| Company Fits B.V. | Apeldoorn | 2002 |
| Compliance Champs B.V. | Rotterdam | 2021 |
| ConQuest Holding B.V. | Dordrecht | 2021 |
| ConceptBuilders B.V. | Amsterdam | 2004 |
| Concha Beheer B.V. | De Rijp | 2007 |
| Concreet Projectmanagement B.V. | Vianen | 2012 |
| Confluence B.V. | Nieuw-Vennep | 2016 |
| Conjay B.V. | Valkenswaard | 1999 |
| Connect 2 Crowd B.V. | Alkmaar | 2010 |
| Connect B.V. | Amsterdam | 2021 |
| Conoship International Projects B.V. | Groningen | 2014 |
| Conpacksys B.V. | Dordrecht | 1991 |
| Conscious Being B.V. | Lijnden | 2022 |
| Consict B.V. | Bruinisse | 2002 |
| Consigliere B.V. | Nieuw-Vennep | 1998 |
| Consiglio Corporate Development B.V. | Rotterdam | 2018 |
| Constantia B.V. | Amsterdam | 1986 |
| Constructie-adviesbureau Kloosterman B.V. | Genemuiden | 2007 |
| Construction Investment Group B.V. | Werkendam | 2012 |
| Consultancy& B.V. | Berlicum | 2020 |
| Consulting Public B.V. | Bussum | 2023 |
| Consulting and Management Engineers Came B.V. | Zoeterwoude | 1963 |
| Content Strategy Holding B.V. | 's-Gravenhage | 2008 |
| Continua B.V. | Amsterdam | 1998 |
| Contraqtadvies B.V. | Rijswijk | 2021 |
| Contrisity B.V. | Maastricht | 2021 |
| Coodri B.V. | Oss | 2021 |
| Cooldown Vastgoed B.V. | Veen | 2015 |
| Coppi B.V. | Zeist | 2025 |
| Coppoolse Communicatie B.V. | Renesse | 1999 |
| Coppus Management & Consultancy International (CM&C International) B.V. | Maastricht | 2003 |
| Copubo Beheer B.V. | Heerlen | 2020 |
| Cor Kwast Holding B.V. | Petten | 2003 |
| Cordel B.V. | Sleeuwijk | 1995 |
| CoreDux Holding B.V. | Tilburg | 2022 |
| Coriovallum B.V. | Amsterdam | 2017 |
| Corlido Procurement Services B.V. | Emmen | 2003 |
| Corlido Project Supply B.V. | Emmen | 2010 |
| Corlont Beheer B.V. | Burgum | 2018 |
| Cormoran B.V. | Heelsum | 1940 |
| Cornelio Consult B.V. | Katwijk | 1999 |
| Cornelis B.V. | Reeuwijk | 1998 |
| Cornelissen Leunen Holding B.V. | Leunen | 2024 |
| Corné Janssen Advies en Beheer B.V. | Rosmalen | 1999 |
| CorpAmp B.V. | Klarenbeek | 2011 |
| Corps Diensten Holding B.V. | Abbenbroek | 2010 |
| Cortana B.V. | Heijen | 2023 |
| Cortese Interiors B.V. | Ugchelen | 2020 |
| Cortex B.V. | Waalre | 2005 |
| Corton Holding B.V. | Nieuwegein | 1999 |
| Coscoroba B.V. | Utrecht | 2009 |
| Cosmio Management B.V. | Leidschendam | 2006 |
| Cosmos Beheer B.V. | Julianadorp | 2017 |
| Cosïus B.V. | Vught | 1995 |
| Cougar Beheer B.V. | Amsterdam | 2011 |
| Count Management B.V. | Bilthoven | 1991 |
| Countermedia B.V. | Huizen | 2023 |
| Courtial Beheer B.V. | Groningen | 2011 |
| Coutinho Beheer B.V. | Muiderberg | 1977 |
| Coveja B.V. | Rotterdam | 2016 |
| Cow-n-berg B.V. | Zeist | 2001 |
| Coworks B.V. | Eerbeek | 2006 |
| Coördinatie-Centrum NED B.V. | Valkenburg | 2013 |
| Cradle Bio B.V. | Amsterdam | 2021 |
| Cradle Consult B.V. | 's-Gravenhage | 2008 |
| Cramer Milieuadvies B.V. | Amsterdam | 1999 |
| Cramond Island B.V. | Amsterdam | 2020 |
| Crankstel B.V. | Oosterbeek | 2022 |
| Crawley Management Services B.V. | Soest | 2011 |
| Creaid B.V. | Schermerhorn | 2006 |
| Creare Consultancy B.V. | Katwijk | 2006 |
| Creative Media Art B.V. | Nijkerk | 2016 |
| Cresco Invest B.V. | 's-Gravenzande | 2026 |
| Crezee Beheer B.V. | Almkerk | 2021 |
| Cripro-Spaar B.V. | Belfeld | 2016 |
| Croes Management B.V. | Utrecht | 2011 |
| Crossing Borders Group B.V. | Middelburg | 2013 |
| Crosspring B.V. | Zoetermeer | 2006 |
| Crowe Foederer Bidco B.V. | Eindhoven | 2024 |
| Crown United B.V. | Amsterdam | 2018 |
| Cruijsen Interim Management B.V. | Boxmeer | 1988 |
| Crylupus B.V. | Amsterdam | 2005 |
| Cuistot Beheer en Beleggingen B.V. | Groenlo | 1997 |
| Cumarisus B.V. | Tilburg | 2016 |
| Curso Propio Holding B.V. | Almere | 2025 |
| Custers Energy Holding B.V. | Maastricht | 2018 |
| Customeyes B.V. | Amsterdam | 2007 |
| Cybert Media B.V. | Huizen | 2003 |
| Cyruz B.V. | Heemskerk | 1996 |
| D'Osy B.V. | Wijchen | 2000 |
| D'and're Stokroos B.V. | Zeist | 1995 |
| D-MA Holding B.V. | Sint Hubert | 2022 |
| D. Boon Holding B.V. | Epe | 2011 |
| D. Bothof Holding Papendrecht B.V. | Papendrecht | 2003 |
| D. Graf B.V. | Maastricht | 1981 |
| D. Jensema Holding B.V. | Groningen | 2025 |
| D. Kruijs Holding B.V. | Leerdam | 1995 |
| D. Lagemaat Holding B.V. | Heerde | 2003 |
| D. Post Schipluiden Beheer B.V. | Schipluiden | 1991 |
| D. Slagboom Beheer B.V. | Muiderberg | 1980 |