| Areb Ltd | Wholesale & retail | 2020 |
| Arete 2020 Limited | Professional & scientific | 2020 |
| Argyll Hydro Ltd | Energy | 2015 |
| Arisaig Produce Ltd | Wholesale & retail | 2023 |
| Arran Estates Limited | Construction | 1985 |
| Arredi (UK) Ltd. | Professional & scientific | 2009 |
| Arrifana Ltd. | Arts & recreation | 2014 |
| Arslan Investment and Property Management Limited | Professional & scientific | 2025 |
| Art Bunker Ltd. | Other services | 2020 |
| Art of Ancient Life Limited | Arts & recreation | 2016 |
| Arun Thai Therapies Ltd | Other services | 2026 |
| ASA Patterson Properties Ltd | Real estate | 2024 |
| Asha Living Ltd | Wholesale & retail | 2019 |
| Ashton Fine Arts Ltd | Wholesale & retail | 2025 |
| Ashton Mcgill Limited | Professional & scientific | 2012 |
| Aspen Forestry Limited | Extraterritorial | 2002 |
| Asteros Property Ltd | Real estate | 2025 |
| Aston Business Services Limited | Professional & scientific | 2007 |
| Athena Healthcare Consulting Limited | Professional & scientific | 2024 |
| Athena Marine Services Ltd | Professional & scientific | 2021 |
| Athole Design & Publishing Ltd. | Information & communication | 2003 |
| Athole Ltd. | Real estate | 2008 |
| Atholl Associates Limited | Professional & scientific | 2019 |
| Atholl Events Ltd | Hospitality | 2024 |
| Atholl Sporting Limited | Arts & recreation | 2023 |
| Atina Hotel Limited | Hospitality | 2017 |
| ATL Motorhomes Limited | Wholesale & retail | 2020 |
| Atlas Mgmt Ltd | Construction | 2025 |
| Atlasconnect Limited | Information & communication | 2003 |
| ATS Childcare Ltd | Education | 2023 |
| ATV Vascular Solutions Ltd | Health & social care | 2024 |
| Atwenus Ltd | Other services | 2025 |
| Auld Bond Bottlers Ltd | Manufacturing | 2020 |
| Aura Wellness Dunning Ltd | Arts & recreation | 2026 |
| Australian Executor Trustees Limited | | 2022 |
| Auto Bunker Ltd. | Transport & logistics | 2020 |
| Auto Hibernation Limited | Transport & logistics | 2024 |
| Auto Services Perth Limited | Wholesale & retail | 2007 |
| Avantra Couriers Ltd | Transport & logistics | 2026 |
| Avbm Investments Limited | Professional & scientific | 2024 |
| Avbm Limited | Professional & scientific | 2015 |
| Aviva (Peak NO.1) UK Limited | Professional & scientific | 1989 |
| Aviva Investors Climate Transition GBP Real Estate General Partner Limited | Financial services | 2021 |
| Aviva Investors Climate Transition GBP Real Estate Limited Partnership | | 2021 |
| Aviva Investors Private Equity Programme 2008 Partnership | | 2008 |
| Avonbridge Care Home Limited | Health & social care | 2023 |
| Axiro Ltd | Wholesale & retail | 2025 |
| Ayasofya Ltd | Hospitality | 2022 |
| B E Breast Clinic Consulting (Aberdeen) Ltd | Health & social care | 2021 |
| B Munro Electrical Limited | Construction | 2020 |
| B. Brodie Joiner & Contractor Ltd | Construction | 2023 |
| B.D. Supplies Limited | Agriculture & fishing | 2000 |
| Babtec Ltd | Information & communication | 2025 |
| Baby & Toddler Boutique Ltd | Wholesale & retail | 2026 |
| Backcountry Survival Ltd | Arts & recreation | 2020 |
| BADGERS25 Ltd | Hospitality | 2025 |
| Bags of Info Limited | Wholesale & retail | 2001 |
| Bahn Associates Ltd | Professional & scientific | 2023 |
| Baiglie Consulting Ltd | Professional & scientific | 2023 |
| Baillie Arnot Developments Ltd | Real estate | 2022 |
| Baillie Arnot Property Ltd | Real estate | 2022 |
| Baillie Financial (Perth) LLP | | 2015 |
| Baillie Financial Limited | Financial services | 2018 |
| Baillie Scott Leisure & Developments Limited | Hospitality | 2015 |
| Bainbridge Motoring Ltd | Wholesale & retail | 2021 |
| Balajee Spice Limited | Extraterritorial | 2016 |
| Balans Facilities Management Limited | Arts & recreation | 2012 |
| Baldowrie Renewables Limited | Energy | 2011 |
| Balfour Consultancy Limited | Administrative & support | 2016 |
| Balgarvie Holdings Limited | Agriculture & fishing | 2018 |
| Balgarvie North Limited | Construction | 2025 |
| Balgour Consulting Services Limited | Professional & scientific | 2020 |
| Balgowan Property Investments Ltd | Construction | 2019 |
| Balhousie Care Limited | Health & social care | 1996 |
| Balhousie Holdings Limited | Professional & scientific | 2005 |
| Balhousie Propco Limited | Real estate | 2025 |
| Ballathie House Hotel Company Limited | Hospitality | 1971 |
| Ballindean Community Company Ltd | Agriculture & fishing | 2023 |
| Ballinloan Renewables Ltd. | Energy | 2011 |
| Balnakeilly Estate Ltd | Real estate | 2017 |
| Banff Tyre Services Limited | Wholesale & retail | 2003 |
| Bankfoot Coachworks Ltd | Wholesale & retail | 2022 |
| Bankies BUS Ltd | Transport & logistics | 2015 |
| Bannerman Decorators EOT Trustee Limited | Financial services | 2026 |
| Bannerman Decorators Ltd | Construction | 2023 |
| Bannerman Holdings Limited | Financial services | 2025 |
| Bannermans Colour Studio Ltd | Administrative & support | 2003 |
| Bar Banter Ltd | Hospitality | 2019 |
| Baraka Houses Ltd | Real estate | 2025 |
| Bare Bones Pet Supplies Ltd | Wholesale & retail | 2014 |
| Bark and Beauty Ltd | Other services | 2019 |
| Bark ‘N’ Bathe Training Salon Ltd | Other services | 2026 |
| Barleycorn Joinery Ltd | Construction | 2021 |
| Barr Fitness Ltd | Health & social care | 2019 |
| Barrs Hydro Ltd | Energy | 2011 |
| Bart Properties Ltd | Hospitality | 2022 |
| Bartholomew Partnership Ltd. | Agriculture & fishing | 2003 |
| Basics Search Limited | Professional & scientific | 2026 |
| Bathroom Installers Limited | Wholesale & retail | 2003 |
| Battison Joinery Ltd | Manufacturing | 2025 |