| AS Edge Investments Limited | Tenby | 2025 |
| AS Engineering Holdings Limited | Bicester | 2023 |
| AS Equity Partners Ltd | London | 2019 |
| AS Equity Partners UK Ltd | London | 2019 |
| AS Fairmont Holdings Limited | Huddersfield | 2026 |
| AS Family Office Limited | London | 2025 |
| AS Financial Management Limited | Exeter | 2023 |
| AS Fortis Ltd | Kington | 2026 |
| AS From Limited | Stansted | 2010 |
| AS Group Holdings Limited | Frome | 2020 |
| AS Heartful Care Holdings Ltd | Birmingham | 2025 |
| AS Holdco Limited | High Wycombe | 2023 |
| AS Hope Private Ltd | London | 2023 |
| AS Hothi Holdings Ltd | Newcastle Upon Tyne | 2022 |
| AS Infra Hyper UK Ltd | London | 2022 |
| AS Infrastructure Investments UK Ltd | London | 2025 |
| AS International Group Ltd | London | 2025 |
| AS International Holdings Limited | London | 2022 |
| AS International Services Limited | London | 2022 |
| AS Invest Capital Ltd | London | 2026 |
| AS Investco Ltd | London | 2025 |
| AS Investment Holdings Limited | London | 2018 |
| AS Mallick Ltd | Nottingham | 2025 |
| AS Marketing Ltd | Northampton | 2025 |
| AS Media GRP Ltd | Lytham St. Annes | 2025 |
| AS Midco Limited | High Wycombe | 2023 |
| AS Nominee Limited | Chester Le Street | 2026 |
| AS One Holdings Limited | Coventry | 2018 |
| AS Opco Limited | High Wycombe | 2023 |
| AS Payment Solutions Ltd | Brighton | 2026 |
| AS PBL Limited | Chichester | 2023 |
| AS RE Holdco Limited | London | 2025 |
| AS Realty Holdings Limited | Leytonstone | 2021 |
| AS Roberts Holdings Limited | Leighton Buzzard | 2024 |
| AS Siddeeq Holdings Limited | Bolton | 2024 |
| AS Topco Limited | Stoke-On-Trent | 2021 |
| AS Union Holdco EUR Limited | London | 2024 |
| AS Union Holdco UK Limited | London | 2022 |
| AS Venture Capital Partners Limited | Bradford | 2025 |
| AS Wealth Management Limited | Rainham | 2014 |
| AS YOU Were Limited | Leicester | 2017 |
| As.G Nominees Limited | Manchester | 2018 |
| AS1 Capital Ltd | Birmingham | 2024 |
| AS1 Sports Bidco Limited | London | 2024 |
| AS1 Sports Holdings Limited | London | 2024 |
| AS1 Sports Midco Limited | London | 2024 |
| AS123 Investment Company Limited | Newport | 2026 |
| AS2 Holdings Ltd | London | 2026 |
| AS22 Holdings Ltd | London | 2022 |
| ASA Asset Holdings Ltd | London | 2025 |
| ASA Group Holdings Ltd | Birmingham | 2025 |
| ASA Holdco Limited | Barnet | 2018 |
| ASA International Group PLC | Worthing | 2018 |
| ASA Investments Fife Ltd | Kirkcaldy | 2026 |
| ASA London Holdings Limited | Leicester | 2015 |
| ASA Market Investments Limited | Finchley | 2017 |
| ASA Mech Group Limited | Dawlish | 2024 |
| ASA Medical Asset Holdings Ltd | London | 2026 |
| ASA Mortgages Ltd | Telford | 2024 |
| ASA Sussex Limited | Barnet | 2021 |
| ASA Worldwide Co. Ltd | London | 2020 |
| Asaad Holdings Limited | Hassocks | 2019 |
| Asac Investments Ltd | Kington | 2013 |
| Asaco Limited | Liverpool | 2025 |
| Asad Consulting Ltd | Bradford | 2019 |
| Asad Nabiha Ltd | Luton | 2025 |
| Asad Naqvi Limited | Derby | 2024 |
| Asadul Investments Ltd | Maldon | 2023 |
| Asae One Limited | London | 2025 |
| Asaf Lending Ltd | Blackburn | 2016 |
| Asaf Niaz Holdings Limited | Liverpool | 2012 |
| Asafeplace Ltd | Belper | 2015 |
| Asahi Glassplant Holdings Ltd | Royston | 2019 |
| Asahi Investment Ltd | Watford | 2024 |
| Asai Capital Ltd | Edgware | 2024 |
| Asai Huntsham Limited | London | 2025 |
| Asalion Capital Limited | London | 2024 |
| Asam EOT Trustees Limited | Linlithgow | 2021 |
| Asam Trustees Limited | Linlithgow | 1985 |
| Asamo Investments Ltd | London | 2025 |
| Asams (Holdings) Limited | Great Yarmouth | 2011 |
| Asams Services Ltd | London | 2024 |
| Asan Holdings Ltd | Walton-On-Thames | 2022 |
| Asan Investment 1 Ltd | Walton-On-Thames | 2026 |
| Asander Group Limited | Bristol | 2026 |
| Asandra | York | 2022 |
| Asangha Ltd | Hounslow | 2023 |
| Asante Capital Limited | London | 2010 |
| Asap (UK) Holdings Limited | Totton | 2024 |
| Asap Cargo Holdings Ltd | Holywood | 2023 |
| Asap Growth Limited | Hayes | 2015 |
| Asap Property Services Ltd | Sunderland | 2024 |
| Asar Wealth Management Limited | Isleworth | 2016 |
| Asara Group Limited | Oxford | 2024 |
| Asarum Finance Holdings Limited | London | 2022 |
| Asarum Finance Limited | London | 2022 |
| Asasca Limited | Buckinghamshire | 2019 |
| Asase YAA Holdings Ltd | London | 2021 |
| Asashi Holdings Ltd | Ilford | 2023 |
| Asassets Inc Limited | Neath | 2026 |