| Choklad Buketten AB | Örebro | — |
| Cidrona Konsult Kommanditbolag | Karlskoga | — |
| CI elstrategi AB | Lillkyrka | — |
| Cinemere AB | Nora | — |
| cirkeln Aktiebolag | Örebro | — |
| Citric Labs AB | Örebro | — |
| Citykliniken i Örebro AB | Örebro | — |
| Citykliniken i Örebro Handelsbolag | Örebro | — |
| Claesson & Malm Bil AB | Hallsberg | — |
| Clarnex AB | Fellingsbro | — |
| CLAVIS Trafikskolan Örebro AB | Örebro | — |
| Cloudpine Management AB | Degerfors | — |
| Cloutiq Zyndicate AB | Örebro | — |
| C&M Petcare AB | Örebro | — |
| Coma Heart AB | Örebro | — |
| Comelektronik Handelsbolag | Garphyttan | — |
| Communicom Handelsbolag | Karlskoga | — |
| Consender AB | Degerfors | — |
| Consite Infra AB | Kumla | — |
| Consultco Maskin & Lyft AB | Örebro | — |
| Convergentum Handelsbolag | Örebro | — |
| Coolet Vending Handelsbolag | Karlskoga | — |
| Copix AB | Avesta | — |
| CoreSolutionsIT Örebro AB | Örebro | — |
| Corpum Handelsbolag | Örebro | — |
| COUNT IT AB | Örebro | — |
| Coworking Werket AB | Örebro | — |
| C Pac Handelsbolag | Örebro | — |
| Crimson Creative Group AB | Örebro | — |
| CS Gastronomi AB | Fjugesta | — |
| Cusanus Handelsbolag | Åmmeberg | — |
| Custom Choppers Sweden Kommanditbolag | Åtorp | — |
| Customs Consulting EO AB | Hallsberg | — |
| Dagdel Boländerna AB | Örebro | — |
| Dahlin O & G Music Handelsbolag | Bandhagen | — |
| Dalgatan Invest AB | Kumla | — |
| Daltons i Örebro AB | Örebro | — |
| Daos Handelsbolag | Örebro | — |
| Dath i Örebro AB | Örebro | — |
| Dayless AB | Kumla | — |
| Daylight Creations by Aron Karlsson AB | Örebro | — |
| Dealbator Fastigheter Handelsbolag | Örebro | — |
| DebugDuck AB | Örebro | — |
| Defencir Consulting AB | Arboga | — |
| Defid AB | Lindesberg | — |
| DEGERFORS SPORTBAR Kommanditbolag | Degerfors | — |
| Degner Solution AB | Örebro | — |
| Degracia Invictus Handelsbolag | Örebro | — |
| DeliverEat Örebro AB | Örebro | — |
| Delvert Films AB | Örebro | — |