| ID | Name | Type |
|---|---|---|
| #2631 | Code Masters Ltd | P |
| #2632 | Code Masters Plus | Z |
| #2633 | Codemasters Ltd | Z |
| #2634 | Codemonsters HG | Z |
| #2635 | CodenameV | ? |
| #2636 | Coders' Academy Interactive Group | Z |
| #2637 | Codex Software | Z |
| #19105 | Codigo Software | Z |
| #2638 | Coding Kings Software | Z |
| #18612 | Cody Sandifer | + |
| #16469 | Cogitare Computing | Z |
| #2639 | Cognito Software | Z |
| #2640 | Cole Computing | Z |
| #2641 | Coleccao Sistemas | Z |
| #2642 | Colestin Lorenz | ? |
| #16106 | Colette McDermott | + |
| #2643 | Colic | ? |
| #2644 | Colin Ajayi-Obe | + |
| #2645 | Colin Barnsley | + |
| #20959 | Colin Berg | + |