| BT Groundworks & Civils Limited | Construction | 2021 |
| BT Microcement Ltd | Construction | 2024 |
| BTH Clinics Ltd | Health & social care | 2017 |
| BTR Developments Ltd | Real estate | 2016 |
| Buckley Properties Limited | Real estate | 2022 |
| Buckley Roofing Ltd | Construction | 2017 |
| Budget Carpets Limited | Wholesale & retail | 2004 |
| Buffalo Box Limited | Wholesale & retail | 2009 |
| Build Revolution Limited | Construction | 2012 |
| Build, Pave & Scape Limited | Construction | 2016 |
| Building Safety Manager Training Limited | Professional & scientific | 2018 |
| Built Clear Ltd | Construction | 2025 |
| Buitelaar Production (UK) Ltd | Other services | 2011 |
| Buki Body Repairs Ltd | Wholesale & retail | 2022 |
| Bullseye Consulting Ltd | Professional & scientific | 2018 |
| BUR Konstruction Ltd | Construction | 2025 |
| Burning Orange Ltd | Wholesale & retail | 2025 |
| Burton Units Ltd | Real estate | 2023 |
| Business From the Heart Limited | Education | 2017 |
| Busy Bees Growing Project Wrexham Limited | Agriculture & fishing | 2024 |
| Butler's Beds Limited | Wholesale & retail | 2009 |
| BVM Group Holdings UK Ltd | Financial services | 2024 |
| BVV Build Ltd | Construction | 2026 |
| BW Asset Management Limited | Professional & scientific | 2025 |
| BW Financial Holdings Limited | Financial services | 2021 |
| BY Big Will Limited | Professional & scientific | 2020 |
| Bylina Tomasz 1284 Limited | Transport & logistics | 2016 |
| Byproduct Services Limited | Agriculture & fishing | 2001 |
| C & M (Manchester) Limited | Other services | 2007 |
| C & P Driver Hire Recruitment Ltd | Administrative & support | 2024 |
| C D Brereton Ltd | Administrative & support | 2013 |
| C Edwards Consultancy Ltd | Professional & scientific | 2021 |
| C L Davies Projects Limited | Construction | 2023 |
| C M Building Contractors Limited | Construction | 2019 |
| C Owen & SON Building Contractor Limited | Construction | 2019 |
| C P Pharmaceuticals Limited | Manufacturing | 1950 |
| C Plast Ltd | Construction | 2025 |
| C S V Surveying Limited | Construction | 2014 |
| C T Williams Electrical Limited | Professional & scientific | 2019 |
| C Thomas Electrical Ltd | Construction | 2019 |
| C& P Transport Services Limited | Transport & logistics | 2017 |
| C&L Groundworks Ltd | Construction | 2025 |
| C&T Renovations Ltd | Construction | 2025 |
| C-Bon Limited | Professional & scientific | 2024 |
| C. Gittins Limited | Real estate | 1999 |
| C.L Cleans Ltd | Administrative & support | 2025 |
| CA Civils Limited | Construction | 2018 |
| Cabin MAX Group Ltd | Financial services | 2023 |
| Cabin MAX Trustees Limited | Professional & scientific | 2026 |
| Cable Install Limited | Construction | 2023 |
| Cable Services Enterprises Limited | Professional & scientific | 2008 |
| Cable Services Holdings Limited | Professional & scientific | 1999 |
| Cable Services International Limited | Wholesale & retail | 2009 |
| Cable Services Investments Limited | Administrative & support | 2001 |
| Cable Services Limited | Wholesale & retail | 2004 |
| CAC Enterprise Limited | Wholesale & retail | 2014 |
| CAD Electrical and Mechanical Limited | Professional & scientific | 2011 |
| Cadia Properties Ltd | Real estate | 2026 |
| CAE Newydd Enterprises Limited | Agriculture & fishing | 2007 |
| Caego Painting Contractors Limited | Construction | 2014 |
| Caemai CYF | Professional & scientific | 2022 |
| Cafe Deli Ltd | Hospitality | 2019 |
| Cafe Rayo’S Ltd | Hospitality | 2020 |
| Cafeneo Ltd | Hospitality | 2010 |
| CAG Housing and Developments Limited | Construction | 2019 |
| Caia Engineering Limited | Professional & scientific | 2026 |
| Caia Family Holdings Limited | Real estate | 2026 |
| Caia Gardens Management Limited | Households | 2020 |
| Caia Park Barbershop Ltd | Other services | 2017 |
| Caia Park New 2 YOU (Wrexham) Ltd | Wholesale & retail | 2006 |
| Caia Park Partnership Limited | Health & social care | 1997 |
| Cakes International UK Ltd | Wholesale & retail | 2025 |
| Calan Traffic Management Ltd | Administrative & support | 2025 |
| Caldwell Data Projects Limited | Information & communication | 1983 |
| Calfire Group Limited | Administrative & support | 1989 |
| Call Miss Jones Limited | Financial services | 2018 |
| Callitech Limited | Information & communication | 1999 |
| Cambio Global Ltd | Professional & scientific | 2014 |
| Cambria Futura Ltd | Information & communication | 2021 |
| Cambria Trading Ltd | Wholesale & retail | 2021 |
| Cambrian Price Properties Limited | Real estate | 1996 |
| Cambrian Welding Services Ltd. | Administrative & support | 2023 |
| Canal Junction Limited | Information & communication | 2000 |
| Canalside Properties Napton Limited | Real estate | 2000 |
| Cancer Cure Ltd | Professional & scientific | 2018 |
| Cancer Cure Trust Limited | Information & communication | 2018 |
| Candle Knights Ltd | Other services | 2020 |
| Candylicious Wrexham Ltd | Wholesale & retail | 2020 |
| Cantab Electrical Limited | Construction | 2005 |
| Capacityuk Limited | Education | 2001 |
| Capitalseed Ltd | Professional & scientific | 2026 |
| Cappagh Consult Ltd | Construction | 2007 |
| Cappsized Ltd | Other services | 2007 |
| Captivate Customer Management Solutions Limited | Professional & scientific | 2014 |
| Car and Van Hire Wrexham Limited | Extraterritorial | 2013 |
| Car Care World Limited | Administrative & support | 2012 |
| Car Electronics Wrexham Ltd | Manufacturing | 2018 |
| Car Paints Direct Limited | Wholesale & retail | 2026 |
| Caravan and Lodge Sales Limited | Hospitality | 2025 |
| Carbon Capture Limited | Other services | 2024 |