| ASN (North Yorkshire) Limited | Tadcaster | 2025 |
| ASN Holdco Ltd | Leeds | 2026 |
| ASN Holdings Group Ltd | Kingswinford | 2025 |
| ASN Mortgage Solutions Ltd | Coventry | 2020 |
| ASN1 Limited | Exeter | 2022 |
| Asnk Holdings Ltd | Alton | 2025 |
| Asnpss Limited | Alton | 2021 |
| ASO Holdings Limited | Birmingham | 2018 |
| Asoc Holding Limited | Sheffield | 2024 |
| Asone Management Limited | Bristol | 2024 |
| Asoph Limited | St Albans | 2026 |
| Asos Intermediate Holdings Limited | London | 2013 |
| Asos Payments Holding Limited | London | 2021 |
| Asos Payments UK Limited | London | 2021 |
| Asos Ventures Limited | London | 2014 |
| Asot Group Ltd | London | 2021 |
| Asotal Incorporations Limited | London | 2024 |
| Asotra Holding Limited | London | 2024 |
| Asoz Holding Limited | Manchester | 2025 |
| ASP Capital Ltd | Romford | 2023 |
| ASP CPM UK Holdco Limited | London | 2021 |
| ASP Futures Limited | Knutsford | 2021 |
| ASP Group Ventures Ltd | Leyland | 2026 |
| ASP Holdings Limited | St. Helens | 2017 |
| ASP PC II UK Facilitation Ltd | London | 2023 |
| ASP PC III UK Facilitation Ltd | London | 2023 |
| ASP PC III UK GS LEV Facilitation Ltd | London | 2024 |
| ASP PIF UK Facilitation Ltd | London | 2023 |
| ASP PIF UK II Facilitation Ltd | London | 2024 |
| ASP Rivera US PC UK Facilitation Ltd | London | 2023 |
| ASP SPC II UK Facilitation Ltd | London | 2023 |
| ASP SPC Ii-A UK Facilitation Ltd | London | 2023 |
| ASP SPC Iii-A UK Facilitation Ltd | London | 2023 |
| ASP SPC Iii-A UK II Facilitation Ltd | London | 2024 |
| ASP SPC Iii-B UK Facilitation Ltd | London | 2023 |
| ASP SPC Iii-C UK Facilitation Ltd | London | 2023 |
| ASP UK Intermediate CFC1 Limited | London | 2021 |
| ASP UK Intermediate CFC2 Limited | London | 2021 |
| Aspall Holdings Limited | Suffolk | 2015 |
| Aspalls Investment Holdings Limited | Harrogate | 2019 |
| Aspanall Limited | Salford | 2023 |
| Aspara Limited | Tiverton | 2016 |
| Aspc Holdings Limited | Sudbury | 2019 |
| Aspect Arboriculture Holdings Limited | Oxfordshire | 2023 |
| Aspect Capital Limited | London | 1998 |
| Aspect Carpet Holdings Limited | Dunstable | 2016 |
| Aspect Critical Holdings Ltd | Biggleswade | 2023 |
| Aspect Financial Solutions Ltd | Wilmslow | 2007 |
| Aspect Healthcare Holdco Limited | London | 2023 |
| Aspect Holding Ltd | Birmingham | 2019 |
| Aspect Insurance Management Ltd | Portishead | 2018 |
| Aspect Labs Ltd | London | 2023 |
| Aspect Landscape Planning Holdings Ltd | Banbury | 2025 |
| Aspect Lifetime Services Ltd | Chorley | 2014 |
| Aspect Management Group Limited | Oldham | 2023 |
| Aspect Mortgages Limited | Chorley | 2004 |
| Aspect Property Management Holdings Ltd | Cambridge | 2016 |
| Aspect Surveys Limited | Irvine | 2009 |
| Aspect Windows (Holdings) Limited | Exeter | 2000 |
| Aspects Beauty Group Limited | Eastbourne | 2019 |
| Aspects Financial Ltd | Holywood | 2008 |
| Aspects Investments Ltd | Harlow | 2019 |
| Aspeling Ltd | Poole | 2026 |
| Aspell Investments Ltd | Mansfield | 2018 |
| Aspen (CW) Holdco Limited | London | 2025 |
| Aspen (SUA) Limited | Stratford-Upon-Avon | 2018 |
| Aspen (UK) Holdings Limited | | 2003 |
| Aspen 183 Holdings Ltd | Newcastle Upon Tyne | 2024 |
| Aspen Advisers Limited | London | 2022 |
| Aspen Agency Limited | London | 2021 |
| Aspen Assets Limited | Newark | 2007 |
| Aspen Associates Limited | Leatherhead | 2012 |
| Aspen Borrower Ltd | London | 2024 |
| Aspen Bridging Limited | Solihull | 2016 |
| Aspen Build Group (E.A.) Limited | Ipswich | 2021 |
| Aspen Build Holdings (E.A.) Limited | Ipswich | 2020 |
| Aspen Capital Group Limited | Windsor | 2000 |
| Aspen Capital Partners (Europe) Ltd. | Sutton | 1997 |
| Aspen Commercial Finance Ltd | Bedford | 2022 |
| Aspen Consultancy Limited | Northampton | 2000 |
| Aspen European Holdings Limited | London | 2014 |
| Aspen EVO Holdings Limited | Nottingham | 2022 |
| Aspen Financial (Cowes) Limited | Newport | 2017 |
| Aspen Financial Advice Ltd | Thame | 2014 |
| Aspen Financial Services Limited | Kingston Upon Thames | 2006 |
| Aspen Financial Strategies Holding Company Limited | Bessacarr | 2025 |
| Aspen Financial Strategies Limited | Doncaster | 1998 |
| Aspen Florence Limited | London | 2023 |
| Aspen Global Investments Ltd | London | 2019 |
| Aspen Healthcare Developments Limited | Belfast | 2026 |
| Aspen Hill Holdings Limited | Coventry | 2025 |
| Aspen Holdco Ltd | London | 2024 |
| Aspen Holdings & Investments Ltd | Belfast | 2025 |
| Aspen Holdings (Swindon) Ltd | Swindon | 2021 |
| Aspen Insurance UK Limited | | 1974 |
| Aspen Lodge Edgware Limited | London | 2016 |
| Aspen Maintenance Holdings Limited | Taunton | 2026 |
| Aspen Managing Agency Limited | London | 2007 |
| Aspen Midco Ltd | London | 2024 |
| Aspen North Financial Strategies Holding Company Limited | Bessacarr | 2026 |