| WNL Marine Electroncs B.V. | North Holland |
| Woedend | North Holland |
| Woensdag | Gelderland |
| Wolters Kluwer Health | South Holland |
| Wonderflow B.V. | |
| Wonderkind | North Holland |
| WoodWing Software | North Holland |
| Word Spinner | |
| Wordapp B.V. | |
| WordProof B.V. | |
| Workspace 365 | |
| WorkSpace6 | North Holland |
| Workwize | North Holland |
| World Data Summit | North Holland |
| World of Wireless | |
| WorldStartup | |
| Woudesign | North Brabant |
| Wowww! | Groningen |
| Wright Medical Group N.V. | |
| Writefull | |
| WSB Solutions B.V. | South Holland |
| WSOnline | Flevoland |
| Wunderman Thompson | North Holland |
| Wundermart | North Holland |
| Wuzzon | North Holland |
| WwXL | North Holland |
| Wylance ICT | North Brabant |
| Wynne Consult | Drenthe |
| Wypoon Technologies B.V. | North Brabant |
| X POS Plus | North Holland |
| X-Ample Technology B.V. | North Brabant |
| X-CAGO B.V. | Limburg |
| X-com B.V. | Limburg |
| X-tension Vormgeving & Webdesign | North Holland |
| X2com | |
| Xablu | Utrecht |
| Xafax | North Holland |
| Xantara IT | |
| Xbeste | |
| Xcellent Automatisering B.V. | Utrecht |
| XCESS Expertise Center B.V. | Utrecht |
| Xebia Netherlands B.V. | North Holland |
| Xel Media B.V. | Utrecht |
| Xelion | South Holland |
| Xeltis | North Brabant |
| Xenikos B.V. | |
| Xenolabs.Europe | Gelderland |
| Xenox Music & Media B.V. | Gelderland |
| Xentronix | North Brabant |
| Xessable B.V. | Utrecht |