| Alldaydealsz Ltd | London | 2025 |
| Alldaysales Ltd | Greenock | 2025 |
| Alldelux Limited | London | 2025 |
| Alldirectstore UK Limited | Taffs Well | 2020 |
| Alldis MOT Centre Limited | Stockport | 2016 |
| Alldone Trading Limited | St. Helens | 2013 |
| Alldrew Limited | High Wycombe | 2018 |
| Alldrives & Controls Ltd | Tamworth | 2009 |
| Allduct Equipment Supplies Ltd | Westerham | 2018 |
| Alle Imp&Exp Co., Ltd | Stafford, | 2023 |
| Alle Jewellery Limited | London | 2025 |
| Alleada Associate Ltd | Bishop'S Stortford | 2025 |
| Allease Limited | London | 2020 |
| Alleco Group Ltd | London | 2023 |
| Alleco Limited | London | 2020 |
| Alleenas Ltd | Bradford | 2022 |
| Alleeuro Ltd | Cardiff | 2018 |
| Allegaint Services Ltd | Walton-On-Thames | 2019 |
| Allegiance Management Group Ltd | London | 2017 |
| Allegiance Solutions Limited | Huddersfield | 2024 |
| Allegiant Paints Limited | Ellesmere Port | 2025 |
| Alleglobal Ltd | Hatfield | 2025 |
| Allegory Digital Limited | London | 2023 |
| Allegro Blinds Ltd | Harrow | 2002 |
| Allegro Commerce Co., Ltd | Kington | 2025 |
| Allegro Digital Ltd | London | 2022 |
| Allegro Microsystems Europe Limited | London | 1990 |
| Allegro Music Limited | Braintree | 1989 |
| Allegro Star Ltd | Morden | 2025 |
| Alleina Ltd | Middlesbrough | 2024 |
| Allelectrics Limited | Oxford | 1987 |
| Allelo Studios Ltd | London | 2024 |
| Allely (Rochdale) Ltd | Rochdale | 2020 |
| Allelys General Haulage Limited | Studley | 1991 |
| Allemo UK Ltd | Gorleston | 2012 |
| Allen & Alvan (UK) Ltd | London | 2020 |
| Allen & Barnfield Chemists Limited | Sheffield | 1987 |
| Allen & Co Group Ltd | London | 2025 |
| Allen & Couser (Motors) Limited | Hertfordshire | 1971 |
| Allen & Forey Cars Ltd | Chalfont St Giles | 2017 |
| Allen & Hall Holdings Limited | Benfleet | 1996 |
| Allen & Hall ME Ltd | Benfleet | 2019 |
| Allen & Hall Motor Engineers Limited | Romford | 2004 |
| Allen & Smith Metal Recycling Ltd | Rhyl | 2025 |
| Allen 95 Limited | Hebburn | 2016 |
| Allen Allcare Limited | Cardiff | 2024 |
| Allen American Classics Limited | Foston | 2025 |
| Allen and Kavanagh Automotive Services Ltd | Bicester | 2026 |
| Allen and SON Vehicle Repairs Ltd | Waterlooville | 2023 |
| Allen Automotive Group Ltd | Bromborough | 2024 |
| Allen Automotive Limited | Walsall | 2021 |
| Allen Briggs (Motors) Limited | | 1963 |
| Allen Briggs Hyundai Limited | London | 2023 |
| Allen Bros. (Electrical Factors) Limited | Essex | 1972 |
| Allen Carpets Limited | Gravesend | 2003 |
| Allen Commerce Group Limited | London | 2025 |
| Allen Dawson Ltd | Chichester | 2018 |
| Allen Engineering Solutions Limited | Wallasey | 2011 |
| Allen Engineering (Ferndown) Ltd | Broadstone | 2019 |
| Allen Ensed Group Limited | Oldham | 2022 |
| Allen Exports Limited | London | 2025 |
| Allen Ford (UK) Limited | Warwick | 2003 |
| Allen Francis Ltd | Knaresborough | 2020 |
| Allen Glenold Limited | Leicester | 1983 |
| Allen Guthrie Enterprises Ltd | Coleford | 2023 |
| Allen Harrison Co Ltd | Hull | 2021 |
| Allen Key Group Ltd | London | 2025 |
| Allen Lyman Office Equipment Limited | Northolt | 1976 |
| Allen Meat Company Ltd | London | 2025 |
| Allen Motor Company Limited | Blackburn | 2016 |
| Allen Nick Limited | Telford | 2011 |
| Allen Organ Studios Limited | Hughenden Valley High Wycombe | 1969 |
| Allen Phillips Limited | St Neots | 1997 |
| Allen PMW Ltd | Pershore | 2020 |
| Allen Process Limited | London | 2023 |
| Allen Transport Management Ltd | Wolverhampton | 2022 |
| Allen Valley Aromatics Limited | Gateshead | 2025 |
| Allen Valley Slates Limited | Bodmin | 2002 |
| Allen Valley the Fire Place Ltd | Bodmin | 2012 |
| Allen's 1956 Limited | Nelson | 2003 |
| Allen's Autocare Limited | Ashby-De-La-Zouch | 2009 |
| Allen's Beauty Online Limited | Bedworth | 2014 |
| Allen's Butchers Limited | Harleston | 2012 |
| Allen's Cookies and Cream Ltd | Coventry | 2025 |
| Allen's E-Bikes Ltd | Leighton Buzzard | 2020 |
| Allen's Fishing Tackle Limited | Birmingham | 1999 |
| Allen's Hardware Limited | Newquay | 2005 |
| Allen's Medal Mounting Ltd | London | 2026 |
| Allen's Motor Repairs Limited | Helston | 2021 |
| Allen's Newsagents Limited | Wakefield | 2020 |
| Allen's of Tadley Limited | Newbury | 2011 |
| Allen-Donaldson Ltd | Mauchline | 2024 |
| Allenb Limited | Slough | 2025 |
| Allenby and Scott Ltd | Colwyn Bay | 2024 |
| Allenby Chemists Ltd | | 1997 |
| Allenby Heating & Plumbing Limited | Southall | 2008 |
| Allenby Motorcycles Ltd | Leigh-On-Sea | 2003 |
| Allenby Road Garage Limited | Lancashire | 2007 |
| Allenby Stevenson Limited | North East Lincolnshire | 1973 |
| Allenby Vehicle Sales Ltd | Lincoln | 2018 |