| Blue Solutions Limited | Information & communication | 1997 |
| Blue Triangle Residential Limited | Real estate | 2017 |
| BLUE22 Sports Ltd | Information & communication | 2024 |
| Bluecurrant Limited | Information & communication | 2019 |
| Bluestone Currency Limited | Professional & scientific | 2016 |
| Bluestone Partners Ltd | Real estate | 2018 |
| Blumberg Partnership Limited | Professional & scientific | 2002 |
| BML Financial Solutions Ltd. | Financial services | 2011 |
| BMS Info Products Ltd | Information & communication | 2023 |
| BNW Ltd | Manufacturing | 2017 |
| Board Advisory Company Limited | Professional & scientific | 2023 |
| Boba Commodities Beech Limited | Financial services | 2015 |
| Boba Commodities Limited | Financial services | 2013 |
| Boba Commodities Oak Limited | Financial services | 2015 |
| Boba Commodities Willow Limited | Financial services | 2015 |
| Boba Group Limited | Financial services | 2015 |
| Boddy Performance Limited | Professional & scientific | 2026 |
| Bohemian Titan Ltd | Administrative & support | 2025 |
| BON BON Toys Limited | Wholesale & retail | 2025 |
| Bondwood Enterprises Limited | Hospitality | 2004 |
| Bordercontrol Limited | Administrative & support | 2002 |
| Bossmobi Limited | Wholesale & retail | 2021 |
| Bowman House (Farnborough) RTM Company Ltd | Households | 2021 |
| Boxing Sense Limited | Arts & recreation | 2022 |
| BP Holdings (24) Limited | Financial services | 2024 |
| Brain Tumour UK | Health & social care | 2006 |
| Bravo Zulu Consulting Limited | Professional & scientific | 2021 |
| Brcca Ltd | Real estate | 2021 |
| Brettstone Properties Ltd | Real estate | 2024 |
| Bridewell Park (Wormley) Management Company Limited | Households | 2005 |
| Bridge GAP Consulting T/A Hart Heating & Plumbing Limited | Construction | 2018 |
| Bright Angles Ltd | Professional & scientific | 2024 |
| Brighton City Property Limited | Real estate | 2002 |
| Brightstay Lettings Ltd | Real estate | 2025 |
| Brilliant Brands Ltd | Administrative & support | 2017 |
| Brilliant Humans Ltd | Professional & scientific | 2026 |
| Brilliant Jobs Ltd | Information & communication | 2019 |
| Bristow-Holmes Ltd | Arts & recreation | 2015 |
| Britannia Global Property Limited | Households | 2018 |
| Britannia Healthcare Limited | Administrative & support | 2015 |
| BRL Vehicles Ltd | Wholesale & retail | 2026 |
| Brookhouse Investments Ltd | Real estate | 2002 |
| Broomhurst Poultry & General Farms Limited | Real estate | 1945 |
| Brothers Capital Advisory Limited | Professional & scientific | 2019 |
| Brunel Consulting Limited | Administrative & support | 2003 |
| Brywins Property Limited | Real estate | 2010 |
| Buckhurst Hill Padel Club Ltd | Arts & recreation | 2025 |
| Buckingham Place (Jennetts Park) Management Company Limited | Households | 2014 |
| Buggy and Bean Play Cafe Ltd | Hospitality | 2025 |
| BUILD15 Limited | Construction | 2010 |
| Buildana Building Solutions Ltd | Construction | 2018 |
| Buildconnect (Southern) Limited | Construction | 2012 |
| Bulletproofbodies Ltd | Health & social care | 2014 |
| Buntywendy Limited | Hospitality | 2025 |
| Burchelli Consulting Limited | Professional & scientific | 2006 |
| Burlington Court Development (Aldershot) Residents' Association Limited(The) | Other services | 1976 |
| Burning Tree Consulting Ltd | Extraterritorial | 2016 |
| Burning Tree Limited | Information & communication | 2006 |
| Burning Tree Technology Ltd | Extraterritorial | 2016 |
| Burning Tree Virtual Services Ltd | Extraterritorial | 2016 |
| Burnside Animal Rehabilitation Centre Limited | Professional & scientific | 2013 |
| Burr Colman Consulting Services Limited | Professional & scientific | 2023 |
| Burtland Ltd | Professional & scientific | 2024 |
| Burtons Accountants Limited | Professional & scientific | 2002 |
| Bushman Services Ltd | Professional & scientific | 2016 |
| Business Growth Advice Ltd | Professional & scientific | 2016 |
| Business Practice Management Ltd | Administrative & support | 2016 |
| Business Writing Solutions Limited | Extraterritorial | 2010 |
| BW Technologies Limited | Wholesale & retail | 2000 |
| C & E Seeney Ltd | Construction | 2008 |
| C Gooch Installations Limited | Construction | 2006 |
| C to C SME Finance Limited | Financial services | 2014 |
| C.C.U.K.R.D.I. Limited | Professional & scientific | 2003 |
| Cadence Consultancy London Limited | Information & communication | 2020 |
| Cain Court Freehold Ltd | Financial services | 2014 |
| Caleb's Coffee Limited | Hospitality | 2020 |
| Calex Services Ltd | Construction | 2025 |
| Calliope Cyber Security Ltd | Information & communication | 2026 |
| Callum Stephenson Studio Limited | Professional & scientific | 2018 |
| Camas Fire & Life Safety Assessments Ltd | Professional & scientific | 2023 |
| Camberley Aesthetics Clinic Ltd | Other services | 2026 |
| Camberley Car Centre Limited | Wholesale & retail | 2003 |
| Campions Residents Company Limited | Households | 1993 |
| Canal Walk Residents Association Limited | Real estate | 1997 |
| Canary Islands Performing Arts Ltd | Arts & recreation | 2024 |
| Canine Rebalance Limited | Agriculture & fishing | 2019 |
| Cantine Cafe Limited | Hospitality | 2024 |
| Capeira Limited | Information & communication | 2019 |
| Capital Listings Limited | Real estate | 2023 |
| Capital Tech Limited | Information & communication | 2020 |
| CAPTIVE8 Media Limited | Information & communication | 2005 |
| Carbeon Energy Ltd | Manufacturing | 2025 |
| Carbon Limiting Technologies Limited | Professional & scientific | 2006 |
| Cardinal Solutions Limited | Professional & scientific | 2010 |
| Carley Cottage Ltd | Real estate | 2021 |
| Carlton Place (Fleet) Residents Management Company Limited | Households | 2002 |
| Caroline Ellison Counselling Ltd | Health & social care | 2019 |
| Carpe Diem Self Defence Limited | Arts & recreation | 2011 |
| Carrington Moore Estates Limited | Construction | 2008 |
| Carringtons of Oxford Limited | Wholesale & retail | 2003 |