| Allan Accounting Services Ltd | Inverness | 2020 |
| Allan Associates Chtd. Surveyors Limited | Lancaster | 2002 |
| Allan Associates Ltd | London | 2021 |
| Allan Barr Project Services Limited | Altrincham | 2021 |
| Allan Barton International Ltd | West Moors | 2016 |
| Allan Beattie Limited | Uckfield | 2026 |
| Allan Bell Consulting Limited | Henfield | 2005 |
| Allan Biggar & Company Limited | Chippenham | 2012 |
| Allan Biggar Consulting Ltd | Chippenham | 2024 |
| Allan Bloodlines Limited | Ash Vale | 1990 |
| Allan Bridge Engineering Limited | Bingley | 2014 |
| Allan Brown (Accountancy and Taxation Services) Limited | Worcestershire | 2000 |
| Allan Butler Creative Design Ltd | Hamilton | 2008 |
| Allan Caple Design Contracting Ltd | Swindon | 2024 |
| Allan Consultancy Limited | Glasgow | 2009 |
| Allan Corfield Architects Limited | Dunfermline | 2010 |
| Allan Corfield Structures Limited | Dunfermline | 2020 |
| Allan Craig Ltd | Kington | 2023 |
| Allan Curran Architects Limited | Enniskillen | 2004 |
| Allan Engineering Limited | Malton | 1992 |
| Allan Fernie Consulting Ltd | Glasgow | 2026 |
| Allan G. Hill & Partners Limited | Dorking | 2001 |
| Allan Gasson Limited | Lewes | 2016 |
| Allan Goody Associates Ltd | Norwich | 2009 |
| Allan Hartwell Limited | Oldham | 2010 |
| Allan Henderson Building Surveyor Limited | Derby | 2023 |
| Allan James Financial Services Limited | Lichfield | 2012 |
| Allan JAY Paine Limited | London | 2011 |
| Allan Joyce Architects Limited | Nottingham | 2006 |
| Allan Lifting Services Limited | Dundee | 2014 |
| Allan Microscopy Ltd | Royston | 2025 |
| Allan Morrison Accountancy Services Limited | Glasgow | 2009 |
| Allan Murray Architects Limited | Edinburgh | 1998 |
| Allan Murray Design Ltd | Edinburgh | 2014 |
| Allan Offshore Limited | Middlesbrough | 2025 |
| Allan Oliver Limited | Darlington | 2013 |
| Allan Panthera Limited | Edinburgh | 2018 |
| Allan Reece & Co Limited | Hoddesdon | 2001 |
| Allan Robertson Consulting Limited | Linlithgow | 2013 |
| Allan Sinclair Limited | Dunfermline | 2012 |
| Allan Smith Accounting & Tax Limited | Hitchin | 2001 |
| Allan Snow Accountants Ltd | Chertsey | 2021 |
| Allan Whiteford Ltd | County Durham | 2010 |
| Allan Wilson Cinematography Ltd | St Ives | 2014 |
| Allan Wood Inspection Limited | Hull | 2025 |
| Allanacc Ltd | Isle Of Arran | 2025 |
| Allanart Ltd | Bexhill-On-Sea | 2017 |
| Allanconsult Limited | Deddington | 2009 |
| Allanda Limited | Caerphilly | 2006 |
| Allander Aerotech Limited | Glasgow | 2017 |
| Allander Warehouse Company (Sports & Leisure) Limited | Potters Bar | 1989 |
| Allander Warehouse Company Limited | Potters Bar | 2011 |
| Allanglesmedia Ltd | Kilmarnock | 2023 |
| Allanmead Management Company Limited | Bristol | 2001 |
| Allanpark Consultants Limited | Balfron | 2004 |
| Allans the Accountants Ltd | Surbiton | 2007 |
| Allanshaw Accountancy Services Ltd | Hamilton | 2016 |
| Allanshaw Consultancy Limited | Hamilton | 2019 |
| Allanson Business Consultancy Limited | Clitheroe | 2016 |
| Allantia Consulting Limited | Dover | 2025 |
| Allanwater Solutions Limited | Alloa | 2020 |
| Allapitchai Advisory Ltd | London | 2026 |
| Allard Bailey Family Law Ltd | London | 2016 |
| Allard Services UK Ltd | London | 2026 |
| Allardes Projects Ltd | Grangemouth | 2021 |
| Allardice Notary Public Ltd | Salisbury | 2022 |
| Allardichi Ltd | Portlethen | 2019 |
| Allardyce Design Limited | Aberdeen | 2016 |
| Allari Partners Limited | Lutterworth | 2025 |
| Allars Consultancy Limited | Budleigh Salterton | 2010 |
| Allasbrook Limited | Lurgan | 2008 |
| Allassio Clark Finance Limited | Milton Keynes | 2023 |
| Allassio Clark Limited | Milton Keynes | 2014 |
| Allax Design Ltd | Telford | 2026 |
| Allazo Accounting Ltd | Berkhamsted | 2014 |
| Allazo Consulting Services Ltd | Derby | 2017 |
| Allazo Ltd | Berkhamsted | 2012 |
| Allbern Enterprises Limited | Lurgan | 2020 |
| Allberry Engineering and Design Ltd | Surbiton | 2017 |
| Allbest Global Tranese Cooperation Ltd | Beckenham | 2013 |
| Allbio Limited | Ashford | 2014 |
| Allbrooks Consultancy Limited | Bristol | 2008 |
| Allbrus Ltd | London | 2023 |
| Allbutt Consulting Limited | Glasgow | 2014 |
| Allchange Consulting Limited | South Croydon | 2017 |
| Allchin Ltd | Keston | 2026 |
| Allchloerose Ltd | Rugeley | 2020 |
| Allchurch & Co Limited | Swansea | 2016 |
| Allchurch Property Lawyers Limited | Worcester | 2015 |
| Allclear Holdings Limited | Romford | 2001 |
| Allclear Safety and Training Ltd | Cosham | 2016 |
| Allco Signs Ltd | Bolton | 2008 |
| Allcoat Powder Coating Ltd | Stoke On Trent | 2025 |
| Allcommunications Ltd | Henfield | 2024 |
| Allcoms Services Limited | Blackburn | 2019 |
| Allcorn Engineering Limited | Portsmouth | 2009 |
| Allcot IO Ltd | London | 2022 |
| Allcourt Solicitors Limited | Livingston | 2013 |
| Allcow Trading Company Limited | Bourne | 2011 |
| Allcraft Marine Ltd | Lymington | 2016 |