| ALL in a Click Ltd | Wholesale & retail | 2023 |
| ALL ME Limited | Wholesale & retail | 2019 |
| ALL One Stop Ltd | Wholesale & retail | 2021 |
| ALL Sports Leisure Limited | Hospitality | 2023 |
| ALL Teed UP Limited | Arts & recreation | 2005 |
| ALL Trade 365 Limited | Wholesale & retail | 2021 |
| All-Inspired Ltd | Education | 2024 |
| ALL4MATS Limited | Wholesale & retail | 2011 |
| Allan Greenwood Limited | Administrative & support | 2017 |
| Allcar Tyres & Servicing Limited | Wholesale & retail | 2019 |
| Allegiance Chemicals Ltd | Manufacturing | 2022 |
| Allegiance Solutions Limited | Wholesale & retail | 2024 |
| Allegro Delight Limited | Hospitality | 2024 |
| Allen Property Services Limited | Construction | 2020 |
| Allen Windows Yorkshire Ltd | Construction | 2022 |
| Allentra Group Limited | Wholesale & retail | 2025 |
| Allette Ltd | Wholesale & retail | 2023 |
| Allgas Plumbing & Heating Limited | Construction | 2008 |
| Allgood Farm Ltd | Agriculture & fishing | 2023 |
| Alliance Fabrics Limited | Manufacturing | 2019 |
| Alliance Parts Ltd | Wholesale & retail | 2025 |
| Alliance Transport (PV T) Ltd | Transport & logistics | 2020 |
| Alliot Technologies Limited | Information & communication | 2017 |
| Alloy Repair Centre Rochdale Ltd | Wholesale & retail | 2024 |
| Allsop Holdings Limited | Manufacturing | 2004 |
| Allsorts of Fings Ltd | Wholesale & retail | 2021 |
| Allstar Deliveries Ltd | Transport & logistics | 2018 |
| Allure Beauty Rooms Ltd | Other services | 2024 |
| Ally Media Ltd | Information & communication | 2019 |
| Alma Cars Ltd | Wholesale & retail | 2018 |
| Alma Marble Company Limited | Manufacturing | 2011 |
| ALMA101 C.I.C. | Education | 2019 |
| Almaysu Limited | Wholesale & retail | 2022 |
| Almila Ltd | Wholesale & retail | 2022 |
| Almo Accountants Ltd | Professional & scientific | 2019 |
| Almo Financial Services Ltd | Financial services | 2020 |
| Almo Financials Limited | Professional & scientific | 2010 |
| Almo Healthcare Limited | Administrative & support | 2019 |
| Almo Spare Parts & Tyres Ltd | Wholesale & retail | 2018 |
| Almoen Ltd | Wholesale & retail | 2019 |
| Almond Boutique Ltd | Wholesale & retail | 2025 |
| Almondbury Community Cafe | Professional & scientific | 2002 |
| Almondbury Cricket Club Community Interest Company | Education | 2024 |
| Almondbury Doctors Limited | Health & social care | 2015 |
| Almondbury Liberal Club Co Ltd | Administrative & support | 1896 |
| Almondbury Spinal Health Limited | Health & social care | 2008 |
| Alms Property Limited | Real estate | 2013 |
| Aloe Earrings Ltd | Wholesale & retail | 2020 |
| Alojee Limited | Wholesale & retail | 2021 |
| Alonsos Ltd | Hospitality | 2024 |
| Alpaca Trading Ltd | Wholesale & retail | 2020 |
| Alpha a Logistics Ltd | Administrative & support | 2026 |
| Alpha Aesthetic Clinic Ltd | Health & social care | 2022 |
| Alpha Concrete Pumping Ltd | Construction | 2023 |
| Alpha Connections Ltd | Wholesale & retail | 2020 |
| Alpha Force Security Limited | Administrative & support | 2022 |
| Alpha Investment & Consultancy Limited | Real estate | 2023 |
| Alpha Marking Services Limited | Construction | 2001 |
| Alpha MS Group Limited | Professional & scientific | 2020 |
| Alpha Property (Yorkshire) Ltd | Real estate | 2024 |
| Alpha-Crete Ltd | Manufacturing | 2020 |
| Alphaaxis Trading Ltd | Wholesale & retail | 2026 |
| Alphatalent Resources Ltd | Information & communication | 2025 |
| Alpine Global Products Ltd | Wholesale & retail | 2023 |
| ALSA23 Limited | Hospitality | 2025 |
| Alshadida Medical Services Limited | Health & social care | 2020 |
| Alsous Properties Ltd | Real estate | 2024 |
| Alstars Trading Ltd | Wholesale & retail | 2023 |
| Alsuna Limited | Wholesale & retail | 2009 |
| Alta Roofing Ltd | Construction | 2024 |
| Altaf & Sons Limited | Transport & logistics | 2019 |
| Alteck Limited | Wholesale & retail | 2025 |
| Altenwood Properties Ltd | Real estate | 2026 |
| Alternative Choices Limited | Professional & scientific | 2009 |
| Altivora Group Ltd | Wholesale & retail | 2026 |
| Alto Scaffolding Ltd | Construction | 2026 |
| Altruistic Solutions Ltd | Wholesale & retail | 2021 |
| Altum Properties Limited | Real estate | 2020 |
| Altum Properties Management Limited | Real estate | 2020 |
| Altum Trading Ltd | Wholesale & retail | 2021 |
| Alu.R Limited | Other services | 2010 |
| Aluminium & Glass Installations (Northern) Limited | Construction | 2015 |
| ALV Enterprise Ltd | Real estate | 2021 |
| ALVEEVA365 Ltd | Transport & logistics | 2025 |
| Alvo Interiors Ltd | Administrative & support | 2023 |
| Always Here Care Limited | Health & social care | 2024 |
| Always Talent Solutions Limited | Administrative & support | 2025 |
| Always Unique Ltd | Wholesale & retail | 2022 |
| Alyana London Ltd | Construction | 2023 |
| Alyn Lesley Properties Limited | Real estate | 2026 |
| AM Consultants Ltd | Information & communication | 2021 |
| AM Digital Systems Ltd | Information & communication | 2025 |
| AM Groundworks and Construction Solutions Limited | Construction | 2012 |
| AM Halcyon Ltd | Real estate | 2025 |
| AM Mehin Ltd | Health & social care | 2025 |
| AM Modders Ltd | Wholesale & retail | 2025 |
| AM Prospects Ltd | Education | 2022 |
| AM Sykes Transport Ltd | Transport & logistics | 2013 |
| AM Talent Management Ltd | Administrative & support | 2018 |
| AM Textile Engineering Limited | Manufacturing | 2015 |