| 123 Consultant Ltd | Information & communication | 2019 |
| 139 Trinity Avenue (Llandudno) Limited | Real estate | 2003 |
| 1701 Brand Limited | Administrative & support | 2020 |
| 2JCP Limited | Professional & scientific | 2016 |
| 32 Clifton Road Freehold Limited | Households | 1997 |
| 5 Speed Limited | Wholesale & retail | 2021 |
| 6 Arts Pluss Ltd | Wholesale & retail | 2025 |
| A & D Edwards Ltd | Administrative & support | 2015 |
| A Certain Vintage Limited | Professional & scientific | 2022 |
| A.B. GEE of Ripley Limited | Wholesale & retail | 1985 |
| A.C Window Cleaners Limited | Administrative & support | 2019 |
| A.I.M Commercial Services Limited | Transport & logistics | 2008 |
| AA Tree Surgeons Limited | Administrative & support | 2015 |
| Aa&S Property Management Limited | Real estate | 2025 |
| Abbott’S Plumbing & Heating Ltd | Construction | 2021 |
| Able Body Company Ltd | Professional & scientific | 2017 |
| ACB Cosmetics Ltd | Other services | 2019 |
| Accounting Matters Limited | Professional & scientific | 2002 |
| Ace Inspirations Ltd | Wholesale & retail | 2023 |
| Adams Wilkinson Finance Ltd | Professional & scientific | 2023 |
| Addit Consultancy Ltd | Professional & scientific | 2024 |
| Adrian Ward Limited | Construction | 2003 |
| Advanced Design Electrical Limited | Construction | 2022 |
| Aegd Group Limited | Wholesale & retail | 2026 |
| Afrifoods Hub Limited | Wholesale & retail | 2024 |
| Agnidev Limited | Wholesale & retail | 2010 |
| Agri Plant Services (Pentrich) Ltd | Manufacturing | 2025 |
| Air-Log Pneumatic Tube Systems UK Ltd | Manufacturing | 2024 |
| Airport Transfers Derby (UK) Ltd | Transport & logistics | 2026 |
| AJ UK Convenience Store Ltd | Other services | 2021 |
| Aktiv Accounts Limited | Professional & scientific | 2006 |
| Albion News Ltd | Wholesale & retail | 2023 |
| ALL Agreed Limited | Real estate | 2019 |
| ALL Cable Solutions Limited | Construction | 2003 |
| ALL Trade Supplies (Ilkeston) Ltd | Wholesale & retail | 2018 |
| Alla Moda Midlands Limited | Health & social care | 2013 |
| Allsop Housing Ltd | Real estate | 2025 |
| Alma Engineering Limited | Professional & scientific | 2017 |
| Altaras International Worcester Limited | Manufacturing | 2011 |
| Alton Estates (Plymouth) Limited | Real estate | 1939 |
| ALW Security Systems Limited | Administrative & support | 2022 |
| Alztec Limited | Professional & scientific | 2022 |
| Ambasol Limited | Information & communication | 2005 |
| Amber First AID Training Services Ltd | Extraterritorial | 2016 |
| Amber Heights Consulting Limited | Professional & scientific | 2017 |
| Amber Sound FM | Information & communication | 2007 |
| Amber Tyre & Auto Centre Limited | Wholesale & retail | 2003 |
| Amber Valley Property Developments Limited | Construction | 2006 |
| Amber Valley Roofing Limited | Construction | 2024 |
| Amberley Farm Management Company Limited | Water & waste | 1998 |
| Amphos Energy Ltd | Professional & scientific | 2025 |
| Andrew Revill Glazing Ltd | Construction | 2015 |
| Andrew Stone Home Improvements Limited | Construction | 2017 |
| Anico (Properties) Limited | Real estate | 2004 |
| ANM REC Limited | Administrative & support | 2025 |
| Anneva Holdings Limited | Financial services | 2024 |
| Another Way Wellbeing Ltd | Health & social care | 2025 |
| Anwyn Collectibles Ltd | Wholesale & retail | 2011 |
| Apex Autos Derby Limited | Wholesale & retail | 2024 |
| API AVI Store Ltd | Wholesale & retail | 2022 |
| Aptus Building Solutions Ltd | Construction | 2022 |
| ARA Healthcare Enterprises Limited | Wholesale & retail | 2023 |
| ARB Glaze and Home Improvements Ltd | Construction | 2024 |
| Archway Funeral Service Limited | Other services | 2016 |
| Arcsus Property Two Limited | Real estate | 2026 |
| ARK Electrical Contractors Limited | Construction | 2017 |
| Arrex Group Ltd | Professional & scientific | 2018 |
| Artisan Craft India Ltd | Wholesale & retail | 2024 |
| AS Building Group Limited | Administrative & support | 2016 |
| AS Buildings Limited | Administrative & support | 2016 |
| Ashkirk Estates Limited | Real estate | 2019 |
| Ashr Estates Limited | Real estate | 2020 |
| Astrobolt Limited | Extraterritorial | 2017 |
| Atech Projects Limited | Professional & scientific | 2019 |
| Athenaeum Limited | Information & communication | 1999 |
| Atprop Holdings Ltd | Financial services | 2024 |
| Atrico Software Ltd | Information & communication | 2014 |
| Aurea Skin Expert Ltd | Wholesale & retail | 2026 |
| Auto Body Tech 22 Ltd | Wholesale & retail | 2025 |
| Auto Prep Solutions Ltd | Wholesale & retail | 2023 |
| Automotive Software Ltd | Information & communication | 2019 |
| Automotive Utopia Car Club Ltd | Information & communication | 2024 |
| AW Lancashire Limited | Health & social care | 2006 |
| AXE Edge Industry Services Ltd | Transport & logistics | 2026 |
| AZ Steel Limited | Manufacturing | 2024 |
| B Wilson Plumbing and Heating Ltd | Construction | 2021 |
| B.K.S. Electrical Supplies Limited | Construction | 1987 |
| Baddesley & Grendon Pre-School Ltd | Education | 2013 |
| Bakewell Ice Cream Limited | Hospitality | 2026 |
| Ball Engineering Limited | Professional & scientific | 2022 |
| Ball EYE Quarry Limited | Mining & quarrying | 2023 |
| BAM Nutrition Ltd | Wholesale & retail | 2021 |
| Bankwood Limited | Professional & scientific | 2003 |
| Bare Face Beauty Aesthetic Ltd | Other services | 2023 |
| Bargain World (SY) Limited | Wholesale & retail | 2023 |
| Barlow Property Consultancy Limited | Professional & scientific | 2007 |
| Bay Studios Hair Limited | Other services | 2020 |
| BB Supervision Ltd | Agriculture & fishing | 2025 |
| Beale & Croxall Hairdressing Ltd | Other services | 2024 |
| Beardsley Holdings Limited | Real estate | 2022 |