| AB1986 Limited | York | 2023 |
| AB2 Properties Ltd | Knutsford | 2020 |
| AB2000 (Scotland) Ltd | Glasgow | 2012 |
| AB21 Joinery & Building Ltd | Galston | 2021 |
| AB21 Timber Frames Ltd | Galston | 2024 |
| AB29 Renovation Ltd | West Bromwich | 2024 |
| AB2K Limited | London | 2019 |
| AB2M Ltd | Blantyre | 2024 |
| AB37 Property Group Limited | Ashton-Under-Lyne | 2023 |
| AB40 Concept UK Limited | London | 2015 |
| AB7 Ltd | Hounslow | 2026 |
| ABA (Construction) Ltd | Wiltshire | 2000 |
| ABA Architecture and Interiors Limited | Sheffield | 2016 |
| ABA Build Ltd | Bracknell | 2022 |
| ABA Building (South) Ltd | Cardiff | 2019 |
| ABA Building Contractors Ltd | Dartford | 2015 |
| ABA Building Services Ltd | Cardiff | 2026 |
| ABA Electrical and Property Maintenance Ltd | Holmfirth | 2007 |
| ABA Electrical Contracting Limited | Hull | 2017 |
| ABA Flat Roofing Limited | Sheffield | 2020 |
| ABA Gate Solutions Limited | Hurst | 2019 |
| ABA Group Holdings Ltd | London | 2025 |
| ABA Infinity Ltd | Wembley | 2024 |
| ABA Mechanical Limited | Chesterfield | 2016 |
| ABA Projects Ltd | London | 2024 |
| ABA Properties & Design Limited | Bradford | 2004 |
| ABA Renovations Ltd | Milton Keynes | 2018 |
| ABA Roofing (Wigan) Limited | Wigan | 2019 |
| ABA Roofing Contractors Ltd | Sheffield | 2026 |
| ABA Scaffolding Ltd | Epsom | 2022 |
| ABA Services (Midlands) Limited | Walsall | 2003 |
| ABA Swansea Limited | Cardiff | 2016 |
| ABA UP and Over Garage Doors and Gates Ltd | South Gloucestershire | 2026 |
| Abaas Services Ltd | Bracknell | 2024 |
| Abab Property Limited | Grimsby | 2016 |
| Ababio & Sons Limited | Croydon | 2020 |
| Abacairn Limited | Surrey | 2006 |
| Abacass Construction Ltd | Wigston | 2024 |
| Abace Plumbing Services Ltd | Saddleworth | 2025 |
| ABACHA575 Services Limited | London | 2014 |
| Abaco Build Limited | Bristol | 2024 |
| Abaco Marea Ltd | London | 2017 |
| Abacus (Upvc) Ltd. | New Romney | 2003 |
| Abacus AC Solutions Ltd | Brentwood | 2011 |
| Abacus Aluminium Limited | Chelmsford | 2018 |
| Abacus Apartments Ltd | Derby | 2019 |
| Abacus Blinds Suffolk Limited | Ipswich | 2012 |
| Abacus Build & Design Ltd | Liverpool | 2023 |
| Abacus Build (UK) Ltd | Colchester | 2008 |
| Abacus Build Form Limited | Cumbernauld | 2019 |
| Abacus Build Ltd | Colchester | 2004 |
| Abacus Building & Consultancy Services Limited | Dagenham | 2016 |
| Abacus Building & Maintenance Solutions Ltd | Stockport | 2018 |
| Abacus Building & Surveying Limited | Ipswich | 2005 |
| Abacus Building Components Limited | Hull | 2002 |
| Abacus Building Services (Hants) Ltd | Portsmouth | 2011 |
| Abacus Building Services Limited | Stanmore | 2008 |
| Abacus Civils Ltd | Huddersfield | 2025 |
| Abacus Commercial Holdings Ltd | Stratford-Upon-Avon | 2025 |
| Abacus Construction and Renovations Limited | Rochester | 2025 |
| Abacus Construction Limited | Wellington | 2003 |
| Abacus Consulting Engineers Ltd | Wednesbury | 2024 |
| Abacus Contracts (ACL) Limited | Brentwood | 2004 |
| Abacus Developments Bmth Ltd | Poole | 2015 |
| Abacus Developments Limited | Kings Langley | 1972 |
| Abacus Electric Limited | Derby | 2018 |
| Abacus Electrical Herts Limited | Stevenage | 2009 |
| Abacus Electrical Ltd | Rickmansworth | 2016 |
| Abacus Electrical Services Ltd | Luton | 2025 |
| Abacus Energy Solutions Limited | Bootle | 2014 |
| Abacus Engineering Limited | West Coulsdon | 2005 |
| Abacus Facilities Services Ltd | Devizes | 2024 |
| Abacus Fire and Security Ltd | Ipswich | 2005 |
| Abacus Flame Limited | Eastbourne | 2009 |
| Abacus Flooring Solutions Limited | Loughborough | 2020 |
| Abacus Garage Door Solutions Ltd | Sheffield | 2018 |
| Abacus Groundworks Edinburgh Ltd | Penicuik | 2015 |
| Abacus Heating & Plumbing Limited | King'S Lynn | 2018 |
| Abacus High Quality Painters & Decorators Limited | Newcastle | 2000 |
| Abacus Home Automation Limited | Beaconsfield | 2002 |
| Abacus Home Improvements Ltd | Chester | 2024 |
| Abacus Home Wessex Limited | Wimborne | 2019 |
| Abacus Homes 24 Limited | London | 2025 |
| Abacus Homes Construction 24 Limited | London | 2026 |
| Abacus Inc Ltd | London | 2022 |
| Abacus Investments (U.K) Ltd | Ilford | 2016 |
| Abacus Kitchens Ltd | Bury St. Edmunds | 2023 |
| Abacus Micro Limited | London | 2016 |
| Abacus Multimart Private Limited | Manchester | 2024 |
| Abacus Offgrid Ltd | Leamington Spa | 2013 |
| Abacus OIL Experts Limited | Sandy | 2019 |
| Abacus One Limited | Grantham | 2008 |
| Abacus Plastering Preston Limited | Preston | 2019 |
| Abacus Playgrounds Limited | Dartford | 1994 |
| Abacus Plumbing & General Builders Ltd | Whitchurch | 2007 |
| Abacus Plumbing & Heating (Ayrshire) Limited | Ayr | 2006 |
| Abacus Plumbing & Heating (Malmesbury) Ltd. | Malmesbury | 2003 |
| Abacus Plumbing & Heating (Manchester) Ltd | Stockport | 2021 |
| Abacus Projects Limited | Kings Langley | 1979 |
| Abacus Property Construct Ltd | Derby | 2024 |