| Adkin Construction Ltd | Construction | 2019 |
| Adkutz Ltd | Other services | 2024 |
| Adkv Consulting Ltd | Professional & scientific | 2025 |
| Adlantic Ltd. | Information & communication | 2016 |
| Adlin Property Ltd | Real estate | 2020 |
| ADM 2010 Ltd | Construction | 2010 |
| ADM Consultancy Ltd | Professional & scientific | 2020 |
| ADM Productions Limited | Information & communication | 2024 |
| ADM Property (Glasgow) Ltd | Real estate | 2023 |
| ADM Property (Scotland) Ltd | Real estate | 2026 |
| ADM Roofing Limited | Construction | 2017 |
| ADM Trading Ltd | Other services | 2025 |
| Admart Ltd Ltd | Wholesale & retail | 2026 |
| Admc Consultants Limited | Mining & quarrying | 2015 |
| Admedinvest LP | | 2015 |
| Admeta Limited | Professional & scientific | 2022 |
| Admf Limited | Real estate | 2026 |
| Admingeekz Limited | Information & communication | 2021 |
| Administration Plus Limited | Administrative & support | 2013 |
| Admira LP | | 2013 |
| Admiral Blinds Limited | Manufacturing | 2017 |
| Admiral Contracting Group Ltd | Construction | 2024 |
| Admit IT Ltd | Information & communication | 2023 |
| Admo Properties Ltd | Real estate | 2024 |
| Admpsgroup Ltd | Real estate | 2025 |
| ADN Equity Holdings Limited | Households | 2025 |
| ADN Properties Ltd | Real estate | 2014 |
| Adnan & Sons Ltd | Education | 2020 |
| Adnan G & Sons Ltd | Real estate | 2023 |
| Adnan Raza Photography Ltd | Information & communication | 2026 |
| Adnet Marketing Limited | Professional & scientific | 2018 |
| Adonai Global Services Limited | Education | 2025 |
| Adopt an AED Ltd | Wholesale & retail | 2019 |
| Adora Products Ltd | Wholesale & retail | 2019 |
| Adore Smile Ltd | Manufacturing | 2022 |
| Adore Weddings Photography & Videography Ltd | Professional & scientific | 2023 |
| Adoreblitz Limited | Wholesale & retail | 2017 |
| Adorian Group Ltd | Construction | 2026 |
| Adormidera Ltd | Hospitality | 2023 |
| Adorn Supplies Ltd | Wholesale & retail | 2016 |
| ADP (Scotland) Limited | Wholesale & retail | 2018 |
| ADP Building Limited | Construction | 2011 |
| ADP Practitioners Limited | Other services | 1992 |
| ADR Electrical Contracting Ltd | Construction | 2025 |
| ADR Fencing Scotland Ltd | Construction | 2024 |
| ADR Investment Property Ltd | Real estate | 2025 |
| ADR Investments Limited | Real estate | 2017 |
| Adrar Alba Ltd | Real estate | 2020 |
| Adrem Consulting Limited | Professional & scientific | 1998 |
| Adrenaline Costumes Limited | Professional & scientific | 2019 |
| Adria Terrace Limited | Hospitality | 2024 |
| Adrian B Mcmurchie Limited | Arts & recreation | 2015 |
| Adrianna Therapy Ltd | Other services | 2025 |
| Adriennes Aesthetics Ltd | Health & social care | 2023 |
| Adriven Ltd | Education | 2023 |
| Adriyatik Tasimacilik DIS TIC Ltd STI L.P. | | 2016 |
| Adrok Limited | Professional & scientific | 1997 |
| Adrqs Ltd | Professional & scientific | 2018 |
| ADS Events Limited | Other services | 2018 |
| ADS Globex LP | | 2016 |
| ADS LAB Limited | Information & communication | 2019 |
| ADS Place Media LLP | | 2013 |
| ADS Project Controls Ltd | Professional & scientific | 2013 |
| Adsena Stars Properties Ltd | Real estate | 2021 |
| Adspark Solutions Limited | Professional & scientific | 2021 |
| ADT Enterprises Limited | Wholesale & retail | 2013 |
| Adtherapies UK CIC | Health & social care | 2019 |
| Adufra Limited | Transport & logistics | 2019 |
| Aduwa and More Enterprise Ltd | Wholesale & retail | 2025 |
| ADV Dance Academy Limited | Arts & recreation | 2025 |
| Advance Access Ltd | Construction | 2021 |
| Advance Bookkeepers Ltd | Professional & scientific | 2023 |
| Advance Building Services Limited | Construction | 2007 |
| Advance Cleaning Solutions Limited | Administrative & support | 2016 |
| Advance Kitchens Ltd | Construction | 2023 |
| Advance Seller Ltd | Wholesale & retail | 2025 |
| Advanced Alba Assessing Limited | Professional & scientific | 2017 |
| Advanced ALL Trades Ltd | Construction | 2025 |
| Advanced Asset Consultants Limited | Professional & scientific | 2009 |
| Advanced Asset Holdings Ltd | Real estate | 2019 |
| Advanced Asset Management Ltd | Financial services | 2017 |
| Advanced Building Contractors Holdings Ltd | Construction | 2016 |
| Advanced Building Contractors Ltd. | Construction | 1999 |
| Advanced Case Management Solutions Limited | Information & communication | 2011 |
| Advanced Cladding Technology Ltd | Construction | 2023 |
| Advanced Craft Contracts Ltd | Construction | 2023 |
| Advanced Dentistry & Clinical Skills Centre Limited | Health & social care | 2022 |
| Advanced Domestic Appliances Limited | Manufacturing | 2000 |
| Advanced Driving Academy Limited | Education | 2025 |
| Advanced Engineering Design Ltd | Professional & scientific | 2017 |
| Advanced Fertility Care Limited | Health & social care | 2017 |
| Advanced Fire & Security Systems Ltd | Administrative & support | 2018 |
| Advanced Golf Techniques Ltd. | Arts & recreation | 2012 |
| Advanced Group (Scotland) Holdings Ltd | Professional & scientific | 2015 |
| Advanced Group (Scotland) Limited | Manufacturing | 2003 |
| Advanced Group TH Ltd | Information & communication | 2026 |
| Advanced Healthcare Solutions Ltd | Health & social care | 2020 |
| Advanced Images (Scotland) Limited | Manufacturing | 2010 |
| Advanced Innovation Solutions Ltd | Information & communication | 2021 |
| Advanced Marketing Chapter & Verse Ltd. | Information & communication | 2004 |