| AFP Consult Limited | Construction | 2025 |
| AFP Trans Services Ltd | Transport & logistics | 2023 |
| Afra Constructions Ltd | Construction | 2020 |
| Africa Global Logistics UK Limited | Transport & logistics | 1994 |
| African AI Trainer Network Ltd | Information & communication | 2026 |
| Afrihaul Transport & Logistics Ltd | Transport & logistics | 2026 |
| AG & JG Consulting Limited | Professional & scientific | 2018 |
| AG & JG Estates Limited | Real estate | 2015 |
| AG & Sons Solutions Limited | Transport & logistics | 2017 |
| AG Business Limited | Transport & logistics | 2025 |
| AG Infoconnect Limited | Information & communication | 2017 |
| AG Paving (Anglia) Ltd | Construction | 2014 |
| AGA Haulage Ltd | Transport & logistics | 2021 |
| Against Ordinary Limited | Professional & scientific | 2023 |
| Agame Audio Limited | Arts & recreation | 2023 |
| Agarwood Eco Capital Ltd | Agriculture & fishing | 2025 |
| AGB Builders (Felixstowe) Limited | Construction | 2013 |
| Agency Ventures Ltd | Real estate | 2024 |
| AGENCY72 Limited | Real estate | 2018 |
| Agentiv-X Limited | Information & communication | 2025 |
| Ageo Trans Ltd | Transport & logistics | 2018 |
| Aggar Consulting Limited | Extraterritorial | 2018 |
| Aggregate Supply Line Ltd | Wholesale & retail | 2025 |
| Agharan Limited | Wholesale & retail | 2023 |
| Aghoco 1438 Limited | Financial services | 2016 |
| Agiliq Limited | Information & communication | 2022 |
| Agmf Limited | Financial services | 2022 |
| Agnd Sports Management Limited | Professional & scientific | 2021 |
| Agnew Consultants Limited | Professional & scientific | 2023 |
| Agora Limited | Manufacturing | 2020 |
| AGR Consultants (Smc-Private) Limited | Professional & scientific | 2025 |
| Agri Machinery Ltd | Wholesale & retail | 2022 |
| Agrihire Limited | Manufacturing | 1986 |
| Agrihose Ltd | Manufacturing | 2017 |
| Agrirenew Ltd | Manufacturing | 2026 |
| Agrosoft Ltd. | Agriculture & fishing | 1997 |
| AH Aggregates Limited | Wholesale & retail | 2026 |
| Ahbabu Alrahman Ltd | Education | 2024 |
| Ahenema Limited | Wholesale & retail | 2021 |
| AHP Wealth Management Limited | Financial services | 2006 |
| AHP25 Ltd | Arts & recreation | 2025 |
| Ahpp (Athlete Health Physiotherapy Performance) Ltd | Health & social care | 2020 |
| Ahpp Nutrition Ltd | Health & social care | 2024 |
| Ahura Motorsport Ltd | Manufacturing | 2026 |
| AI Media Corporation Ltd | Information & communication | 2025 |
| AI Valley Ltd | Administrative & support | 2024 |
| Ai&C Group Ltd | Information & communication | 2024 |
| Ai-Property Hub Ltd | Real estate | 2023 |
| Ai-Property Hub Rentals Limited | Real estate | 2023 |
| Aicleaner Ltd | Information & communication | 2025 |
| Aiglon Morzine Ltd | Real estate | 2009 |
| AIK IT Solutions Limited | Information & communication | 2020 |
| AIM Fresh Resourcing Partners Ltd | Administrative & support | 2024 |
| AIM Properties (Suffolk) Ltd | Real estate | 2024 |
| Aimk Engineering Ltd | Construction | 2024 |
| Ainas Kitchen Ltd | Wholesale & retail | 2020 |
| Aingeniar Limited | Information & communication | 2026 |
| Air Transport Management Limited | Transport & logistics | 1995 |
| Aira Healthcare Limited | Health & social care | 2025 |
| Airaog Ltd | Wholesale & retail | 2018 |
| Airborne Events Limited | Arts & recreation | 2021 |
| Airborne Fit Limited | Arts & recreation | 2017 |
| Airborne Performance Limited | Arts & recreation | 2021 |
| Airidas Co Ltd | Transport & logistics | 2020 |
| Airspeed Tyre and Exhaust Limited | Wholesale & retail | 1985 |
| Aisling Homes Limited | Construction | 1996 |
| AIT Testing Ltd | Information & communication | 2025 |
| AJ Connect Ltd | Administrative & support | 2020 |
| AJ Florin Limited | Other services | 2018 |
| AJ Graphics Designing Limited | Professional & scientific | 2025 |
| AJ Logistic Services Limited | Transport & logistics | 2021 |
| AJ Mobility & Training Services Limited | Transport & logistics | 2017 |
| AJ Radiology Ltd | Health & social care | 2010 |
| AJ Rock Ltd | Transport & logistics | 2026 |
| AJ Senior Wealth Management Ltd | Financial services | 2010 |
| Ajadine Ltd | Arts & recreation | 2023 |
| Ajay & Tushar Properties Limited | Real estate | 2022 |
| Ajay and Jade Ltd | Wholesale & retail | 2023 |
| Ajay K Day Ltd | Administrative & support | 2025 |
| AJB Marketing Ltd | Professional & scientific | 2024 |
| AJC Listers Limited | Hospitality | 2023 |
| AJH Design and Build Ltd | Construction | 2026 |
| AJH Performance Services Ltd | Arts & recreation | 2023 |
| AJH Technology Limited | Information & communication | 2024 |
| Ajhc Limited | Professional & scientific | 2018 |
| AJJ Distributions Holdings Ltd | Wholesale & retail | 2026 |
| AJK Tri-Properties Limited | Real estate | 2012 |
| AJK.2 Ltd | Hospitality | 2025 |
| AJL Traders Ltd | Wholesale & retail | 2025 |
| Ajl-Teck Limited | Information & communication | 2017 |
| Ajminibus Ltd | Transport & logistics | 2019 |
| Ajoestates Ltd | Real estate | 2021 |
| Ajon.Aesthetics Limited | Health & social care | 2023 |
| AJP Handyman Services Ltd | Construction | 2026 |
| Ajrm Ltd | Arts & recreation | 2023 |
| AJS Emporium Ltd | Wholesale & retail | 2025 |
| AJW Maintenance Limited | Construction | 2026 |
| AJW Services Limited | Transport & logistics | 2022 |
| Ajwa Gifts & Garments Ltd | Wholesale & retail | 2017 |
| AK Signs & Vehicle Wrapping Ltd | Other services | 2018 |