| Allison’S Bakery Ltd | Manchester | 2023 |
| Allisport Ltd | Ledbury | 2001 |
| Alliver Limited | London | 2017 |
| Allix Ltd | Barnstaple | 2026 |
| Allkin Group Limited | Tunbridge Wells | 2022 |
| Allkraft-Build Ltd | Birmingham | 2024 |
| Allmac (NW) Ltd | Warrington | 2019 |
| Allmand - Smith Limited | Congleton | 1969 |
| Allmark (NI) Limited | Newry | 2003 |
| Allmec Engineering Limited | Warrington | 1998 |
| Allmech 24/7 Services Ltd | Bellshill | 2026 |
| Allmed Healthcare Co., Limited | West Midlands, England | 2023 |
| Allmed Medical Care Holdings Limited | London | 2012 |
| Allmed Medical Logistics Limited | London | 2012 |
| Allmek Services Limited | Long Eaton | 2017 |
| Allmet Duct Services Limited | Portsmouth | 2000 |
| Allmet Fabrications Limited | Fenton, Stoke On Trent | 1999 |
| Allmo Beds Ltd | Glasgow | 2025 |
| Allneedsnationwide Limited | Colchester | 2016 |
| Allnex Resins UK Limited | London | 2004 |
| Allnote Printing Ltd | London | 2020 |
| Allo Technology Limited | Leeds | 2025 |
| Alloa Blinds Limited | Bridge Of Allan | 2026 |
| Alloa Community Enterprises Limited | Alloa | 1985 |
| Alloes Pharmaceuticals UK Ltd | Leicester | 2026 |
| Allofts Ltd | Towcester | 2024 |
| Alloide Ltd | Clacton-On-Sea | 1996 |
| Allom Architectural Lighting Ltd | Northampton | 2016 |
| Allon Company Limited | Dagenham | 2012 |
| Allora Group Limited | Peterborough | 2022 |
| Allos Holdings Limited | Ascot | 2016 |
| Allotrope Scientific Ltd | Durham | 2021 |
| Allott's Gates Limited | Barnsley | 2023 |
| Alloutplay Limited | Glocestershire | 2002 |
| Alloway UK Limited | North Lanarkshire | 2005 |
| Allowell Limited | London | 2024 |
| Alloy Bodies Limited | Manchester | 2005 |
| Alloy DR Ltd | Sheffield | 2025 |
| Alloy Express Ltd | Basildon | 2025 |
| Alloy Fabweld Limited | Chelmsford | 1996 |
| Alloy Herefordshire CIC | Hereford | 2025 |
| Alloy Masters Limited | Welshpool | 1995 |
| Alloy Performance Ltd | Loughton | 2025 |
| Alloy Ramps Limited | Telford | 2021 |
| Alloy Technologies (UK) Limited | London | 1994 |
| Alloy Wheel Repair Southampton Ltd | Southampton | 2018 |
| Alloy Wire International Limited | Brierley Hill | 1999 |
| Alloygator Limited | Redditch | 2007 |
| Alloyguys Limited | Cardiff | 2025 |
| Alloyman Limited | Warrington | 2015 |
| Alloymaster (Scotland) Ltd | Dalkeith | 2016 |
| Allpack Packaging Supplies Limited | Coventry | 1989 |
| Allpest Control Limited | Bristol | 1980 |
| Allphase Projects Ltd | Saltash | 2026 |
| Allplay Kinetics Ltd | Blackpool | 2022 |
| Allport & Vincent Dental Laboratory Ltd | London | 2005 |
| Allprepped.Uk Ltd | London | 2017 |
| Allpress Espresso UK Limited | London | 2010 |
| Allpress Plumbing & Heating Ltd | Colchester | 2012 |
| Allpressed UP Limited | London | 2025 |
| Allprint Design & Print Limited | | 2005 |
| Allprint Display Ltd | Wellingborough | 2004 |
| Allprint Services Ltd | Batley | 2020 |
| Allprint Supplies Limited | Slough | 1999 |
| Allpromo Limited | Beckenham | 2026 |
| Allpumps Limited | Sheffield | 1986 |
| Allround Catering Services Limited | Shenfield | 1997 |
| Allround Fabrications Limited | Aintree | 2005 |
| Allroundsolutions Bristol Limited | Bristol | 2026 |
| Allsaints Distillery Ltd | Beccles | 2019 |
| Allsaints Ltd | Chorley | 2005 |
| Allscope Holdings Limited | Nelson | 2018 |
| Allscope Projects Limited | Nelson | 2005 |
| Allsecured Garage & Industrial Doors Limited | Birmingham | 2008 |
| Allserve Commercial Engineering Ltd | Coventry | 2025 |
| Allset Luggage Ltd | Swindon | 2025 |
| Allsewpretty Ltd | Wickford | 2016 |
| Allshapes Cushions Limited | Aylesbury | 1999 |
| Allsheds Limited | Ely | 2007 |
| Allsignage Ltd | Skipton | 2007 |
| Allsigns International Limited | Harworth, Doncaster | 1999 |
| Allskirt Ltd | Stourbridge | 2013 |
| Allsky Optics Ltd | Harrogate | 2018 |
| Allso-Print Limited | Alresford | 2006 |
| Allson Ltd | Swansea | 2025 |
| Allson Sparkle Limited | Glenrothes | 1984 |
| Allsop and SON Ltd | Alfreton | 2014 |
| Allsop Engineering (Tipton) Limited | London | 1960 |
| Allsop Holdings Limited | Huddersfield | 2004 |
| Allsopp Helikites Limited | Fordingbridge | 1997 |
| Allsops C.T.F. Ltd. | Worthing | 1989 |
| Allsops of Bolton Ltd | Bolton | 2010 |
| Allsorts Design & Print Limited | Westerham | 2006 |
| Allsorts Joinery Limited | Peterhead | 2024 |
| Allspace Furnishings Ltd | Leeds | 2024 |
| Allspars (Holdings) Limited | Plymouth | 2013 |
| Allspeed Signs & Graphics Limited | Fareham | 1994 |
| Allspeed UK Limited | Bury St. Edmunds | 1999 |
| Allspeeds Limited | Blackburn | 2003 |
| Allspice Kitchen Limited | Bude | 2025 |