| Cherry Farm Management Company Ltd | Administrative & support | 2012 |
| Chocolate Dinosaur Ltd | Information & communication | 2023 |
| Chris Bingham Roofing & Cladding Ltd | Construction | 2022 |
| Chris Bown Consultancy Ltd | Professional & scientific | 2009 |
| Chris Hodgson Car Sales Limited | Wholesale & retail | 2011 |
| Christopher Cotton Architect Limited | Professional & scientific | 2019 |
| Church Farm (Rillington) Management Company Limited | Households | 2020 |
| CIB Propco Limited | Real estate | 2026 |
| Cinarlar Ltd | Administrative & support | 2021 |
| Circular Malton and Norton Community Interest Company | Information & communication | 2021 |
| Cisoselect Limited | Other services | 2019 |
| Ckec Limited | Professional & scientific | 2019 |
| Cladding & Sheeting Limited | Financial services | 2014 |
| Classic & Sportscar (Holdings) Limited | Other services | 1997 |
| Classic & Sportscar Limited | Wholesale & retail | 1991 |
| Classic & Sportscar Restorations Limited | Wholesale & retail | 2018 |
| Clover Renovations Ltd | Real estate | 2017 |
| CN (2013) Limited | Extraterritorial | 2013 |
| Coach & Horses Inns Ltd | Hospitality | 2018 |
| COE Catering Limited | Hospitality | 2019 |
| Coffee Spirit Co Ltd | Manufacturing | 2025 |
| Colak Retail Ltd | Wholesale & retail | 2020 |
| Colethan Limited | Hospitality | 2025 |
| Coll Power Limited | Energy | 2015 |
| Community Counselling (North Yorkshire) Limited | Health & social care | 2013 |
| Compello Fitness Ltd | Arts & recreation | 2013 |
| Complete Equipment Limited | Administrative & support | 2017 |
| Complete Holiday Properties Limited | Real estate | 2025 |
| Computer FX Limited | Information & communication | 2003 |
| Computerised Engineering Services Limited | Information & communication | 1982 |
| Condor Inspection Limited | Construction | 2017 |
| Conscious Apparel Limited | Wholesale & retail | 2019 |
| Consumer Duty Services Ltd | Professional & scientific | 2023 |
| Cooke's Carpets & Flooring Scarborough Limited | Wholesale & retail | 2026 |
| Coreplaysolutions Ltd | Construction | 2025 |
| Cosy Living Properties Limited | Real estate | 2021 |
| Cotm Limited | Financial services | 2020 |
| Countryandco Ltd | Arts & recreation | 2009 |
| County Farm Limited | Agriculture & fishing | 2009 |
| County Sports Limited | Arts & recreation | 2013 |
| Cpmc Limited | Wholesale & retail | 2002 |
| Craig Lidster Racing Limited | Arts & recreation | 2024 |
| Crambeck Management Company Limited | Households | 1989 |
| Crave Companies Limited | Extraterritorial | 2019 |
| Crave Holdings Limited | Extraterritorial | 2019 |
| Creative Software Ltd | Information & communication | 2018 |
| Cristeo Limited | Transport & logistics | 2025 |
| Croft Logs Ltd | Manufacturing | 2022 |
| Croots England Limited | Professional & scientific | 2010 |
| Croots Limited | Manufacturing | 2002 |
| Croughton Farm Leisure Limited | Financial services | 2023 |
| Crucial Media and Communications Ltd | Information & communication | 2010 |
| CS Applications Limited | Wholesale & retail | 2024 |
| CSM Sports Consultancy Ltd | Professional & scientific | 2018 |
| Cube Cctv LLP | | 2023 |
| Curt Sevices Ltd | Construction | 2024 |
| Custom Carbon Ltd | Manufacturing | 2008 |
| Cutthroat Barbers (Malton) Limited | Other services | 2022 |
| CVC Group Ltd | Construction | 2024 |
| CWE Property Holdings Limited | Real estate | 2024 |
| CWH Property Ltd | Real estate | 2024 |
| D G Cladding Services Limited | Construction | 2017 |
| D N Steel Erection Services Ltd | Construction | 2007 |
| DA Riding Limited | Other services | 2007 |
| Daddypop Limited | Wholesale & retail | 2021 |
| Dalton Newco 1 Limited | Financial services | 2023 |
| Dampcare Ltd | Construction | 2024 |
| Dands Power Ltd | Energy | 2024 |
| Darlington and Teesside Social Housing Limited | Other services | 2000 |
| Darryl Craggs Roofing Limited | Construction | 2021 |
| DAS Properties (Yorkshire) Limited | Real estate | 2020 |
| David Harrison Developments Limited | Construction | 2002 |
| David Patmore Limited | Real estate | 1959 |
| DB Yorkshire Limited | Professional & scientific | 2022 |
| DC Brickwork Ltd | Construction | 2025 |
| Decking Solutions Ltd | Construction | 2004 |
| Declan Carroll Racing Limited | Arts & recreation | 2003 |
| Defender 110 Ltd | Administrative & support | 2023 |
| Dekn Modular Ltd | Manufacturing | 2026 |
| Dennis Distribution LLP | | 2012 |
| Dent Aeronautics Limited | Arts & recreation | 2025 |
| Dentabite Limited | Wholesale & retail | 2025 |
| Derventio Bakery Limited | Manufacturing | 2010 |
| Derventio Fire and Security Limited | Administrative & support | 2019 |
| Derwent Pharmacy Limited | Health & social care | 2008 |
| Derwent Studio Malton Limited | Wholesale & retail | 2024 |
| Derwent Training Association | Education | 1988 |
| DET Commercial Solutions Limited | Manufacturing | 2025 |
| Dewargibb Limited | Real estate | 2018 |
| DH Group Malton Ltd | Construction | 2017 |
| DH Wadsworth & Sons (Malton) Limited | Agriculture & fishing | 2009 |
| Dhaka Spice Ltd | Hospitality | 2025 |
| DHP Yorkshire Limited | Financial services | 2022 |
| Diades Consulting Limited | Professional & scientific | 2014 |
| Dins Minibuses Ltd | Transport & logistics | 2025 |
| Direct Cabinets Limited | Manufacturing | 2025 |
| Direct Sourcing Solutions Limited | Wholesale & retail | 2006 |
| Distinctively Dunderdale Ltd | Wholesale & retail | 2026 |
| DKM Transportation Ltd | Transport & logistics | 2019 |
| Dog and HAT Ltd | Wholesale & retail | 2017 |