| Arck Holdings Ltd | Financial services | 2026 |
| Arcticpubs Limited | Hospitality | 2025 |
| Ardach Joinery Ltd | Construction | 2017 |
| Ardach Properties Ltd | Real estate | 2019 |
| Ardler Ltd. | Professional & scientific | 2011 |
| Ardler Village (Dundee) Limited | Hospitality | 2016 |
| Ardlow Limited | Real estate | 2022 |
| Ardvreck Developments Limited | Construction | 2016 |
| ARG Technica Ltd | Information & communication | 2019 |
| Argeeco Ltd. | Real estate | 1998 |
| Argh Investments Ltd | Financial services | 2024 |
| Argon Universal LP | | 2017 |
| Argus Consultancy Ltd | Information & communication | 2016 |
| Argyle Properties (Dundee) Ltd | Real estate | 2015 |
| ARH Accountants Limited | Professional & scientific | 2018 |
| Ariella Technical Services Limited | Construction | 2023 |
| Arielle Retail Ltd | Wholesale & retail | 2026 |
| Arif & Co. ( International ) Ltd | Hospitality | 2019 |
| Aristocrats House of Fashion and Couture Ltd | Manufacturing | 2019 |
| ARK & Blacksmith Ltd | Information & communication | 2026 |
| ARK Autopaint and Panels Ltd | Wholesale & retail | 2025 |
| ARK Car Electrics Ltd | Wholesale & retail | 2019 |
| ARK Kitchen Design Limited | Wholesale & retail | 2016 |
| ARK Properties (Scotland) Limited | Real estate | 2021 |
| ARK Property & Investment Group Limited | Real estate | 2022 |
| Arklay Foods Ltd | Hospitality | 2020 |
| Arktx Limited | Professional & scientific | 2019 |
| Arkwell Homes Limited | Real estate | 2021 |
| Arlene Conroy Limited | Other services | 2016 |
| Arlington Products L.P. | | 2012 |
| ARM Consulting (Scotland) Ltd | Professional & scientific | 2025 |
| Arnbrook Investments Limited | Professional & scientific | 1997 |
| Arnie's House Ltd | Wholesale & retail | 2023 |
| Arnott Inspection Services Ltd | Professional & scientific | 2023 |
| Around the Coast Ltd | Real estate | 2024 |
| Arran Adam Joinery Limited | Manufacturing | 2019 |
| Arran James Ltd | Construction | 2020 |
| Arrnic Properties Ltd | Real estate | 2025 |
| Art Angel (Scotland) Limited | Arts & recreation | 2009 |
| Art Night Dundee CIC | Arts & recreation | 2024 |
| Art Quarter Ltd | Arts & recreation | 2018 |
| Art-B Limited | Wholesale & retail | 2012 |
| Artan Property Ltd | Construction | 2026 |
| Artbe Ltd | Wholesale & retail | 2017 |
| Artberg Experts L.P. | | 2015 |
| Artech Couriers Ltd | Transport & logistics | 2017 |
| Arthro Therapeutics Ltd | Health & social care | 2020 |
| Arthur Garty & Co. Ltd. | Professional & scientific | 2001 |
| Arthurlaw Ltd | Households | 2025 |
| Arthurstone Civil Engineering Ltd | Construction | 2022 |
| Arthurstone Construction Limited | Construction | 2001 |
| Arthurstone Limited | Construction | 2001 |
| Articulate Energy Limited | Manufacturing | 2015 |
| Artisana Fine Foods Ltd | Hospitality | 2022 |
| Artistic Touch Studio Ltd | Other services | 2024 |
| Arts and Communities Association | Arts & recreation | 2002 |
| Arturs Foods Ltd | Hospitality | 2019 |
| Aruncus Limited | Professional & scientific | 1994 |
| ARW Investments Ltd | Health & social care | 2020 |
| AS & Sons Properties Ltd | Real estate | 2024 |
| AS Clark Consultants Ltd | Agriculture & fishing | 2013 |
| AS Food TAY Ltd | Hospitality | 2025 |
| AS Henderson Properties Ltd | Real estate | 2021 |
| AS Soon Services Ltd | Manufacturing | 2021 |
| Asam Food Store Ltd | Wholesale & retail | 2018 |
| Asbestos Action (Tayside) | Information & communication | 2002 |
| Asbestos Management Services (Scotland) Limited | Professional & scientific | 2004 |
| Ascend Capital Partners Limited | Professional & scientific | 2025 |
| Asck Consultants Limited | Administrative & support | 2007 |
| Asey Labs Ltd | Information & communication | 2025 |
| ASG Electrical Contractors Ltd | Construction | 2019 |
| ASH Darling Services Limited | Professional & scientific | 2012 |
| ASH Investments (Dundee) Limited | Real estate | 2018 |
| Ashbourne Catering Limited | Hospitality | 2025 |
| Ashco Logistics Services Ltd | Administrative & support | 2024 |
| Ashley Wallace Hair Ltd | Health & social care | 2025 |
| Ashludie Power Services Ltd | Construction | 2025 |
| Ashmond Express L.P. | | 2011 |
| Ashrise Holdco Limited | Manufacturing | 2026 |
| Ashtag Beauty Ltd | Other services | 2024 |
| Ashton Developments (Scotland) Limited | Real estate | 2019 |
| Ashton Joiners (Scotland) Limited | Construction | 2019 |
| Ashveil Weddings Limited | Transport & logistics | 2020 |
| Asian Scottish Trading Company | | 2002 |
| ASK CS Limited | Professional & scientific | 2009 |
| ASK Property Projects Ltd | Real estate | 2018 |
| Aska Energy (UK) Ltd | Energy | 2012 |
| Aslan Properties & Investments Limited | Real estate | 2014 |
| Asma Pelvicare Ltd | Other services | 2024 |
| Asnbrothers Ltd | Wholesale & retail | 2026 |
| Asni Ltd | Information & communication | 2023 |
| ASP Pallets Ltd | Other services | 2018 |
| Aspen Joiners Ltd | Construction | 2023 |
| Aspen Joiners Property Ltd | Real estate | 2025 |
| Aspire Commercial Cleaning Limited | Other services | 2017 |
| Aspire Consultancy (Scotland) Limited | Professional & scientific | 2025 |
| Aspire Junction Property Ltd | Real estate | 2026 |
| Aspire VOX Limited | Arts & recreation | 2016 |
| Asset Managers Scotland Limited | Financial services | 2020 |
| Assure (Scotland) Limited | Administrative & support | 2025 |