| 110% Marketing Limited | Administrative & support | 2006 |
| 23 Sumatra Road Limited | Households | 2006 |
| 266-270 Yorktown Road RTM Company Limited | Other services | 2012 |
| 3R Services Group Ltd | Construction | 2025 |
| 4 Life Photo Limited | Other services | 2021 |
| 4J Foods Ltd | Wholesale & retail | 2026 |
| 501 Solutions Limited | Construction | 2025 |
| 5IG Management Limited | Professional & scientific | 2013 |
| A & M Systems Limited | Information & communication | 1990 |
| A to Z Superstore Ltd | Wholesale & retail | 2018 |
| A&E Gaming Ltd | Other services | 2016 |
| A.M.S Automotive Limited | Wholesale & retail | 2020 |
| A2 Family Ltd | Information & communication | 2026 |
| ABC Investing Ltd | Real estate | 2019 |
| ABS Roofing & Building Ltd | Construction | 2025 |
| Academy Mews Management Company Ltd | Households | 2023 |
| Accenta Group Limited | Health & social care | 2024 |
| Accenta Healthcare Limited | Health & social care | 2011 |
| Accenta Shepperton Limited | Health & social care | 2023 |
| Accenta Woking Limited | Health & social care | 2012 |
| Acorn Plating Limited | Manufacturing | 1993 |
| Adventuring Within Limited | Other services | 2017 |
| AG Heating Solutions Ltd | Construction | 2024 |
| AGC Group Ltd | Construction | 2026 |
| AGG Garage Doors Ltd | Manufacturing | 2015 |
| Aidari Limited | Professional & scientific | 2022 |
| Aird Property Developments Ltd | Construction | 2025 |
| Ajreen Yuan Ltd | Hospitality | 2018 |
| Ajust Ltd | Professional & scientific | 2013 |
| AKA Internet Limited | Information & communication | 2007 |
| AKG Global Consulting Ltd | Other services | 2024 |
| Akhta Ltd | Construction | 2025 |
| AL Financial Services Limited | Information & communication | 2018 |
| Alexandra Moss Photography Limited | Professional & scientific | 2023 |
| Alfresco Design Ltd | Wholesale & retail | 2014 |
| ALL AS One UK | Other services | 2010 |
| ALL Starr Scaffolding Southern Limited | Construction | 2025 |
| Alldoe Ltd | Information & communication | 2026 |
| Alpha Building & Development Group Ltd | Construction | 2025 |
| Always Evolving SEO Ltd | Professional & scientific | 2018 |
| Amazing Business Ltd | Wholesale & retail | 2025 |
| Amazing People Consulting Limited | Professional & scientific | 2014 |
| Ambarrow Properties Limited | Real estate | 2021 |
| Ambassador Window Cleaning Limited | Administrative & support | 2015 |
| Ambulance & Medical Support Services (UK) Limited | Health & social care | 2012 |
| AMI Facility Management Limited | Administrative & support | 2004 |
| Amiv Builders Limited | Construction | 2011 |
| Amogh Solutions Private Limited | Professional & scientific | 2025 |
| Amome Ltd | Information & communication | 2011 |
| Amped UP Electric Limited | Construction | 2025 |
| Andover Roofing Limited | Construction | 2021 |
| Antremil Investments Private Limited | Administrative & support | 2018 |
| Apex Mechanical Contractors Ltd | Construction | 2025 |
| Appliance Services Ltd | Other services | 2015 |
| Aqualux Cleaning LLP | | 2025 |
| Aqualux Commercial Limited | Administrative & support | 2023 |
| AR Closing Ltd | Administrative & support | 2024 |
| Arion Accounting Limited | Professional & scientific | 2025 |
| Ascend Bidco Limited | Financial services | 2024 |
| Ascend Midco Limited | Financial services | 2024 |
| Ascend Project Management Ltd | Administrative & support | 2026 |
| Ascend Topco Limited | Financial services | 2024 |
| Aspire Network Solutions Limited | Information & communication | 2005 |
| Austin Inventories Limited | Administrative & support | 2007 |
| Auto Customs Accident & Repair Ltd | Wholesale & retail | 2021 |
| AWS Bathrooms Limited | Administrative & support | 2015 |
| B Squared Ltd | Administrative & support | 2000 |
| B.G. Williams & Associates Ltd | Construction | 2007 |
| B2R Limited | Extraterritorial | 2022 |
| Babbage Way 1972 Limited | Extraterritorial | 2014 |
| Balance Energy Controls Ltd | Other services | 2006 |
| Baraah Property Ltd | Real estate | 2020 |
| Barmaloveda Ltd | Manufacturing | 2025 |
| Basira Group CIC | Information & communication | 2025 |
| Basx Ltd | Manufacturing | 2021 |
| Batfink Consulting Limited | Professional & scientific | 2024 |
| Bathrooms & More Limited | Wholesale & retail | 2011 |
| BBS Solutions (London) Limited | Other services | 2018 |
| BDO10 Limited | Information & communication | 2014 |
| BDQ International Ltd. | Real estate | 1998 |
| Bearsted Management Ltd | Hospitality | 2019 |
| Beesley Wigs Limited | Other services | 2008 |
| Being YOU by Kshama Ltd | Professional & scientific | 2021 |
| Belfry Mews Management Company Limited | Other services | 2001 |
| Bellap Limited | Wholesale & retail | 2016 |
| Berkshire Garden Service Limited | Other services | 2008 |
| Berkshire Services Ltd | Manufacturing | 2016 |
| Berkshire Solar Solutions Limited | Energy | 2025 |
| Big BOY Property Limited | Real estate | 2019 |
| Big BOY Public Relations Limited | Extraterritorial | 2022 |
| Birchlands (Court) Residents Association Limited | Households | 1991 |
| BKN Properties Limited | Real estate | 2021 |
| Black Sheep IPV Limited | Construction | 2016 |
| Blossoming Bells Ltd | Wholesale & retail | 2024 |
| Blue Lobster Consulting Limited | Professional & scientific | 2015 |
| Blue Octopus Limited | Administrative & support | 2020 |
| Blush & Bold Ltd | Administrative & support | 2026 |
| BOB the Window Cleaner Ltd | Administrative & support | 2016 |
| Bobbin Baits Limited | Agriculture & fishing | 2025 |
| Bombina Glass Limited | Manufacturing | 2016 |