| A S L P 65 | | 2001 |
| A S L P 70 | | 2002 |
| A Sattar Enterprises Ltd | Real estate | 2025 |
| A Scott Electrical Limited | Administrative & support | 2016 |
| A Sehgal Coaching Ltd | Arts & recreation | 2025 |
| A Sehgal Properties Ltd | Real estate | 2022 |
| A Skin Hub Ltd | Wholesale & retail | 2025 |
| A Star Valet and Detailing Ltd | Administrative & support | 2023 |
| A Steel LP | | 2016 |
| A to Z Catering Consultancy Services Ltd | Hospitality | 2017 |
| A to Z Craft Ltd | Wholesale & retail | 2024 |
| A to Z Home Essentials Limited | Wholesale & retail | 2014 |
| A to Z Teknology Limited | Wholesale & retail | 2019 |
| A Touch of Home Ltd | Hospitality | 2019 |
| A V Fusion Limited | Hospitality | 2005 |
| A V Reseller Shop Limited | Wholesale & retail | 2025 |
| A WEE Pedal Ltd | Administrative & support | 2019 |
| A WEE Pedal Tours Ltd | Administrative & support | 2025 |
| A WEE Taste of Edinburgh Limited | Administrative & support | 2020 |
| A Williamson Haulage Holdings Limited | Financial services | 2018 |
| A Williamson Haulage Limited | Transport & logistics | 2006 |
| A&A Afrocarribean Grocery Limited | Wholesale & retail | 2023 |
| A&A Brothers Scot Limited | Wholesale & retail | 2024 |
| A&A BROTHERS246 Limited | Wholesale & retail | 2024 |
| A&A Edin Store Limited | Wholesale & retail | 2025 |
| A&A Electrical Solutions Ltd | Construction | 2008 |
| A&A Investment Management Ltd | Extraterritorial | 2011 |
| A&A Investments LP | | 2019 |
| A&A PVT Mart Ltd | Wholesale & retail | 2026 |
| A&B Brothers Edin Limited | Financial services | 2024 |
| A&B&C Ltd | Professional & scientific | 2015 |
| A&C Asset Management Ltd | Hospitality | 2025 |
| A&D Marketing L.P. | | 2011 |
| A&E Gütermann (UK) Limited | Manufacturing | 1931 |
| A&E Johnston Holdings Ltd | Financial services | 2020 |
| A&G Premier Property Management Ltd | Real estate | 2024 |
| A&H Property Venture Ltd | Construction | 2025 |
| A&J Building Projects Limited | Construction | 2016 |
| A&J Consulting International LP | | 2023 |
| A&J Techs Ltd | Wholesale & retail | 2025 |
| A&K Properties (EDI) Ltd | Real estate | 2023 |
| A&K Wilk Properties Ltd | Real estate | 2025 |
| A&M Exports Ltd | Wholesale & retail | 2025 |
| A&N International Ltd | Wholesale & retail | 2020 |
| A&P Edin Holdings Limited | Financial services | 2026 |
| A&P Hosting Ltd | Real estate | 2024 |
| A&R National Ltd | Administrative & support | 2022 |
| A&R Victory Ltd | Transport & logistics | 2018 |
| A&S Family Estate Ltd | Real estate | 2025 |
| A&S General LP | | 2011 |
| A&Txdream Ltd | Wholesale & retail | 2025 |
| A'Chill Trade Corp LP | | 2016 |
| A, I, & R Jack Lettings Limited | Real estate | 2022 |
| A-Deus Ltd | Manufacturing | 2020 |
| A-One Africa Ltd | Hospitality | 2020 |
| A-Team Tree Surgery & Garden Services Ltd | Administrative & support | 2024 |
| A-Tint Edinburgh Ltd | Administrative & support | 2023 |
| A-Z Quest Ltd | Administrative & support | 2024 |
| A. & a. Surveying LLP | | 2003 |
| A. Fleming Carpets Limited | Wholesale & retail | 1995 |
| A. P. Sweeney Construction Ltd | Professional & scientific | 2014 |
| A. Performance Consultancy Ltd | Professional & scientific | 2020 |
| A. Sacranie & Associates Limited | Professional & scientific | 2024 |
| A. Sanderson Electrical Ltd. | Construction | 2007 |
| A.A. Young Ltd. | Construction | 1992 |
| A.B Chohan Ltd | Professional & scientific | 2026 |
| A.B.B. Builders Ltd. | Construction | 2019 |
| A.B.C. Productions Limited | Construction | 1978 |
| A.Barr T/A Alpha Business Machines Limited | Manufacturing | 2013 |
| A.C. Lessels Holdings Ltd. | Financial services | 2025 |
| A.D. Coates & Co Ltd | Professional & scientific | 2006 |
| A.D.I. Scotland Ltd | Health & social care | 2012 |
| A.F.T.I LP | | 2015 |
| A.H. Marks Pensions Scottish Limited Partnership | | 2014 |
| A.I.M. (North) Ltd. | Administrative & support | 2007 |
| A.Ideal Group Limited | Information & communication | 2025 |
| A.J. Bryce Joinery & Tiling Ltd. | Construction | 2012 |
| A.J.Bryce & SON Joinery Ltd | Construction | 2025 |
| A.K Store Ltd | Wholesale & retail | 2024 |
| A.K.D. Systems Limited | Administrative & support | 1988 |
| A.K.H Developments Ltd | Real estate | 2006 |
| A.L Ideal Solution UK Limited | Wholesale & retail | 2018 |
| A.M. Advert Media & Co. | | 2008 |
| A.Of.E Ltd | Manufacturing | 2013 |
| A.P. Newall & Company Limited | Administrative & support | 1917 |
| A.R Edinburgh Properties Ltd | Hospitality | 2025 |
| A.R Traxx Limited | Wholesale & retail | 2024 |
| A.S.Management Resources Ltd | Professional & scientific | 2026 |
| A.S.P.I.H. LP | | 2014 |
| A1 Barber ED Ltd | Other services | 2025 |
| A1 Financial Solutions Ltd | Financial services | 2004 |
| A1 Gates Ltd | Construction | 2022 |
| A1 Group Edinburgh Ltd | Construction | 2021 |
| A1 Premium Logistics Limited | Transport & logistics | 2025 |
| A1 Restaurant Ltd | Hospitality | 2022 |
| A1 TV Services Limited | Manufacturing | 2009 |
| A1LUX Ltd | Transport & logistics | 2024 |
| A1TEX Import L.P. | | 2010 |
| A2ACH Limited | Professional & scientific | 2026 |
| A2E Tech Limited | Administrative & support | 2022 |