The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 5301 | ClaretAndGold | £ 5,503,516 | |
| 5302 | Clarion Ledger | £ 2,067,493 | |
| 5303 | Clarity | £ 2,668,290,320 | |
| 5304 | Clarity Web Solutions | £ 1,480,867 | |
| 5305 | Clark | £ 323,378,245 | |
| 5306 | Clarksons Farm | £ 47,523,190 | |
| 5307 | clarkyCorp | £ 4,826,048 | |
| 5308 | Class | £ 552,439,471 | |
| 5309 | Class A Drugs | £ 6,237,284 | |
| 5310 | Class A Swedge | £ 109,262,865 | |
| 5311 | Class B Associates | £ 77,503,522 | |
| 5312 | Class C LTD | £ 91,308,438 | |
| 5313 | Classified | £ 1,245,928,991 | |
| 5314 | Claustrophobia | £ 202,399,403 | |
| 5315 | Claverhouse | £ 482,534,969 | |
| 5316 | Claw Hammer | £ 171,833,671 | |
| 5317 | Clayton Nuclear Systems | £ 10,738,836 | |
| 5318 | Clean-Up Crew | £ 48,238,560 | |
| 5319 | Cleaners | £ 422,385,048 | |
| 5320 | cleanupcrew | £ 5,500,009 | |
| 5321 | CLEAR | £ 19,007,952 | |
| 5322 | Clear Creek | £ 212,731,716 | |
| 5323 | clearing wave | £ 4,941,203 | |
| 5324 | ClearSky | £ 39,106,883 | |
| 5325 | ClearWater | £ 50,000 | |
| 5326 | Cleasby co | £ 60,798,869 | |
| 5327 | Cleaving Offshore Ltd | £ 5,506,766 | |
| 5328 | Clem Fandango | £ 4,004,989,749 | |
| 5329 | Clementine | £ 119,480,884 | |
| 5330 | Clemenza | £ 300,858 | |
| 5331 | Cleveland | £ 274,388,319 | |
| 5332 | Cleveland Browns | £ 77,283,548 | |
| 5333 | Clever Names | £ 2,111,897,478 | |
| 5334 | Cleyra | £ 58,482,880 | |
| 5335 | Click | £ 5,502,877 | |
| 5336 | ClickClick | £ 3,938,259 | |
| 5337 | Cliffjumper | £ 189,583,070 | |
| 5338 | Climate | £ 184,200,853 | |
| 5339 | Climate Change | £ 322,888,160 | |
| 5340 | climber | £ 127,185,821 | |
| 5341 | CLIPPERMAN | £ 57,055,407 | |
| 5342 | Clitheroe | £ 415,850,956 | |
| 5343 | Clobber | £ 131,272,819 | |
| 5344 | clobber2 | £ 2,206,865 | |
| 5345 | Clock | £ 5,500,868 | |
| 5346 | Clocks | £ 50,000 | |
| 5347 | Clockwork Nexus | £ 5,751,012 | |
| 5348 | Cloggs | £ 2,840,593,717 | |
| 5349 | Clone Wars Co. | £ 4,237,523 | |
| 5350 | Clones | £ 112,130,494 | |
| 5351 | Clonrichert | £ 198,873 | |
| 5352 | Closeness | £ 483,867,814 | |
| 5353 | Clothing | £ 3,930,256 | |
| 5354 | Cloud Bazaar | £ 50,000 | |
| 5355 | Clouds | £ 74,213,426 | |
| 5356 | cloudyyy | £ 3,872,271 | |
| 5357 | Clove Club | £ 296,641,292 | |
| 5358 | Cloven Hooves | £ 103,118,487 | |
| 5359 | Clowd Inc. | £ 52,949,730 | |
| 5360 | Clown School | £ 5,327,420 | |
| 5361 | Clown Town | £ -2,009,498 | |
| 5362 | Clowns | £ 45,149,976 | |
| 5363 | ClownsRfun | £ 21,446,367 | |
| 5364 | club | £ 515,017,210 | |
| 5365 | Club inc | £ 388,803 | |
| 5366 | Club Tropicana | £ 140,036,380 | |
| 5367 | Clubs | £ 401,050,674 | |
| 5368 | Cluedo | £ 4,906,330,896 | |
| 5369 | Clunge Enterprises | £ 1,967,611 | |
| 5370 | ClusterFartIndustries | £ 57,324,456 | |
| 5371 | ClusterShartIndustries | £ 54,287,012 | |
| 5372 | ClusterSmookIndustries | £ 57,924,163 | |
| 5373 | ClusterSmuckIndustries | £ 130,305,436 | |
| 5374 | ClusterSmutIndustries | £ 50,288,579 | |
| 5375 | Clyde | £ 501,242,470 | |
| 5376 | CMA | £ 32,179 | |
| 5377 | CMI | £ 66,993 | |
| 5378 | CMStu | £ 187,775 | |
| 5379 | Co-Op | £ 228,747,203 | |
| 5380 | Co-Operative | £ 1,439,413 | |
| 5381 | Co1 | £ 50,000 | |
| 5382 | CO2 | £ 3,507,780,268 | |
| 5383 | CO2 Fire Extinguisher | £ 112,872,017 | |
| 5384 | CO3 | £ 4,340,673,739 | |
| 5385 | Coach | £ 12,164,353 | |
| 5386 | Coach Purses | £ 69,514,582 | |
| 5387 | Coast toCoast | £ 227,236,801 | |
| 5388 | Coat Hanger | £ 21,523,460 | |
| 5389 | Coating | £ 470,957,791 | |
| 5390 | cob | £ 222,968,805 | |
| 5391 | Cobblers | £ 141,118,977 | |
| 5392 | Cobblewall | £ -821,738 | |
| 5393 | Cobra Dojo | £ 13,639,129 | |
| 5394 | Cobra.inc | £ 5,491,225 | |
| 5395 | Coca Cola | £ 65,429,607 | |
| 5396 | Coca-Cola Company | £ 7,712,659 | |
| 5397 | CocaCola | £ 51,870,968 | |
| 5398 | Cocaine | £ 298,622,868 | |
| 5399 | CocaineCowboys | £ 2,581,891 | |
| 5400 | Cockermouth | £ 2,450,000 | |
