| A H Motorsports Limited | Wholesale & retail | 2014 |
| A Haul Limited | Transport & logistics | 2018 |
| A T Cladding Consultants Ltd | Professional & scientific | 2013 |
| A&T Hospitality Ltd | Hospitality | 2019 |
| A.W. KAY Farming Limited | Agriculture & fishing | 2018 |
| AA Optical Solutions Ltd | Wholesale & retail | 2012 |
| AA Shot Blasting Limited | Construction | 2019 |
| Abbco Services Limited | Professional & scientific | 2007 |
| Abbott Projects Ltd | Real estate | 2009 |
| Abramova & Ryan Limited | Information & communication | 2019 |
| Acad Property Limited | Construction | 2022 |
| Acorn Planning Limited | Professional & scientific | 2009 |
| AD Astra Tutoring Ltd | Education | 2026 |
| AD Parts Supplies Ltd | Wholesale & retail | 2024 |
| Adam Green@Committedcoaches Ltd | Health & social care | 2025 |
| ADS Systems Limited | Manufacturing | 2014 |
| Advanced Brickwork & Masonry Ltd | Construction | 2016 |
| Advanced Computer Systems Property Holdings Limited | Information & communication | 2018 |
| Advocate Arms Hotel Ltd | Hospitality | 2012 |
| Advocate Arms Limited | Hospitality | 2017 |
| Advocate Homes Limited | Extraterritorial | 2006 |
| Advocate Properties Ltd | Administrative & support | 2018 |
| Aesthetics Beauty & Hair Ltd | Other services | 2024 |
| Aggrex Limited | Mining & quarrying | 2026 |
| Agnes Cora Homes Limited | Construction | 2022 |
| Agricultural Anhydrous Ammonia Limited | Manufacturing | 2019 |
| AI Accelerator Ltd | Professional & scientific | 2023 |
| Aknight Engineering Services Ltd | Professional & scientific | 2023 |
| Aleta's Hair Design Limited | Other services | 2002 |
| ALL Odds Ltd | Arts & recreation | 2021 |
| Allegro Consultancy Services Ltd | Information & communication | 2022 |
| Allerton Management Company Limited | Real estate | 2006 |
| Alloy Wizard Cosmetics Ltd | Wholesale & retail | 2023 |
| Alolo Creative Studio Ltd | Professional & scientific | 2025 |
| Alpine Cafe Scunthorpe Ltd | Hospitality | 2026 |
| Altek International Limited | Manufacturing | 2008 |
| AMC Controls & Instrumentation Limited | Professional & scientific | 2025 |
| Ancholme Agriculture Haulage Ltd | Transport & logistics | 2010 |
| Ancholme Trading Limited | Wholesale & retail | 2016 |
| Ancholme Valley Heritage Trust Ltd | Arts & recreation | 2013 |
| Andy Dalby Accounting Solutions Limited | Professional & scientific | 2007 |
| Andycarrington Ltd | Hospitality | 2023 |
| ANK & K Ltd | Energy | 2018 |
| ANN Tuplin Care Homes Ltd | Health & social care | 2015 |
| AP Training and Coaching Limited | Education | 2024 |
| AP2 Ltd | Other services | 2016 |
| Apb.Trafficservices Ltd | Public administration | 2019 |
| Apbees Ltd | Agriculture & fishing | 2026 |
| Apexuk-Precision Ltd | Wholesale & retail | 2019 |
| Applewood Business Consultancy Ltd | Real estate | 2014 |
| Aquatoria Limited | Professional & scientific | 2019 |
| Aqueel Zaman Engineering Ltd | Construction | 2009 |
| Arac Electrical Ltd | Manufacturing | 2026 |
| Archway Properties Doncaster Ltd | Real estate | 2021 |
| Arctic Swan Ltd | Real estate | 2023 |
| Arcturus (Kirton) Limited | Mining & quarrying | 2024 |
| Arlo's Party Hire Limited | Arts & recreation | 2019 |
| Arman Restaurant Limited | Hospitality | 2016 |
| Armstrong Saunders Limited | Professional & scientific | 2019 |
| Arnold Residential Ltd | Real estate | 2022 |
| Arras Brigg Limited | Wholesale & retail | 2024 |
| Art of Beauty Medical Aesthetics Ltd | Other services | 2024 |
| Artemis Private Investigations Limited | Administrative & support | 2022 |
| Arthur Dean Vehicle Sales Ltd | Wholesale & retail | 2002 |
| Arundel Kerr Produce Limited | Manufacturing | 1999 |
| Assured Roofing Contractors Limited | Construction | 2014 |
| Athwal Investments Ltd | Real estate | 2019 |
| Atrium Restaurant Brigg Ltd | Hospitality | 2025 |
| Autoshaw Limited | Wholesale & retail | 2000 |
| Avantaige Ltd | Professional & scientific | 2025 |
| Avantgarde Pro-Pave Ltd | Construction | 2019 |
| AW Confined Space and Renewables Limited | Construction | 2026 |
| B & J. Parker Property Limited | Administrative & support | 1996 |
| B and D Manpower Limited | Manufacturing | 2014 |
| Babylon Clee Ltd | Real estate | 2018 |
| Babylon Hull Ltd | Real estate | 2018 |
| Banging Burgers Street Food Ltd | Hospitality | 2018 |
| Barrick Close Management Company Limited | Real estate | 2021 |
| Bass Offshore Limited | Administrative & support | 2013 |
| BDC Group Limited | Financial services | 2019 |
| Bear & Biscuits Ltd | Professional & scientific | 2026 |
| Beauty by TIA Jadyn Ltd | Other services | 2026 |
| Becks Lane Equestrian Centre Limited | Other services | 2008 |
| BEE ZEN Community Interest Company | Wholesale & retail | 2025 |
| Bell Watson & Co Limited | Real estate | 2009 |
| BEN George Limited | Transport & logistics | 2009 |
| Bennett Potatoes Limited | Manufacturing | 2008 |
| Bernal Ltd | Professional & scientific | 2019 |
| Betula Close Ltd | Professional & scientific | 2020 |
| Beverley DO Ltd | Real estate | 2018 |
| BGC South Ltd | Wholesale & retail | 2019 |
| Big Bear Electrical Ltd | Construction | 2024 |
| Bills Chem-Mech Ltd | Professional & scientific | 2025 |
| Bioganix (Holdings) Ltd | Financial services | 2019 |
| Bioganix Generation Limited | Energy | 2016 |
| Bioganix Ltd | Water & waste | 2004 |
| Birch Image Interpretation Ltd | Education | 2016 |
| Bite Tackle Ltd | Wholesale & retail | 2025 |
| Black Moorhen Limited | Real estate | 2019 |
| Blackrock IT Solutions Limited | Information & communication | 2022 |