| AVG Imperial Ltd | Stokesley | 2014 |
| AVH Parks Limited | Huntingdon | 2016 |
| AVI Asbestos Vehicle Inspection Ltd | Romsey | 2022 |
| Avid Pest Control Ltd | Greenford | 2002 |
| Aviora Developments Ltd. | Huddersfield | 2018 |
| Avista OIL Services (UK) Ltd | Stourport-On-Severn | 2010 |
| Avita Group Ltd | Stockton-On-Tees | 2026 |
| Avjones Limited | Exeter | 2019 |
| Avon Metals (2012) Limited | Salisbury | 2012 |
| Avon Specialty Metals Limited | Gloucester | 2012 |
| Avon Valley Water Limited | Exeter | 2008 |
| Avon Waste Disposal Ltd | Bristol | 2005 |
| Avondale Advanced Waste Treatment Limited | Manchester | 2008 |
| Avondale Environmental Limited | Liverpool | 1990 |
| Avondale Holdings Limited | Manchester | 1993 |
| Avram Eco Waste Ltd | Dagenham | 2025 |
| Avrio Nature Solutions Limited | Enniskillen | 2026 |
| AVS Cumbria Metals Limited | Maryport | 2002 |
| AVS Storage Solutions Limited | Maryport | 2016 |
| Avyor Ltd | Reading | 2024 |
| AW Jenkinson (Woodwaste) Limited | Bo'Ness | 1996 |
| AW Recyclingi Ltd | Grays | 2015 |
| Away With IT Waste Management Ltd | Buckhurst Hill | 2017 |
| AWB Recycling Limited | Liphook | 2012 |
| AWD (Group) Ltd | Port Talbot | 2015 |
| AWM Clearance Limited | Crawley | 2025 |
| AWR Skiphire Ltd | Stockport | 2023 |
| AWS Bidco Limited | Derby | 2020 |
| AWS Finco Limited | Derby | 2020 |
| AWS Midco Limited | Derby | 2020 |
| AWS Recycling Ltd | Birmingham | 2003 |
| AWS Topco Limited | Derby | 2020 |
| Awsm Recycling Limited | Richmond | 2007 |
| AXE Skip Hire Limited | Axminster | 2000 |
| AXE Total Limited | Kington | 2022 |
| AXE Waste Limited | Kington | 2022 |
| Axel Drainage Ltd | Tamworth | 2023 |
| Axiagen Services Limited | Tonbridge | 2025 |
| Axil Integrated Services Limited | Corby | 2014 |
| Axiom Building Solutions Limited | Sutton Coldfield | 2010 |
| Axiom Environmental Limited | Thetford | 2011 |
| Axion Recycling Ltd. | Liverpool | 2001 |
| Axis Enviro Ltd | Ipswich | 2025 |
| Axis Leaf Ltd | London | 2021 |
| Axis Property Logistics Ltd | London | 2025 |
| Axorium Environmental Ltd | Middlesbrough | 2026 |
| Axtion Ltd | Amlwch | 2020 |
| AYA OIL Limited | London | 2016 |
| Aycliffe Landfill Limited | Pocklington | 2003 |
| AYD Waste Management Ltd | London | 2014 |
| Ayitess Ltd | Cardiff | 2022 |
| Aylesbury Granulation Services Ltd | Aylesbury | 2014 |
| Aylesbury Recycling Composting (ARC) Limited | Staines-Upon-Thames | 2019 |
| Aylesford Processing Ltd | Cardiff | 2018 |
| Aylsham Slurry Services Ltd. | Norwich | 1998 |
| AYR Environmental Services Limited | Meadowhead Road, Irvine | 1999 |
| AYR Environmental Services Operations Limited | Meadowheadroad, Irvine | 1999 |
| AYR Skips Limited | Ayr | 2023 |
| AYR Waste Management Limited | Bourne | 2012 |
| Ayrshire Waste Management Limited | Bourne | 2012 |
| Ayrton & Co Ltd | Bournemouth | 2024 |
| AYZ Waste Solutions Limited | Stockport | 2024 |
| AZ and AM Limited | London | 2014 |
| AZ Waste Logistics Ltd | Ilford | 2026 |
| Azecta Limited | Nottingham | 2022 |
| AZS Group Limited | Preston | 2021 |
| Aztec Property Repairs Ltd | Dunmow | 2010 |
| Aztech Asbestos Services Ltd | Hull | 2024 |
| Aztech Environmental Services (UK) Limited | Cwmbran | 1998 |
| Azure & Green Environmental Limited | Bath | 2018 |
| Azure Water Treatment Services Ltd | St. Neots | 2010 |
| B & a Services (South West) Ltd | Paignton | 2025 |
| B & B Environmental Ltd | Southsea | 2026 |
| B & B Environmental Services Limited | Newport | 2013 |
| B & B Skip Hire Ltd | Beccles | 2002 |
| B & C Doors Limited | Biggleswade | 2004 |
| B & C Mckeown Limited | | 2008 |
| B & E Grab Services Limited | Ashford | 2012 |
| B & J Parr (Reclaimers) Limited | Mansfield | 1980 |
| B & K Animal Waste Services Ltd | Middlsex | 2025 |
| B & P Packaging Limited | Hants | 1986 |
| B & P Scrap Co. Limited | Rainham | 2005 |
| B & R Contracting Ltd | Congleton | 2025 |
| B & R White Ltd | Hinckley | 2011 |
| B & S Ltd | Dartford | 2025 |
| B & T Skip Hire Limited | Manchester | 1999 |
| B & W Skips Ltd | Bedford | 2026 |
| B & W Spinclean Solutions Ltd | Morden | 2025 |
| B & W Waste Management Services Limited | Bedford | 1994 |
| B a Shorthouse Limited | Bridgnorth | 1978 |
| B and a Property Clearances Ltd | Birmingham | 2024 |
| B and B Waste Ltd | London | 2018 |
| B and S Waste Removals Limited | Hove | 2025 |
| B C R Services Limited | West Bromwich | 2005 |
| B E B Drainage Limited | Crewe | 2019 |
| B G Enterprise Limited | Birmingham | 2019 |
| B Hygienic Limited | Stoke-On-Trent | 1999 |
| B K Waste Management Limited | Cochester | 2011 |
| B LEE & Sons Metals Limited | Leicester | 2014 |
| B Mccann Waste Management Limited | London | 2024 |