| 19 Broadwater Road (Worthing) Limited | Other services | 2010 |
| 2 Mark Property Ltd | Real estate | 2002 |
| 20SIX (South East) Ltd | Construction | 2010 |
| 4B Homes Limited | Construction | 2026 |
| 7 Day Protein FIX Ltd | Wholesale & retail | 2025 |
| A Green Plastering Ltd | Construction | 2017 |
| A&E Autos Ltd | Wholesale & retail | 2023 |
| A&H Roofing and Building Ltd | Construction | 2025 |
| Abilitea Place Ltd | Hospitality | 2024 |
| About People Pro Ltd | Professional & scientific | 2025 |
| Abraxian Ltd | Manufacturing | 2012 |
| Acacia Groundcare Equipment Rental Limited | Administrative & support | 2006 |
| Acacia Groundcare Group Ltd | Financial services | 2025 |
| Accountancy & Business Matters Limited | Professional & scientific | 2004 |
| Ace Stunts Incorporated Ltd | Administrative & support | 2025 |
| Ace Stunts Ltd | Administrative & support | 2010 |
| Ach&Co (UK) Ltd | Professional & scientific | 2016 |
| Acrobody Ltd | Arts & recreation | 2019 |
| Adam Wildi Ltd | Other services | 2016 |
| Adamsons South East Ltd | Professional & scientific | 2015 |
| Adapt Mobility Limited | Health & social care | 2009 |
| Adar Chocolates Limited | Administrative & support | 2020 |
| Adelaide Homes (Sussex) Limited | Real estate | 1995 |
| Adelaide Property Holdings Limited | Professional & scientific | 1994 |
| Adelaide Property Management Limited | Real estate | 1989 |
| Adelaide's Cars Ltd | Transport & logistics | 2018 |
| Adlam & Beadle Properties Limited | Real estate | 2005 |
| ADR Tippers (Bristol) Ltd | Transport & logistics | 2017 |
| Aerial and Handling Services Limited | Administrative & support | 2009 |
| Aero Flooring Limited | Other services | 2024 |
| Aero-Clean Limited | Administrative & support | 2018 |
| African Integrity Gold Ltd | Professional & scientific | 2024 |
| Afterthought Group Ltd | Information & communication | 2016 |
| Agile Media Limited | Information & communication | 2008 |
| Airpowder Ltd | Extraterritorial | 2008 |
| Airscale Pro Ltd | Manufacturing | 2025 |
| AJ Resources Advisory Ltd | Professional & scientific | 2026 |
| Alauda Limited | Extraterritorial | 2015 |
| Albert Johnson Ltd | Construction | 2020 |
| Alchemist Finance Solutions Ltd | Financial services | 2025 |
| Alison Turner Consulting Ltd | Other services | 2008 |
| ALL That Music Limited | Other services | 2003 |
| Allan Bell Consulting Limited | Professional & scientific | 2005 |
| Allcommunications Ltd | Professional & scientific | 2024 |
| Alphabet Bacteria Cleansing Ltd | Administrative & support | 2024 |
| Alphabet Sports Limited | Information & communication | 2011 |
| Alpine Preservation Ltd | Construction | 2003 |
| Alpine Preservations Limited | Construction | 1983 |
| Andermatt Biocontrol UK Limited | Manufacturing | 2017 |
| Andrew's Decorating Limited | Construction | 2009 |
| Anfield Consultancy Services Ltd | Financial services | 2023 |
| Angell Services Limited | Administrative & support | 2019 |
| Anglo Zimbabwe Group PLC | Financial services | 2023 |
| Anglo Zimbabwe Mining Ltd | Mining & quarrying | 2023 |
| Anglo-Dutch Dredging Company Limited | Construction | 1968 |
| Annawoorich Ltd | Administrative & support | 2017 |
| Ansty House Holdings Limited | Financial services | 2025 |
| Anvil Developments Limited | Construction | 2018 |
| Aquatech Drain Services Limited | Water & waste | 2013 |
| ARC9 Ltd | Professional & scientific | 2024 |
| Arci-Build Limited | Real estate | 2006 |
| Ardea International Ltd. | Extraterritorial | 2016 |
| Arkanarton Management Limited | Administrative & support | 2018 |
| ARL Property Ltd | Real estate | 2024 |
| Art in Place Sussex CIC | Arts & recreation | 2022 |
| Arthouse Films Limited | Information & communication | 2014 |
| AS Good AS New Ltd | Construction | 2010 |
| Ashcroft London Limited | Administrative & support | 2019 |
| Askari Aeroparts Limited | Manufacturing | 2003 |
| Astor Property Developers Limited | Real estate | 2006 |
| Atom Packaging Limited | Wholesale & retail | 1995 |
| Audiocircus Limited | Manufacturing | 2001 |
| Austin Swimming Pool & Electrical Services Limited | Administrative & support | 2016 |
| Auto Body Art Ltd | Wholesale & retail | 2022 |
| Aviation Marine (Services) Limited | Transport & logistics | 2004 |
| B Chaudhary Limited | Wholesale & retail | 2018 |
| Baba Wren Ltd | Agriculture & fishing | 2022 |
| Badger Print Southern Ltd | Manufacturing | 2014 |
| Balanced Chiropractic Limited | Health & social care | 2012 |
| Bank House Electric Gates LLP | | 2011 |
| Bank House Gates Distribution LLP | | 2025 |
| Barb Ltd | Administrative & support | 2012 |
| Barnes Wood Associates LLP | | 2017 |
| BDS Aviation Limited | Transport & logistics | 2015 |
| BEE Publishing Ltd | Information & communication | 2018 |
| Beeinspiredfarm Ltd | Agriculture & fishing | 2020 |
| Beelzebab Ltd | Hospitality | 2016 |
| Being United | Health & social care | 2022 |
| Bejewelled Management Ltd | Professional & scientific | 2023 |
| Belrose Leisure Limited | Administrative & support | 2023 |
| Benjamin Allen Construction Ltd | Construction | 2015 |
| Benjamin Allen Properties Ltd | Real estate | 2017 |
| Bespoke Security Sussex Ltd | Administrative & support | 2015 |
| Bhouse Clinic Limited | Health & social care | 2014 |
| Big Wide Window Limited | Real estate | 2018 |
| Biophillic Homes Ltd | Construction | 2007 |
| Birmingham Flower Rentals Ltd | Administrative & support | 2017 |
| Blacklands Management Ltd | Administrative & support | 2018 |
| Bloomberg Waste Services Ltd | Water & waste | 2022 |
| Blue Barn Properties Ltd | Real estate | 2016 |