| Black Widow Studio Limited | Other services | 2021 |
| Blackhorse Traders Ltd | Wholesale & retail | 2018 |
| Blade & Fade 1 Ltd | Other services | 2026 |
| Blant-Harwood Holdings Limited | Real estate | 2026 |
| Bliss Real Estate Limited | Real estate | 2026 |
| Blooming Lets Limited | Real estate | 2025 |
| Blow & Hughes Limited | Wholesale & retail | 2024 |
| Blow Group Limited | Financial services | 2024 |
| Blue Glow Web Limited | Professional & scientific | 2013 |
| Blue Planet Developments Ltd. | Administrative & support | 2012 |
| Blue Skite Ltd | Wholesale & retail | 2014 |
| BMC Manufacturing Services Limited | Extraterritorial | 2011 |
| Bob-On Mobile Autos Ltd | Wholesale & retail | 2023 |
| Boneham & Turner Limited | Manufacturing | 1918 |
| Boneham Estates Limited | Real estate | 2026 |
| Bookkeeping Services (Midlands) Ltd | Professional & scientific | 2011 |
| Boosted Trading Ltd | Wholesale & retail | 2019 |
| BORN2WEB Ltd | Professional & scientific | 2011 |
| Bouncy Ballers Ltd | Arts & recreation | 2025 |
| Bower & Co Property Solutions Ltd | Real estate | 2026 |
| Bower Property Solutions Ltd | Real estate | 2026 |
| Bowkays Ltd | Wholesale & retail | 2025 |
| Bowker's Developments Ltd | Real estate | 2025 |
| Box Express Limited | Transport & logistics | 2019 |
| Box Express ME Limited | Transport & logistics | 2024 |
| Bratt's Agri Services Ltd | Financial services | 2023 |
| Bridgepoint Educare Ltd | Education | 2025 |
| Bridgeway Horizons Ltd | Health & social care | 2025 |
| British Maintenance Ltd | Construction | 2026 |
| Bronbury Services Limited | Construction | 2004 |
| Brooklyn Bridal Limited | Wholesale & retail | 2022 |
| Brookstone Group Developments Limited | Real estate | 2026 |
| Brown Bros Limited | Hospitality | 2019 |
| Brown Holdings Limited | Financial services | 2026 |
| BSJ Property Services Ltd | Real estate | 2024 |
| Building Assets Limited | Real estate | 2022 |
| Bulwell and Basford Pubs Limited | Hospitality | 2019 |
| Bunia Ltd | Hospitality | 2024 |
| Buongiorno Best Coffee Ltd | Wholesale & retail | 2023 |
| Butterworth Books CIC | Information & communication | 2021 |
| C & H Transport Services Limited | Transport & logistics | 2017 |
| C & L Associates UK Limited | Real estate | 2003 |
| C Bampton Translation Limited | Professional & scientific | 2023 |
| C M Dean Electrical Ltd | Construction | 2015 |
| C&C FA Ltd | Wholesale & retail | 2020 |
| C&C Fire Prevention Limited | Construction | 2023 |
| C&L Landscaping & Driveways Ltd | Administrative & support | 2025 |
| C4T Ltd | Professional & scientific | 2025 |
| Cable-Wave Networks Ltd | Information & communication | 2026 |
| Cables Electrical Installations Limited | Other services | 2014 |
| Cables Inspection & Testing Ltd | Professional & scientific | 2025 |
| Cables Security Limited | Administrative & support | 2024 |
| Cactocereus Ltd | Agriculture & fishing | 2023 |
| Cait Pubs Ltd | Hospitality | 2022 |
| CAL Group Green Ltd | Construction | 2026 |
| Calverton Service Centre Ltd | Wholesale & retail | 2023 |
| Camper Tech Ltd | Manufacturing | 2021 |
| Candeleria by Andreea Ltd | Manufacturing | 2024 |
| Cane Engineering Services Ltd | Manufacturing | 2021 |
| Cardwell Betts Property Group Ltd | Real estate | 2026 |
| Care Expert Solutions Ltd | Health & social care | 2022 |
| Care Home Support Team Limited | Health & social care | 2024 |
| Care Quality Improvement Limited | Health & social care | 2019 |
| Care Zentry Ltd | Administrative & support | 2025 |
| Carnarvon Grove 1961 Limited | Extraterritorial | 2014 |
| Cassey Co Properties Ltd | Real estate | 2023 |
| Cassey Developments Ltd | Construction | 2019 |
| Castle View Star Ltd | Real estate | 2024 |
| Catalyst Engineering Limited | Manufacturing | 2007 |
| Cathor Ltd. | Health & social care | 2016 |
| Cavendish Construction Building and Joinery Limited | Construction | 2016 |
| CC Connect Services Ltd. | Real estate | 2022 |
| CD Motors Logistics Limited | Wholesale & retail | 2016 |
| Celebrity Motion Furniture Limited | Manufacturing | 2000 |
| Celsius Heating Solutions Ltd | Construction | 2007 |
| Ceygro Limited | Wholesale & retail | 2025 |
| CFE Property Limited | Real estate | 2022 |
| Cgol Restaurants Ltd | Hospitality | 2020 |
| Chalkboard Creative Ltd | Information & communication | 2021 |
| Chef OZ Limited | Hospitality | 2021 |
| Chefstef Limited | Hospitality | 2022 |
| Cherish Bunuc Design Limited | Professional & scientific | 2024 |
| Chief John Honesty Projects Limited | Health & social care | 2018 |
| Chinaa Care Services Ltd | Health & social care | 2023 |
| Chris Hall Developments Limited | Real estate | 2005 |
| Christen Ltd | Hospitality | 2025 |
| Citytrust Investments Group Limited | Health & social care | 2014 |
| Citywise Courier Ltd | Transport & logistics | 2026 |
| CJ Hall Property Ltd | Real estate | 2025 |
| CJC Local Ltd | Hospitality | 2021 |
| CKC Electrical Fire and Security Ltd | Construction | 2024 |
| Clarkes Development (Midlands) Ltd | Construction | 2026 |
| Clkmrs Holding Limited | Financial services | 2024 |
| CLO Notts Pubs Ltd | Hospitality | 2020 |
| CLO Pubs Midlands Ltd | Hospitality | 2019 |
| Clubwear UK Ltd | Wholesale & retail | 2022 |
| CMK Abacus Ltd | Professional & scientific | 2018 |
| Cmli Security Limited | Administrative & support | 2017 |
| Cndb Projects Ltd | Construction | 2023 |
| Coco Vintage Ltd | Wholesale & retail | 2022 |