| AYS Locums Limited | Professional & scientific | 2012 |
| Ayyar Living Ltd | Hospitality | 2019 |
| Ayyub Builders Ltd | Construction | 2023 |
| AYZ Properties Ltd | Real estate | 2023 |
| AYZ Retailing Limited | Wholesale & retail | 2021 |
| AZ Canopy Ltd | Manufacturing | 2024 |
| AZ Medics Ltd | Health & social care | 2009 |
| AZ Secure Tech Ltd | Administrative & support | 2025 |
| AZA Associates Payroll and Bookkeeping Ltd | Professional & scientific | 2016 |
| AZA Developers Ltd | Real estate | 2025 |
| AZA Pharm Limited | Health & social care | 2025 |
| Azahmed Holdings Ltd | Financial services | 2026 |
| Azam Kitchen & Grill Limited | Hospitality | 2024 |
| Azath Limited | Real estate | 2023 |
| Azdin Glazing Services Ltd | Construction | 2025 |
| Azdin Window Repairs Ltd | Construction | 2025 |
| Azefor ALI Properties Limited | Real estate | 2024 |
| Azera Cars Ltd | Other services | 2025 |
| Azetech Limited | Construction | 2018 |
| Azhar Locum Service Ltd | Administrative & support | 2024 |
| Azizrahmanenterprise Limited | Manufacturing | 2023 |
| Azmot and Nasrin Al-Barakah Ltd | Real estate | 2025 |
| Azobtera Ltd | Wholesale & retail | 2025 |
| Azoria Capital (2) Bidco Limited | Professional & scientific | 2023 |
| Azoria Capital (2) Limited | Professional & scientific | 2023 |
| AZS Cars Ltd | Wholesale & retail | 2024 |
| AZS Manchester Ltd | Wholesale & retail | 2026 |
| Aztec Fire & Security Ltd | Administrative & support | 2014 |
| Azuni Limited | Manufacturing | 1998 |
| Azura Holdings (UK) Limited | Administrative & support | 2019 |
| Azura Home Limited | Wholesale & retail | 2014 |
| Azura Properties (UK) Limited | Real estate | 2014 |
| Azura Soft Furnishings (UK) Limited | Manufacturing | 2006 |
| Azure Acquisitions Ltd | Real estate | 2024 |
| AZZ Tech MOT and Service Ltd | Wholesale & retail | 2024 |
| B & a Store Ltd | Wholesale & retail | 2025 |
| B & G Autotechs Limited | Wholesale & retail | 2017 |
| B & L Tree Services Limited | Administrative & support | 2020 |
| B & W Asset Management Limited | Extraterritorial | 2007 |
| B B Catering (Oldham) Limited | Hospitality | 2026 |
| B D Hughes Consultants Ltd | Professional & scientific | 2011 |
| B Denson Roofing Ltd | Construction | 2023 |
| B FOX Consulting Ltd | Professional & scientific | 2021 |
| B Home Property & Development Ltd | Real estate | 2020 |
| B K Hair Ltd | Professional & scientific | 2023 |
| B R Lettings & Management Ltd | Real estate | 2025 |
| B S Entwistle Electrical Contractors Limited | Construction | 1998 |
| B Wood Paving & Landscapes Ltd | Construction | 2021 |
| B&B Pharma Limited | Health & social care | 2018 |
| B. Clarke Painting & Decorating Contractors Ltd | Construction | 2021 |
| B. Conway (Mechanical Handling) Limited | Manufacturing | 1978 |
| B.A Scaffolding Ltd | Construction | 2025 |
| B.Conway (Tail Lifts) Limited | Manufacturing | 1984 |
| B.G Designer Ltd | Wholesale & retail | 2023 |
| B.H. Mobiles Limited | Wholesale & retail | 2003 |
| B.I.G Jumper Ltd | Agriculture & fishing | 2024 |
| B.I.G Rider Ltd | Agriculture & fishing | 2024 |
| B.J. Crowther Ltd | Construction | 1998 |
| B.M Cleaning Service Limited | Administrative & support | 2019 |
| B.S.T. Carriers Limited | Transport & logistics | 1978 |
| B.T. Properties Limited | Manufacturing | 1983 |
| B.T. Technical Systems Limited | Manufacturing | 1972 |
| B2B Networking Events Limited | Administrative & support | 2019 |
| Baabenew Ltd | Health & social care | 2024 |
| Baba's Local Ltd | Wholesale & retail | 2020 |
| Babs Consulting Ltd | Professional & scientific | 2025 |
| Baby Bear Play Cafe Ltd | Health & social care | 2025 |
| Baby Casts & Prints Ltd | Wholesale & retail | 2017 |
| Baby Mineral Limited | Manufacturing | 2018 |
| Baby Sensory Oldham and Saddleworth Ltd | Education | 2023 |
| Babyface Trading Ltd | Other services | 2025 |
| Babylon 5 Oldham Ltd | Hospitality | 2026 |
| Bachtalo Gardening Ltd | Other services | 2024 |
| Back to Health Chiropractic Care Limited | Health & social care | 2002 |
| Bacup Property and Plant Ltd | Administrative & support | 2019 |
| BAD Digital Dynamic Ltd | Wholesale & retail | 2024 |
| BAD Manners MCR Ltd | Hospitality | 2020 |
| Badar Estates Limited | Real estate | 2024 |
| Badger Enterprises Ltd | Information & communication | 2024 |
| Badshah Investments Ltd | Real estate | 2025 |
| Baggins Abodes Limited | Real estate | 2014 |
| Bahpullo's Kitchen Ltd | Hospitality | 2026 |
| Bainbridge Developments Limited | Construction | 2022 |
| Bajico Ltd | Professional & scientific | 2024 |
| Bajs Services Ltd | Administrative & support | 2017 |
| Bajwa Investments Ltd | Real estate | 2023 |
| Bake N Butty Ltd | Hospitality | 2025 |
| Baked Group Ltd | Professional & scientific | 2018 |
| Bakehouse Pizza Limited | Hospitality | 2024 |
| Baker Legacy Limited | Financial services | 2019 |
| Bakergg Holdings Limited | Real estate | 2025 |
| Bakergg Limited | Professional & scientific | 2015 |
| Bakersson International Ltd | Professional & scientific | 2025 |
| Bakersson Limited | Professional & scientific | 2011 |
| Bakewell Hill Ltd | Administrative & support | 2024 |
| Bakur Grill House Ltd | Hospitality | 2025 |
| Balaha Family Ltd | Health & social care | 2026 |
| Balance and Bloom Business Services Limited | Professional & scientific | 2026 |
| Balance Nutrition Limited | Wholesale & retail | 2025 |
| Balancely Ltd | Professional & scientific | 2026 |