| Avreddy Limited | Wholesale & retail | 2025 |
| Avyay Investments Ltd | Financial services | 2026 |
| AW Elements Ltd | Manufacturing | 2020 |
| AW Reid Ltd | Professional & scientific | 2024 |
| AWA Solutions Limited | Professional & scientific | 2020 |
| Awesome Healthcare Services (AHS) Limited | Health & social care | 2022 |
| AWS Leasing Limited | Real estate | 2021 |
| AWW Engineering Limited | Professional & scientific | 2022 |
| Axalta Coating Systems Huthwaite UK Limited | Manufacturing | 1909 |
| Axess North Sea Holding Limited | Professional & scientific | 2019 |
| Axess North Sea Limited | Professional & scientific | 2014 |
| Axiim Limited | Professional & scientific | 2021 |
| Axis Energy Projects Group Limited | Professional & scientific | 2016 |
| Axis Energy Projects Limited | Professional & scientific | 2008 |
| Axten Netball Academy Ltd | Education | 2024 |
| Axten Sport Academy Ltd | Arts & recreation | 2016 |
| AXV Audio Visual Limited | Extraterritorial | 2025 |
| AY Plumbing and Heating Ltd | Construction | 2022 |
| Ayaan Byron Ltd | Hospitality | 2018 |
| Aydia Consulting Ltd | Information & communication | 2013 |
| Ayeplumb Limited | Construction | 2025 |
| Ayesha Education Programe Ltd | Education | 2025 |
| Aylin Gunduz Limited | Hospitality | 2025 |
| Aymm Food Limited | Other services | 2020 |
| Ayoms Ltd | Health & social care | 2021 |
| AYR Flexpower Limited | Energy | 2024 |
| AZ Artresin Limited | Arts & recreation | 2020 |
| AZ Constructions ABD Ltd | Construction | 2025 |
| AZ International Consulting Ltd | Professional & scientific | 2021 |
| Azimuth Oilfield Systems Ltd. | Mining & quarrying | 2009 |
| Azure Blue Limited | Wholesale & retail | 2021 |
| Azure Resources Ltd | Information & communication | 2019 |
| B Clark Joinery Services Ltd | Construction | 2018 |
| B Hogg Mechanical Services Limited | Manufacturing | 2025 |
| B J Winton Consultants Limited | Mining & quarrying | 2020 |
| B M Rigging Services Limited | Construction | 2019 |
| B Nicolson Ltd | Professional & scientific | 2019 |
| B R L Limited | Administrative & support | 2000 |
| B W Plumbing & Heating Services (Aberdeen) Limited | Construction | 2019 |
| B&K Letting Service Ltd | Real estate | 2024 |
| B&K Partners Ltd | Real estate | 2021 |
| B&S Properties (Scotland) Ltd | Real estate | 2024 |
| B-A Auction Marts Ltd. | Wholesale & retail | 2025 |
| B.Dester Services Ltd | Manufacturing | 2018 |
| B.E. Inspection Services Ltd | Professional & scientific | 2024 |
| B.S. (Developments) Limited | Construction | 1984 |
| B.S.F. International (U.K.) Limited | Administrative & support | 2000 |
| B.S.P. Timber Limited | Agriculture & fishing | 2005 |
| B15 Planning Services Limited | Professional & scientific | 2022 |
| B2M Limited | Professional & scientific | 2002 |
| BA Corporate Services Limited | Professional & scientific | 2013 |
| BA5 Limited | Professional & scientific | 2021 |
| Baan MAA Ltd | Other services | 2024 |
| Babok Ltd | Wholesale & retail | 2026 |
| Babs Green Fingers Ltd | Administrative & support | 2025 |
| Baby Jewel Limited | Hospitality | 2022 |
| Babylon Associates Limited | Real estate | 1991 |
| BAC Drilling Limited | Construction | 2026 |
| Bachlaw Limited | Health & social care | 2009 |
| Back Property Limited | Real estate | 2014 |
| Badb Property Limited | Real estate | 2025 |
| Badentoy Garage Limited | Wholesale & retail | 2023 |
| Badger Buildings Limited | Real estate | 2021 |
| Badukweld Ltd | Manufacturing | 2018 |
| Bagel Tribe Ltd | Hospitality | 2024 |
| Bagnolandia Limited | Financial services | 2025 |
| Bain Decor Company Limited | Construction | 2015 |
| Bainer Engineering Services Ltd | Manufacturing | 2026 |
| Baird Subsea Ltd. | Mining & quarrying | 2008 |
| Baird's Pharmacy Limited | Administrative & support | 2012 |
| Bairsto Property Company Limited | Real estate | 1973 |
| BAJ Investments Limited | Administrative & support | 2003 |
| Bakebond Limited | Manufacturing | 2025 |
| Baker Hughes (BJ) Ltd. | Extraterritorial | 1985 |
| Baker Hughes Pressure Control Limited | Professional & scientific | 1975 |
| Baker Hughes UK Pension Trustees Limited | Financial services | 1980 |
| Balaban Properties Limited | Real estate | 2025 |
| Balacar Services Ltd | Professional & scientific | 2025 |
| Balado Limited | Administrative & support | 2025 |
| Bale Services Ltd | Professional & scientific | 2019 |
| Balfour Farms | | 1979 |
| Balfour Practice Limited | Health & social care | 2021 |
| Balgownie Geoscience Ltd | Mining & quarrying | 2020 |
| Balgranach Properties Limited | Financial services | 1998 |
| Ballater GIN Ltd | Wholesale & retail | 2025 |
| Balmedie Pet Crematorium Limited | Public administration | 2008 |
| Balmoral Advanced Composites Limited | Professional & scientific | 2003 |
| Balmoral Composites Limited | Professional & scientific | 2002 |
| Balmoral Comtec Limited | Manufacturing | 2006 |
| Balmoral Contractors Limited | Administrative & support | 2016 |
| Balmoral Employee Benefit Trustees Limited | Professional & scientific | 2008 |
| Balmoral Group Holdings Limited | Financial services | 2004 |
| Balmoral Intellectual Properties Limited | Professional & scientific | 1996 |
| Balmoral Intra LP | | 2013 |
| Balmoral Park Limited | Real estate | 2004 |
| Balmoral Polymer Engineering Limited | Professional & scientific | 1980 |
| Balmoral Renewables Limited | Financial services | 2020 |
| Balmoral Tanks Limited | Manufacturing | 2006 |
| Balmoral Webco Ltd. | Professional & scientific | 1989 |
| Balmoral Woodbank Limited | Real estate | 1980 |