| Asset Portfolio Group Ltd | London | 2025 |
| Asset Protection Group Limited | Warrington | 2015 |
| Asset Recoveries Group Limited | Southampton | 2002 |
| Asset Recovery & Insolvency Ltd | Warsash | 2014 |
| Asset Recovery Network (UK) Limited | Spilsby | 2017 |
| Asset Research Consulting Ltd | London | 2018 |
| Asset UK Holdings Ltd | Middleton | 2026 |
| Asset Wealth Advisory Limited | Ashford | 2023 |
| Asset Wealth Creation Limited | Portsmouth | 2015 |
| Asset Wealth Management Limited | Hertfordshire | 2003 |
| Asset X Ltd | Grantham | 2025 |
| Assetblue Holdings Limited | London | 2003 |
| Assetcore Holdings Ltd | Cardiff | 2025 |
| Assetcure Ltd | London | 2025 |
| Assetedge Limited | Salford | 2021 |
| Assetfinance December (F) Limited | Birmingham | 1969 |
| Assetfinance December (H) Limited | Birmingham | 1989 |
| Assetfinance December (P) Limited | | 1977 |
| Assetfinance December (R) Limited | Birmingham | 2002 |
| Assetfinance June (a) Limited | | 1973 |
| Assetfinance June (D) Limited | Birmingham | 1976 |
| Assetfinance March (B) Limited | | 1969 |
| Assetfinance March (D) Limited | Birmingham | 1980 |
| Assetfinance March (F) Limited | Birmingham | 1980 |
| Assetfinance September (F) Limited | | 1964 |
| Assetfinance September (G) Limited | Birmingham | 1973 |
| Assetiva Holdings Limited | London | 2025 |
| Assetlend Ltd | Newbury Park | 2018 |
| Assetlion Limited | Knutsford | 2026 |
| Assetmax Holdingspro Ltd | Glasgow | 2023 |
| Assetree Group 2 Ltd | Edgware | 2020 |
| Assetrock Finance Ltd | Essex | 2016 |
| Assetrock Holdings Ltd | Essex | 2016 |
| Assetrove Holding Ltd | Harrow | 2025 |
| Assets and Gold Limited | Guildford | 2023 |
| Assets Holds Ltd | Morden | 2025 |
| Assets Loft London Ltd | Stourbridge | 2022 |
| Assets Pact Ltd | Edinburgh | 2020 |
| Assets Speak Ltd | Norwich | 2022 |
| Assets Under Advisory Ltd | London | 2026 |
| Assetsafe Group Ltd | Worcester Park | 2026 |
| Assetseeds Ltd | Cardiff | 2020 |
| Assetstone Bridging Ltd | London | 2023 |
| Assetstone Holdings Ltd | London | 2023 |
| Assetstone Ltd | London | 2021 |
| Assetstone Secured Finance Ltd | London | 2021 |
| Assetsure Finance Limited | London | 2020 |
| Assetsure Limited | London | 2007 |
| Assetswise Ltd | London | 2020 |
| Assettrain Financial Technologies Ltd | London | 2021 |
| Assetus Limited | Manchester | 2025 |
| Assetwise Investments (UK) Limited | London | 2023 |
| Assetz Capital Funding Ltd | Manchester | 2023 |
| Assetz Capital Lending (Alpha) Limited | Manchester | 2021 |
| Assetz Capital Lending (Bravo) Limited | Manchester | 2022 |
| Assetz Capital Lending Limited | London | 2020 |
| Assetz Capital Trust Company Limited | Manchester | 2012 |
| Assetz Provision Funding Limited | Manchester | 2014 |
| Assetz SME Capital Limited | Manchester | 2012 |
| Assicuriamo. CI Ltd | London | 2025 |
| Assigns Holdings Limited | Letchworth | 2015 |
| ASSIMIL8 Holdings Limited | Northampton | 2023 |
| Assimila Group Limited | Reading | 2019 |
| Assisi Capital Limited | Cranbrook | 2008 |
| Assisi Pet Care Group Limited | London | 2020 |
| Assisi Pet Care Midco Limited | London | 2022 |
| Assist Bridging Ltd | Wembley | 2022 |
| Assist Financial Management Limited | Lytham St. Annes | 2006 |
| Assist Group Holdings Limited | Ruislip, | 2023 |
| Assist Group Limited | London | 2023 |
| Assist Holdings Limited | Birmingham | 2025 |
| Assist Insurance Services Limited | Northampton | 2005 |
| Assist Mortgages Ltd | Reading | 2025 |
| Assist Security Group Limited | London | 2019 |
| Assistance & Coaching Comptabilite & Administration Ltd | Dover | 2017 |
| Assisted Lives Holdings Ltd | Bradford | 2018 |
| Assisted Living Project Limited | Thames Ditton | 2023 |
| Assisted Living South West Group Limited | Coventry | 2011 |
| Assisted Reproduction Alliance Limited | London | 2022 |
| Assistive Holdings Limited | London | 2009 |
| Assl Investments Limited | Canterbury | 2025 |
| Asso Denari Ltd | London | 2024 |
| Associate Design Time Holdings Limited | Leeds | 2025 |
| Associated Asphalt Assets Limited | West Drayton | 2024 |
| Associated Aviation Underwriters Limited | London | 2002 |
| Associated Bodyshop Factors Limited | Manchester | 2004 |
| Associated Commercial Finance Limited | Cheltenham | 2004 |
| Associated Credits Limited | Radcliffe Manchester | 1952 |
| Associated Electrical Industries Limited | Birmingham | 1899 |
| Associated Engineering Services Holdings Limited | Northampton | 2012 |
| Associated Financial Planning Ltd | Glasgow | 2015 |
| Associated Foreign Exchange Limited | London | 2003 |
| Associated Group Holdings Limited | Manchester | 2023 |
| Associated Independent Assessors Limited | Weston-Super-Mare | 1984 |
| Associated International Cement Limited | Coalville | 1949 |
| Associated Legal and Financial Limited | Inverness | 2005 |
| Associated Pest Control Holdings Limited | Henlow | 2025 |
| Associated Pipeline Products Holdings Limited | Lisburn | 2025 |
| Associated Premium Funding Limited | Luton | 2003 |
| Associated Print Holdings Limited | London | 2018 |