| Browning Heights Management Company Limited | Households | 2006 |
| BS Electrical Yorkshire Ltd | Construction | 2019 |
| BS Fabrications (UK) Ltd | Manufacturing | 2014 |
| BSJ Construction Services Ltd | Construction | 2020 |
| BTI Medical Skin Clinic Ltd | Health & social care | 2024 |
| Buck Building & Renovations Limited | Construction | 2026 |
| Bulmer Farm Lodges Limited | Hospitality | 2009 |
| Bumby Design Company Limited | Professional & scientific | 1996 |
| Burts Hair Studio Ltd | Other services | 2025 |
| Business Streamlined Limited | Professional & scientific | 2015 |
| Butterworth Law Limited | Professional & scientific | 2015 |
| Butterworth Marine Holdings Limited | Financial services | 2021 |
| Butterworth Marine Limited | Professional & scientific | 2015 |
| Butterworth Property Limited | Real estate | 2019 |
| Buxfam Limited | Financial services | 2024 |
| Buy Tyres Online Limited | Extraterritorial | 2013 |
| BW and DJ Glaves & Sons Limited | Manufacturing | 2003 |
| C a Wharton & SON Limited | Construction | 2003 |
| C Barr Electrical Ltd | Construction | 2021 |
| C Boyes Joiners & Builders Ltd | Construction | 2019 |
| C H Building Services Limited | Construction | 2019 |
| C Murden Ltd | Hospitality | 2025 |
| C R Greenwood Limited | Construction | 2006 |
| C.E.M Property Solutions Ltd | Real estate | 2023 |
| Cadence Textworks Ltd | Information & communication | 2026 |
| Cafe 55 Limited | Hospitality | 2017 |
| Cairnwell Properties Ltd | Real estate | 2017 |
| Cajo Limited | Hospitality | 2022 |
| Calfthwaite Farm Limited | Real estate | 2001 |
| Calvert Property Investment Ltd | Real estate | 2023 |
| Cambridge Street 1965 Limited | Extraterritorial | 2014 |
| Cameliacakes Ltd | Wholesale & retail | 2026 |
| Cammish Service Accommodation Limited | Real estate | 2024 |
| Cantrill Supplies Ltd | Wholesale & retail | 2025 |
| Canute Limited | Professional & scientific | 2009 |
| Capital Credit (Leeds) Limited | Financial services | 2009 |
| Capital North Limited | Information & communication | 2008 |
| Capitol Theatre Trust CIC | Arts & recreation | 2026 |
| Capy Link Ltd | Hospitality | 2025 |
| Car Search 2020 Management Ltd | Wholesale & retail | 2024 |
| Care for ALL Yorkshire Ltd | Other services | 2012 |
| Care Micro Systems Limited | Manufacturing | 1992 |
| Carefree Smart Homes Ltd | Wholesale & retail | 2022 |
| Carers Plus Yorkshire Ltd | Health & social care | 1995 |
| Caring Heart and Hands Ltd | Health & social care | 2015 |
| Caring Kind Home Care Ltd | Wholesale & retail | 2025 |
| CARING4CRITTERS CIC | Agriculture & fishing | 2023 |
| Carisbrooke (Scarborough) Management Company Limited | Households | 2012 |
| Carlill House (Whitby) Limited | Households | 2021 |
| Carlos Andrei Ltd | Transport & logistics | 2026 |
| Carlton Apartments (Scarborough) Limited | Households | 2025 |
| Carlyle Stays Ltd | Real estate | 2026 |
| Carriage House Glamping Pods Limited | Hospitality | 2022 |
| Carrlane Developments Limited | Financial services | 2019 |
| Carry on Entertaining Limited | Arts & recreation | 2025 |
| Carry on Printing Ltd | Manufacturing | 2020 |
| Cartrefi C & L Ltd | Real estate | 2025 |
| Carys Edge Limited | Professional & scientific | 2021 |
| Casbuild Yorkshire Ltd | Construction | 2023 |
| Cask & KEG Scarborough Limited | Hospitality | 2025 |
| Casper Electrical Solutions Ltd | Construction | 2023 |
| Casper Fire Solutions Ltd | Public administration | 2024 |
| Casterbridge Management Limited | Professional & scientific | 1993 |
| Castle Associates Limited | Professional & scientific | 1971 |
| Castle by the Sea Ltd | Hospitality | 2024 |
| Castle Employment Agency Limited | Administrative & support | 1966 |
| Castle Gate Management Limited | Real estate | 1980 |
| Castle Group Limited | Manufacturing | 1989 |
| Castle Heights Management Limited | Households | 2006 |
| Castle View Lettings Limited | Hospitality | 2019 |
| Castle View Management Company (Scarborough) Limited | Households | 2006 |
| Castleview Apartments Management Company Limited | Households | 2007 |
| Cata Flory Transport Ltd | Transport & logistics | 2026 |
| Catalogue Direct Ltd | Wholesale & retail | 2017 |
| Catering in Style Limited | Hospitality | 2014 |
| Catering in Style OSS Ltd | Hospitality | 2018 |
| Caterpac Limited | Manufacturing | 1968 |
| Cathedral&Theo Healthcare Limited | Health & social care | 2022 |
| Catherine GEE Limited | Information & communication | 2002 |
| Caveman Comics Ltd | Wholesale & retail | 2026 |
| Cayton Watches Ltd | Manufacturing | 2026 |
| CBY & JC Property Limited | Real estate | 2025 |
| CBY Construction Limited | Construction | 2019 |
| CBY Property Limited | Real estate | 2020 |
| CBYPROPERTY1 Limited | Real estate | 2023 |
| CBYPROPERTY2 Limited | Real estate | 2023 |
| CCG Medical Holdings Ltd | Financial services | 2021 |
| CCG Supplies Ltd | Information & communication | 2014 |
| Cctv Gdpr Ltd | Information & communication | 2019 |
| Cctv Legal Services Ltd | Information & communication | 2019 |
| CD & AF Cooke Limited | Professional & scientific | 2016 |
| Cedar Ridge Property Development Ltd | Real estate | 2026 |
| Cedarwood & SON Ltd | Administrative & support | 2023 |
| Ceepee Engineering Services Limited | Professional & scientific | 2015 |
| Celestial Assets Ltd | Financial services | 2023 |
| Celestial Link Ltd | Real estate | 2021 |
| Cello Builders Ltd | Construction | 2024 |
| Cello Properties Ltd | Real estate | 2023 |
| Cenegex Aviation Limited | Transport & logistics | 2025 |
| Cenegex Compliance Ltd | Professional & scientific | 2024 |