| Ajzf Limited | Hospitality | 2025 |
| AK Signs & Prints Ltd | Manufacturing | 2019 |
| Ak-Refurbishments Ltd | Construction | 2025 |
| AK84 Takeaway Ltd | Hospitality | 2025 |
| Akash Cabs Ltd | Transport & logistics | 2024 |
| AKH Properties (Scotland) Limited | Real estate | 2017 |
| Akkadia Press Ltd | Information & communication | 2016 |
| AL Ghous Limited | Hospitality | 2025 |
| Al-Ahad Retails Limited | Wholesale & retail | 2025 |
| Al-Arifeen Pathways Ltd | Wholesale & retail | 2025 |
| Al-Esawy Brothers Ltd | Wholesale & retail | 2025 |
| Al-Jannat Food Ltd | Hospitality | 2021 |
| Al-Maktoum Foundation (Scotland) | Education | 2005 |
| Al-Mulk Global Ltd | Wholesale & retail | 2025 |
| ALA Enterprising Ltd | Wholesale & retail | 2021 |
| Alaina Group Ltd | Professional & scientific | 2026 |
| Alam Foods Ltd | Hospitality | 2025 |
| Alan Brown Roofing Services Limited | Administrative & support | 2015 |
| Alan Dunn Financial Management Limited | Financial services | 2025 |
| Alan Glen Wealth Management Limited | Administrative & support | 2015 |
| Alan Mcintee (Group) Ltd | Construction | 2019 |
| Alan Mcintee Limited | Construction | 2023 |
| Alan's Leisure Ltd | Hospitality | 2017 |
| Alator Data Services Ltd | Professional & scientific | 2020 |
| Alba Chiropractic Limited | Health & social care | 2006 |
| Alba Land Surveys Limited | Professional & scientific | 2005 |
| Albacom Limited | Manufacturing | 1989 |
| Albany & Co. Consultants Limited | Professional & scientific | 2025 |
| Albany Building Services Ltd | Construction | 2026 |
| Albany Renewables & Compliance Ltd | Professional & scientific | 2026 |
| Albert Bar Dundee Ltd | Hospitality | 2025 |
| Albert Street Grocers Ltd | Wholesale & retail | 2025 |
| Alberti Accounting Ltd | Professional & scientific | 2025 |
| Alberto Dundee Ltd | Hospitality | 2019 |
| Alberto Retail Limited | Wholesale & retail | 2025 |
| Albicia Ltd | Households | 2025 |
| Albion Financial Solutions Limited | Financial services | 2024 |
| Albridge Impex LP | | 2017 |
| Alchemy CNC Engineering Limited | Professional & scientific | 2016 |
| Alcheriva Ltd | Real estate | 2025 |
| Aldea Bella (NO.4) Limited | Real estate | 1987 |
| Alere Technologies Limited | Manufacturing | 2004 |
| Alex Barclay HSE Associates Limited | Professional & scientific | 2018 |
| Alex Pearson Architect Limited | Professional & scientific | 2019 |
| Alex&Catering Ltd | Manufacturing | 2025 |
| Alexander (Dundee) Ltd | Hospitality | 2015 |
| Alexander Community Development Limited | Education | 2020 |
| Alexander Decorators Limited | Construction | 2012 |
| Alexander Mechanical Services Ltd | Professional & scientific | 2023 |
| Alexander Oastler (1946) Limited | Construction | 1946 |
| Alexander Properties (2010) Limited | Real estate | 2011 |
| Alexander Ritchie Plumbers Ltd. | Construction | 2019 |
| Alfanet Sales L.P. | | 2013 |
| Alfee Developments Ltd | Construction | 2019 |
| Alfee Properties Ltd | Real estate | 2019 |
| Alford Ventures L.P. | | 2015 |
| Alfra Limited | Transport & logistics | 2003 |
| Alfredo Private Hire Limited | Transport & logistics | 2026 |
| ALG GAS Services Ltd | Construction | 2019 |
| ALI & Co Investments Limited | Real estate | 2024 |
| Alicat Services Ltd | Administrative & support | 2019 |
| Alicia Investment Limited | Construction | 2021 |
| Align Pilates With Rosie Ltd | Arts & recreation | 2017 |
| Aliko Ltd | Construction | 2021 |
| Alin Ochenatu Ltd | Transport & logistics | 2024 |
| Alina's Premium Cleaning Service Limited | Administrative & support | 2026 |
| Alisha's Treatment Consultancy Ltd | Health & social care | 2025 |
| Alisoc Investment & Co | | 1993 |
| Alison Bruce Property Management Ltd | Real estate | 2011 |
| Alison Stewart Hairdressing Limited | Other services | 2011 |
| Alistair Leith Motors Limited | Administrative & support | 2013 |
| Aljos Management Ltd | Administrative & support | 2019 |
| Alkagesta Petrolium LP | | 2016 |
| ALL About Glass Ltd | Wholesale & retail | 2024 |
| ALL in Good Health and Fitness Limited | Arts & recreation | 2009 |
| ALL the Colour Ltd | Manufacturing | 2023 |
| ALL Trade Link Ltd | Information & communication | 2025 |
| ALL Year Bloom Ltd | Professional & scientific | 2019 |
| Allan Brown ALL Trades Ltd | Construction | 2023 |
| Allan Brown Joiner & Building Services Ltd | Construction | 2017 |
| Allan Fisheries Ltd | Administrative & support | 2018 |
| Allan Lifting Services Limited | Professional & scientific | 2014 |
| Allan Smith Electrical Services Ltd | Mining & quarrying | 2019 |
| Allantiques Limited | Wholesale & retail | 2017 |
| Allardyce Healthcare Limited | Wholesale & retail | 1964 |
| Allberg Management L.P. | | 2015 |
| Allbright Ventures L.P. | | 2015 |
| Allform Wellness Limited | Arts & recreation | 2022 |
| Alliance Electrical Services Limited | Real estate | 2019 |
| Alliance Trust Real Estate Partners | | 2005 |
| Alliance Witan PLC | Financial services | 1888 |
| Allisons Paving and Landscapes Limited | Administrative & support | 2019 |
| Allpab Limited | Extraterritorial | 2014 |
| Allset Impacts LP | | 2017 |
| Alltech International Limited | Professional & scientific | 2016 |
| Ally Bally Productions Ltd | Information & communication | 2014 |
| Ally BEE Executive Travel Ltd | Transport & logistics | 2025 |
| Ally Burdge Coaching Ltd | Other services | 2021 |
| Ally Meek Joinery Ltd | Construction | 2023 |
| Allypaterson Ltd | Construction | 2018 |