| Scheme No | Company |
| NI 0570/04 | A E S Marconi |
| NI 0907/07 | A S K Electrical Limited |
| NI 1296/09 | A S P Safety Limited |
| NI 1343/10 | A.R.T.S. Ltd |
| NI 0230/04 | Aber Systems Ltd |
| NI 0319/04 | Acceleration Properties Ltd |
| NI 0574/04 | Active Maintenance Solutions Limited |
| NI 0273/04 | Adair & Milliken Ltd |
| NI 0732/05 | Adair Electrics Limited |
| NI 0672/05 | Adman Civil Projects Ltd |
| NI 0546/04 | Aircon Sales and Service |
| NI 1129/08 | Alan Lewis Displays Limited |
| NI 0236/04 | Alan Little Ltd t/a Little Electrical Engineers |
| NI 0576/04 | Alex Morton Contracts Ltd |
| NI 0456/04 | Alexander Bonar & Co Ltd |
| NI 0434/04 | Alexander Rankin & Son Limited |
| NI 0072/03 | Allison Contracts Ltd |
| NI 1151/08 | Allplay Ireland Ltd |
| NI 1224/09 | Alskea Contracts Ltd |
| NI 1233/09 | AM Electrical |
| NI 0697/05 | Anderson Mechanical Services |
| NI 0510/04 | Andrew Bradley Limited |
| NI 0466/04 | Annett Landscaping Limited |
| NI 0586/04 | Annvale Construction Ltd |
| NI 0262/04 | Antrim Electrical & Mechanical Engineers Limited |
| NI 0935/07 | Ardwinds Plumbing & Heating |
| NI 1185/09 | Ascot Environmental Limited |
| NI 0769/06 | Ashleigh (NI) Ltd |
| NI 1142/08 | Aughrim Building Company Ltd |
| NI 1226/09 | AW Control Systems Ltd |