| Aict GBP Real Estate (Curtain House) Limited Partnership | | 2021 |
| AIM Developments Limited | Construction | 1982 |
| Air Service Technicians Ltd | Manufacturing | 2025 |
| Airotech Limited | Professional & scientific | 2014 |
| AJD Digital (Scotland) Limited | Professional & scientific | 2020 |
| AJD Financial Services Ltd. | Financial services | 2009 |
| AJP Bradley (Perth) Ltd | Professional & scientific | 2025 |
| AJR Group Ltd | Real estate | 2025 |
| AJW Allure Healthcare Ltd | Health & social care | 2022 |
| Alagar Holdings Ltd | Wholesale & retail | 2025 |
| Alan Industries Ltd | Information & communication | 2026 |
| Alastair Reid Ltd | Wholesale & retail | 2013 |
| Alba Energy Limited | Administrative & support | 1998 |
| Alba Hotels Limited | Hospitality | 2003 |
| Alba Restaurants Limited | Hospitality | 2006 |
| Alder Archaeology Ltd | Arts & recreation | 2009 |
| Alebrije Group Ltd | Hospitality | 2025 |
| Alex M Express Ltd | Transport & logistics | 2026 |
| Alexander & Co Scotland Limited | Construction | 2005 |
| Alexander Simpson Limited | Agriculture & fishing | 1962 |
| Alexandra Food Ltd | Hospitality | 2025 |
| Alfa Doors Limited | Construction | 2015 |
| Alfa Fabrication Ltd | Extraterritorial | 2020 |
| Algo (Blairgowrie) Limited | Construction | 1996 |
| Algo Business Centre Limited | Real estate | 2005 |
| Ali.Scot GAS Limited | Construction | 2025 |
| Alison Kirk Bridal Limited | Extraterritorial | 2012 |
| ALL Renewable Energy Limited | Construction | 2010 |
| ALL Strong Scotland C.I.C. | Health & social care | 2018 |
| Allan Banu Roughcasting Ltd | Construction | 2026 |
| Allan Robertson & SON Ltd | Construction | 2013 |
| Allan's Services Construction Ltd | Manufacturing | 2022 |
| Allen Gordon LLP | | 2007 |
| Allen Scobie Consultancy Limited | Professional & scientific | 2021 |
| Allocate Wealth Management Ltd | Professional & scientific | 2020 |
| Allstar Solutions Ltd | Other services | 2014 |
| Allt Choille-Rais Hydro Ltd | Energy | 2014 |
| Allt Garbh Hydro Ltd | Energy | 2013 |
| Allt Goblach LLP | | 2012 |
| Almanar Security Ltd | Financial services | 2024 |
| Almond Bookkeeping Ltd | Professional & scientific | 2020 |
| Almond Ventures Ltd | Hospitality | 2022 |
| Almond VET Care Limited | Professional & scientific | 2025 |
| Almondbank Consultancy Ltd | Information & communication | 2021 |
| Almondinn Ltd | Hospitality | 2019 |
| Almondvalley Developments Limited | Construction | 1985 |
| Alpha Energy Trading GB Ltd | Extraterritorial | 2011 |
| Alpha for Trading Limited | Hospitality | 2018 |
| Alpine Cafe Ltd | Hospitality | 2024 |
| Alpine Enterprises Limited | Information & communication | 2004 |
| Alpine Performance Racing Ltd | Education | 2022 |
| Alyth & District Agricultural Show Society | Arts & recreation | 2015 |
| AM Group Scotland Ltd | Hospitality | 2025 |
| Amazeguide Limited | Administrative & support | 2023 |
| Amco Engineering Services Limited | Administrative & support | 2005 |
| AMG Consulting Services Limited | Information & communication | 2022 |
| AMH Consultants Limited | Information & communication | 2016 |
| AMI Motors 1 Ltd | Wholesale & retail | 2026 |
| AMI Stores Ltd | Wholesale & retail | 2016 |
| Amoha Jewellers Ltd | Manufacturing | 2024 |
| Ampera EV Scotland Limited | Wholesale & retail | 2026 |
| Anderson (Ccna) Properties Limited | Real estate | 2017 |
| Anderson Hotels Limited | Hospitality | 2000 |
| Anderson LE Beau Consulting Ltd | Administrative & support | 2025 |
| Andic Properties Ltd | Real estate | 2024 |
| Andrea Clean Ltd | Administrative & support | 2018 |
| Andrew Fenton Electrical Services Ltd | Construction | 2022 |
| Andrew Gallacher Cleaning Ltd | Administrative & support | 2019 |
| Andrew Gallacher Electrical Ltd | Construction | 2021 |
| Andrew LEE Photographer Ltd | Professional & scientific | 2024 |
| Andrew Skye Productions Limited | Manufacturing | 2022 |
| Andy Mitchell Contracts Limited | Transport & logistics | 2018 |
| Angell Eurosales Limited | Information & communication | 2020 |
| Angus Mackay Ltd | Professional & scientific | 2013 |
| Angus Watson Wealth Management Ltd | Professional & scientific | 2021 |
| Annandale Thirteen Ltd | Administrative & support | 2022 |
| Answer First Limited | Information & communication | 2025 |
| Aonach Wool Company Ltd | Wholesale & retail | 2026 |
| AP Cyber Security Ltd | Manufacturing | 2021 |
| Apartments Edinburgh Ltd | Real estate | 2003 |
| Apex Evolve Ltd | Financial services | 2025 |
| Apex Exterior Services Limited | Administrative & support | 2026 |
| Apex Renewable Engineering Ltd. | Professional & scientific | 2024 |
| Apex Security Consulting Ltd | Administrative & support | 2025 |
| Aphrodite Greek Restaurant Ltd | Hospitality | 2025 |
| Apni Shop Ltd | Wholesale & retail | 2021 |
| Apollos Consultancy Ltd | Professional & scientific | 2013 |
| Apple Tree Nursery (Perth) Limited | Education | 2016 |
| Appleyard Decorators Ltd | Construction | 2023 |
| Aqmz Ltd | Wholesale & retail | 2024 |
| Aquaeca Ltd | Administrative & support | 2022 |
| Aquatech (Scotland) Limited | Construction | 2023 |
| AR Industry Ltd | Construction | 2026 |
| Arach Ltd | Manufacturing | 2012 |
| Arataim Limited | Real estate | 1999 |
| Arberglen Limited | Health & social care | 1990 |
| Arboretum Internationale Limited | Agriculture & fishing | 1997 |
| ARC Marquees Limited | Other services | 2005 |
| Arch Homes Limited | Construction | 2003 |
| Area 59 Bikes Ltd | Wholesale & retail | 2019 |