| Hollybush Place Management Limited | Households | 2004 |
| Hollyfort Limited | Real estate | 1988 |
| Holnicmad Limited | Information & communication | 2005 |
| Holtgate Properties Limited | Real estate | 2000 |
| Holy Spirit and Love Prayer Outreach | Other services | 2018 |
| Home Connection UK Ltd | Real estate | 2001 |
| Home EPC Limited | Other services | 2007 |
| Home Farm Residents Company Limited | Administrative & support | 1962 |
| Home Investment Properties Ltd | Real estate | 2020 |
| Home Meadow (Banstead) Management Limited | Households | 1991 |
| Home of Leather Ltd | Wholesale & retail | 2019 |
| Home-Shield (Southern) Limited | Construction | 2022 |
| Home-Start Surrey Heath | Health & social care | 2005 |
| Homecare (Southern) Limited | | 1980 |
| Homefine Residents Co. Limited | Households | 1989 |
| Homefy Limited | Real estate | 2017 |
| Homehigh Limited | Households | 2003 |
| Homemade Music Limited | Arts & recreation | 2002 |
| Homemarvel Limited | Households | 2007 |
| Homer Distribution Limited | Professional & scientific | 2000 |
| Homestretcher Limited | | 1989 |
| Honeysuckle Gifts Limited | Wholesale & retail | 2007 |
| Hook Road Motors Ltd | Wholesale & retail | 2007 |
| Hope Consultants International Ltd. | Professional & scientific | 1997 |
| Hopridge Limited | Professional & scientific | 1985 |
| Horley Tyre & Exhaust Limited | Wholesale & retail | 2005 |
| Horncliffe Limited | Professional & scientific | 2007 |
| Horne Engall and Freeman LLP | | 2007 |
| Horsham Construction Limited | Wholesale & retail | 2003 |
| Horti Technique Holland Ltd | Construction | 2006 |
| Hospitality Finance Solutions Limited | Professional & scientific | 2003 |
| Hotel Development Kettering Limited | Construction | 2007 |
| Hotfrost Limited | Wholesale & retail | 1965 |
| House Interim Management Limited | Professional & scientific | 2007 |
| House of Emotive Limited | Administrative & support | 2020 |
| House Trader (UK) Limited | Real estate | 2005 |
| Housemartins (Property) Limited | Construction | 2003 |
| Housemartins (Surbiton) Limited | Professional & scientific | 2006 |
| Howe & White Limited | | 1940 |
| HP Practice Ltd | Health & social care | 2021 |
| Hr-Fundamentals Limited | Professional & scientific | 2002 |
| HSE Direct Limited | Administrative & support | 2000 |
| Ht&T Construction Ltd | Construction | 2006 |
| Ht&T Project Management Ltd. | Professional & scientific | 1998 |
| HTS Design Limited | Construction | 2002 |
| Hubinvest Ltd. | Information & communication | 1999 |
| Hucclecote Care Ltd | Health & social care | 2004 |
| Hudson Conway (Oxted) Ltd | Professional & scientific | 2006 |
| Hume Whitehead Limited | Professional & scientific | 2007 |
| Humphrey (Property Services) Limited | Other services | 2003 |
| Hunter & Hyland Limited | Manufacturing | 1980 |
| Huntley Consulting Limited | Professional & scientific | 2010 |
| Hunts(Textiles)& Co,Limited | Real estate | 1952 |
| Huntsville Construction Ltd | Real estate | 2018 |
| Huntsville Solutions Ltd | Professional & scientific | 2022 |
| Huringa Ltd | Information & communication | 2016 |
| Hurst Road Management Limited | Households | 2007 |
| Hurtwood Properties Ltd | Real estate | 2024 |
| Hustle Hiit Limited | Health & social care | 2024 |
| Hy-Ten Group Limited | Manufacturing | 1965 |
| Hy-Ten Limited | Manufacturing | 1958 |
| Hybe Trading Limited | Wholesale & retail | 2023 |
| Hydons Flowers Community Interest Company | Agriculture & fishing | 2021 |
| Hydrus Investment Management LLP | | 2017 |
| Hyperweb Limited | Information & communication | 2012 |
| Hyundai Motor UK Limited | Wholesale & retail | 2005 |
| I Karahi House Ltd | Hospitality | 2018 |
| I Like Mondays Limited | Professional & scientific | 2006 |
| I Will Tile Ltd | Real estate | 2003 |
| I-Ce Accelerator Limited | Information & communication | 2002 |
| I-Qualitas Limited | Information & communication | 2005 |
| I-Trade Views Limited | Real estate | 2018 |
| I.D.L. Engineering Services Limited | Manufacturing | 2000 |
| IAN Phillips Painting & Decorating Ltd | Construction | 2004 |
| IAN Thake Ltd | Wholesale & retail | 2004 |
| Iarchitecture Limited | Information & communication | 2003 |
| Ibex Contracts Limited | Construction | 2007 |
| Icon Rocklear UK Ltd | Wholesale & retail | 2023 |
| ID & JD Services Limited | Information & communication | 2005 |
| IDC Advisory Limited | Financial services | 1996 |
| Ideal Wine Company Limited | Hospitality | 2011 |
| Ideas and Patents Limited | Professional & scientific | 1998 |
| Ident Design Limited | Administrative & support | 2003 |
| IDO UK Property LLP | | 2024 |
| Ig&Bo Ltd | Construction | 2025 |
| Iglo Consultancy Limited | Transport & logistics | 2014 |
| IIT Consulting Limited | Information & communication | 2005 |
| Ikigai Services Limited | Real estate | 2019 |
| IL Preferito Ltd | Hospitality | 2019 |
| Ilgs Ltd. | Information & communication | 1998 |
| Illusions Agency Ltd | Arts & recreation | 2008 |
| Ilovani Consulting Limited | Professional & scientific | 2006 |
| Imadz Limited | Information & communication | 2006 |
| Image Partnership Ltd | Professional & scientific | 2006 |
| Immanuel Childcare Ltd | Education | 2006 |
| Imperial Park Country Club Properties Limited | Professional & scientific | 1994 |
| Import Colombia Ltd | Wholesale & retail | 2020 |
| Impulse Engineering Limited | Construction | 1986 |
| Impulse Engineering Service Limited | Other services | 1986 |
| IN Press Printing | | 1997 |