| Affinity Water Limited | 1000 to 4999 staff | 24.8% | 28.0% |
| Amentum (UK) LTD. | 250 to 499 staff | 42.7% | 14.9% |
| Anglian Water Business (National) Limited | 250 to 499 staff | 15.3% | 49.4% |
| Anglian Water Services Limited | 5000 to 19,999 staff | 12.3% | 33.2% |
| Ao Recycling Limited | Less than 250 staff | -2.0% | 5.0% |
| Associated Waste Management Limited | 250 to 499 staff | 7.5% | 11.0% |
| Avh Parks Limited | 250 to 499 staff | 6.4% | 40.5% |
| Bagnall & Morris (Waste Services) Ltd | 500 to 999 staff | 22.0% | 12.0% |
| Biffa Municipal Limited | 1000 to 4999 staff | 1.7% | 5.6% |
| Biffa Treatment Services Limited | 500 to 999 staff | 2.4% | 17.6% |
| Biffa Waste Services Limited | 5000 to 19,999 staff | -1.2% | 29.0% |
| Bristol Waste Company Limited | 500 to 999 staff | 17.2% | 46.0% |
| Bywaters (Leyton) Limited | Less than 250 staff | -11.2% | 41.4% |
| Canal & River Trust | 1000 to 4999 staff | -9.8% | 33.1% |
| Castle Water Limited | 250 to 499 staff | 5.7% | 31.0% |
| Cheshire West Recycling Limited | 250 to 499 staff | -36.3% | 16.0% |
| Clearabee Limited | 250 to 499 staff | -18.5% | 4.0% |
| Commercial Services Kent Limited | 500 to 999 staff | 1.2% | 60.3% |
| Countrystyle Recycling Limited | 500 to 999 staff | 15.7% | 17.2% |
| Donald Ward Limited | 250 to 499 staff | 10.5% | 20.2% |
| Dwr Cymru Cyfyngedig | 1000 to 4999 staff | 5.6% | 27.0% |
| Emr Group Limited | 1000 to 4999 staff | 8.3% | 15.9% |
| Enva England Limited | 250 to 499 staff | 12.4% | 8.5% |
| Enva Scotland Limited | 250 to 499 staff | -20.4% | 31.3% |
| Enviroclean (Scotland) Limited | 250 to 499 staff | 5.0% | 10.8% |
| Erith Contractors Limited | 250 to 499 staff | 30.0% | 2.1% |
| Fcc Waste Management Limited | 1000 to 4999 staff | -1.2% | 9.8% |
| First Mile Limited | 250 to 499 staff | 15.2% | 15.9% |
| Future Industrial Services Limited | 250 to 499 staff | 0.3% | 24.6% |
| Grundon Waste Management Limited | 500 to 999 staff | 8.2% | 10.8% |
| H W Martin Waste Limited | 500 to 999 staff | 4.0% | 9.3% |
| Hills Municipal Collections Limited | 250 to 499 staff | 0.4% | 11.4% |
| Hsl Compliance Ltd | 250 to 499 staff | 23.7% | 6.3% |
| Integrated Water Services Limited | 250 to 499 staff | 3.9% | 18.6% |
| Lanes Group Limited | 1000 to 4999 staff | 9.9% | 12.3% |
| M J Church (Plant) Limited | 250 to 499 staff | -1.0% | 20.7% |
| Marlowe Environmental Services Limited | 500 to 999 staff | 40.8% | 27.0% |
| Mulholland Contracts Limited | 250 to 499 staff | 79.9% | 0.0% |
| Nathans Waste Savers Limited | 250 to 499 staff | 0.0% | 41.0% |
| North Somerset Environment Company Limited | 250 to 499 staff | 7.0% | 18.0% |
| Northumbrian Water Limited | 1000 to 4999 staff | 9.9% | 31.0% |
| Nuvia Limited | 500 to 999 staff | 22.2% | 11.2% |
| Nwh Group Limited | 250 to 499 staff | 1.6% | 19.8% |
| Personnel Hygiene Services Limited | 1000 to 4999 staff | -1.7% | 33.5% |
| Peterborough Limited | 250 to 499 staff | 2.0% | 34.4% |
| Portsmouth Water Limited | 250 to 499 staff | 5.0% | 26.0% |
| Powerday PLC | 250 to 499 staff | 8.9% | 10.7% |
| R. Collard Limited | 250 to 499 staff | 16.7% | 8.3% |
| Reconomy (UK) Limited | 500 to 999 staff | 11.4% | 40.0% |
| Recorra Ltd | 250 to 499 staff | 5.0% | 30.0% |
| Restore Technology Limited | 250 to 499 staff | -14.0% | 24.0% |
| Rhodar Industrial Services Limited | 250 to 499 staff | 22.9% | 3.8% |
| Rsk Environment Limited | 500 to 999 staff | 12.2% | 28.4% |
| S. Norton & Co Limited | 250 to 499 staff | -1.0% | 10.6% |
| Sapphire Utility Solutions Limited | 1000 to 4999 staff | 8.2% | 12.5% |
| Scottish Water Business Stream Limited | 250 to 499 staff | 2.6% | 49.0% |
| Severn Trent Services Operations UK Limited | 250 to 499 staff | 3.5% | 16.0% |
| Severn Trent Water Limited | 5000 to 19,999 staff | 5.4% | 31.0% |
| Sewells Reservoir Construction Limited | 250 to 499 staff | -5.0% | 15.0% |
| Sharpsmart Limited | 250 to 499 staff | 2.3% | 23.3% |
| Smith's (Gloucester) Limited | 250 to 499 staff | 6.8% | 10.0% |
| South East Water Limited | 1000 to 4999 staff | 20.0% | 22.7% |
| South Staffordshire Water PLC | 250 to 499 staff | 19.5% | 19.2% |
| South West Water Limited | 1000 to 4999 staff | 4.9% | 26.0% |
| Southern Water Services Limited | 1000 to 4999 staff | -6.8% | 29.8% |
| Suez Recycling And Recovery UK Ltd | 5000 to 19,999 staff | -0.9% | 20.4% |
| Sutton And East Surrey Water PLC | 250 to 499 staff | 10.0% | 24.8% |
| Swisco Limited | 250 to 499 staff | -6.6% | 17.9% |
| Thames Water Utilities Limited | 5000 to 19,999 staff | 8.8% | 28.0% |
| Totally Local Company Limited | 500 to 999 staff | 7.7% | 40.0% |
| Tradebe Management Limited | 500 to 999 staff | 1.6% | 17.9% |
| Ubico Limited | 500 to 999 staff | 3.4% | 13.4% |
| United Utilities Water Limited | 5000 to 19,999 staff | 13.3% | 33.8% |
| Veolia Es Hampshire Ltd | 250 to 499 staff | 13.2% | 8.9% |
| Veolia Es Merseyside & Halton Limited | 250 to 499 staff | 20.4% | 4.3% |
| Veolia Es Sheffield Limited | 250 to 499 staff | 3.0% | 13.6% |
| Veolia Es Shropshire Limited | 250 to 499 staff | -1.9% | 8.7% |
| Veolia Es Southwark Limited | 250 to 499 staff | 20.4% | 7.1% |
| Veolia Water Outsourcing Limited | 250 to 499 staff | 17.5% | 8.8% |
| Vws (UK) Ltd | 250 to 499 staff | 5.0% | 19.0% |
| Water Plus Limited | 250 to 499 staff | 23.9% | 43.0% |
| Wessex Water Services Limited | 1000 to 4999 staff | 2.0% | 26.3% |
| Yorkshire Water Services Limited | 5000 to 19,999 staff | 3.3% | 26.0% |
| Yorwaste Limited | 250 to 499 staff | 4.6% | 25.4% |