| Aiglobal Limited | Wholesale & retail | 2019 |
| AIH Management Ltd | Real estate | 2026 |
| Aihcomms Ltd | Information & communication | 2022 |
| Aiir Networks Limited | Information & communication | 2021 |
| AIJ99 Limited | Real estate | 2019 |
| Aijia Ltd | Wholesale & retail | 2020 |
| AIK Optical Limited | Health & social care | 2019 |
| Aiken Bones Ltd. | Health & social care | 2006 |
| Aikendhead Grocery Limited | Wholesale & retail | 2023 |
| Aikg Holdings Ltd | Financial services | 2024 |
| Aikta Limited | Real estate | 2025 |
| Aila Holdings Ltd | Real estate | 2025 |
| Aileen Hughes Limited | Administrative & support | 2016 |
| Ailleachd Dhorcha Ltd | Households | 2025 |
| Ailsa 25 Limited | Financial services | 2023 |
| Ailsa Craig Investments Ltd | Arts & recreation | 2024 |
| Ailsa Craig Retreat Ltd | Hospitality | 2021 |
| Ailsa Crum Consulting Ltd | Education | 2024 |
| Ailsa Homes Ltd | Real estate | 2020 |
| Ailsa Properties Ltd | Real estate | 2023 |
| Ailsaview Cockapoo's Ltd | Agriculture & fishing | 2026 |
| Ailteir-Studio Ltd | Professional & scientific | 2022 |
| AIM Building and Maintenance Services Limited | Construction | 2020 |
| AIM Business Rescue Ltd | Administrative & support | 2022 |
| AIM Construction (Scot) Limited | Construction | 2022 |
| AIM Engineering & Fabrication Group Ltd | Manufacturing | 1984 |
| AIM Entertainment Group Ltd | Hospitality | 2018 |
| AIM Equestrian Limited | Arts & recreation | 2023 |
| AIM Group (Scot) Limited | Real estate | 2020 |
| AIM High Ventures LP | | 2016 |
| AIM Homes Limited | Construction | 2022 |
| AIM Overseas LP | | 2010 |
| AIM Professionals Ltd | Professional & scientific | 2021 |
| AIM Project Developments Limited | Construction | 2022 |
| AIM Properties & Investments Ltd | Real estate | 2025 |
| AIM Strategic Holdings Ltd | Financial services | 2025 |
| AIM Whitening Limited | Financial services | 2024 |
| Aiman Ltd | Administrative & support | 2023 |
| Aimc Global Ltd | Professional & scientific | 2026 |
| Aimdt Ltd | Health & social care | 2019 |
| Aimee Bridal Couture Limited | Wholesale & retail | 2016 |
| Aimee Martin Coaching Ltd | Health & social care | 2024 |
| Aimee Ryan Hair Limited | Real estate | 2019 |
| Aimee Ryan Limited | Other services | 2022 |
| Aimforbetter Ltd | Professional & scientific | 2026 |
| Aimhtrade Ltd | Wholesale & retail | 2024 |
| Aims Law Chambers Ltd | Administrative & support | 2024 |
| Aims Property Investments Limited | Real estate | 2023 |
| Aimvill Ltd | Real estate | 2021 |
| AIN110 Limited | Wholesale & retail | 2025 |
| Aina's Tech Ltd | Wholesale & retail | 2026 |
| Aincroft Group Holdings Ltd | Real estate | 2006 |
| Ainetheon Arts Ltd | Wholesale & retail | 2022 |
| Ainslie Brands Ltd | Professional & scientific | 2020 |
| Ainslie Currie Limited | Other services | 2011 |
| Aion Investments Limited | Real estate | 2024 |
| Aionios Ltd | Information & communication | 2025 |
| Aipos Ltd | Information & communication | 2016 |
| AIQ Property Management Limited | Real estate | 2025 |
| Air Charter Scotland Group Limited | Transport & logistics | 2020 |
| Air Charter Scotland Limited | Transport & logistics | 2006 |
| Air Developments Ltd | Construction | 2010 |
| Air Express L.P. | | 2016 |
| Air Fuaradh Limited | Professional & scientific | 2025 |
| Air Land & Subsea Inspection Technologies Ltd | Professional & scientific | 2014 |
| Air Performance Scotland Ltd | Construction | 2026 |
| Air SS Ltd | Administrative & support | 2019 |
| Air Travel Consultants Limited | Professional & scientific | 2022 |
| Air'N'Tyres Limited | Wholesale & retail | 2013 |
| Aira Pilates Ltd | Arts & recreation | 2025 |
| Airal Ltd | Manufacturing | 2007 |
| Airavata Solutions Ltd | Information & communication | 2024 |
| Airbles Building Contracts Limited | Construction | 1993 |
| Airbles Road Properties Limited | Construction | 2002 |
| Airbnb Habitat Cleaning Ltd | Administrative & support | 2025 |
| Airch Ltd | Professional & scientific | 2024 |
| Aircom Assets L.P. | | 2014 |
| Aircomm Solutions Ltd | Information & communication | 2020 |
| Aircommerce Ltd | Wholesale & retail | 2025 |
| Aircon MAN Limited | Construction | 2014 |
| Aircordon Ltd | Transport & logistics | 2022 |
| Aircraft Medical Ltd. | Manufacturing | 2001 |
| Aird Ventures Limited | Administrative & support | 2010 |
| Airdmd Ltd | Real estate | 2025 |
| Airdrie Car Wash Valeting Centre Ltd | Administrative & support | 2021 |
| Airdrie Kebab Limited | Hospitality | 2020 |
| Airdrie Legal Chambers Ltd | Professional & scientific | 2015 |
| Airdrie Tandoori Ltd | Hospitality | 2023 |
| Airdrie Youth Limited | Arts & recreation | 2025 |
| Aire-Sales Holdings Limited | Financial services | 2012 |
| Aire-Sales Scotland Limited | Construction | 1988 |
| Aireal Limited | Information & communication | 2025 |
| Airfinesse Solutions.Com Limited | Professional & scientific | 2025 |
| Airkick Innovations Ltd | Information & communication | 2024 |
| AIRLINER1 Europe Limited | Information & communication | 2013 |
| Airo Limited | Information & communication | 2008 |
| Airomair Limited | Water & waste | 2007 |
| Airport City Transfers (Scotland) Ltd | Transport & logistics | 2024 |
| Airport Deluxe Transfers Ltd | Administrative & support | 2022 |
| Airport Transfer Lanarkshire Ltd | Transport & logistics | 2018 |