| ALH Maintenance Services Limited | Construction | 2018 |
| Alham Enam Ltd | Wholesale & retail | 2025 |
| ALI and Umer Properties Ltd | Real estate | 2025 |
| ALI BWN Ltd | Wholesale & retail | 2025 |
| ALI Family Estates Ltd | Real estate | 2026 |
| ALI Farming Developments Ltd | Construction | 2019 |
| ALI Farming Ltd | Construction | 2020 |
| ALI Gibson Support Limited | Health & social care | 2017 |
| ALI JAF Ltd | Transport & logistics | 2015 |
| ALI Majeed Limited | Health & social care | 2008 |
| ALI N ALI Ltd | Professional & scientific | 2024 |
| ALI Property Management Ltd | Wholesale & retail | 2018 |
| ALI Rentals Ltd | Administrative & support | 2016 |
| Ali's Autoforge Ltd | Wholesale & retail | 2026 |
| Ali's Hair Central Ltd | Wholesale & retail | 2025 |
| Ali's Payment Sense Limited | Wholesale & retail | 2025 |
| Alia Point Ltd | Wholesale & retail | 2022 |
| Alias Media Ltd | Professional & scientific | 2016 |
| Aliba Limited | Real estate | 2025 |
| Alice & Erna Limited | Administrative & support | 2009 |
| Alice and Harry Limited | Wholesale & retail | 2022 |
| Alice Coulthard Limited | Arts & recreation | 2009 |
| Alicelyn Healthcare Ltd. | Health & social care | 2016 |
| Alicia Nang Designs Ltd | Other services | 2016 |
| Alick Watson,Limited | Construction | 1938 |
| Alidemo Ltd | Information & communication | 2025 |
| Alif 12 Limited | Hospitality | 2025 |
| Alif Group Limited | Real estate | 2015 |
| Align Building Control Ltd | Professional & scientific | 2010 |
| Align Group (UK) Ltd | Professional & scientific | 2010 |
| Aligned Healing Ltd | Wholesale & retail | 2025 |
| Alin's Estates Limited | Real estate | 2025 |
| Alinat Limited | Professional & scientific | 2010 |
| Alinmar Limited | Transport & logistics | 2016 |
| ALIOTH7 Consulting Limited | Professional & scientific | 2020 |
| Alipta Ltd | Wholesale & retail | 2018 |
| Alis Barber Ltd | Other services | 2020 |
| Alisha Music Limited | Information & communication | 2019 |
| Alison Heyes Consulting Ltd | Health & social care | 2015 |
| Alison Kane Limited | Professional & scientific | 2010 |
| Alison Law Solicitors LLP | | 2012 |
| Alison Ralston Consultancy Limited | Professional & scientific | 2019 |
| Alison Real Estate Limited | Construction | 2016 |
| Alissa Salls Limited | Arts & recreation | 2017 |
| Alive Landscapes Limited | Administrative & support | 2020 |
| Alizah Medical Associates Limited | Health & social care | 2014 |
| ALJ Consultants Ltd | Professional & scientific | 2025 |
| Aljabali Real Estate Limited | Real estate | 2022 |
| Aljack Ltd | Real estate | 2016 |
| Aljannah International Halal Store Limited | Wholesale & retail | 2024 |
| Aljaro Motors Limited | Wholesale & retail | 2025 |
| Aljawad Taxi Services Ltd | Transport & logistics | 2026 |
| Aljsuza Ltd | Health & social care | 2026 |
| Alju Services Ltd | Transport & logistics | 2026 |
| Alkadi Food and Drinks Limited | Wholesale & retail | 2025 |
| Alkatec Doors Limited | Manufacturing | 2025 |
| Alkeme Ltd | Manufacturing | 2025 |
| Alkozei Bargains Ltd | Wholesale & retail | 2021 |
| Alks Joinery Limited | Construction | 2021 |
| ALL About Annie Ltd | Wholesale & retail | 2023 |
| ALL About Joinery (Yorkshire) Ltd | Construction | 2021 |
| ALL Aspects Building and Maintenance Ltd | Construction | 2023 |
| ALL Days Scott Road Ltd | Wholesale & retail | 2023 |
| ALL Friends Community Hub Limited | Other services | 2015 |
| ALL Good Stuff Community Interest Company | Wholesale & retail | 2013 |
| ALL in Cars Limited | Wholesale & retail | 2017 |
| ALL in Consulting Ltd | Professional & scientific | 2023 |
| ALL in Properties Limited | Households | 2022 |
| ALL Metal Traders Limited | Wholesale & retail | 2024 |
| ALL Nations Legal Services Limited | Professional & scientific | 2016 |
| ALL Points Training Limited | Health & social care | 2012 |
| ALL Saints Sports Educational and Recreational Company Limited | Arts & recreation | 2004 |
| ALL Seasons Group Holdings Limited | Professional & scientific | 2020 |
| ALL Seasons Holidays Ltd | Hospitality | 2023 |
| ALL Seasons Interiors Limited | Construction | 2021 |
| ALL Seasons Property Developments Ltd | Real estate | 2019 |
| ALL Siam Limited | Hospitality | 2013 |
| ALL Star Building & Maintenance Ltd | Construction | 2014 |
| ALL Structures Ltd | Professional & scientific | 2021 |
| ALL the Cars Ltd | Wholesale & retail | 2025 |
| ALL the Citizens Limited | Information & communication | 2020 |
| ALL Things Bridge Limited | Professional & scientific | 2019 |
| ALL Things Golf Ltd | Wholesale & retail | 2017 |
| ALL Three Phases Limited | Arts & recreation | 2014 |
| ALL Urban Limited | Administrative & support | 2014 |
| ALL Work Considered Ltd | Construction | 2015 |
| ALL YOU Need IS Today Limited | Professional & scientific | 2014 |
| ALL Yours Beauty Limited | Other services | 2025 |
| All-Ways Property Repairs Ltd | Construction | 2021 |
| Allam Solutions Limited | Wholesale & retail | 2025 |
| Allan (Construction) Design and Build Limited | Construction | 2017 |
| Allan Stainrod Services Limited | Transport & logistics | 2007 |
| Allan Supercut Limited | Other services | 2020 |
| Allanson Construction Consultancy Ltd | Construction | 2018 |
| Allegory Communications Limited | Professional & scientific | 2012 |
| Allegro Legal Translations Ltd | Professional & scientific | 2011 |
| Allen & Barnfield Chemists Limited | Wholesale & retail | 1987 |
| Allen Upholstery Ltd | Manufacturing | 2017 |
| Allen, West and Foster Financial Services Limited | Financial services | 2018 |
| Allen, West and Foster Limited | Professional & scientific | 2017 |