| Alrahman Traders Limited | Real estate | 2025 |
| Already NOT YET Ltd | Information & communication | 2026 |
| Alrodwan CIC | Other services | 2025 |
| Alromex Ltd | Wholesale & retail | 2024 |
| Alrum Limited | Other services | 2020 |
| ALS Carry LP | | 2021 |
| ALS Couzens Artwork Ltd | Wholesale & retail | 2015 |
| ALS III Carry and Co-Invest GP LLP | | 2018 |
| ALS III Carry and Co-Invest LP | | 2018 |
| Alsgf Carry and Co-Invest GP LLP | | 2024 |
| Alsgf Carry and Co-Invest LP | | 2024 |
| Alsharikat Alealamiat Alawlaa Lilmueadaat Ltd | Wholesale & retail | 2024 |
| Alsheim Technical LP | | 2016 |
| Alstare Group | | 1994 |
| Alston Overseas LP | | 2014 |
| Alsun AI Ltd | Information & communication | 2024 |
| ALT Joinery and Building Ltd | Construction | 2024 |
| Alt-Fx LP | | 2024 |
| Alta Astra LP | | 2017 |
| Alta CPC Limited | Professional & scientific | 2014 |
| Alta IP Limited | Information & communication | 2022 |
| Altagliopizza Ltd | Hospitality | 2025 |
| Altaglobe Ltd | Construction | 2024 |
| Altair Medical Limited | Health & social care | 2021 |
| Altamira General Partnership | | 2023 |
| Altamira Investments LP | | 2017 |
| Altana Business LP | | 2015 |
| Altanastra Trading LP | | 2015 |
| Altar Capital Investments LP | | 2015 |
| Altavia Aggregator (Scotland) GP, LLP | | 2025 |
| Altavia Limited | Administrative & support | 2010 |
| Altazir OPS LP | | 2023 |
| Altbodyart Ltd | Other services | 2022 |
| Altcom Scotia Limited | Information & communication | 2022 |
| Altdorf Impex LP | | 2011 |
| Alteco LP | | 2014 |
| Altega Impex LP | | 2016 |
| Alter Dactive Worldwide LP | | 2012 |
| Alter Management LP | | 2011 |
| Alter Plano Limited | Financial services | 2014 |
| Altera Group LP | | 2016 |
| Altera Solutions LP | | 2012 |
| Altercom LP | | 2015 |
| Altercon LP | | 2016 |
| Alteria Management LP | | 2015 |
| Alternate Focus LP | | 2011 |
| Alternate Logistics LP | | 2011 |
| Alternative Media LP | | 2015 |
| Alternative Property Income Venture Scotland, L.P. | | 2007 |
| Alternative Scents Limited | Wholesale & retail | 2023 |
| Alternative Timber Limited | Wholesale & retail | 1999 |
| Alternative Training (Scotland) Ltd | Education | 2025 |
| Alternative X LP | | 2016 |
| Alternatives PE CV 2024 LP | | 2024 |
| Alternatyva Ltd | Construction | 2009 |
| Altero Business LP | | 2013 |
| Altero Solutions LP | | 2014 |
| Altessa Solutions LP | | 2017 |
| Altido Scotland Ltd | Hospitality | 2015 |
| Alting & Co. | | 2006 |
| Altior Capital Limited | Real estate | 2022 |
| Altior Solutions Limited | Professional & scientific | 2017 |
| Altiva Systems Ltd | Information & communication | 2026 |
| Altnabreac Wind Farm Limited | Energy | 2020 |
| Alto Business Power LP | | 2015 |
| Alto Capital LP | | 2012 |
| Alto Real Estate LP | | 2015 |
| Alto Sun Systems LP | | 2015 |
| Altomare Limited | Transport & logistics | 2017 |
| Alton Trade LP | | 2013 |
| Altonex Group LP | | 2016 |
| Altoros Trade LP | | 2016 |
| Altraco Chemicals LP | | 2016 |
| Altrade Group LP | | 2017 |
| Altranss LP | | 2015 |
| Altro Property Limited | Real estate | 2023 |
| Altura Access Ltd. | Mining & quarrying | 2013 |
| Altyon Real Estate Founder L.P. | | 2009 |
| Altyre II Windfarm Limited | Energy | 2018 |
| ALU GID Ltd | Manufacturing | 2020 |
| Aluci LP | | 2008 |
| Alumatic Ltd | Manufacturing | 2025 |
| Alun Williams Ltd | Health & social care | 2012 |
| Alung Services Ltd | Mining & quarrying | 2022 |
| Alura Imaging Ltd | Professional & scientific | 2025 |
| Alva Consulting Limited | Professional & scientific | 2009 |
| Alva Developments Edinburgh Limited | Hospitality | 2019 |
| Alva Solutions LP | | 2015 |
| Alva Street Holdings Limited | Financial services | 2016 |
| Alva Wealth Limited | Financial services | 2024 |
| Alvadu Ltd | Real estate | 2024 |
| Alvarasta Trade LP | | 2012 |
| Alvashore Limited | Professional & scientific | 2001 |
| Alvaston Development LP | | 2012 |
| Alvern Holdings LP | | 2016 |
| Alvesis LP | | 2016 |
| Alvisa Whisky (Scotland) LP | | 2018 |
| Alwalid Ltd | Extraterritorial | 2023 |
| Alwar Impex LP | | 2016 |
| Always BE Content Limited | Professional & scientific | 2017 |