| Ascot Education Consultants Limited | Education | 2015 |
| Ascot Management Holding Company Limited | Real estate | 2024 |
| Ascot Management Limited | Real estate | 2002 |
| Ascot Technology Limited | Professional & scientific | 2014 |
| Ascotts Properties Limited | Construction | 2026 |
| Aset (EUR) Ltd | Transport & logistics | 2019 |
| ASF Builders Limited | Construction | 2019 |
| ASF Care Limited | Health & social care | 2019 |
| Asfa Holdings Ltd | Financial services | 2022 |
| ASG Building Limited | Construction | 2022 |
| Asgard Power Ltd | Construction | 2020 |
| ASH & KAY Ltd | Professional & scientific | 2023 |
| ASH and Ember Cabins Limited | Hospitality | 2025 |
| ASH Construction Solutions Limited | Construction | 2015 |
| ASH Developments & Property Ltd | Real estate | 2014 |
| ASH Grove Childcare Ltd | Health & social care | 2018 |
| ASH Grove Real Estate Ltd | Real estate | 2022 |
| ASH Hill Solicitors Ltd | Professional & scientific | 2021 |
| ASH IT Limited | Other services | 2016 |
| ASH Moth Studio Ltd | Information & communication | 2024 |
| ASH Partners Limited | Real estate | 2022 |
| Asha Agnihotri V Limited | Wholesale & retail | 1997 |
| Asha Logistic Ltd | Transport & logistics | 2019 |
| Ashand Property Investments Limited | Wholesale & retail | 2021 |
| Ashani Limited | Health & social care | 2004 |
| Ashapura Ealing Limited | Real estate | 2023 |
| Ashapura Investments Limited | Real estate | 2017 |
| Ashapura Kingsbury Limited | Real estate | 2023 |
| Ashapura Limited | Real estate | 2021 |
| Asharia Limited | Financial services | 2021 |
| Ashburn Capital Ltd | Real estate | 2017 |
| Ashburton Properties Limited | Real estate | 2024 |
| Ashcon Limited | Construction | 1994 |
| Ashcrown Limited | Real estate | 1991 |
| Ashdev Group Ltd | Information & communication | 2026 |
| Asher Enterprise Limited | Manufacturing | 2026 |
| Ashford Homes Limited | Real estate | 2011 |
| Ashhva Limited | Real estate | 2025 |
| Ashif Construction Ltd | Construction | 2025 |
| Ashish Trading Limited | Wholesale & retail | 2021 |
| Ashjan Limited | Construction | 2010 |
| Ashlar Group Limited | Professional & scientific | 2025 |
| Ashlar Holdings Limited | Construction | 2021 |
| Ashlar Property Finance Limited | Construction | 2021 |
| Ashleigh Mann (Accountants) Limited | Professional & scientific | 2000 |
| Ashley CRT Freeholders Limited | Real estate | 2024 |
| Ashley Interiors Limited | Professional & scientific | 2015 |
| Ashley Nathoo & Co. Limited | Professional & scientific | 2000 |
| Ashley Wallis Peters Limited | Other services | 2016 |
| Ashmar & Co (London) Ltd | Professional & scientific | 2004 |
| Ashmi Investments Limited | Real estate | 2020 |
| Ashmin Properties Ltd | Real estate | 2021 |
| Ashmina Medical Limited | Professional & scientific | 2019 |
| Ashmore Real Estate Limited | Construction | 2020 |
| Ashmount Properties Limited | Real estate | 2000 |
| Ashnik Ltd | Real estate | 2026 |
| Ashra Building Contractors Limited | Construction | 2021 |
| Ashra Limited | Real estate | 2016 |
| Ashren Technology Limited | Information & communication | 2019 |
| Ashrey Care Limited | Health & social care | 2014 |
| Ashridge Pools Limited | Construction | 2022 |
| Ashton Shah & Co Limited | Professional & scientific | 2015 |
| Ashton Shah Services Ltd | Professional & scientific | 2025 |
| Ashumik Ltd | Real estate | 2026 |
| Ashvaka Limited | Professional & scientific | 2017 |
| Ashved Enterprise Limited | Wholesale & retail | 2022 |
| Ashvi Ltd | Wholesale & retail | 2025 |
| Ashvini Cash and Carry Limited | Wholesale & retail | 2017 |
| Ashyen Limited | Real estate | 2020 |
| Asia Air Services Limited | Manufacturing | 2019 |
| Asian Business Publications Limited | Information & communication | 1988 |
| Asian Funeral Care-Croydon Limited | Other services | 2010 |
| Asian Junction Ltd | Information & communication | 2018 |
| Asianacreations Limited | Arts & recreation | 2020 |
| Asic Integrated Solutions Ltd | Education | 2023 |
| Asidhu Retail Consultancy Ltd | Professional & scientific | 2025 |
| Asis UK Chapter 208 | Other services | 2012 |
| Asita Limited | Information & communication | 2006 |
| ASK Builders (London) Ltd | Construction | 2024 |
| ASK Business Limited | Real estate | 2022 |
| ASK Cleaning Solution Maintenance Ltd | Administrative & support | 2019 |
| ASK Data Solution Ltd | Information & communication | 2021 |
| ASK Interiors Limited | Construction | 2002 |
| ASK London Gifts Ltd | Wholesale & retail | 2026 |
| ASK Patel Limited | Real estate | 2016 |
| ASK Planning Limited | Professional & scientific | 2009 |
| ASK Property Assets Ltd | Real estate | 2025 |
| ASK Property Development Ltd | Real estate | 2021 |
| ASK Rentals Ltd | Real estate | 2009 |
| ASK Retail Limited | Wholesale & retail | 2026 |
| ASK Rupert Digital Media Ltd | Professional & scientific | 2016 |
| ASK1313 Properties Limited | Real estate | 2020 |
| Askanangel Limited | Professional & scientific | 2016 |
| Askdaisy DOT NET Limited | Information & communication | 1982 |
| Askham Services Limited | Health & social care | 2020 |
| Askham Village Community Limited | Health & social care | 1988 |
| Askung Limited | Information & communication | 2022 |
| ASL Bros Ltd | Construction | 2023 |
| Aslp Properties Limited | Real estate | 2019 |
| ASM Builders Services Limited | Construction | 2021 |