| 7OAKS Lawn Care and Maintenance Ltd | Administrative & support | 2026 |
| 7OAKS Traders Ltd | Hospitality | 2025 |
| 7OAKS Valeting Ltd | Administrative & support | 2025 |
| 8 & 9 Brickmakers Meadows RTM Company Ltd | Households | 2026 |
| 8 ST Johns Court Management Company Limited | Administrative & support | 2009 |
| 8 Stavordale Road Flat Owners Limited | Households | 2004 |
| 8 the Drive (Residents) Limited | Professional & scientific | 1993 |
| 8FIGURES Official Ltd | Wholesale & retail | 2025 |
| 9 Pembroke Road Developments Limited | Real estate | 2019 |
| 9 Shorndean Street Catford (Freehold) Limited | Households | 2024 |
| 939 8TH Avenue Ltd | Real estate | 2017 |
| 9INE Consulting Limited | Professional & scientific | 2015 |
| 9MP Freehold Limited | Households | 2020 |
| A & G Productions Limited | Information & communication | 2005 |
| A & J House Building Contractors Ltd. | Construction | 2008 |
| A Block Lakeside Apartments RTM Company Limited | Households | 2025 |
| A D R Wealth Management Limited | Administrative & support | 2006 |
| A D Willsher Machinery Limited | Administrative & support | 2012 |
| A Dixon Consulting Limited | Professional & scientific | 2018 |
| A F Global Football Limited | Education | 2025 |
| A Gambardella Limited | Real estate | 1958 |
| A Glaze Limited | Manufacturing | 2005 |
| A W Gregory & Company Limited | Extraterritorial | 2005 |
| A&K Ltd | Real estate | 2026 |
| A&M Developments Limited | Construction | 2018 |
| A&M Ecology Ltd | Professional & scientific | 2026 |
| A&N Ventures Limited | Hospitality | 2016 |
| A'S Cleaning Maids (Kent) Ltd | Administrative & support | 2011 |
| A-Tec International Limited | Wholesale & retail | 1998 |
| A. N. Waters Limited | Agriculture & fishing | 1977 |
| A.W.Thomson & SON Limited | Professional & scientific | 2013 |
| A1 UP and Over Garage Doors Limited | Construction | 2002 |
| A1MXR Limited | Real estate | 2013 |
| A2D Architecture Limited | Professional & scientific | 2005 |
| AA Digital Limited | Professional & scientific | 2019 |
| AA F&B Group Ltd | Hospitality | 2023 |
| AA Services (Shoreham) Limited | Administrative & support | 2019 |
| Aaaei Construction Ltd | Construction | 2014 |
| Aardvark Accounting Services Limited | Professional & scientific | 2008 |
| Aaruworks Ltd | Information & communication | 2025 |
| AB Agaci Flooring Ltd | Construction | 2022 |
| AB Stan’S Heating Limited | Construction | 2025 |
| Abacus 360 Limited | Professional & scientific | 2023 |
| Abacus K9 Group Limited | Administrative & support | 2023 |
| Abacus Security Services Limited | Administrative & support | 2016 |
| Abaleth Limited | Professional & scientific | 2012 |
| Abcl Review Limited | Professional & scientific | 2022 |
| ABJ Trading LLP | | 2012 |
| ABL Property Group Ltd | Real estate | 2019 |
| ABM Avon Limited | Extraterritorial | 2008 |
| ABM Colne Limited | Extraterritorial | 2009 |
| Abmed Medical Technology Group Ltd | Manufacturing | 2025 |
| Abmed Medical Technology Ltd | Manufacturing | 2024 |
| Abstruct Consulting Limited | Professional & scientific | 2015 |
| Abstruct LLP | | 2012 |
| ABY Properties Limited | Administrative & support | 2019 |
| AC Owners Club Limited | Other services | 1955 |
| Academy Consulting Solutions Limited | Professional & scientific | 2001 |
| Academy Consulting Solutions Trustee Limited | Extraterritorial | 2020 |
| Access by DM Ltd | Construction | 2015 |
| Acclaim Building Services (Kent) Limited | Construction | 2009 |
| Accounts Computers Limited | Information & communication | 2001 |
| Accurate Bookkeeping Company Limited | Professional & scientific | 2003 |
| Accurate Cooling Services Limited | Construction | 2001 |
| Accurate Landscaping Limited | Administrative & support | 2018 |
| Ace Contractors Ltd | Construction | 2010 |
| ACL Impact Limited | Professional & scientific | 2019 |
| ACM Media Limited | Wholesale & retail | 2024 |
| Acodemics Ltd | Information & communication | 2024 |
| Acorn Estates (Newmarket) Limited | Real estate | 2005 |
| Acoustic Group Limited | Wholesale & retail | 1997 |
| Acritudo Industries Limited | Manufacturing | 2019 |
| ACS Exteriors Ltd | Construction | 2011 |
| ACTIV8 (UK) Ltd | Extraterritorial | 2014 |
| Activeplay Motion Ltd | Education | 2026 |
| Activizeuk Ltd | Wholesale & retail | 2024 |
| Actuari Ltd | Professional & scientific | 2019 |
| Actuate UK Limited | Other services | 2020 |
| AD Landscapes Ltd | Administrative & support | 2002 |
| Adaa Auto Limited | Wholesale & retail | 2025 |
| Adalet Ltd | Hospitality | 2025 |
| Adam Blackman Ltd | Wholesale & retail | 2008 |
| Adamas Fides Limited | Professional & scientific | 2026 |
| Adaquo Limited | Wholesale & retail | 2017 |
| Adasch Ltd | Professional & scientific | 2018 |
| ADE Property Construction Limited | Construction | 2017 |
| Adelie Limited | Information & communication | 2026 |
| Adept Carpentry & Building Services Ltd | Construction | 2011 |
| ADG Sevenoaks Limited | Wholesale & retail | 2024 |
| Adlec Installations Limited | Construction | 1985 |
| Adlersson Ltd | Wholesale & retail | 2017 |
| ADM Real Estate Limited | Real estate | 2018 |
| Adprotection Limited | Construction | 1986 |
| Adreusum Limited | Information & communication | 2020 |
| Adrian Clarke Photography Ltd | Administrative & support | 2017 |
| ADS Waste Management Limited | Water & waste | 2026 |
| Advanced Building Compliance Plus Ltd | Construction | 2026 |
| Advanced Factors Ltd. | Wholesale & retail | 2009 |
| Advanced Scaffolding Access Ltd | Construction | 2023 |
| Advancete Limited | Professional & scientific | 2016 |