| A&L Porter Investments Ltd | Real estate | 2014 |
| A&M Smith Skip Hire Limited | Professional & scientific | 2016 |
| A&O Barbers Ltd | Other services | 2022 |
| A&P Events Ltd | Arts & recreation | 2025 |
| A&S Catering Private Ltd | Hospitality | 2026 |
| A&S Services Aberdeen Limited | Administrative & support | 2024 |
| A&T Global Property Ltd | Real estate | 2023 |
| A-Fab Manhire Limited Partnership | | 1996 |
| A-Louis Installations & Joinery Limited | Construction | 2021 |
| A-Town Ltd | Real estate | 2025 |
| A. a. Marine&Subsea Ltd | Mining & quarrying | 2024 |
| A. SIM Design Limited | Professional & scientific | 2012 |
| A.C. Morrison & Richards LLP | | 2015 |
| A.D.I Builders Ltd | Construction | 2018 |
| A.E.L. (Aberdeen) Limited | Wholesale & retail | 1981 |
| A.Findlay Engineering Ltd | Construction | 2023 |
| A.G. Accounting Limited | Professional & scientific | 2002 |
| A.G. Contractors Limited | Construction | 2002 |
| A.G.Integrity Services Ltd | Professional & scientific | 2018 |
| A.J. Adams Consultancy Ltd | Professional & scientific | 2021 |
| A.J. Croll & Company Ltd. | Professional & scientific | 2026 |
| A.J. Executive Investments Limited | Administrative & support | 1980 |
| A.J.B.R.A. Limited | Mining & quarrying | 2020 |
| A.J.P.R. Engineering Limited | Professional & scientific | 2001 |
| A.K.A. Hair Tools Limited | Other services | 2006 |
| A.L.P.S. Engineering Company Limited | Manufacturing | 1994 |
| A.M. Specialist Skin Therapies & Beauty Training Academy Ltd | Other services | 2021 |
| A.M.A. 24 Ltd | Wholesale & retail | 2016 |
| A.R.C Resources Ltd | Manufacturing | 2024 |
| A.R.F Joinery Limited | Construction | 2014 |
| A.W. Herd & Sons Limited | Wholesale & retail | 1949 |
| A.Y.C. Housing Ltd. | Real estate | 2015 |
| A1 Access (NE) Limited | Administrative & support | 2019 |
| A1 Access (Scotland) Limited | Administrative & support | 2021 |
| A1 Competitions Limited | Arts & recreation | 2026 |
| A1 Fight Gear Ltd | Wholesale & retail | 2016 |
| A1 Typeserve Limited | Administrative & support | 1984 |
| A10GROUP Ltd | Information & communication | 2024 |
| A19 Ltd. | Wholesale & retail | 2014 |
| A19 Stores Ltd. | Wholesale & retail | 2011 |
| A2 and B Limited | Professional & scientific | 2023 |
| A2 Laundry Limited | Other services | 2016 |
| A224 INK & Glam Ltd | Other services | 2025 |
| A2BCONTAINERS Ltd | Administrative & support | 2016 |
| A2E Integrated Services Limited | Professional & scientific | 2017 |
| A2M Financial & Estate Planning Ltd | Financial services | 2015 |
| A2P Solutions Ltd | Professional & scientific | 2025 |
| A2Z Accounting Solutions Limited | Professional & scientific | 2019 |
| A2Z Immigration Solutions Limited | Professional & scientific | 2020 |
| A2Z Removals Limited | Transport & logistics | 2026 |
| A2Z Smart Business Limited | Real estate | 2023 |
| A302 Limited | Construction | 2025 |
| A4DABLE Limited | Professional & scientific | 2021 |
| A4RODEEN Ltd | Arts & recreation | 2025 |
| A9 Kerala Food Ltd | Hospitality | 2020 |
| AA Contracting Solutions Ltd | Administrative & support | 2025 |
| AA Kumar Services Limited | Health & social care | 2019 |
| AA Training and Consultancy Ltd | Professional & scientific | 2025 |
| AAA Carpetcare Ltd | Administrative & support | 2015 |
| AAA Properties Aberdeen Ltd | Real estate | 2020 |
| AAA Scaffolding UK Limited | Construction | 2022 |
| Aaabpr Property Renovations Ltd | Construction | 2022 |
| AAB Audit Limited | Professional & scientific | 2021 |
| AAB Business & Tax Advisory LLP | | 2007 |
| AAB Business Advisory Limited | Professional & scientific | 2021 |
| AAB Business Services Limited | Professional & scientific | 2021 |
| AAB Corporate Finance Limited | Professional & scientific | 2021 |
| AAB Employer Solutions LLP | | 2007 |
| AAB Global Mobility Limited | Professional & scientific | 2021 |
| AAB JV Audit Limited | Professional & scientific | 2024 |
| AAB Nominee Company Limited | Professional & scientific | 2010 |
| AAB Payroll Limited | Professional & scientific | 2021 |
| AAB People Consulting Limited | Administrative & support | 2014 |
| AAB People Limited | Professional & scientific | 2025 |
| AAB Professional Services Limited | Real estate | 2021 |
| AAB Tax Limited | Professional & scientific | 2021 |
| AAB Trustee Company Limited | Professional & scientific | 2013 |
| AAB Virtual Finance Limited | Financial services | 2016 |
| AAB Wealth Limited | Financial services | 2010 |
| Aadhantamil Ltd | Hospitality | 2024 |
| Aadhav Green UK Limited | Professional & scientific | 2025 |
| Aalln Ltd | Health & social care | 2020 |
| Aaltae Care Solutionq Ltd | Health & social care | 2023 |
| Aaron West Incorporated Limited | Administrative & support | 2013 |
| Aashika Ltd | Information & communication | 2016 |
| AB Anaesthesia Alternatives Ltd | Health & social care | 2019 |
| AB Car Valeting Ltd | Administrative & support | 2022 |
| AB Consortium Ltd | Hospitality | 2023 |
| AB Consult International Ltd | Professional & scientific | 2025 |
| AB Cromdale Limited | Real estate | 2011 |
| AB Holdings (Scotland) Ltd | Professional & scientific | 2024 |
| AB Homes (Scotland) Ltd | Real estate | 2026 |
| AB Mixology Limited | Hospitality | 2006 |
| AB Overlook Limited | Real estate | 2025 |
| AB Padma Ltd | Hospitality | 2025 |
| AB Realisations Limited | Mining & quarrying | 2003 |
| AB Serviceline Ltd | Transport & logistics | 2020 |
| AB Surveys Ltd | Other services | 2012 |
| AB Transfer Ltd | Transport & logistics | 2013 |
| AB Virtue Ltd | Professional & scientific | 2021 |