| Hatenboer-Water Limited | London | 2023 |
| Hatton Management Ltd | London | 2024 |
| Hattusha Services Ltd | Waltham Abbey | 2025 |
| Haughey Metals Limited | Co Armagh | 2005 |
| Haulage Pro Ltd | London | 2025 |
| Haulage World Ltd | Station Approach | 2013 |
| Haulaway (Skips) Limited | Eastbourne | 2017 |
| Hauling&Disposal Ltd | London | 2026 |
| Havering Demolition & Recycling Limited | Benfleet | 2013 |
| Havering Waste Management Company Ltd | Hornchurch | 2026 |
| HAW Waste Limited | Basildon | 2025 |
| Hawbridge Properties Ltd | Kidderminster | 2021 |
| Hawes Skip Hire Limited | High Wycombe | 2008 |
| Hawk BIO Solutions Ltd | Northampton | 2024 |
| Hawk Drainage and Groundworks Ltd | Northampton | 2023 |
| Hawk Environmental Services Ltd | Ulceby | 2017 |
| Hawk General Ltd | London | 2021 |
| Hawk Rubbish Clearance Ltd | Wembley | 2014 |
| Hawkins & Scott Ltd | Tadworth | 2011 |
| Hawkins Insulation Limited | Hengrove | 1987 |
| Hawkmoor Cottages Residents Association Ltd | Newton Abbot | 1993 |
| Hawkridge Water Limited | Dulverton | 2004 |
| Hawkvale Limited | Prescot | 2018 |
| Hawthorn Technical Services Limited | Great Yarmouth | 2008 |
| HAY Enterprises Ltd. | Londonderry | 2022 |
| HAY Regenerative Soils CIC | Hereford | 2022 |
| Haymes Goods and Services Ltd | Blackpool | 2026 |
| Haynes Skip Hire Limited | Uxbridge | 2018 |
| Haystack Leads Ltd | Brough | 2025 |
| Hayward & Cook Limited | Birmingham | 1959 |
| Hayward Radiological Protection Services Limited | Aylesbury | 2018 |
| HAZ Environmental Limited | Birmingham | 2021 |
| HAZ Waste Ltd | Ormskirk | 2025 |
| HAZ-2-GO Ltd | Cottenham | 2005 |
| Haz-Bins Ltd | Surbiton | 2026 |
| Hazard Clean Ltd | Banbury | 2025 |
| Hazardous Area Remediation Limited | Fareham | 2023 |
| Hazardous Waste Management Limited | Winchester | 2009 |
| Hazardust Ltd | Broxbourne | 2026 |
| Hazcare Limited | North Ferriby | 2015 |
| Hazchem Waste Management Limited | Reading | 2026 |
| Hazclear Limited | Willenhall | 2019 |
| Hazcom UK Limited | Birmingham | 2024 |
| Hazcore Limited | Eastleigh | 2026 |
| Haze Cleansing Services Limited | Letchworth Garden City | 2019 |
| Hazell and Jefferies Limited | Pangbourne | 1971 |
| Hazell Recycling Ltd | Harrow | 2023 |
| Hazexperts Limited | Daventry | 2019 |
| Hazgo Limited | Windsor | 2014 |
| Hazgon Limited | Shotts | 2022 |
| Hazibag UK Limited | Brentwood | 2016 |
| Hazlemere Climate Group CIC | High Wycombe | 2024 |
| Hazpack Ltd | Stoke-On-Trent | 2026 |
| Hazport Limited | Wem | 2009 |
| Hazrem Environmental Ltd | High Wycombe | 2004 |
| Hazrok Ltd | Bristol | 2025 |
| Hazsafe Limited | Henley | 2008 |
| Hazsol Environmental Limited | Ayr | 2024 |
| Hazwaste Environmental Limited | Manchester | 2000 |
| Hazwheels Limited | Avonmouth | 2020 |
| HB Skips Ltd | Telford | 2023 |
| Hbclearance Limited | Rickmansworth | 2025 |
| HBL Logistics Ltd | Dalkeith | 2024 |
| HBP Management Limited | Kidlington | 1985 |
| HBR Midlands Limited | Birmingham | 2012 |
| HBS Waste Ltd | York | 2026 |
| HCD Skips Limited | Hereford | 2018 |
| HCL Myco Ltd | Winchester | 2023 |
| HCP Removals Ltd | London | 2025 |
| HD Grab Hire Ltd | London | 2024 |
| HD Waste Commercial Ltd | Newport | 2022 |
| HD Waste Removals Ltd | Plymouth | 2026 |
| HDK Waste Removal Ltd | Huddersfield | 2023 |
| HDL Services Limited | Stafford | 2015 |
| HDL Waste Ltd | Carlisle | 2023 |
| Heads of the Valley Salvage Limited | Dowlais Top | 1980 |
| Headway Point Limited | Seaham | 2012 |
| Health, Education, Literacy and Safety Programme for ALL (Helpa) International | London | 2008 |
| Healthguard Hygiene Services Limited | Driffield | 2004 |
| Healy Utilities Ltd | Cardiff | 2018 |
| Heart of England Environmental Services Limited | Solihull | 2026 |
| Heartlands Pallets & Recycling Ltd | Birmingham | 2025 |
| Heat From Waste Ltd | Writtle | 2014 |
| Heatdoc Plumbing & Heating Limited | Benfleet | 2018 |
| Heath Clearance & Removals Ltd | London | 2021 |
| Heath Road Environmental Ltd | Darlaston | 2015 |
| Heather Contracts Limited | Coventry | 2016 |
| Heathrow Metal Recycling Ltd | Ashford | 2023 |
| Heathrow Skips Limited | Southall | 2025 |
| Heathrow Waste Management Ltd | Iver | 2019 |
| Heathstead Limited | Kings Langley | 2026 |
| Heatting Consult Limited | London | 2014 |
| Heavy Vehicle Services Limited | Bradford | 2019 |
| Hebs Flowtech Ltd | Liverpool | 2019 |
| Hector Diaz Limited | Manchester | 2020 |
| Hector Moore Limited | Keighley | 1952 |
| Hefin Thomas Agri Contractors Limited | Holyhead | 2005 |
| Heights Solutions Ltd | London | 2014 |
| Heilan Loos Toilet Hire Ltd | Grantown-On-Spey | 2015 |
| Heise Drainage Limited | Preston | 2019 |