| Amara Builders Merchants Limited | Wholesale & retail | 2026 |
| AMC Motherwell Ltd | Wholesale & retail | 2025 |
| AMC Solutions (Alba) Limited | Construction | 2020 |
| Amcol Scotland Limited | Administrative & support | 1996 |
| Amelia's WEE Shop Ltd | Wholesale & retail | 2024 |
| Americano Sweets Ltd Ltd | Wholesale & retail | 2026 |
| Amersham Asset Management Ltd | Hospitality | 2024 |
| AMM Accountancy Ltd | Professional & scientific | 2015 |
| AMM IT Limited | Information & communication | 2013 |
| Ammazing Limited | Education | 2023 |
| Ammogconsult Ltd | Information & communication | 2024 |
| Ammp Group Ltd | Real estate | 2019 |
| AMRCONSULTANCY9 Limited | Public administration | 2025 |
| Amready Ltd | Wholesale & retail | 2026 |
| AMS Equipment Limited | Wholesale & retail | 1986 |
| AMW Arboreal Ltd. | Administrative & support | 2010 |
| Amzconrsell Limited | Wholesale & retail | 2025 |
| AN Courier Ltd | Transport & logistics | 2024 |
| ANA Consultancy (Scotland) Ltd | Administrative & support | 2016 |
| Anchiale Plumbing & Heating Limited | Construction | 2017 |
| Anchor and Oak Property Ltd | Real estate | 2026 |
| Anchorus Limited | Real estate | 2017 |
| Anco Construction Limited | Real estate | 1995 |
| Anderson Commercial Ltd | Real estate | 1946 |
| Anderson Deliveries Ltd. | Other services | 2019 |
| Anderson Heating (Scotland) Limited | Construction | 2023 |
| Anderson Real Estate Limited | Real estate | 2022 |
| Andersons Northern Ltd | Professional & scientific | 2011 |
| Andi Developments Limited | Other services | 2026 |
| Andrealla Logistics Ltd | Transport & logistics | 2025 |
| Andrew Duncan & Co (Scotland) Limited | Professional & scientific | 2003 |
| Andrew Scott (Contractor) Limited | Construction | 2014 |
| Andrews of Bothwell Ltd | Wholesale & retail | 2011 |
| ANDREWS89 Logistics Ltd | Transport & logistics | 2025 |
| Andrey Hristoskov Ltd | Wholesale & retail | 2023 |
| Andy Esson Services Ltd | Professional & scientific | 2017 |
| Anemos-Analytics Ltd | Information & communication | 2024 |
| Angeball Limited | Administrative & support | 2023 |
| Angel Nails Bar 8 Ltd | Other services | 2023 |
| Animalia Sport and Fitness Ltd | Other services | 2016 |
| Anjish (Glasgow) Ltd | Hospitality | 2011 |
| Anjuman E AHD E Wilayet Limited | Other services | 2024 |
| ANN Davidson Butchers Ltd | Wholesale & retail | 2022 |
| Antibody Analytics Limited | Professional & scientific | 2015 |
| Anton TOM Ltd | Hospitality | 2017 |
| Antonine Printing Inks Limited | Manufacturing | 1979 |
| ANU Food Store Ltd | Hospitality | 2022 |
| Anunobi Holdings Ltd | Transport & logistics | 2025 |
| AO Majestic Ltd | Hospitality | 2019 |
| AP Apartments Ltd | Hospitality | 2019 |
| AP Holdings (Hamilton) Ltd | Real estate | 1998 |
| APEXLETS2024 Ltd | Real estate | 2024 |
| APL Business Intelligence Ltd | Administrative & support | 2012 |
| APL Logistics Ltd | Transport & logistics | 2023 |
| Aqua Projects Limited | Water & waste | 2002 |
| Aquatech Plumbing & Drainage Ltd | Construction | 2014 |
| AR Luxury Travels Ltd | Transport & logistics | 2026 |
| AR Production Services Limited | Administrative & support | 2026 |
| Arbitrage Holdings (Scotland) Ltd | Financial services | 2026 |
| Arbitrage Media Ltd | Information & communication | 2024 |
| ARC Beauty Lounge Ltd | Health & social care | 2025 |
| ARC Construction Services (Scotland) Ltd | Construction | 2014 |
| ARC HV Ltd | Construction | 2026 |
| Archibald Macinnes and Company Limited | Financial services | 1956 |
| Arctic Carwash and Tyres Ltd | Administrative & support | 2024 |
| Ardblair Associates Ltd. | Administrative & support | 2000 |
| Ardcroft Medical Clinic Ltd | Health & social care | 2023 |
| Arden Strategies Limited | Professional & scientific | 2015 |
| Ardenlea Properties Ltd | Real estate | 2020 |
| Ardentra Ltd | Wholesale & retail | 2026 |
| Ardfern Limited | Education | 2007 |
| Ardvarna House Ltd | Wholesale & retail | 2026 |
| Areeba Grocers Ltd | Wholesale & retail | 2025 |
| ARG Services Ltd | Other services | 2024 |
| Argent Energy (UK) Limited | Manufacturing | 2001 |
| Argyll Energy Solutions Ltd | Water & waste | 2012 |
| Arianna Properties Ltd | Hospitality | 2017 |
| Arisaig Engineering Ltd | Professional & scientific | 2025 |
| Arisaig Farm Partnership LLP | | 2015 |
| Arisaig Holdings Ltd | Financial services | 2022 |
| Arisaig Renewables LLP | | 2014 |
| Arizona Bay Corporation Ltd | Information & communication | 2023 |
| ARJ Properties Ltd | Real estate | 2025 |
| Arleenoshops Ltd | Wholesale & retail | 2019 |
| Armit Autos Ltd | Wholesale & retail | 2026 |
| Arresgill Energy Limited | Energy | 2022 |
| Arresgill Energy Storage 1 Limited | Energy | 2023 |
| Arresgill WF Limited | Energy | 2022 |
| Arrow Corporate Promotions Limited | Administrative & support | 2008 |
| Arshad & Co. Accountancy Ltd | Professional & scientific | 2016 |
| Artemesia Limited | Administrative & support | 2020 |
| Asaad's Properties Ltd | Real estate | 2012 |
| Aselu Ltd | Wholesale & retail | 2024 |
| Ashpods Ltd | Wholesale & retail | 2025 |
| ASK the Structural Engineer Ltd | Professional & scientific | 2023 |
| ASP Scot Ltd | Real estate | 2026 |
| Associated Rentals Limited | Real estate | 1972 |
| Assure Catering Engineers Ltd | Manufacturing | 2019 |
| Assured Building Contractors (Scotland) Limited | Construction | 2018 |
| Assured Coatings Limited | Construction | 2023 |