| 1 West Shaw Street Limited | Hospitality | 2019 |
| 134 Steakhouse Ltd | Hospitality | 2016 |
| 1677 Developments Ltd | Real estate | 2024 |
| 2DYNAMIC Limited | Information & communication | 2004 |
| 30 Bucks Ltd | Manufacturing | 2021 |
| 3D Exhibitions Limited | Administrative & support | 2010 |
| A & H Interiors (Scotland) Limited | Construction | 2016 |
| A & I Geotechnical Ltd | Construction | 2016 |
| A B Developments (Scotland) Limited | Construction | 2014 |
| A D Store Ltd | Wholesale & retail | 2026 |
| A Ramsay Holdings Limited | Professional & scientific | 2024 |
| A Shore Stay Limited | Hospitality | 2026 |
| A&A Software Solutions Limited | Information & communication | 2024 |
| A&S Miller Inspection Services Limited | Construction | 2023 |
| A.C. Still Limited | Wholesale & retail | 1989 |
| A.R.B. Gillespie Ltd | Real estate | 2019 |
| A1WESTEND Ltd | Real estate | 2009 |
| AAS Wash Ltd | Other services | 2019 |
| AB Spice Root Limited | Hospitality | 2025 |
| Abercorn Generation Limited | Energy | 2018 |
| ABH Contracts Scotland Ltd | Construction | 2020 |
| ABU Abdullah Ltd | Wholesale & retail | 2024 |
| AC Drainjet Limited | Other services | 2022 |
| Accident Repair Centre (Scotland) Limited | Professional & scientific | 2009 |
| ACK Commercial Ltd | Real estate | 2025 |
| ACT Data Centre Fit OUT ( UK ) Limited | Construction | 2019 |
| ADA Jess Properties Limited | Real estate | 2024 |
| Adman INT Ltd | Construction | 2019 |
| Adman International Ltd. | Financial services | 2009 |
| Adman Tech Ltd | Information & communication | 2020 |
| Advanced Plastering Services (Greenock) Limited | Construction | 2012 |
| AF Eats Ltd | Hospitality | 2025 |
| Affinity Befriending Company Ltd | Extraterritorial | 2025 |
| Afital Trading Ltd | Wholesale & retail | 2023 |
| African Strategic-Ventures (ASV) Ltd | Professional & scientific | 2019 |
| Afrifoods African Taste Limited | Wholesale & retail | 2025 |
| Afro-European Business Services Ltd | Education | 2022 |
| AG Properties (Scotland) Ltd | Real estate | 2025 |
| Agaz Sparkles Ltd | Administrative & support | 2026 |
| AGM Building Services Limited | Energy | 2016 |
| AGM Capital Ltd | Financial services | 2011 |
| AGM Group Limited | Financial services | 2006 |
| AGM Homes Limited | Extraterritorial | 2016 |
| AGM Projects Limited | Extraterritorial | 2016 |
| AGM Property Limited | Extraterritorial | 2016 |
| AHF News Ltd | Wholesale & retail | 2021 |
| Aiver Sport Limited | Wholesale & retail | 2013 |
| AJO Services Ltd | Health & social care | 2025 |
| Alan Bateman Properties Limited | Real estate | 2019 |
| Alan Nails & Spa Limited | Other services | 2025 |
| Alfie Decorators Ltd | Construction | 2019 |
| ALL Digital Group Limited | Professional & scientific | 2015 |
| ALL Pro Steel Limited | Construction | 2020 |
| ALL YOU Knead Therapies Ltd | Wholesale & retail | 2021 |
| Allan Plumbing & Heating Ltd | Construction | 2020 |
| Alldaysales Ltd | Wholesale & retail | 2025 |
| Alliance Group Management (Holdings) Limited | Financial services | 2022 |
| Alliance Management Properties Limited | Construction | 2022 |
| Alliance of Technology Transfer Professionals | Other services | 2010 |
| Allmar Marine Services Ltd. | Transport & logistics | 2018 |
| Allure Beauty & Nails Ltd. | Other services | 2006 |
| Alma (2025) Limited | Real estate | 2025 |
| Alma (Craobh) LLP | | 2005 |
| Alma Holt Ltd | Wholesale & retail | 2024 |
| Alma Leisure Limited | Real estate | 2003 |
| Alnoor Tandoori Limited | Hospitality | 2025 |
| ALP Access Ltd | Construction | 2025 |
| Alt-Na-Craig Limited | Health & social care | 2009 |
| Altec Motors Limited | Wholesale & retail | 2015 |
| Alteration by Linda Ltd | Information & communication | 2026 |
| Alternative Assets Ltd | Financial services | 2026 |
| Altitude Innovations Ltd | Information & communication | 2025 |
| Alzonex Limited | Wholesale & retail | 2020 |
| Alzonex Metals Ltd | Wholesale & retail | 2022 |
| Amal Greenock Limited | Hospitality | 2026 |
| Amberrose Fishing Limited | Agriculture & fishing | 2020 |
| American Nails & Spa 6868 Ltd | Other services | 2025 |
| Amore Cruise Connection Ltd | Transport & logistics | 2023 |
| Amore Express (Renfrew) Limited | Wholesale & retail | 2021 |
| AMY Kelly Hair Ltd | Other services | 2025 |
| Ana-Inga Ltd | Other services | 2026 |
| Angel Care Services (Scotland) Limited | Health & social care | 2012 |
| Antalya Turkish Barbers Limited | Other services | 2013 |
| Antons Fabrications Limited | Manufacturing | 2015 |
| Apathy Ltd | Information & communication | 2022 |
| Apex Mortgage Solutions Ltd | Financial services | 2023 |
| Apex Prime Limited | Wholesale & retail | 2021 |
| Apex Rope Access & Rigging Ltd | Construction | 2025 |
| App @ EAT Limited | Real estate | 2015 |
| Apple Arts Ltd | Professional & scientific | 2025 |
| Applied AI Services Ltd | Professional & scientific | 2023 |
| Aquathin (Scotland) Limited | Construction | 2006 |
| ARB Growth Ltd | Professional & scientific | 2019 |
| ARC Planning Services Ltd | Administrative & support | 2026 |
| ARC Way Homes Ltd | Real estate | 2025 |
| Ardgowan Developments Limited | Extraterritorial | 2005 |
| Ardgowan Software Solutions Ltd | Information & communication | 2023 |
| Argyle Street HB Ltd | Other services | 2022 |
| Argyll PUB Management Limited | Hospitality | 2019 |
| Aria Electrical Limited | Construction | 2009 |