| Abedin Fast Food Ltd | Hospitality | 2026 |
| Abhb (Sussex) Limited | Professional & scientific | 2018 |
| Abhra Limited | Professional & scientific | 2019 |
| ACB Properties Limited | Professional & scientific | 1999 |
| Ace Care Excel Limited | Professional & scientific | 2014 |
| Ace Real Estate Investments Limited | Real estate | 2021 |
| Acorn Tourism Consulting Ltd | Professional & scientific | 2002 |
| Activated Spaces Ltd | Professional & scientific | 2021 |
| Acutus Energy Limited | Energy | 2019 |
| Adminimiser Limited | Administrative & support | 2011 |
| Adventure Rope Co. Limited | Other services | 2001 |
| AEI Financial Limited | Professional & scientific | 2022 |
| Ai-Ki Limited | Arts & recreation | 2016 |
| AJD Holdings Ltd | Wholesale & retail | 2026 |
| Albion Mews RTM Company Limited | Households | 2024 |
| Aleph Stratagems Limited | Professional & scientific | 2021 |
| Alex Macdonald Limited | Information & communication | 2007 |
| Alfille Innovations Limited | Wholesale & retail | 2004 |
| Alfille Trading Limited | Wholesale & retail | 2006 |
| Ally Scott Limited | Professional & scientific | 2024 |
| Alteus Limited | Wholesale & retail | 2017 |
| Alteus Wines Limited | Wholesale & retail | 2018 |
| Altps Co. Ltd | Administrative & support | 2023 |
| Am/Pm Real Estate LLP | | 2008 |
| Amanton Logistics Limited | Transport & logistics | 2019 |
| Amli Project Management Limited | Professional & scientific | 2022 |
| Analyse This Ltd | Professional & scientific | 2004 |
| Anatomic Focus Limited | Wholesale & retail | 2014 |
| Anna Daniels Consultancy Ltd | Real estate | 2021 |
| AOS Solutions Limited | Professional & scientific | 2016 |
| AP Land Ltd | Construction | 2020 |
| Apparently Ltd | Arts & recreation | 2022 |
| Appleterre Consulting Limited | Professional & scientific | 2017 |
| Approved Business Limited | Information & communication | 2009 |
| Aqua Marine Products Limited | Wholesale & retail | 2018 |
| Aragrove Limited | Manufacturing | 1993 |
| ARC Microtech Limited | Professional & scientific | 2008 |
| Arcobaleno Media Ltd. | Information & communication | 2010 |
| Argo Nikao Global Ltd | Other services | 2025 |
| Arlingham House RTM Company Limited | Households | 2025 |
| Ashleigh Blush Limited | Other services | 2023 |
| Ashley Engineering Ltd | Professional & scientific | 2025 |
| Ashpark Services Limited | Other services | 1999 |
| AT & MA Holdings Limited | Financial services | 2023 |
| Atex (UK) Limited | Wholesale & retail | 2001 |
| Aureon Projects Ltd | Construction | 2025 |
| Aurora ID Ltd | Other services | 2019 |
| Avaria Ltd | Professional & scientific | 2023 |
| Axionshift Talent Ltd | Administrative & support | 2025 |
| Ayomini Ikusika Limited | Wholesale & retail | 2016 |
| B Squared Resolution Limited | Professional & scientific | 2019 |
| Baboush Design Ltd | Manufacturing | 2022 |
| Backroom Limited | Administrative & support | 1997 |
| Bakery House RTM Company Limited | Households | 2011 |
| Balfron Properties Ltd | Real estate | 2018 |
| Bardown Farm Ltd | Real estate | 2026 |
| Barn OWL (Venusta) Limited | Professional & scientific | 2003 |
| Barnett's Books Limited | Wholesale & retail | 2020 |
| Barnside Court (North) RTM Company Limited | Households | 2016 |
| Barnside Court (South) RTM Company Limited | Households | 2016 |
| Barnside Court (West) RTM Company Limited | Households | 2016 |
| BBB Projects and Design Limited | Manufacturing | 2014 |
| Beech Court (Polegate) RTM Company Limited | Households | 2024 |
| Beechlands Management Company Limited | Households | 1995 |
| Bella's Dog Boutique Ltd | Other services | 2019 |
| BEN Greig Motors Limited | Wholesale & retail | 1990 |
| BEN Hammond Consulting Limited | Professional & scientific | 2015 |
| Bensfield Farm LLP | | 2014 |
| Bespoke Worktops Ltd | Manufacturing | 2023 |
| Best Beech Building and Joinery Limited | Administrative & support | 2009 |
| Bewl Water Vineyard Limited | Manufacturing | 2020 |
| Bishopsgate House RTM Company Limited | Households | 2025 |
| Blakelock Advisory Ltd | Real estate | 2023 |
| Blue Forest (UK) Ltd | Construction | 2009 |
| BM Vehicle Solutions Limited | Financial services | 2024 |
| Bowler Consulting Ltd | Professional & scientific | 2025 |
| Bracken House (Manchester) RTM Company Limited | Households | 2022 |
| Bramall Homes Ltd | Construction | 2019 |
| Breaking Productions Limited | Information & communication | 2005 |
| Brimstone Electrical Systems Limited | Construction | 2014 |
| Britannia House RTM Company Limited | Households | 2021 |
| Brockwood Homes Ltd | Construction | 2020 |
| Bronte Court RTM Company Limited | Households | 2023 |
| Brookside Court (Block a) RTM Company Limited | Households | 2025 |
| Brookside Court (Block B) RTM Company Limited | Households | 2025 |
| BTE Industrial Roofing & Cladding Limited | Construction | 2020 |
| Buckhurst Place Management Limited | Households | 2003 |
| Build & Co Creative Design Solutions Ltd | Construction | 2017 |
| Bulldog Licensing Limited | Professional & scientific | 2007 |
| Burchell Events Limited | Information & communication | 2020 |
| Burnt Lodge Limited Liability Partnership | | 2013 |
| Bury & SON Ltd | Real estate | 2026 |
| Busdevco Limited | Professional & scientific | 2014 |
| Business Research Solutions (Global) Limited | Administrative & support | 2006 |
| Buy the Weigh Ltd | Extraterritorial | 2020 |
| C Grill Ltd | Hospitality | 2025 |
| Cairn Consulting Limited | Real estate | 2023 |
| Caisters Hair Lounge Ltd | Other services | 2012 |
| Cake Films Limited | Information & communication | 2023 |
| Calverley Associates Limited | Professional & scientific | 1999 |