The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 15001 | old to netro | £ 40,859,694 | |
| 15002 | Old tyres | £ 54,000,053 | |
| 15003 | Old Whiskey | £ 78,899,948 | |
| 15004 | Old Wisteria | £ 35,687,268 | |
| 15005 | Old World Industry | £ 1,734,908 | |
| 15006 | Old World Ventures | £ 50,000 | |
| 15007 | OlDirty | £ 47,991,916 | |
| 15008 | oldschool | £ 121,302,173 | |
| 15009 | Oligarchy | £ 556,860,397 | |
| 15010 | Oligarchy inc. | £ 7,116,723 | |
| 15011 | olis | £ 91,036,818 | |
| 15012 | Oliver Cromwell | £ 220,112,740 | |
| 15013 | Oliver Queen | £ 56,107,912 | |
| 15014 | Olivers Imagination | £ 124,320,555 | |
| 15015 | Ollio Inc. | £ 6,159,098 | |
| 15016 | Ollio2 Inc. | £ -2,232,039 | |
| 15017 | Ollio3 Inc. | £ -680,853 | |
| 15018 | Olrik | £ 22,147,425 | |
| 15019 | Olympia | £ 112,782,553 | |
| 15020 | olympic rings | £ 3,084,696,830 | |
| 15021 | Olympics | £ 5,508,747 | |
| 15022 | Olympus | £ 2,084,999,378 | |
| 15023 | OMD | £ 58,906,121 | |
| 15024 | Omega | £ 6,183,955 | |
| 15025 | Omega Indusries | £ 37,799 | |
| 15026 | OmegaFox Inc. | £ 1,266,634 | |
| 15027 | Omelette | £ 10,061,528 | |
| 15028 | Omens | £ 27,573,571 | |
| 15029 | Omerta | £ 1,007,186,123 | |
| 15030 | Omerta Inc. | £ 5,500,096 | |
| 15031 | Omni | £ 26,585,058 | |
| 15032 | Omni Future Corp 1 | £ 855,512,970 | |
| 15033 | omni4 | £ 1,185,151 | |
| 15034 | Omnia | £ 29,796,207 | |
| 15035 | Omnifarious | £ 2,354,130,200 | |
| 15036 | Omnificent | £ 2,314,344,921 | |
| 15037 | Omnipotent | £ 2,212,220,979 | |
| 15038 | Omnipresent | £ 2,267,974,609 | |
| 15039 | Omniscient | £ 2,482,501,107 | |
| 15040 | Omnitool | £ 4,640,506 | |
| 15041 | on a stick | £ 13,410 | |
| 15042 | On all you Candyass | £ 69,045,286 | |
| 15043 | On Industries | £ 1,896,074 | |
| 15044 | On It | £ 59,533,659 | |
| 15045 | On My Mind | £ 87,748,385 | |
| 15046 | On Patrol | £ 5,505,639 | |
| 15047 | On The Fritz | £ 79,242,996 | |
| 15048 | On the move | £ 111,234,097 | |
| 15049 | on the road | £ 405,722,546 | |
| 15050 | once | £ -263,290 | |
| 15051 | Once Said | £ 4,848,853 | |
| 15052 | Once Upon a Time | £ 24,760,937 | |
| 15053 | Once Were Warriors | £ 54,754,263 | |
| 15054 | one | £ 341,379,992 | |
| 15055 | One and a Half | £ 8,610,014,000 | |
| 15056 | One Company | £ 398,709,264 | |
| 15057 | one dollar company | £ 40,885,349 | |
| 15058 | One Enterprise | £ 5,940,523 | |
| 15059 | One Eye Morty | £ 6,039,050 | |
| 15060 | One Eyed Three Leg Dog | £ 63,605,247 | |
| 15061 | One gun | £ 1,309,890,304 | |
| 15062 | One Hit Wonder | £ 30,087,678 | |
| 15063 | One Hundred Netro Bucks | £ 132,828,467 | |
| 15064 | One Insane Rastaman | £ 273,250,880 | |
| 15065 | one love | £ 3,838,898 | |
| 15066 | One Man | £ 3,996,240 | |
| 15067 | one man crying | £ 1,050,939,923 | |
| 15068 | One Mind | £ -5,139,455 | |
| 15069 | one of craze | £ 398,067,001 | |
| 15070 | One Piece | £ 11,282,781 | |
| 15071 | One Pound Fish | £ 1,584,921 | |
| 15072 | One Shot | £ 123,851,456 | |
| 15073 | One Silence | £ -4,074 | |
| 15074 | One to Many. | £ 4,976,234 | |
| 15075 | one too many pints | £ 5,500,713 | |
| 15076 | One United | £ 5,379,005 | |
| 15077 | one1 | £ 1,930,995 | |
| 15078 | oneone | £ 18,206,569 | |
| 15079 | Oner | £ 10,516,756 | |
| 15080 | OneStopEnvelopeShoppe | £ -38,952 | |
| 15081 | Onion of Arabia | £ 11,458,256 | |
| 15082 | Onioninc | £ -43,613 | |
| 15083 | Onions | £ 56,031,337 | |
| 15084 | onions inc | £ 46,832,459 | |
| 15085 | ONLINE GAMES | £ 120,242,830 | |
| 15086 | Only 50k | £ 4,427,311 | |
| 15087 | Only Bombs Allowed | £ 57,741,277 | |
| 15088 | Only Fans | £ 810,106,595 | |
| 15089 | Only Fools and Horses | £ 859,719,219 | |
| 15090 | only me | £ 50,000 | |
| 15091 | only me inc | £ 133,078,068 | |
| 15092 | OnlyFans | £ 21,047,545 | |
| 15093 | Onomatopoeias | £ 939,660 | |
| 15094 | Onshore Money | £ 104,918,400 | |
| 15095 | Ontara | £ 79,736,570 | |
| 15096 | Ontario | £ 159,783,223 | |
| 15097 | ontheblock | £ 6,402,837 | |
| 15098 | Onyx | £ 429,592 | |
| 15099 | OO7 | £ 6,532,200 | |
| 15100 | Ooglaigh na Heireann | £ 240,713,877 | |
