| AJ Tippers Ltd | Bristol | 2019 |
| AJ Transportation UK Ltd | Manchester | 2018 |
| Aj&Sons Waste Removel Service Ltd | Rayleigh | 2023 |
| Aj's and Sons Plumbing and Heating Solutions Ltd | London | 2020 |
| AJB Recycling Ltd | Rotherham | 2026 |
| AJC Drainage Ltd | Frome | 2002 |
| AJD Water Services Limited | Didcot | 2019 |
| Ajdrainage Ltd | Birmingham | 2019 |
| AJE Services Ltd | Taunton | 2020 |
| Ajewater Limited | Cranbrook | 2025 |
| AJG Waste Solutions Ltd | Newmarket | 2020 |
| AJH Waste Management & Logistics Limited | Kidderminster | 2024 |
| AJK Recycling Solutions Limited | Cambridge | 2012 |
| Ajplus Ltd | Romford | 2023 |
| AJS Building and Developments Ltd | Derby | 2024 |
| AJS Caravan & Home Services Ltd | Saxmundham | 2024 |
| AJS Drainage Services Ltd | Uxbridge | 2026 |
| AJS Environmental Services Ltd | Canvey Island | 2018 |
| Ajsky Azbest Ltd | London | 2018 |
| AJT Environmental Ltd | Bristol | 2024 |
| Aj`S Limited | Chesterfield | 2010 |
| AK Loos Ltd | Aylesbury | 2023 |
| AK Plastic Limited | Shetland | 2024 |
| AK Recycling Ltd | Bradford | 2022 |
| AK Recycling Services Limited | Bradford | 2016 |
| AK Specialist Property Services Ltd | Morecambe | 2026 |
| AK Tyres Ltd | London | 2022 |
| AK Waste Limited | London | 2022 |
| AK Waste Management Ltd | Liverpool | 2025 |
| AK Waste Management Solutions Ltd | Cardiff | 2025 |
| AK Waste Removal Ltd | Shildon | 2025 |
| AKB Contractors Limited | Dorking | 2003 |
| AKG Clearance & Transport Services Ltd | Dartford | 2025 |
| Akhtar Waste & Energy Developments Ltd | Royston | 2013 |
| AKJ Utility Solutions Ltd | Wisbech | 2021 |
| AKM Recycling Limited | Pontefract | 2016 |
| AKS Removals Ltd | London | 2026 |
| AKS Skip Hire Services Limited | Norwich | 2009 |
| Akvosphere UK Ltd | Purley | 2023 |
| Akwa Solutions Limited | Stockport | 2007 |
| AL Signature Drainage Ltd | Poole | 2025 |
| AL Skips Ltd | Hornchurch | 2026 |
| AL-2 Teknik UK Limited | Thornhill | 2018 |
| Al-Borooj Urban Planning Ltd | Manchester | 2025 |
| Al-Miraj Moves Ltd | Cottingham | 2025 |
| Alab Environmental Services Limited | Newcastle Upon Tyne | 1992 |
| Alabed for General Trading Ltd | Manchester | 2025 |
| Alan Davies & SON Limited | Wednesbury | 2000 |
| Alan Hadley Limited | Reading | 1933 |
| Alan's Skip Hire Limited | Oswestry | 2003 |
| Alan's Skip Hire Wales Limited | Oswestry | 2005 |
| ALB Skips Ltd | Slough | 2019 |
| ALB Waste Removal Services Ltd | Warlingham | 2019 |
| Albagaia Limited | Linlithgow | 2012 |
| Albamet Ltd | Livingston | 2015 |
| Albany Aggregates Desborough Limited | Corby | 2018 |
| Albany Total Waste Limited | Wisbech | 2017 |
| Albany Trading Ltd | London | 2019 |
| Albatross Filtration Systems Ltd Limited | Chichester | 2025 |
| Albec Metal Company Limited | Glasgow | 2000 |
| Albert & Sons Limited | London | 2025 |
| Albert Draper & SON Limited | Hull | 1948 |
| Albert Looms Limited | Nottingham | 2015 |
| Albert Wharf Limited | London | 2025 |
| Albion Water Holdings Limited | Taunton | 2022 |
| Albion Water Limited | Taunton | 1995 |
| Albion Water Treatment Ltd | Aylesbury | 2019 |
| Albright Transfer Station Limited | Rainham | 1999 |
| Albus Environmental Limited | Swanley | 2012 |
| ALC Services (Scotland) Limited | Dumfries | 2016 |
| Alchem (Merseyside) Limited | Ellesmere Port | 1984 |
| Alchemize Limited | Maldon | 2001 |
| Alchemy Integrated Waste Solutions Ltd | Stevenage | 2023 |
| Alchemy Metals Group Limited | Stevenage | 2014 |
| Alchemy Metals Infrastructure Limited | Stevenage | 2014 |
| Alchemy Metals Limited | Stevenage | 1993 |
| Alchemy Metals Solutions Limited | Stevenage | 2014 |
| Aldamar (NO.1) Limited | Crumlin | 2024 |
| Aldamar Holdings Ltd | Crumlin | 2017 |
| Aldermaston Recycling Limited | Taplow Maidenhead | 2003 |
| Alderson Cleaning Services Ltd | Sunderland | 2005 |
| Aldridge Scrap Metal Limited | Chipping Norton | 2013 |
| Aleam Environmental Services Ltd | Leigh-On-Sea | 2019 |
| Alekta Ltd | Welling | 2022 |
| Aleon Solutions Ltd | London | 2024 |
| Alert Multi Services Ltd | Romford | 2016 |
| Alex and Vans Ltd | London | 2019 |
| Alex Banica Ltd | Stoke-On-Trent | 2023 |
| Alex Butter Landscaping Limited | Ballinluig | 1995 |
| Alex Eco Ltd | Thornton Heath | 2026 |
| Alex K Ltd | Rotherham | 2018 |
| Alex Waste Collection Ltd | London | 2024 |
| Alex. Smith Metals Limited | | 1970 |
| Alexander Burke & SON Limited | Industria, Greenock | 1982 |
| Alexander Dutton Limited | West Yorkshire | 1983 |
| Alexander Scott Oils Ltd | Glasgow | 2012 |
| Alexander Steel Limited | Liverpool | 2004 |
| Alexliv Services Ltd | Slough | 2019 |
| Alexmoveuk Ltd | London | 2025 |
| ALF Kyme Van Breakers Limited | Bacup | 2004 |