| Apollo Duck Ltd | Information & communication | 2006 |
| Apollo Duck Media Ltd | Information & communication | 2023 |
| Appcare Ltd | Information & communication | 2025 |
| Appcom Logistics LP | | 2016 |
| Aptework Resources LP | | 2015 |
| Apuc Limited | Education | 2007 |
| AQ HR Ltd | Professional & scientific | 2025 |
| Aqtiv Ltd | Information & communication | 2026 |
| Aquagen Holdings Ltd | Financial services | 2017 |
| Aquagen Scotland Ltd | Agriculture & fishing | 2016 |
| Aquaklenz Ltd. | Administrative & support | 2003 |
| Aquamatrix Automation Limited | Professional & scientific | 2026 |
| Aquazen Developments Ltd | Real estate | 2025 |
| Aquazen Plumbing Care Ltd | Construction | 2025 |
| Aquazen Plumbing Ltd | Construction | 2024 |
| AR Builders Limited | Construction | 2012 |
| Arari Limited | Wholesale & retail | 2017 |
| ARC BM Ltd | Administrative & support | 2023 |
| Arcall Properties Limited | Real estate | 1969 |
| Archangel Seven Limited | Information & communication | 2020 |
| Archie Mckinnon Painter and Decorators Ltd | Construction | 2019 |
| Architecture & Design by Kane Simpson Ltd | Professional & scientific | 2025 |
| Ardmhor Developments Limited | Construction | 2009 |
| Aristens Trade LP | | 2016 |
| ARK Eats Limited | Hospitality | 2026 |
| Arken Creative Limited | Arts & recreation | 2020 |
| ARM Property Limited | Real estate | 2019 |
| Armac Sales LP | | 2016 |
| Armaco Shipping LP | | 2016 |
| Armstrong Printing (Alloa) Limited | Manufacturing | 2012 |
| Arran Shores Limited | Real estate | 2021 |
| Arranmore Construction (Scotland) Ltd | Construction | 2025 |
| Arraypress Limited | Information & communication | 2021 |
| Arria Automotive Ltd | Wholesale & retail | 2024 |
| Arria Motorhome Hire Ltd | Administrative & support | 2021 |
| Arrow Invest LP | | 2016 |
| Arrowloch Limited | Agriculture & fishing | 1998 |
| Artemis Hotels Management Limited | Professional & scientific | 2021 |
| Artlink Central Limited | Education | 1988 |
| Arvensis RAY Engineers LP | | 2016 |
| Asacas Ltd | Real estate | 2019 |
| Asher Logistics Ltd | Transport & logistics | 2026 |
| Ashmill Caravan Park Ltd | Administrative & support | 2022 |
| ASN IT Consulting Ltd | Information & communication | 2018 |
| ASP Trade Group LP | | 2016 |
| Aspire Continuity Limited | Information & communication | 2002 |
| Asra Central Electrical Ltd | Construction | 2026 |
| Asset & General Finance Ltd | Financial services | 2006 |
| Asset Investment LP | | 2016 |
| Associated Agricultural Oils Limited | Wholesale & retail | 1944 |
| Association of Scottish Visitor Attractions | Other services | 1994 |
| Assured Healthcare (Scotland) Limited | Health & social care | 2009 |
| Assynt IP Systems Limited | Information & communication | 2004 |
| AST Fitness Ltd | Arts & recreation | 2020 |
| AST Properties (Scotland) Ltd. | Real estate | 2013 |
| Astarrigging Ltd | Construction | 2025 |
| Athena Fireplaces, Stirling Ltd. | Wholesale & retail | 2011 |
| Atholl Accountancy Limited | Professional & scientific | 2022 |
| Auchenbowie Estates (Holdings) Limited | Hospitality | 2022 |
| Auchinbowie Limited | Households | 2023 |
| Audistry Ltd | Information & communication | 2026 |
| Augur Precision Medicine Limited | Professional & scientific | 2017 |
| Aural Penumbra Limited | Professional & scientific | 2021 |
| Austin Carey Family Holdings Ltd | Financial services | 2022 |
| Automated Digital Connection Force (Adcf) Ltd | Professional & scientific | 2025 |
| AVC Infrastructure Limited | Construction | 2013 |
| Averi Jablu Ltd | Information & communication | 2023 |
| Aviemore Mountain Lodges Limited | Hospitality | 2007 |
| AW Alterations Limited | Manufacturing | 2018 |
| AW Holdco Limited | Construction | 2016 |
| AW Nature Limited | Professional & scientific | 2010 |
| AW Newco Limited | Construction | 2016 |
| Awineu Ltd | Professional & scientific | 2024 |
| Axiom Logic Limited | Information & communication | 2024 |
| AYE Projects Limited | Construction | 2022 |
| Azimut Universal LP | | 2016 |
| AZSTAR69 Ltd | Wholesale & retail | 2022 |
| B&H Buchanan Property Ltd | Construction | 2026 |
| B-Spoke Mortgages & Property Management LLP | | 2007 |
| B-Spoke Property & Finance Ltd | Other services | 2011 |
| Babes in the Wood Stirling CIC | Wholesale & retail | 2018 |
| Baby Brew Limited | Hospitality | 2019 |
| Back O’Hill Bathroom Centre Ltd | Wholesale & retail | 2019 |
| Bailmont Cyber Ltd | Information & communication | 2024 |
| Bains Ventures Ltd | Real estate | 2025 |
| Baitai Ltd | Hospitality | 2025 |
| Ballachallan / Outerlimits Limited | Other services | 2014 |
| Ballingrew Properties Limited | Real estate | 2020 |
| Balmory Plant Hire Ltd | Administrative & support | 2023 |
| Bannockburn Roofing Company Ltd. | Construction | 2010 |
| Banou Ltd | Real estate | 2023 |
| Baptiston Farm & Co | | 1985 |
| Barbican Nominees Limited | Administrative & support | 1982 |
| Barkmoral Home Boarding Limited | Other services | 2025 |
| Barkmoral Limited | Wholesale & retail | 2018 |
| Barn Lodges Sales Ltd | Manufacturing | 2025 |
| Barney's Beer Limited | Manufacturing | 2012 |
| Barry Mclean Stonemasonry Ltd | Manufacturing | 2025 |
| Base Fitness Training Ltd | Arts & recreation | 2023 |
| Bastion Property Management Ltd | Real estate | 2010 |