| 0007 PBX Limited | Hospitality | 2022 |
| 01ARCHITECTURE Ltd | Professional & scientific | 2020 |
| 1201 Events Limited | Arts & recreation | 2021 |
| 1DATA Group Limited | Other services | 2022 |
| 1ST Choice Lets Limited | Real estate | 2025 |
| 20 Woodstock Grove RTM Company Limited | Households | 2016 |
| 271RESOURCES Limited | Professional & scientific | 2017 |
| 2RAY-MORI Ltd. | Construction | 2019 |
| 33 Danehurst Street Freehold Limited | Households | 2024 |
| 365 Renovation Ltd | Construction | 2023 |
| 3K Estates Limited | Real estate | 2018 |
| 5P4RKY Ltd | Construction | 2026 |
| 7 Egerton Limited | Real estate | 2023 |
| 81 Mayes Road Management Company Limited | Real estate | 1978 |
| 83 Finsbury Park Road (London) Limited | Extraterritorial | 2014 |
| 91 Musley Hill RTM Company Limited | Administrative & support | 2009 |
| A & a and Sons Roofing Ltd | Construction | 2018 |
| A & J Marine Services Ltd | Transport & logistics | 2020 |
| A J Hutchins (Dunstable) Limited | Real estate | 1962 |
| A New Leaf Consultancy Limited | Professional & scientific | 2008 |
| A-List Productions Limited | Information & communication | 2006 |
| A.Flowers Consultancy Ltd | Construction | 2026 |
| Abbot Properties Ltd | Real estate | 2023 |
| ABC Theatre Arts Ltd | Arts & recreation | 2026 |
| Abercorn Advisors Limited | Information & communication | 2021 |
| Abriham Ltd | Construction | 2018 |
| AC Merchandise Ltd | Wholesale & retail | 2024 |
| Accounzz UK Ltd | Professional & scientific | 2009 |
| Aces Full Ltd | Professional & scientific | 2022 |
| Aceso AB Ltd | Professional & scientific | 2018 |
| Acquaforce Limited | Extraterritorial | 2006 |
| Acquisto Design & Management Limited | Extraterritorial | 2013 |
| Actdev Ltd | Information & communication | 2022 |
| ACTIVE8 Multi-Sports Limited | Health & social care | 2026 |
| Activeschool Limited | Education | 2023 |
| Adam Chipperfield Limited | Information & communication | 2023 |
| Adrian Aircon Limited | Construction | 2024 |
| AEL Property Limited | Real estate | 2016 |
| AES Carpenters Ltd | Construction | 2016 |
| AES Utilities Ltd | Construction | 2025 |
| Affiliates for Affiliates Ltd | Professional & scientific | 2025 |
| AG Digital Media Ltd | Professional & scientific | 2024 |
| AGB Residential Limited | Real estate | 2023 |
| Agile Consulting Partners Ltd | Information & communication | 2018 |
| Agilize Ltd | Wholesale & retail | 2023 |
| Agroberries Europe Holding Limited | Professional & scientific | 2021 |
| Agroberries Limited | Financial services | 2021 |
| Agyeman-Mensah Ltd | Real estate | 2021 |
| Air Cooling Limited | Construction | 1999 |
| Akanthou Properties Limited | Real estate | 2025 |
| AKK Constructions Ltd | Manufacturing | 2024 |
| AKW Training Ltd | Education | 2012 |
| Alexander Ross Bespoke (CN) Limited | Wholesale & retail | 2014 |
| Alexander Ross Bespoke Events Limited | Wholesale & retail | 2018 |
| Alibag Ltd | Hospitality | 2023 |
| ALL I Want Ltd | Other services | 2009 |
| ALL Little Stars Nursery Limited | Health & social care | 2025 |
| Allilon Limited | Other services | 2011 |
| Alopri Ltd | Construction | 2025 |
| Alpha Commerce Ltd | Professional & scientific | 2003 |
| Alwa Limited | Extraterritorial | 2023 |
| Always on Social Ltd | Professional & scientific | 2024 |
| Amori Health Ltd | Education | 2020 |
| AMS Family Holdings Limited | Financial services | 2025 |
| Anatolia Trading Ltd | Hospitality | 2025 |
| Anderson Clark Limited | Administrative & support | 2007 |
| Andrea Bennett London Limited | Professional & scientific | 2012 |
| Andrew Peet Limited | Professional & scientific | 2023 |
| Andrew Reeves Consulting Limited | Professional & scientific | 2015 |
| ANEMONE2911 Ltd | Wholesale & retail | 2023 |
| Anxie Talk Ltd | Information & communication | 2025 |
| AOM Holdings LLP | | 2016 |
| Apex Traders Solutions Ltd | Wholesale & retail | 2025 |
| Aquilum Ltd | Professional & scientific | 2025 |
| AR Real Ltd | Real estate | 2025 |
| AR Recruit Ltd | Administrative & support | 2024 |
| Aren Developments Ltd | Real estate | 2026 |
| ARM Futures Ltd | Real estate | 2014 |
| Aromaproxuk Ltd | Professional & scientific | 2013 |
| Arslan Properties Limited | Real estate | 2013 |
| Art Carrier Ltd | Transport & logistics | 2024 |
| ASH Site Engineering Ltd | Construction | 2017 |
| Ashpen Living Ltd | Wholesale & retail | 2025 |
| Aurelo Ltd | Households | 2025 |
| Avanti Fratelli Ltd | Wholesale & retail | 2026 |
| Avpd Ltd | Construction | 2026 |
| Axis Utilities Ltd | Real estate | 2021 |
| AZA World Limited | Extraterritorial | 2015 |
| B3 Living Development Limited | Construction | 2017 |
| Badom Ltd | Manufacturing | 2024 |
| Baes Design Ltd | Construction | 2019 |
| Baes Homes Limited | Real estate | 2019 |
| Baja Construction Ltd | Construction | 2022 |
| Balaam Murphy Limited | Professional & scientific | 2018 |
| Baldwin Homes Limited | Extraterritorial | 2007 |
| Bale Flooring Limited | Construction | 2020 |
| Balla Catering Ltd | Hospitality | 2025 |
| BAM BAM Events Limited | Other services | 2021 |
| Bambliss Ltd | Wholesale & retail | 2024 |
| Banshee Bricks Ltd | Manufacturing | 2024 |