| Acco UK Limited | Aylesbury | 1924 |
| Accolade Lifts Ltd | Sittingbourne | 2021 |
| Accolade Print Media Limited | Lincolnshire | 2004 |
| Accolade Workspace Ltd | Stafford | 2017 |
| Accomar Global Ltd | London | 2023 |
| Accomeco Limited | Holmfirth | 2018 |
| Accommodeep Ltd | Cambridge | 2023 |
| Accompany AI Global Limited | Cambridge | 2025 |
| Acconsys Industrial Co., Ltd | Beckenham | 2016 |
| Accora Limited | Orwell | 2003 |
| Accord Engineering Limited | Stevenage | 2003 |
| Accord Healthcare Limited | North Harrow | 2002 |
| Accord-Uk Ltd | Devon | 1903 |
| Accotec Limited | Newton Abbot | 2002 |
| Accountabili-Team Limited | Manchester | 2024 |
| Accoya Color UK Limited | London | 2021 |
| Accra Taps and Valves Ltd | Hitchin | 2022 |
| Accranut Company Limited(The) | Nuneaton | 1982 |
| Accrapak Systems Limited | Warrington | 1976 |
| Accrasystem Limited | Hornchurch | 1987 |
| Accretech-Sbs UK Ltd. | Coventry | 1996 |
| Accrington Grinding Company Limited | Accrington | 2000 |
| Accrington Surgical Instrument Suppliers Limited | Bolton | 2006 |
| Accrite Aluminium Limited | Ellistown | 1991 |
| Accrofab (Alcester) Limited | Alcester | 2018 |
| Accrofab (Derby) Limited | Derby | 2018 |
| Accrofab Advanced Titanium Forming Limited | Welwyn Garden City | 2011 |
| Accsys Products Limited | Reigate | 2019 |
| Accu Range Ltd | London | 2023 |
| Accubio Limited | Alva | 2021 |
| Accucraft UK Ltd | Hereford | 2004 |
| Accudyne Europe Limited | Newport | 2018 |
| Accue Ltd | London | 2023 |
| Accugrind Ltd | Dudley | 2017 |
| Accuheat Limited | Leicester | 2010 |
| Accujet Limited | Poole | 2009 |
| Acculith Ltd | Cheshunt | 2016 |
| Acculith Print Ltd | Cheshunt | 2026 |
| Accuma Plastics Limited | Corby, | 1978 |
| Accumax Limited | Cranleigh | 1993 |
| Accumix Concrete Limited | Droitwich Spa | 2002 |
| Accumore Mobility Limited | Accrington | 2020 |
| Accumulus Resources Ltd | Saltash | 2010 |
| Accuor Group UK Ltd | London | 2020 |
| Accura Engineering Limited | Willenhall | 1979 |
| Accura Engineering Solutions Limited | Cardiff | 2014 |
| Accura Imaging Limited | Milton Keynes | 1992 |
| Accura Moulding Limited | Ashford | 2018 |
| Accuracy International Limited | Southampton | 2005 |
| Accuracy Office Solutions Limited | Bognor Regis | 2012 |
| Accuramatic Limited | Haywards Heath | 2019 |
| Accurascale Ltd | London | 2019 |
| Accurate Armour Limited | Port Glasgow | 1988 |
| Accurate Best Concrete Ltd | Birmingham | 2013 |
| Accurate Boiler Services Ltd | Gloucester | 2025 |
| Accurate Controls Limited | Southampton | 1989 |
| Accurate Fire and Security Systems Limited | Ayr | 2014 |
| Accurate Grinding Limited | Hinckley | 2003 |
| Accurate Industrial Doors Limited | Pontefract | 2011 |
| Accurate Laser Cutting Limited | Tividale | 2005 |
| Accurate Laser Holdings Limited | West Midlands | 2025 |
| Accurate Lifts Limited | Ilford | 2008 |
| Accurate Machining Services Ltd | Oldbury | 2020 |
| Accurate Mechanical Services Limited | Woking | 2017 |
| Accurate Print & Packaging Limited | Leicester | 1994 |
| Accurate Safety Manufacturing Ltd | London | 2021 |
| Accurate Section Benders Limited | Kingswinford | 1990 |
| Accurate Systems Labelling Limited | Darlington | 2010 |
| Accurate Technologies (UK) Limited | Sandy | 2000 |
| Accurate Tool Repair & Supplies Limited | Waterlooville | 2011 |
| Accurate Weight Co. Limited | Liverpool | 1980 |
| Accurate Welding Service Ltd | Walsall | 2026 |
| Accuratio Group Limited | Chorley | 2019 |
| Accurite Holdings Limited | Ulverston | 2014 |
| Accurite Industries Ltd. | Ulverston | 1997 |
| Accurl UK Ltd | Wellingborough | 2018 |
| Accuspan Limited | Finchley | 2023 |
| Accutags Ltd | Derby | 2026 |
| Accutec Limited | Gloucester | 2006 |
| Accutemp Limited | Coventry | 2013 |
| Accutronics Ltd | Newcastle | 2009 |
| Accuturn Limited | Norwich | 2008 |
| Accuwear Limited | Stokesley | 2017 |
| ACD Contract Furnishings Ltd | Birmingham | 2019 |
| ACD GSE Ltd | Bracknell | 2015 |
| Acdc Electricians Ltd | Liverpool | 2012 |
| Acdc Lakes Ltd | Kendal | 2023 |
| Acdc Power Connection Ltd | London | 2023 |
| Acdc Signs Ltd | Armagh | 2014 |
| Acdesignworks Ltd | Hull | 2021 |
| Acdoco Limited | | 2007 |
| Ace & Maya Limited | Bournemouth | 2019 |
| Ace + Spades Limited | Risby | 2014 |
| Ace 4 Kebabs Limited | Wokingham | 1997 |
| Ace Accessories Limited | Whitstable | 2024 |
| Ace Adhesives Limited | Walsall | 1986 |
| Ace Agritec Limited | Dundee | 2017 |
| Ace Air (NI) Ltd | Dromara | 2011 |
| Ace Air Conditioning and Electrical Ltd | Fleet | 2007 |
| Ace Air Conditioning Limited | South Street | 2003 |