| Amtelle Development LP | | 2014 |
| Amulree Properties Limited | Real estate | 2021 |
| Amundsen Inter LP | | 2011 |
| Amundsen Matteo LP | | 2012 |
| AMY Hardie Productions Limited | Agriculture & fishing | 2001 |
| AMY Henley Limited | Wholesale & retail | 2016 |
| AMY Macdonald Ltd. | Arts & recreation | 2006 |
| AMY Macdonald Touring Ltd. | Arts & recreation | 2007 |
| Amygdala Productions Ltd | Information & communication | 2024 |
| Amynton LP | | 2017 |
| Amyra Property Management Limited | Construction | 2026 |
| Amytis Ltd | Manufacturing | 2021 |
| AMZ Dudes Ltd | Wholesale & retail | 2021 |
| Amzuri Consulting Ltd | Professional & scientific | 2008 |
| AN Airde Limited | Professional & scientific | 2016 |
| AN Development Service LP | | 2009 |
| AN Independent Zebra Ltd | Wholesale & retail | 2018 |
| AN Marintech LP | | 2018 |
| AN NHI Trading Limited | Wholesale & retail | 2025 |
| AN Ordinary Place Ltd | Professional & scientific | 2023 |
| AN Sgriobhadair Ltd | Professional & scientific | 2007 |
| AN YEN Ltd | Other services | 2025 |
| AN2GIO Limited | Real estate | 2024 |
| Anaf II Euro Feeder LP | | 2017 |
| Anaf II Euro Treasury LP | | 2017 |
| Anafer Corporation LP | | 2018 |
| Analog Robot Ltd | Professional & scientific | 2017 |
| Analory LP | | 2014 |
| Analysis Lost Productions Limited | Information & communication | 2003 |
| Analysis Risk Consulting Ltd | Information & communication | 2025 |
| Analytic Imaging Solutions Limited | Professional & scientific | 2009 |
| Anamur LP | | 2011 |
| Anance Intelligence Ltd | Information & communication | 2026 |
| Anand Logistics Ltd | Transport & logistics | 2026 |
| Anarco Structure LP | | 2015 |
| Anatom Group LP | | 2017 |
| Anaya Motors Ltd | Transport & logistics | 2025 |
| Anaya.B Ltd | Wholesale & retail | 2022 |
| ANB Investments | Other services | 2019 |
| Ancala Essential Growth Infrastructure FP GP LLP | | 2023 |
| Ancala Essential Growth Infrastructure FP LP | | 2023 |
| Ancaster Court Limited | Real estate | 1997 |
| Ancestral Scotland Limited | Administrative & support | 2003 |
| Anchor Property Solutions (EDB) Ltd | Real estate | 2025 |
| Anchor Stark LP | | 2022 |
| Anchorage Family Investments | Administrative & support | 2026 |
| Anchorfield Grocers Limited | Wholesale & retail | 2025 |
| Anchorline Properties Ltd | Households | 2020 |
| Anchorpoint Group Limited | Construction | 2015 |
| Anchorsol Ltd | Wholesale & retail | 2026 |
| Anchorwildstar Ltd | Transport & logistics | 2019 |
| Ancient Origins L.P. | | 2018 |
| Ancient Robot Workshop CIC | Professional & scientific | 2025 |
| Ancient-Holly LP | | 2000 |
| Ancom Alliance LP | | 2014 |
| Ancortics Distribution L.P. | | 2015 |
| Ancota Supreme LP | | 2019 |
| Ancrum Electronics Limited | Manufacturing | 2000 |
| AND Gallery Ltd | Wholesale & retail | 2016 |
| AND Your Dog Productions Limited | Extraterritorial | 2010 |
| Andadel Group LP | | 2017 |
| Andalay Global Limited Partnership | | 2001 |
| Andaman Customer Care LP | | 2023 |
| Andara Advertising LP | | 2017 |
| Andd Group LP | | 2022 |
| Andean Trails Ltd. | Administrative & support | 2004 |
| Anderson & Edwards Ltd | Professional & scientific | 2020 |
| Anderson Bayne Limited | Professional & scientific | 1982 |
| Anderson Brown Psychology Services Ltd | Professional & scientific | 2025 |
| Anderson Gillies Investments Ltd | Real estate | 2017 |
| Anderson Glass Consulting Limited | Professional & scientific | 2018 |
| Anderson Innovations Ltd | Professional & scientific | 2008 |
| Anderson Kilgour Ltd | Other services | 2019 |
| Anderson Nicholl Limited | Real estate | 2024 |
| Anderson Ross Watch Co Ltd | Manufacturing | 2026 |
| Anderson Solutions (Consulting) Ltd | Professional & scientific | 2008 |
| Anderson Strathern 2007 Limited | Professional & scientific | 1992 |
| Anderson Strathern Asset Management Limited | Professional & scientific | 2010 |
| Anderson Strathern LLP | | 2007 |
| Anderson Strathern Nominees Limited | Professional & scientific | 1992 |
| Anderson Strathern Trustee Company Limited | Professional & scientific | 1981 |
| Anderson Taxis Ltd. | Professional & scientific | 2002 |
| Anderson UK Installations Limited | Professional & scientific | 2013 |
| Anderson UXO Consultancy Limited | Other services | 2022 |
| Anderstrand Ltd | Professional & scientific | 2025 |
| Andertex LP | | 2011 |
| Anderton Technologies LP | | 2015 |
| Andes Solutions Ltd | Professional & scientific | 2024 |
| Andibat Ltd | Information & communication | 2024 |
| Andiego LP | | 2014 |
| Andimag Valets Limited | Other services | 2019 |
| Andinvest Limited | Real estate | 1965 |
| Andona LP | | 2011 |
| Andora Transit LP | | 2015 |
| Andouji Ltd | Real estate | 2023 |
| Andrasta Marine Ltd | Professional & scientific | 2026 |
| Andrea Corporation L.P. | | 2011 |
| Andrew Anthony Ltd | Wholesale & retail | 2022 |
| Andrew Archibald Consultants Limited | Professional & scientific | 2021 |
| Andrew Brookes Tailoring Ltd | Wholesale & retail | 2017 |