| Star Plus Drain Cleaning Service Limited | Oldham | 2023 |
| Star Refuse Collection Services Ltd | St. Ives | 2022 |
| Star Services 1 Ltd | West Drayton | 2025 |
| Star Skips Ltd | Slough | 2015 |
| Starfish Environmental & Asbestos Services Limited | Motherwell | 2022 |
| Starfort Technologies Ltd | London | 2020 |
| Starship Earth Limited | Doncaster | 2020 |
| Statemove Limited | Swansea | 2015 |
| Station Approach (Brock) Ltd | Weymouth | 2023 |
| Station Yard Holdings Limited | Exeter | 2012 |
| Statom Remediation Ltd | Grays | 2024 |
| Staverton Joinery Limited | Bath | 1966 |
| Staverton Limited | London | 1991 |
| Stay Care Operations Ltd | Bridgend | 2025 |
| Stay Clean (Whitby) Ltd | North Yorks | 2003 |
| Staysafe PPE Limited | Bridgnorth | 2016 |
| STD Civils Limited | Beds | 2006 |
| Steadfast Industrial Services Limited | Solihull | 1992 |
| Stealth Waste Management Ltd | Hatfield | 2025 |
| Stedetrad Waste Ltd | Cardiff | 2020 |
| Stedetradsteel (MCR) Ltd. | Cardiff | 2020 |
| Stedetradsteel.(Eng) Ltd. | Cardiff | 2009 |
| Steel County Ltd | Barnsley | 2026 |
| Steel Drains Limited | Littlehampton | 2021 |
| Steele Waste Removal Ltd | Llanelli | 2025 |
| Steelway Haulage Midlands Limited | Nottingham | 2024 |
| Stef Waste Recycling Ltd | London | 2025 |
| Stella Skips Ltd | Tilbury | 2023 |
| Stels Company Limited | Reading | 2024 |
| Stempster Trading Ltd | Talmine | 2018 |
| Stenlakes Limited | Cornwall | 2003 |
| Stennetts Ltd | Cranleigh | 1983 |
| Step UP Recycling Ltd | Trelewis | 2020 |
| Stephen Betts and Sons Limited | Birmingham | 1978 |
| Stephens Smartwaste Limited | Wigan | 2015 |
| Steptoe Salvage Ltd | Belfast | 2019 |
| Steptoe's Recycling Ltd | Altham, Accrington | 2022 |
| Steptoes Cart Limited | Bedford | 2022 |
| Stereau (UK) Limited | Leeds | 1990 |
| Stericlean (UK) Limited | Daventry | 2005 |
| Sterion Innovation Ltd | Kington | 2024 |
| Sterling Commodities Limited | | 1993 |
| Sterling Environmental Group Ltd | Ruislip, | 2025 |
| Sterling Haulage London Limited | Nottingham | 2024 |
| Sterling Hydrotech Limited | London | 1988 |
| Sterling Metals Warrington Ltd | Stockport | 2017 |
| Sterling Polymers Ltd | Rushden | 2021 |
| Steve & Aaron Waste Logistics Ltd | Chatham | 2025 |
| Steve Caunce Limited | St Helens | 1999 |
| Steve Hastings Drain Services Limited | Blackpool | 2008 |
| Steve Parker Services Ltd | Castle Cary | 2019 |
| Steve Slark Consultancy Ltd | Broadstairs | 2013 |
| Steve's Maintenance Services Ltd | Maidenhead | 2009 |
| Steve's Scrap Metal Collections Ltd | Coventry | 2026 |
| Stevediane Limited | Liverpool | 2008 |
| Stevemar Metal Reclamations Limited | Berkshire | 1977 |
| Steven Hughes Waste Management Ltd | Surbiton | 2012 |
| Stevenage Skip Hire Limited | London | 2005 |
| Stevens Services Ltd | Kingston Upon Thames | 2020 |
| Steward Environmental Services Ltd | Braintree | 2021 |
| Steward Recycling Limited | Colindale | 2024 |
| Stewart Recovery and Recycling Limited | Birmingham | 2025 |
| Stewart Ward Holdings Limited | County Durham | 2025 |
| Stewarts Scrap Metal Recycling Ltd | London | 2026 |
| STG Water Desalination and Membrane Treatment Technologies Ltd | Dagenham | 2023 |
| Stiens Waste Recycling Limited | Swansea | 2017 |
| Stingaciu Nicolae Ltd | Coventry | 2023 |
| Stirling Silver Ltd | Newport | 2022 |
| Stirling Water Seafield Holdings Limited | Dunfermline | 1998 |
| Stirling Water Seafield Limited | Dunfermline | 1998 |
| STK Commodities Limited | London | 2023 |
| STL Environmental Limited | Hereford | 2024 |
| STM Consultants Ltd | Stockton-On-Tees | 2013 |
| Stockbury Stone Limited | Horsham | 2025 |
| Stockport Skips Limited | Stockport | 2017 |
| Stockton Window Centre Limited | Stockton On Tees | 1988 |
| Stocky Barrels Ltd | Tipton | 2024 |
| Stoke Clear & Pave Ltd | Stoke-On-Trent | 2026 |
| Stoke Drainage Services Ltd | Stoke-On-Trent | 2022 |
| Stoke on Trent Rubbish Removal Ltd | Stoke-On-Trent | 2025 |
| Stoke Recycling Ltd | Stoke-On-Trent | 2024 |
| Stoke Waste Collective Limited | Hope Valley | 2018 |
| Stokebinservices Limited | Stoke-On-Trent | 2026 |
| Stokesley Metals Ltd | Stallingbrough | 2014 |
| Stone Building Solutions Ltd | Ilfracombe | 2026 |
| Stone Cast Solutions Ltd | Rayleigh | 2020 |
| Stone Paving Services Ltd | Romford | 2019 |
| Stone Wind Ltd | London | 2025 |
| Stonebridge Metals Ltd | Nottingham | 2021 |
| Stonebridge Waste Management Ltd | Essex | 2025 |
| Stonegrave Aggregates Limited | Pocklington | 1970 |
| Stoneguard Technologies Limited | Ascot | 2012 |
| Stonehewer Limited | Ealing | 2013 |
| Stonehill Services Ltd | Bristol | 2010 |
| Stonelands Spring Water Ltd | Teignmouth | 2013 |
| Stoneleigh Close Management Company (Silverdale) Limited | Carnforth | 1999 |
| Stones Waste Management Limited | London | 2025 |
| Stopcor Limited | London | 2016 |
| STORE4BIZ Limited | Redhill | 2008 |
| Storefield Environmental Limited | Kettering | 2011 |