| Allied CFM Limited | Bucks | 2025 |
| Allied Cleared UK Ltd | London | 2025 |
| Allied Colloids Group Limited | Stockport | 1948 |
| Allied Construction Holdings Limited | Salford | 2005 |
| Allied Consultancy Ltd | Salford | 2019 |
| Allied Consultancy Services Limited | Woodbridge | 2020 |
| Allied Costs Limited | Newport | 2013 |
| Allied Design Consultancy (UK) Limited | Swansea | 2000 |
| Allied Development Group Limited | Kingston Upon Thames | 1970 |
| Allied Distillers Limited | Dumbarton | 1948 |
| Allied Domecq (Holdings) Limited | London | 1961 |
| Allied Domecq First Pension Trust Limited | Rugby | 1978 |
| Allied Domecq Limited | London | 1999 |
| Allied Domecq Medical Expenses Trust Limited | London | 1994 |
| Allied Domecq Spirits & Wine (Overseas) Limited | London | 1980 |
| Allied Domecq Spirits & Wine Holdings Limited | London | 1993 |
| Allied Ecology Ltd | Peterborough | 2022 |
| Allied EMC Limited | Lincoln | 2024 |
| Allied Energy Limited | Norwich | 2016 |
| Allied Engineering Services Ltd | Falkirk | 2023 |
| Allied Facilities (South East) Limited | Slough | 2000 |
| Allied Financial Ltd | Winnersh | 2018 |
| Allied Finlaw UK Ltd | Rugby | 2012 |
| Allied FM Ltd | Friday Bridge | 2024 |
| Allied Freight (UK) Limited | Smethwick | 2003 |
| Allied Geomatics Engineering Limited | Bristol | 2017 |
| Allied Global Marketing Limited | Stockport | 2018 |
| Allied Grain (Scotland) Limited | London | 1925 |
| Allied Grain (South) Limited | London | 1983 |
| Allied Grain (Southern) Limited | London | 1983 |
| Allied Grain Limited | London | 1946 |
| Allied Health and Care Professionals Limited | Glasgow | 2024 |
| Allied Health Solutions Limited | Hadlow | 2011 |
| Allied Healthcare Consultancy Ltd | Princes Risborough | 2022 |
| Allied International Investors Limited | London | 1994 |
| Allied IT Solutions Ltd | Brentwood | 2018 |
| Allied Law Chambers Solicitors Ltd | Ilford | 2016 |
| Allied Law Ltd | Lancing | 2017 |
| Allied Legal Consultants Limited | Altrincham | 2016 |
| Allied Legal Services Limited | Derby | 2017 |
| Allied Leisure Solutions Limited | Borehamwood | 2010 |
| Allied Living History Group CIC | Tonypandy | 2024 |
| Allied Luptons Limited | Maidstone | 2001 |
| Allied Management Services Ltd | Liverpool | 2019 |
| Allied Management Support Ltd | Barking | 2025 |
| Allied Marine Logistics Limited | Tonbridge | 2008 |
| Allied Market Intl Ltd | London | 2019 |
| Allied Marketing Limited | Surrey | 1999 |
| Allied Marketing Services Limited | Cardiff | 2020 |
| Allied Media Limited | London | 2016 |
| Allied Medical Services (UK) Limited | Deeside | 1997 |
| Allied Medicine Ltd | Cambridge | 2023 |
| Allied Merchandise Limited | Nottingham | 2013 |
| Allied Mills (NO.1) Limited | London | 1892 |
| Allied Mutual Insurance Services Limited | London | 1991 |
| Allied Peak Limited | Marlborough | 2020 |
| Allied Perimeter Safety Netting Limited | Westhill | 2014 |
| Allied Pharma Limited | Wolston | 2008 |
| Allied Powers Limited | Wallington | 1993 |
| Allied Products UK Limited | West Bromwich | 2010 |
| Allied Professional Services Ltd | Ilford | 2020 |
| Allied Project Services Ltd. | London | 2011 |
| Allied Project Solutions Ltd | Plymouth | 2021 |
| Allied Purchasing Services Limited | Aberdeen | 1995 |
| Allied Safety Limited | Nottingham | 2016 |
| Allied Secreterial Services Limited | Mitcham | 2007 |
| Allied Solicitors Limited | Manchester | 2017 |
| Allied Solutions Limited | Swansea | 2004 |
| Allied Solwin Limited | London | 2006 |
| Allied Specialists Limited | Gillingham | 2009 |
| Allied Stevedores Limited | Aberdeen | 2003 |
| Allied Strategy Limited | London | 2026 |
| Allied Surveyors & Valuers Ltd | Bristol | 2009 |
| Allied Surveyors Commercial Ltd | Bristol | 2009 |
| Allied Surveyors Diligence Ltd | Bristol | 1999 |
| Allied Surveyors York Limited | Leeds | 2023 |
| Allied Tax and Accountancy Services Ltd | Broadstairs | 2016 |
| Allied Textile Companies Limited | Barnsley | 1904 |
| Allied Traders UK Ltd | Dartford | 2014 |
| Allied UK Consultant Ltd | London | 2013 |
| Allied Universal Consulting Limited | Ferndown | 2015 |
| Allied Vehicles Group Limited | Glasgow | 2020 |
| Allied Ventures London Ltd | London | 2018 |
| Allied West Environmental Consultants Limited | Bristol | 2001 |
| Allied World Industrial Co., Limited | Stafford, | 2011 |
| Allied Zurich Limited | Swindon | 1998 |
| Alliedcore Consultancy Ltd | London | 2026 |
| Alliedcore Limited | Cottingham | 2020 |
| Alliedsure Ltd | Erith | 2015 |
| Allies Computing Trustees Limited | Norwich | 2015 |
| Allies Creative Studio Ltd | Derry | 2025 |
| Alligator Drains UK Limited | Birmingham | 2023 |
| Alligator Research Limited | London | 2014 |
| Alligent Biopharm Consulting (Europe) Limited | Horsham | 2016 |
| Allin Project Services Limited | Shrewsbury | 2025 |
| ALLIN1 Advisory Ltd | London | 2023 |
| ALLIN1.APP Ltd. | Stockton-On-Tees | 2023 |
| Allinagencyuk Limited | Shrewsbury | 2021 |
| Allinall Events Limited | Lichfield | 2013 |
| Allingan Investments Limited | Oldham | 2025 |