| 1-4 the Close Park Road Ltd | Extraterritorial | 2021 |
| 11 Gabriel Street RTM Company Limited | Households | 2024 |
| 12627147 Ltd | Administrative & support | 2020 |
| 14 Jefferson Avenue Freehold Limited | Households | 2020 |
| 1ST Call Maintenance Limited | Administrative & support | 2017 |
| 2 Belle VUE Apartments Ltd | Real estate | 2022 |
| 2 FD Properties Limited | Real estate | 2024 |
| 22 Woodland Road (Kenilworth) Management Company Limited | Households | 2003 |
| 25, Prince of Wales Road (1984) Limited | Real estate | 1984 |
| 2600 Limited | Professional & scientific | 2021 |
| 36CHA Limited | Real estate | 2018 |
| 3BIT Consulting Ltd | Information & communication | 2020 |
| 3DPRINTUK Limited | Manufacturing | 2011 |
| 4 Rail Limited | Construction | 2017 |
| 4 Roads Limited | Information & communication | 2012 |
| 57 Highbury Park Freehold Limited | Real estate | 2016 |
| 734 Productions Ltd | Arts & recreation | 2022 |
| 9 of Hearts Ltd | Administrative & support | 2023 |
| 9 School Lane / Pepper Lane Flat 4 Freehold Management Company Limited | Households | 2007 |
| A and C Building Services ( Midlands ) Limited | Construction | 2013 |
| A F I C Limited | Financial services | 2024 |
| A Fletcher & SON | | 2005 |
| A K Independent Speech & Language Therapy Services Ltd | Health & social care | 2017 |
| A R Smith & SON Kenilworth Limited | Construction | 2013 |
| A World of Ceramics Limited | Construction | 2025 |
| A-Z Management Solutions Limited | Hospitality | 2009 |
| A. Gandhi Ltd | Professional & scientific | 2023 |
| A.C. Electrics Contractors Ltd | Construction | 2018 |
| A.J. Davidson Limited | Information & communication | 2000 |
| A.M. Associates Accy Ltd | Professional & scientific | 2002 |
| A.M.Prototype Services Limited | Manufacturing | 2010 |
| A.S Accessories Company Limited | Wholesale & retail | 2018 |
| A@A Consult Ltd | Information & communication | 2012 |
| AAC Property Investment Ltd | Real estate | 2026 |
| Abazed Trading Co., Ltd | Administrative & support | 2025 |
| Abbey Park Management Limited | Real estate | 2026 |
| Abbotsfield Investments Limited | Financial services | 2020 |
| Abeon Limited | Information & communication | 2002 |
| Aberdonia International Ltd | Manufacturing | 2024 |
| Abstract Design Creators Limited | Information & communication | 1988 |
| Ace Day Events Limited | Other services | 2006 |
| Acehart Limited | Extraterritorial | 1974 |
| Achieve CBT Limited | Health & social care | 2019 |
| Acorn Living Limited | Wholesale & retail | 2020 |
| Acorus Rural Property Services Limited | Real estate | 2002 |
| ACT NOW Team Development Ltd | Professional & scientific | 2010 |
| Acumen Business Systems Limited | Information & communication | 2000 |
| AD Mart Ltd | Wholesale & retail | 2025 |
| ADA Digital Marketing Ltd | Information & communication | 2020 |
| Adalchemy Limited | Professional & scientific | 2025 |
| Adam Williams PSC Ltd | Information & communication | 2018 |
| Adams ROW Capital LLP | | 2011 |
| Adapt & Grow Ltd | Professional & scientific | 2020 |
| Adaptable Game Design Ltd | Professional & scientific | 2026 |
| ADC Marketing Ltd | Professional & scientific | 2024 |
| ADD Ningbo Ltd | Administrative & support | 2014 |
| Addato Limited | Professional & scientific | 2011 |
| Addington Ball Recruitment Limited | Administrative & support | 2011 |
| Addlington-West Legal Ltd | Professional & scientific | 2024 |
| Addpower Sprays Limited | Wholesale & retail | 2004 |
| Addrate Limited | Extraterritorial | 2019 |
| Adecor Co., Ltd | Extraterritorial | 2019 |
| Adfluex Ltd | Information & communication | 2024 |
| Advance Coaching Solutions Ltd | Professional & scientific | 2010 |
| Advanced Aluminium Systems Limited | Manufacturing | 2021 |
| Advanced Construction Warwickshire Limited | Construction | 2025 |
| Advanced Solutions Group Limited | Extraterritorial | 2015 |
| Advanced Veterinary Dermatology Ltd | Professional & scientific | 2025 |
| Adventumtraining Ltd | Professional & scientific | 2014 |
| ADY Coop Limited | Construction | 2007 |
| Aegis Football Advisory Group Ltd | Information & communication | 2026 |
| AEM Partners Limited | Professional & scientific | 2023 |
| Aerodynamic Software Limited | Information & communication | 2013 |
| Aerospace Capability Project Limited | Transport & logistics | 2015 |
| Aerosync Limited | Professional & scientific | 2022 |
| Aesthetics Event Staff Ltd. | Other services | 2012 |
| Agco Funding Company | Professional & scientific | 2004 |
| Agco Holdings Limited | Professional & scientific | 2025 |
| Agco International Limited | Professional & scientific | 1989 |
| Agco Limited | Manufacturing | 1952 |
| Agco Manufacturing Limited | Professional & scientific | 1956 |
| Agco Services Limited | Professional & scientific | 1952 |
| AGENTIC1 Limited | Information & communication | 2025 |
| Aggserve Ltd | Mining & quarrying | 2020 |
| Agile Software Engineering Limited | Information & communication | 2016 |
| Agrikomp Limited | Manufacturing | 2010 |
| AH 812 Limited | Financial services | 2016 |
| Ahead Psychology Limited | Health & social care | 2017 |
| AHS Consultancy Limited | Education | 2006 |
| AI Groundworks Ltd | Construction | 2026 |
| AI YI Trade Co., Limited | Extraterritorial | 2019 |
| Airvolt Technologies Ltd | Information & communication | 2024 |
| AJB Technical Consultancy Ltd | Professional & scientific | 2013 |
| Akinova Holdings Limited | Professional & scientific | 2016 |
| Aksgill Ltd | Health & social care | 2026 |
| Aktion Toys Ltd | Wholesale & retail | 2016 |
| Akuma Sports Ltd. | Manufacturing | 2008 |
| Akuma TEX Ltd | Administrative & support | 2005 |
| Albion Street Kitchen Ltd | Hospitality | 2023 |
| Alderminster Group Limited | Financial services | 2015 |