| 07 Investment Co Ltd | Financial services | 2020 |
| 10K Holdings Limited | Real estate | 2020 |
| 11 Batley Road Limited | Real estate | 2016 |
| 15PM LLP | | 2007 |
| 16 Clarendon Square Limited | Households | 2001 |
| 1ST Look Ltd | Information & communication | 1996 |
| 1ST Site Building & Landscaping Ltd | Construction | 2018 |
| 2 Guild Street Parking Limited | Real estate | 2019 |
| 22 Moreton Place Limited | Extraterritorial | 2013 |
| 223 Putney Bridge Road (Management Company) Limited | Real estate | 2001 |
| 23 East Green Drive Management Ltd | Real estate | 2015 |
| 2BELONG2 Limited | Professional & scientific | 2017 |
| 2ND GEN Roofing Ltd | Construction | 2025 |
| 3 Phase Industrial Limited | Construction | 2017 |
| 30A High Street Limited | Real estate | 2019 |
| 33 Dover ST Limited | Administrative & support | 2013 |
| 33 Minerals Mining Limited | Mining & quarrying | 2020 |
| 33 the Scullery Limited | Hospitality | 2014 |
| 3C Technology Ltd. | Information & communication | 1991 |
| 3COMP Labs UK Limited | Information & communication | 2017 |
| 3DOTZ Limited | Professional & scientific | 2017 |
| 3DPRINTWISE Ltd | Wholesale & retail | 2025 |
| 3RD EYE Technology Limited | Information & communication | 2019 |
| 43 London Road Management Company Ltd | Households | 2018 |
| 4FIFTY4 Limited | Construction | 2025 |
| 50 Henley Street Diamond and Watch Merchants Limited | Wholesale & retail | 2015 |
| 52 Degrees North Travel Ltd | Administrative & support | 2018 |
| 63 Entertainment Limited | Hospitality | 2023 |
| 72ABC RTM Company Ltd | Real estate | 2024 |
| 74 Alcester Road Limited | Real estate | 2003 |
| 75 Victoria Road Freehold Limited | Households | 2019 |
| 793 Challenge Limited | Education | 2020 |
| 7CS Culture Consultancy Ltd. | Professional & scientific | 2024 |
| 808 Management Ltd | Professional & scientific | 2018 |
| 8IGHT Sports Group Ltd | Administrative & support | 2026 |
| 97 Pro Ltd | Arts & recreation | 2018 |
| A & a Convenience Store Limited | Wholesale & retail | 2019 |
| A & D Management Investment Ltd | Professional & scientific | 2017 |
| A & G Drinks Limited | Wholesale & retail | 2015 |
| A & J Accounting Limited | Professional & scientific | 2025 |
| A & R Barber Shop Ltd | Other services | 2024 |
| A Fine Tattoo Establishment Limited | Other services | 2012 |
| A J RAY Property Ltd | Hospitality | 2025 |
| A M F Polymers (Cwmbran) Limited | Other services | 1996 |
| A New YOU Ltd | Arts & recreation | 2025 |
| A P Francis Builders Limited | Construction | 2002 |
| A Plan Building & Maintenance Services Ltd | Construction | 2005 |
| A&S White House Property Solutions Ltd | Real estate | 2021 |
| A-Line Hydraulics Limited | Administrative & support | 2008 |
| A-Line Management Limited | Administrative & support | 2014 |
| A. J. Harris Ltd | Real estate | 2024 |
| A. J. Towey Services Limited | Wholesale & retail | 2005 |
| A.J. Dalton Group Limited | Professional & scientific | 2003 |
| A.J.Ray Ltd | Construction | 2019 |
| A.S Apothecary Limited | Manufacturing | 2015 |
| A.T. Cross (Europe), Ltd. | Manufacturing | 1994 |
| Aaditya Consultancy Limited | Professional & scientific | 2026 |
| AAH Cosmetics Limited | Wholesale & retail | 2020 |
| AAP Management Ltd | Professional & scientific | 2018 |
| Abacus Commercial Holdings Ltd | Construction | 2025 |
| Abacus Family Care Homes Limited | Financial services | 2008 |
| Abbc Homes Limited | Real estate | 2023 |
| Abberley Associates Limited | Real estate | 2013 |
| Abbeydale Blinds Ltd | Extraterritorial | 2020 |
| ABC Solutions (UK) Limited | Construction | 1998 |
| Abcon Engineering Ltd | Construction | 2019 |
| Abhold Ltd | Professional & scientific | 2022 |
| Abnormal Load Escort Service Limited | Transport & logistics | 2023 |
| ACA Lifestyle Ltd | Wholesale & retail | 2025 |
| ACA Ventures Ltd | Hospitality | 2017 |
| Academic Nomads Ltd | Information & communication | 2021 |
| Accelerise Ltd | Information & communication | 2010 |
| Accord Communications Limited | Information & communication | 2018 |
| Accord Consultants Limited | Information & communication | 2022 |
| Accountable International Limited | Professional & scientific | 2021 |
| Accountants Marketplace Ltd | Extraterritorial | 2021 |
| Ace Parade Rally Limited | Administrative & support | 2014 |
| Acec Consulting Limited | Information & communication | 2017 |
| Acew Property Limited | Real estate | 2025 |
| Achayans Ltd | Wholesale & retail | 2023 |
| Acleus Properties Limited | Real estate | 2025 |
| Acmf Consulting Limited | Professional & scientific | 2018 |
| ACOMODAT8 Ltd | Real estate | 2024 |
| Acorn Construction & Property Development Ltd | Construction | 2025 |
| Acorn NPD Solutions Ltd | Professional & scientific | 2014 |
| ACR IT Solutions Ltd | Information & communication | 2002 |
| Action Properties Management & Maintenance Services Ltd | Real estate | 2012 |
| ACUITY24 Limited | Information & communication | 2024 |
| Acumen Associates Ltd | Education | 2008 |
| AD Aura Limited | Construction | 2025 |
| AD Furnishings Ltd | Manufacturing | 2026 |
| ADA and Associates Limited | Construction | 2023 |
| Adair Financial Management Ltd | Professional & scientific | 2015 |
| Adam Fenwick VFX Ltd | Information & communication | 2013 |
| Adams Roofing and Guttering Ltd | Construction | 2026 |
| Adapt and Thrive Ltd | Professional & scientific | 2019 |
| Ademen Limited | Professional & scientific | 2020 |
| ADG Developments Ltd | Real estate | 2025 |
| Admr Stratford Ltd | Real estate | 2021 |
| Adoptco Engineering Ltd | Professional & scientific | 2023 |