The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 4201 | CSIS | £ 1,570,619 | |
| 4202 | CST Photography | £ 50,464,511 | |
| 4203 | CSTPhotography 6 | £ 20,376,078 | |
| 4204 | CSTPhotography 7 | £ 22,129,189 | |
| 4205 | CSTPhotography 8 | £ 21,863,841 | |
| 4206 | CSTPhotography2 | £ 30,989,552 | |
| 4207 | CSTPhotography3 | £ 26,100,838 | |
| 4208 | CSTPhotography4 | £ 36,737,311 | |
| 4209 | CSTPhotography5 | £ 31,737,697 | |
| 4210 | Cthulhu | £ 65,626,904 | |
| 4211 | Cthulhu Corp | £ 5,503,404 | |
| 4212 | Cthulhu Sleeps | £ 1,035,686,271 | |
| 4213 | CTI | £ 4,783,705 | |
| 4214 | CTowers | £ 5,026,966 | |
| 4215 | CTU | £ 3,183,621 | |
| 4216 | Cuba | £ 46,040,107 | |
| 4217 | Cuban Rum | £ 27,147,126 | |
| 4218 | Cube | £ 11,923,402 | |
| 4219 | Cube Inc. | £ 5,507,410 | |
| 4220 | cuberdons | £ 8,923,048 | |
| 4221 | Cubic Works | £ 7,695,062 | |
| 4222 | Cubicstan | £ 3,037,220 | |
| 4223 | Cuckoo Ltd | £ 4,991,067 | |
| 4224 | Cucumber | £ 2,007,928,621 | |
| 4225 | Cue | £ 621,309 | |
| 4226 | Cufin | £ 4,931,482 | |
| 4227 | Cullins | £ 577,371,808 | |
| 4228 | Culliver City | £ 20,192,351 | |
| 4229 | Culo | £ 54,280,976 | |
| 4230 | cult and co | £ 23,957,017 | |
| 4231 | Cultural Expressions | £ 167,279,109 | |
| 4232 | Cumann Luthchleas Gael | £ 5,502,913 | |
| 4233 | Cuneo | £ 57,638,840 | |
| 4234 | Cunnilingus | £ 114,231,725 | |
| 4235 | Cunnys Trading Company | £ 982,076 | |
| 4236 | Cup | £ 19,851,641 | |
| 4237 | Cup0fTea | £ 253,762,330 | |
| 4238 | Cupid Stunts PLC | £ 185,925,643 | |
| 4239 | Cups | £ 65,928,983 | |
| 4240 | Current Charges | £ 272,053,370 | |
| 4241 | Currents | £ 48,241,725 | |
| 4242 | Curry-clanRob | £ 5,507,441 | |
| 4243 | Cursed World | £ 3,320,256 | |
| 4244 | curtains | £ 297,548,191 | |
| 4245 | Curve | £ 1,327,620 | |
| 4246 | Curz Corp | £ 50,000 | |
| 4247 | Cushion | £ 40,606,248 | |
| 4248 | Cushty Son | £ 0 | |
| 4249 | Custard | £ 57,094,161 | |
| 4250 | Custard Pie | £ 668,701,487 | |
| 4251 | Cut | £ 192,062,776 | |
| 4252 | Cute Boys Dx | £ 5,861,264 | |
| 4253 | Cute Red Industries | £ 61,322,810 | |
| 4254 | Cuthberts Coachworks | £ 596,602,678 | |
| 4255 | cutter | £ 37,900,521 | |
| 4256 | Cutting Down Trees | £ 55,370,240 | |
| 4257 | cvc | £ 5,541,924 | |
| 4258 | Cwm | £ 2,355,525 | |
| 4259 | CYAfergie | £ 6,790,092 | |
| 4260 | Cyanide | £ 80,471,115 | |
| 4261 | Cyber Death | £ 125,400,697 | |
| 4262 | Cyber Sharks | £ 82,973,600 | |
| 4263 | Cyber Tech | £ 3,349,487 | |
| 4264 | cybercrimedetionunit | £ 1,429,198 | |
| 4265 | CyberDeath | £ 100,751,231 | |
| 4266 | Cyberdogs | £ 100,831,693 | |
| 4267 | Cyberdyne | £ 169,504,979 | |
| 4268 | Cyberdyne Corp. | £ 4,285,808 | |
| 4269 | cyberdyne inc. | £ 28,564 | |
| 4270 | Cyberdyne Sytems | £ -1,386,763 | |
| 4271 | Cybernet | £ 50,000 | |
| 4272 | Cyberterrorism | £ 653,442,761 | |
| 4273 | Cyborg | £ 102,781,192 | |
| 4274 | Cyborgia Inc | £ 11,103,436 | |
| 4275 | cycle | £ 123,247,905 | |
| 4276 | Cycletour | £ 5,504,207 | |
| 4277 | Cyclone | £ 12,449,375 | |
| 4278 | Cyclonic energy | £ 53,352,325 | |
| 4279 | Cydonia | £ 4,972,116 | |
| 4280 | CYKA | £ 56,980,649 | |
| 4281 | CykaBlyat | £ 5,365,780 | |
| 4282 | Cylon | £ 79,057,234 | |
| 4283 | Cylons | £ 52,605,207 | |
| 4284 | Cymraeg | £ 10,964,960 | |
| 4285 | Cyprus | £ 269,597,650 | |
| 4286 | Cyrus Salad | £ 59,170,526 | |
| 4287 | Cytosport | £ -5,801,399 | |
| 4288 | czar | £ 4,304,081 | |
| 4289 | D Block | £ 1,449,974,172 | |
| 4290 | D Block Enterprise | £ 2,858,788 | |
| 4291 | D Corp | £ 1,873,647 | |
| 4292 | D E A T H | £ 147,714,513 | |
| 4293 | D-Bombs | £ 59,459,123 | |
| 4294 | D-Lo Enterprise | £ 1,291,954 | |
| 4295 | D.E.A | £ 1,156,785 | |
| 4296 | D.N.A | £ 208,502,808 | |
| 4297 | D3ATH | £ 120,207,714 | |
| 4298 | D3STRUCTI0N | £ 752,172,838 | |
| 4299 | D741 | £ 51,019,137 | |
| 4300 | Da Ba Dee Da Ba di | £ 59,343,406 | |
