| IAC Acoustics A/S | 2650 | Hvidovre |
| Ib Andresen Industri | 5550 | Langeskov |
| ICK Handelsselskab ApS | 8210 | Århus V |
| Idoc A/S | 9000 | Aalborg |
| IFM Electronic A/S | 2605 | Brøndby |
| In-Service | 7470 | Karup J |
| Induflex A/S | 9530 | Støvring |
| Indulak A/S | 8653 | Them |
| Industribejdsning Nord | 9220 | Aalborg Øst |
| INDUSTRISTÅL A/S | 1439 | København K |
| Indutek/Danish Tool Systems | 8930 | Randers NØ |
| Inelco Grinders A/S | 9490 | Pandrup |
| Ingemann Maskinfabrik A/S | 4000 | Roskilde |
| INOX Stål Handelsselskab A/S | 8680 | Ry |
| Intertek Dic A/S | 6000 | Kolding |
| IP Maskiner A/S | 8370 | Hadsten |
| IQ Metal A/S | 8361 | Hasselager |
| ITW Chemical Products Scandinavia ApS | 8600 | Silkeborg |
| Iwaki Nordic A/S | 3400 | Hillerød |
| Ingerslev Maskinfabrik A/S | 8361 | Hasselager |