| Burringham Village Store Ltd | Wholesale & retail | 2022 |
| Burtech Precision Engineering Limited | Extraterritorial | 2021 |
| Business Telco Ltd | Information & communication | 2015 |
| Buttonswood Limited | Manufacturing | 2009 |
| BW Coaches Limited | Transport & logistics | 2015 |
| BW Property Estates Ltd | Real estate | 2011 |
| BWL Business Services Ltd | Professional & scientific | 2022 |
| Bybird Ltd | Professional & scientific | 2023 |
| Byron Industries Ltd | Wholesale & retail | 2023 |
| Byron Lets Ltd | Real estate | 2020 |
| Bytewise Solutions Limited | Professional & scientific | 2024 |
| Bztrade Ltd | Transport & logistics | 2022 |
| C & C Transport(Barton) Ltd | Transport & logistics | 2018 |
| C & J Events Global Ltd | Administrative & support | 2024 |
| C & J Moss Transport Limited | Transport & logistics | 2005 |
| C B Structural Ltd | Professional & scientific | 2024 |
| C Blick Limited | Health & social care | 2016 |
| C Chambers Consultancy Limited | Financial services | 2014 |
| C K BBQ Ltd | Wholesale & retail | 2023 |
| C M a Civil Engineering Ltd | Construction | 2025 |
| C M Buckley Limited | Other services | 2013 |
| C R B Hair Consultancy Limited | Other services | 1998 |
| C R Fenwick Commercials Ltd | Manufacturing | 2012 |
| C Simm Commercial Services Ltd | Wholesale & retail | 2022 |
| C&K R Properties Ltd | Real estate | 2020 |
| C. & G. Welding Services (Scunthorpe) Ltd. | Professional & scientific | 1987 |
| C. Doig Plastering Ltd | Construction | 2023 |
| C. Woodward Plumbing, Heating & Property Services Limited | Construction | 2019 |
| C.Beardsley Plastering Limited | Construction | 2025 |
| C.H. Jefferson & Co. Limited | Professional & scientific | 1988 |
| C.P.S. (Nationwide) Limited | Administrative & support | 1999 |
| C.Q Incorporations Limited | Real estate | 2026 |
| C.R Coatings Ltd | Construction | 2024 |
| C7 Properties Management Limited | Real estate | 2021 |
| CAB Line Scunthorpe Ltd | Transport & logistics | 2020 |
| Cable and General Electrical Testing Services Limited | Professional & scientific | 1991 |
| Cactus Square Ltd | Information & communication | 2025 |
| Cade Estate Agency Limited | Real estate | 2018 |
| Cafe Indiependent Ltd. | Hospitality | 2013 |
| Cafe X Ravendale Limited | Hospitality | 2018 |
| Caistor House Court Management Company Limited | Real estate | 2006 |
| Cait's Hub Ltd | Wholesale & retail | 2024 |
| Cakes by Andrea Limited | Hospitality | 2021 |
| CAL Construction (Lincs) Ltd | Administrative & support | 2009 |
| Calidris Consulting Limited | Construction | 2013 |
| California Collection Limited | Other services | 2021 |
| Cam-Watch Limited | Extraterritorial | 2020 |
| Cambridge Avenue Medical Services Ltd | Health & social care | 2009 |
| Camping and Leisure Supplies Limited | Wholesale & retail | 2013 |
| Candy Bar Hospitality Ltd | Hospitality | 2026 |
| Candy Concessions Limited | Hospitality | 2025 |
| Canems Engine Management Solutions Limited | Wholesale & retail | 2013 |
| Cannons Turf Limited | Extraterritorial | 2007 |
| Canpack UK Limited | Manufacturing | 2007 |
| Canton Chinese Takeaway Limited | Hospitality | 2019 |
| Captain Elliot's Flying School Limited | Education | 2020 |
| Capua Care Ltd | Health & social care | 2025 |
| Caputo Family Ltd | Hospitality | 2025 |
| Cardionomics Limited | Health & social care | 2024 |
| CARE4U Solutions Limited | Health & social care | 2025 |
| Carmax Auto Ltd | Water & waste | 2019 |
| Carol's Cafe Ltd | Hospitality | 2026 |
| Carolina Group Ltd | Real estate | 2020 |
| Carpathian Courier Ltd | Transport & logistics | 2016 |
| Carter Civils Ltd | Construction | 2025 |
| Carters Garage Limited | Wholesale & retail | 2012 |
| Casa DUM Ltd | Real estate | 2021 |
| Caspian Group Limited | Construction | 1992 |
| Castleton 1965 Limited | Extraterritorial | 2014 |
| Castletown Holdings Limited | Financial services | 2020 |
| Cat Tech (Europe) Limited | Construction | 2002 |
| Cat Tech International Limited | Professional & scientific | 2011 |
| Cat Techs Ltd | Extraterritorial | 2009 |
| Cataleya Courier Ltd | Transport & logistics | 2025 |
| Catalyst Technicians Ltd | Real estate | 2009 |
| Catering at 43 Limited | Hospitality | 2024 |
| Cathadventure LLP | | 2024 |
| Cattracer UK Limited | Professional & scientific | 2021 |
| Catz From Mars Ltd | Agriculture & fishing | 2026 |
| Cavrock Ltd | Extraterritorial | 2025 |
| Cazandra Limited | Manufacturing | 2015 |
| Cb-Opex Ltd | Professional & scientific | 2025 |
| CBD KNG Ltd | Wholesale & retail | 2021 |
| Cbridson Rail Limited | Administrative & support | 2024 |
| CDR (Alston) Limited | Professional & scientific | 2005 |
| CDR Property Solutions Ltd | Real estate | 2020 |
| Cedar Farm Caravan Storage Limited | Other services | 2024 |
| Cedar Farm Luxury Kennels and Cattery Limited | Other services | 2024 |
| Cedargrove Consultancy Ltd | Other services | 2018 |
| Cellars International Limited | Extraterritorial | 1991 |
| Centaur Store Limited | Wholesale & retail | 2022 |
| Ceramick GAS & Property Care Ltd | Other services | 2018 |
| Certafide Ltd | Wholesale & retail | 2014 |
| Cerverus Ltd | Construction | 2019 |
| CF Harrogate Limited | Hospitality | 2025 |
| CF York Limited | Hospitality | 2025 |
| CG Advertising Limited | Professional & scientific | 2015 |
| CGM Medical Ltd | Health & social care | 2012 |
| CH Crawfords Ltd | Wholesale & retail | 2026 |
| CH Hospitality Support Ltd | Professional & scientific | 2020 |