| Advanced Nutrition Limited | Forest Row | 1988 |
| Advanced Nutrition Systems Limited | London | 2026 |
| Advanced Oral Healthcare Solutions Limited | Carterton | 2018 |
| Advanced Packaging Limited | Stoke-On-Trent | 1999 |
| Advanced Paint Refurbishment Ltd | Droylsden | 2020 |
| Advanced PAT Services Ltd | Birmingham | 2022 |
| Advanced Performance Coatings Limited | Newport | 2014 |
| Advanced Perimeter Systems Limited | Stirling | 1996 |
| Advanced Pipeline Rehabilitation Technologies Ltd. | Bolton | 2002 |
| Advanced Plastic Technology Limited | Milton Keynes | 1991 |
| Advanced Plastics (NW) Limited | Fareham | 2013 |
| Advanced Plastics (South) Limited | Fareham | 1987 |
| Advanced Plastics Limited | Hull | 1992 |
| Advanced Polymer Coatings Limited | Crumlin | 2020 |
| Advanced Polymers Limited | Worthing | 1974 |
| Advanced Polytech Group Limited | Bredbury | 2017 |
| Advanced Polyurethanes Ltd | Swinton | 2013 |
| Advanced Postformed Systems Limited | Stone | 2010 |
| Advanced Pre-Fab Solutions Ltd | Dudley | 2019 |
| Advanced Precision CNC Limited | Bromsgrove | 2013 |
| Advanced Precision Engineering Ltd | Liverpool | 1973 |
| Advanced Print Limited | Coulsdon | 2000 |
| Advanced Print Solutions Ltd | Preston | 2010 |
| Advanced Printing Services (UK) Limited | Swindon | 2000 |
| Advanced Professional Plumbing and Heating Services Limited | Rainham | 2008 |
| Advanced Property Construction Limited | Brighton | 2002 |
| Advanced Protective Packaging Ltd | Manchester | 1986 |
| Advanced Protein Technology Limited | Esher | 2022 |
| Advanced Proteins Unltd | Co Armagh | 1990 |
| Advanced Recovery Systems Ltd | Eye | 2018 |
| Advanced Recycling Systems Limited | Camborne | 2003 |
| Advanced Refinish Solutions Limited | Luton | 2025 |
| Advanced Refrigeration Ltd. | Ellon | 2008 |
| Advanced Repair Services Ltd | Bradford | 2019 |
| Advanced Research and Combat Technologies Limited | London | 2025 |
| Advanced Retention Therapeutics & Research Ltd | Greenhithe | 2017 |
| Advanced Retractable Cables Limited | Rochester | 2004 |
| Advanced Rigging and Hydraulics Limited | Hamble | 2020 |
| Advanced Robotics Limited | Milton Keynes | 2003 |
| Advanced Rocket Technologies Ltd | Bromley | 2022 |
| Advanced Roller Doors (E.K.) Limited | Glasgow | 1997 |
| Advanced Science and Engineering Limited | London | 2018 |
| Advanced Science Nutrition Limited | London | 2023 |
| Advanced Screen Technology Limited | Milton Keynes | 2002 |
| Advanced Seals and Gaskets Limited | Dudley | 1996 |
| Advanced Seating (NW) Limited | Stockport | 2022 |
| Advanced Seating (UK) Limited | Leeds | 2011 |
| Advanced Seating Technology Limited | Crowborough | 2003 |
| Advanced Security Supplies Limited | Stoke On Trent | 2018 |
| Advanced Sensors and AI Ltd | Chesham | 2025 |
| Advanced Sensors Limited | Carrickfergus | 2005 |
| Advanced Service Engineering Ltd | Clevedon | 2026 |
| Advanced Sheet Metal Engineering Limited | High Wycombe | 2007 |
| Advanced Shopfront & Shutters Ltd | West Drayton | 2014 |
| Advanced Signs Ltd. | Glasgow | 2015 |
| Advanced Solar Materials Ltd | London | 2024 |
| Advanced Solutions Hub Ltd | Glenrothes | 2025 |
| Advanced Solutions Limited | Uxbridge | 1989 |
| Advanced Solutions UPS Limited | Stockport | 2014 |
| Advanced Steam Traction Services Ltd | Lymm | 2014 |
| Advanced Steam Traction Trust | Lymm | 2014 |
| Advanced Steel Detailing Limited | Hull | 2015 |
| Advanced Steel Fabrications Ltd | Burntwood | 2023 |
| Advanced Sterilization Products (UK) Limited | London | 2018 |
| Advanced Structural Monitoring Limited | Winchester | 2007 |
| Advanced Surface Solutions Ltd | Sheffield | 2026 |
| Advanced Surgical Research and Development Limited | London | 2010 |
| Advanced Sustainable Developments Limited | Cardiff | 2016 |
| Advanced Tech Marine Ltd | Menai Bridge | 2022 |
| Advanced Technical Plastic Moulding Ltd | Birmingham | 2011 |
| Advanced Technologies Airship Corporation Limited | Keynsham | 2014 |
| Advanced Technology Assemblies Limited | Batley | 2024 |
| Advanced Technology Cutting Limited | Batley | 2015 |
| Advanced Technology Extrusions Ltd | London | 2026 |
| Advanced Technology Limited | Gravesend | 2002 |
| Advanced Test Equipment Limited | Uckfield | 2022 |
| Advanced Test Solutions Limited | Bradford | 2012 |
| Advanced Textile Solutions Ltd | Nottingham | 2024 |
| Advanced Therapeutic Materials Limited | Leicester | 2003 |
| Advanced Thermosets Limited | King'S Lynn | 1993 |
| Advanced Timber Frame Limited | Bolton | 2008 |
| Advanced Tool and Design Limited | Birmingham | 1969 |
| Advanced Tooling & Components Ltd. | Glasgow | 2010 |
| Advanced Tooling Services Limited | Glasgow | 1996 |
| Advanced Tooling Systems UK Limited | Maidstone | 2002 |
| Advanced Total Fire Protection Ltd | Cardiff | 2022 |
| Advanced UK International Ltd | Worcester Park | 2023 |
| Advanced Vacuum Solutions Limited | Macclesfield | 2022 |
| Advanced Vehicle Alarms Limited | Dartford | 2014 |
| Advanced Vehicle Concepts Limited | Milton Keynes | 2004 |
| Advanced Ventilation Solutions Ltd | Ballyclare | 2018 |
| Advanced Ventilation Systems Ltd | Arundel | 2007 |
| Advanced Virtual Ltd | London | 2018 |
| Advanced Web Technology Ltd | Swansea | 2014 |
| Advanced Windows & Conservatories (Scotland) Ltd | Hamilton | 2015 |
| Advanced Windows (Midlands) Ltd | Tamworth | 2005 |
| Advanced Wires Ltd | Huddersfield | 2018 |
| Advanced Witness Systems Limited | Luton | 1990 |
| Advanced Workshops Ltd | Boldon | 2005 |
| Advanced Xtracts Ltd | Altrincham | 2018 |