| Highcroft Residents Company Limited | Professional & scientific | 1993 |
| Higher US Limited | Transport & logistics | 2018 |
| Highfield Court (Bookham) Management Limited | Households | 2006 |
| Highfields Road Management Limited | Real estate | 2014 |
| Highway Traffic Solutions Limited | Construction | 2016 |
| Highwoods Horticulture Ltd | Professional & scientific | 2025 |
| Hilgay Court Residents Association Limited | Households | 1975 |
| Hillyrays Limited | Health & social care | 2024 |
| Hinson System Services Ltd | Information & communication | 2017 |
| Hislop Advisory Ltd | Administrative & support | 2023 |
| HLD Capital Limited | Professional & scientific | 2017 |
| HMF Surrey Ltd | Real estate | 2024 |
| Hmra Limited | Households | 2014 |
| HN Investment Limited | Real estate | 2017 |
| Holdeen Limited | Professional & scientific | 2006 |
| Holiday Cottage Mortgages Limited | Financial services | 2018 |
| Holiday Homes in France Ltd | Professional & scientific | 2023 |
| Holly Hill Park Management Company Limited | Households | 2002 |
| Holly Lodge (Raynes Park) Residents Company Limited | Households | 1996 |
| Holm Court (Twycross Road, Godalming) Management Company Limited | Households | 1985 |
| Home Cooking by Elizabeth Limited | Hospitality | 2013 |
| Home Counties (Horsham) Limited | Construction | 1991 |
| Home Farm Management Company Limited(The) | Households | 1982 |
| Home Heat Solutions Ltd | Construction | 2026 |
| HOME2B Ltd | Real estate | 2023 |
| Homecert Ltd | Construction | 2015 |
| Homewater House Residents Association Limited | Households | 1989 |
| Hook Property Investments Ltd | Real estate | 2026 |
| Hookwood Holdings Limited | Professional & scientific | 2021 |
| Hoot Limited | Wholesale & retail | 1996 |
| Hope Care Recruitment Limited | Health & social care | 2023 |
| Horndon Scaffolding Limited | Construction | 2015 |
| Horse Couriers Limited | Wholesale & retail | 2017 |
| Horsley News Limited | Wholesale & retail | 2015 |
| Horsley Pilates Limited | Arts & recreation | 2004 |
| Horsley Thoroughfares Limited | Real estate | 1993 |
| Horsley Wine Shop Ltd | Wholesale & retail | 2024 |
| Host Logic Limited | Information & communication | 2016 |
| House of Echo Ltd | Professional & scientific | 2025 |
| HOUSE11 Events Ltd | Arts & recreation | 2024 |
| Howard Hutton & Associates Limited | Construction | 2010 |
| Howard Oakmont Investments Ltd | Real estate | 2018 |
| Howard Oakmont Ltd | Administrative & support | 2017 |
| Howard Place Residents Limited | Households | 1999 |
| HQR Ltd | Information & communication | 2025 |
| HS Builders London Ltd | Construction | 2020 |
| HSC Systems Ltd | Information & communication | 2024 |
| Hsdp Byron Quarter LLP | | 2022 |
| Hsdp Nominee Limited | Professional & scientific | 2021 |
| HSK Hospitality Limited | Administrative & support | 2016 |
| Hub Property Care Ltd | Construction | 2016 |
| Hudson Electrics Limited | Administrative & support | 2018 |
| Hugh Wagstaff Consultancy Ltd | Professional & scientific | 2025 |
| Humidity Solutions Limited | Energy | 2008 |
| Hungry DP Ltd | Hospitality | 2022 |
| Hunter Valley Capital Management Ltd | Administrative & support | 2013 |
| Hunts Hygiene Installations Ltd | Administrative & support | 2023 |
| Hurst Warne & Partners Surveyors Limited | Professional & scientific | 2017 |
| HUZ Ltd | Wholesale & retail | 2026 |
| HW Vehicle Group Ltd | Administrative & support | 2026 |
| HWM Property Management Ltd | Real estate | 2024 |
| HWR Nominee Limited | Professional & scientific | 2019 |
| HWR Phase 1 Demo Stages 3 - 10 LLP | | 2021 |
| HWR Phase 1 Stage 1 LLP | | 2019 |
| HWR Phase 1 Stage 2 LLP | | 2021 |
| Hyatt & SON Ltd | Households | 2024 |
| Hybrid Carpentry & Conversions Ltd | Construction | 2024 |
| Hygge Catering & Events Ltd | Hospitality | 2023 |
| Hylands Group Ltd | Wholesale & retail | 2019 |
| Hylands Property Group Limited | Real estate | 2022 |
| Hypotion Limited | Professional & scientific | 2009 |
| I'M Here I Matter Limited | Professional & scientific | 2017 |
| IAN Abbey Consulting Ltd | Professional & scientific | 2026 |
| IAP Konsult Ltd | Professional & scientific | 2019 |
| IBA Group Holdings Limited | Professional & scientific | 2015 |
| IBA Group Limited | Professional & scientific | 1988 |
| ICC Asset Finance Ltd | Financial services | 2024 |
| ICC Automotive Ltd | Wholesale & retail | 2017 |
| Icon Lifts Ltd | Manufacturing | 2019 |
| ICS ICH Limited | Construction | 2017 |
| ICS Industrial Commercial South Limited | Construction | 2023 |
| Ideal Governance Limited | Professional & scientific | 2025 |
| Ideas Origination Limited | Information & communication | 2025 |
| IDENTITY9 Limited | Information & communication | 2023 |
| Idyess Limited | Information & communication | 2018 |
| IFS Family Wealth Advisers Ltd | Financial services | 1998 |
| Ignition Corporate Finance LLP | | 2011 |
| Ignition Corporate Finance Partners Ltd | Professional & scientific | 2017 |
| Ikin DO IT Ltd | Construction | 2021 |
| Ikona Court (Weybridge) Residents Association Limited | Households | 1964 |
| Ildiko's Artisan Chocolates Ltd | Manufacturing | 2017 |
| Iloj Limited | Professional & scientific | 2014 |
| Impact XM Europe Limited | Administrative & support | 2009 |
| Impact XM Limited | Administrative & support | 1991 |
| IN My Mind Ltd | Arts & recreation | 2021 |
| In-Toto Interactive Limited | Professional & scientific | 2017 |
| Incalmo (Residential) Limited | Professional & scientific | 2021 |
| Incus Media Limited | Professional & scientific | 2012 |
| Incyte Biosciences UK Ltd | Wholesale & retail | 2012 |
| IND Comm South Limited | Construction | 2019 |