| Brookworth (Beacon Road, Crowborough) Limited | Construction | 2021 |
| Brookworth (Burgess Hill) Limited | Construction | 2018 |
| Brookworth (Buxted) Limited | Construction | 2021 |
| Brookworth (Cheltenham) Limited | Construction | 2020 |
| Brookworth (Chilmington) Limited | Construction | 2021 |
| Brookworth (East Grinstead) Limited | Construction | 2021 |
| Brookworth (Ewhurst) Limited | Construction | 2019 |
| Brookworth (Goldbridge) Limited | Construction | 2021 |
| Brookworth (Haywards Heath) Limited | Construction | 2017 |
| Brookworth (Highlands) Limited | Construction | 2022 |
| Brookworth (Horam) Limited | Construction | 2017 |
| Brookworth (Maresfield) Limited | Construction | 2021 |
| Brookworth (Mayfield) Limited | Construction | 2022 |
| Brookworth (Meon Hills) Limited | Real estate | 2022 |
| Brookworth (Newick) Limited | Construction | 2022 |
| Brookworth (Ovingdean) Limited | Construction | 2020 |
| Brookworth (Oxshott) Limited | Real estate | 2021 |
| Brookworth (Rocks Hollow) Limited | Construction | 2015 |
| Brookworth (Rottingdean) Limited | Construction | 2023 |
| Brookworth (Sissinghurst) Limited | Construction | 2020 |
| Brookworth (South East) Limited | Construction | 2011 |
| Brookworth (South West) Limited | Construction | 2018 |
| Brookworth (Strategic) Limited | Administrative & support | 2011 |
| Brookworth (Tunbridge Wells) Limited | Construction | 2013 |
| Brookworth (Two Oaks) Limited | Construction | 2020 |
| Brookworth (Wadhurst) Limited | Construction | 2020 |
| Brookworth (Welford-On-Avon) Limited | Construction | 2022 |
| Brookworth (West Horsley) Limited | Construction | 2019 |
| Brookworth (West Street) Limited | Construction | 2013 |
| Brookworth (Wivelsfield) Limited | Construction | 2020 |
| Brookworth Estate Agents Limited | Real estate | 2011 |
| Brookworth Homes Limited | Financial services | 2011 |
| Brookworth Lettings Limited | Real estate | 2021 |
| Brookworth Partnerships Limited | Construction | 2022 |
| Brookworth Properties Limited | Real estate | 2021 |
| Brouard Architects Limited | Professional & scientific | 2007 |
| Brown and Shaw Associates Limited | Professional & scientific | 2016 |
| Brycelands & Co.Clothing (UK) Ltd | Wholesale & retail | 2021 |
| Bryherson | Financial services | 2021 |
| Bryzan Worldwide Limited | Manufacturing | 2015 |
| BSB Products Limited | Manufacturing | 2012 |
| BSL Development Limited | Wholesale & retail | 2012 |
| BT Roofing Services Limited | Construction | 2021 |
| BTR Residential Advisory Services Ltd | Professional & scientific | 2024 |
| Bubble Glass Limited | Wholesale & retail | 2019 |
| Buckland Pool & Building Company Limited | Construction | 2009 |
| Budavi Health Limited | Health & social care | 2023 |
| Buddhamagnet Limited | Information & communication | 2024 |
| Budgell Limited | Households | 1985 |
| Buds Gardens Ltd | Administrative & support | 2026 |
| Build Plus Building Contractors Limited | Construction | 2008 |
| Buildmatch Limited | Information & communication | 2026 |
| Buildservices.Co.Uk (South East) Limited | Professional & scientific | 2009 |
| Bulgarian Saturday School Zvanche Ltd | Education | 2013 |
| Burles Business Management Limited | Professional & scientific | 2010 |
| Burlington Consulting Ltd | Professional & scientific | 2018 |
| Burmester Limited | Extraterritorial | 2010 |
| Burnell Road Freehold Limited | Real estate | 2015 |
| Burnell Road RTM Company Limited | Real estate | 2013 |
| Burton Investment Partners Ltd | Professional & scientific | 2025 |
| Business Ballistics Limited | Information & communication | 2002 |
| Business Buyers UK Ltd | Other services | 2023 |
| Business Centre Consulting Limited | Real estate | 2014 |
| Business Developing Limited | Wholesale & retail | 2016 |
| Business Plans & Valuations Limited | Financial services | 2024 |
| Businesshow Limited | Professional & scientific | 2015 |
| Busy Bees Housekeeping Services Limited | Administrative & support | 1998 |
| Busy Girl Fitness Coaching Ltd | Arts & recreation | 2023 |
| Bute Rock Limited | Financial services | 2021 |
| Buttertown Ltd | Professional & scientific | 1999 |
| Butterworth Advisory Limited | Professional & scientific | 2025 |
| BW Battle Limited | Construction | 2021 |
| BWJ Homes Limited | Construction | 2017 |
| Bygot Ltd | Wholesale & retail | 2025 |
| Byron Finance Limited | Administrative & support | 2009 |
| Byron Recruitment Limited | Administrative & support | 2003 |
| Byron Tech Limited | Administrative & support | 2020 |
| C & a Giddings Limited | Wholesale & retail | 2002 |
| C & G Ahearn Limited | Construction | 2020 |
| C & H Properties Limited | Real estate | 2004 |
| C&G MEP Consultancy Ltd | Professional & scientific | 2024 |
| C.C Marine Group Limited | Financial services | 2025 |
| C.I. Colman Redland Centre Limited | Arts & recreation | 2014 |
| C.K. Contractors Limited | Real estate | 2020 |
| C3 Inns Limited | Hospitality | 1999 |
| Cafe Agricole Limited | Financial services | 2024 |
| Cafe Caribbean (Loughton) Ltd | Hospitality | 2019 |
| Cage Wine Bar Limited | Hospitality | 1997 |
| Cako Bako Limited | Information & communication | 2018 |
| Callamia Property Investments Ltd | Other services | 2020 |
| Cally Borg Limited | Other services | 2008 |
| Calypso Home Limited | Real estate | 2023 |
| Campbell and Co Architects Ltd | Professional & scientific | 2018 |
| Campbell Barr Limited | Professional & scientific | 2009 |
| Canakin Ltd | Hospitality | 2018 |
| Canary Holdings a Ltd | Real estate | 2021 |
| Candere Consulting Ltd | Professional & scientific | 2023 |
| Candler Management Limited | Professional & scientific | 2008 |
| Canterwood Partnership Limited | Construction | 2020 |
| Canto Associates Limited | Professional & scientific | 2006 |