our Good Name | £ 571,345,968 | |
| 15059 | Our Happy Memories | £ 34,408,558 | |
| 15060 | our judgement | £ 621,639,331 | |
| 15061 | our lifes | £ 464,291,926 | |
| 15062 | Our Lives | £ 60,309,789 | |
| 15063 | our Lord | £ 5,790,277 | |
| 15064 | our time | £ 13,813,466 | |
| 15065 | Our Times | £ 1,742,749 | |
| 15066 | our universe | £ 611,100,154 | |
| 15067 | Ours | £ 525,294,102 | |
| 15068 | Ourselves | £ 91,484,866 | |
| 15069 | out | £ 85,981,569 | |
| 15070 | out of my face | £ 581,084,624 | |
| 15071 | Out of Nothing | £ 6,356,430 | |
| 15072 | Out Of The Blue | £ 946,989,643 | |
| 15073 | Out You Go | £ 39,675,860 | |
| 15074 | Outdoors | £ 58,636,285 | |
| 15075 | Outer Heaven | £ 58,665,319 | |
| 15076 | Outlandish Labs LLC | £ 1,478,185 | |
| 15077 | Outlaw | £ 10,047,120 | |
| 15078 | Outletsales | £ 1,793,596 | |
| 15079 | Outrageous Fortune | £ 210,155,594 | |
| 15080 | Outsourcing LLC | £ 4,372,708 | |
| 15081 | Outtathisworld plc | £ 1,236,092 | |
| 15082 | Ovation | £ 2,547,061 | |
| 15083 | Over A Pub | £ 102,924,377 | |
| 15084 | over educated idiots | £ 144,938,371 | |
| 15085 | Over grown bush | £ 175,719,320 | |
| 15086 | Over Priced | £ 73,067,141 | |
| 15087 | overHelming | £ 491,414,184 | |
| 15088 | Overmeire | £ 5,506,415 | |
| 15089 | Overpoort | £ 2,764,404 | |
| 15090 | Override | £ 17,139,813 | |
| 15091 | OverThor | £ 5,507,873 | |
| 15092 | Overwatch | £ 215,454,246 | |
| 15093 | Overwatch LTD | £ 57,470,387 | |
| 15094 | Overwhelming | £ 60,498,024 | |
| 15095 | Ovine Flu | £ 61,245,519 | |
| 15096 | ow3n pte ltd | £ 3,307,504 | |
| 15097 | Owens Enterprise | £ 1,346,837,431 | |
| 15098 | Owl | £ 237,452,023 | |
| 15099 | Owls | £ 425,596,680 | |
| 15100 | owned | £ 5,486,100 | |
