| 9EONS Plus Limited | Information & communication | 2008 |
| 9I Labs Limited | Information & communication | 2022 |
| 9ICE Care Services Limited | Health & social care | 2023 |
| 9OCLOCK Ltd | Hospitality | 2024 |
| 9PROTOCOL Ltd | Information & communication | 2019 |
| 9STAR Innovations Ltd | Wholesale & retail | 2018 |
| 9TH Bedroom Ltd | Information & communication | 2025 |
| @Lantic Data Systems Limited | Real estate | 2000 |
| A & a Healthcare Services Limited | Health & social care | 2015 |
| A & C Rapido Launderette Ltd | Other services | 2019 |
| A & C Tadman Limited | Other services | 2011 |
| A & D Kennedy Properties Limited | Real estate | 2018 |
| A & H Accountants Ltd | Professional & scientific | 2022 |
| A & K Shah Property Limited | Real estate | 2024 |
| A & M Creative Concept Ltd | Professional & scientific | 2023 |
| A & M Tool Hire Ltd | Administrative & support | 2024 |
| A & P Accountants Limited | Professional & scientific | 2018 |
| A & Q Enterprise Limited | Hospitality | 2019 |
| A & R Properties (Longham) Limited | Construction | 2014 |
| A & Z Dermatology Clinic Limited | Health & social care | 2007 |
| A 2 Plus Limited | Wholesale & retail | 2005 |
| A and M Carpentry and Construction Limited | Administrative & support | 2014 |
| A B Building and Groundworks Limited | Construction | 2023 |
| A B Grace LLP | | 2025 |
| A B Turnkey Solutions for Manufacturing Limited | Manufacturing | 2001 |
| A BIT Digital Limited | Information & communication | 2015 |
| A BUX Ltd | Professional & scientific | 2019 |
| A C S Care Services Ltd | Health & social care | 2003 |
| A C Swayne Consulting Ltd | Professional & scientific | 2024 |
| A Day's March Shirts & Staples Limited | Wholesale & retail | 2017 |
| A Dwyer Ltd | Health & social care | 2014 |
| A E Bray Limited | Administrative & support | 2015 |
| A G Drivers Limited | Transport & logistics | 2018 |
| A H Healthcare Limited | Health & social care | 2015 |
| A Hritcu Ltd | Transport & logistics | 2017 |
| A J Autos (MK) Limited | Wholesale & retail | 2009 |
| A J D Decorating Limited | Construction | 2017 |
| A J Executive Cars Ltd | Wholesale & retail | 2017 |
| A J Mobility Limited | Administrative & support | 1993 |
| A J Parkes Ltd | Information & communication | 2024 |
| A K and J D Riches Property Management Ltd | Real estate | 2024 |
| A K Kansagra Ltd | Real estate | 2015 |
| A Little Big KID Limited | Extraterritorial | 2022 |
| A M B I Investments Limited | Real estate | 2001 |
| A M Developments MK Ltd | Construction | 2017 |
| A M Restaurants MK Limited | Hospitality | 2025 |
| A M Roper Consulting Limited | Information & communication | 2019 |
| A Mark-Ed Improvement Limited | Financial services | 2021 |
| A Mentor's Mission CIC | Education | 2024 |
| A Milford Ltd | Professional & scientific | 2025 |
| A Mocktail Fusion Limited | Hospitality | 2025 |
| A Monier Ltd | Transport & logistics | 2025 |
| A N Fitness Limited | Arts & recreation | 2012 |
| A N K Private Surgery Limited | Health & social care | 2015 |
| A N Other PUB Company Ltd | Real estate | 2016 |
| A New Dawn Celebrations Limited | Wholesale & retail | 2026 |
| A P Griffiths & SON Limited | Wholesale & retail | 2018 |
| A P Whiteley Consultants Limited | Professional & scientific | 2002 |
| A Paradise Ltd | Wholesale & retail | 2020 |
| A Pierson Holdings Ltd | Real estate | 2019 |
| A Save & Prosper Company Limited | Information & communication | 2012 |
| A Saydi Consultancy Ltd | Professional & scientific | 2021 |
| A Shah Pharm Limited | Professional & scientific | 2024 |
| A Squad Kitchen Ltd | Hospitality | 2026 |
| A Step Properties Ltd | Construction | 2026 |
| A T B Tompson Limited | Financial services | 2014 |
| A T Software Limited | Administrative & support | 1997 |
| A Taste of Magic Ltd | Manufacturing | 2026 |
| A to B Couriers Limited | Transport & logistics | 2003 |
| A to B MEN Transport Ltd | Construction | 2016 |
| A to Z Business Coachulting Ltd | Information & communication | 2024 |
| A to Z Transport(Uk) Limited | Transport & logistics | 2022 |
| A Trade Group Ltd | Wholesale & retail | 2019 |
| A W Building Contractors Limited | Construction | 2021 |
| A W Construction Limited | Construction | 2025 |
| A W James Limited | Real estate | 1999 |
| A Well Woman Network UK C.I.C. | Health & social care | 2017 |
| A Wesley Air Conditioning Limited | Construction | 2003 |
| A Willis Accounts Ltd | Professional & scientific | 2018 |
| A Window Cleaning Services Limited | Administrative & support | 2023 |
| A&A Beauty Lounge Ltd | Other services | 2025 |
| A&A Training and Consultancy Ltd | Professional & scientific | 2014 |
| A&Abrickwork Ltd | Construction | 2022 |
| A&B Haig Consultants Ltd | Professional & scientific | 2023 |
| A&B Perfect Construction Ltd | Construction | 2019 |
| A&C Partners Ltd | Wholesale & retail | 2022 |
| A&H Rowan House Limited | Professional & scientific | 2024 |
| A&H Social Ltd | Hospitality | 2021 |
| A&I Humphrey Property Ltd | Real estate | 2018 |
| A&I Transport Solutions Limited | Transport & logistics | 2023 |
| A&J Butterfly Ltd | Wholesale & retail | 2023 |
| A&J Driving School Ltd | Education | 2026 |
| A&J Management Limited | Professional & scientific | 2017 |
| A&J Rental Properties Limited | Real estate | 2024 |
| A&K Consulting Ltd | Real estate | 2025 |
| A&K Top Fast Transport Ltd | Transport & logistics | 2020 |
| A&M Life Ltd | Real estate | 2022 |
| A&M Verti-Move Lifts Services Limited | Manufacturing | 2024 |
| A&R Portfolio & Developments Ltd | Real estate | 2017 |
| A&S Batchelor Property Investments Ltd | Real estate | 2020 |