| Alan Fraser Metal Fabrications Ltd | Manufacturing | 2011 |
| Alan Reid Joinery Services Limited | Construction | 2006 |
| Alan Stables Ltd | Financial services | 2021 |
| Alan Twatt (Potatoes) Limited | Agriculture & fishing | 1976 |
| Alan Twatt Potato Merchants Limited | Administrative & support | 1979 |
| Alana Forrest Limited | Administrative & support | 2020 |
| Alarm Maintenance Company Limited | Professional & scientific | 2001 |
| Alas Outsourcing Limited | Information & communication | 2025 |
| Alasdair Anderson Property Investment Ltd | Real estate | 2025 |
| Alba Estates Limited | Real estate | 2003 |
| Alba Gaskets Limited | Mining & quarrying | 2007 |
| Albagates (International) Limited | Administrative & support | 2002 |
| Albany Technical Services Limited | Professional & scientific | 2012 |
| Albert Realisations Limited | Other services | 2020 |
| Albert Street Business Centre Limited | Real estate | 2021 |
| Albert XIV Limited | Professional & scientific | 2019 |
| Albolter Limited | Professional & scientific | 2024 |
| Albyn Design & Build Ltd | Construction | 2016 |
| Albyn Garage (Aberdeen) Limited | Wholesale & retail | 2012 |
| Albyn Group Ltd | Professional & scientific | 2017 |
| Albyn Leisure Ltd | Hospitality | 2019 |
| Albyn Residences Limited | Real estate | 2022 |
| Albyn School Limited | Other services | 1948 |
| ALC2020 LLP | | 2019 |
| Alceli Limited | Manufacturing | 2016 |
| Alchemy Oilfield Services Limited | Manufacturing | 2005 |
| Alcore Construction Limited | Administrative & support | 2009 |
| Alcore Construction North East Limited | Construction | 2015 |
| Aldama CAD Services Limited | Professional & scientific | 2008 |
| Aldebays Limited | Administrative & support | 2025 |
| Alden Group Limited | Wholesale & retail | 2025 |
| Aldo Group Limited | Administrative & support | 2019 |
| Aleks Couriers Ltd | Transport & logistics | 2026 |
| Aleksandra Spala Ltd | Wholesale & retail | 2013 |
| Alessiatrans Ltd | Transport & logistics | 2025 |
| Aletheon Ltd | Professional & scientific | 2025 |
| Alevld Limited | Transport & logistics | 2024 |
| Alex Adamson & SON Limited | Mining & quarrying | 2011 |
| Alex Hutcheon & Company (FS) Ltd | Extraterritorial | 2013 |
| Alex Hutcheon and Company Limited | Professional & scientific | 2021 |
| Alex Mario Trans Ltd | Transport & logistics | 2023 |
| Alex Pirie & Sons Limited | | 1898 |
| Alex Shand and Aberdeen City Council | | 2000 |
| Alex Stef Ltd | Transport & logistics | 2016 |
| Alex Timber Ltd | Wholesale & retail | 2025 |
| Alex's Value PCS Ltd | Wholesale & retail | 2024 |
| Alexa Food Ltd | Hospitality | 2019 |
| Alexander Law (Slaters) Limited | Construction | 1999 |
| Alexander Murray & Co Limited | Professional & scientific | 2010 |
| Alexander Ross & Sons (Sand and Gravel) Limited | Mining & quarrying | 1964 |
| Alexander Thomas Brown, MRS Lynn Margaret Brown and Aberdeen City Council | | 2001 |
| Alexanders (Rosemount) Limited | Wholesale & retail | 1997 |
| Alexandra Riddell Music Limited | Information & communication | 2025 |
| Alexsani Ltd | Administrative & support | 2018 |
| Alford Great Wall Limited | Hospitality | 2024 |
| Alfordz International Ltd | Education | 2026 |
| Algoa Engineering Services Limited | Professional & scientific | 1997 |
| Algon Medical Limited | Health & social care | 2010 |
| Algra Plumbing & Heating Ltd. | Construction | 2007 |
| Alhomsi Mechanic Ltd | Wholesale & retail | 2025 |
| Alice Hughes Veterinary Equine Dental Care Ltd | Professional & scientific | 2025 |
| Alick Nicol Limited | Agriculture & fishing | 2003 |
| Alico Invest Limited | Real estate | 2010 |
| Alicydon Limited | Real estate | 2019 |
| Align Aesthetics Limited | Health & social care | 2025 |
| Alion Engineering Solutions Ltd | Mining & quarrying | 2015 |
| ALL Access Rigging Ltd | Professional & scientific | 2015 |
| ALL Leisure Limited | Hospitality | 1990 |
| ALL Oceans Engineering Limited | Other services | 1985 |
| ALL Seasons Garden Maintenance (Aberdeen) Ltd | Administrative & support | 2025 |
| ALL Star PUB Group Ltd | Hospitality | 2025 |
| ALL Timberlines Limited | Manufacturing | 1982 |
| ALL Tomorrows' Parties Ltd | Wholesale & retail | 2020 |
| Alladent Services Limited | Health & social care | 2008 |
| Allan and DEY Limited | Wholesale & retail | 1944 |
| Allan Food Supplies Limited | Real estate | 2008 |
| Allan Fraser Engineering Ltd | Mining & quarrying | 2023 |
| Allan John Barclay Ltd | Wholesale & retail | 2014 |
| Allan Smith Designs Ltd | Manufacturing | 2021 |
| Allardyce Design Limited | Professional & scientific | 2016 |
| Alledo Inter LP | | 2012 |
| Allen Cowe Builders (Skye) Limited | Construction | 2011 |
| Allied Energies Limited | Energy | 2020 |
| Allied Purchasing Services Limited | Professional & scientific | 1995 |
| Allied Stevedores Limited | Professional & scientific | 2003 |
| Allied Training Services Ltd | Extraterritorial | 2019 |
| Allocation Engineering Limited | Information & communication | 2010 |
| Allotex Inverso LP | | 2012 |
| Alloway Associates Ltd | Professional & scientific | 2026 |
| Allrig Holdco Limited | Other services | 2021 |
| Allrig Limited | Other services | 2013 |
| Allvirtumart Limited | Wholesale & retail | 2024 |
| ALM Safety Ltd | Administrative & support | 2011 |
| Alma Property Limited | Real estate | 2017 |
| Alma Solutions Limited | Construction | 2020 |
| Almec Holdings Ltd | Financial services | 2023 |
| Almondine Ltd | Hospitality | 2021 |
| Almost Original Ltd | Other services | 2026 |
| Alno Property Ltd | Real estate | 2024 |
| Alobp Investments Ltd | Financial services | 2020 |