| Aberdeen Journals Limited | Manufacturing | 1928 |
| Aberdeen Martial Arts Academy Ltd | Education | 2013 |
| Aberdeen PUB Company Limited | Hospitality | 2026 |
| Aberdeenshire Electrical Services Ltd. | Professional & scientific | 2013 |
| Aberdein Turbine Control Services Ltd | Professional & scientific | 2017 |
| Aberdour Inn Ltd | Hospitality | 2026 |
| Aberfoyle Childcare Services Limited | Health & social care | 2022 |
| Aberlemno Braes Limited | Real estate | 2006 |
| Abermuir Limited | Professional & scientific | 2011 |
| Abertay Cabs Limited | Transport & logistics | 2017 |
| Abertay Community Enterprises Limited | Extraterritorial | 2010 |
| Abertay Ethical Hackers CIC | Information & communication | 2026 |
| Abertay Holdings Ltd | Real estate | 2020 |
| Abertay Interiors Ltd. | Other services | 2001 |
| Abertay Plumbing, Heating & GAS Co. Ltd. | Construction | 1998 |
| Abertay Taxis Limited | Transport & logistics | 2011 |
| ABF Workspace Limited | Wholesale & retail | 2011 |
| ABI Trades Ltd | Construction | 2024 |
| Abiha Scotland Limited | Wholesale & retail | 2021 |
| Able Roller Shutters Ltd | Construction | 2012 |
| Ablehaus Ltd | Professional & scientific | 2024 |
| Ablo North Limited | Manufacturing | 2020 |
| About Planning Limited | Professional & scientific | 2020 |
| ABR Access Solutions Ltd | Construction | 2023 |
| Absm IT Services Limited | Information & communication | 2026 |
| Absolute Bathrooms and Ceramics Ltd | Other services | 2022 |
| Absolute Zenergy Ltd | Education | 2023 |
| Absw Consultants Ltd | Professional & scientific | 2014 |
| ABT Catering Ltd | Hospitality | 2025 |
| Abule Tiwa Ltd | Hospitality | 2023 |
| Abuz Food Limited | Hospitality | 2013 |
| ABY Short Lets Ltd | Hospitality | 2025 |
| AC Couriers (Dundee) Ltd | Transport & logistics | 2017 |
| AC Digital Media Service Ltd | Professional & scientific | 2022 |
| AC Fish Merchants Ltd | Wholesale & retail | 2025 |
| ACA Flooring Ltd | Wholesale & retail | 2025 |
| Acanthus Online Ltd. | Wholesale & retail | 2014 |
| Accel Business LLP | | 2010 |
| Accel Business Services Limited | Professional & scientific | 2014 |
| Acceladus Holdings Ltd | Financial services | 2025 |
| Access Apartments Ltd | Hospitality | 2019 |
| Access Cabs Limited | Transport & logistics | 2010 |
| Access the North Ltd | Construction | 2017 |
| Accessorise @ Millars Limited | Wholesale & retail | 2018 |
| Accord EYE Care Ltd | Health & social care | 2024 |
| Accounting Services Dundee Limited | Professional & scientific | 2009 |
| Accounting Services Kellas Limited | Professional & scientific | 2019 |
| Ace Agritec Limited | Manufacturing | 2017 |
| Ace Alloy Repairs Limited | Wholesale & retail | 2025 |
| Ace Aquatec Limited | Manufacturing | 2007 |
| Ace Aquatec Solutions Ltd | Manufacturing | 2015 |
| Ace Beauty & Cosmetic Academy Ltd | Wholesale & retail | 2017 |
| Ace Cabs Dundee Limited | Transport & logistics | 2022 |
| Ace Community Events CIC | Arts & recreation | 2024 |
| Ace Custom Coatings Limited | Manufacturing | 2026 |
| Ace MOT Garage Limited | Wholesale & retail | 2007 |
| Ace Work Gear Limited | Wholesale & retail | 2009 |
| Aceautocare Ltd | Administrative & support | 2024 |
| ACH Well Services Ltd | Construction | 2019 |
| Achlip Limited | Real estate | 1975 |
| Achron Engineering Solutions Limited | Other services | 2016 |
| ACL East Limited | Real estate | 2016 |
| Acopolis Ltd | Real estate | 2018 |
| Acoustic & Fire Door Solutions Ltd | Wholesale & retail | 2010 |
| Acquire-X Limited | Manufacturing | 2024 |
| ACT Property Leasing Ltd | Real estate | 2021 |
| Action Resource Management Limited | Professional & scientific | 2014 |
| Activate Engagement Limited | Administrative & support | 2016 |
| Active First AID Scotland Limited | Health & social care | 2023 |
| Active Health Dundee Ltd | Health & social care | 2020 |
| Active Life Physio Limited | Health & social care | 2025 |
| Activesupp Ltd | Wholesale & retail | 2023 |
| Acumenpro Ltd | Real estate | 2012 |
| Acuvent Engineering Group Ltd | Manufacturing | 2016 |
| Acuvent Holdings Limited | Financial services | 2018 |
| ACW Product and Test Services Ltd | Professional & scientific | 2021 |
| AD Carpet Cleaning Limited | Administrative & support | 2019 |
| Ad-Loc Engineering Ltd | Professional & scientific | 2015 |
| Adahjon Design Ltd | Wholesale & retail | 2025 |
| Adam Handling Limited | Hospitality | 2014 |
| Adam Taxis 1 Ltd | Transport & logistics | 2025 |
| Adam Taxis Ltd | Transport & logistics | 2017 |
| Adamson Fabrications (Dundee) Limited | Manufacturing | 1949 |
| Addex Hommes Ltd | Real estate | 2025 |
| Addex Resource Limited | Administrative & support | 2023 |
| Addison & Co Property Limited | Real estate | 2026 |
| ADE Property Holdings Ltd | Real estate | 2025 |
| Adeforyou Ltd | Real estate | 2025 |
| Adenstone Limited | Wholesale & retail | 1998 |
| Adeo Scotland Ltd | Information & communication | 2008 |
| Adfix Sign Holding Ltd | Manufacturing | 2018 |
| ADG Couriers Ltd | Transport & logistics | 2024 |
| ADH3 Theatre Ltd | Arts & recreation | 2025 |
| ADL Plastering Limited | Construction | 2022 |
| Admin Logistics LP | | 2017 |
| ADN Steel Erection Limited | Construction | 2020 |
| Adrel Holdings Limited | Administrative & support | 2005 |
| ADS Painters Limited | Construction | 2024 |
| Advanced Care Services Limited | Health & social care | 2004 |
| Advanced Property Letting Limited | Real estate | 2017 |