| Arnfield Care Limited | Health & social care | 1999 |
| Arnfield CQV Limited | Financial services | 2019 |
| Arnfield Engineering Ltd | Real estate | 2014 |
| Arnfield Holdings Limited | Education | 2018 |
| Art VR Limited | Wholesale & retail | 2024 |
| Artemis Analytical Ltd | Professional & scientific | 2016 |
| Artr Services Ltd | Construction | 2020 |
| Arturo Gulla Asset Management Limited | Households | 2025 |
| Arundel and Crawford Ltd | Professional & scientific | 2013 |
| Arundel Landscapes Limited | Other services | 2011 |
| Arundel Tree Care Ltd | Administrative & support | 2022 |
| Asbestos Compliance Limited | Professional & scientific | 2013 |
| Asbestos Go Limited | Construction | 2020 |
| Asdti Limited | Wholesale & retail | 1998 |
| Ashton Steel Holdings Limited | Financial services | 2002 |
| Ashton Steel Stockholders Limited | Wholesale & retail | 1970 |
| Aspinall Wright Limited | Professional & scientific | 2012 |
| Astbury Dwellings Limited | Real estate | 2025 |
| Astbury Installation Services Ltd | Other services | 2021 |
| Aston Brammer Ltd | Other services | 2020 |
| AT the Beach Ltd | Hospitality | 2022 |
| Atarna Ltd | Information & communication | 2025 |
| ATC GAS, Heating & Plumbing Ltd | Construction | 2024 |
| Attc Education Ltd | Education | 2025 |
| Aunoo AI Ltd | Information & communication | 2025 |
| Aura Glossop Ltd | Hospitality | 2024 |
| Avaifor Limited | Information & communication | 2015 |
| AW Lifting Assessments Limited | Transport & logistics | 2018 |
| AWM Business Solutions Limited | Professional & scientific | 2013 |
| Awry Apparel Company Limited | Wholesale & retail | 2021 |
| Ayubowan (Crewe) Limited | Hospitality | 2025 |
| Ayubowan (Doncaster) Ltd | Hospitality | 2026 |
| Ayubowan (Preston) Ltd | Hospitality | 2026 |
| Ayubowan Nice Food Ltd | Hospitality | 2023 |
| AZ Capital Ltd | Financial services | 2025 |
| AZ Forge Ltd | Information & communication | 2025 |
| B Subsea Limited | Other services | 2019 |
| B&C Aspire Homes Limited | Real estate | 2022 |
| B.R.O.C Joinery Ltd | Construction | 2019 |
| Baker ST. Residents Management Limited | Real estate | 2024 |
| Bakers Construction Services Ltd | Construction | 2016 |
| Balloon Occasions Limited | Arts & recreation | 2007 |
| Balti Palace NW Ltd | Hospitality | 2025 |
| Bankswood Treecare Ltd | Administrative & support | 2014 |
| Bare Menswear Ltd | Wholesale & retail | 2018 |
| Barker & Co Accountants Ltd | Professional & scientific | 2003 |
| Barnaby Jones Funeral Services Limited | Other services | 2026 |
| Barrett Removals Limited | Transport & logistics | 2021 |
| Barry Group Limited | Construction | 2024 |
| Bawc Property Limited | Real estate | 2025 |
| BB Property Maintenance Ltd | Construction | 2026 |
| BE Your Time Ltd | Administrative & support | 2024 |
| Beach and Boudoir Limited | Wholesale & retail | 2020 |
| Beauty by Fern Limited | Other services | 2025 |
| Beauty by Susan Limited | Other services | 2025 |
| Beauty PAD (Glossop) Ltd | Other services | 2018 |
| BEE Nest Properties Limited | Real estate | 2018 |
| Beebo Nursery Bedding Ltd | Wholesale & retail | 2014 |
| Beechwood Care Ltd | Health & social care | 2026 |
| Beeson Waste Disposal Limited | Water & waste | 1990 |
| Belle Print & Design Limited | Extraterritorial | 2011 |
| BEN Colclough Automotives Ltd | Wholesale & retail | 2018 |
| Benezet IT Ltd | Administrative & support | 2011 |
| Bentley Cleaning Services Ltd | Construction | 2019 |
| Beone Mindset CIC | Education | 2022 |
| Bespoke Cooling Solutions Limited | Construction | 2023 |
| Bespoke Metal Studio Ltd | Manufacturing | 2015 |
| Best Hand Car Wash PVT Ltd | Administrative & support | 2024 |
| Bestech Solutions UK Limited | Professional & scientific | 2022 |
| Beyond Systems Limited | Information & communication | 2006 |
| Bhbl 2011 Limited | Hospitality | 2011 |
| Bien Venue Limited | Administrative & support | 2008 |
| Bifrost Limited | Construction | 2025 |
| Big Bubbles Trade Limited | Construction | 2024 |
| Big Orange Floorcare Limited | Administrative & support | 2026 |
| Bigandmini Ltd | Real estate | 2014 |
| Billy's Grill Ltd | Hospitality | 2024 |
| Billys Chippy Ltd | Hospitality | 2025 |
| BIO Moss Solutions Limited | Professional & scientific | 2025 |
| Bio-Logic Science Instruments Ltd | Manufacturing | 1989 |
| Black Heath Engineering Services Ltd | Professional & scientific | 2025 |
| Black Tail Design Ltd | Professional & scientific | 2025 |
| Black Vault Studios Limited | Information & communication | 2025 |
| Blackflag Fencing Ltd | Construction | 2025 |
| Blanco Restaurants Ltd | Hospitality | 2019 |
| Bleiker Surveys Limited | Mining & quarrying | 2005 |
| Blessed Prosperity F&B Trading Co Ltd | Hospitality | 2026 |
| BLK Clinical Limited | Water & waste | 2017 |
| BLK Inkorporated Ltd | Other services | 2022 |
| BLK Powder Limited | Water & waste | 2017 |
| Blossom Boutique Knutsford Limited | Wholesale & retail | 2021 |
| Blossom Ladies Boutiques Limited | Wholesale & retail | 2020 |
| Blue Crown Building Consultancy Limited | Professional & scientific | 2020 |
| Blue Rose Financial Limited | Administrative & support | 2023 |
| Bluebox Systems Limited | Information & communication | 2007 |
| Blueprint Acres Ltd | Real estate | 2025 |
| Bodyworks Injury Clinic Limited | Health & social care | 2026 |
| Boomtown Limited | Real estate | 2025 |
| Bootht Limited | Wholesale & retail | 2025 |
| Bowker Machinery Limited | Manufacturing | 1998 |