| Alzama Limited | Information & communication | 2015 |
| AM Plant & Truck Commercial Limited | Wholesale & retail | 2013 |
| AMA POE Drylining Limited | Construction | 2026 |
| Amachiproperties Limited | Real estate | 2025 |
| Amarrey 1ST Ltd. | Hospitality | 2019 |
| Amber Deliveries Limited | Transport & logistics | 2025 |
| Anatolie Construction Services Ltd | Construction | 2024 |
| Andcar Refurbished Ltd | Construction | 2019 |
| Andreas Mortgages Ltd | Financial services | 2026 |
| Angel Desserts Limited | Hospitality | 2021 |
| Angelina Jackson Ltd | Administrative & support | 2015 |
| Anindita Khanna & Associates Ltd | Health & social care | 2021 |
| ANS Structural Ltd | Construction | 2022 |
| Anthropic Traders Ltd | Wholesale & retail | 2025 |
| Antoinette Antoine Media Ltd | Manufacturing | 2026 |
| APC Express Ltd | Transport & logistics | 2018 |
| APS Supports UK Ltd | Hospitality | 2025 |
| AR7 Properties Ltd | Real estate | 2025 |
| Arcese UK Limited | Transport & logistics | 2005 |
| ARK Pacific Limited | Transport & logistics | 2016 |
| Artix Flooring Ltd | Construction | 2023 |
| Aryan Assets Ltd | Real estate | 2025 |
| ASE Trans Ltd | Transport & logistics | 2019 |
| Ashanti Cleaning Company Limited | Administrative & support | 2025 |
| Ashk Ltd | Wholesale & retail | 2024 |
| Ashraf Mraish Ltd | Real estate | 2025 |
| Ashton International Trading UK Ltd | Wholesale & retail | 2021 |
| Assurelogic Ltd | Information & communication | 2026 |
| Ateez Ltd | Administrative & support | 2014 |
| Atlantic Sports Development Limited | Education | 2011 |
| Australia Transport Limited | Transport & logistics | 2023 |
| Auto Terminal Japan Limited | Professional & scientific | 2021 |
| Auto Terminal Japan UK Limited | Wholesale & retail | 2023 |
| Autointellect Ltd | Information & communication | 2026 |
| AVI Group Mmxx Ltd | Construction | 2020 |
| Axione Tech Limited | Information & communication | 2025 |
| Ayden Construction Ltd | Construction | 2018 |
| Ayidale-Properties Ltd | Real estate | 2020 |
| B E S Services Limited | Construction | 1993 |
| B2HL World Limited | Wholesale & retail | 2018 |
| BA Imports Limited | Wholesale & retail | 2020 |
| Baako YE Apem Consulting Limited | Other services | 2016 |
| Bamifel Limited | Health & social care | 2023 |
| Banabi Childcare Ltd | Public administration | 2020 |
| Bangladesh Pratidin Ltd | Information & communication | 2018 |
| Bansal's Care Limited | Administrative & support | 2023 |
| Baobab Logistics & Shipping Ltd | Transport & logistics | 2024 |
| Baroca Limited | Construction | 2016 |
| Baxter's Transport (Waltham Cross) Limited | Professional & scientific | 1960 |
| Bbhairwoldx Limited | Wholesale & retail | 2025 |
| Bdot Music Empire Ltd | Arts & recreation | 2024 |
| BEA Trans Limited | Transport & logistics | 2016 |
| Bead Homes and Properties Ltd | Real estate | 2025 |
| Bead Ventures UK Limited | Wholesale & retail | 2025 |
| Beautiful Baby Collection Ltd | Wholesale & retail | 2022 |
| Beckchoice Limited | Transport & logistics | 1979 |
| BEE Transport Ltd | Transport & logistics | 2018 |
| Belicious Bakes & Treats Ltd | Manufacturing | 2025 |
| Bello Bambinos Boutique Ltd | Wholesale & retail | 2024 |
| Benson TEK Ltd | Professional & scientific | 2025 |
| Bero Ltd | Hospitality | 2024 |
| Best Capital Services Ltd | Construction | 2014 |
| Best of B Limited | Wholesale & retail | 2020 |
| Best of the Best Finishers Limited | Wholesale & retail | 2007 |
| Bestway Care Services Limited | Health & social care | 2020 |
| Bethel Place Ltd | Information & communication | 2025 |
| Betto Properties Limited | Real estate | 2025 |
| Bezaritz Ltd | Wholesale & retail | 2022 |
| Bgreener Ltd | Wholesale & retail | 2023 |
| Bhhap Contract Ltd | Construction | 2017 |
| Bibby Group Limited | Transport & logistics | 2015 |
| BIC Logistics Limited | Transport & logistics | 2016 |
| Biesrem Limited | Other services | 2016 |
| Big BRO Transport Ltd | Transport & logistics | 2019 |
| Bigg Services Ltd | Transport & logistics | 2024 |
| Bikoy Limited | Other services | 2014 |
| Bilray Ltd | Transport & logistics | 2025 |
| Bimaah International Ltd | Professional & scientific | 2025 |
| Bion Energy Limited | Professional & scientific | 2012 |
| Bion-E Limited | Professional & scientific | 2023 |
| Bishops MPT Ltd | Information & communication | 2015 |
| Bitzz N Bobzz UK Limited | Wholesale & retail | 2025 |
| BJ Innovation Limited | Administrative & support | 2024 |
| Bkohealth Ltd | Health & social care | 2024 |
| Bkosourcing Ltd | Administrative & support | 2024 |
| Black Horse Media Limited | Professional & scientific | 2013 |
| Blirzt Care Solutions Ltd | Public administration | 2023 |
| Blirzt Limited | Health & social care | 2016 |
| Bliss Global Services Ltd | Wholesale & retail | 2018 |
| BLR Logistics Ltd | Transport & logistics | 2026 |
| Blue Phoenix Healthcare Ltd | Health & social care | 2026 |
| Blue Room Enterprises Ltd | Information & communication | 2018 |
| Bluebird Consult Ltd | Information & communication | 2025 |
| Bluegate Inc Limited | Wholesale & retail | 2022 |
| Blueglam Limited | Wholesale & retail | 2024 |
| Bluemak Limited | Transport & logistics | 2018 |
| Bluerock Property Services Ltd | Real estate | 2023 |
| BNV Interiors Ltd | Construction | 2022 |
| Boat Autobody Works Ltd | Manufacturing | 2024 |
| Bobutrans Limited | Transport & logistics | 2025 |