| Fromeplan Limited | Professional & scientific | 1981 |
| Front END Technologies Ltd | Information & communication | 2019 |
| Frosts(Cars)Limited | Wholesale & retail | 1952 |
| Full Cheq Games Ltd | Manufacturing | 2022 |
| Fusion 101 Limited | Information & communication | 2000 |
| Fusion Data Services Limited | Professional & scientific | 1996 |
| Future Scope Developments Limited | Construction | 2006 |
| G M Design & Print Limited | Manufacturing | 1995 |
| G-Nova Limited | Other services | 2007 |
| G.D. Jauns Builders Ltd. | Construction | 1993 |
| G.P. Curtis Limited | Professional & scientific | 2005 |
| Galaxy Labs Ltd | Professional & scientific | 2025 |
| Gamble Group Limited | Education | 2002 |
| Gardner & Scardifield Limited | Wholesale & retail | 1978 |
| Gary Prince Design Limited | Professional & scientific | 2006 |
| Gatekeeper Educational Ltd | Information & communication | 2003 |
| GED Duckworth Limited | Professional & scientific | 2005 |
| General Medical Ltd | Wholesale & retail | 2000 |
| George L. Johnson International Ltd. | Financial services | 2001 |
| George Potbury Forestry Limited | Agriculture & fishing | 2004 |
| Gerald Culliford Limited | Wholesale & retail | 1993 |
| GH Consultancy Services (Southern) Ltd | Professional & scientific | 2007 |
| Gilmour Limited | Professional & scientific | 2007 |
| Gismo Productions Ltd | Construction | 1997 |
| Glamour TKL Ltd | Other services | 2022 |
| Glazin & Berry Limited | Manufacturing | 1982 |
| Glencathara Residents Association Limited | Extraterritorial | 2004 |
| Glendale Plastering Limited | Construction | 2002 |
| Glimpse Consulting Ltd | Administrative & support | 2013 |
| Global Commercial Services Limited | Professional & scientific | 2004 |
| Global Sound Records Limited | Information & communication | 2006 |
| Globewall Limited | Real estate | 2001 |
| Goldfinch Physics Ltd | Professional & scientific | 2024 |
| Golf Special TEE Limited | Arts & recreation | 2006 |
| Good Plumbers Ltd | Construction | 2007 |
| Goodrowes of Chichester Limited | Manufacturing | 1943 |
| Goring Road Carpet Centre Limited | Wholesale & retail | 2006 |
| Grade SIX Limited | Professional & scientific | 2004 |
| Grafton Investments Limited | Real estate | 1988 |
| Graham Electricals Limited | Construction | 2003 |
| Graham Peacock Consulting Ltd | Information & communication | 2001 |
| Granary Way Property Management Limited | Real estate | 1988 |
| Granville Upholstery Limited | Other services | 2003 |
| Grayston Plant Limited | Professional & scientific | 1947 |
| GRB Bricks & Mortar (Southern) Ltd | Construction | 2006 |
| Great Books Learning Academy Ltd | Education | 2024 |
| Greatgood Ltd | Real estate | 2007 |
| Green Counties Vets Ltd. | Professional & scientific | 2005 |
| Green Roots Holdco Ltd | Financial services | 1975 |
| Greenacres (Horsham 2) Management Company Limited | Households | 1990 |
| Greenacres (Horsham 3) Management Company Limited | Households | 1990 |
| Greenacres (Horsham) Management Company Limited | Households | 1990 |
| Greenard's Garage Limited | Wholesale & retail | 2005 |
| Greens Pharmacy Limited | Wholesale & retail | 1997 |
| Gresham Business Finance Limited | Financial services | 2003 |
| Grimshaw Portfolio Limited | Real estate | 2001 |
| Grosvenor Services Limited | Administrative & support | 2025 |
| Grosvenorforce Limited | Other services | 1991 |
| Growth Associates Ltd | Professional & scientific | 2007 |
| Guardian Homes (UK) Ltd | Construction | 2001 |
| Gulliver Plumbing & Heating Ltd | Construction | 2026 |
| H P C Air Compressors Limited | Professional & scientific | 1958 |
| H3O Media Limited | Construction | 2001 |
| Haleberry Investments Limited | Real estate | 2003 |
| Halematch Limited | Hospitality | 1986 |
| Hallmark Carpentry & Construction Ltd | Construction | 2002 |
| Hallmark Travel Limited | Extraterritorial | 1993 |
| Hammerpond Homes Limited | Administrative & support | 2004 |
| Handyman Solutions (Horsham) Ltd | Administrative & support | 2025 |
| Hannets Estates Ltd | Real estate | 2015 |
| Hanwells and Sons Ltd. | Real estate | 2020 |
| Happy Van Mister Whippy Ltd | Hospitality | 2022 |
| Harbour Park Limited | Arts & recreation | 1977 |
| Hardys Precision Engineering Limited | Manufacturing | 2006 |
| Hargo Property Services Limited | Construction | 2003 |
| Harlequin Cleaners Limited | Other services | 1964 |
| Hart Deane Investments Limited | Other services | 2021 |
| Harwood Place Management Company Limited | Households | 1998 |
| Hawthorn Cottage Investments Limited | Other services | 2004 |
| Haywards Heath Town FC | Arts & recreation | 2020 |
| HD Advisory Limited | Professional & scientific | 2007 |
| Heartland Electrical Limited | Construction | 2002 |
| Heatsmart Limited | Administrative & support | 2002 |
| Helium Projects Limited | Professional & scientific | 1994 |
| Heminoak Limited | Real estate | 1995 |
| Herlee Media Limited | Information & communication | 2007 |
| Hetalogic Limited | Information & communication | 2017 |
| Hideaway Shoreham Ltd | Other services | 2023 |
| Highjoy Limited | Real estate | 2002 |
| Hillfield Garage Selsey Limited | Wholesale & retail | 2007 |
| Hillsboro Limited | Administrative & support | 2006 |
| Hire 2000 Limited | Construction | 1996 |
| HNS Associates Ltd | Information & communication | 2001 |
| Hocks Limited | Extraterritorial | 2007 |
| Hogs Land Properties Limited | Real estate | 2004 |
| HOI Tong Ltd | Hospitality | 2024 |
| Holborn Data Services Limited | Professional & scientific | 1997 |
| Holborn Nominees Limited | Professional & scientific | 1931 |
| Home From Home Nursery Limited | Education | 2003 |
| Homes Partnership Southern Limited | Real estate | 2001 |