| Abousetta Ltd | Wholesale & retail | 2023 |
| About Town Business Services Limited | Administrative & support | 2010 |
| About Town Carriages Limited | Transport & logistics | 2010 |
| Above Average Clothing Limited | Wholesale & retail | 2025 |
| Above Limits Ltd | Health & social care | 2021 |
| Above Mobile Limited | Information & communication | 2007 |
| Abpremovals Ltd | Wholesale & retail | 2019 |
| Abpropertymanagement Limited | Real estate | 2024 |
| ABR Granite & Quartz Ltd | Construction | 2025 |
| ABR Holdings Ltd | Real estate | 2015 |
| ABR Properties Manchester Limited | Real estate | 2026 |
| ABR Trends Limited | Wholesale & retail | 2024 |
| Abraham Fold Management Company Limited | Real estate | 2025 |
| Abraham Moss Warriors at the Heart of the Community C.I.C. | Education | 2020 |
| Abraham UK Store Ltd | Wholesale & retail | 2023 |
| Abraj Al-Sharq Al-Masriya for Engineering Consultancy Ltd | Wholesale & retail | 2026 |
| Abraj for Export Ltd | Wholesale & retail | 2025 |
| Abraj Marmul International for Trading Ltd | Wholesale & retail | 2025 |
| Abraj Properties Ltd | Real estate | 2022 |
| Abraj Real State and Development Ltd | Construction | 2025 |
| Abraj Shiza Trading Company Ltd | Wholesale & retail | 2026 |
| Abraj Sohar Al-Haditha Ltd | Wholesale & retail | 2025 |
| Abram & Co. Ltd | Professional & scientific | 2017 |
| Abrasco (MCR) Limited | Wholesale & retail | 2016 |
| Abrendesto for Wholesale and Retail Trade Ltd | Wholesale & retail | 2026 |
| Abreuz Roofers Limited | Construction | 2025 |
| Abridge Finance Ltd | Financial services | 2020 |
| Abronn Medical Units UK Limited | Manufacturing | 2021 |
| Abros Services Limited | Real estate | 2023 |
| Abruzzo XO Limited | Hospitality | 2020 |
| Abrx Pharma Limited | Wholesale & retail | 2018 |
| ABS Cafes Ltd | Hospitality | 2024 |
| ABS Management Consultancy Ltd | Professional & scientific | 2017 |
| ABS Medical Practice Limited | Health & social care | 2022 |
| ABS MOT Station Ltd | Wholesale & retail | 2020 |
| ABS Payroll Ltd | Professional & scientific | 2019 |
| ABS Property Dealers Limited | Real estate | 2019 |
| Absam Limited | Health & social care | 2019 |
| Absamon Limited | Financial services | 2013 |
| Absolute Balustrades Ltd | Construction | 2024 |
| Absolute Belting Solutions Ltd | Wholesale & retail | 2016 |
| Absolute Car Group Ltd | Wholesale & retail | 2021 |
| Absolute Construction Ltd | Construction | 2021 |
| Absolute Dental Prestwich Ltd | Health & social care | 2023 |
| Absolute Digital Holdings LLP | | 2023 |
| Absolute Digital Solutions Limited | Administrative & support | 2001 |
| Absolute Dots Limited | Arts & recreation | 2023 |
| Absolute Formwork Hire and Supplies Limited | Administrative & support | 2024 |
| Absolute Formwork Ltd | Construction | 2012 |
| Absolute GAS Solutions Limited | Construction | 2018 |
| Absolute Hair Ltd | Other services | 2008 |
| Absolute Intelligence Call Centre Ltd | Information & communication | 2015 |
| Absolute Medical International Ltd | Wholesale & retail | 2018 |
| Absolute Outfits Limited | Wholesale & retail | 2015 |
| Absolute Outsourcing Limited | Administrative & support | 2019 |
| Absolute Pro Ltd | Professional & scientific | 2017 |
| Absolute Refurbishments Ltd | Construction | 2025 |
| Absolute Stillness Limited | Information & communication | 2024 |
| Absolute Systems Ltd | Administrative & support | 2008 |
| Absolute Tax Ltd | Administrative & support | 2020 |
| Absolute Zero Capital Limited | Information & communication | 2026 |
| Absolutely Group Ltd | Administrative & support | 2023 |
| Absolutely Halal (UK) Limited | Information & communication | 2018 |
| Abson Office Seating Limited | Manufacturing | 2012 |
| Absorb Employment Law Consultants Limited | Professional & scientific | 2016 |
| Abstract Devx Ltd | Information & communication | 2020 |
| Abstract Legal Holdings Limited | Extraterritorial | 2004 |
| Abstract Manchester Limited | Professional & scientific | 2025 |
| Abstract Pools Ltd | Construction | 2021 |
| Abstract Property Development Ltd | Real estate | 2025 |
| ABT Buildings Group Ltd | Construction | 2025 |
| ABT Coaching Ltd | Education | 2023 |
| ABT Holding Ltd | Financial services | 2024 |
| Abts Consultancy Ltd | Information & communication | 2021 |
| Abtu Naizuud Ltd | Hospitality | 2019 |
| ABU Bakor Sadiq Trading Company Ltd | Wholesale & retail | 2025 |
| ABU Cleaning Services Ltd | Administrative & support | 2020 |
| ABU Derhem for Trading and Investment Ltd | Wholesale & retail | 2026 |
| ABU Ghassan Ltd | Manufacturing | 2021 |
| ABU Mazen Mini Market Ltd | Wholesale & retail | 2021 |
| ABU Mazen Trading Ltd | Manufacturing | 2021 |
| ABU Sagan International UK Ltd | Other services | 2026 |
| ABU Sulaiman for Trading Ltd | Wholesale & retail | 2026 |
| ABU Vision Limited | Health & social care | 2019 |
| ABU WAD Hamad Ltd | Other services | 2024 |
| ABU ZAR Limited | Wholesale & retail | 2017 |
| Abubakar Enterprises Ltd | Wholesale & retail | 2024 |
| Abudaud Services Ltd | Other services | 2020 |
| Abughabush for Trading Ltd | Construction | 2025 |
| Abukar Ltd | Transport & logistics | 2026 |
| Abukha Ltd | Real estate | 2024 |
| Abumor Ltd | Wholesale & retail | 2025 |
| Abundance Estate 777 Ltd | Extraterritorial | 2022 |
| Abundance Flow Ltd | Wholesale & retail | 2024 |
| Abundance Global Ltd | Information & communication | 2026 |
| Abundance Grace Care Services Ltd | Administrative & support | 2026 |
| Abundance Learning Ltd | Education | 2020 |
| Abundance Resources Ltd | Transport & logistics | 2025 |
| Abundancia Esoterics Ltd | Wholesale & retail | 2025 |
| Abundant Homes Ltd | Construction | 2021 |