| High-Tech Fire and Security Limited | Skegness | 2015 |
| Highfield Recruit and Assessment Limited | Doncaster | 2018 |
| Highforce Advisory Limited | Tamworth | 2023 |
| Highland Race Equality Limited | Inverness | 2009 |
| Highopes Ltd | Aylesbury | 2024 |
| Highpoint Safety Ltd | Tunbridge Wells | 2018 |
| Hillfarm Fire Barrier Specialists Ltd | Wellingborough | 2025 |
| Hillingar Limited | Hove | 2008 |
| Hillside Solutions Limited | Wolverhampton | 2025 |
| Hillside Support Group Ltd | Nottingham | 2022 |
| Hillsview Limited | Erith | 2020 |
| Hilltel Care Ltd | Swindon | 2022 |
| Hilltop Fire Protection Ltd | Tring | 2025 |
| Hiltonshepperson Ltd | Cardiff | 2020 |
| Himo Solutions Ltd | Kidderminster | 2019 |
| Hindai Care Ltd | Harrow | 2022 |
| Hindsight Planning Solutions Limited | Kendal | 2020 |
| Hinges Holding Limited | Bristol | 1999 |
| Hirsch Secure UK Ltd | Coventry | 1998 |
| Hirtenberger Defence International Ltd | Salisbury | 2016 |
| Historic England Limited | Swindon | 2014 |
| Hivale Services Limited | Wells | 2013 |
| Hive Fire Safety Ltd | Norwich | 2022 |
| Hive House Ltd | Droitwich | 2024 |
| Hive Wellness Ltd | London | 2025 |
| Hiyed CIC | Bishop Auckland | 2023 |
| HJC Education Limited | Hereford | 2023 |
| HK3 Limited | Portsmouth | 2018 |
| HKJ Consultancy Ltd | Manchester | 2022 |
| Hkscc Ltd | Leicester | 2024 |
| Hkwh Consultancy Ltd | Beddington | 2018 |
| HL Health Board CIC | Romford | 2024 |
| HLS Social Work Limited | Stafford | 2017 |
| Hlth Care Ltd | Liverpool | 2023 |
| HM Recruitment Partner Ltd | Stoke-On-Trent | 2025 |
| Hm&K Limited | Salford | 2024 |
| HMB Legal Ltd | London | 2025 |
| Hmfs Consultants Ltd | Cove | 2025 |
| HMH Support Services Ltd | Rotherham | 2022 |
| HMO Fire Risk Assessment Ltd | 235-239 High Road | 2025 |
| HMT Fire Protection Ltd | Gravesend | 2019 |
| HNS Consultancy Ltd | Rickmansworth | 2025 |
| Hnzabk Ltd | Southall | 2025 |
| Hobbs Precision Ltd | London | 2025 |
| Hocrest Ltd | Chobham | 2019 |
| Hola Support Services Limited | Whitley Bay | 2025 |
| Holdfast Training Services Limited | Kent | 2000 |
| Holistic Care Companions -HCC Ltd | Gillingham | 2024 |
| Holistic Conversations Hub Ltd | Ipswich | 2021 |
| Holistic Domiciliary and Health Care Ltd | London | 2023 |
| Holistic Fire Safety Ltd | Barton-Upon-Humber | 2019 |
| Holistic Health Care Training and Services Ltd | Liverpool | 2024 |
| Holistic Mastery CIC | London | 2022 |
| Holistic Reach Consultancy Ltd | Bishop'S Stortford | 2023 |
| Holistic Santé Limited | Blackpool | 2024 |
| Holistic Support Services Ltd | Thornton Heath | 2018 |
| Holistique Care and Wellness Ltd Ltd | Bicester | 2023 |
| Holly and Emily Limited | Harlow | 2016 |
| Holly Chat Ltd | London | 2024 |
| Holly’S Hub Ltd | London | 2024 |
| Holywood Care at Home Limited | Holywood | 2025 |
| Home at Heart Care Limited | Evesham | 2025 |
| Home Care Angels Ltd | Chesterfield | 2026 |
| Home Care Recruitment Limited | Hounslow | 2020 |
| Home First OT Solutions Limited | Orpington | 2023 |
| Home Grown Independence Ltd | Ashton-Under-Lyne | 2023 |
| Homecare North East CIC | Gateshead | 2012 |
| Homefrank Diverse Services Ltd | Sheffield | 2024 |
| Homefront Matters Ltd | London | 2023 |
| Homely Supported Living Ltd | Ilford | 2018 |
| Homeroots Together Living CIC | Birmingham | 2026 |
| Homesafe Essex Limited | Brentwood | 2017 |
| Honest Care Services Ltd | Wellingborough | 2019 |
| Honest Home Care Ltd | Barnsley | 2020 |
| Honey Badger Clan Ltd | Northwich | 2020 |
| Honey Buzzard Care Services Ltd | London | 2025 |
| Honeycured Care Ltd | Bristol | 2023 |
| Honeyshade Limited | Tilbury | 2022 |
| Honorable Care Ltd | Stoke-On-Trent | 2021 |
| Hooyoswithoutborders Ltd | Edgware | 2023 |
| Hope Fountain Community Care Limited | Leeds | 2025 |
| Hope IS Here NOW Limited | Shifnal | 2024 |
| Hope Springs Health Group Ltd | Witham | 2025 |
| Hope Training and Care Services Ltd | Sheffield | 2022 |
| HOPE4CARE Limited | London | 2021 |
| Hopeleigh Star Children's Residential Homes Ltd | Peterborough | 2025 |
| Hopereaching United CIC | Liverpool | 2023 |
| Hopespringshealthcare Limited | Walsall | 2023 |
| Horeb Healthcare Solution Ltd | Basingstoke | 2026 |
| Horizon Academy of Science and Technology Ltd | Manchester | 2025 |
| Horizon Consultancies Ltd | Barrow-In-Furness | 2013 |
| Horizon Maritime Solutions Ltd | Chesterfield | 2014 |
| Hornchurch Business Improvement District Limited | Woodford Green | 2025 |
| Hortensia Health Ltd | London | 2022 |
| Hospital Access Online Ltd | Bedford | 2017 |
| Hough & Blyth Limited | Sheffield | 2024 |
| House of Boomboom Foundazion Empowering Limited | West Drayton | 2026 |
| House of DAN Communities Ltd | London | 2022 |
| House of Flowers Foundation | London | 2025 |
| House of Grant Ltd | Manchester | 2024 |