| Healthvista Solutions Ltd | Edinburgh | 2025 |
| Healthwatch Sunderland Ltd | Sunderland | 2011 |
| Healthy Backs Limited | Glasgow | 2000 |
| Healthy Business Works Ltd | Burnley | 2016 |
| Healthy Grillz Limited | Pinner | 2018 |
| Healthy Homes, Healthy Lives Limited | London | 2021 |
| Healthy Hooves Europe Ltd | Coventry | 2009 |
| Healthy Hooves Ltd | Coventry | 2009 |
| Healthy Living Direct Limited | Driffield | 2000 |
| Healthy Options Limited | London | 1996 |
| Healthy Paws Limited | Leicester | 2012 |
| Heanor Brewing Company Limited | Stafford | 2013 |
| Heanova Group Lifescience Limited | Mildenhall | 2011 |
| Heanton Meadow Mgmt Co Limited | Barnstaple | 2024 |
| Heapdean Limited | London | 1978 |
| Heappey Construction Services Limited | Derby | 2014 |
| Hear Again Berkshire Ltd | Wokingham | 2026 |
| Hear Works Limited | Birmingham | 2020 |
| Hearcare Hub Limited | Edgware | 2024 |
| Heard Environmental Services Limited | Basildon | 2006 |
| Heard Literary Works Limited | Rugby | 2024 |
| Heareka Holdings Ltd | London | 2025 |
| Heargonomic Ltd | Milton Keynes | 2024 |
| Hearing Express Ltd | Abergavenny | 1997 |
| Hearing Help Ltd | Lincoln | 2015 |
| Hearing Protection Limited | London | 2012 |
| Hearne 1963 Limited | Sittingbourne | 2013 |
| Heart & Home Limited | Rotherham | 2012 |
| Heart & Soul Beauty Ltd | Bristol | 2013 |
| Heart (R)Evolution Ltd | Manchester | 2024 |
| Heart 2 Heart Compassionate Care Ltd | Bath | 2019 |
| Heart Business Ltd | London | 2022 |
| Heart Editions Limited | St. Leonards-On-Sea | 2001 |
| Heart Guided Home Care Ltd | Leicester | 2023 |
| Heart Intelligent Wealth Ltd | Haverfordwest | 2024 |
| Heart Loyalty Confidence Ltd | Haverfordwest | 2023 |
| Heart Mind Body & Soul Limited | Farnham | 2024 |
| Heart of England Events Limited | Coventry | 1995 |
| Heart of the Levels Limited | Langport | 2008 |
| Heart of Wood Limited | Bromyard | 2007 |
| Heart Park Limited | Coventry | 2021 |
| Heart Pods Limited | Coventry | 2021 |
| Heart Restarter Limited | Leeds | 2011 |
| Heart- Awareness Ltd | London | 2023 |
| Heart-Club Ltd | Cambridge | 2021 |
| HEART2HEALTH Limited | London | 2022 |
| Heartbeat Interactive Ltd | Warrington | 2025 |
| Heartdub Limited | London | 2019 |
| Heartfulhealth Innovations Ltd | Edinburgh | 2025 |
| Heartgart Ltd | Manchester | 2023 |
| Hearth & Hall Limited | London | 2025 |
| Hearthmont Whyte Limited | York | 2026 |
| Hearthstone Advisers Limited | London | 2013 |
| Hearthstone Investments (FP) Limited | London | 2014 |
| Hearthstone Investments (GP) Limited | London | 2014 |
| Hearthstone Investments (GP2) Limited | London | 2019 |
| Hearthub Group Ltd | Preston | 2018 |
| Heartland Coffee Ltd | Llandudno | 2013 |
| Hearts Medical Limited | Morden | 2022 |
| Heartsculpt Innovations Ltd | London | 2025 |
| Heartsolutionnow. Ltd | London | 2022 |
| Heartwired Ltd | Bristol | 2020 |
| Heartwood Care Ltd | Ilford | 2010 |
| Heartwood Fostering Services Ltd | Ilford | 2010 |
| Heartz Ltd | Gloucester | 2024 |
| Heas (UK) Limited | Huddersfield | 2006 |
| Heat and Combustion Supplies Limited | Newbury | 1991 |
| Heat Direct GAS Ltd | Tadcaster | 2008 |
| Heat Doctor Limited | Leigh | 2003 |
| Heat for Hire (Scotland) Limited | Stirlingshire | 1977 |
| Heat Infra-Red Ltd | Loughborough | 2022 |
| Heat on Time Ltd | Benfleet | 2024 |
| Heat Pumps Sheffield Limited | Sheffield | 2022 |
| Heat Pumps to Go Ltd | Brough | 2022 |
| Heat Solutions (N.E.) Limited | Wallsend | 2013 |
| HEAT2000MAINTENANCE Ltd | Wigan | 2011 |
| HEAT4FEET Limited | Epsom | 2024 |
| Heatboss Limited | Ballyclare | 2014 |
| Heatcoal Limited | Cardiff | 2012 |
| Heatflux GAS Services Ltd | Birmingham | 2023 |
| Heatguarduk Ltd | Longfield | 2025 |
| Heath & Heather Limited | Manchester | 2005 |
| Heath & Wiltshire Security Ltd | Westbury | 2013 |
| Heath Electrical Limited | Weston-Super-Mare | 2023 |
| Heath END Land Limited | Great Missenden | 2012 |
| Heath Farm (2) Limited | Bolton | 1991 |
| Heath Farm Barn Limited | Leamington Spa | 2017 |
| Heath Scientific Company Limited | London | 1994 |
| Heath Trade Plastics Ltd | Cardiff | 2021 |
| Heathcote Care Homes Limited | Poole | 2012 |
| Heathcote Future Connections Limited | Chesterfield | 2010 |
| Heathcote Penthouse Ltd | London | 2022 |
| Heathcote Plumbing and Heating Limited | Droitwich | 2010 |
| Heathdale Limited | London | 2012 |
| Heather ANN Morgan Limited | Fraserburgh | 2024 |
| Heather House Rental Ltd | Coalville | 2013 |
| Heather Jane Devine Limited | Burton-On-Trent | 2021 |
| Heather Kemp Limited | Chesterfield | 2024 |
| Heather Moor Advisory Team Ltd | Manchester | 2026 |
| Heather Path Capital Management Ltd | Manchester | 2026 |