| 100 Pipers (Whisky) Limited | Wholesale & retail | 2001 |
| 110 (UK) Limited | Manufacturing | 1993 |
| 1ST Summerhouses Limited | Manufacturing | 2006 |
| 29 AK Limited | Hospitality | 2021 |
| 345 Property Management Limited | Real estate | 2024 |
| 3DEGREE Ltd | Wholesale & retail | 2023 |
| 5D-TEK Ltd | Professional & scientific | 2016 |
| A Plus Cleaner Ltd | Administrative & support | 2025 |
| A Rodger Construction Ltd | Construction | 2023 |
| A Whamond Construction Tech Limited | Construction | 2025 |
| A.I.R. (Air Conditioning and Refrigeration) Limited | | 1960 |
| A.R.L. Limited | Other services | 1994 |
| Aberlour Distillery Company Limited | Professional & scientific | 1950 |
| ABR Accounting Ltd | Administrative & support | 2016 |
| Abrupt Events Ltd | Arts & recreation | 2025 |
| Acaal Ltd | Construction | 2023 |
| Achievement Academy Limited | Education | 2024 |
| Adder Investment Holdings | Administrative & support | 2009 |
| Adhd Coaching With Rachel Ltd | Education | 2024 |
| AFA BBQ Ltd | Hospitality | 2020 |
| Aggreko UK Limited | Administrative & support | 1972 |
| AGR Dumbarton Ltd | Financial services | 2021 |
| AGR Truck & Trailer Ltd | Wholesale & retail | 2023 |
| Aitchison Contracts Ltd | Construction | 2014 |
| Aitkenshaw Estate Ltd | Real estate | 2024 |
| AJM Decor Ltd | Construction | 2025 |
| Al-Storage Ltd | Transport & logistics | 2025 |
| Al-Vehicles Limited | Transport & logistics | 2024 |
| Albion Gases Ltd | Wholesale & retail | 2022 |
| Alclutha Consulting Limited | Professional & scientific | 2022 |
| Algas Air Compressors & Maintenance Limited | Construction | 2022 |
| Algas Medical Installations Limited | Construction | 2005 |
| Algas Medical Installations Manufacturing Limited | Manufacturing | 2023 |
| Alger Assets Ltd | Other services | 2020 |
| Alger Electrics and Alarms Limited | Construction | 1992 |
| Alger Electrics Ltd | Construction | 2020 |
| ALI Balochi Limited | Hospitality | 2012 |
| Alice Nails & Spa Limited | Other services | 2022 |
| Allied Distillers Limited | Professional & scientific | 1948 |
| Allsorts Recycling Limited | Water & waste | 2013 |
| Allt a' Bhainne Distillery Limited | Wholesale & retail | 2001 |
| Ally MAC Mechanical Services Ltd | Manufacturing | 2014 |
| Alpha M Services Limited | Professional & scientific | 2023 |
| Alternatives West Dunbartonshire CDS | Health & social care | 2003 |
| Altra Systems Protection Limited | Administrative & support | 1999 |
| Always Looking Good Limited | Wholesale & retail | 2020 |
| Amars Dunti Ltd | Hospitality | 2025 |
| Amcg Management Ltd | Construction | 2021 |
| AMG Energy Ltd | Professional & scientific | 2016 |
| AMG Safety Associates Limited | Public administration | 2021 |
| Amphos ICP Limited | Construction | 2019 |
| AMW Building Services Ltd | Construction | 2018 |
| Andrews Garage Recovery Limited | Other services | 2014 |
| AOA Transport Ltd | Transport & logistics | 2016 |
| AP Capital Inc Ltd | Professional & scientific | 2026 |
| Apogee Running Ltd | Other services | 2019 |
| Aquinox Ltd | Information & communication | 2024 |
| Ardardan Estate Ltd. | Agriculture & fishing | 2006 |
| Argyll Flowers Limited | Wholesale & retail | 2023 |
| Argyll IT Limited | Information & communication | 2012 |
| Atge Plus Ltd | Information & communication | 2015 |
| Athion Labs Ltd | Manufacturing | 2022 |
| Atlantic Ecological Consulting Limited | Professional & scientific | 2017 |
| ATS GAS & Heating Ltd | Energy | 2025 |
| Aventis Consultancy Ltd | Other services | 2025 |
| Azolae Ltd | Construction | 2019 |
| Bakker Performance Ltd | Wholesale & retail | 2026 |
| Bandvandal Studios Ltd | Information & communication | 2019 |
| Bangin' Events Ltd | Hospitality | 2023 |
| Bangin' Pizza Ltd | Hospitality | 2020 |
| BAR41 Limited | Hospitality | 2019 |
| Batey Subsea Services Limited | Professional & scientific | 2014 |
| Batibut Software Ltd | Information & communication | 2024 |
| Bazaarpoint Ltd | Wholesale & retail | 2025 |
| Be-Outdoors Ltd | Administrative & support | 2018 |
| Beancounter Enterprises Ltd | Professional & scientific | 2023 |
| Beancounter Online Ltd | Professional & scientific | 2019 |
| BEN View Resource Centre | Other services | 2004 |
| Bespoke Joinery Construction Ltd | Construction | 2025 |
| Bespoke to Hair Ltd | Other services | 2019 |
| Best Tyre Place Ltd | Wholesale & retail | 2025 |
| Beyond Elegance Boutique Ltd | Wholesale & retail | 2025 |
| BID2ME Limited | Arts & recreation | 2025 |
| Bidscaping Ltd | Professional & scientific | 2023 |
| Big Shoe Media Ltd | Information & communication | 2025 |
| Birnie Holdings Ltd | Financial services | 2026 |
| Bisley Catering Limited | Hospitality | 2013 |
| Black Island Engineering Limited | Professional & scientific | 2016 |
| Blade N Fade Turkish Barber Ltd | Other services | 2020 |
| BLL Bars Ltd | Hospitality | 2012 |
| Blue Lantern Glasgow Limited | Hospitality | 2016 |
| Boydslaw 102 Limited | Real estate | 2006 |
| Bozwell Limited | Information & communication | 2014 |
| Braeval Distillery Limited | Professional & scientific | 2002 |
| Breslin Electrical Contracting Solutions Limited | Construction | 2019 |
| Brikken+Co Ltd | Information & communication | 2025 |
| Brophy Property Ltd | Real estate | 2024 |
| Brushed at Romis Hair Studio Ltd | Other services | 2025 |
| BUG Away Pest Control Ltd. | Administrative & support | 2024 |
| Bulletbelle Ltd | Wholesale & retail | 2025 |