| 00247W | C & F Quadrant Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 00190WB | C.M.S. Peripherals Ltd | YES | YES | | YES | YES | YES | YES | YES | Reg-Pending |
| 01561W | Cagentt Ltd | YES | NO | | N/A | N/A | N/A | N/A | N/A | YES |
| 01586W | Cahertec | YES | NO | | N/A | N/A | N/A | N/A | N/A | YES |
| 00799W | Calco Ireland Limited | YES | NO | | N/A | YES | YES | YES | YES | YES |
| 00706WB | Calcul International Ltd | YES | YES | | YES | YES | YES | YES | YES | YES |
| 00110W | Canon (Irl) Business Equipment Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 01229WB | Capralux Ltd | YES | YES | Light Controls | N/A | N/A | YES | YES | YES | NO |
| 01471WB | Caralynn Massage Products | YES | YES | | NO | NO | NO | NO | Reg-Pending | NO |
| 01509W | Caraquill Water | YES | NO | | N/A | N/A | N/A | N/A | YES | NO |
| 01358W | Carbon Removal System Ltd | YES | NO | | N/A | N/A | N/A | N/A | YES | YES |
| 00817WB | Cardiac Services (Ireland) Ltd | YES | YES | | YES | YES | YES | YES | YES | Reg-Pending |
| 00809WB | Carnival Trading Company Ltd | YES | YES | Cloney Audio | YES | YES | YES | YES | YES | YES |
| 01149WB | Carphone Warehouse Ltd | YES | NO | | YES | N/A | N/A | WEEE YES | Reg-Pending | Reg-Pending |
| 00614WB | Carr Engineering Supplies Ltd | YES | YES | | YES | YES | YES | YES | YES | YES |
| 00816W | Carr Sewing Machines Ltd | YES | NO | Singer Sewing Centre | YES | YES | YES | YES | YES | YES |
| 00843W | Carrigcastle Ltd | YES | NO | Prismatics | YES | YES | YES | YES | YES | YES |
| 00248WB | Cash Converters Retail Solutions Ireland Ltd | YES | NO | Cash Converters | YES | YES | YES | WEEE YES | Reg-Pending | NO |
| 00305W | Cash Counting Equipment Ltd | YES | NO | Cash Automation | YES | YES | YES | YES | YES | YES |
| 01464B | Cash On Delivery Wholesale Ltd | NO | YES | K J Ginty | NO | NO | NO | NO | Reg-Pending | NO |
| 01380WB | Cashels Sales & Rentals Ltd | YES | YES | | N/A | N/A | N/A | N/A | Reg-Pending | NO |
| 01460W | Cass Computer Ancillary Sales & Service Ltd | YES | NO | | NO | NO | NO | NO | Reg-Pending | Reg-Pending |
| 00441W | Cassidy Electrical Supply Company Ltd | YES | NO | CESCO | YES | YES | YES | YES | YES | YES |
| 00694W | Castit Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 01096WB | Castle Electrical Factors Ltd | YES | YES | City Electrical Factors | YES | N/A | N/A | YES | YES | YES |
| 01621B | Castle Mechanical Handling Company Ltd | NO | YES | | N/A | N/A | N/A | YES | YES | YES |
| 01290W | Caterquip Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 00343WB | Caulfield Industrial Ltd | YES | YES | | YES | YES | YES | YES | YES | YES |
| 01399WB | CDiscount Retail Ltd | YES | YES | | NO | NO | NO | NO | Reg-Pending | NO |
| 00842W | Celtic F.C. Ltd | YES | NO | Celtic Collection | YES | YES | YES | YES | YES | NO |
| 00397WB | Celtic Telecom Consultants Limited | YES | YES | CTC Ltd | YES | YES | YES | YES | YES | YES |
| 01072W | Central Audio Visual Systems Ltd. | YES | NO | | YES | N/A | YES | YES | NO | NO |
| 00265W | Central Business Equipment Ltd | YES | NO | CBE | YES | YES | YES | YES | YES | YES |
| 01524WB | CGS Distribution Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 00447WB | Charles Nolan & Co. (Ireland) Ltd | YES | YES | | YES | YES | YES | YES | YES | YES |
| 00338W | Charlie Shiels Limited | YES | NO | | YES | YES | YES | YES | YES | Reg-Pending |
| 01212WB | CHD Ltd | NO | YES | | N/A | N/A | N/A | YES | Reg-Pending | Reg-Pending |
| 01012WB | Cheetah Electronics Ltd | YES | YES | | Reg-Pending | Reg-Pending | Reg-Pending | Reg-Pending | Reg-Pending | Reg-Pending |
| 00351W | Chefaro Ireland Limited | YES | NO | | YES | YES | YES | YES | YES | YES |
| 01628WB | Chemical Direct Ltd | YES | YES | | Reg-Pending | Reg-Pending | Reg-Pending | Reg-Pending | Reg-Pending | Reg-Pending |
| 01505W | Chemical Systems Control Ltd | YES | NO | | Reg-Pending | NO | NO | NO | NO | NO |
| 01198B | Chevssan Ireland | NO | YES | Chevrolet/Sangyong Ireland | N/A | N/A | N/A | YES | Reg-Pending | Reg-Pending |
| 01056WB | Chubb Ireland Ltd | YES | YES | | N/A | YES | YES | YES | YES | YES |
| 00356WB | Cisco Systems Internetworking (Ireland) Ltd | YES | YES | Cisco | YES | YES | YES | YES | YES | YES |
| 00801WB | Citrix Systems Ireland Ltd | YES | YES | Citrix | YES | YES | YES | YES | YES | YES |
| 01531B | Citroen Motors Ireland Ltd | NO | YES | | N/A | N/A | N/A | N/A | N/A | Reg-Pending |
| 00377WB | Claire's Accessories UK Ltd | YES | YES | | YES | YES | YES | YES | YES | YES |
| 01071W | Clarence O'Flaherty & Co. Ltd | YES | NO | | YES | YES | YES | YES | YES | Reg-Pending |
| 00383WB | Clarity Computer (Distribution) Ltd | YES | YES | Clarity | YES | YES | YES | YES | YES | YES |
| 00826WB | Classic Hardware Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 00117WB | Clever Stuff Ltd | YES | YES | | YES | YES | YES | YES | YES | NO |
| 00200WB | Clifford Electrical Wholesalers Ltd | YES | YES | | YES | YES | YES | YES | YES | YES |
| 01189W | CN LIR Teoranta | YES | NO | | N/A | N/A | N/A | YES | YES | Reg-Pending |
| 01270W | Coca-Cola Bottlers Ireland Ltd | YES | NO | Coca Cola HBC Ireland | N/A | Reg-Pending | Reg-Pending | Reg-Pending | NO | NO |
| 01414W | Coca-Cola HBC Ireland Ltd | YES | NO | | NO | NO | NO | NO | Reg-Pending | Reg-Pending |
| 00730WB | Coffey Healthcare Ltd | YES | YES | | YES | YES | YES | YES | YES | Reg-Pending |
| 00989WB | Cognex Ltd | YES | YES | | YES | YES | YES | YES | YES | Reg-Pending |
| 00560WB | Colet Products Ltd | YES | YES | | YES | YES | YES | YES | NO | NO |
| 00318WB | Colgate-Palmolive Operations (Ireland) Ltd | YES | YES | | YES | YES | YES | YES | YES | Reg-Pending |
| 01480W | Colinwell Systems Ltd | YES | NO | Instacom | NO | NO | NO | NO | Reg-Pending | NO |
| 01169W | Collier Kitchen Supplies Limited | YES | NO | | N/A | YES | YES | YES | YES | YES |
| 01540WB | Colm O'Cleirigh | YES | YES | | N/A | N/A | N/A | N/A | N/A | Reg-Pending |
| 00939WB | Com-Tag Ltd | YES | YES | | YES | YES | YES | YES | YES | YES |
| 01095WB | Combico Ltd | YES | YES | | N/A | YES | YES | YES | YES | Reg-Pending |
| 01608B | Combilift | NO | YES | | N/A | N/A | N/A | YES | YES | YES |
| 01329W | Commercial Refrigeration Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 01593W | Commtech Solutions Ltd | YES | NO | | N/A | N/A | N/A | YES | YES | YES |
| 00563W | Communication Technology Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 01115W | Comsec Protection Systems Ltd | YES | NO | | N/A | YES | YES | YES | YES | YES |
| 01620WB | ComTag Technologies Ltd | YES | YES | | N/A | N/A | N/A | N/A | N/A | YES |
| 01343WB | Condor Group Ltd | YES | YES | | N/A | N/A | N/A | N/A | YES | YES |
| 00827WB | Conn's Cameras (Grafton Arcade) Ltd | YES | YES | Conns Cameras | YES | YES | YES | YES | YES | Reg-Pending |
| 01146W | Connectix Limited | YES | NO | | N/A | YES | YES | YES | YES | YES |
| 01082W | Convent Food Machines Ltd | YES | NO | | N/A | YES | YES | YES | YES | YES |
| 01405W | Cook Ireland Ltd | YES | NO | Cook Medical | YES | YES | YES | YES | YES | YES |
| 01182W | Coolpower Products Ltd | YES | NO | | N/A | N/A | N/A | YES | YES | YES |
| 00419WB | Cooper Lighting & Safety Ltd | YES | NO | Cooper Lighting & Safety Ltd | YES | N/A | Reg-Pending | BATT Reg-Pending | Reg-Pending | Reg-Pending |
| 00790W | Coopers Ltd | YES | NO | | N/A | YES | YES | YES | YES | YES |
| 01030W | Corcoran Food Machines Ltd | YES | NO | Corcoran Food Equipment Ltd | YES | YES | YES | YES | YES | YES |
| 01583WB | Core Electrical Ltd | YES | YES | | N/A | N/A | N/A | N/A | N/A | YES |
| 01599W | Core Vend Ltd | YES | NO | Harrington Vending Machines | N/A | N/A | N/A | N/A | N/A | YES |
| 01036W | Cork Bar & Catering Equipment Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 01362W | Cormac Mc Hugh | YES | NO | C-Mc Energy | N/A | N/A | N/A | N/A | YES | YES |
| 01614WB | Corporate Express Ireland Ltd | YES | YES | | Reg-Pending | Reg-Pending | Reg-Pending | Reg-Pending | Reg-Pending | Reg-Pending |
| 01563WB | Cottner Technologies Ltd | YES | YES | | N/A | N/A | N/A | N/A | N/A | YES |
| 01416WB | Covidien Ireland Commercial Ltd | YES | YES | | N/A | N/A | N/A | N/A | Reg-Pending | Reg-Pending |
| 00238WB | Creative Labs (Ireland) Ltd | YES | YES | | YES | YES | YES | YES | YES | YES |
| 01058W | Creevey Portable Appliance Testing Ltd | YES | NO | CPAT | YES | YES | YES | YES | YES | YES |
| 01246W | Cross Refrigeration (Ireland) Ltd | YES | NO | | N/A | YES | YES | YES | YES | YES |
| 01567W | Crowley Carbon Ltd | YES | NO | | NO | NO | NO | NO | NO | Reg-Pending |
| 01077W | Crown Paints Ireland Limited | YES | NO | | N/A | YES | YES | YES | YES | YES |
| 00112WB | CRQ Ltd | YES | YES | Tosh Medical | YES | YES | YES | YES | YES | YES |
| 01403W | Cruinn Diagnostics Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 00928W | CT3 Europe Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 00157W | Cucina Ltd | YES | NO | Kontinental Kitchens Supplies | YES | YES | YES | YES | YES | YES |
| 00720W | Cuisine de France Ltd | YES | NO | | YES | YES | YES | YES | YES | Reg-Pending |
| 00649W | Cummins - Allison Ireland Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 00885WB | Curtis Holt Ltd | YES | YES | Toolbank | YES | YES | YES | YES | YES | YES |
| 00933WB | Custom Electronics Ltd | YES | YES | | YES | YES | YES | YES | Reg-Pending | Reg-Pending |
| 00314W | Cylon Controls Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |