| Healing Power Ltd | Health & social care | 2023 |
| Health Design Solutions Limited | Professional & scientific | 2012 |
| Healthier Lives Ltd | Manufacturing | 2017 |
| Healthy Consulting Limited | Professional & scientific | 2008 |
| Heathrow Vertiport Ltd | Transport & logistics | 2021 |
| Hegarty Way Ltd | Construction | 2025 |
| Henius Ltd | Wholesale & retail | 2022 |
| Henry Alice Holdings Limited | Real estate | 2021 |
| HER Fairway CIC | Health & social care | 2025 |
| Heyland Landscapes Limited | Professional & scientific | 2013 |
| Hfnrf Ltd | Transport & logistics | 2022 |
| HI Spec Decorating & Maintenance Limited | Other services | 2006 |
| Hide Paving Ltd | Administrative & support | 2020 |
| Higgs & BEW Holdings Limited | Professional & scientific | 2013 |
| Higgs & BEW Steel Ltd | Construction | 2014 |
| High Ground Partners Ltd | Professional & scientific | 2026 |
| High Trees Stable Block Management Limited | Households | 1988 |
| Hilltop TV Ltd | Information & communication | 2021 |
| Hive Property Operations Ltd | Hospitality | 2022 |
| Hodges Roofing Limited | Construction | 2020 |
| Hogarth Pharmacy Limited | Wholesale & retail | 2000 |
| Hollie Residents Ltd | Households | 2022 |
| Hollybush Business Centre Limited | Real estate | 2005 |
| Home and Leisure Group Ltd | Agriculture & fishing | 2021 |
| Home Pride Lettings Ltd | Real estate | 2023 |
| Homemaids South East Limited | Administrative & support | 2003 |
| Honest Eats Limited | Wholesale & retail | 2023 |
| Hookwood Developments Limited | Construction | 2021 |
| Horizon 90 ES Ltd | Construction | 2024 |
| Horley Arch Garage Ltd | Wholesale & retail | 2021 |
| Horley Business Guild Ltd | Other services | 2022 |
| Horley Chiropody & Podiatry Limited | Health & social care | 2014 |
| Horley CZ Ltd | Hospitality | 2023 |
| Horley Electrical Services Ltd | Construction | 2024 |
| Horley Fish & Chips Limited | Hospitality | 2025 |
| Horley Food & Wine Limited | Wholesale & retail | 2024 |
| Horley Glass Limited | Construction | 2009 |
| Horley Home Care & Maintenance Limited | Construction | 2023 |
| Horley Kitchen Ltd | Hospitality | 2025 |
| Horley Lawn Tennis Club | Arts & recreation | 2012 |
| Horley MOT Centre Limited | Wholesale & retail | 2018 |
| Horley Motor & Engineering Company Ltd | Wholesale & retail | 2015 |
| Horley Motorcycle Services Ltd | Wholesale & retail | 2022 |
| Horley Nails Limited | Other services | 2019 |
| Horley Restaurant Limited | Hospitality | 2017 |
| Horley Spice Ltd | Hospitality | 2026 |
| Horley Sports & Social Club Ltd | Arts & recreation | 2020 |
| Horne Hedgerow Habitat Ltd | Households | 2022 |
| Hot and WET Heating Services Limited | Construction | 2021 |
| Hourglass Solutioned Ltd | Construction | 2024 |
| Howell Construction Limited | Construction | 2017 |
| HP CON Limited | Real estate | 2025 |
| HR on Demand Ltd | Professional & scientific | 2022 |
| HR Tech Unified Ltd | Professional & scientific | 2024 |
| Hubbard VL Limited | Transport & logistics | 2023 |
| Hugh Global Ltd | Hospitality | 2021 |
| Hughes Construction Group Ltd | Construction | 2025 |
| Hurleybird Ltd | Information & communication | 2013 |
| Hushh Limited | Other services | 2020 |
| Hushh Training Limited | Education | 2021 |
| HW Polo Limited | Agriculture & fishing | 2018 |
| Hyde Commercials Ltd | Wholesale & retail | 2020 |
| Hygenie Clean Ltd | Administrative & support | 2019 |
| Hymitservices Limited | Information & communication | 2016 |
| I D Finance Limited | Financial services | 2009 |
| I F Trns Ltd | Transport & logistics | 2025 |
| I Need Solutions Limited | Professional & scientific | 2020 |
| I Own Dubai Ltd | Financial services | 2026 |
| I P Top Services Ltd | Transport & logistics | 2020 |
| I.J.S Events Ltd | Hospitality | 2025 |
| IAN Taylor Body Repairs Limited | Wholesale & retail | 2002 |
| IAT Consultancy Limited | Information & communication | 2016 |
| Ibes Care Solution Ltd | Health & social care | 2022 |
| Ibex Cars Limited | Transport & logistics | 2023 |
| Ichicoo Park Limited | Arts & recreation | 2023 |
| Iconic Entertainment Ltd | Information & communication | 2018 |
| ICY Cool Limited | Manufacturing | 2018 |
| ID Residential Limited | Real estate | 2010 |
| ID8 Solutions Ltd | Construction | 2017 |
| Igloo Construction and Project Management Ltd | Construction | 2010 |
| Ikejoy Limited | Real estate | 2024 |
| Iloilo Consultancy Limited | Professional & scientific | 2017 |
| IMA Online Ltd | Education | 2024 |
| IMA Studios Ltd | Education | 2015 |
| IMH Management Ltd | Arts & recreation | 2017 |
| Impact Telemarketing Limited | Professional & scientific | 2006 |
| Impress First Cleaning Service Ltd | Administrative & support | 2025 |
| Improved Health Care Limited | Health & social care | 2015 |
| Inclusion Rewritten Ltd | Administrative & support | 2026 |
| Indigo One Limited | Professional & scientific | 2011 |
| Infin Consulting Ltd | Professional & scientific | 2024 |
| Infinity Construction (South East) Holdings Ltd | Financial services | 2018 |
| Infinity Construction (South East) Ltd | Construction | 2021 |
| Infinity Living #2 Ltd | Real estate | 2026 |
| Inflatable FUN Ltd | Professional & scientific | 2021 |
| Inicio Consulting Limited | Professional & scientific | 2024 |
| Inkforge Creations Ltd | Information & communication | 2025 |
| Innerhaven CIC | Administrative & support | 2015 |
| Innosafe Ltd. | Hospitality | 2021 |
| Institute of Machine Woodworking Technology Limited(The) | Other services | 1966 |