| AA Removals (Yorkshire) Ltd | Transport & logistics | 2014 |
| Aa&Na Ltd | Real estate | 2023 |
| Abbey Electrical (Scarborough) Limited | Construction | 2015 |
| Abbey JET Ltd | Manufacturing | 2016 |
| Abbey LEN Catering Ltd | Hospitality | 2019 |
| Abbott Training & Support Services Limited | Administrative & support | 1999 |
| Abeo Limited | Professional & scientific | 2006 |
| Abraham Pizza Ltd | Hospitality | 2025 |
| Abrahams Quay (Whitby) Limited | Households | 1998 |
| Abul and Alkas Ltd | Real estate | 2025 |
| Aceb (Academic,Commercial,Electrical & Building) Services Ltd. | Administrative & support | 1986 |
| Aced Portfolio Ltd | Real estate | 2017 |
| Acis Distribution Services Ltd | Wholesale & retail | 2008 |
| Acis Limited | Professional & scientific | 1999 |
| Ackroyd Interpreting Limited | Professional & scientific | 2025 |
| Acorn Tank Services Ltd | Manufacturing | 2012 |
| Action Property Personnel Limited | Real estate | 2009 |
| Active Events Solutions Ltd | Administrative & support | 2023 |
| Active Orbit Limited | Information & communication | 2020 |
| Active Property Developments Limited | Real estate | 2017 |
| Active Security Solutions North Yorkshire Ltd | Administrative & support | 2015 |
| Activity Parks Limited | Arts & recreation | 2012 |
| AD ENG. Solutions Ltd | Professional & scientific | 2025 |
| ADA Invest Ltd | Real estate | 2025 |
| Adam Bennett Ltd | Real estate | 2016 |
| Addcore Limited | Wholesale & retail | 2012 |
| Addisons Holdings Limited | Professional & scientific | 2026 |
| ADF Property Rentals Limited | Real estate | 2019 |
| ADL Electrical (Yorkshire) Ltd | Construction | 2015 |
| Admirals View RTM Company Limited | Households | 2025 |
| Adram Solutions Ltd | Wholesale & retail | 2026 |
| Aduparayil Ltd | Health & social care | 2023 |
| Advance Digital (Yorkshire) Ltd | Information & communication | 2009 |
| Advanced Automotive Group Limited | Wholesale & retail | 2017 |
| Advisoryxpress Ltd | Professional & scientific | 2025 |
| Aeacus Ltd | Wholesale & retail | 2022 |
| AEL (Scarborough) Ltd | Professional & scientific | 2007 |
| Aelc Ltd | Construction | 2025 |
| Aesthetics by Bree Ltd | Other services | 2017 |
| Aesus Limited | Real estate | 2024 |
| AGE UK North Yorkshire Coast & Moors | Health & social care | 2011 |
| Agnes Grey House Limited | Households | 2004 |
| Agriago Ltd | Agriculture & fishing | 2013 |
| Agricultural Systems Analysis Limited | Professional & scientific | 1997 |
| Agriserve Management Limited | Professional & scientific | 2015 |
| AI DFY Ltd | Information & communication | 2025 |
| AI Governance Advisory Ltd | Professional & scientific | 2026 |
| AIM High Online Ltd | Information & communication | 2016 |
| Air Assist Drone Surveys Limited | Construction | 2025 |
| Airmedic International Limited | Health & social care | 2023 |
| Aitchandbee 1 Limited | Real estate | 2025 |
| AJ Shalom Ltd | Wholesale & retail | 2010 |
| AJ Shalom Properties Ltd | Real estate | 2020 |
| AJB Automotive Services Ltd | Wholesale & retail | 2014 |
| Ajmair Traders Ltd | Wholesale & retail | 2025 |
| AJP Civils Limited | Construction | 2011 |
| AKO Kebab 2017 Ltd | Hospitality | 2017 |
| AL Farno Limited | Hospitality | 2026 |
| AL Madina Fresh Ltd | Wholesale & retail | 2026 |
| AL Timepieces Limited | Wholesale & retail | 2022 |
| Alan Franks (Scarborough) Limited | Wholesale & retail | 1980 |
| Albemarlehotelscarborough Ltd | Hospitality | 2026 |
| Albion Road Residents Association Limited | Households | 2003 |
| Alex MAY Accounting Services Limited | Professional & scientific | 2024 |
| Alex MAY Group Limited | Financial services | 2025 |
| Alexander Court Flats Management Co Limited | Households | 1992 |
| Alexandra Centre Ltd | Real estate | 2018 |
| Alexandra Community Sports and Leisure Centre Ltd | Arts & recreation | 2003 |
| Alfer Global Limited | Manufacturing | 2020 |
| Alkim Project Management & SAP Consultants Ltd | Information & communication | 2024 |
| ALL Ball Ltd | Arts & recreation | 2024 |
| ALL Financial Advice Ltd | Financial services | 2012 |
| ALL Game and Eggs Ltd | Hospitality | 2018 |
| ALL Points Electrical Services Ltd | Construction | 2010 |
| ALL the Rage (Scarborough) Limited | Arts & recreation | 2025 |
| Allen Group Hotels Limited | Financial services | 2023 |
| Allen Hotels Limited | Hospitality | 2005 |
| Allfield Management (Scarborough) Limited | Real estate | 2003 |
| Allied Limited | Administrative & support | 1995 |
| Alloyplant Limited | Extraterritorial | 1994 |
| Allpine (UK) Limited | Wholesale & retail | 2001 |
| Allstar Picture Library Limited | Manufacturing | 2000 |
| Allstone Developments Limited | Construction | 2018 |
| Alma Inn Scarborough Ltd | Hospitality | 2025 |
| Alma Veterinary Surgery Ltd | Professional & scientific | 2020 |
| Almora Holdings Limited | Professional & scientific | 2011 |
| Almora Limited | Real estate | 2011 |
| Alpha Building and Renovations Ltd | Construction | 2023 |
| Alpine (Bay) Limited | Hospitality | 2016 |
| Alpine ALL Seasons Limited | Hospitality | 2018 |
| ALS (Northern) Ltd | Construction | 2013 |
| Alsaffar Medical Limited | Health & social care | 2023 |
| Alset Estates Limited | Agriculture & fishing | 2023 |
| Alset Estates SHF Ltd | Agriculture & fishing | 2018 |
| Alset Hire Limited | Administrative & support | 2018 |
| Alset Trading Limited | Wholesale & retail | 2016 |
| Alta Electrical Solutions Limited | Construction | 2026 |
| Altarseal Media Ltd | Information & communication | 2025 |
| Always There Providing Care Ltd | Public administration | 2025 |
| Alwoodley Property Services (North Yorkshire) Ltd | Construction | 2023 |