| Austen Miles Estates Limited | Real estate | 2022 |
| Auto Master Detailing Ltd | Wholesale & retail | 2022 |
| Avalon Foundries Limited | Manufacturing | 2025 |
| Avantgarde Transport Limited | Transport & logistics | 2007 |
| Avian Accounting and Business Services Limited | Professional & scientific | 1994 |
| Aviditi Ltd | Professional & scientific | 2017 |
| AWE: Artists' Woodland Enterprise C.I.C. | Agriculture & fishing | 2023 |
| Azure Point Solutions Limited | Information & communication | 2023 |
| B Cooper Scaffolding Ltd. | Administrative & support | 2016 |
| Babyballet Magic Feet LLP | | 2024 |
| BAD Machine Limited | Information & communication | 2004 |
| Badgers Mews (Cranbrook) Management Ltd | Households | 2017 |
| Badgers Mews Apartments (Cranbrook) Ltd. | Households | 2018 |
| Baldwin Estates Limited | Real estate | 2021 |
| Bang the Party Productions Ltd | Arts & recreation | 2018 |
| Barbara Thompson Ltd | Professional & scientific | 2002 |
| Bare Holdings Ltd. | Administrative & support | 2018 |
| Barras Advisory Ltd | Professional & scientific | 2026 |
| Barrington Gardens (Cavendish Road Balham) Residents Ltd | Real estate | 2015 |
| Basfam Limited | Other services | 2013 |
| Bay Pond Shaw Ltd | Agriculture & fishing | 2025 |
| BBD Interiors Limited | Construction | 2008 |
| BBJ Solutions Limited | Real estate | 2015 |
| BCP Groundworks Ltd | Construction | 2013 |
| Beamish Investments Limited | Financial services | 2010 |
| Beat the Budget Ltd | Hospitality | 2019 |
| Bedgebury Estate Limited | Agriculture & fishing | 1983 |
| Bedo Agricultural Ltd | Agriculture & fishing | 2025 |
| BEE Kind Paper Sales Limited | Wholesale & retail | 2021 |
| Beehave Ltd | Agriculture & fishing | 2011 |
| Benenden International Limited | Education | 2019 |
| Benenden School | Education | 2018 |
| Benn & Price Limited | Construction | 2002 |
| Bentleys Antique and Fine Art Auctioneers Limited | Wholesale & retail | 1995 |
| Beppes Pizza Co Ltd | Hospitality | 2021 |
| Berry Investments (Devon) Limited | Real estate | 2007 |
| Berwick Ventures Ltd | Wholesale & retail | 2020 |
| Better Business Management Limited | Wholesale & retail | 1987 |
| Better by Design Ltd | Construction | 2014 |
| Better Faster Growth Ltd | Professional & scientific | 2011 |
| Bewleykins Ltd | Construction | 2012 |
| BGH Geartech Limited | Manufacturing | 2003 |
| BGP Atlantic Ltd | Mining & quarrying | 2013 |
| Big Black COW Limited | Professional & scientific | 2011 |
| Big WOW Media Limited | Information & communication | 2018 |
| BIM Quantities Limited | Professional & scientific | 2015 |
| Bizzy Dees Ltd | Administrative & support | 2025 |
| Bkjb Holdings Ltd | Financial services | 2024 |
| Black and White Scaffolding Limited | Construction | 2024 |
| Blendcroft Limited | Real estate | 1980 |
| Blockphase Residents Management Limited | Households | 1987 |
| Bloomco Marketing Ltd | Professional & scientific | 2025 |
| Blubery Property Services Ltd | Construction | 2025 |
| Blue Moon Rising Group Ltd | Administrative & support | 2016 |
| Blue-Collar Engineering Ltd | Professional & scientific | 2021 |
| Bluebells Groundworks Limited | Construction | 2024 |
| Blueprint Solar Ltd | Construction | 2026 |
| Bluestar Strategic Solutions Ltd | Professional & scientific | 2024 |
| Blup Creations Limited | Wholesale & retail | 2019 |
| Boakes Businesses Limited | Administrative & support | 2003 |
| Boathouse Kitchen Ltd | Manufacturing | 2020 |
| Bockingfold Farm LLP | | 2010 |
| Body Therapy Pilates Ltd | Professional & scientific | 2017 |
| Boltown Limited | Real estate | 1947 |
| Bossman Sauces Ltd | Manufacturing | 2025 |
| Botleague Ltd | Education | 2025 |
| Bourne Amenity Sports Limited | Extraterritorial | 2012 |
| Bourne Sport Limited | Administrative & support | 2016 |
| BP Electrical Contractors Ltd | Construction | 2020 |
| Bright Orange Consultants Ltd | Professional & scientific | 2022 |
| British Boarding Schools Network Ltd | Professional & scientific | 2006 |
| Broadway Market Community Interest Company | Hospitality | 2008 |
| Broughton Medical Limited | Health & social care | 2013 |
| Btown Consulting Ltd | Professional & scientific | 2025 |
| Bubhurst Ltd | Financial services | 2021 |
| Burrson Group Ltd | Professional & scientific | 2026 |
| Butler House Carpets Limited | Wholesale & retail | 2001 |
| C F Carpentry Services Limited | Construction | 2005 |
| C.R.F.R.Consulting Limited | Financial services | 2021 |
| C2B Business Consulting Limited | Professional & scientific | 2014 |
| Cadac Burnt Wood Limited | Professional & scientific | 2012 |
| Calex Consulting Limited | Professional & scientific | 2013 |
| Camber Moto Limited | Manufacturing | 2014 |
| CAN Cole Limited | Real estate | 2017 |
| Candle Wise Limited | Manufacturing | 2023 |
| Capstone UK Limited | Professional & scientific | 2003 |
| Caradiaz Limited | Wholesale & retail | 2005 |
| Careers Coaching & Learning Ltd | Health & social care | 2024 |
| Catalyst Consulting Group Limited | Professional & scientific | 2019 |
| Caterclad Limited | Extraterritorial | 2002 |
| Cavcon Limited | Administrative & support | 2013 |
| CB TEC Ltd | Professional & scientific | 2017 |
| Cblb Advisors Limited | Professional & scientific | 2021 |
| Ceci's Corner Limited | Hospitality | 2024 |
| Ceem Apps Limited | Information & communication | 2016 |
| Ceem Holdings Limited | Information & communication | 2015 |
| Ceem Partnering Limited | Information & communication | 2015 |
| CFT Flooring Limited | Professional & scientific | 2004 |
| CGH Eco Design Ltd | Professional & scientific | 2023 |
| CH Lane Management Ltd | Real estate | 2022 |