| A R Troci Construction Ltd | Construction | 2025 |
| A R Vision Limited | Information & communication | 2014 |
| A R Zoom Ltd | Wholesale & retail | 2025 |
| A Rabbit's Foot Ltd | Information & communication | 2022 |
| A RAE of Therapy Ltd | Other services | 2025 |
| A Rahe Limited | Arts & recreation | 2008 |
| A Rahman Services Ltd | Transport & logistics | 2023 |
| A Rama Consulting Ltd | Professional & scientific | 2022 |
| A Ramsden Holdco Limited | Energy | 2026 |
| A Rana Consultancy Ltd | Health & social care | 2022 |
| A Rare Case Ltd | Wholesale & retail | 2025 |
| A Rasoolco Ltd | Administrative & support | 2016 |
| A Rated Ltd | Extraterritorial | 2015 |
| A Real Place Limited | Information & communication | 2021 |
| A Reality Ltd | Professional & scientific | 2020 |
| A Recruitment Consultant (ARC) Limited | Administrative & support | 2017 |
| A Regal Touch Ltd. | Hospitality | 2015 |
| A Rentals Ltd | Real estate | 2025 |
| A Reverie Limited | Information & communication | 2025 |
| A Rich Construction Ltd | Construction | 2018 |
| A Richards Consulting Ltd | Professional & scientific | 2019 |
| A Richards Property LLP | | 2021 |
| A Ricochet Ltd | Professional & scientific | 2024 |
| A Roberts Construction Limited | Construction | 2025 |
| A Robinson Floors Ltd | Construction | 2026 |
| A Rocha International | Professional & scientific | 2009 |
| A Rocha Limited | Professional & scientific | 1984 |
| A Room in My House Limited | Manufacturing | 2007 |
| A Room in Town (Group) Ltd | Real estate | 2016 |
| A Room in Town (K Cross) Ltd | Real estate | 2020 |
| A Room London Limited | Wholesale & retail | 2025 |
| A Rose Services Ltd | Other services | 2023 |
| A Ruben Ltd | Construction | 2013 |
| A Ruddy Good Recovery Ltd | Transport & logistics | 2026 |
| A Running Commentary Ltd | Information & communication | 2015 |
| A Running Stitch Film Limited | Information & communication | 2025 |
| A S a Scrap & Metal Waste Trading UK Ltd | Water & waste | 2025 |
| A S Athletics Limited | Arts & recreation | 2017 |
| A S B-K Trade Ltd | Wholesale & retail | 2010 |
| A S Bassi Investments Ltd | Real estate | 2024 |
| A S Bose Industrials and Commodities Limited | Wholesale & retail | 2019 |
| A S Coded Welding Ltd | Construction | 2013 |
| A S Commercial Holdings Limited | Professional & scientific | 1996 |
| A S Commercial Property Limited | Real estate | 2016 |
| A S Comp Ltd | Other services | 2019 |
| A S Connect Ltd | Wholesale & retail | 2021 |
| A S Courier Services Ltd | Transport & logistics | 2026 |
| A S Dulahi Tutors Limited | Education | 2025 |
| A S Events Ltd | Hospitality | 2026 |
| A S Extra Services Ltd | Construction | 2026 |
| A S Financial Limited | Financial services | 2009 |
| A S Force Construction Ltd | Construction | 2024 |
| A S Fresh Fish Limited | Wholesale & retail | 2019 |
| A S Fresh Produce Limited | Wholesale & retail | 2013 |
| A S General Trading Limited | Extraterritorial | 2015 |
| A S Gill Ltd | Information & communication | 2019 |
| A S Global Logistics Limited | Transport & logistics | 2015 |
| A S Hair & Beauty Ltd | Other services | 2009 |
| A S Harrison Ltd | Construction | 2022 |
| A S Installations Limited | Manufacturing | 2022 |
| A S International Ltd | Wholesale & retail | 2024 |
| A S Leisure Properties Limited | Real estate | 1998 |
| A S M Talent Europe Limited | Administrative & support | 2021 |
| A S M Talent Ltd. | Administrative & support | 2013 |
| A S Management & Building Consultancy Ltd | Construction | 2023 |
| A S Multi Services Ltd | Real estate | 2025 |
| A S Private Fitness Ltd | Arts & recreation | 2017 |
| A S Property Management Services Limited | Real estate | 2021 |
| A S R Property Limited | Real estate | 2024 |
| A S Securities Limited | Real estate | 1976 |
| A S Security Solutions Limited | Administrative & support | 2021 |
| A S Solutions London Ltd | Professional & scientific | 2022 |
| A S Sparkling Shine Limited | Construction | 2024 |
| A S Travel & Conference Services Limited | Administrative & support | 2006 |
| A S Uhomes Ltd | Real estate | 2026 |
| A S Valeting Ltd | Other services | 2020 |
| A Saba & G Saba Ltd | Other services | 2019 |
| A Salehi Ltd | Other services | 2016 |
| A Samatar TM Ltd | Construction | 2024 |
| A Samson Limited | Construction | 2020 |
| A Scott Films Ltd | Information & communication | 2025 |
| A Scott Productions Ltd | Information & communication | 2015 |
| A Secker Consulting Ltd | Professional & scientific | 2025 |
| A Select FEW Ltd | Professional & scientific | 2025 |
| A Service Books Ltd | Information & communication | 2025 |
| A SET UP Ltd | Professional & scientific | 2026 |
| A Sethi Accessories Limited | Wholesale & retail | 2021 |
| A Sethi Ltd | Health & social care | 2011 |
| A Seyfried Limited | Information & communication | 2009 |
| A Shaabani Ltd | Professional & scientific | 2024 |
| A Shade Greener (F2) Ltd | Energy | 2011 |
| A Shade Greener (F8) LLP | | 2011 |
| A Shah Trading Ltd | Financial services | 2025 |
| A Shahani Ltd | Professional & scientific | 2019 |
| A Shareholder Newco Limited | Financial services | 2024 |
| A Shehi Construction Ltd | Construction | 2026 |
| A Shepherd's Night Ltd | Hospitality | 2026 |
| A Shiny Valeting Ltd | Other services | 2018 |
| A SHY Girl Social Ltd | Professional & scientific | 2026 |
| A Silva Studio Limited | Health & social care | 2013 |