| 123 Cleaning Ltd | Administrative & support | 2019 |
| 193 Collective Ltd | Arts & recreation | 2024 |
| 1ST Glimpse Limited | Other services | 2014 |
| 3L Teaching Ltd | Education | 2022 |
| 3PERIOD Ltd | Wholesale & retail | 2024 |
| 4X4 Rebuilding Ltd | Wholesale & retail | 2019 |
| A Beautiful Life Ltd | Wholesale & retail | 2021 |
| A. Riva and SON Shipwrights Limited | Manufacturing | 2003 |
| A1 Investors Ltd | Real estate | 2024 |
| A1 Valeting Ltd | Administrative & support | 2023 |
| A2B Travel Tech Ltd | Information & communication | 2026 |
| Aava Ltd | Professional & scientific | 2006 |
| Abstergo Consulting Ltd | Professional & scientific | 2025 |
| Acar Property Limited | Real estate | 2026 |
| Access to Growth Limited | Professional & scientific | 1994 |
| Accounting Solutions & Support Limited | Professional & scientific | 2008 |
| Achari Burnham Restaurant Ltd | Hospitality | 2025 |
| Adelphi Floral Design Limited | Other services | 2003 |
| Adpv Ltd | Information & communication | 2015 |
| Africa Critical Minerals Ltd | Financial services | 2023 |
| Air LUX Limited | Construction | 2007 |
| AJS Investors Ltd | Real estate | 2024 |
| Albert-Nimrod Limited | Transport & logistics | 2015 |
| Alexson Construction Limited | Construction | 2016 |
| Algaenic Ltd | Manufacturing | 2026 |
| ALL Square Drylining Limited | Construction | 2017 |
| ALL Stars Festival Ltd | Wholesale & retail | 2019 |
| Allen Brothers (Holdings) Limited | Financial services | 2025 |
| ALO Loco Ltd | Arts & recreation | 2025 |
| Alpha Research Tech Limited | Professional & scientific | 2024 |
| Alphacurve Ltd | Information & communication | 2022 |
| ALS Protection Ltd | Administrative & support | 2025 |
| Amazink Art Ltd | Wholesale & retail | 2023 |
| AMK Decor UK Ltd | Construction | 2025 |
| Amps AM Ltd | Manufacturing | 2025 |
| Anaservices Alton Ltd | Health & social care | 2019 |
| Anaservices Ltd | Health & social care | 2015 |
| Andent Ltd | Health & social care | 2022 |
| Andrew FMW Ltd | Construction | 2016 |
| Anthony Morris Electrical Services Limited | Construction | 2014 |
| Anthony Valentine Cuisine Limited | Hospitality | 2007 |
| Aqua Fit Senior Ltd | Arts & recreation | 2019 |
| Archimedes Property Management Solutions (Apms) Limited | Real estate | 2014 |
| Arecibo Media Ltd | Information & communication | 2012 |
| Asbestos Waste Limited | Professional & scientific | 2012 |
| Assorted Finds Outlet Ltd | Wholesale & retail | 2024 |
| ASZ FIX Building Ltd | Manufacturing | 2024 |
| AT Ace Ltd | Wholesale & retail | 2025 |
| Atherton Procurement Services Limited | Administrative & support | 2019 |
| ATI Transport Ltd | Transport & logistics | 2024 |
| ATM Global System UK Ltd | Wholesale & retail | 2025 |
| ATR Plumbing and Heating Solutions Ltd | Construction | 2024 |
| Attila PAL Ltd | Construction | 2017 |
| Audio Scout Ltd | Information & communication | 2026 |
| Aura Neural Systems Ltd | Manufacturing | 2026 |
| Autodynamic South East Limited | Wholesale & retail | 2015 |
| Aveamedix Ltd | Manufacturing | 2022 |
| Avmphoto Limited | Wholesale & retail | 2017 |
| Axon Digital Ltd | Information & communication | 2025 |
| B&E Elite Motors Ltd | Wholesale & retail | 2026 |
| B.G. Decorations Ltd | Construction | 2023 |
| Baby Bonding Limited | Wholesale & retail | 2014 |
| Back to Reality Limited | Administrative & support | 2019 |
| Balint Driver Service Limited | Transport & logistics | 2016 |
| Balogh Ltd | Transport & logistics | 2019 |
| Barbara's Cleaning Ltd | Administrative & support | 2025 |
| Bardex Logistics Ltd | Transport & logistics | 2026 |
| Barnmead Burnham Limited | Households | 2001 |
| Bartholomew F V Ltd | Real estate | 2025 |
| Basok Ltd | Manufacturing | 2025 |
| Bates and Sons Groundworks Limited | Construction | 2024 |
| BDM Projects Ltd | Construction | 2003 |
| BE OUR Guest Networking Limited | Professional & scientific | 2021 |
| Beauty Academy London Ltd | Other services | 2018 |
| BEE Handz Ltd | Administrative & support | 2016 |
| Bees Trans Limited | Transport & logistics | 2015 |
| Bela Kovacs Transport Ltd | Transport & logistics | 2017 |
| Belmimo Properties Ltd | Real estate | 2024 |
| Best Insulation Services Ltd | Construction | 2022 |
| Bestreferral Limited | Real estate | 2024 |
| Beyond Blocks Education Ltd | Wholesale & retail | 2025 |
| Beyond Gardening Ltd | Administrative & support | 2024 |
| Bigthames Business Limited | Agriculture & fishing | 2013 |
| Bilocan Ltd | Hospitality | 2016 |
| Bird Production Ltd | Transport & logistics | 2019 |
| Birdie Booth Ltd | Professional & scientific | 2024 |
| Blackmond Limited | Transport & logistics | 2017 |
| Blackwater Coffee Ltd | Manufacturing | 2024 |
| Blfl Services Ltd | Other services | 2013 |
| Blink by Vick Limited | Wholesale & retail | 2015 |
| Blue Pearl Services Ltd | Construction | 2024 |
| BMC Works Limited | Administrative & support | 2010 |
| Bodymindlab Ltd | Health & social care | 2025 |
| Boro Waters Limited | Agriculture & fishing | 2000 |
| Botas Services Ltd | Transport & logistics | 2021 |
| BOUNCE3 Ltd | Education | 2019 |
| Bouvels Ltd | Agriculture & fishing | 2021 |
| Boxmoor Hills UK Ltd | Extraterritorial | 2003 |
| BP Surgical Ltd | Health & social care | 2018 |
| Brandmasters Digital Marketing Ltd | Professional & scientific | 2025 |