| Sweetbriar Limited | Andover | 2004 |
| Sweeting Brothers (Land Drainage) Limited | Goole | 1971 |
| Swep Tech Limited | Bromley | 2025 |
| Swews Ltd | Llandovery | 2024 |
| Swgrabhire Ltd | Swindon | 2023 |
| Swift (NW) Limited | Worsley | 2003 |
| Swift Delivery Network Ltd | Birmingham | 2023 |
| Swift FIX Services Ltd | Wigan | 2024 |
| Swift Force Haulage Limited | Gravesend | 2019 |
| Swift Recycling Limited | Portsmouth | 2018 |
| Swift Services TN Ltd | Ilford | 2020 |
| Swift Skips (Hull) Limited | Pocklington | 2003 |
| Swift UK Property Investments Ltd | Bury St. Edmunds | 2023 |
| Swift Waste MCR Ltd | London | 2021 |
| Swift Waste Removals Ltd | London | 2020 |
| Swift Water Technologies Ltd | Farnborough | 2020 |
| Swiftclear London Ltd | London | 2026 |
| Swiftclearsolutions Ltd | Poole | 2025 |
| Swiftdrains Ltd | London | 2026 |
| Swiftflow Solutions Ltd | Hildenborough | 2024 |
| Swifthaul Logistics Ltd | Rotherham | 2025 |
| Swifthaul UK Services Ltd | London | 2025 |
| Swiftplan Services Limited | Essex | 1984 |
| Swiftpoint Solutions Ltd | Lincoln | 2026 |
| Swifty Clearances Limited | London | 2025 |
| Swindon Grab Hire Limited | Swindon | 2013 |
| Swindon Metal Recycling Limited | Swindon | 2008 |
| Swindon Muck Away Ltd | Swindon | 2019 |
| Swindon Water Softeners Ltd | Chippenham | 2023 |
| Swinnerton Bros. Limited | Manchester Lancashire | 1948 |
| Swinney Skip Hire Ltd | Sunderland | 2021 |
| Swinton Waste Removal Limited | Manchester | 2024 |
| Swisco Limited | Torquay | 2019 |
| Switch Hub Limited | Birmingham | 2017 |
| Switching Skips Services Ltd | Leeds | 2025 |
| Switchscot Ltd | Glasgow | 2026 |
| SWM & Waste Recycling Limited | Barnstaple | 2002 |
| SWM Metals Ltd | Hemel Hempstead | 2025 |
| Swoop Energy & Recycling Limited | Beaconsfield | 2025 |
| Swrd Ltd | Milton Keynes | 2014 |
| Swrnewstar Limited | High Wycombe | 2017 |
| SWS Waste Management Ltd | Glasgow | 2024 |
| Swswales Limited | Bangor | 2014 |
| Swtr (Wiltshire) Ltd | Saltash | 2022 |
| SWW Trading and Training Services Ltd | Rotherham | 2023 |
| SX GRP Ltd | Colchester | 2026 |
| SX Realisations Limited | West Yorkshire | 1926 |
| SY Recycling Ltd | London | 2026 |
| Sycamore Gardens Management Limited | Newquay | 2006 |
| Sykes Metals Limited | Nuneaton | 2011 |
| Sykes OIL Services Limited | Sutton Coldfield | 2020 |
| Sylwester Waste Management Ltd | Hemel Hempstead | 2016 |
| Symbio Waste Solutions Ltd | Stockport | 2015 |
| Symbiotic Solutions Limited | Ipswich | 2008 |
| Symphony Recycling Technologies Limited | Borehamwood | 2006 |
| Synergen Group Limited | Huntingdon | 2010 |
| Synergy Asset Services Limited | Canterbury | 2001 |
| Synergy Recycling Ltd | Slough | 2022 |
| Synergy Tradeco UK Limited | Hamilton | 2020 |
| Synergy Tyres (Midlands) Ltd | Daventry | 2017 |
| Systemic Solutions Group Limited | London | 2024 |
| Sytch Water Scheme Limited | Wolverhampton | 2017 |
| SZ Trade&Logistic Ltd | Rotherham | 2019 |
| Szymonbudrze Ltd | Harlow | 2023 |
| T & B Recycling Limited | Swindon | 2021 |
| T & C Drainage Services Limited | Loughborough | 2007 |
| T & C Metal Recycling Limited | Hornchurch | 2007 |
| T & C Recycling Limited | Milton Keynes | 2021 |
| T & L Bennett Skips Ltd | Ashford | 2017 |
| T & N Hill Waste Services Essex Ltd | Folkestone | 2018 |
| T & O Drainage and Plumbing Ltd | Southend-On-Sea | 2018 |
| T & S Environmental Limited | Essex | 2005 |
| T & S Threadgold Limited | Brackley | 2002 |
| T & T Haulage & Aggregates Limited | Birmingham | 2010 |
| T & W Resources Limited | Ross-On-Wye | 2025 |
| T - Miniskips Limited | Fareham | 1988 |
| T a W Recycling Limited | Ilkeston | 2016 |
| T a Water Consultants Ltd | Hitchin | 2021 |
| T C Skip Hire Ltd | Stoke On Trent | 2012 |
| T C Water Services Limited | Didcot | 2011 |
| T D J Williams Waste Limited | Ross-On-Wye | 2017 |
| T D Tyre Recycling Ltd | Carmarthen | 2010 |
| T E Watson (Waste) Limited | Ripon | 2024 |
| T Evans Plant Hire & Groundworks Ltd | Shrewsbury | 2016 |
| T Goodman Equine Limited | Stratford-Upon-Avon | 2019 |
| T J Hayes & SON Ltd | Chester | 2009 |
| T J Skips Ltd | Sittingbourne | 2015 |
| T J Turner & SON Limited | Dudley | 2006 |
| T J Waste & Recycling Limited | Fareham | 2004 |
| T K Collections Ltd | Oldham | 2026 |
| T L Drainage Ltd | Dartford | 2025 |
| T L Price Limited | Newark | 2004 |
| T M S Surfacing Limited | Sittingbourne | 2017 |
| T M Waste Limited | Maghera | 2009 |
| T M Whitfield General Dealers Ltd | Exeter | 2012 |
| T MAC Environmental UK Ltd | Bourne | 2015 |
| T R Skiphire Limited | Bedford | 2003 |
| T R Tankers Ltd | Ashford | 2026 |
| T Varey Contracts Limited | Larkhall | 2011 |
| T W Jones & Sons (HFD) Limited | Hereford | 2021 |