| "THE Catch": ST James Care Provision Ltd. | Administrative & support | 2006 |
| 05482385 Limited | Financial services | 2005 |
| 1 Stop Plumbing & Green Energy Centre Limited | Wholesale & retail | 2010 |
| 16 Highbury New Park Limited | Households | 1999 |
| 1909 Holdings Ltd | Construction | 2016 |
| 1909 Leisure Ltd | Financial services | 2018 |
| 1STREP Ltd | Wholesale & retail | 2021 |
| 2J Facades & Interiors Ltd | Construction | 2022 |
| 388 Queensbridge Road Property Management Company Limited | Extraterritorial | 2012 |
| 52 Avenue Road Limited | Construction | 2021 |
| 52 Avenue Road Management Company Limited | Households | 2023 |
| 63-68 Chelsea Square Limited | Households | 2019 |
| 7 of Diamonds Ltd | Administrative & support | 2024 |
| 8STEPSPM Ltd | Professional & scientific | 2026 |
| 979 Solutions Limited | Hospitality | 2018 |
| 98 Baker Street (Manco) Limited | Households | 2022 |
| A & C Townley Limited | Manufacturing | 2006 |
| A & D Asset Release Limited | Real estate | 2012 |
| A & S Design & Build (NW) Limited | Other services | 2012 |
| A F Fasteners Limited | Manufacturing | 1998 |
| A O M L Packaging Limited | Manufacturing | 2005 |
| A P H Commercial Property Limited | Financial services | 2017 |
| A P H Financial Solutions Limited | Financial services | 2015 |
| A T Taylor Inspection Services Limited | Professional & scientific | 2013 |
| A&Hp Property Ltd | Real estate | 2026 |
| A.C. Transport Services Limited | Transport & logistics | 2015 |
| A2Z Fitness U.K Ltd | Arts & recreation | 2021 |
| AAH Engineering Ltd | Professional & scientific | 2024 |
| Aava Wellness Limited | Other services | 2026 |
| AB Contracting Ltd | Professional & scientific | 2025 |
| AB Safety NW Limited | Construction | 2024 |
| Abbie Dorman Design Limited | Professional & scientific | 2023 |
| ABC Emergency Skills Ltd | Education | 2025 |
| Aberfeldy Associates Limited | Administrative & support | 2003 |
| Abmm Enterprises Ltd | Hospitality | 2026 |
| Above ALL Window Cleaning Ltd | Administrative & support | 2026 |
| AC Tiling Ltd | Other services | 2012 |
| Accounting for Artists Ltd | Professional & scientific | 2018 |
| Active Communities for Life CIC | Education | 2018 |
| AD Solutions 2023 Limited | Wholesale & retail | 2023 |
| Adam Corbally's Love Life Limited | Other services | 2012 |
| Adapt and Evolve Ltd | Arts & recreation | 2025 |
| Adaptive Gaming Ltd | Administrative & support | 2019 |
| Adaptive Gaming Youth & Community CIC | Education | 2025 |
| Addison's Interiors Ltd | Wholesale & retail | 2026 |
| Adfp Community Interest Company | Education | 2021 |
| Adfp Services Limited | Education | 2022 |
| Adrian Lambert Photography Limited | Professional & scientific | 2012 |
| Advance Recruitment Group Ltd | Administrative & support | 2019 |
| Advanced Cellular Engineering Ltd | Information & communication | 2021 |
| Advanced Foundation Technology Limited | Construction | 2011 |
| Adventures & Experiences Ltd | Information & communication | 2022 |
| Adyan Khan & Co. Ltd | Wholesale & retail | 2026 |
| Aecw Business Consultants Ltd | Professional & scientific | 2024 |
| Aesthetics in the Peaks Limited | Other services | 2023 |
| Aintelligent Technologies Ltd | Information & communication | 2025 |
| Air Pure Services Ltd | Professional & scientific | 2023 |
| Airsistance Ltd | Energy | 2025 |
| AJ OFF Licence Ltd | Wholesale & retail | 2023 |
| AJC Conversions Ltd | Manufacturing | 2014 |
| AJR Consult Ltd | Administrative & support | 2022 |
| AK NDT Services Ltd | Professional & scientific | 2026 |
| Alan Computing Limited | Information & communication | 2012 |
| Alan H Schofield Ltd | Wholesale & retail | 2012 |
| Alberti Commercial Tiling Limited | Construction | 2016 |
| Alchemy Crystal Bowls Limited | Other services | 2026 |
| Alderson Consulting Ltd | Professional & scientific | 2026 |
| Alford Flooring Ltd | Construction | 2019 |
| Alisha Palmowski Racing Promotions Ltd | Professional & scientific | 2021 |
| Alliance Nexus Consulting Limited | Professional & scientific | 2024 |
| ALM HR Consultancy Limited | Administrative & support | 2019 |
| Aloe Staffing Ltd | Hospitality | 2024 |
| Alphabet School Books Limited | Information & communication | 2013 |
| Alport Consulting Limited | Information & communication | 2025 |
| ALS Private Hire Ltd | Transport & logistics | 2019 |
| AM and EM Properties Ltd | Real estate | 2025 |
| Amaterra Limited | Professional & scientific | 2017 |
| Amber RG Medical Limited | Health & social care | 2022 |
| Ambitions Travel Recruitment and Training Limited | Administrative & support | 2022 |
| Amdec Industrial Products Limited | Manufacturing | 1993 |
| Amdec Limited | Professional & scientific | 1991 |
| AMP Aircraft Engineering Limited | Manufacturing | 2019 |
| Ampup Electrical Solutions Ltd | Construction | 2024 |
| AN Global Enterprises Ltd | Wholesale & retail | 2020 |
| AN Global Investments Ltd | Real estate | 2021 |
| Analytical Direction Limited | Professional & scientific | 2015 |
| Anason Cafe Ltd | Hospitality | 2024 |
| Anchor and Rise Ltd | Health & social care | 2025 |
| Andrew Wood Vehicle Repairs Limited | Wholesale & retail | 2012 |
| Andy Bratt Associates Limited | Information & communication | 2024 |
| Annabelle Langhorn Landscape Planning Ltd | Professional & scientific | 2022 |
| Ansari Property Developments Ltd | Real estate | 2024 |
| Antomic Limited | Administrative & support | 2019 |
| Aotstudios Ltd | Information & communication | 2015 |
| AP & OB Limited | Wholesale & retail | 2021 |
| Applecross Solutions Ltd | Administrative & support | 2015 |
| Applyinsights Ltd | Information & communication | 2024 |
| APS Brickwork & Stonework Ltd | Construction | 2019 |
| Archad Engineering Ltd | Manufacturing | 2016 |
| Arlom Limited | Construction | 2005 |