| Caramelofy AB | Umeå | — |
| Car Deal Umeå AB | Umeå | — |
| Carina Karlsson Kommanditbolag | Stockholm | — |
| Carls betong AB | Umeå | — |
| Carlslids Bilservice AB | Umeå | — |
| Cashpier AB | Umeå | — |
| Castillo Clinic & Consulting AB | Skellefteå | — |
| Cato Bygg, Skog & Fastighet Handelsbolag | Sävar | — |
| CC90 Construction AB | Fredrika | — |
| Cerval AB | Umeå | — |
| C forest AB | Sorsele | — |
| CFV i Umeå AB | Umeå | — |
| Chech AB | Skellefteå | — |
| Chipz3D Studios AB | Skellefteå | — |
| CircuCity AB | Skellefteå | — |
| Cireva AB | Holmsund | — |
| CityGuy Kommanditbolag | Åsele | — |
| CivPrep Consulting AB | Vännäs | — |
| CJ68 Holding AB | Skellefteå | — |
| CKALA Handelsbolag | Skellefteå | — |
| Clay Keramikstudio AB | Umeå | — |
| Claynco AB | Täfteå | — |
| CLEAR Laserklinik AB | Skellefteå | — |
| Clippshopen Lars Friberg Harriet Friberg Handelsbolag | Umeå | — |
| CL Music AB | Umeå | — |
| Clockwise Handelsbolag | Umeå | — |
| Cloudarc Innovation AB | Umeå | — |
| CL Skog & Utemiljö AB | Burträsk | — |
| Clubivate AB | Umeå | — |
| Club Merch Sweden AB | Skellefteå | — |
| C&M Snickare med passion kommanditbolaget | Kåge | — |
| CN development AB | Vännäs | — |
| CN Fastighets 1 AB | Umeå | — |
| CN Fastighets 2 AB | Umeå | — |
| CN Fastighets 3 AB | Umeå | — |
| CN Fastighets 4 AB | Umeå | — |
| CN Fastighets 5 AB | Umeå | — |
| CN Fastighets AB | Umeå | — |
| Coda Studio AB | Umeå | — |
| CO Design Handelsbolag | Umeå | — |
| Cold Experience Lapland AB | Gargnäs | — |
| Comotech Handelsbolag | Skellefteå | — |
| Compence Ställning AB | Skellefteå | — |
| Compilaris AB | Bureå | — |
| Conradsson Consulting AB | Solna | — |
| COOLH Lantbruks- och transporttjänst Handelsbolag | Umeå | — |
| Co-Optimal Games AB | Jörn | — |
| Core & Co AB | Umeå | — |
| COSMOSTEKNIK HANDELSBOLAG | Vännäs | — |
| Crave Performance Handelsbolag | Skellefteå | — |