| Buyzon Ltd | Wholesale & retail | 2023 |
| Buzau Shop & Go Limited | Hospitality | 2023 |
| BVB Black Velvet Boutique Ltd | Extraterritorial | 2025 |
| BVG Automotive Ltd | Wholesale & retail | 2025 |
| BVG Cars Ltd | Wholesale & retail | 2021 |
| BVG NW Limited | Wholesale & retail | 2017 |
| BWA Investments Limited | Real estate | 2024 |
| BWF Non-Ferrous Limited | Wholesale & retail | 2023 |
| Bwmi Limited | Transport & logistics | 2010 |
| BY Aisha Limited | Information & communication | 2025 |
| Bybrook Wealth Management Ltd | Administrative & support | 2023 |
| Byob Global Limited | Wholesale & retail | 2026 |
| Byte Bubble Ltd | Wholesale & retail | 2025 |
| Bytechaser Limited | Information & communication | 2014 |
| BZE Limited | Hospitality | 2023 |
| BZI Ltd | Wholesale & retail | 2022 |
| C & C Properties (NW) Ltd | Real estate | 2009 |
| C & L Electrical Solutions Ltd | Construction | 2018 |
| C & M Developments NW Ltd | Construction | 2021 |
| C & M Floor and Wall Tiling Limited | Construction | 2005 |
| C & O Properties Ltd | Construction | 2014 |
| C & R Fire Protection Limited | Construction | 2004 |
| C B C Landscapes NW Ltd | Administrative & support | 2024 |
| C Breen Ducting Ltd | Construction | 2004 |
| C C Property Holding Ltd | Administrative & support | 2017 |
| C D Shaw Limited | Other services | 2024 |
| C Fixings Limited | Administrative & support | 2000 |
| C H Glazing Limited | Construction | 2017 |
| C Hurne & Sons Landscaping Ltd | Administrative & support | 2023 |
| C I a 2000 Limited | Construction | 2000 |
| C J Jewellers Limited | Wholesale & retail | 2002 |
| C J Window Cleaning Limited | Administrative & support | 2025 |
| C Keating & Co Limited | Professional & scientific | 2021 |
| C L Developments (NW) Limited | Construction | 2006 |
| C Lancaster Ltd | Financial services | 2026 |
| C Livesey Trees Ltd | Administrative & support | 2024 |
| C Mcdonald Suppliers Ltd | Wholesale & retail | 2020 |
| C Nixon Plumbing & Heating Limited | Construction | 2018 |
| C P Callaghan Ltd | Real estate | 2004 |
| C P U - Contract Polishing Upholstery Ltd | Manufacturing | 2019 |
| C R Hire and Storage Ltd | Administrative & support | 2018 |
| C Richards & Sons Ltd | Construction | 2025 |
| C Shenton Pointing Ltd | Manufacturing | 2024 |
| C Stanney & SON Limited | Construction | 2009 |
| C T Bikes Limited | Wholesale & retail | 2013 |
| C Tunstead Ltd | Construction | 2014 |
| C W Aesthetics Ltd | Other services | 2021 |
| C Walker Wholesale Ltd | Wholesale & retail | 2025 |
| C&A Unity Ltd | Administrative & support | 2019 |
| C&B Roofing & Property Services Ltd | Construction | 2023 |
| C&C International Trading Limited | Wholesale & retail | 2024 |
| C&M Fortune Ltd | Real estate | 2024 |
| C&M Projects (Oldham) Ltd | Manufacturing | 2012 |
| C&R Cleaning Ltd | Administrative & support | 2024 |
| C&S Motors Limited | Wholesale & retail | 2020 |
| C&S Properties Group Limited | Real estate | 2025 |
| C.P.D.S. Machinery Limited | Manufacturing | 2002 |
| C.T. Accountancy Limited | Professional & scientific | 2018 |
| C.Wilson Joinery&Building Ltd | Manufacturing | 2024 |
| C24 Healthcare Ltd | Health & social care | 2023 |
| C2C Pest Control & Environmental Services Limited | Professional & scientific | 2018 |
| C4 Gems (UK) Ltd | Wholesale & retail | 2024 |
| C4 Property Management Ltd | Real estate | 2019 |
| C4 Surveillance Limited | Administrative & support | 2012 |
| Ca-Mc Acquisition UK Limited | Professional & scientific | 1999 |
| Caafa Limited | Wholesale & retail | 2025 |
| CAB Properties Limited | Real estate | 2022 |
| CAB28 Ltd | Transport & logistics | 2025 |
| Cabana Cafe Limited | Hospitality | 2025 |
| Cabannacafe Limited | Manufacturing | 2025 |
| Cabe Solicitors Limited | Professional & scientific | 2020 |
| Cable Recycling Ltd | Wholesale & retail | 2023 |
| Cable Venues Limited | Hospitality | 2021 |
| Cacoaching Ltd | Arts & recreation | 2022 |
| Cactus Marketing Limited | Professional & scientific | 2018 |
| Cactus Security Solutions Ltd | Administrative & support | 2025 |
| CAD Architectural Engineering Ltd | Professional & scientific | 2025 |
| Cadete DOS Santos Ltd | Hospitality | 2022 |
| Caerwyn Foxdenton Ltd | Construction | 2022 |
| Caerwyn Investments Ltd | Financial services | 2024 |
| Cafe East Ltd | Hospitality | 2026 |
| Cafe East Oldham Ltd | Hospitality | 2020 |
| Cafe Grill Royton Ltd | Hospitality | 2023 |
| Cafe Lahore (NW) Ltd | Hospitality | 2014 |
| Cafe on the Green Oldham Ltd | Hospitality | 2025 |
| Cafes 22 Ltd | Hospitality | 2026 |
| Caffe Grande Abaco Ltd | Hospitality | 2024 |
| Caffley Hearing Limited | Wholesale & retail | 2024 |
| Cain Bridges Ltd | Professional & scientific | 2013 |
| Cairn Renewables Limited | Professional & scientific | 2016 |
| Caissa Properties LLP | | 2021 |
| CAL Property Investments Ltd | Real estate | 2026 |
| Calacaid Limited | Administrative & support | 2026 |
| Calco Flooring Services Ltd | Construction | 2023 |
| Calianos Limited | Professional & scientific | 2024 |
| Call Protect Ltd | Financial services | 2023 |
| Callistio Limited | Financial services | 2026 |
| Calm Ahead Community Interest Company | Health & social care | 2023 |
| Calson Property Limited | Households | 2024 |
| Calson Solutions Ltd | Administrative & support | 2022 |