| Acme Flooring and Paving Limited | Frome | 2012 |
| Acme Futures Limited | London | 2017 |
| Acme Global Limited | London | 2023 |
| Acme Green Molecules One (UK) Private Limited | Addlestone | 2026 |
| Acme Green Molecules Two (UK) Private Limited | Addlestone | 2026 |
| Acme Value Management Limited | Borehamwood | 2016 |
| Acmh One Limited | London | 2024 |
| Acmlh Limited | Birmingham | 2026 |
| Acmr Capital Management Limited | London | 2017 |
| Acmr Holdings Limited | Sidcup | 2021 |
| Acms Holdco Limited | London | 2020 |
| ACN Callaway Ltd | Caterham | 2024 |
| ACN Group Limited | London | 2022 |
| Acnielsen (UK) Pension Plan Trust Limited | Oxford | 1997 |
| ACO Booth Street Limited | London | 2020 |
| ACO Building Services Ltd | Glasgow | 2025 |
| ACO Douglas Ltd | Nelson | 2023 |
| ACO Green 1 Ltd | London | 2021 |
| ACO IX Co-Investment Europe Limited | London | 2025 |
| ACO Renaissance 1 Ltd | London | 2021 |
| Acoc Holdings Ltd | Birmingham | 2025 |
| Acof IX Europe Funding Limited | London | 2024 |
| Acof IX Europe Limited | London | 2024 |
| Acof IX GCF Europe Limited | London | 2024 |
| Acof Viii Europe Funding Limited | London | 2023 |
| Acof Viii Europe Limited | London | 2022 |
| Acof Viii GCF Europe Limited | London | 2023 |
| Acoffer Limited | Stockport | 2023 |
| Acol FI STD Ltd | Chester | 2021 |
| Acolade Ltd | Ilford | 2016 |
| Acolin (UK) Limited | London | 2010 |
| Acolin Group Holdco Limited | London | 2019 |
| Acolin Group Limited | London | 2019 |
| Acolin Group Midco Limited | London | 2019 |
| Acolin Group Topco Limited | London | 2019 |
| Acollaborative Holdings UK Ltd | London | 2024 |
| Acom Holdings Ltd | Sherborne | 2026 |
| Acomarvic Limited | Bristol | 2026 |
| Acomb Construction Holdings Limited | Richmond | 2017 |
| Acomb Engineering Holdings Limited | Beverley | 2026 |
| Acomb Trustees Limited | Leicester | 2000 |
| Acopia Investments Ltd | Littlehampton | 2018 |
| Acorn (Leicester) Ltd | Market Harborough | 2015 |
| Acorn (N.I) Holdings Ltd | Magherafelt | 2022 |
| Acorn 17 (Holding) Limited | Hull | 2023 |
| Acorn 2 Oak Property Holdings Limited | Braintree | 2026 |
| Acorn ACR Holdings Limited | Bury St Edmunds | 2018 |
| Acorn Affordable Housing Limited | London | 2019 |
| Acorn Affordable Management Limited | London | 2021 |
| Acorn Agricultural Finance Limited | Tiverton | 2010 |
| Acorn Aluminium Group Holdings Ltd | Wellingborough | 2005 |
| Acorn Aluminium Holdings Limited | Wellingborough | 2005 |
| Acorn Assessors Limited | York | 1998 |
| Acorn Associates Inc. Limited | Hessle | 2006 |
| Acorn Baby Ltd | London | 2022 |
| Acorn BID Co Limited | Tewkesbury | 2025 |
| Acorn Bidco Limited | Manchester | 2017 |
| Acorn Bioenergy Holdco Limited | London | 2022 |
| Acorn Bowman Finance and Investment Management Ltd | Minster | 2002 |
| Acorn Broker Network Limited | Gloucester | 2025 |
| Acorn Business Consultants & Advisors Ltd | High Wycombe | 2025 |
| Acorn Capital Ltd | Milton Keynes | 2012 |
| Acorn Capital Partners Limited | Gloucester | 1999 |
| Acorn Classics House Limited | Taunton | 1978 |
| Acorn Commercial Finance Ltd | Northampton | 2020 |
| Acorn Commercial Loans Limited | Northampton | 2021 |
| Acorn Consolidated Investments Ltd | London | 2023 |
| Acorn Country Capital Ltd | Sutton Coldfield | 2006 |
| Acorn CR Limited | Derby | 2026 |
| Acorn Developments (NW) Ltd | Liverpool | 2025 |
| Acorn Dynamics Limited | London | 2016 |
| Acorn Family Investments Unlimited | Leeds | 2021 |
| Acorn Finance & Mortgage Limited | London | 2020 |
| Acorn Finance and Business Services Limited | Faringdon | 2022 |
| Acorn Finance Limited | Pershore | 2000 |
| Acorn Financial Consultancy Limited | Gerrards Cross | 1997 |
| Acorn Financial Planning Ltd | Cheltenham | 2013 |
| Acorn Financial Services (South East) Limited | Ramsgate | 2007 |
| Acorn Financial Services Limited | Lincolnshire | 2006 |
| Acorn FM Holdings (UK) Limited | London | 2011 |
| Acorn Global Ventures Ltd | London | 2021 |
| Acorn Green Group Limited | London | 2021 |
| Acorn Green Investments Limited | London | 2021 |
| Acorn Green Investments NO 2 Limited | London | 2021 |
| Acorn Green Investments NO 3 Limited | London | 2026 |
| Acorn Green Investments NO 4 Limited | London | 2026 |
| Acorn Green Investments NO 5 Limited | London | 2026 |
| Acorn Green Investments NO 6 Limited | London | 2026 |
| Acorn Green Securities Limited | London | 2023 |
| Acorn Green Settlements Limited | London | 2021 |
| Acorn Group Holdings Limited | Manchester | 1992 |
| Acorn Group Management Ltd | Wimborne | 2022 |
| Acorn Group Pension Admin Ltd | Cheltenham | 2013 |
| Acorn Heights Property Limited | London Colney | 2025 |
| Acorn Holdco 2 Limited | Liverpool | 2017 |
| Acorn Holdings (London) Limited | London | 2014 |
| Acorn Holdings Bidco Limited | London | 2025 |
| Acorn Holdings Midco Limited | London | 2025 |
| Acorn Industrial Estates Limited | Merseyside | 2002 |
| Acorn Insurance and Financial Services Limited | Liverpool | 1982 |