| ANS Cleaning Ltd | Administrative & support | 2023 |
| ANS Energy Ventures Limited | Mining & quarrying | 2003 |
| ANS Holdings Limited | Hospitality | 2016 |
| Ansa Data Analytics Limited | Administrative & support | 2020 |
| Ansari Investments Ltd | Information & communication | 2020 |
| Ansari IT Ltd | Information & communication | 2013 |
| Ansari Telecom Ltd | Information & communication | 2018 |
| Ansco (UK) Limited | Administrative & support | 2006 |
| Anspro Ltd | Professional & scientific | 2018 |
| Antalet Talare LP | | 2013 |
| Anthracite Ltd | Professional & scientific | 2026 |
| Antique Cafe Ltd | Hospitality | 2023 |
| Antique Retail Ltd | Other services | 2025 |
| Antwerpen Trend LP | | 2014 |
| ANV Engineering Ltd | Professional & scientific | 2011 |
| ANV Trading Ltd | Manufacturing | 2025 |
| Anvil Estates Limited | Real estate | 2003 |
| Anzest Limited | Professional & scientific | 2014 |
| AOA Innovations Ltd | Wholesale & retail | 2025 |
| AOB Subsea Ltd | Professional & scientific | 2020 |
| AOC International Limited | Extraterritorial | 1976 |
| Aodentz Ltd | Real estate | 2025 |
| AOE Windfarm Limited | Energy | 2011 |
| Aoss Limited | Wholesale & retail | 2017 |
| AP & Developments Limited | Construction | 2021 |
| AP Baleine 3 Holdings Limited | Financial services | 2026 |
| AP Baleine 3 UK Limited | Administrative & support | 2026 |
| AP Prime Tech Ltd | Manufacturing | 2025 |
| AP Taxi and Tours Ltd | Transport & logistics | 2026 |
| APA Training Limited | Other services | 2019 |
| Apadus Ltd | Information & communication | 2023 |
| Apardion Consulting Limited | Professional & scientific | 2019 |
| Apardion Limited | Administrative & support | 1998 |
| Apartment a Aberdeen Ltd | Hospitality | 2023 |
| Apartment B Aberdeen Ltd | Hospitality | 2023 |
| Apartment C Aberdeen Ltd | Hospitality | 2023 |
| Apartment D Aberdeen Ltd | Hospitality | 2023 |
| Apartment E Aberdeen Ltd | Hospitality | 2023 |
| Apartment F Aberdeen Ltd | Hospitality | 2023 |
| Apecem Ltd | Wholesale & retail | 2022 |
| Apex Accountancy Solutions Ltd | Professional & scientific | 2022 |
| Apex Agility Limited | Extraterritorial | 2012 |
| Apex Exercise Ltd | Wholesale & retail | 2025 |
| Apex Flowfit Ltd | Other services | 2026 |
| Apex Horizon Solutions Ltd | Professional & scientific | 2026 |
| Apex Industrial Chemicals Limited | Manufacturing | 1985 |
| Apex Lantern Ltd | Wholesale & retail | 2019 |
| Apex Leisure Collective Ltd | Arts & recreation | 2026 |
| Apex Movement Limited | Health & social care | 2026 |
| Apex Property Services Aberdeen Limited | Administrative & support | 2019 |
| Apextalant.Co.Uk Limited | Administrative & support | 2024 |
| Aphrodite Restaurant Ltd | Hospitality | 2024 |
| APL Aberdeen Ltd | Construction | 2018 |
| Apollo Engineering Consultants Limited | Professional & scientific | 2010 |
| Apollo Offshore Engineering Limited | Administrative & support | 2022 |
| Apostate Ltd | Wholesale & retail | 2025 |
| App Survey Solutions Ltd | Professional & scientific | 2023 |
| Appetite for Business Ltd | Information & communication | 2016 |
| Appleby Avenue Limited | Wholesale & retail | 2022 |
| Appleheart Services Ltd | Financial services | 2024 |
| Applexus Limited | Information & communication | 1991 |
| Applied Health Informatics Limited | Information & communication | 2020 |
| Applied Research North Limited | Professional & scientific | 2025 |
| Apply Accounting Ltd | Professional & scientific | 2024 |
| Apps Property Letting Ltd | Real estate | 2026 |
| Appscot Limited | Information & communication | 2025 |
| Appweb Ltd | Administrative & support | 2016 |
| Aprojen Ltd | Professional & scientific | 2015 |
| Aptitude Business Consulting Limited | Professional & scientific | 2015 |
| Aptitude Financial Solutions Limited | Professional & scientific | 2025 |
| Aptus Technical Solutions Limited | Manufacturing | 2022 |
| Apulseconnect Ltd | Professional & scientific | 2024 |
| APV Property Management (Scotland) Limited | Real estate | 2023 |
| AQ Surgical Ltd | Health & social care | 2015 |
| Aqua Ecosse Ltd | Administrative & support | 2020 |
| Aqua Food Services Ltd | Hospitality | 2024 |
| Aqua Inspired Engineering Limited | Professional & scientific | 2024 |
| Aqua Power Services Limited | Construction | 2017 |
| Aquagirl Ltd | Other services | 2026 |
| Aqualux Car Wash Limited | Other services | 2025 |
| Aquarius Fishing Enterprises LLP | | 2018 |
| Aquarius I&T Limited Liability Partnership | | 2009 |
| Aquarius Offshore Ltd | Extraterritorial | 2021 |
| Aquarius Project Marine Solutions Ltd | Extraterritorial | 2021 |
| Aquasign EOT Trustees Limited | Financial services | 2021 |
| Aquasign Limited | Manufacturing | 2015 |
| Aquaspection Limited | Administrative & support | 2001 |
| Aquatera Holdings Limited | Professional & scientific | 2022 |
| Aquaterra (Group) Limited | Administrative & support | 2004 |
| Aquaterra Equipment Limited | Administrative & support | 2012 |
| Aquaterra Group (Holdings) Limited | Administrative & support | 2013 |
| Aquaterra Integrated Services Limited | Administrative & support | 2023 |
| Aquaterra International Group Limited | Administrative & support | 2019 |
| Aquaterra Solutions Limited | Administrative & support | 2013 |
| Aquaterra Training Limited | Administrative & support | 2008 |
| Aquaterra Ventures Limited | Professional & scientific | 2011 |
| Aquaticsoul Bathrooms Limited | Construction | 2010 |
| Aquidata XL Consultancy Limited | Information & communication | 2026 |
| Aquila Marketing Agency Limited | Professional & scientific | 2025 |
| Aqura Systems Limited | Manufacturing | 2025 |