The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 16301 | Orricks IT Services | £ 15,082,611 | |
| 16302 | Ortcaj | £ 77,296,813 | |
| 16303 | Orthanc Inc. | £ 147,448,563 | |
| 16304 | Osaka | £ 5,504,057 | |
| 16305 | Osakin | £ 6,161,131 | |
| 16306 | Osbourne | £ 1,744,973 | |
| 16307 | osca-websites | £ 9,181,996 | |
| 16308 | Oscar Meyer | £ 5,773,809 | |
| 16309 | Oscars Emporium | £ 148,690,217 | |
| 16310 | Oscillation | £ 3,001,978 | |
| 16311 | Oscorp Industries | £ 179,374 | |
| 16312 | OSHA Six Flags | £ 5,346,082 | |
| 16313 | Osipolis | £ 16,660,041 | |
| 16314 | Osiris | £ 225,126,101 | |
| 16315 | osiris666 | £ -1,880,407 | |
| 16316 | osiris6971 | £ 50,840,965 | |
| 16317 | Oslo | £ 9,880,014 | |
| 16318 | Osmosis | £ 41,633,292 | |
| 16319 | Osprey Close | £ 53,590,765 | |
| 16320 | ossiary | £ 18,019,777 | |
| 16321 | Othello | £ 79,265,292 | |
| 16322 | other comps | £ 286,021,008 | |
| 16323 | Other People | £ 34,385,778 | |
| 16324 | Others | £ 26,039,960 | |
| 16325 | Others sometimes | £ 65,359,099 | |
| 16326 | otherwil | £ 133,717 | |
| 16327 | otherwil2 | £ -34,567,223 | |
| 16328 | otherwil3 | £ 1,893,225 | |
| 16329 | otherwil4 | £ 4,826,025 | |
| 16330 | otherwil5 | £ 829,030 | |
| 16331 | Ottawa | £ 44,778,874 | |
| 16332 | Otter | £ 43,181,655 | |
| 16333 | Ottoman Empire | £ 56,887,049 | |
| 16334 | OU812 | £ 295,697,174 | |
| 16335 | Ouija Industries | £ 345,812 | |
| 16336 | our butterfly | £ 1,134,896,288 | |
| 16337 | our differences | £ 298,522,544 | |
| 16338 | Our Discontent | £ 5,507,855 | |
| 16339 | Our Fathers | £ 116,143,694 | |
| 16340 | Our Golden Years | £ 908,659,300 | |
| 16341 | Our Good Name | £ 571,345,968 | |
| 16342 | Our Happy Memories | £ 34,408,558 | |
| 16343 | our judgement | £ 621,639,331 | |
| 16344 | our lifes | £ 464,291,926 | |
| 16345 | Our Lives | £ 60,309,789 | |
| 16346 | our Lord | £ 5,790,277 | |
| 16347 | Our Times | £ 1,742,749 | |
| 16348 | our universe | £ 611,100,154 | |
| 16349 | Ours | £ 716,236,623 | |
| 16350 | Ourselves | £ 91,484,866 | |
| 16351 | out | £ 85,981,569 | |
| 16352 | out of my face | £ 581,084,624 | |
| 16353 | Out of Nothing | £ 6,356,430 | |
| 16354 | Out Of The Blue | £ 946,989,643 | |
| 16355 | Out You Go | £ 39,675,860 | |
| 16356 | Outer Heaven | £ 58,665,319 | |
| 16357 | Outlandish Labs LLC | £ 1,478,185 | |
| 16358 | Outlaw | £ 10,047,120 | |
| 16359 | Outletsales | £ 1,793,596 | |
| 16360 | outlook responding | £ 432,043,215 | |
| 16361 | Outrageous Fortune | £ 210,155,594 | |
| 16362 | Outside Space | £ 6,959,307 | |
| 16363 | Outside the square | £ 180,827,064 | |
| 16364 | Outsourcing LLC | £ 4,372,708 | |
| 16365 | Outtathisworld plc | £ 1,236,092 | |
| 16366 | Ovation | £ 2,547,061 | |
| 16367 | over educated idiots | £ 144,322,220 | |
| 16368 | Over grown bush | £ 175,719,320 | |
| 16369 | Over Priced | £ 73,067,141 | |
| 16370 | Overclocked RAM | £ 2,553,189 | |
| 16371 | Overdrive | £ 60,023,124 | |
| 16372 | overHelming | £ 491,414,184 | |
| 16373 | Overmeire | £ 5,506,415 | |
| 16374 | Overpoort | £ 2,764,404 | |
| 16375 | Override | £ 17,139,813 | |
| 16376 | overthinking | £ 10,529,502 | |
| 16377 | OverThor | £ 5,507,873 | |
| 16378 | Overwatch | £ 215,454,246 | |
| 16379 | Overwatch LTD | £ 57,470,387 | |
| 16380 | Overwhelming | £ 60,498,024 | |
| 16381 | Ovine Flu | £ 61,245,519 | |
| 16382 | ow3n pte ltd | £ 3,307,504 | |
| 16383 | Owens Enterprise | £ 1,346,837,431 | |
| 16384 | Owl | £ 237,452,023 | |
| 16385 | Owl Faux | £ 383,668 | |
| 16386 | Owls | £ 425,596,680 | |
| 16387 | owned | £ 5,486,100 | |
| 16388 | Owned2EU | £ -76,039,189 | |
| 16389 | Owned3EU | £ 2,813,019 | |
| 16390 | Owned4EU | £ -11,748,456 | |
| 16391 | Owner | £ 6,354,110 | |
| 16392 | Ownership | £ 116,288,445 | |
| 16393 | oWoTYRANNYoWo | £ 196,834,461 | |
| 16394 | OWWWW | £ 5,508,284 | |
| 16395 | Oxcide | £ 12,818,579 | |
| 16396 | Oxford | £ 205,487,202 | |
| 16397 | OXO | £ 627,787,564 | |
| 16398 | Oxtail Soup | £ 64,738,096 | |
| 16399 | Oxy Clean | £ 71,691,928 | |
| 16400 | OXYCODONE | £ 2,227,745,588 | |
