| Bulldog Haulage Ltd | Transport & logistics | 2024 |
| Bumble Bees Bakes Tea Room Ltd | Hospitality | 2025 |
| Burlesquercise Ltd | Arts & recreation | 2019 |
| Burley Builders Ltd | Other services | 2025 |
| Burns Street Chapel Management Company Limited | Households | 1989 |
| Burnside Builders (Derby) Ltd | Construction | 2014 |
| Busy Baker Limited | Manufacturing | 2024 |
| Buzzy Beez Office Services Ltd | Administrative & support | 2023 |
| BV Trading Limited | Arts & recreation | 2025 |
| BW Plumbing & Heating Solutions Ltd | Construction | 2021 |
| BYB Storage & Promotions Limited | Other services | 2021 |
| BZR Clothing Ltd | Wholesale & retail | 2025 |
| C & L Travel Ltd | Administrative & support | 2026 |
| C & M Aesthetics Ltd | Other services | 2023 |
| C & P Dodd Limited | Financial services | 2012 |
| C Corbett Engineering Ltd | Manufacturing | 2017 |
| C J Timms Electrical Services Limited | Construction | 1992 |
| C K Walker Limited | Construction | 2014 |
| C M Environmental Services Ltd | Extraterritorial | 2009 |
| C Webster Property & Developments Ltd | Construction | 2019 |
| C, Guest Building Contractor Ltd | Construction | 2020 |
| C.B. Utilities Limited | Construction | 2003 |
| C.J.P Logistics and Warehousing Consultancy Ltd | Professional & scientific | 2025 |
| C.P.L Construction Ltd | Construction | 2021 |
| C.P.L Developments (Nottingham) Ltd | Construction | 2021 |
| CA Computers Limited | Wholesale & retail | 2021 |
| Caadd Ltd | Hospitality | 2025 |
| CAK Electrical Limited | Energy | 2016 |
| Cake Chimp Ltd | Hospitality | 2020 |
| Caldera Park Properties Limited | Real estate | 2024 |
| Calderona Capital Ltd | Professional & scientific | 2023 |
| Cale Holdings Ltd | Financial services | 2022 |
| Calle Discovery Limited | Construction | 2021 |
| CAN Couriers Ltd | Transport & logistics | 2020 |
| Canon Electrical Ltd | Construction | 2015 |
| Canyon Property Services Limited | Real estate | 2003 |
| Capital House Marketing Limited | Wholesale & retail | 1998 |
| Capture Seven Marketing Ltd | Professional & scientific | 2025 |
| Carbitz Limited | Wholesale & retail | 2009 |
| Care Services (Midlands) Limited | Administrative & support | 2006 |
| Carioca Assets Limited | Professional & scientific | 2007 |
| Carolyn Wojtas Marketing Ltd | Administrative & support | 2016 |
| Carters Flooring (Leisure) Limited | Construction | 2012 |
| Carters Flooring (Transport) Limited | Construction | 2014 |
| Carters Prestige Ltd | Wholesale & retail | 2025 |
| Carv Property Ltd | Real estate | 2024 |
| Cascata Communications Limited | Administrative & support | 2006 |
| Castle Construction Products Limited | Manufacturing | 2015 |
| Castle Environmental Management Limited | Professional & scientific | 1997 |
| Castle Oils Limited | Water & waste | 1983 |
| Castle Waste Services Limited | Water & waste | 1978 |
| Castlegate 500 Limited | Professional & scientific | 2007 |
| Castleview Projects Limited | Real estate | 2007 |
| Catering Disposables Ltd | Wholesale & retail | 2015 |
| CATERING24 Ltd | Wholesale & retail | 1998 |
| CCH Scaffolding Ltd | Construction | 2017 |
| CCT Creative Ltd | Professional & scientific | 2006 |
| CDM (Ilkeston) Limited | Wholesale & retail | 2015 |
| Cedar Park (Ilkeston) Limited | Real estate | 2003 |
| Censor Solutions Ltd | Information & communication | 2024 |
| Central Electrics & Security Limited | Construction | 2009 |
| Central Garage Ilkeston Limited | Wholesale & retail | 2026 |
| Cetin Global Ltd | Wholesale & retail | 2025 |
| CGL Strategy Ltd | Professional & scientific | 2019 |
| Chambers Pet Store Ltd | Wholesale & retail | 2022 |
| Chambers Pet Supplies Limited | Wholesale & retail | 2003 |
| Charleys Eternal Creations Ltd | Wholesale & retail | 2025 |
| Charm'D Jewellery Ltd | Wholesale & retail | 2024 |
| Cheeky Pancakes Ltd | Hospitality | 2025 |
| Chennai Express 1 Ltd | Hospitality | 2025 |
| Cherry Bomb Confectionery Ltd | Wholesale & retail | 2025 |
| Cherrywood Interiors Design and Build LLP | | 2008 |
| CHICNOVA8 Ltd | Wholesale & retail | 2025 |
| Children of Thor Ltd | Information & communication | 2026 |
| Choreography to Go Ltd | Other services | 2003 |
| CI Spencer Ltd | Construction | 2025 |
| CIG Builders Ltd | Construction | 2026 |
| Ciloka Empire Ltd | Wholesale & retail | 2025 |
| Circled 73 Ltd | Wholesale & retail | 2021 |
| Civicbot Ltd | Information & communication | 2026 |
| CJB Packaging Holdings Limited | Professional & scientific | 2019 |
| CJL Automotive Nottingham Ltd | Wholesale & retail | 2022 |
| CJL Servicing and Repairs Ltd | Wholesale & retail | 2026 |
| CJS Experts MGT Ltd | Professional & scientific | 2023 |
| CJV Roofing Specialist Ltd | Construction | 2025 |
| CK Construct Holdings Ltd | Financial services | 2024 |
| CL Groundworks Limited | Administrative & support | 2006 |
| Clarkes Homes Limited | Real estate | 2017 |
| Clashe Civils Ltd | Construction | 2021 |
| Class in Glass Windows & Home Improvements Ltd | Construction | 2011 |
| Classyhelp Limited | Administrative & support | 2025 |
| Clean AS CAN BEE Ltd | Administrative & support | 2016 |
| Cleanbuddy Cleaning Services Ltd | Administrative & support | 2024 |
| Clear Pane Solutions Ltd | Administrative & support | 2025 |
| Clearance Guys UK Ltd | Wholesale & retail | 2026 |
| Clegg Developments Limited | Construction | 2003 |
| Clerkson House Limited | Real estate | 2024 |
| Clip, Snip & Strip Dog Grooming Limited | Other services | 2023 |
| Close Brothers Vehicle Hire Limited | Transport & logistics | 2001 |
| Cloudbrain Solutions Limited | Information & communication | 2022 |