| A&D Holidays Limited | Administrative & support | 2010 |
| A&E Fire and Security (Holdings) Limited | Public administration | 2019 |
| A&E Fire and Security Ltd | Other services | 1978 |
| A&G Tech Ltd | Professional & scientific | 2024 |
| A&K Corp. Limited | Financial services | 2019 |
| A&K DPD Limited | Financial services | 2025 |
| A&K Finance Limited | Financial services | 2022 |
| A&K International Holdings Limited | Financial services | 2022 |
| A&K Management Services Ltd | Administrative & support | 2023 |
| A&L Home Rentals Limited | Real estate | 2022 |
| A&M Young Properties Ltd | Real estate | 2018 |
| A&O Luxury Properties Limited | Real estate | 2022 |
| A&S Services (Cheltenham) Limited | Financial services | 2014 |
| A'Court Williams Limited | Professional & scientific | 1999 |
| A. J. Bullingham Building Services Ltd | Construction | 2003 |
| A. J. Bullingham Landscaping & Gardening Contractors Ltd | Other services | 2003 |
| A. Samuel Enterprises Ltd | Education | 2024 |
| A.B Brasserie Ltd | Hospitality | 2019 |
| A.Clarke Design Ltd | Professional & scientific | 2016 |
| A.D.D Dinamic Transport Ltd | Transport & logistics | 2025 |
| A.F. Plant & Engineering Services Ltd | Manufacturing | 2017 |
| A.H.I. Developments Ltd | Construction | 2003 |
| A.J.M Spares Ltd | Wholesale & retail | 2021 |
| A.P.W. Plumbing and Heating Ltd | Construction | 2015 |
| A.S. Rota Ltd | Wholesale & retail | 2024 |
| A.S.C. Properties Limited | Real estate | 1991 |
| A.T. Gifford's Ltd | Hospitality | 2023 |
| A.T. Surveying Limited | Construction | 2003 |
| A.T.E Services (Cheltenham) Limited | Information & communication | 2007 |
| A1 Storage Limited | Transport & logistics | 2005 |
| A1TELECOMMS Ltd | Professional & scientific | 2024 |
| A2 Consultants Quality, Compliance and ISO Systems Limited | Professional & scientific | 2025 |
| A2B Removals Nationwide Limited | Transport & logistics | 2017 |
| A2B4U Limited | Transport & logistics | 2017 |
| A2Z Ecom Limited | Information & communication | 2019 |
| A3M Projects Limited | Professional & scientific | 2025 |
| A40 Fitness Limited | Arts & recreation | 2021 |
| A40 Hideout Ltd | Hospitality | 2023 |
| A4JWA Ltd | Administrative & support | 2010 |
| AA & CL Price Limited | Real estate | 2021 |
| AA Appliance Holdings Ltd | Financial services | 2025 |
| AA Proptech Consulting Ltd | Professional & scientific | 2025 |
| Aadouglas Limited | Professional & scientific | 2014 |
| Aafw Limited | Real estate | 2011 |
| Aardvark Installations Ltd | Construction | 2021 |
| Aardvark Jewellery Limited | Manufacturing | 2003 |
| Aavaas Limited | Real estate | 2018 |
| AB Cost Limited | Professional & scientific | 2026 |
| AB Gallery Ltd | Real estate | 2019 |
| AB Managed Services Limited | Information & communication | 2023 |
| Abard Exterior Decorating Limited | Construction | 2023 |
| Abard Property Maintenance Limited | Construction | 2023 |
| Abbey Business Interiors Holdings Limited | Financial services | 2017 |
| Abbey Business Interiors Limited | Wholesale & retail | 2014 |
| Abbey Business Interiors Trustees Limited | Financial services | 2023 |
| Abbey Court (Winchcombe) Maintenance Limited | Households | 1983 |
| Abbey Design Associates (Gloucester) Limited | Administrative & support | 2006 |
| Abbey Leisure Interiors Limited | Administrative & support | 2009 |
| Abbey Mills Limited | Real estate | 1985 |
| Abbey Office Interiors Limited | Professional & scientific | 1990 |
| Abbey Plumbing Supplies Limited | Wholesale & retail | 2008 |
| Abbeyholme Stables Limited | Real estate | 2020 |
| Abbeywood International Recruitment Limited | Administrative & support | 1998 |
| Abbisen Ltd | Real estate | 2022 |
| Abbiss Drinks Company Limited | Manufacturing | 2017 |
| Abbotsdene Management Company Limited | Households | 1992 |
| Abbrieka Equipment Co Ltd | Wholesale & retail | 2025 |
| ABC Pavilions and Marquees Limited | Administrative & support | 2022 |
| ABC Plant Training Limited | Construction | 2007 |
| ABC Services Cheltenham Ltd | Wholesale & retail | 2025 |
| ABE Estates Management Ltd | Real estate | 2024 |
| Abercrombie & Kent Europe Limited | Administrative & support | 1988 |
| Abercrombie & Kent Global Travel Limited | Financial services | 2019 |
| Abercrombie & Kent Limited | Administrative & support | 1972 |
| Abercrombie & Kent North & Central Asia Limited | Administrative & support | 2008 |
| Abercrombie & Kent Philanthropy | Professional & scientific | 2011 |
| Abergelli Farm Bess Limited | Energy | 2022 |
| ABH Media Ltd | Information & communication | 2015 |
| ABH Touring Limited | Arts & recreation | 2019 |
| ABILITY2BUILD Ltd | Real estate | 2022 |
| Abinco Ltd | Real estate | 2018 |
| Abington Street Property Fund Limited Partnership | | 2008 |
| Abitalia Contracts Limited | Construction | 2023 |
| Abitalia Ltd | Wholesale & retail | 2006 |
| ABL Medical Aesthetics Ltd | Other services | 2023 |
| Ablington Ltd. | Hospitality | 1995 |
| Ablington Management Company Limited | Households | 2011 |
| About Time Design Ltd. | Administrative & support | 2004 |
| Above the Fold Digital Marketing Ltd | Information & communication | 2014 |
| Above the Line Productions Limited | Information & communication | 2012 |
| Abroad Education Bangladesh Limited | Education | 2025 |
| Absentminders Limited | Other services | 1976 |
| Absolute Aerospace Consultancy Ltd | Professional & scientific | 2011 |
| Absolute Cars Cheltenham Ltd | Wholesale & retail | 2012 |
| Absolutely Publishing & Media Limited | Hospitality | 1997 |
| Abson Holdings Limited | Financial services | 2018 |
| Absorpers Limited | Real estate | 1994 |
| ABZ Cost Ltd | Professional & scientific | 2024 |
| Ac&H Construction Ltd | Construction | 2022 |
| Acacia Memorials Limited | Professional & scientific | 2014 |