| 10ACITY Ltd | Administrative & support | 2013 |
| 121 PJH Travel Limited | Transport & logistics | 2021 |
| 278 Civil Engineering Limited | Construction | 2018 |
| 342 Services Ltd | Wholesale & retail | 2021 |
| 5 A.M. Contract Cleaners Limited | Administrative & support | 2010 |
| @Katie's Poulton Limited | Hospitality | 2018 |
| A & N Cain Property Renovations Ltd | Real estate | 2024 |
| A C Services (SW) Ltd | Administrative & support | 2012 |
| A Nigam Holdings Ltd | Financial services | 2021 |
| A R Rigging and Maintenance Ltd Ltd | Construction | 2024 |
| A R Rigging and Rope Access Ltd | Construction | 2018 |
| A Schofield Aero Consultancy Ltd | Professional & scientific | 2022 |
| A Welsh Seafoods Ltd | Wholesale & retail | 2011 |
| A.Lovell Civils Ltd | Construction | 2026 |
| A.S.L.Sugarrush Ltd | Hospitality | 2025 |
| Aans Building Supplies Ltd | Construction | 2025 |
| AC Specialist ENG Limited | Professional & scientific | 2024 |
| Activist Doctor Limited | Health & social care | 2026 |
| AD MAD Marketing Ltd | Information & communication | 2024 |
| Adam Walderman Art Ltd | Arts & recreation | 2024 |
| Adap Services Ltd | Administrative & support | 2025 |
| Addies Limited | Professional & scientific | 2013 |
| Addison Group ENT Ltd | Hospitality | 2025 |
| Adelaide House Hotel Ltd | Hospitality | 2018 |
| Admedia Solutions Limited | Professional & scientific | 2017 |
| Advanced Landscapes (North West) Ltd | Administrative & support | 2009 |
| Advanced Recycling Thornton Limited | Energy | 2024 |
| Aegis Close Protection Ltd | Administrative & support | 2026 |
| Aeww Ltd | Wholesale & retail | 2026 |
| AGI Bentley Rail Limited | Construction | 2017 |
| AI Home Services Limited | Financial services | 2018 |
| AJG Scaffolding Services Ltd | Construction | 2019 |
| AKH Inspection Services Limited | Mining & quarrying | 2017 |
| Akkaya Window Cleaning Ltd | Administrative & support | 2020 |
| Alexander Electrical Solutions Limited | Manufacturing | 2016 |
| ALF Seddon Limited | Hospitality | 2015 |
| ALL Pro Roofing Northwest Ltd | Construction | 2025 |
| Allcool (N.W.) Limited | Energy | 2010 |
| Alpha Monkeys Limited | Information & communication | 2026 |
| AM & SM Holdings Ltd | Financial services | 2018 |
| AM Packaging Corporation Limited | Manufacturing | 2009 |
| Ambition Solutions Limited | Professional & scientific | 2002 |
| AML Supplies Ltd | Wholesale & retail | 2020 |
| Ampc (2020) Ltd | Other services | 2019 |
| Amulet Healthcare Limited | Health & social care | 2025 |
| Anais Aesthetics Ltd. | Health & social care | 2015 |
| Anchor Collective CIC | Administrative & support | 2026 |
| Andrew Todd Ltd | Professional & scientific | 2012 |
| Andrews Bowen Equine Developments Limited | Construction | 2011 |
| Andrews Bowen Equine Engineering Limited | Construction | 2011 |
| Andrews Bowen Limited | Construction | 2005 |
| Anecox Ltd | Wholesale & retail | 2011 |
| Ankers Homes Limited | Real estate | 2025 |
| Apart Property Limited | Real estate | 2013 |
| Apartment Group Limited | Arts & recreation | 2025 |
| Approach Landscapes and Ground Work Ltd | Administrative & support | 2021 |
| Archway Haulage Limited | Transport & logistics | 2015 |
| Archway Properties (NW) Limited | Real estate | 2021 |
| Archway Travel Limited | Transport & logistics | 2012 |
| Armathwaite Management Company Limited | Professional & scientific | 2012 |
| Art Into Light Ltd | Information & communication | 2000 |
| AS Skin & Aesthetics Ltd | Other services | 2025 |
| Aspire Investing Ltd | Real estate | 2018 |
| Astin & Naismith Ltd | Construction | 2016 |
| At-I Installs Limited | Construction | 2008 |
| At-I Roofing & Maintenance Ltd | Construction | 2024 |
| At-I Security Limited | Construction | 2008 |
| AUK Properties Holdings Limited | Financial services | 2020 |
| AUK Properties Limited | Real estate | 2004 |
| Aureol Marine Ltd | Education | 2012 |
| Avalar Software Ltd | Information & communication | 2023 |
| Aveen Hairdressers Limited | Other services | 2021 |
| Aveen Salon Limited | Other services | 2026 |
| Avid Property Developments Ltd | Real estate | 2021 |
| Awake Property Holdings Ltd | Real estate | 2025 |
| Aziz BHA Limited | Wholesale & retail | 2025 |
| B & R Pharma Limited | Wholesale & retail | 2024 |
| B Johnstone Joinery Limited | Construction | 2015 |
| B W Property Division Ltd | Real estate | 2025 |
| B&M Properties (NW) Limited | Real estate | 2024 |
| B.Foster Plastering and Rendering Solutions Ltd | Construction | 2025 |
| B.S.S.M.C. Limited | Arts & recreation | 2003 |
| Backdrop Labs Ltd | Wholesale & retail | 2025 |
| Balolia Properties Ltd | Real estate | 2015 |
| Bamboo Education Services Ltd | Education | 2012 |
| Barra Projects Ltd | Construction | 2021 |
| Barrett Nelligan Solicitors Ltd | Professional & scientific | 2011 |
| Barzin Food Ltd | Hospitality | 2025 |
| Batesons Bespoke Bedrooms Limited | Construction | 2022 |
| Battle Station Mobile Gaming Ltd | Administrative & support | 2020 |
| Bay Property Solutions Ltd | Real estate | 2023 |
| BD Ramshaw Ltd | Transport & logistics | 2026 |
| Becklaw Windows Ltd | Manufacturing | 2025 |
| Beech Jackson Holdings Ltd | Financial services | 2024 |
| Beech Jackson Partnership Limited | Professional & scientific | 2007 |
| Behind Closed Doors Fleetwood CIC | Administrative & support | 2025 |
| Belgravia Media Group Global Ltd | Administrative & support | 2026 |
| Belsfield Care Limited | Professional & scientific | 2008 |
| Bennet & Boss Group UK Ltd | Professional & scientific | 2017 |
| Bennet & Boss UK Ltd | Professional & scientific | 2017 |