| Advanced Lettings Limited | Redditch | 2023 |
| Advanced Manufacturing Holdings Limited | Rotherham | 2021 |
| Advanced Marine Group Ltd | Maidenhead | 2020 |
| Advanced Marketing (Europe) Limited | Ipswich | 1997 |
| Advanced Markets (UK) Limited | London | 2017 |
| Advanced Mortgage Lending Ltd | Fareham | 2004 |
| Advanced Mortgage Planning Ltd. | Stockport | 2025 |
| Advanced Mortgage Services Limited | Dorset | 2003 |
| Advanced Mortgage Solutions Derbyshire Ltd | Alfreton | 2016 |
| Advanced Mortgage Solutions Leicester Ltd | Leicester | 2014 |
| Advanced Mortgage Solutions Limited | Huntingdon | 2006 |
| Advanced Mortgage Solutions North East Limited | Darlington | 2021 |
| Advanced Mortgages Ltd | Peterborough | 2019 |
| Advanced Nationwide Holdings Limited | Birmingham | 2024 |
| Advanced Netting Holdings Ltd | Clacton-On-Sea | 2026 |
| Advanced Plastics Group (EOT) Limited | Hull | 2025 |
| Advanced Polymers Holdings Ltd | Dudley | 2025 |
| Advanced Precision Holdings Ltd | Bromsgrove | 2019 |
| Advanced Remediation Limited | Leighton Buzzard | 2021 |
| Advanced Rent Limited | Norwich | 2011 |
| Advanced Research Clusters GP Limited | Didcot | 2001 |
| Advanced Research Clusters Holdco Limited | Didcot | 2017 |
| Advanced Ruminant Holdings Limited | Lancaster | 2018 |
| Advanced Seals and Gaskets Holdings Limited | Dudley | 2008 |
| Advanced Solar Materials (Europe) Ltd | London | 2024 |
| Advanced Support Capital Limited | London | 2023 |
| Advanced System Capital Holding Ltd | London | 2023 |
| Advanced Systems Understanding Trustee Limited | Chippenham | 2022 |
| Advanced Technology Assurance Limited | London | 2023 |
| Advanced Technology Manufacturing Limited | Batley | 2015 |
| Advanced Therapeutic Products Ltd | Leamington Spa | 2025 |
| Advanced Titanium Forming Investments Limited | Derby | 2023 |
| Advanced Tooling Systems (Group) Ltd | Maidstone | 2018 |
| Advanced Utility Asset Networks Limited | Braintree | 2023 |
| Advanced Utility Networks Limited | Braintree | 2022 |
| Advanced Vehicle Leasing (Stockton) Limited | Middlesbrough | 2004 |
| Advanced Vehicle Leasing Limited | Middlesbrough | 1997 |
| Advanced Verification Monitoring Holdings Limited | Newcastle Upon Tyne | 2026 |
| Advanced Wealth Management Limited | Sunderland | 2026 |
| ADVANCEFIRE24 Ltd | Cardiff | 2020 |
| Advancemore Healthcare Ltd | Pinner | 2025 |
| Advancetex International Holdings Ltd | London | 2003 |
| Advancing Eyecare (UK) Limited | Birmingham | 2025 |
| Advancing Group Limited | London | 2023 |
| Advancing Holdings Limited | Birmingham | 2015 |
| Advancing Mindset Ltd | Coventry | 2023 |
| Advanco Holdings Limited | London | 2020 |
| Advanta Business Services Holdings Ltd | Eastbourne | 2022 |
| Advanta Direct Ltd | Glasgow | 2001 |
| Advanta Holdings Limited | London | 2004 |
| Advanta Invest Ltd | London | 2020 |
| Advanta Loss Adjusters Limited | London | 2003 |
| Advanta Quantity Surveying Limited | London | 2005 |
| Advanta Risk Ltd | Glasgow | 2000 |
| Advanta Solutions Ltd. | London | 2017 |
| Advanta UK Property Loss Adjusters Limited | London | 2019 |
| Advanta Wealth (South West) Holdings Ltd | Exeter | 2019 |
| Advanta Wealth (South West) Ltd | Devon | 2001 |
| Advanta Wealth Ltd | Glasgow | 2012 |
| Advantage Ahci Ltd | St. Helens | 2018 |
| Advantage Capital Ltd | Borehamwood | 2023 |
| Advantage Creative C.I.C. | Solihull | 2003 |
| Advantage DCP Ltd | London | 2014 |
| Advantage Early Growth Limited | Tenbury Wells | 2003 |
| Advantage Finance & Leasing Limited | Brierley Hill | 1997 |
| Advantage Finance Limited | Solihull | 1999 |
| Advantage Financial Services Limited | London | 1997 |
| Advantage Financial Solutions Ltd | Bristol | 2019 |
| Advantage Global Trade Solutions Limited | Warwick | 2011 |
| Advantage Group Ltd | Ramsgate | 2024 |
| Advantage Growth Fund (General Partner) Limited | Manchester | 2002 |
| Advantage Holding Company Ltd | Cardiff | 2014 |
| Advantage Holdings (Midlands) Limited | Cannock | 2025 |
| Advantage Home Finance Ltd | Edinburgh | 2015 |
| Advantage Insurance Centres Limited | Bury | 1995 |
| Advantage Insurance Services Limited | Bexhill On Sea | 2003 |
| Advantage Merchant Capital Ltd | London | 2013 |
| Advantage Mortgage Services (Yorkshire) Limited | Leeds | 2004 |
| Advantage Odyssey Limited | Uxbridge | 2025 |
| Advantage Risk Solutions Limited | Alton | 2014 |
| Advantage Wealth Management Group Ltd | Glasgow | 2024 |
| Advantage Wealth Management Ltd | Glasgow | 2013 |
| Advantia Card Ltd | Manchester | 2021 |
| Advantis Credit Limited | London | 2004 |
| Advantiv Holdings Limited | Newbury | 2025 |
| Advantos DJM Limited | Bedford | 2022 |
| Advantos Hvac Group Limited | London | 2021 |
| Advantos IJC Limited | Bedford | 2021 |
| Advantos JDS Limited | Bedford | 2022 |
| Advantos UFM Limited | Bedford | 2023 |
| Advena Malta (Holdings) Limited | Leamington Spa | 2021 |
| Advena UK (Holdings) Limited | Leamington Spa | 2021 |
| Advent Associates Limited | London | 2004 |
| Advent Broker Services Ltd | Cheltenham | 2022 |
| Advent Capital (NO. 3) Limited | Brighton | 2005 |
| Advent Capital (NO.2) Limited | Brighton | 2002 |
| Advent Capital Limited | Brighton | 1993 |
| Advent Claims Limited | Chelmsford | 2016 |
| Advent Corporate Finance Limited | Halifax | 2004 |
| Advent Development Holdings Ltd | Middlesbrough | 2012 |