| Acorn Insurance Intermediaries Limited | Whitstable | 1999 |
| Acorn Invest Ltd | Crawley | 2025 |
| Acorn Labels Holdings Limited | St. Ives | 2007 |
| Acorn Lane Financial Services Limited | Ealand | 2024 |
| Acorn LE Limited | Derby | 2026 |
| Acorn Mortgage Services (Essex) Limited | Essex | 2006 |
| Acorn Mortgages & Later Life Lending Ltd | Padiham | 2016 |
| Acorn Newco 2 Limited | London | 2024 |
| Acorn Portfolio Investments Limited | London | 2022 |
| Acorn Portfolio Investments NO 1 Limited | London | 2026 |
| Acorn Portfolio Investments NO 2 Limited | London | 2026 |
| Acorn Portfolio Investments NO 3 Limited | London | 2026 |
| Acorn Portfolio Investments NO 4 Limited | London | 2026 |
| Acorn Portfolio NO2 Limited | London | 2023 |
| Acorn Portfolio NO3 Limited | London | 2024 |
| Acorn Premium Finance Limited | Newcastle Upon-Tyne | 2014 |
| Acorn Recyclers (Property) Limited | Loughborough | 2025 |
| Acorn Reserve Ltd | Sheffield | 2021 |
| Acorn Storage Holdings Limited | Rochester | 2023 |
| Acorn to Oak Business Finance Limited | Erith | 2020 |
| Acorn to Oak Holdings Ltd | Maidenhead | 2025 |
| Acorn to Oaks Financial Services EOT Ltd | Willenhall | 2024 |
| Acorn to Oaks Financial Services Ltd | Willenhall | 2008 |
| Acorn Top Co Limited | Tewkesbury | 2025 |
| Acorn Topco Limited | Manchester | 2017 |
| Acorn TP Holdco Limited | Redditch | 2021 |
| Acorn UK Midco 1 Limited | Birmingham | 2024 |
| Acorn UK Midco 2 Limited | Birmingham | 2024 |
| Acorn UK Topco Limited | Birmingham | 2024 |
| Acorn Velindre (Development) Limited | London | 2022 |
| Acorn Velindre (Holding) Limited | London | 2022 |
| Acorn Wealth Management Group Limited | Poringland | 2018 |
| Acorn Wealth Management Limited | Acle | 2017 |
| ACORN4MORTGAGES Limited | Mold | 2001 |
| ACORN4MORTGAGES2 Limited | Mold | 2020 |
| Acornmain Limited | Road Sheffield | 1991 |
| Acorns (Southern) Bidco Limited | Southampton | 2024 |
| Acorns (Southern) Holdings Limited | Southampton | 2024 |
| Acorns Rise Limited | Market Drayton | 2025 |
| Acorns Solutions Limited | Waltham Cross | 2015 |
| Acornstone Limited | Surrey | 1998 |
| Acosta RH Limited | Woking | 2017 |
| Acott Services Limited | Haslemere | 2022 |
| ACP (Group) Limited | Portsmouth | 2012 |
| ACP (NO 4) Limited | Nottingham | 2019 |
| ACP (NO1) Limited | Nottingham | 2017 |
| ACP (NO2) Limited | Nottingham | 2017 |
| ACP Asset Management Limited | London | 2019 |
| ACP BG Ltd | London | 2019 |
| ACP Business Holdings Ltd | Lancing | 2024 |
| ACP Debt Capital Markets Limited | London | 2011 |
| ACP Europe Limited | London | 2005 |
| ACP Fintech a Limited | London | 2019 |
| ACP Holdco Limited | London | 2019 |
| ACP Holdings Ltd | Manchester | 2025 |
| ACP I Shareco Limited | London | 2014 |
| ACP Infinite Limited | London | 2013 |
| ACP Investments Holdings Limited | St. Helens | 2021 |
| ACP Lending 2 Limited | London | 2020 |
| ACP Lending 3 Limited | London | 2022 |
| ACP Management Partners, Ltd | London | 2022 |
| ACP Midco 2 Limited | London | 2025 |
| ACP Midco Limited | London | 2019 |
| ACP Ordinary Shareco Limited | London | 2014 |
| ACP Pharmacy Group Ltd | Rotherham | 2026 |
| ACP Property Group Ltd | Rotherham | 2026 |
| ACP Rexon Limited | London | 2015 |
| ACP Stories 1 Limited | London | 2025 |
| ACP Ventures Limited | Redditch | 2014 |
| ACP Wealth Management Limited | Newcastle Upon Tyne | 2016 |
| ACP Wind Limited | London | 2014 |
| ACP1 Ltd | St. Albans | 2020 |
| Acqsoft Limited | Godalming | 2025 |
| Acqua Holding Limited | Enfield | 2022 |
| Acquablu (UK) Limited | Southend On Sea | 2023 |
| Acquico Holdings Limited | Wallington | 2023 |
| Acquiesce Group Ltd | Bolton | 2026 |
| Acquiesce Holdings Ltd | Bolton | 2022 |
| Acquiescere Holdings Ltd | London | 2023 |
| Acquinex Limited | London | 2017 |
| Acquiom Agency Services Ltd | London | 2024 |
| Acquiom Financial UK Ltd | London | 2023 |
| Acquipeak Group Holdings Limited | Liverpool | 2019 |
| Acquipeak Project Holdings Limited | Liverpool | 2023 |
| Acquipeak Property Holdings Limited | Liverpool | 2019 |
| Acquire Capital Ventures Ltd | Nuneaton | 2023 |
| Acquire Finance Ltd | Yateley | 2018 |
| Acquire Financial Planning Ltd | Holmfirth | 2017 |
| Acquire Media 1 UK Limited | London | 2020 |
| Acquire Mortgages Ltd | Rayleigh | 2018 |
| Acquire Security Ltd | London | 2026 |
| Acquire Your Business Limited | London | 2010 |
| Acquired Asset Finance Ltd | London | 2024 |
| Acquired Limited | Cheshire | 2015 |
| Acquiring Solutions Ltd | Belfast | 1998 |
| Acquis Holdco Limited | Dorking | 2024 |
| Acquis Holding Limited | Newport | 2014 |
| Acquis Insurance Management Limited | Newport | 2009 |
| Acquis Nominee Limited | Newport | 2021 |
| Acquisan Limited | Cambridge | 2024 |