| ALL Bedding Components Limited | Wholesale & retail | 2019 |
| ALL Hours Recovery 247 Ltd | Transport & logistics | 2025 |
| ALL Inclusive Business Solutions Limited | Administrative & support | 2020 |
| ALL Leads Ltd. | Construction | 2022 |
| ALL Level Scaffolding Ltd | Construction | 2026 |
| ALL MIX 24/7 Concrete Ltd | Construction | 2025 |
| ALL Over Shop Fronts & Shutters Ltd | Construction | 2024 |
| ALL QC Inspection Ltd | Professional & scientific | 2021 |
| ALL Round Construction Services Ltd | Construction | 2025 |
| ALL Saints Landmark Centre | Education | 2001 |
| ALL Saints Road BD Limited | Other services | 2024 |
| ALL Secured Ltd | Administrative & support | 2025 |
| ALL Sports Global Limited | Wholesale & retail | 2020 |
| ALL Star Doors and Windows Ltd | Wholesale & retail | 2024 |
| ALL Terrain Cycles Limited | Wholesale & retail | 2008 |
| Allan Mosh Limited | Information & communication | 2023 |
| Allanfield Projects Limited | Real estate | 2016 |
| Allclear Crushing Contractors Ltd | Water & waste | 2017 |
| Allclear Demolition Ltd | Construction | 2017 |
| Allclear Demolition Services Limited | Construction | 2024 |
| Allclear Recycling Limited | Water & waste | 2025 |
| Allclear Results Ltd | Arts & recreation | 2025 |
| Allclear Site Services Limited | Construction | 2013 |
| Alleenas Ltd | Wholesale & retail | 2022 |
| Allerton Arts Ltd | Arts & recreation | 2025 |
| Allerton Cafe Ltd | Hospitality | 2023 |
| Allerton Hill (BH) Limited | Real estate | 2003 |
| Allerton Hill (CB) Limited | Real estate | 2003 |
| Allerton Hill (CY) Limited | Real estate | 2003 |
| Allerton Interiors Ltd | Manufacturing | 2022 |
| Allerton Mini Market (Bradford) Ltd | Wholesale & retail | 2023 |
| Allerton Mini Market BD Ltd | Wholesale & retail | 2024 |
| Allerton Pharm Ltd | Wholesale & retail | 2018 |
| Allerton PO Ltd | Transport & logistics | 2025 |
| Allerton Precinct Ltd | Wholesale & retail | 2020 |
| Allerton Residences Ltd | Real estate | 2022 |
| Allerton School of Motoring Limited | Education | 2025 |
| Allerton Steak House & Pizza Bar Ltd | Hospitality | 2025 |
| Allerton Store Limited | Wholesale & retail | 2024 |
| Allertonflowers Limited | Wholesale & retail | 2025 |
| Alleynaglyne Ltd | Health & social care | 2025 |
| Alliance & Co. Professional Services Limited | Professional & scientific | 2011 |
| Alliance (Yorkshire) Ltd | Administrative & support | 2020 |
| Alliance Cargo Logistics Limited | Wholesale & retail | 2022 |
| Alliance Education Limited | Education | 2017 |
| Alliance Forecourt Ltd | Wholesale & retail | 2023 |
| Alliance Properties (Yorkshire) Ltd | Real estate | 2023 |
| Alliance Property Holdings Limited | Wholesale & retail | 1967 |
| Alliance Tech Ltd | Administrative & support | 2018 |
| Allied Nova Limited | Real estate | 2024 |
| Alliedchemi Ltd | Wholesale & retail | 2026 |
| Allin Investments Ltd | Real estate | 2025 |
| Allmart Ltd | Wholesale & retail | 2025 |
| Allover Transport Ltd | Transport & logistics | 2025 |
| Allover Vehicle Recovery Ltd | Wholesale & retail | 2023 |
| Alloy Revolution Ltd | Professional & scientific | 2025 |
| Allpets & the Bradford Birdman Ltd | Wholesale & retail | 2018 |
| Allpress Electrical Services Limited | Construction | 2024 |
| Allsorts Discounts Ltd | Wholesale & retail | 2013 |
| Allsports Superstore Ltd | Wholesale & retail | 2024 |
| Allstar Media Management Ltd | Information & communication | 2024 |
| Allthingscakeyy Ltd | Wholesale & retail | 2025 |
| Ally Doors Limited | Manufacturing | 2014 |
| ALM Accountax Ltd | Professional & scientific | 2017 |
| Almalia Limited | Financial services | 2017 |
| Almansour Academy CIC | Education | 2022 |
| Almarkaz Publishing Limited | Information & communication | 2017 |
| Almarkaz UL Islami Ltd | Health & social care | 2013 |
| Almas Beauty Salon Ltd | Other services | 2019 |
| Almas Care Services Ltd | Health & social care | 2025 |
| Almk Ltd | Manufacturing | 2025 |
| Almondbury Garage Limited | Extraterritorial | 1965 |
| Almurad D.I.Y. (Bradford) Ltd | Wholesale & retail | 1997 |
| Almustafa Madni Hajj & Umrah Services Limited | Administrative & support | 2005 |
| ALN Enterprise Limited | Real estate | 2022 |
| ALN Training and Security Services Ltd | Administrative & support | 2020 |
| Alodis (Consulting) Limited | Professional & scientific | 2018 |
| ALP Projects & Coatings Ltd | Construction | 2025 |
| Alpha Assured Leasing Ltd | Real estate | 2025 |
| Alpha Bravo Security Ltd | Financial services | 2023 |
| Alpha Community Empowerment C.I.C. | Education | 2022 |
| Alpha General Ltd | Wholesale & retail | 2016 |
| Alpha GOL UK Ltd | Wholesale & retail | 2024 |
| Alpha Green Energy Ltd | Professional & scientific | 2024 |
| Alpha Home Enterprise Limited | Wholesale & retail | 2021 |
| Alpha Hydra Ltd | Other services | 2025 |
| Alpha Instrumatics Holding Company Limited | Professional & scientific | 2018 |
| Alpha Language Services Ltd | Professional & scientific | 2011 |
| Alpha Laser Clinic Limited | Health & social care | 2021 |
| Alpha Motor Club Limited | Wholesale & retail | 2023 |
| Alpha Nova Security Ltd | Construction | 2025 |
| Alpha Omega Compliance Ltd | Professional & scientific | 2025 |
| Alpha Reports Limited | Health & social care | 2009 |
| Alpha Scraps Buyers Ltd | Water & waste | 2026 |
| Alpha Sealants Yorkshire Ltd | Construction | 2025 |
| Alpha Social Care Ltd | Health & social care | 2022 |
| Alpha Social Media Marketing Ltd | Professional & scientific | 2025 |
| Alpha Star Transport Ltd | Transport & logistics | 2024 |
| Alpha UK Investments Limited | Real estate | 2022 |
| Alpha Zulu Services Limited | Other services | 2017 |