| BMH Event Hire Ltd | Administrative & support | 2022 |
| BMH Event Solution Ltd | Administrative & support | 2026 |
| Bntu Locum Limited | Professional & scientific | 2022 |
| Boardoffer Limited | Households | 1997 |
| Bobby Beusencci Ltd | Professional & scientific | 2023 |
| Bobo's Beard Company Limited | Wholesale & retail | 2015 |
| Bodyworx Gym Melton Ltd | Arts & recreation | 2016 |
| Booth and Lane Ltd | Construction | 2010 |
| Booty Bounce Limited | Arts & recreation | 2023 |
| Boss Stone Masonry Limited | Construction | 2002 |
| Boundless Learning Ltd | Education | 2019 |
| Boutle Holdings Limited | Professional & scientific | 2026 |
| Bouverie Lodge Quality Foods Limited | Manufacturing | 1999 |
| Bowes & Bowes Ltd | Wholesale & retail | 2024 |
| Bowls Development Alliance | Arts & recreation | 2010 |
| Bozon Hastings Ltd | Real estate | 2004 |
| BPG Plumbing Services Ltd | Construction | 2012 |
| Bracken Property Leics Ltd | Construction | 2025 |
| Bradbury Plumbing Heating & GAS Services Ltd | Construction | 2021 |
| Brain Injury Physiotherapy Ltd | Health & social care | 2025 |
| Brands Management Limited | Wholesale & retail | 2017 |
| Brasitaly Ltd | Hospitality | 2022 |
| Bravo Studio Ltd | Information & communication | 2017 |
| Breezehighflyers Ltd | Professional & scientific | 2020 |
| Brian L. Burton (Farms) Ltd | Agriculture & fishing | 1987 |
| Brian Palmer (Pallets) Ltd | Administrative & support | 2004 |
| Brimstone Property Limited | Real estate | 2016 |
| Brindlecote Destinations Limited | Real estate | 2023 |
| Broadhead Global Limited | Professional & scientific | 2015 |
| Brockleby's Ltd | Manufacturing | 2024 |
| Brooker Flynn Architects Limited | Professional & scientific | 2010 |
| Brooksby Medical Ltd | Health & social care | 2025 |
| Brookson (5154C) Limited | Administrative & support | 2007 |
| Browning (Melton Mowbray) Limited | Wholesale & retail | 2004 |
| Bruchium Limited | Information & communication | 2025 |
| Bryan Partners Limited | Professional & scientific | 2020 |
| BSJ Management Ltd | Real estate | 2019 |
| Buckton Commercial Solutions Ltd | Professional & scientific | 2022 |
| Build Pro (EM) Limited | Financial services | 2014 |
| Buildmodern Limited | Real estate | 1999 |
| Buildvia Ltd | Construction | 2020 |
| Bulldog Practical Support Ltd | Professional & scientific | 2022 |
| Burch-Mas Ltd | Wholesale & retail | 2017 |
| Burnham Catering Ltd | Hospitality | 2023 |
| Burton Parks Limited | Hospitality | 2018 |
| Bury Street Arts Limited | Manufacturing | 2021 |
| Business Appointments Ltd | Administrative & support | 2003 |
| Buttercups Tearoom Ltd | Hospitality | 2021 |
| Butterfly Funeral Services Ltd | Other services | 2020 |
| C & a Scaffolding Ltd | Construction | 2011 |
| C & M Construction & Building Ltd | Construction | 2016 |
| C B George Ltd | Wholesale & retail | 2020 |
| C C Cleaning Management Limited | Administrative & support | 2016 |
| C C Cleaning Mids Limited | Administrative & support | 2021 |
| C C Cleaning North Limited | Administrative & support | 2021 |
| C C Cleaning South Limited | Administrative & support | 2021 |
| C C Construction (Building & Roofing) Ltd | Construction | 2011 |
| C C Plumbing Ltd | Construction | 2003 |
| C I Property Investment Notts Ltd | Real estate | 2021 |
| C&C Design Ltd | Professional & scientific | 2024 |
| C&R Restoration & Mechanical Limited | Wholesale & retail | 2026 |
| C.E.G. Consultants (Midlands) Limited | Administrative & support | 1987 |
| C.E.Turner(Engineers)Limited | Manufacturing | 1950 |
| C.R.H Car Service Ltd | Wholesale & retail | 2026 |
| CA Boorn Limited | Health & social care | 2016 |
| Cafe Allez! Limited | Hospitality | 2018 |
| Caffe Italia Limited | Administrative & support | 2008 |
| Caister Castle Limited | Administrative & support | 2004 |
| Callum Carolan Consultancy Limited | Professional & scientific | 2020 |
| Camomile Associates Limited | Public administration | 2017 |
| Campbell-Hall Properties Ltd | Real estate | 2022 |
| Campille Ltd | Professional & scientific | 2019 |
| Cape Westerly Clothing Ltd | Wholesale & retail | 2010 |
| Capella Engineering Services (Leicester) Limited | Manufacturing | 2001 |
| Captain Jacks Cafe Ltd | Hospitality | 2022 |
| Captain Seat Limited | Manufacturing | 2016 |
| Carbon Consultancy Ltd | Professional & scientific | 2024 |
| Care Halos Ltd | Administrative & support | 2025 |
| Carington Services Ltd | Real estate | 2014 |
| Carl Musson Photography Ltd | Information & communication | 2019 |
| Carl Underwood Transport Limited | Administrative & support | 2010 |
| Carolyn Spring Ltd | Education | 2017 |
| Carrier Group Holdings Ltd | Financial services | 2026 |
| Carrier Landscapes Limited | Administrative & support | 2000 |
| Carrington Bloodstock Ltd | Agriculture & fishing | 2022 |
| Cartaxo Limited | Real estate | 2023 |
| Casey Partners Ltd | Households | 2019 |
| Castle Safety Solutions Ltd | Professional & scientific | 2012 |
| Castlegate Newark Ltd | Real estate | 2024 |
| Catmose Properties Limited | Real estate | 2025 |
| Cavat Tools Limited | Wholesale & retail | 1982 |
| Cazoon Ltd | Wholesale & retail | 2021 |
| CB Defence and Strategy Consulting Ltd | Public administration | 2025 |
| CB Road Services Ltd | Wholesale & retail | 2024 |
| CCS Waterwell Construction Limited | Construction | 2016 |
| CDX Systems Limited | Professional & scientific | 2015 |
| Celandine 1960 Limited | Extraterritorial | 2013 |
| Cellartech Solutions Ltd | Manufacturing | 2009 |
| Celso Trade Ltd | Transport & logistics | 2024 |
| Cem-Spec Limited | Wholesale & retail | 1966 |