| Birchmore Ltd | Real estate | 2018 |
| Birington Limited | Real estate | 1958 |
| BJW Productions Limited | Other services | 2024 |
| Blakes Southern Ltd | Professional & scientific | 2026 |
| Blcn Solutions Ltd | Professional & scientific | 2018 |
| Block Design Consultancy Limited | Professional & scientific | 2017 |
| Blossom Care Agency Limited | Health & social care | 2017 |
| Blossom Tree Limited | Real estate | 2013 |
| Blue and White Squared Ltd | Information & communication | 2012 |
| Blue Dog HR Limited | Administrative & support | 2021 |
| Bluegizmo Limited | Wholesale & retail | 2014 |
| Bluehaven Capital Partners Limited | Financial services | 2010 |
| Bluehaven Investments Limited | Financial services | 2017 |
| Blueslice Ltd | Professional & scientific | 2017 |
| BM Build Ltd | Construction | 2023 |
| Board Insight Limited | Professional & scientific | 2020 |
| Board Vision Limited | Professional & scientific | 2020 |
| Boat Life Limited | Education | 2019 |
| Body Conditioning Corporate Fitness Limited | Arts & recreation | 2016 |
| Body Conditioning Small Group PT Limited | Arts & recreation | 2025 |
| Body Fitness Studio Limited | Education | 2023 |
| Body Shop Compliance Services Ltd | Professional & scientific | 2024 |
| Bodylase Medical Ltd | Wholesale & retail | 2015 |
| Bodymapper Health Ltd | Education | 2022 |
| Bodyworks Osteopathy Limited | Health & social care | 2013 |
| Bokaj Ltd | Professional & scientific | 1999 |
| Bond Engineering Services Ltd | Construction | 2007 |
| Bones Fiduciary Ltd | Professional & scientific | 2026 |
| Boodwah Limited | Manufacturing | 2012 |
| Booker & West VAT Consultants Limited | Professional & scientific | 2009 |
| Bookkeeping Solutions Plus Ltd | Professional & scientific | 2018 |
| Boorer Lock and Safe Co Limited | Construction | 2014 |
| Bordean Manor Management Company Limited | Households | 1997 |
| Bordean Project Management Limited | Professional & scientific | 2025 |
| Bordon Masonic Properties Limited | Real estate | 1973 |
| Botanica Medica Ltd | Health & social care | 2003 |
| Botanicals South Downs Ltd | Wholesale & retail | 2020 |
| Boulter Mossman Limited | Administrative & support | 2009 |
| Boundstone Developments Limited | Construction | 2012 |
| Bourne Home Interiors Limited | Wholesale & retail | 2020 |
| Bourne River Consultants (2010) Limited | Administrative & support | 2010 |
| Bower Commercial Limited | Real estate | 2023 |
| Bowes Moor Aviation Limited | Transport & logistics | 2022 |
| Box Post LLP | | 2019 |
| BP1 DEV Ltd | Construction | 2020 |
| BP2 DEV Ltd | Households | 2025 |
| BPS Plumbing Solutions Ltd | Construction | 2022 |
| Brass Band Management Limited | Information & communication | 2020 |
| Breathe Festival Ltd | Administrative & support | 2012 |
| Breeze View Farm Limited | Agriculture & fishing | 2019 |
| Brendan Mccormack Ltd | Arts & recreation | 2018 |
| Brian Robins Management Limited | Construction | 2014 |
| Bricolage Limited | Construction | 2006 |
| Bridalclean Ltd | Other services | 2016 |
| Brideshead Films Limited | Information & communication | 2007 |
| Brigade One Limited | Information & communication | 2013 |
| Bright Digs Limited | Real estate | 2019 |
| Bright Eggs Limited | Real estate | 2011 |
| Bright Star Records Ltd | Information & communication | 2016 |
| Broadwood Farm Residents Management Company Limited | Real estate | 2001 |
| Brookfell Limited | Real estate | 1994 |
| Buckmore Advisory Ltd | Professional & scientific | 2024 |
| Buidhe Holdings Ltd | Financial services | 2024 |
| Build & Bite Catering Ltd | Hospitality | 2023 |
| Buriton Bells Limited | Hospitality | 2025 |
| Buriton Enterprise Limited | Administrative & support | 1995 |
| Buriton Estates Limited | Agriculture & fishing | 1988 |
| Burley Geach Solicitors LLP | | 2017 |
| Burst Digital Ltd | Information & communication | 2022 |
| Butcher and Larder Limited | Wholesale & retail | 2020 |
| Butler Butcher Limited | Education | 2003 |
| Butterface Cakes Ltd | Wholesale & retail | 2019 |
| Butterfield Therapies Ltd | Administrative & support | 2016 |
| Buyes Ltd | Information & communication | 2025 |
| Byways Investments Limited | Financial services | 2016 |
| C & F Bright Solutions Limited | Other services | 2004 |
| C&L Giordano Ltd | Information & communication | 2021 |
| CAB Screens Ltd | Construction | 2008 |
| Cabana Emson Ltd | Financial services | 2023 |
| Cabin Brand Design Limited | Professional & scientific | 2025 |
| CAD World (UK) Limited | Professional & scientific | 2004 |
| Cadence PR Limited | Professional & scientific | 2016 |
| Caltest Instruments Limited | Wholesale & retail | 1992 |
| Campachoochoo Limited | Hospitality | 2021 |
| Candle Cavern Ltd | Manufacturing | 2015 |
| Canopy Content Limited | Information & communication | 2026 |
| Captainjv Limited | Information & communication | 2022 |
| Caracal Services Limited | Manufacturing | 2002 |
| CARBON350 Solutions Ltd | Manufacturing | 2025 |
| Cardales Limited | Manufacturing | 1997 |
| Carders Croft Management Company Ltd | Households | 2017 |
| Care Friends Limited | Information & communication | 2018 |
| Caribbean Travel Ltd | Administrative & support | 2019 |
| Caroline Shanley Limited | Education | 2026 |
| Casa Construction (South) Ltd | Construction | 2020 |
| Casa Verde Properties Limited | Real estate | 2013 |
| Casmin Construction Limited | Construction | 1994 |
| Catriona Miranda Joy Mclean Ltd | Extraterritorial | 2022 |
| Caught in Flight Films Limited | Information & communication | 2011 |
| Caught in Flight Productions Limited | Information & communication | 2012 |