| Arfa Cars Ltd | Wholesale & retail | 2019 |
| ARK Retail (Midlands) Limited | Wholesale & retail | 2015 |
| Armison Ltd | Construction | 2014 |
| Aroha'Shri LLP | | 2025 |
| Arras Motors Ltd | Wholesale & retail | 2025 |
| Artour Travel and Medical Ltd | Professional & scientific | 2020 |
| Arunalu Ltd | Extraterritorial | 2014 |
| AS23.SPACE Technologies Ltd | Manufacturing | 2023 |
| Asankh Ltd | Real estate | 2024 |
| ASD UK Construction Ltd | Construction | 2025 |
| ASG Consultants Ltd | Professional & scientific | 2023 |
| Ashbourne Foods Limited | Wholesale & retail | 2009 |
| Asj&J Ltd | Real estate | 2025 |
| AST Lidder Electric and Building Ltd | Construction | 2021 |
| Aston & Co Estate & Letting Agents Limited | Real estate | 2008 |
| Aston & Co Financial Services Ltd | Financial services | 2013 |
| Aston & Co Inspections Ltd | Households | 2026 |
| ASV Motors Ltd | Wholesale & retail | 2025 |
| Atkar Logistics Ltd | Transport & logistics | 2025 |
| Atmospheric Research and Educonsult CIC | Professional & scientific | 2025 |
| Aurigamagnus Ltd | Health & social care | 2013 |
| Austen Allen Limited | Construction | 1996 |
| Auto 1 Ltd | Construction | 2024 |
| Auto 1 Stop Logistics Ltd | Transport & logistics | 2017 |
| Automotive Prestige Ltd | Wholesale & retail | 2022 |
| AV Industrial Products Holdings Ltd | Wholesale & retail | 2026 |
| AV Industrial Products Limited | Manufacturing | 2000 |
| Avam Drive Limited | Transport & logistics | 2021 |
| AVI Haulage Limited | Transport & logistics | 2024 |
| Avika Krishan Holdings Ltd | Extraterritorial | 2016 |
| AW Energy Consulting Ltd | Professional & scientific | 2020 |
| Axan Ltd | Extraterritorial | 2023 |
| B & B Property Services Limited | Construction | 2019 |
| B W Machine Tools Limited | Administrative & support | 2008 |
| B&B Estate Consultants Ltd | Professional & scientific | 2024 |
| B&F Corporate Limited | Administrative & support | 2023 |
| B&R Leicester Ltd | Hospitality | 2020 |
| B&S Construction Leicester Ltd | Construction | 2024 |
| B2M Connect Ltd | Transport & logistics | 2025 |
| Baaj Roofing Limited | Construction | 2026 |
| Babylon Mortgages Ltd | Financial services | 2015 |
| Bains Rail Ltd | Construction | 2018 |
| Bains Scaffolding Ltd | Construction | 2026 |
| Bajeeva Ltd | Information & communication | 2025 |
| Bargain Touch Ltd | Wholesale & retail | 2023 |
| Barmouth & Pear Tree Properties Ltd | Real estate | 2022 |
| Basic Thinking Limited | Manufacturing | 1996 |
| Batth Transport Ltd | Transport & logistics | 2010 |
| Bayleaf Events Ltd | Hospitality | 2025 |
| Bbman Ltd | Professional & scientific | 2026 |
| BD Car Hire Ltd | Transport & logistics | 2025 |
| BDS Industrial Fabrics (2012) Limited | Manufacturing | 2012 |
| Bear and Bella Books Ltd | Wholesale & retail | 2023 |
| Beauty Boutique (Wigston) Limited | Other services | 2022 |
| Beauty ME Ltd | Extraterritorial | 2021 |
| Beco Green Ltd | Wholesale & retail | 2023 |
| Bee.Gee Accounting Services Ltd | Professional & scientific | 2017 |
| Beetom Ventures Ltd | Wholesale & retail | 2026 |
| Belle ÂME Salon Limited | Other services | 2020 |
| Bellsle Ltd | Wholesale & retail | 2022 |
| Best Candy Shop Ltd | Wholesale & retail | 2025 |
| Best Kebabs and Chippy Ltd | Hospitality | 2026 |
| Best Shop Wigston Ltd | Wholesale & retail | 2025 |
| Bethel Flats 39A Westmeath Avenue Limited | Professional & scientific | 2014 |
| Bethel Koinonia Ministries International | Other services | 2010 |
| Bettaclean (UK) Ltd | Administrative & support | 2014 |
| Bfast Engineering Ltd | Manufacturing | 2025 |
| BGF Fire & Electrical Solutions Limited | Construction | 2008 |
| Bhackn Services Ltd | Health & social care | 2022 |
| Bibielle UK Holdings Limited | Financial services | 2020 |
| Big China Limited | Hospitality | 2023 |
| Bini FK Ltd | Health & social care | 2025 |
| Bird Development Ltd | Construction | 2025 |
| Birkett House School | Education | 2012 |
| Bison Property Maintenance Services Ltd | Manufacturing | 2024 |
| BIZ FK Ltd | Administrative & support | 2025 |
| BJ Taxis Ltd | Transport & logistics | 2025 |
| BJS Traders Ltd | Real estate | 2024 |
| Blaby Express Ltd | Wholesale & retail | 2021 |
| Blaby Group Limited | Financial services | 2023 |
| Black Note Ltd | Construction | 2023 |
| Blackbird Property Leasing Ltd | Professional & scientific | 2025 |
| Blackrock Civils Ltd | Construction | 2018 |
| Blend Tea & Coffee Company Limited | Wholesale & retail | 2009 |
| Blue Breeze Chippy Ltd | Hospitality | 2025 |
| Blue Giraffe Digital Ltd | Information & communication | 2024 |
| Blue Skies Computing Ltd | Information & communication | 2021 |
| Blue Valley Care Ltd | Health & social care | 2023 |
| Bluefox Engraving Ltd | Wholesale & retail | 2026 |
| Blueky Consultants Ltd | Information & communication | 2020 |
| Blueline Computing Limited | Information & communication | 2010 |
| BOB Property Maintenance Limited | Administrative & support | 2018 |
| Bobby Singh Capital Ltd | Financial services | 2025 |
| Body-Coats & Apparel Ltd | Wholesale & retail | 2022 |
| Bogle and Timms Limited | Extraterritorial | 1940 |
| Bolley Holdings Ltd | Financial services | 2026 |
| Bolley Property 2 Ltd | Real estate | 2026 |
| Bolley Property Ltd | Real estate | 2020 |
| Bowbridge Limited | Real estate | 1983 |
| Box Home Services Limited | Construction | 2016 |