| 6 Campden Grove RTM Company Limited | Households | 2023 |
| 6 Ladbroke Road Limited | Real estate | 1998 |
| 6-ARROWS INT Ltd | Wholesale & retail | 2025 |
| 65 Ladbroke Grove RTM Company Limited | Households | 2023 |
| 65-68 Burton High Street Ltd | Real estate | 2019 |
| 66 Elsham Road Limited | Households | 2001 |
| 67 Fitzjohns Avenue Management Company Limited | Households | 1985 |
| 67 ST. George's Square Limited | Households | 1990 |
| 6IXSIDE Ltd | Arts & recreation | 2024 |
| 7 Netherton Grove Freehold Limited | Households | 2017 |
| 7 Sewardstone Road Freehold Limited | Households | 2022 |
| 74 Oxford Gardens Limited | Households | 2023 |
| 76 Greencroft Gardens Limited | Households | 1991 |
| 77 Tolmers Road Residents Management Company Limited | Households | 2006 |
| 7HZ Productions Ltd | Information & communication | 2002 |
| 7TH Degree Ltd. | Information & communication | 1998 |
| 8 Qgrove Management Company Ltd | Households | 2020 |
| 80 Copenhagen Street Limited | Households | 2015 |
| 81 Sinclair Road (Management) Limited | Households | 1999 |
| 84 Ladbroke Grove Management Limited | Extraterritorial | 2010 |
| 84 New Things Ltd | Professional & scientific | 2017 |
| 91 Elgin Avenue Limited | Households | 2015 |
| 93 Oxford Gardens Management Co. Ltd | Real estate | 2000 |
| 93 ST. Gabriels Limited | Households | 2006 |
| 9491 Limited | Professional & scientific | 2017 |
| 96 Palmerston Road (Flat Management) Limited | Households | 2001 |
| 98, Maida Vale Limited | Households | 1978 |
| @White Scout Way Ltd | Households | 2022 |
| A & L General Construction Limited | Administrative & support | 2017 |
| A & S General Builders Ltd | Construction | 2018 |
| A and P Wells Ltd | Real estate | 2023 |
| A C Georgiades Ltd | Wholesale & retail | 1998 |
| A Grubb and Sons Limited | Real estate | 2023 |
| A List Events Limited | Administrative & support | 2010 |
| A M Mattock Limited | Real estate | 2014 |
| A&H Luxe Ltd | Administrative & support | 2025 |
| A&J Stuart Online Ltd | Information & communication | 2021 |
| A&J Stuart Property Ltd | Real estate | 2021 |
| A&M Project Solutions Ltd | Construction | 2018 |
| A&P Estates (Developments) Ltd | Real estate | 2015 |
| A&P Estates Ltd | Real estate | 2013 |
| A&S Randerwala Properties LLP | | 2021 |
| A&T Global Consulting Ltd | Wholesale & retail | 2017 |
| A. N. Quinn Limited | Real estate | 1989 |
| A.J. Binns Limited | Manufacturing | 1937 |
| A.M. Dairies Limited | Wholesale & retail | 2017 |
| A.N Car Wash Ltd | Other services | 2020 |
| A.N.A Autos Limited | Wholesale & retail | 2003 |
| A.N.S Hawes Ltd | Real estate | 2017 |
| A.Ts. Building Services Ltd | Construction | 2020 |
| A1 Renovations Ltd | Construction | 2026 |
| A910A Podbox Ltd | Other services | 2020 |
| AA Care Investments Ltd | Real estate | 2022 |
| AA Express Logistics Ltd | Transport & logistics | 2023 |
| AA Project Solutions Ltd | Professional & scientific | 2024 |
| Aactor Limited | Administrative & support | 1998 |
| AB Grain Trading Ltd | Wholesale & retail | 2023 |
| AB24 Ltd | Information & communication | 2011 |
| Abari I.T Solutions Ltd | Information & communication | 2023 |
| Abbey Continental Limited | Administrative & support | 1989 |
| Abbey Dean Care Home Limited | Health & social care | 2014 |
| Abbey Developments Limited | Construction | 1939 |
| Abbey Financial Limited | Professional & scientific | 1989 |
| Abbey Group Limited | Professional & scientific | 1954 |
| Abbey Group Pension Fund Limited | Administrative & support | 1975 |
| Abbey Holdings Limited | Professional & scientific | 1989 |
| Abbey Homesteads Limited | Professional & scientific | 1955 |
| Abbey Investments Limited | Construction | 1955 |
| Abbey New Homes Limited | Professional & scientific | 1987 |
| Abbey Partnership Limited | Construction | 2013 |
| Abbey Stevens Limited | Professional & scientific | 2011 |
| Abbey View Solutions Limited | Real estate | 2015 |
| Abbeymeade Limited | Professional & scientific | 2006 |
| Abbots Joinery Limited | Construction | 2015 |
| ABD Homes Ltd | Construction | 2019 |
| Abels International Moving Services Limited | Professional & scientific | 2007 |
| Abels Moving Services Limited | Transport & logistics | 1998 |
| Abels UK Moving Services Limited | Professional & scientific | 2007 |
| Abigail's Home Care Ltd | Health & social care | 2024 |
| Abltrade International Ltd | Wholesale & retail | 2022 |
| Ablydone Building Services Ltd | Construction | 2011 |
| Abofa Ltd | Administrative & support | 2019 |
| Above ALL Shadows Ltd | Professional & scientific | 2026 |
| ABP Food & Wine Ltd | Wholesale & retail | 2026 |
| ABP Group Holdings Ltd | Financial services | 2026 |
| ABP Homes Limited | Real estate | 2017 |
| ABP Houses Ltd | Administrative & support | 2018 |
| Absolute Bathroom Interiors Limited | Professional & scientific | 2021 |
| Absolute Maintenance (GB) Limited | Construction | 2012 |
| Absolute Outdoor Lifestyle Solutions Ltd | Wholesale & retail | 2022 |
| Absolute-Pools Ltd | Professional & scientific | 2019 |
| Abtakar Ltd | Real estate | 2022 |
| AC Housedesigns and Construction Ltd | Construction | 2021 |
| ACA Security Design Ltd | Professional & scientific | 2026 |
| Accord Business Consulting Ltd | Professional & scientific | 2017 |
| Accounts ETC Ltd | Professional & scientific | 2003 |
| Accountx Partners Ltd | Professional & scientific | 2018 |
| Accreditus Limited | Other services | 2002 |
| Accurate Economic Consulting Limited | Professional & scientific | 2024 |
| Ace Ecom Ltd | Wholesale & retail | 2025 |