| Complisure.Io Ltd | Professional & scientific | 2025 |
| Condensation Control Ltd | Construction | 2011 |
| Conistone Plastering and Rendering Ltd | Construction | 2023 |
| Connect Financial Management Ltd | Professional & scientific | 2006 |
| Conselia Limited | Administrative & support | 2024 |
| Consumer Packaging Manufacturers Alliance Limited | Manufacturing | 2013 |
| Contrlx Europe Limited | Information & communication | 2020 |
| Convenience Stores UK (Menston) Limited | Wholesale & retail | 2022 |
| Cook Franchise Ltd | Hospitality | 2020 |
| Coopers of Ilkley Restoration Limited | Other services | 2023 |
| Coral White Properties Ltd | Real estate | 2024 |
| Coral White Property Limited | Real estate | 2024 |
| Corbetta Studio Ltd | Professional & scientific | 2022 |
| Core Innovation Limited | Professional & scientific | 2022 |
| Coremel Limited | Hospitality | 2020 |
| Corn Mill (Menston) Management Company Limited | Households | 2007 |
| Cornerstones Holdings Limited | Financial services | 2016 |
| Cornmill Art Space Ltd. | Arts & recreation | 2016 |
| Corulo Padel Ltd | Wholesale & retail | 2024 |
| Cosmedic Rejuvenation Clinic Ltd | Health & social care | 2002 |
| Cosmos Solutions Group Limited | Wholesale & retail | 2015 |
| Cottage Beams Ltd | Wholesale & retail | 2019 |
| Coubrough Holmes Ltd | Real estate | 2022 |
| Country Wide High Seat Chairs Ltd | Wholesale & retail | 2017 |
| Countryside Events (Holdings) Ltd | Financial services | 2022 |
| Countryside Events Ltd | Other services | 2011 |
| Countryside Stretch Tents Ltd | Wholesale & retail | 2022 |
| Court Computers Limited | Other services | 2014 |
| Covet Shop Ltd | Wholesale & retail | 2014 |
| Cozy Realty (South) Ltd | Real estate | 2026 |
| CP News Ltd | Wholesale & retail | 2024 |
| CR Stoves Limited | Construction | 2022 |
| Crabtree Care Homes Services Limited | Administrative & support | 2008 |
| Craftscale Ltd | Information & communication | 2019 |
| Crag Developments Limited | Real estate | 2007 |
| Crag Investments Limited | Real estate | 2009 |
| Crag Properties Limited | Real estate | 2010 |
| Cragg House Holdings Ltd | Construction | 2025 |
| Craig Business Affairs Limited | Professional & scientific | 2010 |
| Craiglands Gardens Management Company Limited | Households | 2018 |
| Craster Rocks Limited | Professional & scientific | 2017 |
| Craven Park Limited | Professional & scientific | 2000 |
| Credas Technologies Ltd. | Information & communication | 2016 |
| Crest-Line Properties Ltd | Real estate | 2024 |
| Cricket Coaching Mats Limited | Manufacturing | 2006 |
| Croft 3776 Limited | Construction | 2021 |
| Croft Roofing Limited | Construction | 1991 |
| Croftmoor Ltd | Real estate | 2026 |
| Cromack Properties Ltd | Real estate | 2026 |
| Cross Corporate Solutions Ltd | Professional & scientific | 2019 |
| Crossbeck House Management Limited | Households | 2006 |
| Crossbeck Woodland Ltd | Agriculture & fishing | 2024 |
| Crossfit Skipton Ltd | Arts & recreation | 2014 |
| Crossgrove Associates Limited | Professional & scientific | 2009 |
| Crossgrove Boxes Ltd | Manufacturing | 2019 |
| Crown Removals & Storage Ilkley Ltd | Transport & logistics | 2020 |
| Crown Removals Ilkley Limited | Other services | 2014 |
| Crownfast Presentational Packaging Limited | Manufacturing | 2009 |
| Crux Strategy Ltd | Professional & scientific | 2008 |
| CS Construction Consulting Ltd | Professional & scientific | 2024 |
| CS Newsome Ltd | Professional & scientific | 2016 |
| Cs-Roost Developments Ltd | Construction | 2015 |
| CTI 2000 | Health & social care | 2000 |
| Cundell Properties Limited | Real estate | 2025 |
| Cunningham Estates Ltd | Real estate | 2021 |
| Curly Hill Investments Limited | Professional & scientific | 2024 |
| Curtain Pole Store Limited | Wholesale & retail | 2018 |
| Curvor Ltd | Information & communication | 2012 |
| Cutaway Limited | Other services | 2014 |
| Cyamites Ltd | Financial services | 2025 |
| Cyberfit Ltd | Information & communication | 2024 |
| Cyrus Bridge Limited | Information & communication | 2023 |
| Cyrus Enterprises Limited | Information & communication | 2000 |
| D C Roberts Ltd | Construction | 2022 |
| D D H Joinery Limited | Construction | 2012 |
| D W S Ottelay LLP | | 2009 |
| D2M3 (Yorkshire) Limited | Real estate | 2016 |
| D5 Holdco Limited | Real estate | 2025 |
| Dacres Commercial Ltd | Real estate | 2013 |
| Dacres Company Secretarial Limited | Real estate | 2021 |
| Dacres Craven Letting Limited | Real estate | 2026 |
| Dacres Limited | Professional & scientific | 2006 |
| Daddycode Limited | Information & communication | 2008 |
| Daedalian Furniture Limited | Manufacturing | 2015 |
| DAG ( Yorks) Ltd | Hospitality | 2019 |
| Dakin Developments Limited | Construction | 2016 |
| Dakin Properties Ltd | Real estate | 2024 |
| Dalehead Properties Limited | Real estate | 1999 |
| Daleside House (Ilkley) Limited | Households | 2007 |
| Dalesway Oven Cleaning Ltd | Administrative & support | 2025 |
| Dalton Lane Properties Limited | Real estate | 2015 |
| Damon Bull Developments Ltd | Real estate | 2022 |
| Dangermouse Inc Limited | Wholesale & retail | 2014 |
| Dan’S DEN at Christchurch | Hospitality | 2015 |
| Dark Star Training Ltd | Agriculture & fishing | 2025 |
| Darkwood Croft Management Company Limited | Households | 2020 |
| Darren Stevenson IFA Ltd | Professional & scientific | 2019 |
| Darren Tammany Limited | Other services | 2016 |
| Data Dive Ltd | Professional & scientific | 2022 |
| Data Driven HR Ltd | Other services | 2021 |