| 1 DMC World Ltd | Professional & scientific | 2017 |
| 102 Developments Limited | Real estate | 2021 |
| 11 Highfield Road Management Co Limited | Households | 2005 |
| 118118 Communications Ltd | Information & communication | 2019 |
| 15 Westgate Terrace Limited | Households | 2007 |
| 17 Callow Street Chelsea Limited | Professional & scientific | 1978 |
| 17 Queen's Gate Terrace Management Limited | Households | 2007 |
| 18 Verified Ltd | Information & communication | 2025 |
| 20 Mortimer Road Freehold Limited | Households | 2026 |
| 21ST Century FIX Limited | Manufacturing | 2000 |
| 24 Charles Street Limited | Households | 1990 |
| 2GOCLOUD Limited | Information & communication | 2012 |
| 3 Amigos Retail Ltd | Wholesale & retail | 2022 |
| 3 C C LLP | | 2009 |
| 3 for Luck Limited | Information & communication | 2025 |
| 360 Wheels Limited | Wholesale & retail | 2012 |
| 37 Patshull Road N.W.5. Limited | Households | 1977 |
| 3CC London Limited | Professional & scientific | 2018 |
| 3SDM Limited | Wholesale & retail | 2012 |
| 46 Hazelwood Limited | Real estate | 2017 |
| 47 Labs Ltd | Information & communication | 2022 |
| 48 Sea Road Management Company Ltd | Hospitality | 2022 |
| 59 Southampton Road Limited | Households | 2014 |
| 5M Company Limited | Real estate | 1981 |
| 61-82 Cambridge Mansions (Freehold) Limited | Households | 2011 |
| 63 ST Quintin Management Company Limited | Households | 2015 |
| 825.07 Ltd | Manufacturing | 2018 |
| A & L Services Ltd | Administrative & support | 2015 |
| A C Motor Services Limited | Wholesale & retail | 2006 |
| A F L Sector Consulting Ltd | Education | 2023 |
| A Gallagher Leisure Ltd | Hospitality | 2025 |
| A J W Construction Limited | Manufacturing | 1995 |
| A P Maritime Limited | Information & communication | 2014 |
| A P R Landscaping Services Limited | Administrative & support | 2025 |
| A P Tamar Limited | Real estate | 2021 |
| A.E. Lewis & SON Limited | Real estate | 1957 |
| A.L.Scarlett Ceramics Ltd | Arts & recreation | 2024 |
| A.T.C Estates Limited | Real estate | 2014 |
| A3 Developments Ltd | Construction | 2026 |
| Abacus Estate Management Ltd | Real estate | 2020 |
| Abbey Fire Extinguishers Ltd | Public administration | 2024 |
| Abink Limited | Wholesale & retail | 2005 |
| Abitech Systems Limited | Wholesale & retail | 2002 |
| Able Roofing Limited | Construction | 2023 |
| Accounting Focus Ltd | Professional & scientific | 2009 |
| Accounting Services (New Forest) Limited | Professional & scientific | 2003 |
| ACS Business Change Ltd | Professional & scientific | 2011 |
| Adam Barker Builds Ltd | Construction | 2024 |
| Adam Barker Property Ltd | Real estate | 2024 |
| Adcroft Build & Renovation Limited | Manufacturing | 2003 |
| Addison Marine Ltd | Professional & scientific | 2026 |
| Adelaide Owners Limited | Households | 2009 |
| Adinkra (UK) Limited | Administrative & support | 2006 |
| Adrian Charsley Associates Limited | Professional & scientific | 2020 |
| Adrian Harvey Motor Engineers Ltd | Wholesale & retail | 2005 |
| Advance Shutters Limited | Manufacturing | 2008 |
| Advanced Ecobuild Services Limited | Construction | 2000 |
| Advanced GS Ltd | Information & communication | 2018 |
| Adventure Marine Limited | Manufacturing | 2020 |
| AEH Hotels Limited | Hospitality | 2013 |
| Aerios Solutions Ltd | Professional & scientific | 2016 |
| AG Town Planning Ltd | Professional & scientific | 2016 |
| Agamemnon Boatyard Ltd. | Manufacturing | 1998 |
| Agars Garden Services Limited | Wholesale & retail | 2014 |
| Agrumi Limited | Agriculture & fishing | 2006 |
| Agrumi Tiptoe Limited | Agriculture & fishing | 2001 |
| AH Composites Ltd | Manufacturing | 2022 |
| AHD Property Limited | Real estate | 2020 |
| Airos Construction Limited | Construction | 2025 |
| Airos Developments Limited | Construction | 2022 |
| Airos Group Limited | Financial services | 2023 |
| Airos Interiors Limited | Construction | 2024 |
| Airos Racing Limited | Professional & scientific | 2025 |
| Airport Cars New Forest Ltd | Transport & logistics | 2025 |
| Ajax Machine Tools International Ltd | Manufacturing | 2009 |
| Ajax Semco LLP | | 2012 |
| AJS Accountancy Limited | Real estate | 2014 |
| Alan Farrar & SON Ltd | Construction | 2025 |
| Alan Harris Consulting Ltd | Real estate | 2023 |
| Alastor Rare Books Limited | Wholesale & retail | 2014 |
| Alex Rogers Consulting Ltd | Information & communication | 2022 |
| Alexander Perry Ltd | Information & communication | 2016 |
| Alexandra Mews (Lymington) Ltd | Households | 2008 |
| ALL Elements Acupuncture Limited | Health & social care | 2022 |
| ALL Elements Healing Limited | Health & social care | 2022 |
| ALL in One Solutions PVT Ltd | Administrative & support | 2026 |
| ALL Photography Limited | Professional & scientific | 2016 |
| ALL Saints Road Management Company Limited | Real estate | 1998 |
| Allcock Plasterers Ltd. | Construction | 2004 |
| Allcraft Marine Ltd | Professional & scientific | 2016 |
| Allcraft Marine Surveys Ltd | Professional & scientific | 2016 |
| Allport York Ltd | Administrative & support | 2015 |
| Allwood Associates Consulting Limited | Professional & scientific | 2020 |
| Almauk Ltd | Wholesale & retail | 2021 |
| Alms (Homes) Ltd | Construction | 2025 |
| ALP Technology Limited | Information & communication | 2025 |
| Alpha Lima Echo X-Ray Limited | Professional & scientific | 2024 |
| Alpha Sierra Bravo Consulting Limited | Professional & scientific | 2025 |
| Also-H Productions Limited | Arts & recreation | 2025 |
| Altair Estates Ltd | Real estate | 2013 |