| Haco A/S | 7150 | Barrit |
| HAGENS A/S | 9530 | Støvring |
| HAJO TOOL A/S | 2665 | Vallensbæk strand |
| Handelsselskabet FL. Jørgensen ApS | 8000 | Aarhus C |
| Hans Buch A/S | 2620 | Albertslund |
| Hans Følsgaard A/S | 4600 | Køge |
| Hans Schourup A/S | 8310 | Tranbjerg |
| Harald Pihl A/S | 2970 | Hørsholm |
| Harting ApS | 7100 | Vejle |
| HBO Solutions ApS | 2200 | København N |
| Hedema A/S | 8700 | Horsens |
| Helens Rør A/S | 5500 | Middelfart |
| Helge Bruhn A/S | 6400 | Sønderborg |
| Helge Frandsen A/S | 8783 | Hornsyld |
| HellermannTyton | 4000 | Roskilde |
| Helmuth A. Jensen A/S | 2610 | Rødovre |
| HEMA Kranudstyr | 8723 | Løsning |
| Hentechsolution ApS | 2670 | Greve |
| Hermle Nordic | 5550 | Langeskov |
| Herningsholm Erhvervsskole & Gymnasier | 7400 | Herning |
| Hexagon Manufacturing Intelligence AB | 632 29 | Eskilstuna |
| HH Maskiner | 7100 | Vejle |
| HiFlux Filtration A/S | 8722 | Hedensted |
| Hindsbo Magneter ApS | 4000 | Roskilde |
| Hirtshals El-Motorservice ApS | 9850 | Hirtshals |
| HJ Rustfri Stål ApS | 9220 | Aalborg Øst |
| HMV - Hinnerup Maskinværksted A/S | 8382 | Hinnerup |
| HN Group A/S | 7190 | Billund |
| HNC Group A/S | 4241 | Vemmelev |
| Hobro Laserteknik A/S | 9500 | Hobro |
| Hobro Rustfri Procesteknik A/S | 9500 | Hobro |
| Hoffmann Group | 28832 | Achim |
| Holger Elgaard A/S | 8471 | Sabro |
| Holtec Automatic A/S | 6715 | Esbjerg N |
| Hosta Industries A/S | 9320 | Hjallerup |
| Hoyer | 8370 | Hadsten |
| HSHansen a/s | 8600 | Silkeborg |
| HSM Industri A/S | 8500 | Grenaa |
| HSØ ApS | 9320 | Hjallerup |
| HumanTrust A/S | 8381 | Tilst, Aarhus |
| Hvm A/S | 7451 | Sunds |
| Hydra-Comp A/S | 7800 | Skive |
| HydraSpecma A/S | 6900 | Skjern |
| Hydro Extrusion Denmark A/S | 6270 | Tønder |
| Hydroscand A/S | 2730 | HERLEV |
| Hymatik ApS | 5250 | Odense SV |
| Hytek A/S | 9870 | Sindal |
| HYTOR A/S | 6705 | Esbjerg Ø |
| HYTOR Tools Solutions A/S | 6705 | Esbjerg |