- Karsten International
- Katalysis
- KaVo Dental GmbH
- KAYSER FILTERTECH GmbH
- Keatz Gmbh
- Kedma Cosmetics
- Keesing Media Group
- Kelly Scientific Resources
- Kelly Services
- Kelly Services
- KellyDeli
- Kenes Group
- Keplar Agency
- Kepler Fi
- Kerber Management Consulting
- Keser
- Kewee Media
- Keywords Studios
- KGISL
- Kidminder
- Kiiroo
- Kimberly Clark Limited
- King Impex
- Kingpin International
- Kirkbi A/S
- KIS Global Resources
- KLEKT B.V.
- Klinikum Bielefeld gem. GmbH
- knotel
- Knowble
- Knufflesitters
- Kobi Digital
- Koch Industries
- Koch Media GmbH
- KoffiePiraat.NL
- Koning Willem I College
- Koninklijke BAM Groep nv
- Konnektid
- Koppert Biological Systems
- Körber Supply Chain NL B.V.
- Korn Ferry
- KornFerry Futurestep
- Korsit B.V.
- KPMG
- KPMG - The Netherlands
- KPN
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