| Adam Temple Limited | Real estate | 2017 |
| Adam Warrington Ltd | Information & communication | 2026 |
| Adams Digital Limited | Information & communication | 2019 |
| Adamson's Drinks Ltd. | Wholesale & retail | 2002 |
| Adaptiveml Limited | Information & communication | 2025 |
| Adas House Ltd | Administrative & support | 2025 |
| ADD a Splash Limited | Real estate | 2021 |
| Addconvert Ltd | Professional & scientific | 2026 |
| Addison Workplace Consulting Ltd | Professional & scientific | 2018 |
| Adergy Limited | Professional & scientific | 2013 |
| ADF Coating Inspections Ltd | Professional & scientific | 2026 |
| Adhartas HR Ltd | Professional & scientific | 2024 |
| ADI Enterprises Limited | Real estate | 2010 |
| Adluis Limited | Real estate | 2013 |
| ADM Fire & Security Ltd | Administrative & support | 2023 |
| Adrain Associates Limited | Real estate | 2016 |
| Adriamar Dining Ltd | Hospitality | 2025 |
| Adva Property Ltd | Real estate | 2018 |
| Advanced Roofline Installations Ltd | Administrative & support | 2017 |
| Advanced Vehicle Wraps Ltd | Professional & scientific | 2012 |
| Advanceforce Limited | Construction | 1988 |
| Advantage PR Limited | Professional & scientific | 2017 |
| Adventum Events Limited | Administrative & support | 2019 |
| Advise My Mortgage & Protection Ltd | Financial services | 2025 |
| Aequitas Commercial Ltd | Wholesale & retail | 2024 |
| Aerofurb Limited | Transport & logistics | 2018 |
| Aesthetics & Skin Ltd | Health & social care | 2026 |
| AET Venture Ltd | Real estate | 2024 |
| AF18 Consultancy Ltd | Information & communication | 2022 |
| Afelatay Ltd | Professional & scientific | 2023 |
| Affinity Business Centres Limited | Real estate | 2019 |
| Afforsk Property Limited | Real estate | 2022 |
| Afmb Holdings Limited | Professional & scientific | 2024 |
| AG Sobek Investments Limited | Real estate | 2020 |
| AG3 Consulting Limited | Professional & scientific | 2025 |
| Agape Christian School Ltd | Education | 2026 |
| AGB Online Solutions Limited | Information & communication | 2016 |
| AGC Holdings Ltd | Financial services | 2024 |
| Agile Test Works Limited | Information & communication | 2011 |
| AH Brilliant Ltd | Professional & scientific | 2003 |
| AH Fife Traders Ltd | Wholesale & retail | 2026 |
| Aheem Ltd | Professional & scientific | 2019 |
| AID for Business Development International Limited | Information & communication | 1995 |
| Aimee Mcfadden Design Ltd | Manufacturing | 2021 |
| Aioncrest Ltd | Information & communication | 2025 |
| Air Compressor Services (Scotland) Limited | Administrative & support | 2002 |
| Aiso Compliance & Training Limited | Education | 2019 |
| Aitken-Interactive Ltd | Information & communication | 2019 |
| AJ Black Trading Limited | Hospitality | 2019 |
| AJ Gibb Solutions Ltd | Professional & scientific | 2020 |
| Ajifola Global Services Ltd | Wholesale & retail | 2025 |
| AJR (Scotland) Limited | Construction | 2016 |
| AJR Financial Services Ltd | Financial services | 2012 |
| AJW Clothing Ltd | Wholesale & retail | 2024 |
| AK & Sons PVT Ltd | Wholesale & retail | 2025 |
| Akila Consulting Limited | Information & communication | 2011 |
| Akjak Offshore Ltd | Construction | 2022 |
| Akkounted Limited | Professional & scientific | 2019 |
| AKS Property Ltd | Real estate | 2022 |
| AL Fitness Ltd | Arts & recreation | 2018 |
| Al-Quran Islamic Education Centre Ltd | Wholesale & retail | 2022 |
| Alaina's Holiday Cottages Ltd | Hospitality | 2022 |
| Alammo Ltd | Real estate | 2021 |
| Alan Hynd Joiners & Building Contractors Limited | Construction | 2006 |
| Alan Johnstone Studios Ltd | Wholesale & retail | 2017 |
| Alan Reilly Transport Management Ltd | Transport & logistics | 2016 |
| ALB & ALB Ltd | Wholesale & retail | 2024 |
| Alba Safety Solutions Limited | Extraterritorial | 2020 |
| Alba Security Solutions Ltd | Administrative & support | 2020 |
| Alban Laser Systems Limited | Manufacturing | 2013 |
| Albany Brickwork Solutions Ltd | Construction | 2024 |
| Albert AI Ltd | Information & communication | 2019 |
| Alcatraz Engineering Ltd | Professional & scientific | 2020 |
| Alchemia Studio Limited | Manufacturing | 2006 |
| Alchemist Homes Ltd | Real estate | 2019 |
| Alderhall Properties Limited | Real estate | 2018 |
| Aldred Property Rental Ltd | Real estate | 2022 |
| ALE & Pate Limited | Hospitality | 2022 |
| Alessandro Milano & Co. Ltd | Hospitality | 2025 |
| Alev Engineering Services Limited | Administrative & support | 2018 |
| Alex & Co Property Limited | Real estate | 2026 |
| Alexander Thomson Plumbers Limited | Construction | 2024 |
| Alifin Investments Limited | Administrative & support | 2005 |
| Aljay Health Care Service Ltd | Health & social care | 2025 |
| ALL About Patisserie Ltd | Wholesale & retail | 2016 |
| ALL Star Housekeepers Ltd | Administrative & support | 2025 |
| Allan Corfield Architects Limited | Professional & scientific | 2010 |
| Allan Corfield Group Limited | Financial services | 2024 |
| Allan Corfield Structures Limited | Professional & scientific | 2020 |
| Allan Moffat Forestry Limited | Agriculture & fishing | 2011 |
| Allan Sinclair Limited | Professional & scientific | 2012 |
| Allan Wilson Buildings Ltd | Real estate | 2010 |
| Allcare Providers Scot Ltd | Health & social care | 2021 |
| Allergens Made Easy Ltd | Information & communication | 2026 |
| Almondvale Accountancy Ltd | Professional & scientific | 2008 |
| Almor Carpets Ltd | Wholesale & retail | 2017 |
| ALP Holdings Ltd | Financial services | 2016 |
| Alpha (Dunfermline) Ltd | Wholesale & retail | 2019 |
| Alpha Desserts Ltd | Hospitality | 2021 |
| Alpine Joinery & Building Services Ltd | Administrative & support | 2008 |