| ALM Contracts Limited | Construction | 2018 |
| Alpha Pipe Limited | Professional & scientific | 2024 |
| Alpha X Holding Ltd | Professional & scientific | 2026 |
| Alphatech Enterprises Ltd | Information & communication | 2025 |
| Alpine 2018 Ltd | Real estate | 2018 |
| Alpine Facilities Management Ltd | Wholesale & retail | 2020 |
| Altanama Studios Limited | Information & communication | 2025 |
| Alvee Properties Ltd | Real estate | 2021 |
| AM Asna Ltd | Wholesale & retail | 2018 |
| AM Hotels Ltd | Hospitality | 2024 |
| AM Tiling Scotland Ltd. | Construction | 2019 |
| Am-Pm Local Limited | Wholesale & retail | 2022 |
| Amanda Tandoori Grill Ltd | Hospitality | 2026 |
| Amazing Grace Music Ltd | Arts & recreation | 2023 |
| Amazing Love Care Limited | Administrative & support | 2023 |
| Ambassel Developments Ltd | Real estate | 2019 |
| Amber Childcare | | 2002 |
| AMBIT10N Limited | Other services | 2019 |
| Ambler Podiatry Limited | Health & social care | 2009 |
| AMD Investigation Services Ltd | Administrative & support | 2025 |
| Amenti Sportwear Limited | Wholesale & retail | 2021 |
| American Nails (PA) Limited | Other services | 2022 |
| Americana Film Ltd | Professional & scientific | 2026 |
| Amersham Homeware Limited | Wholesale & retail | 2017 |
| AMK Care Limited | Health & social care | 2016 |
| AMOCHRIE88 Ltd | Hospitality | 2025 |
| Amondi Ltd | Professional & scientific | 2025 |
| Ampm Depot Limited | Administrative & support | 2016 |
| AMR Paisley MOT Centre Ltd | Wholesale & retail | 2022 |
| AMT Structural Design Limited | Professional & scientific | 2024 |
| AND ORR Homes Ltd | Real estate | 2021 |
| Anderson Floor Warming Limited | Construction | 1998 |
| Andoura Golden Scissors Ltd | Other services | 2020 |
| Andrews Building Services Consulting Engineers Ltd | Professional & scientific | 2017 |
| Andrews-Weatherfoil (Scotland) Limited (80/745) | | 1968 |
| Andross (Scotland) Ltd | Construction | 2017 |
| Andy Carlton Golf Ltd | Arts & recreation | 2026 |
| Anemoi Energy Consulting Ltd | Professional & scientific | 2024 |
| Angelwax Limited | Manufacturing | 2010 |
| Angus (Asbestos Removal) Limited | Arts & recreation | 1989 |
| Animal Station Ltd | Wholesale & retail | 2019 |
| Anli Ltd | Real estate | 2025 |
| ANR Projects Consultancy Ltd | Construction | 2026 |
| Ansell Jones Marine Services Ltd. | Professional & scientific | 2007 |
| Antidote Booking Ltd | Arts & recreation | 2017 |
| Anzs Properties Ltd | Real estate | 2019 |
| Apekeurban Ltd | Wholesale & retail | 2026 |
| Apex Dental Care Paisley Ltd | Health & social care | 2025 |
| Apex Inspection Ltd | Other services | 2025 |
| Apex Tech Scotland Ltd | Wholesale & retail | 2006 |
| API Industries Limited | Information & communication | 2023 |
| Apollo Diesel Injection Ltd | Wholesale & retail | 2016 |
| AQ Retail Ltd | Wholesale & retail | 2019 |
| Aqua Energy | | 2003 |
| Aquarian Spring Media Ltd | Manufacturing | 2025 |
| Aquarius Crystals & Gifts Limited | Wholesale & retail | 2012 |
| AR Ralston Ltd | Health & social care | 2024 |
| Arabsco Limited | Wholesale & retail | 2018 |
| Arbat Haulpro Ltd | Transport & logistics | 2025 |
| Arbormaster Landscaping Limited | Administrative & support | 2017 |
| Archibald Graham Transport Limited | Transport & logistics | 2004 |
| Archistarchi Ltd | Professional & scientific | 2015 |
| Archive Store Co Limited | Administrative & support | 2016 |
| Arcufit Limited | Arts & recreation | 2023 |
| Arcus Decorating Limited | Construction | 2019 |
| Ardlea Properties Ltd | Real estate | 2024 |
| Ardleish Properties Ltd | Real estate | 2025 |
| Ardnagal Estates Ltd | Real estate | 2021 |
| Ardnagal Property Limited Partnership | | 2026 |
| Ardor Stream Ltd | Transport & logistics | 2025 |
| Arec Consulting Services Limited | Information & communication | 2023 |
| Areya Estates Ltd | Real estate | 2025 |
| Areya Offshore Ltd | Construction | 2023 |
| Argon Technical Ltd | Professional & scientific | 2018 |
| Argyll Land Limited | Construction | 2010 |
| Arimark Property Ltd | Real estate | 2025 |
| ARK Circles Ltd | Real estate | 2021 |
| ARK Engineering Solutions Ltd | Professional & scientific | 2011 |
| ARK Properties Ltd. | Real estate | 2007 |
| ARL Sameday Couriers Ltd. | Transport & logistics | 2016 |
| Arlwyo Ltd. | Hospitality | 2025 |
| Armadi Design Ltd | Professional & scientific | 2025 |
| Armour Clad Limited | Professional & scientific | 2013 |
| Armstrong Massage Therapy Ltd. | Health & social care | 2016 |
| Arora House Ltd | Real estate | 2025 |
| Arrah OUD Limited | Manufacturing | 2024 |
| Art Riot Studio Ltd | Arts & recreation | 2025 |
| Art Windows and Composite Doors Ltd | Professional & scientific | 2017 |
| Arthurlie Taxis Limited | Transport & logistics | 1995 |
| Artscape Gardens Limited | Agriculture & fishing | 2006 |
| Artwell Living Ltd | Construction | 2025 |
| Arěte Strength Ltd | Wholesale & retail | 2025 |
| AS 786 Limited | Hospitality | 2024 |
| AS Convenience Ltd | Wholesale & retail | 2014 |
| As-Scots Limited | Wholesale & retail | 2025 |
| Ascension Business Club Ltd | Professional & scientific | 2024 |
| Ascent Accounting Ltd | Professional & scientific | 2023 |
| Ascent Aviation Ltd | Arts & recreation | 2018 |
| Ascent Cyber Ltd | Information & communication | 2019 |
| Asclean Ltd | Administrative & support | 2025 |