| Advanced Storage Systems Limited | Other services | 2011 |
| Advanced Training Solutions (Scotland) Ltd | Education | 2020 |
| Adventure Sprout Ltd | Information & communication | 2025 |
| ADZ Takeaway Ltd | Hospitality | 2020 |
| Aeolos Systems Ltd | Professional & scientific | 2019 |
| Aesm Holdings Limited | Real estate | 2025 |
| Aesthete Beauty Ltd | Other services | 2023 |
| Aesthetique Beauty Training (Scotland) Ltd | Education | 2016 |
| Aezi Ltd | Transport & logistics | 2026 |
| AF Electrical Access Ltd | Construction | 2017 |
| AF Energy Ltd | Construction | 2024 |
| Afantastic.Game Ltd | Information & communication | 2025 |
| Affertons Limited | Other services | 2010 |
| Affinity Property Management Limited | Real estate | 2012 |
| Affivo Finance Limited | Information & communication | 2024 |
| Affordable Autos (Glasgow) Ltd | Wholesale & retail | 2019 |
| Afghan Traders Edinburgh Ltd | Wholesale & retail | 2025 |
| AFM Property Maintenance (Tayside) Ltd. | Construction | 2014 |
| AFM Property Management Limited | Real estate | 2019 |
| AFM Solutions Limited | Professional & scientific | 2014 |
| Afridi Consultants Ltd | Financial services | 2026 |
| Afridi Properties & Lettings Ltd | Real estate | 2026 |
| AFS Scaffolding Ltd | Construction | 2017 |
| Aftermath Tattoo Ltd | Health & social care | 2025 |
| AG Electric (Scotland) Ltd | Construction | 2019 |
| Against the Head Limited | Financial services | 2014 |
| AGB1 Ltd | Professional & scientific | 2026 |
| AGC Engineering Scotland Ltd | Construction | 2026 |
| AGD (Kirriemuir) Limited | Construction | 2015 |
| Agency of None Ltd | Information & communication | 2017 |
| Agentround Group Limited | Wholesale & retail | 1991 |
| Ageo Property Limited | Real estate | 2022 |
| Agilis Legal Ltd | Professional & scientific | 2018 |
| AGL Support Services Ltd | Construction | 2016 |
| AGM Forbes Limited | Agriculture & fishing | 2018 |
| AGM Impex LP | | 2016 |
| Agon International Limited | Professional & scientific | 2018 |
| Agonyin Palace Limited | Hospitality | 2026 |
| AGR Properties Scotland Ltd | Households | 2023 |
| Agre Finance LP | | 2015 |
| Agri Data Systems Limited | Information & communication | 2020 |
| Agricarbon UK Limited | Professional & scientific | 2018 |
| Agricore Machines Ltd | Wholesale & retail | 2025 |
| Agrobrand L.P. | | 2014 |
| Agroexpert L.P. | | 2014 |
| Agrotrade Solutions LP | | 2017 |
| Agse 5 Limited | Health & social care | 2018 |
| AGT Scaffolding Ltd | Construction | 2017 |
| AH (Coastal Cottage) Limited | Real estate | 2026 |
| AH (Flemings Yard) Limited | Hospitality | 2026 |
| AH (Nautilus) Limited | Real estate | 2026 |
| AH (Old Paint Shop) Limited | Real estate | 2026 |
| AH (Seaview) Limited | Real estate | 2026 |
| AH (Shorefront) Limited | Real estate | 2026 |
| AH (the Howff) Limited | Real estate | 2026 |
| AH (the Loft) Limited | Real estate | 2026 |
| AH Fastfood Ltd | Hospitality | 2025 |
| AH Fitness Limited | Arts & recreation | 2021 |
| Ah&Co Scotland Ltd | Wholesale & retail | 2026 |
| AHC (Scotland) Ltd | Construction | 2016 |
| Ahilmovers Limited | Transport & logistics | 2025 |
| AHK Scotland Ltd | Real estate | 2024 |
| Ahmed Orthopaedic Services Limited | Health & social care | 2018 |
| Ahuuu Ltd | Transport & logistics | 2025 |
| AI Gear Ltd | Wholesale & retail | 2019 |
| AI Gear Properties Ltd | Real estate | 2025 |
| AI Offices Agency Ltd | Information & communication | 2026 |
| AI Property Scot Ltd | Real estate | 2025 |
| AI Robot Kitchen Ltd | Hospitality | 2026 |
| Ai-Mz Tech Ltd | Information & communication | 2025 |
| Aidsun Holdings Limited | Financial services | 2005 |
| Aigars Bridins Photography Limited | Extraterritorial | 2022 |
| Ailsa Hotels Limited | Construction | 2003 |
| AIM Design Studio Limited | Professional & scientific | 2012 |
| AIM Property 23 Limited | Real estate | 2023 |
| Aimer Property Ltd | Real estate | 2020 |
| Aimers Coffee and Tea Ltd | Manufacturing | 2003 |
| Aimwood Property Limited | Real estate | 2015 |
| Air Service Training (Engineering) Limited | Education | 1996 |
| Airfox Transport L.P. | | 2015 |
| Airgonomics Consultancy Limited | Administrative & support | 2025 |
| Airlie Arms & Sons Ltd | Hospitality | 2024 |
| Airlie Green 'LOW Energy' Homes SPV Ltd | Construction | 2016 |
| Airlie Property Group Ltd | Real estate | 2026 |
| Airlie Street Investments Limited | Hospitality | 2012 |
| Airlie Street Properties Limited | Hospitality | 2013 |
| Airts & Pairts Limited | Administrative & support | 2025 |
| Airwest Alliance L.P. | | 2015 |
| Airwood Trading L.P. | | 2015 |
| AIS Hussain Limited | Real estate | 2024 |
| AJ Fibre Surveys Limited | Information & communication | 2024 |
| AJ Holdings Fife Limited | Financial services | 2026 |
| Ajaydelivers Ltd | Other services | 2025 |
| Ajfitchet Architect LLP | | 2012 |
| Ajgf Autos Limited | Wholesale & retail | 2026 |
| AJL (Broughty Ferry) Limited | Health & social care | 2010 |
| Ajla Properties Ltd | Real estate | 2025 |
| AJM Teaching and Consulting Ltd | Professional & scientific | 2024 |
| AJS Contracts (Scotland) Limited | Professional & scientific | 2011 |
| Ajt&L Marketing Ltd | Professional & scientific | 2017 |