| Ace Proficiency Ltd | Mildenhall | 2026 |
| Ace Protein Limited | Preston | 2017 |
| Ace Repairs Limited | Kilmarnock | 2007 |
| Ace Roller Shutters Ltd | Mountain Ash | 2025 |
| Ace Rotomould Ltd | Manchester | 2020 |
| Ace Rubber Products Ltd | Harrow | 2012 |
| Ace Sarhene Group Ltd | Bury St. Edmunds | 2023 |
| Ace Sectional Buildings Limited | Ashford | 2001 |
| Ace Sections Limited | Dudley | 2003 |
| Ace Security and Automation Services Limited | Croydon | 2025 |
| Ace Services & Commercial Repairs Limited | Northampton | 2024 |
| Ace Services (IOW) Limited | Ryde | 2015 |
| Ace Shelters Limited | Burscough | 2016 |
| Ace Shopfitters Limited | Harlow | 1984 |
| Ace Shopfront & Shutters Ltd | Hayes | 2016 |
| Ace Shutters & Shopfronts Ltd | Bury | 2023 |
| Ace Signmakers Limited | Croydon | 2009 |
| Ace Signprint Ltd | Newcastle | 2021 |
| Ace Signs Ltd | Braintree | 2024 |
| Ace Slitting Service Ltd | Smethwick | 2019 |
| Ace Spiral Binders Ltd | Birmingham | 2021 |
| Ace Sportswear Limited | Leicester | 1987 |
| Ace Stone Fabrications Limited | Lowestoft | 2025 |
| Ace Supply Company Limited(The) | Sale | 1986 |
| Ace Sweets Limited | Slough | 2018 |
| Ace Systems Limited | Stoke Lodge | 1982 |
| Ace Testing and Repairs Ltd | Normanton | 2023 |
| Ace Threadworks Ltd | Waltham Cross | 2026 |
| Ace Track (U.K.) Limited | Worcester | 1994 |
| Ace Turfcare Ltd | Halstead | 2024 |
| Ace Van Conversions Ltd | Elland | 2026 |
| Ace VUE Ltd | Manchester | 2024 |
| Ace Vulcanising & Lining Solutions Ltd | Kilmarnock | 2018 |
| Ace Welding and Powder Coating Services Limited | West Horndon | 2016 |
| Ace Windows (NE) Limited | Houghton Le Spring | 2013 |
| Ace Woolpacks Ltd. | West Yorkshire | 1991 |
| Ace Worksurfaces Limited | Knottingley | 2025 |
| Ace Workwear Ltd | Torquay | 2022 |
| Ace World Foods Ltd | Buckinghamshire | 2021 |
| Ace Your Health Ltd | London | 2025 |
| Ace- G Investments Limited | London | 2022 |
| Ace-Doughnuts Ltd | Horsham | 2021 |
| ACE1 Ltd | Nantwich | 2020 |
| Aceae Nutra Limited | Ipswich | 2018 |
| Acecrest Limited | Ilford | 2001 |
| Aced Contracting Ltd | Polegate | 2023 |
| Acedag Limited | Staffs | 1981 |
| Acegate (Manufacturing) Ltd | Rochdale | 1996 |
| Acehead Limited | Birmingham | 1974 |
| Acek London Ltd | Bexley | 2025 |
| Aceleir Ltd | London | 2023 |
| Acelet Technologies Ltd | Rossendale | 2025 |
| Acellux Limited | Blackpool | 2026 |
| Acem UK Limited | West Drayton | 2005 |
| Acemar Stone Design Ltd | London | 2025 |
| Acemax Estates Ltd | Liverpool | 1997 |
| Acemor Limited | Saffron Walden | 2004 |
| Acentro Limited | Latimer | 2004 |
| Aceo Distillers Company Ltd | Livingston | 2023 |
| Aceo Limited | Westbury-On-Severn | 1999 |
| Aceon Battery Solar Technology Ltd | Telford | 2010 |
| Acep Limited | London | 2019 |
| Acepak UK Limited | Skelmersdale | 2017 |
| Acepromo Ltd | London | 2025 |
| Acer Aviation Ltd | Aberdeen | 2025 |
| Acer Dairy Solutions Ltd | Castle Cary | 2009 |
| Acer Electrical Systems Limited | Nottingham | 2011 |
| Acer Engineering (Bedford) Limited | Northampton | 2000 |
| Acer Engineering Limited | Preston | 2000 |
| Acer Engineering Services Ltd | London | 2026 |
| Acer Heating & Plumbing Solutions Ltd | Manchester | 2018 |
| Acer Infinity Limited | Preston | 2013 |
| Acerbis UK Limited | Milton Keynes | 2007 |
| Acerleaf Electrical Ltd | London | 2020 |
| Acerod Aircraft Engineering Limited | Porthcawl | 2021 |
| Acersteel Ltd | Reading | 2018 |
| Aces (Adams Computer & Electronic Services) Limited | Colchester | 1996 |
| Aces Dust Control Ltd. | Malvern | 1999 |
| Aces Ecos Limited | Wigan | 2025 |
| Aces Fans Ltd | Northwood | 1969 |
| Aces Records Limited | West Bromwich | 2021 |
| Aces Workwear Ltd | Bromley | 2018 |
| Acesi Ltd | Caterham | 2013 |
| Acesport Limited | London | 2021 |
| Acetarc Limited | Keighley | 1970 |
| Acetarc Welding & Engineering Company Limited | Keighley | 2019 |
| Acetastic Ltd | Coventry | 2014 |
| Acetek Electrical Limited | Surrey | 2001 |
| Acetel (UK) Limited | Coventry | 2018 |
| Acetex Limited | London | 2025 |
| Acetherix Healthcare Ltd | Coventry | 2021 |
| Aceweld Limited | Stoke On Trent | 2002 |
| Acewell Electronics Limited | Burnley | 1983 |
| Acewell Installations Limited | Hapton | 2000 |
| ACF Engineering Ltd | Dunfermline | 2017 |
| Acff Consulting Ltd | Belfast | 2022 |
| Acford Design Services Limited | Coventry | 1992 |
| ACG Airtech Ltd | Cirencester | 2023 |
| ACG Construct Ltd | Cardiff | 2019 |
| ACG Control Systems Ltd | Elland | 2024 |