| Wall Street Technology GmbH | Berlin |
| wallaby IT-Systems | Bavaria |
| Wallmeyer & Wallmeyer GbR | Lower Saxony |
| Walter Elektronik | Baden-Württemberg |
| Walter Eucken Institut e.V. | |
| Walter Lemmen GmbH | Bavaria |
| Walter Nagel GmbH & Co. KG | North Rhine-Westphalia |
| Walter Peter Industrieautomation GmbH & Co. KG | North Rhine-Westphalia |
| Walter Ritter GmbH & Co. KG | |
| WAM-Service GmbH | Schleswig-Holstein |
| Wandelbots GmbH | Saxony |
| Wandelbots GmbH | |
| Wanko GmbH | Bavaria |
| Wannemacher Software Service GmbH | Bavaria |
| Wannseeschulen | |
| WapplerSystems | North Rhine-Westphalia |
| wareconsult GmbH & Co. KG | Baden-Württemberg |
| WAREHaus GmbH | North Rhine-Westphalia |
| WARGdrones GmbH | |
| Warranti Holding SE | |
| Warranty Solutions GmbH | |
| Wassermann Technologie GmbH | |
| Watermann Media | |
| Waterproof Web Wizard GmbH | |
| WaterVent | |
| Wattx GmbH | |
| WAVE Distribution & Computersysteme GmbH | Hesse |
| Wavecon GmbH | Bavaria |
| Wayra Deutschland GmbH | |
| WaysOfSolutions | |
| WB Computertechnik GmbH | Schleswig-Holstein |
| WBS Blank Software GmbH | Hesse |
| WBS IT-Service GmbH | Saxony |
| WBS Training | |
| wd-systems Thomas Wagner | Hesse |
| WDRL | Bavaria |
| WDRW | Rhineland-Palatinate |
| WDS Software & Service GmbH | North Rhine-Westphalia |
| wdv Gesellschaft für Medien & Kommunikation mbH & Co. oHG | Hesse |
| WDV GmbH | Bavaria |
| We are Uhl & Friends | Rhineland-Palatinate |
| we-site | |
| we22 Solutions GmbH | |
| We4IT GmbH | Bremen |
| WeAdvise | |
| wealthpilot GmbH | |
| Wear It Berlin GmbH | |
| WeAreDotnet | |
| web & IT Solutions | Bavaria |
| WEB 'n ROLL | |