The following list shows all the companies that are in the game.
| Companies List | |||
| Pos. | Company Name | Awards | Total Worth |
| 16501 | Side Pony | £ 191,337,989 | |
| 16502 | SideLineD | £ 3,552,075 | |
| 16503 | Sidewinder | £ 207,797,344 | |
| 16504 | Sidney inc | £ 50,000 | |
| 16505 | Sids Emporium | £ 15,032,548 | |
| 16506 | Sieber | £ 50,000 | |
| 16507 | Sifosed Enterprises | £ 25,255 | |
| 16508 | Sift co | £ -137,410 | |
| 16509 | Sighs | £ 9,874,626 | |
| 16510 | Sight | £ 200,734,160 | |
| 16511 | Sigma Industries | £ 17,556 | |
| 16512 | Sigma-957 | £ 56,676,770 | |
| 16513 | Sigma-Aldrich | £ 129,527,762 | |
| 16514 | Sign | £ 51,894,494 | |
| 16515 | Signals | £ 45,461,167 | |
| 16516 | Silat | £ 126,598,241 | |
| 16517 | Silence | £ 80,546,554 | |
| 16518 | silent assassin | £ 1,250,769 | |
| 16519 | Silent Inc. | £ 286,365,315 | |
| 16520 | Silent Stalker | £ 1,059,795 | |
| 16521 | Silent Witness | £ 289,995,177 | |
| 16522 | Silent_Whisper | £ 189,456,569 | |
| 16523 | Silica Gel | £ 416,330,491 | |
| 16524 | Silicon Valley | £ 160,288,417 | |
| 16525 | Silk Boxers | £ 79,929,679 | |
| 16526 | Silly Walks | £ 8,973,455 | |
| 16527 | SillyPutty | £ 39,214,929 | |
| 16528 | Siloporten | £ 6,969,503 | |
| 16529 | silva | £ 36,054,742 | |
| 16530 | Silver | £ 1,180,244,063 | |
| 16531 | Silver Aftershock | £ 56,640,118 | |
| 16532 | Silver Haze | £ 286,306,148 | |
| 16533 | Silver Inc | £ 10,197,661 | |
| 16534 | Silver Plated Netrobucks | £ 168,199,969 | |
| 16535 | Silver Shamrock Inc | £ 2,317,866 | |
| 16536 | Silver Surfer | £ 592,109,630 | |
| 16537 | Silver Wings | £ 1,381,690,294 | |
| 16538 | Silverdale St | £ 30,471,547 | |
| 16539 | Silvermoon Enterprises | £ -214,855 | |
| 16540 | Silvertide Enterprises | £ -1,627,976 | |
| 16541 | silvra | £ 54,285,205 | |
| 16542 | Sim City3 | £ 2,672,113 | |
| 16543 | Simon Cowells posterior | £ 240,514,908 | |
| 16544 | Simon Fraser University | £ 119,553,446 | |
| 16545 | Simon The Sprout | £ 168,440,909 | |
| 16546 | Simple | £ 199,139,466 | |
| 16547 | Simple Inc. | £ 161,992,874 | |
| 16548 | Simple Things | £ 55,697,089 | |
| 16549 | simple things in life | £ -150,921 | |
| 16550 | SimpleS | £ 45,372,564 | |
| 16551 | Simpleton Co. | £ 154,696,172 | |
| 16552 | Simplicity | £ 73,991,816 | |
| 16553 | simply does it | £ 16,297,060 | |
| 16554 | simply nuts | £ 3,357,807 | |
| 16555 | Simply Sane Products | £ 46,396,437 | |
| 16556 | simplysouthern | £ 404,043 | |
| 16557 | Simulation | £ 4,647,866 | |
| 16558 | Sin | £ 882,690,513 | |
| 16559 | Sin City | £ 92,965,888 | |
| 16560 | Sin Co | £ 617 | |
| 16561 | Sin Sentido | £ 253,153,436 | |
| 16562 | Sinaloa | £ 233,824,227 | |
| 16563 | Sinatra Select | £ 636,672,700 | |
| 16564 | Sinbad the sailor | £ 214,550,415 | |
| 16565 | Since Day 1 | £ 61,665,725 | |
| 16566 | Since Day Five | £ 1,216,915,969 | |
| 16567 | Since Day four | £ 1,253,583,560 | |
| 16568 | Since Day One | £ 659,911,378 | |
| 16569 | Since Day Three | £ 310,828,290 | |
| 16570 | Since Day two | £ 387,020,148 | |
| 16571 | sincity | £ 207,710,495 | |
| 16572 | Sinclair Girnigoe | £ 1,133,668,388 | |
| 16573 | Sindar | £ 5,505,299 | |
| 16574 | Singani | £ 10,311,068,262 | |
| 16575 | Singapore | £ 453,579,334 | |
| 16576 | Singapore Garden | £ 610,307,111 | |
| 16577 | singham inc | £ 10,963,284 | |
| 16578 | SinghLTD2 | £ 10,446,400 | |
| 16579 | Single Barrel | £ 988,439,929 | |
| 16580 | Single Malt | £ 16,426,947 | |
| 16581 | Single Moms | £ 424,452,263 | |
| 16582 | Sinic Leccy Co | £ 477,855,468 | |
| 16583 | Sinister | £ 1,271,414 | |
| 16584 | Sinister Minister | £ 343,419,669 | |
| 16585 | Sink | £ 2,232,154 | |
| 16586 | Sink Ships | £ 269,509,457 | |
| 16587 | Sinkain INC | £ 1,929,856 | |
| 16588 | Sinking Ships | £ 81,355,767 | |
| 16589 | Sinners | £ 264,360,134 | |
| 16590 | sins | £ 1,105,930,002 | |
| 16591 | sinsinattee | £ 77,807 | |
| 16592 | Sion | £ 45,276,606 | |
| 16593 | sip | £ 4,947,048 | |
| 16594 | SIPAPIAS | £ -5,901,721 | |
| 16595 | Sipledome | £ -8,748,379 | |
| 16596 | Sipral | £ 5,507,397 | |
| 16597 | sips co | £ 5,109,034 | |
| 16598 | Sir Humphry | £ 118,138,136 | |
| 16599 | Siren | £ 17,058,704 | |
| 16600 | sister | £ 562,523,191 | |
