| AM93 Limited | Financial services | 2024 |
| Amad Barbers Ltd | Other services | 2022 |
| Amazing Owls Educational Play Ltd | Education | 2018 |
| Ambulance International Scarborough Ltd | Health & social care | 2018 |
| Amdine Ltd | Financial services | 2013 |
| AMG Sheet Metal Limited | Manufacturing | 2009 |
| Amgtraders Limited | Wholesale & retail | 2025 |
| Amplify Excellence Ltd | Professional & scientific | 2025 |
| Analog Visuals Limited | Information & communication | 2024 |
| Ancor Marine Ltd | Professional & scientific | 2024 |
| AND Vinyly Ltd. | Other services | 2020 |
| Andreea&Madalin Transport Ltd | Transport & logistics | 2025 |
| Andrew Brepi Stained Glass Ltd | Manufacturing | 2014 |
| Andrew Cowen Estate Agent Limited | Real estate | 1999 |
| Andrew Taylor Construction Management Limited | Construction | 2018 |
| Andrew Taylor Holdings Ltd | Financial services | 2022 |
| Andrew Taylor Property Management Ltd | Construction | 2020 |
| Andrew Taylor Quantity Surveying Ltd | Professional & scientific | 2014 |
| Andron Roofing Ltd | Construction | 2018 |
| Andy Hire Sales & Service Limited | Administrative & support | 1988 |
| Andys Window Cleaning Services Limited | Administrative & support | 2003 |
| Angel Bites Ltd | Hospitality | 2025 |
| ANGELSNO8 Limited | Administrative & support | 2019 |
| Animated Objects Community Arts Limited | Arts & recreation | 2013 |
| Animated Objects Ltd | Arts & recreation | 2013 |
| Annwyn Botanicals Ltd | Manufacturing | 2014 |
| Anteris Management Consultancy Ltd | Professional & scientific | 2022 |
| Anthony Goddard Training Limited | Education | 2024 |
| Anthony Luddon Healing Ltd | Health & social care | 2023 |
| Antons Cafe Bar Grill Limited | Hospitality | 2012 |
| AP Design and Management Ltd | Professional & scientific | 2024 |
| APC Crescent Properties Ltd | Households | 2024 |
| Apex Construction (Whitby) Limited | Construction | 2026 |
| Apex Joinery (Yorkshire) Ltd | Manufacturing | 2025 |
| Apollo Plastic Systems Limited | Manufacturing | 1994 |
| Appliance Development Services Limited | Manufacturing | 2014 |
| Apt-Itude Developments Ltd | Construction | 2025 |
| Aquamain Limited | Construction | 2002 |
| Arabia Marine Advisory Limited | Transport & logistics | 2023 |
| ARB Steel Construction Ltd | Extraterritorial | 2018 |
| ARB Trading Limited | Administrative & support | 2008 |
| Arbor Homes Limited | Construction | 1970 |
| ARC Building Contractors Limited | Construction | 2025 |
| ARC Hearing Holdings Ltd | Financial services | 2023 |
| Arcane Ecology Ltd. | Arts & recreation | 2020 |
| Arch Garage Ltd | Wholesale & retail | 2021 |
| Archer Properties (Scarborough) LLP | | 2020 |
| Ardfern Yacht Centre Limited | Manufacturing | 1987 |
| Argo (Scarborough) Limited | Real estate | 2025 |
| ARK House Rehab Ltd | Health & social care | 2011 |
| Arlington Apartments (Scarborough) Limited | Households | 2008 |
| ARM Handyman Limited | Construction | 2020 |
| Armani's Tailor Limited | Other services | 2020 |
| Arosa Caravan & Camping Park Limited | Hospitality | 2003 |
| Art Auctions Ltd | Wholesale & retail | 1997 |
| Artent Limited | Information & communication | 2012 |
| Arthur James Investments Ltd | Real estate | 2021 |
| Artic Circle Ltd | Transport & logistics | 2011 |
| Artisantraditions Ltd | Manufacturing | 2023 |
| Artsbeacon Ltd | Extraterritorial | 2014 |
| AS Architectural Services (SCA) Ltd | Professional & scientific | 2026 |
| AS Painting Contractors Limited | Construction | 2019 |
| Asclepius Medical Solutions Limited | Health & social care | 2017 |
| Ashbee and Stone Ltd | Wholesale & retail | 2015 |
| Ashby Berry Coulsons Limited | Professional & scientific | 2012 |
| Ashcroft Management (Scarborough) Limited | Real estate | 2004 |
| Ashley Cooke's Properties Limited | Real estate | 2024 |
| Ashworth Waste Services Ltd | Mining & quarrying | 2019 |
| Askew Brook Limited | Information & communication | 2013 |
| ASO Fresh Meat Limited | Wholesale & retail | 2024 |
| Aspire Control Solutions Ltd | Financial services | 2023 |
| Aspire Guardianship UK Limited | Education | 2017 |
| Aspire Homes (Yorkshire) Limited | Extraterritorial | 2013 |
| Asquith Accountants Ltd | Professional & scientific | 2006 |
| Asquith Hall Ltd | Hospitality | 2021 |
| Assured Pensions & Investments Ltd | Financial services | 2019 |
| Asters Specialist Care (Yorkshire) Ltd | Health & social care | 2024 |
| Astoria Court Limited | Households | 1973 |
| Astro Abley Ltd | Professional & scientific | 2025 |
| AT Five Plus SIX RTM Company Ltd | Households | 2021 |
| AT Four Plus Seven RTM Company Ltd | Households | 2021 |
| Atcom Property Services Limited | Construction | 2022 |
| Atcom Systems Limited | Mining & quarrying | 2010 |
| Athemio Ltd | Wholesale & retail | 2026 |
| Atkinson Plumbing & Heating (Yorkshire) Ltd | Construction | 2023 |
| Atkm Limited | Real estate | 2022 |
| Atlas Cafe (Scarborough) Limited | Hospitality | 2025 |
| ATR Global Ltd | Information & communication | 2024 |
| AUR Cymru Limited | Manufacturing | 2013 |
| Auretin Limited | Professional & scientific | 2025 |
| Auto Mobile Garage Services Limited | Wholesale & retail | 2002 |
| Autocool Radiators Limited | Wholesale & retail | 2002 |
| Autodiesel Limited | Wholesale & retail | 2006 |
| Autofix Motors Ltd | Wholesale & retail | 2018 |
| Autonomous Systems Limited | Information & communication | 2007 |
| AV Electrical Services Ltd | Construction | 2020 |
| Avenue Victoria Flats Management Company Limited | Households | 2003 |
| Avocet Scarborough Holdings Limited | Financial services | 2018 |
| AW Events Ltd | Wholesale & retail | 2024 |
| Axcell Ltd | Wholesale & retail | 2025 |