| B&R Industrial Automation A/S | 5260 | Odense S |
| B. Christensens Maskinfabrik Eftf.ApS | 8600 | Silkeborg |
| BarkerBille A/S | 2750 | Ballerup |
| BASE Erhverv A/S | 8700 | Horsens |
| BC Technic ApS | 6230 | Rødekro |
| Belimo A/S | 8660 | Skanderborg |
| Berg Industriservice A/S | 7400 | Herning |
| Best Energy A/S | 7200 | Grindsted |
| Betech A/S | 2730 | Herlev |
| Better Energy A/S | 1609 | København V |
| BioVent ApS | 9500 | Hobro |
| BK Engineering | 9000 | Aalborg |
| Blichfeld Power & Measurements A/S | 6000 | Kolding |
| BMS A/S | 9400 | Nørresundby |
| Boe-Therm A/S | 5610 | Assens |
| Bomberg & Co ApS | 3540 | Lynge |
| BR Electronics ApS | 2740 | Skovlunde |
| Brandt A/S | 6800 | Varde |
| Bravida Danmark A/S | 2605 | Brøndby |
| Brødrene A. & O. Johansen A/S | 2620 | Albertslund |
| BSV Krantilbehør A/S | 6600 | Vejen |
| Building Green / Insight Events ApS | 2400 | København NV |
| Bureau Veritas | 7000 | Fredericia |
| Busch Vakuumteknik A/S | 8680 | Ry |
| Busck & Co ApS | 2620 | Albertslund |