The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 12001 | missing a toe | £ 93,592,827 | |
| 12002 | Mission | £ 166,801,144 | |
| 12003 | Mission Survive | £ 114,950,288 | |
| 12004 | Missionary | £ 53,741,069 | |
| 12005 | Mississippi | £ 5,500,599 | |
| 12006 | Mississippi Burning | £ 47,665,328 | |
| 12007 | Mississippi Dreams | £ 269,344,047 | |
| 12008 | Mississippi Inc | £ 5,281,962 | |
| 12009 | MississippiMusic | £ 2,811,899 | |
| 12010 | MISSOURI | £ 1,148,314,366 | |
| 12011 | Missyxx | £ 50,000 | |
| 12012 | Mistake | £ 1,937,719,857 | |
| 12013 | Mistake Not | £ 4,245,817,468 | |
| 12014 | Mistaken Identity | £ 109,775,714 | |
| 12015 | mistaken yidentit | £ 20,847,058 | |
| 12016 | Mistakes | £ 24,462,673 | |
| 12017 | mister | £ 15,343,639 | |
| 12018 | Mister Mister | £ 25,037,060 | |
| 12019 | Mistree | £ 50,000 | |
| 12020 | Mitchell Ltd | £ -2,115,101 | |
| 12021 | Mitchell Ltd2 | £ -1,529,234 | |
| 12022 | Mitchell Ltd3 | £ 5,496,523 | |
| 12023 | Mitchell Ltd4 | £ 4,625,817 | |
| 12024 | Mitigating Circumstances | £ 162,513,039 | |
| 12025 | Mitres | £ 684,354,522 | |
| 12026 | mix | £ 11,825,750 | |
| 12027 | Mixture | £ 34,126,543 | |
| 12028 | Mizuko Holdings | £ 50,000 | |
| 12029 | MJHCo. | £ 81,836,520 | |
| 12030 | MJI | £ 5,141,163 | |
| 12031 | MJII | £ 1,514,759 | |
| 12032 | MJIII | £ 1,341,503 | |
| 12033 | MJIV | £ 334,370 | |
| 12034 | MJLee | £ 12,045,209 | |
| 12035 | MJM 2 | £ 50,000 | |
| 12036 | MJM Games | £ 921,860 | |
| 12037 | Mjolnir | £ 6,493,418,920 | |
| 12038 | MK II | £ -371,982 | |
| 12039 | MK Ultra | £ -17,913,353 | |
| 12040 | MKL | £ 3,948,782,992 | |
| 12041 | mkyumku | £ 1,322,486 | |
| 12042 | mlawenterprise | £ 206,267,702 | |
| 12043 | mlawenterprises | £ 74,433,740 | |
| 12044 | MLM | £ 4,407,868,467 | |
| 12045 | MLM Group | £ 85,259,170 | |
| 12046 | MMI | £ 3,194,811 | |
| 12047 | MMI Holdings | £ 2,450,207 | |
| 12048 | MMI2 | £ 4,617,014 | |
| 12049 | MMI3 | £ 161,241 | |
| 12050 | mmmHHHMmm | £ 1,268,288 | |
| 12051 | MMMM CAKE | £ 11,700,419 | |
| 12052 | MMORPG | £ 386,202,529 | |
| 12053 | MMS | £ 728,736 | |
| 12054 | MN Painting | £ 69,865,838 | |
| 12055 | mnb | £ 5,869,704 | |
| 12056 | MNGA | £ -591,189 | |
| 12057 | Mnv | £ 69,523,625 | |
| 12058 | Mo Alba | £ 497,470,179 | |
| 12059 | MOAB | £ 50,000 | |
| 12060 | moarbkup | £ 5,508,731 | |
| 12061 | moarCarparks | £ 5,546,279 | |
| 12062 | MOASS | £ 464,506 | |
| 12063 | Mob Life Inc | £ 5,489,924 | |
| 12064 | Mob Mentality | £ 3,456,883 | |
| 12065 | Mobbin Service | £ 37,804,870 | |
| 12066 | Mod786 | £ 28,058,765 | |
| 12067 | Mod7866 | £ 5,631,868 | |
| 12068 | Mode | £ 401,332,556 | |
| 12069 | model | £ 126,900,274 | |
| 12070 | Model 1910 | £ 15,519,029 | |
| 12071 | Model in Black | £ 32,036,184 | |
| 12072 | model1 | £ 298,042,055 | |
| 12073 | Moderate Pharmaceuticals | £ 7,403,273 | |
| 12074 | Modern Chemistry | £ 50,000 | |
| 12075 | Modern Day Filth | £ 39,727,103 | |
| 12076 | modern homes and windows | £ 60,782,477 | |
| 12077 | Modern Medicine | £ 657,900,615 | |
| 12078 | Mofo Inc | £ 218,113 | |
| 12079 | mog | £ 62,817,831 | |
| 12080 | MoguMogu | £ 50,000 | |
| 12081 | Mogwai | £ 2,414,035,302 | |
| 12082 | Mohawk | £ 5,884,779 | |
| 12083 | mohicans | £ 87,704,089 | |
| 12084 | MojoMonies | £ -11,896,511 | |
| 12085 | Mojon Inc | £ 2,533,275 | |
| 12086 | Moldy Bread | £ 3,146,415 | |
| 12087 | Mole | £ 2,572,348 | |
| 12088 | molenstraat | £ 2,013,822 | |
| 12089 | Molko | £ 88,524,189 | |
| 12090 | Molly | £ 58,389,036 | |
| 12091 | Molokozavod | £ 8,147,120 | |
| 12092 | Molotov | £ 4,678,705,578 | |
| 12093 | Moltisanti | £ 88,259,217 | |
| 12094 | Moltke Enterprises | £ 58,439,943 | |
| 12095 | mom | £ 317,995,877 | |
| 12096 | MomCorp | £ 1,768,330 | |
| 12097 | Moment | £ 50,000 | |
| 12098 | Moments | £ 63,735,380 | |
| 12099 | MommaJune | £ 5,871,123 | |
| 12100 | Mommy | £ 7,669,413 | |
