| Harry Building Services Limited | Construction | 2005 |
| Hart-Davis NET Limited | Information & communication | 2006 |
| Hartley Therapy Rooms Limited | Real estate | 2026 |
| Harts Grove Development Company Limited | | 1988 |
| Harvey & Thompson Limited | Financial services | 1991 |
| Harvey Stewart & Smith Limited | Health & social care | 2000 |
| Harwood Park Management Company Limited | Households | 1989 |
| Hash Automotive Ltd | Wholesale & retail | 2025 |
| Haslemere Educational Museum | Arts & recreation | 1996 |
| Haslemere Hall Trading Limited | Arts & recreation | 2014 |
| Haslemere Health Foods Limited | Wholesale & retail | 2004 |
| Haslemere Pilates Ltd | Education | 2012 |
| Haslemere Taxis Ltd | Transport & logistics | 2004 |
| Hastings Partners Limited | Real estate | 2016 |
| Hastings River Launches Limited | | 1959 |
| Hatmet Limited | Construction | 1988 |
| Hatto & Gibson Limited | Manufacturing | 1946 |
| Hawk Corporation Limited | Administrative & support | 2000 |
| Hawkins Carpentry Ltd | Construction | 2005 |
| Hawkins Property Investment & Development Limited | Construction | 1989 |
| Hawkinsport Limited | Wholesale & retail | 2007 |
| Hawstead Road Partnership LLP | | 2023 |
| Hawthorns Cars Limited | Wholesale & retail | 2004 |
| Hawthorns Educational Trust Limited (the) | Education | 1969 |
| Hayaan Trading Ltd | Wholesale & retail | 2024 |
| Hayley Properties Limited | Real estate | 2003 |
| Haylight Limited | Wholesale & retail | 2006 |
| Hazel Holker Associates Limited | Professional & scientific | 2004 |
| Hazmark Investments Limited | Real estate | 2007 |
| HB Tech Solutions Ltd | Manufacturing | 2025 |
| HBS Nominees Limited | Professional & scientific | 2001 |
| HBS Secretarial Services Limited | Professional & scientific | 2001 |
| HCA Building Services Limited | Wholesale & retail | 2007 |
| HDP Builders Ltd | Construction | 2024 |
| Head Forth Limited | Wholesale & retail | 2005 |
| Headbarbers Male Grooming Ltd | Other services | 2021 |
| Headland Project Management Limited | Professional & scientific | 2004 |
| Headley Village Hub Ltd | Wholesale & retail | 2025 |
| Headquarters Kingston Limited | Other services | 1998 |
| Heads Together Mindfulness Ltd | Other services | 2021 |
| Healey Construction & Maintenance Ltd | Construction | 2006 |
| Health Associates Limited | Health & social care | 2007 |
| Healthspan Wellness Retreats Ltd | Health & social care | 2024 |
| Hearwind Ltd | Real estate | 2020 |
| Heathcott Management Services Limited | Administrative & support | 1989 |
| Heathrow Builders Limited | Construction | 2002 |
| Heathrow LDV Limited | Wholesale & retail | 2005 |
| Heaven Consulting Limited | Information & communication | 2004 |
| Heaverestate.Co.Uk. Ltd | Real estate | 2005 |
| Hector`S Global Hair With Zeal Limited | Other services | 2004 |
| Helen Renate Associates Ltd | Information & communication | 2016 |
| Helgad Ltd. | Wholesale & retail | 2010 |
| Help Solutions Ltd | Information & communication | 1996 |
| Hemisha Properties Limited | Real estate | 2024 |
| Hendon Court Developments Limited | Construction | 2001 |
| Henry International Limited | Professional & scientific | 1974 |
| Henzo Food Ltd | Hospitality | 2024 |
| Herb and Hill Construction Limited | Construction | 1998 |
| Hermes Health Ltd. | Health & social care | 2003 |
| Hermitage Management Limited | Households | 1985 |
| Heron Building Services Limited | Construction | 1979 |
| Herons Wood Properties Limited | Administrative & support | 1964 |
| Heronsmill Limited | Real estate | 2020 |
| Hestia Properties Ltd | Real estate | 2002 |
| Hethersett Management Company Limited | Households | 1995 |
| Hewitt Media Ltd. | Professional & scientific | 2002 |
| Hewsel Limited | Wholesale & retail | 1962 |
| Hewston Limited | Households | 1987 |
| Hexagon E16 Ltd | Transport & logistics | 2017 |
| HG Freehold Limited | Households | 2022 |
| HHR Education Ltd | Education | 2000 |
| Hi-Spec Decorating Services Ltd | Construction | 2017 |
| Hi-Tech Records Limited | Manufacturing | 1986 |
| Highblue Investments Ltd | Real estate | 2023 |
| Highbrook Hall LLP | | 2025 |
| Higher Drive Management Limited | Households | 2005 |
| Highgrove Control Systems Ltd | Professional & scientific | 1993 |
| Highland Dragon (UK) Limited | Wholesale & retail | 2004 |
| Highlight Property Limited | Real estate | 2003 |
| Highline Travel Limited | Transport & logistics | 2006 |
| Highpoint Business Solutions Limited | Professional & scientific | 2000 |
| Hillacre Management Limited | Households | 1981 |
| Hillbeach Limited | Information & communication | 2005 |
| Hilliard Brothers (Ewell) Limited | Real estate | 1978 |
| Hillside (Raymond Court) Management Limited | Real estate | 2002 |
| Hillsview Cornwall Limited | Hospitality | 2014 |
| Himshi Investment Subco Limited | Financial services | 2026 |
| Hira Investments Limited | Real estate | 2004 |
| Historic Homes Limited | Extraterritorial | 2001 |
| Historystore Limited | Arts & recreation | 2000 |
| Historyworld Limited | Arts & recreation | 2000 |
| HKS Tech Limited | Mining & quarrying | 2003 |
| HMV Developments Limited | Construction | 2007 |
| Hobson IT Consultants Ltd | Information & communication | 1997 |
| Hoho (UK) Limited | Administrative & support | 2021 |
| Holborns Limited | Wholesale & retail | 2003 |
| Holcroft Solutions Limited | Information & communication | 2007 |
| Holisticise Ltd | Other services | 2018 |
| Hollfield House Residents Association Limited | Households | 1993 |
| Holly Court (Carshalton) Residents Company Limited | Households | 1984 |