The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 13801 | Mass Effect | £ 38,467,726 | |
| 13802 | Mass Extinctions | £ 89,371,514 | |
| 13803 | MaSs HiLiGhTeR | £ 55,491,788 | |
| 13804 | Mass Satisfaction | £ 108,172,069 | |
| 13805 | Massachusetts | £ 113,865,613 | |
| 13806 | Massacre | £ 7,955,799 | |
| 13807 | Massage Rev Win | £ 1,080,472,344 | |
| 13808 | Massenet | £ 652,023,276 | |
| 13809 | Massive | £ 83,683,640 | |
| 13810 | Massive Attack | £ 40,160,601 | |
| 13811 | Massive Debt | £ 209,734,802 | |
| 13812 | Massive Dong Enterprise | £ 5,754,083 | |
| 13813 | MASSIVE ELECTIONS | £ 16,692,085 | |
| 13814 | Massive Inc | £ 6,334,823 | |
| 13815 | Masta Ace Inc | £ 84,177,720 | |
| 13816 | Mastah Holdings | £ 5,504,546 | |
| 13817 | Master bates | £ 4,767 | |
| 13818 | Master Builders | £ 6,821,399 | |
| 13819 | master molloy2 | £ 3,015,413 | |
| 13820 | Master of Zelda | £ -757,416 | |
| 13821 | Master Splinter | £ 462,884,484 | |
| 13822 | Master Sticker Peelers | £ 3,448,513 | |
| 13823 | Master Swords and Bows | £ 170,324,442 | |
| 13824 | Masterbuilt | £ 552,143,649 | |
| 13825 | mastermolloy1 | £ 4,589,292 | |
| 13826 | mastermolloy4 | £ 878,532 | |
| 13827 | Masters | £ 1,276,472,914 | |
| 13828 | mastertkd | £ 156,322,341 | |
| 13829 | Masterton | £ 9,742,506 | |
| 13830 | Mata.inc | £ 13,598,445 | |
| 13831 | Matador Cattle Company | £ 5,024,777 | |
| 13832 | matches | £ 795,209,718 | |
| 13833 | Matches plus Petrol | £ 250,708,917 | |
| 13834 | Matchlock | £ 324,682 | |
| 13835 | Matchstick Men | £ 49,555,217 | |
| 13836 | Materia | £ 19,046,923 | |
| 13837 | Materials | £ 5,293,904 | |
| 13838 | Mathewmatics | £ 6,466,483 | |
| 13839 | Matrix Industries | £ 30,899,641 | |
| 13840 | Matrix Reimbursed | £ 134,369,263 | |
| 13841 | Mats | £ 6,079,772,915 | |
| 13842 | Matt Coprporations | £ 25,939,511 | |
| 13843 | Matt Corp 2 | £ 5,507,664 | |
| 13844 | Matt Schaub | £ 210,415,111 | |
| 13845 | Matter | £ 811,765,265 | |
| 13846 | matthew martin | £ 11,196,263 | |
| 13847 | Matthews Kiosks | £ 877,790 | |
| 13848 | Mattikins | £ 50,000 | |
| 13849 | MattMurdoch | £ 66,808,737 | |
| 13850 | Matts money | £ 1,189,880 | |
| 13851 | Matts Place | £ 4,023,510 | |
| 13852 | Mattski Inc | £ 101,392 | |
| 13853 | Matty B Inc 7 | £ -331,481 | |
| 13854 | matty mears corporation | £ 7,886,001 | |
| 13855 | matty mears plc | £ 76,777,292 | |
| 13856 | MattyBinc | £ 69,763,618 | |
| 13857 | MattyBinc2 | £ 96,555,685 | |
| 13858 | MattyBinc3 | £ 38,675,838 | |
| 13859 | MattyBinc8 | £ 62,049,472 | |
| 13860 | Mau5trap | £ 939,845 | |
| 13861 | Maui Waui | £ -690,143 | |
| 13862 | Mauro | £ 5,504,457 | |
| 13863 | mauro mania | £ 50,000 | |
| 13864 | maurotech | £ 548,809 | |
| 13865 | Mauve en Wit | £ 29,086,507 | |
| 13866 | Maverick Inc | £ 14,453,208 | |
| 13867 | Maverick Trouble Inc | £ 37,638,244 | |
| 13868 | Mavs | £ -158,119 | |
| 13869 | Maw | £ 5,504,812 | |
| 13870 | MaWahhh | £ 90,231,150 | |
| 13871 | MawkiMawki | £ 6,983,736 | |
| 13872 | maws house of life | £ 39,699,207 | |
| 13873 | maws house of life 3 | £ 14,416,934 | |
| 13874 | maws house of life2 | £ 9,040,544 | |
| 13875 | Max | £ 45,626,741 | |
| 13876 | Max Cash Grab Stuff Inc | £ 4,492,788 | |
| 13877 | Max Pain | £ 135,911,956 | |
| 13878 | MaxAttack Ltd | £ 773,584 | |
| 13879 | Maxima | £ 9,994,577 | |
| 13880 | Maximas | £ 50,000 | |
| 13881 | Maximize your Lips | £ 3,373,774 | |
| 13882 | Maximum | £ -2,213,330 | |
| 13883 | Maximum Appeal Lettings | £ 153,340,164 | |
| 13884 | Maximum Force | £ 756,904,724 | |
| 13885 | Maximum Profit | £ 5,583,604 | |
| 13886 | MaximumRetaliation | £ 345,639 | |
| 13887 | Maximus Inc | £ -27,673 | |
| 13888 | maximus industries | £ 52,863,673 | |
| 13889 | Maximus Pyrotechnics | £ -22,809,232 | |
| 13890 | Maximus Storage | £ 4,310,218 | |
| 13891 | Maximuscle | £ 3,759,106 | |
| 13892 | Maxo-Million | £ 255,158 | |
| 13893 | Maxxis | £ 2,547,439 | |
| 13894 | May | £ 321,223,063 | |
| 13895 | may help | £ 23,308,617 | |
| 13896 | Maya | £ 857,798,735 | |
| 13897 | Mayans | £ 28,668,150 | |
| 13898 | Mayans MC | £ 546,725,874 | |
| 13899 | Maybach Music | £ 12,470,379 | |
| 13900 | Maybe next day | £ 3,220,045 | |
