| 102 Holdings Ltd | Transport & logistics | 2026 |
| 121MARKETINGSERVICES Ltd | Wholesale & retail | 2022 |
| 123ABC UK Limited | Wholesale & retail | 2011 |
| 1718 Ltd | Manufacturing | 2018 |
| 1J Improve Your Home Ltd | Construction | 2022 |
| 20 Watt Solutions Limited | Professional & scientific | 2019 |
| 2020BLACK Ltd | Wholesale & retail | 2023 |
| 21 Kitchen Design Ltd | Wholesale & retail | 2020 |
| 247 Property Letting Kilmarnock Ltd. | Real estate | 2008 |
| 2K Aviation Services Ltd | Manufacturing | 2021 |
| 360 Technology Ltd | Information & communication | 2019 |
| 3CORNERBESTONESTORE Limited | Wholesale & retail | 2017 |
| 3GOR Limited | Administrative & support | 2024 |
| 4DEVELOPMENT.NET Hosting Ltd | Information & communication | 2025 |
| 4TH Partner Limited | Information & communication | 2025 |
| 7FN Group Ltd | Hospitality | 2020 |
| A & B Properties Scotland Limited | Real estate | 2024 |
| A & C New Electrical Limited | Construction | 2014 |
| A & C New Properties Limited | Construction | 2019 |
| A & D Trading (Troon) Ltd | Hospitality | 2024 |
| A & G Construction Scotland Ltd | Construction | 2011 |
| A & L Mechanical Installations Ltd. | Construction | 2003 |
| A & M Bross Ltd | Arts & recreation | 2019 |
| A & W Steel Limited | Agriculture & fishing | 2009 |
| A 1 Glass Company Limited | Construction | 1973 |
| A and H Dick Limited | Construction | 2014 |
| A and H Dick Plant Ltd | Administrative & support | 2024 |
| A Clark & SON Plumbing and Heating Ltd | Construction | 2026 |
| A CUT Above Limited | Other services | 2019 |
| A G Finance (Scotland) Limited | Financial services | 2005 |
| A Gray Consultancy Limited | Professional & scientific | 2025 |
| A H Marine Ltd | Construction | 2006 |
| A J Shortlees Ltd | Wholesale & retail | 2024 |
| A L Plumbing & Heating (Scotland) Limited | Extraterritorial | 2009 |
| A L Plumbing & Heating Limited | Construction | 2001 |
| A R Clotworthy Performance Ltd | Wholesale & retail | 2017 |
| A T Mcgarrity Limited | Wholesale & retail | 2008 |
| A&B SQE Limited | Professional & scientific | 2017 |
| A.D.Dewar Properties Ltd | Households | 2025 |
| A.J. International Consultancy Limited | Professional & scientific | 2013 |
| A.N.C. Services (Scotland) Ltd | Agriculture & fishing | 2025 |
| A.S.H. Leasings Limited | Real estate | 2002 |
| A.S.K Electrical Ayrshire Limited | Construction | 2017 |
| A1 Collision (UK) Limited | Wholesale & retail | 2003 |
| A2B Travelling Ltd | Transport & logistics | 2025 |
| A60 Marine Spares Ltd | Manufacturing | 2017 |
| AA Healthcare Ltd | Wholesale & retail | 2018 |
| AAF Carwash Ltd | Administrative & support | 2024 |
| Aapd Limited | Information & communication | 2008 |
| AB Movements Ltd | Transport & logistics | 2026 |
| Abacus Angels Ltd | Professional & scientific | 2026 |
| ABC Dairy Ltd | Administrative & support | 2011 |
| Abercorn Dairies Ltd. | Wholesale & retail | 2006 |
| Aberdeen Civil Engineering Ltd | Construction | 2016 |
| Aberdeen Contractors Ltd | Administrative & support | 2018 |
| Aberdeen Marine Ltd | Professional & scientific | 2016 |
| Aberville (Scotland) Limited | Real estate | 2015 |
| ABG Management Services Ltd | Construction | 2018 |
| ABM Machine Tool Services Ltd | Manufacturing | 2018 |
| Above Ground Bar Ltd | Hospitality | 2025 |
| Acair Marine Ltd | Professional & scientific | 2018 |
| Ace Repairs Limited | Manufacturing | 2007 |
| Ace Vulcanising & Lining Solutions Ltd | Manufacturing | 2018 |
| ACF Furniture Ltd | Other services | 2021 |
| Acoa Healthcare Limited | Health & social care | 2020 |
| ACS Select Group Ltd | Construction | 2019 |
| Acsg Ltd | Extraterritorial | 2025 |
| Acsl Services Ltd | Professional & scientific | 2026 |
| Active Office Scotland Limited | Information & communication | 1966 |
| ACZ Solutions Ltd | Wholesale & retail | 2014 |
| Ad&Co Media Ltd | Professional & scientific | 2019 |
| Adam O'Donnell Ltd | Wholesale & retail | 2022 |
| Adamhill Properties Limited | Real estate | 2022 |
| Adams & Jamieson Secure Medical Solutions Ltd | Health & social care | 2022 |
| Adamson Lynch Limited | Construction | 2019 |
| Adaptive Construction Ltd | Construction | 2018 |
| ADC Decor Ltd | Construction | 2021 |
| ADC Global Projects Ltd. | Information & communication | 2016 |
| Addacabin Limited | Manufacturing | 2019 |
| Adhol Property Ltd | Real estate | 2025 |
| Advance GAS Limited | Construction | 2016 |
| Advance Secured Solutions Scot Ltd | Professional & scientific | 2026 |
| Advanced Dental Equipment Ltd | Administrative & support | 2018 |
| Advanced Estimating Services Ltd | Professional & scientific | 2020 |
| Advanced Roof Solutions Ayrshire Limited | Construction | 2022 |
| AEC Networks Ltd | Information & communication | 2018 |
| Aedm Properties Limited | Real estate | 2025 |
| Aegas Data Systems Limited | Information & communication | 2025 |
| Aegis Limited | Information & communication | 2015 |
| Aesthetics Ayrshire Ltd | Other services | 2019 |
| Aesthetics by NRB Limited | Health & social care | 2022 |
| Aesthetics by Sandra Limited | Other services | 2025 |
| AF Vehicle Repairs Ltd | Wholesale & retail | 2026 |
| Affleck Property Services Ltd | Real estate | 2024 |
| Africa Gateway Ltd | Wholesale & retail | 2020 |
| Afrilingua Rise CIC | Education | 2025 |
| Afsavia Ltd | Professional & scientific | 2019 |
| Afur Limited | Information & communication | 2015 |
| AG Holdings (Ayrshire) Ltd | Real estate | 2026 |
| AG Motorsport Ltd | Wholesale & retail | 2006 |