| Asolmd Ltd | Construction | 2022 |
| Aspen Day Care Limited | Health & social care | 2025 |
| Asset Engineering Solutions Limited | Professional & scientific | 2026 |
| Astbury Motors Ltd | Wholesale & retail | 2025 |
| Astwood Carpentry Ltd | Construction | 2022 |
| AT Home With Woodford Limited | Extraterritorial | 2008 |
| AT5 Properties Limited | Real estate | 2020 |
| Atex Products Limited | Wholesale & retail | 1931 |
| Atlantic Link Consulting Limited | Wholesale & retail | 2018 |
| ATP Van Hire Limited | Other services | 2015 |
| Attune Holdings Ltd | Health & social care | 2020 |
| Audenham Limited | Extraterritorial | 2010 |
| Aura Nail Lounge Ltd | Other services | 2026 |
| Aurivas Acquisitions Limited | Wholesale & retail | 2002 |
| Auto Nexus 360 Ltd. | Wholesale & retail | 2021 |
| Auto Repairs & Mots Ltd | Wholesale & retail | 2018 |
| Auto Services (Midlands) Limited | Other services | 2021 |
| Auto Solutions West Midlands Ltd | Wholesale & retail | 2021 |
| Autoaid Assist Ltd | Financial services | 2025 |
| Automate-Us Ltd | Public administration | 2024 |
| Autoquad Limited | Professional & scientific | 1989 |
| Autotek Auto Electrics Ltd | Information & communication | 2026 |
| Avace Limited | Manufacturing | 2008 |
| Avace Living Limited | Real estate | 2021 |
| Avanti Fitted Kitchens Limited | Manufacturing | 1980 |
| Avanti Kitchens and Bedrooms Limited | Professional & scientific | 2020 |
| Avanti Kitchens Limited | Manufacturing | 2021 |
| Avanti West Midlands Limited | Financial services | 2014 |
| AVC Property Management Ltd | Real estate | 2024 |
| Avid Star Limited | Hospitality | 2025 |
| Avido Services Limited | Construction | 2024 |
| AVM PR Consultancy Limited | Extraterritorial | 2011 |
| Avon Motors (West Midlands) Ltd | Wholesale & retail | 2010 |
| AW Construction & Pipelines Ltd | Construction | 2019 |
| Away With Abbi Ltd | Administrative & support | 2020 |
| AWS Property Ltd | Real estate | 2019 |
| Axiom Implant and CAD CAM Laboratory Limited | Administrative & support | 2023 |
| Ayomide Properties Limited | Real estate | 2021 |
| AZI Property Ltd | Real estate | 2025 |
| Azonebook Limited | Wholesale & retail | 2023 |
| B & R (Worcestershire) Ltd | Transport & logistics | 2016 |
| B F Rumbold Limited | Professional & scientific | 2014 |
| B H Essentials Limited | Hospitality | 2024 |
| B J Matthews Properties Limited | Real estate | 1999 |
| B Searle Rugby Ltd | Arts & recreation | 2023 |
| B Sheldon Refinery Ltd | Financial services | 2026 |
| B&L Simmonds Properties Limited | Real estate | 2025 |
| B&M Housing Limited | Real estate | 2025 |
| B. Shakespeare & Company Limited | Wholesale & retail | 1975 |
| B.A.C Consulting Services Limited | Administrative & support | 2025 |
| B.E.S. Controls Limited | Manufacturing | 1984 |
| B.G. Developments (Holdings) Limited | Administrative & support | 2008 |
| B.G. Developments Limited | Manufacturing | 1983 |
| B.S. Burner Services Limited | Construction | 1988 |
| B.S. Midlands Limited | Other services | 2011 |
| B4U Money Limited | Financial services | 2021 |
| Babydonut Limited | Hospitality | 2026 |
| BAC 2 New Ltd | Construction | 2025 |
| BAC Ventures Limited | Real estate | 2022 |
| BAD Chunk Limited | Extraterritorial | 2006 |
| Badger Drive Limited | Transport & logistics | 2014 |
| Bagotools Limited | Professional & scientific | 2012 |
| Bailey's Tackle Shop Ltd | Wholesale & retail | 2022 |
| Bakare Properties Limited | Real estate | 2021 |
| Bakkyd Company Ltd | Manufacturing | 2025 |
| Balloon Colour Blending Ltd | Wholesale & retail | 2022 |
| Banelec Limited | Construction | 2005 |
| Bani Logistics Ltd | Transport & logistics | 2026 |
| BAP Property Limited | Real estate | 2009 |
| Barber.Josh.O.P Limited | Other services | 2018 |
| Bargain BED Store Ltd | Wholesale & retail | 2026 |
| Barkley Properties Ltd | Real estate | 2021 |
| Barnett Integration Ltd | Information & communication | 2025 |
| Barnett Properties Limited | Real estate | 1996 |
| Barnett Properties Scot Ltd | Real estate | 2024 |
| Barringtonmedia Ltd | Information & communication | 2025 |
| Barry Manilow Ltd | Arts & recreation | 2022 |
| Barwick Plant Hire Ltd | Administrative & support | 2022 |
| Base Level Trading Ltd | Wholesale & retail | 2025 |
| Baseen Corporation Ltd | Information & communication | 2023 |
| BD26 Investments Ltd | Real estate | 2026 |
| BE Home Properties (Holding) Ltd | Real estate | 2025 |
| Beach IFA Limited | Extraterritorial | 2008 |
| Beach Independent Financial Advisors Limited | Extraterritorial | 2008 |
| Beach Insurance Brokers Limited | Extraterritorial | 2010 |
| Beach Insurance Financial Services Limited | Extraterritorial | 2008 |
| Beach Rugby UK Limited | Arts & recreation | 2021 |
| Beak Street Developments Limited | Construction | 2021 |
| Beam Funding Solutions Limited | Professional & scientific | 2021 |
| Beau Greaves Limited | Arts & recreation | 2025 |
| Beaumont IT (London) Ltd | Administrative & support | 2026 |
| Beaumont IT Ltd | Administrative & support | 2018 |
| Beauty Art Aesthetics Clinic Ltd | Other services | 2025 |
| Beauxhw Ltd | Wholesale & retail | 2022 |
| BED City Limited | Manufacturing | 1990 |
| Bellaliso Holdings Limited | Financial services | 2025 |
| Bellebrook Construction Services Limited | Construction | 2023 |
| Bema Cyber Tech Limited | Information & communication | 2018 |
| Bema Group Limited | Information & communication | 2024 |
| BEN Smith Quantity Surveying Ltd | Professional & scientific | 2022 |