The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 5301 | cityoffspring | £ 22,903,783 | |
| 5302 | CitySuper | £ 141,731,850 | |
| 5303 | CiviIization | £ 813,053,096 | |
| 5304 | Civilisation | £ 253,003,716 | |
| 5305 | Civilization | £ 9,053,657 | |
| 5306 | CKLOWSMALL | £ 6,269,586 | |
| 5307 | CKLOWSMALL1 | £ 4,211,613 | |
| 5308 | CKLOWSMALL2 | £ 7,574,241 | |
| 5309 | CKLOWSMALL3 | £ 4,096,706 | |
| 5310 | claim.co | £ 153,066,098 | |
| 5311 | Claimh Solais | £ 13,026,508 | |
| 5312 | Clairvoyance | £ 222,707,023 | |
| 5313 | clam burger | £ -2,190,512 | |
| 5314 | clammys | £ 31,010 | |
| 5315 | Clan Fraser | £ 1,262,923,459 | |
| 5316 | Clan McLeod | £ 279,729,571 | |
| 5317 | Clandestine Realty | £ 47,386,575 | |
| 5318 | Clans | £ 322,847,271 | |
| 5319 | Clans of Scotland | £ 491,180,760 | |
| 5320 | clap | £ 37,531,216 | |
| 5321 | Clarences Millions | £ 135,441,193 | |
| 5322 | ClaretAndGold | £ 5,503,516 | |
| 5323 | Clarion Ledger | £ 2,067,493 | |
| 5324 | Clarity | £ 2,668,290,320 | |
| 5325 | Clarity Web Solutions | £ 1,480,867 | |
| 5326 | Clark | £ 323,378,245 | |
| 5327 | Clarksons Farm | £ 48,292,179 | |
| 5328 | clarkyCorp | £ 4,826,048 | |
| 5329 | Class | £ 552,439,471 | |
| 5330 | Class A Drugs | £ 6,237,284 | |
| 5331 | Class A Swedge | £ 109,262,865 | |
| 5332 | Class B Associates | £ 77,503,522 | |
| 5333 | Class C LTD | £ 91,308,438 | |
| 5334 | Classified | £ 1,245,928,991 | |
| 5335 | Claustrophobia | £ 202,399,403 | |
| 5336 | Claverhouse | £ 482,534,969 | |
| 5337 | Claw Hammer | £ 171,833,671 | |
| 5338 | Clayton Nuclear Systems | £ 10,738,836 | |
| 5339 | Clean-Up Crew | £ 48,238,560 | |
| 5340 | Cleaners | £ 422,385,048 | |
| 5341 | cleanupcrew | £ 5,500,009 | |
| 5342 | CLEAR | £ 19,007,952 | |
| 5343 | Clear Creek | £ 212,731,716 | |
| 5344 | clearing wave | £ 4,941,203 | |
| 5345 | ClearSky | £ 40,185,924 | |
| 5346 | ClearWater | £ 50,000 | |
| 5347 | Cleasby co | £ 60,798,869 | |
| 5348 | Cleaving Offshore Ltd | £ 5,506,766 | |
| 5349 | Clem Fandango | £ 4,004,572,172 | |
| 5350 | Clementine | £ 119,480,884 | |
| 5351 | Clemenza | £ 300,858 | |
| 5352 | Cleveland | £ 274,388,319 | |
| 5353 | Cleveland Browns | £ 77,283,548 | |
| 5354 | Clever Names | £ 2,111,897,478 | |
| 5355 | Cleyra | £ 58,482,880 | |
| 5356 | Click | £ 5,502,877 | |
| 5357 | ClickClick | £ 3,938,259 | |
| 5358 | Cliffjumper | £ 189,583,070 | |
| 5359 | Climate | £ 184,200,853 | |
| 5360 | Climate Change | £ 322,888,160 | |
| 5361 | climber | £ 127,185,821 | |
| 5362 | CLIPPERMAN | £ 57,055,407 | |
| 5363 | Clitheroe | £ 415,850,956 | |
| 5364 | Clobber | £ 131,272,819 | |
| 5365 | clobber2 | £ 2,206,865 | |
| 5366 | Clock | £ 5,500,868 | |
| 5367 | Clocks | £ 50,000 | |
| 5368 | Clockwork Nexus | £ 5,751,012 | |
| 5369 | Cloggs | £ 2,840,593,717 | |
| 5370 | Clone Wars Co. | £ 4,237,523 | |
| 5371 | Clones | £ 112,130,494 | |
| 5372 | Clonrichert | £ 198,873 | |
| 5373 | Closeness | £ 483,867,814 | |
| 5374 | Clothing | £ 3,930,256 | |
| 5375 | Cloud Bazaar | £ 50,000 | |
| 5376 | Clouds | £ 74,213,426 | |
| 5377 | cloudyyy | £ 3,872,271 | |
| 5378 | Clout | £ 1,805,408 | |
| 5379 | Clove Club | £ 296,641,292 | |
| 5380 | Cloven Hooves | £ 103,118,487 | |
| 5381 | Clowd Inc. | £ 52,949,730 | |
| 5382 | Clown School | £ 5,327,420 | |
| 5383 | Clown Town | £ -2,009,498 | |
| 5384 | Clowns | £ 45,149,976 | |
| 5385 | ClownsRfun | £ 21,446,367 | |
| 5386 | club | £ 515,017,210 | |
| 5387 | Club inc | £ 388,803 | |
| 5388 | Club Tropicana | £ 160,335,640 | |
| 5389 | Cluedo | £ 4,906,330,896 | |
| 5390 | Clunge Enterprises | £ 1,967,611 | |
| 5391 | ClusterFartIndustries | £ 57,324,456 | |
| 5392 | ClusterShartIndustries | £ 54,287,012 | |
| 5393 | ClusterSmookIndustries | £ 57,924,163 | |
| 5394 | ClusterSmuckIndustries | £ 130,305,436 | |
| 5395 | ClusterSmutIndustries | £ 50,288,579 | |
| 5396 | Clyde | £ 512,722,174 | |
| 5397 | CMA | £ 32,179 | |
| 5398 | CMI | £ 66,993 | |
| 5399 | CMStu | £ 187,775 | |
| 5400 | Co-Op | £ 228,747,203 | |
