| 100 Worple Road Limited | Households | 2017 |
| 10MINUTETEST.AI Ltd | Information & communication | 2025 |
| 112 Holland Road (Kensington) Limited | Administrative & support | 2000 |
| 13 Richmond Way Limited | Real estate | 2005 |
| 1303 Property Limited | Real estate | 2022 |
| 1372 Limited | Information & communication | 2012 |
| 139 Sutherland Avenue Limited | Households | 1990 |
| 147 Chartridge Lane Management Limited | Real estate | 2015 |
| 165 Sunnyside Ltd | Households | 2016 |
| 185 Waterside Management Company Ltd | Households | 2019 |
| 1978 Developments Ltd | Real estate | 2020 |
| 1984 London Limited | Manufacturing | 2012 |
| 1ST Class Lettings Limited | Real estate | 2001 |
| 2 Hertz Ltd | Hospitality | 2024 |
| 2-4 Darvell Drive Limited | Households | 2019 |
| 21/23 Courtfield Road Management Company Limited | Households | 1983 |
| 22 Hyde Park Gate Management Limited | Households | 1991 |
| 23 Grafton Road Management Company Limited | Households | 1993 |
| 239 Berkhampstead Road Management Company Limited | Real estate | 1995 |
| 24 Green Park Bath (Management) Limited | Households | 1985 |
| 27 Onslow Gardens Limited | Households | 1996 |
| 3 Wise Monkeys Services Limited | Wholesale & retail | 2004 |
| 3-WAY Displays Limited | Manufacturing | 2000 |
| 30-32 Cranley Gardens Limited | Households | 2004 |
| 30-34 Frances Street Limited | Households | 2003 |
| 313 Capital Investments Limited | Real estate | 2022 |
| 34 Tite Street Limited | Households | 1999 |
| 37 Elvaston Place Limited | Households | 2004 |
| 38 Abercorn Place Management Company Limited | Households | 1988 |
| 3D Print Core Ltd | Professional & scientific | 2026 |
| 3NT.TECH Limited | Information & communication | 2024 |
| 3T Tax Limited | Professional & scientific | 2008 |
| 4 Askew Crescent Management Company Limited | Administrative & support | 2016 |
| 40/42 Harcourt Limited | Households | 2002 |
| 40D Street Limited | Hospitality | 2025 |
| 45 Edgcumbe Avenue Ltd | Households | 2024 |
| 4CAST Bookkeeping Limited | Professional & scientific | 2020 |
| 5 Star Security Services Ltd | Administrative & support | 2012 |
| 5, 6, 7, 8 YEW Tree Close RTM Company Limited | Households | 2021 |
| 50PLUS Publishing Limited | Information & communication | 2016 |
| 50PLUS Services Limited | Other services | 2018 |
| 52 Queen's Gate Gardens Limited | Households | 1983 |
| 67 Messina Avenue Limited | Households | 2001 |
| 7 Barton Buildings Management Company Limited | Households | 2026 |
| 72 Eaton Square Limited | Households | 1989 |
| 88 Onslow Gardens Limited | Real estate | 2022 |
| 8CATS Digital Limited | Professional & scientific | 2018 |
| 8I Limited | Financial services | 2026 |
| 9 Cleveland Place West (Bath) Residents Management Limited | Households | 1983 |
| 98 Mansfield Road RTM Limited | Households | 2024 |
| 9SR Tech Ltd | Wholesale & retail | 2021 |
| 9SR Technic Ltd | Wholesale & retail | 2018 |
| @Neotrasport Limited | Transport & logistics | 2025 |
| A & a Investments Limited | Households | 2002 |
| A & C Hobbs Limited | Construction | 2020 |
| A & M Building & Roofing Limited | Construction | 2014 |
| A B Homes (SW) Ltd | Wholesale & retail | 2021 |
| A H Taprooms Ltd | Hospitality | 2021 |
| A I Innovations Studio Ltd | Professional & scientific | 2025 |
| A Ruth & Sohn Ltd | Financial services | 2015 |
| A to Z Tailoring & Alteration Ltd | Manufacturing | 2026 |
| A&A Properties Group Ltd | Real estate | 2021 |
| A.C.E Plumbing & Heating Solutions Limited | Construction | 2024 |
| A.N.K Decorators Ltd | Construction | 2026 |
| A.P. Green Builders Limited | Construction | 1999 |
| A.Peters Ceramic Tiling Limited | Construction | 2006 |
| A.R. Equine Ltd | Professional & scientific | 2021 |
| A.R.Darvell Limited | Construction | 1969 |
| A1 Auto Solutions Ltd | Wholesale & retail | 2020 |
| A1 K9 (Chesham) Limited | Other services | 2014 |
| A1 Taxi Line Limited | Transport & logistics | 2004 |
| A105 Ltd | Arts & recreation | 2015 |
| AA Plus Group Ltd | Professional & scientific | 2025 |
| Aaco Ventures Ltd | Professional & scientific | 2021 |
| Aafsa C.N.G Alliyy Limited | Extraterritorial | 2025 |
| Aapv Properties Ltd | Real estate | 2025 |
| Aardvark Theatre Ltd | Arts & recreation | 2022 |
| AAY Associates Limited | Professional & scientific | 2019 |
| AB Homes Limited | Construction | 1990 |
| Abbotts Limited | Transport & logistics | 1997 |
| Able Tech Ltd | Professional & scientific | 2011 |
| Abrakebabra Takeway Ltd | Hospitality | 2023 |
| Abrazo Ltd | Arts & recreation | 2023 |
| ABS Consultation and Education Ltd | Education | 2023 |
| ABS Homes Ltd | Real estate | 2018 |
| Absolute Building Structures Ltd | Construction | 2011 |
| Acadia-Capito Management Consulting Ltd | Other services | 2020 |
| Access Matters Limited | Professional & scientific | 2008 |
| Acclaro Accountancy & Bookkeeping Limited | Professional & scientific | 2012 |
| Accountable Growth Ltd | Administrative & support | 2022 |
| Accounts HQ Ltd | Administrative & support | 2014 |
| Acorn & Oak Enterprises Ltd | Real estate | 2016 |
| Acquire Consultants Limited | Professional & scientific | 2014 |
| ACT - Aspire Connect Transform C.I.C. | Education | 2025 |
| Active Tyres Ltd | Administrative & support | 2022 |
| Acutum Consulting Limited | Administrative & support | 2014 |
| Acyuta Ltd | Professional & scientific | 2018 |
| AD Idem Marketing Ltd | Administrative & support | 2014 |
| Adam & SON Enterprise Limited | Wholesale & retail | 2015 |
| Adam Supplies Limited | Wholesale & retail | 2020 |