| Broomlee Investments Limited | Real estate | 1978 |
| Broomy Furlong Limited | Agriculture & fishing | 2020 |
| Brotherhood Electrical Services Ltd | Construction | 2025 |
| Brunel Healthcare Limited | Extraterritorial | 2003 |
| Bryans Carpentry and Joinery Limited | Construction | 2025 |
| Bryant at Hilton (Management) Company Limited | Households | 2006 |
| Bryn Celyn Residents Management Company Limited | Households | 2012 |
| BSM Distributions Ltd | Wholesale & retail | 2026 |
| BTS Leak Detection Ltd | Construction | 2023 |
| BUBBLE19 Limited | Hospitality | 2024 |
| Buchan Concrete Products Limited | Extraterritorial | 2012 |
| Buckler Spencer Limited | Professional & scientific | 2008 |
| Bugbrooke Management Company Limited | Households | 2014 |
| Bugbrooke Road (Kislingbury) Management Company Limited | Households | 2012 |
| Build Maintain Repair Ltd | Construction | 2020 |
| Buildifi Limited | Wholesale & retail | 2026 |
| Built by Bone Ltd | Arts & recreation | 2024 |
| Built: Trusted by the Trade Limited | Information & communication | 2022 |
| Buli&Sons Ltd | Transport & logistics | 2025 |
| Bulldog Supplies Limited | Wholesale & retail | 2025 |
| Bullens Field Ltd | Construction | 2026 |
| Bulls Head (Rosliston) Limited | Hospitality | 2018 |
| Bullterrier Garage (BTG) Ltd | Extraterritorial | 2021 |
| Burton Building Solutions Limited | Construction | 2006 |
| Burton Crown Ltd | Information & communication | 2014 |
| Burton GAS Services Limited | Construction | 2002 |
| Burton Wire and Tube Company Limited | Manufacturing | 1977 |
| Burton Yamaha Music School Limited | Education | 2016 |
| Busby Partners Limited | Agriculture & fishing | 2007 |
| Business Analysis & Consultancy Ltd | Information & communication | 2010 |
| Buttercross Park Residents Management Company Limited | Households | 2016 |
| Buying Buddy Limited | Wholesale & retail | 2013 |
| Buzberry Limited | Construction | 2026 |
| BWW Distribution Ltd | Wholesale & retail | 2024 |
| Bxsmrt Ltd | Wholesale & retail | 2020 |
| C & a Pickering (Finance) Limited | Professional & scientific | 1980 |
| C & H Health and Safety Limited | Construction | 2024 |
| C & R Scattergood Limited | Wholesale & retail | 2003 |
| C Brealey Services Ltd | Professional & scientific | 2012 |
| C Chadwick Property Investments Ltd | Real estate | 2023 |
| C Goodman Ltd | Construction | 2021 |
| C S Engineering Services Limited | Manufacturing | 1994 |
| C S Hill Limited | Wholesale & retail | 2003 |
| C&Kperrin Ltd | Hospitality | 2018 |
| C. G. Orme Electrical Ltd | Manufacturing | 2012 |
| C.& A.Pickering Limited | Professional & scientific | 1964 |
| C.A.P Mechanical Support Ltd | Wholesale & retail | 2023 |
| C.B Visuals Limited | Information & communication | 2020 |
| C.E Winterton Ltd | Construction | 2018 |
| CA Engineering Ltd | Mining & quarrying | 2011 |
| CA Legal Advice Services CIC | Professional & scientific | 2025 |
| Caboosecabins Ltd | Hospitality | 2025 |
| CADEN07 Limited | Hospitality | 2018 |
| Café Vape (Swad) Limited | Wholesale & retail | 2003 |
| Cain Brothers Timber Merchants Limited | Wholesale & retail | 1982 |
| Caliper Solutions Limited | Manufacturing | 2012 |
| Callerone-Tcg Ltd | Wholesale & retail | 2024 |
| Camp Timbertail Ltd | Other services | 2025 |
| Campaign to Reopen the Ivanhoe Line-Cril CIC | Other services | 2019 |
| Camsport Engineering Ltd | Professional & scientific | 2019 |
| Cannonball Runs Ltd | Transport & logistics | 2020 |
| Cantor Atkin Broker Services Limited | Professional & scientific | 2015 |
| Cantor Atkin Limited | Professional & scientific | 2013 |
| Cape Cabin Ltd | Education | 2018 |
| Capital First Finance Ltd | Financial services | 2019 |
| Car Charm Limited | Wholesale & retail | 2012 |
| Car Healer Ltd | Wholesale & retail | 2022 |
| Carcom Joinery Ltd | Construction | 2018 |
| Care Home OT Ltd | Health & social care | 2023 |
| Career Threory Ltd | Professional & scientific | 2024 |
| Caribou Electrical Ltd | Construction | 2023 |
| Caro-Eurotrans Ltd | Construction | 2026 |
| Carrington QS Limited | Professional & scientific | 2016 |
| Carwyn Henry Engineering Limited | Professional & scientific | 2012 |
| CAS Fire & Security Ltd | Construction | 2024 |
| Casa Flamingo Properties Ltd | Real estate | 2022 |
| Cassell Automotive Services Limited | Wholesale & retail | 2024 |
| Castle Croft, Bridge Street Management Company Limited | Households | 2002 |
| Castle Meadows (Tamworth) Management Limited | Households | 2003 |
| Castle Mills (Melbourne) Residents Limited | Households | 1992 |
| Castlefort Properties Limited | Real estate | 1996 |
| Castleton Limited | Wholesale & retail | 2025 |
| Castleton Recruitment Limited | Transport & logistics | 2025 |
| Cata & ALY Ltd | Water & waste | 2025 |
| Cattell RNB Limited | Health & social care | 2013 |
| Caulkley View Ltd | Households | 2019 |
| CB Fabrication & Welding Ltd | Manufacturing | 2024 |
| Cbbn Controls Ltd | Information & communication | 2016 |
| CBD Bakes Ltd | Manufacturing | 2018 |
| Cbee Conveyancing Services Ltd | Professional & scientific | 2025 |
| CBK Scaffolding Ltd | Construction | 2023 |
| CBT for Healthy Minds Limited | Health & social care | 2022 |
| CC Design Consultancy Limited | Professional & scientific | 2011 |
| Cctm Services Ltd | Construction | 2024 |
| CCW Consultancy Services Limited | Information & communication | 2009 |
| CDB Financial Solutions Ltd | Financial services | 2009 |
| Cebar Health Limited | Wholesale & retail | 2023 |
| Cedarwood Prop Limited | Real estate | 2026 |
| Central Joinery Group Ltd | Manufacturing | 2017 |
| Central Joinery Limited | Manufacturing | 1993 |