| 7 Hills Tours Limited | Administrative & support | 2018 |
| 9ROK Limited | Financial services | 2025 |
| A & D Watt Plumbing & Heating Limited | Construction | 2006 |
| A a C Renewables & Plumbing Limited | Construction | 2013 |
| A. Macgregor Joinery Contractor Limited | Construction | 2017 |
| Abacus Property Limited | Professional & scientific | 1990 |
| Abacus Services (Highlands) Limited | Professional & scientific | 2020 |
| Achabeag Community Company Limited | Professional & scientific | 2016 |
| Achnacarry Development Limited | Agriculture & fishing | 2014 |
| Achnacreebeag Energy Limited | Energy | 2010 |
| Achnaduin Limited | Administrative & support | 2016 |
| Acsf Limited | Hospitality | 2021 |
| ADA Studio Oban Ltd | Professional & scientific | 2021 |
| Adam Fire Engineers Limited | Manufacturing | 2016 |
| Adventure Oban Ltd | Arts & recreation | 2021 |
| Aeon MAC Ltd | Professional & scientific | 2018 |
| Aesthetic & Beauty Innovations Limited | Health & social care | 2026 |
| Agrimony Ltd | Professional & scientific | 2013 |
| AH Holding Group Limited | Financial services | 2026 |
| AH Trade Supplies Ltd | Wholesale & retail | 2026 |
| AHS Services (Mull) Ltd | Manufacturing | 2013 |
| Ailsa (Scotland) Limited | Hospitality | 2017 |
| Ainsley Smith & Co Limited | Professional & scientific | 2012 |
| AJB Investment Properties Limited | Real estate | 2025 |
| Alan Carmichael Joinery Limited | Construction | 2024 |
| Alcali Ltd | Professional & scientific | 2006 |
| Alchemy Plant & Contracting Ltd | Construction | 2011 |
| Aldred Clothing Limited | Wholesale & retail | 2022 |
| Algamy Limited | Professional & scientific | 2025 |
| ALI Clark Painter & Decorator Limited | Construction | 2007 |
| Alienergy Ltd | Professional & scientific | 2017 |
| ALL in Dunbeg Ltd | Professional & scientific | 2025 |
| Allwurx Contractors Limited | Construction | 2020 |
| Almand Property Limited | Real estate | 2024 |
| Altavona House Limited | Hospitality | 2025 |
| Amooze Booze Ltd | Hospitality | 2023 |
| Anchor and Steam Holdings Ltd | Hospitality | 2025 |
| Anderson Construction (Mull) Limited | Construction | 2024 |
| Anderson Lockhart Properties Ltd | Real estate | 2025 |
| Andrew Bauld Plumbing & Heating Ltd | Construction | 2026 |
| Andrew Lawson Limited | Wholesale & retail | 2024 |
| Andrew Mead & Co Ltd | Professional & scientific | 2018 |
| Andy Newiss & Co Ltd | Professional & scientific | 2020 |
| Anmar Maclennan Ltd | Hospitality | 2025 |
| Anwar Lifestyle Group Ltd | Other services | 2025 |
| APG Renewable Solutions Limited | Construction | 2024 |
| Appin Standard Investments Ltd | Real estate | 2023 |
| AQ Property Services Limited | Administrative & support | 2021 |
| Aquarius Energy Logistics Ltd | Professional & scientific | 2022 |
| Aquaweld Ltd | Manufacturing | 2019 |
| Arbo Properties Limited | Real estate | 2005 |
| Ardlussa Estate Limited | Professional & scientific | 2011 |
| Ardoran Marine Limited | Administrative & support | 2005 |
| Ardtornish Estate Company Limited | Agriculture & fishing | 1967 |
| ARG Enterprises Ltd. | Water & waste | 2005 |
| Argyll and Bute Care and Repair | Health & social care | 2001 |
| Argyll and Bute Cosmetic Dentures Limited | Manufacturing | 2015 |
| Argyll and the Isles Tourism Co-Operative Limited | Administrative & support | 2012 |
| Argyll Aquaculture Ltd | Extraterritorial | 2022 |
| Argyll Bathrooms Ltd | Construction | 2018 |
| Argyll Chefs Table With David Ltd | Hospitality | 2024 |
| Argyll Commercial Property Holdings Limited | Real estate | 2023 |
| Argyll Engineers Ltd | Manufacturing | 2018 |
| Argyll Fencer's Co-Operative Ltd | Construction | 2011 |
| Argyll Fencing and Timber Limited | Wholesale & retail | 2019 |
| Argyll Fencing Limited | Construction | 2015 |
| Argyll Haulage Limited | Transport & logistics | 2015 |
| Argyll Homes for ALL Limited | Construction | 2012 |
| Argyll Housing & Development Limited | Construction | 2006 |
| Argyll Lager Limited | Manufacturing | 2026 |
| Argyll Timber Framing Ltd | Construction | 2026 |
| Argyll Traders Ltd | Wholesale & retail | 2024 |
| Argyll Yacht Rigger Ltd | Other services | 2023 |
| Argyll, Lomond and the Islands Energy Agency | Professional & scientific | 2000 |
| Ariundle Centre Limited | Hospitality | 2018 |
| Armour Joinery Ltd | Financial services | 2020 |
| Arran Wildlife Cottages Limited | Hospitality | 2022 |
| Arranfern Limited | Wholesale & retail | 2012 |
| Asgog Ltd | Agriculture & fishing | 2021 |
| Asknish Consulting Ltd | Professional & scientific | 2010 |
| Aspect Home Improvements Scotland Limited | Construction | 2017 |
| Aspect Kitchens Limited | Hospitality | 2017 |
| Association of Scottish Shellfish Growers Limited | Professional & scientific | 1986 |
| Atlantic Marine Oban Ltd | Professional & scientific | 2018 |
| Aurora Rising Collective Ltd | Construction | 2026 |
| AYE Glas Community Interest Company | Information & communication | 2021 |
| B&M Parthnership T/A Coasters Bistro Limited | Hospitality | 2022 |
| Balvicar Bay Limited | Real estate | 2025 |
| Balvicar Convenience Stores Ltd | Wholesale & retail | 2012 |
| Balvicar Properties Ltd | Hospitality | 2019 |
| BAM Marine Limited | Agriculture & fishing | 2018 |
| Barcaldine Community Association | Other services | 2006 |
| Barranrioch Farm Pods Limited | Hospitality | 2025 |
| Barrblast Engineering Limited | Manufacturing | 2013 |
| Barrtrans Limited | Extraterritorial | 2022 |
| Bars Shore Ltd | Real estate | 1990 |
| Barton Property (Argyll) Limited | Real estate | 2011 |
| BAS Marine Limited | Agriculture & fishing | 2018 |
| Bbmc Developments Ltd | Hospitality | 2024 |
| BDF - Consulting Ltd | Wholesale & retail | 2019 |