| Christofer Bramwall Holding AB | Nybro | 0 tkr |
| Chuck AB | Västervik | 0 tkr |
| Cirkeln21 AB | Oskarshamn | 0 tkr |
| Cityfastigheter Sydost AB | Kalmar | 0 tkr |
| Civio II AB | Västervik | 0 tkr |
| CJK Transportservice AB | Nybro | 0 tkr |
| CJ Outlet AB | Orrefors | 0 tkr |
| CJR Utveckling AB | Västervik | 0 tkr |
| Cladistic AB | Västervik | 0 tkr |
| Claesson & Anderzén Aktiebolag | Kalmar | 0 tkr |
| Claesson & Anderzén Hotellfastighets Aktiebolag | Kalmar | 0 tkr |
| Clasons Holding i Kalmar AB | Kalmar | 0 tkr |
| Claus Zaar AB | Färjestaden | 0 tkr |
| Click-In Group AB | Färjestaden | 0 tkr |
| Click-In Patent AB | Kalmar | 0 tkr |
| Clown for a Crown AB | Kalmar | 0 tkr |
| CMD Hasselvägen AB | Fårbo | 0 tkr |
| CMW Kalmar AB | Nybro | 0 tkr |
| CNM Förvaltning AB | Rosenfors | 0 tkr |
| Coffee by Heart AB | Gunnebo | 0 tkr |
| CO Industrial Management Consulting AB | Rödeby | 0 tkr |
| Colvest AB | Oskarshamn | 0 tkr |
| comlie bostäder AB | Gullabo | 0 tkr |
| Condire AB | Västervik | 0 tkr |
| Conessa AB | Västervik | 0 tkr |
| ConnectMedia Kalmar invest AB | Kalmar | 0 tkr |
| Conny Forsberg kakel & bygg AB | Ljungbyholm | 0 tkr |
| Conny Gustafsson Förvaltning AB | Kalmar | 0 tkr |
| CONSULI Design AB | Bergkvara | 0 tkr |
| Consus International Aktiebolag | Kalmar | 0 tkr |
| Core-Oli-T AB | Kalmar | 0 tkr |
| Cornbert Invest AB | Trekanten | 0 tkr |
| Costamera real estate AB | Torsås | 0 tkr |
| Cougou & Chili AB | Helsingborg | 0 tkr |
| Credulus AB | Löttorp | 0 tkr |
| Crikka Svets AB | Gamleby | 0 tkr |
| CRITECO AB | Oskarshamn | 0 tkr |
| CRO Holding AB | Oskarshamn | 0 tkr |
| CRT Allservice i Oskarshamn AB | Oskarshamn | 0 tkr |
| CS construction system AB | Högsby | 0 tkr |
| CT Management AB | Västervik | 0 tkr |
| Cubo AB | Kalmar | 0 tkr |
| Cultura Familjehem AB | Kalmar | 0 tkr |
| Curate i Västervik AB | Västervik | 0 tkr |
| Curovir AB | Kalmar | 0 tkr |
| Curt Tappert Utveckling AB | Färjestaden | 0 tkr |
| DA1 AB | Oskarshamn | 0 tkr |
| Dackebygdens Lack Holding AB | Bergkvara | 0 tkr |
| Dacke of Sweden AB | Bergkvara | 0 tkr |
| Dafko AB | Färjestaden | 0 tkr |