| Absolute Refrigeration Limited | Suffolk | 2002 |
| Absolute Roasters Ltd | Bellshill | 2019 |
| Absolute Sanitisers Limited | Wrexham | 2020 |
| Absolute Signage Solutions Ltd | Stockport | 2007 |
| Absolute Signs and Graphics Ltd | Cardiff | 2012 |
| Absolute Signs Ltd | Farnham | 2011 |
| Absolute Speed Ltd | Hove | 2020 |
| Absolute Steel Ltd | Epping | 2018 |
| Absolute Stitches Ltd | Saffron Walden | 2014 |
| Absolute Studio Ltd | Leeds | 2017 |
| Absolute Sustainability Limited | Middlesbrough | 2022 |
| Absolute Taste Limited | Bicester | 1997 |
| Absolute Trade Limited | Palmers Green | 2014 |
| Absolute UK Signs Ltd. | Bishop'S Stortford | 2015 |
| Absolute Van Locks Ltd | Dewsbury | 2024 |
| Absolute Water Group Limited | Southend-On-Sea | 2021 |
| Absolute Water Tech Solutions Limited | Southend-On-Sea | 2021 |
| Absolutefungi Ltd | London | 2025 |
| Absolutely Fabulous Curtains and Blinds Yorkshire Limited | Wakefield | 2021 |
| Absolutely Knot Ltd | Exeter | 2023 |
| Absolutely Stuffed Cookies Limited | Harlow | 2025 |
| Absolvo Ltd | Woking | 2017 |
| Abson Office Furniture Ltd | Darwen | 2023 |
| Abson Office Seating Limited | Manchester | 2012 |
| Absorb Bedding Ltd | Ashton-Under-Lyne | 2023 |
| Absorbent Products Limited | Barnard Castle | 1998 |
| Absorbopak Global Limited | Belfast | 2014 |
| Absorption Systems Limited | Milton Keynes | 2026 |
| Abss Fabrications Ltd | Sheffield | 2015 |
| Abst Ltd | Blackburn | 2022 |
| Abstoneworks Limited | Truro | 2021 |
| Abstract Aromas Ltd | Bury | 2024 |
| Abstract AVR Limited | Blaby Leicester Leicestershire | 1996 |
| Abstract Blinds Ltd | Wolverhampton | 2016 |
| Abstract Cooling Limited | Watford | 2020 |
| Abstract Creative Screenprinters Limited | Bolton | 2003 |
| Abstract Engineering Limited | Lutterworth | 2024 |
| Abstract I.T. Management Limited | Swindon | 2013 |
| Abstract Interior Solutions Ltd | Enfield | 2023 |
| Abstract London Ltd | Richmond | 2020 |
| Abstract PR Limited | London | 2020 |
| Abstract Signs & Graphics Limited | Derbyshire | 1997 |
| Abstrakt Services Limited | Leicester | 1988 |
| Absuelutely Scrumptious Ltd | Birmingham | 2023 |
| ABT Imports and Exports Trading Co Limited | Enfield | 2024 |
| Abtany Ltd | London | 2020 |
| Abtec Building Technologies Ltd | Market Harborough | 2011 |
| Abtec Industries Limited | Spalding | 2002 |
| Abtec Specialist Projects Ltd | Eastleigh | 2011 |
| Abtech Limited | Sheffield | 2006 |
| Abtech Precision Engineering Limited | Farnborough | 2000 |
| Abtech Steel Buildings Limited | Ballygawley | 2015 |
| Abtest Limited | London | 1959 |
| Abti Pharma Limited | Pulford | 2021 |
| Abtr Ltd | Norwich | 2022 |
| Abtus Limited | Haverhill | 2001 |
| ABU Alrub Ltd | London | 2025 |
| ABU Ghassan Ltd | Manchester | 2021 |
| ABU Haashir Perfumes Ltd | Aylesbury | 2025 |
| ABU Mazen Trading Ltd | Manchester | 2021 |
| ABU Perfume Ltd | Greenford | 2025 |
| ABU Thomas Food Ltd | London | 2009 |
| Abundant Earth (Crafts) CIC | Durham | 2025 |
| Abundant Grace Cosmetics Limited | London | 2024 |
| Abundia Biomass-To-Liquids Limited | Redcar | 2020 |
| Abundia Global Impact Group (UK) Ltd | Liverpool | 2023 |
| Aburnet (Hair Containment Solutions) Limited | Ilkeston | 2014 |
| Aburnet Consumer Messaging Solutions Limited | Ilkeston | 2023 |
| Aburnet Limited | Ilkeston | 1924 |
| Abus Crane Systems Limited | Yateley | 1991 |
| Abusami Consultancy Ltd | London | 2019 |
| ABW Barriers & Gates Ltd | Glasgow | 2008 |
| ABW Carpentry Ltd | Haywards Heath | 2022 |
| Abwa Ltd | Hounslow | 2025 |
| Abwelltrade Limited | Nuneaton | 2022 |
| ABY AL Afrin Jahan Ltd | London | 2026 |
| ABY Collection Limited | Bradford | 2024 |
| Abyss Brewing Ltd | Lewes | 2016 |
| Abyss Machinery Limited | Leeds | 2012 |
| Abyssinian Beauty Products Limited | Croydon | 2020 |
| Abyyss Limited | London | 2022 |
| ABZ Consultancy and Training Ltd | Manchester | 2020 |
| ABZ & Co Limited | London | 2017 |
| ABZ Electric Ltd | Harrow | 2024 |
| ABZ Refurbishment Limited | Aberdeen | 2014 |
| ABZ Stars London Ltd | Ilford | 2022 |
| Abzan Renewables Ltd | Oldham | 2024 |
| Abzi Audio Engineering Ltd | Dudley | 2025 |
| Abzs Print & Signs Ltd | Leicester | 2015 |
| Abzu Electronics Ltd | Fareham | 2024 |
| AC & C Aero Ltd | Norwich | 2017 |
| AC &TM Ltd | Jarrow | 2018 |
| AC Aeronautical Limited | Richmond | 2010 |
| AC Auto Services Limited | London | 2015 |
| AC Automation (U.K.) Limited | Carrickfergus | 2000 |
| AC Blast Solutions Ltd | Yeovil | 2023 |
| AC Business Machines Ltd | Corby | 2014 |
| AC Cafes Ltd | Glasgow | 2026 |
| AC Carpentry and Building Limited | Maidstone | 2022 |
| AC Commercials (Malton) Limited | Malton | 1999 |