| Wortmann AG | North Rhine-Westphalia |
| Wössner Bürocentrum GmbH | Baden-Württemberg |
| Wostbrock | Bremen |
| WOW Tech Europe GmbH | |
| WP Wissensportal GmbH | Bavaria |
| WP-Soft GmbH | Bavaria |
| wp.DATA Kommunikations GmbH | North Rhine-Westphalia |
| WPCubed | Bavaria |
| wpd onshore GmbH & Co. KG | |
| WPS - Workplace Solutions GmbH | Hamburg |
| wpt-online rund ums Internet GmbH & Co. KG | North Rhine-Westphalia |
| WPWA Team GmbH | |
| WQS Management Consultants | North Rhine-Westphalia |
| WR Systemsoftware | North Rhine-Westphalia |
| writeaguide UG (haftungsbeschränkt) | Berlin |
| Writeseed | |
| WRS Softwareentwicklung GmbH | North Rhine-Westphalia |
| WS IT Service GmbH | |
| WS-Spalluto GmbH | Baden-Württemberg |
| WSB Werbeagentur GmbH | Saxony |
| WSCAD GmbH | Bavaria |
| wsfischer | |
| WSK-Elektronik GmbH | Baden-Württemberg |
| WSV Systemhaus GmbH | |
| WSW Software GmbH | Bavaria |
| WT Systems GmbH | |
| wtec Services GmbH | |
| WTF Kooperative eG | |
| WTG Holding GmbH | |
| WTMCoodex UG (haftungsbeschränkt) | |
| WTS electronic components GmbH | Lower Saxony |
| WTV Leipziger Medien GmbH | |
| WubscH Consulting GmbH | Bavaria |
| Wuekro Electronic GmbH & Co. KG | Bavaria |
| Wulfsoft | North Rhine-Westphalia |
| Wunder GmbH & Co. KG | Hamburg |
| Wunder Mobility | |
| Wunderai GmbH | |
| Wunderdata GmbH | |
| Wunderlich Elektronik GmbH | Lower Saxony |
| Wunderpresentation | |
| Wunschlösung GmbH | |
| Wuntronic GmbH | Bavaria |
| wupp.iT | North Rhine-Westphalia |
| Wuppertaler Linux User Group | North Rhine-Westphalia |
| Würth Elektronik GmbH & Co. KG | Baden-Württemberg |
| Würth IT GmbH | |
| Württembergische Allplastik GmbH | Baden-Württemberg |
| Württembergische Verwaltungs- und Wirtschafts-Akademie e. V. | |
| Wüstenrot & Württembergische AG | |