| Gorringes LLP | | 2006 |
| Goss Inc | | 2019 |
| Gote Barn Events Ltd | Hospitality | 2021 |
| GR Base Holdings Ltd | Financial services | 2024 |
| GR Base Limited | Agriculture & fishing | 2020 |
| Grace and Peril Limited | Arts & recreation | 2010 |
| Gracie Collins Limited | Wholesale & retail | 2013 |
| Graham Carlow Photography Limited | Information & communication | 2014 |
| Graham Festenstein Lighting Design Limited | Professional & scientific | 2009 |
| Grassington Farm Holdings Ltd | Financial services | 2024 |
| Grassington Farm Limited | Agriculture & fishing | 2020 |
| Graywood Quadrangle Owners Limited | Households | 1989 |
| Great Trodgers Farm Limited | Agriculture & fishing | 2018 |
| Greatwich Roofing Limited | Construction | 2015 |
| Green BUS Glamping Limited | Hospitality | 2016 |
| Green Business Team Ltd | Professional & scientific | 2025 |
| Green Heritage & Conservation Specialists Ltd | Construction | 2025 |
| Green Living Property Holdings Ltd | Real estate | 2026 |
| Green ME Ltd | Wholesale & retail | 2022 |
| Green Parent Media Ltd | Information & communication | 2015 |
| Green Structural Solutions Ltd | Construction | 2021 |
| Green Taxis Limited | Transport & logistics | 2023 |
| Green United C.I.C. | Education | 2020 |
| GREEN2GREEN Exchange Ltd. | Professional & scientific | 2011 |
| Greencuisine Trust | Hospitality | 2010 |
| Greene Wheels Limited | Wholesale & retail | 2020 |
| Greenfields Events Consulting Ltd | Professional & scientific | 2021 |
| Greensand Capital Limited | Administrative & support | 2011 |
| Greenscapes of Lewes Ltd | Administrative & support | 2025 |
| Greenwell Accounting Limited | Professional & scientific | 2012 |
| Greenwood CGS Ltd | Agriculture & fishing | 2026 |
| Greenworkforce Handyman Services Ltd | Construction | 2011 |
| Gregor Aymar Limited | Professional & scientific | 2020 |
| Greyfriars Court Limited | Health & social care | 1989 |
| GRH Engineers Ltd | Manufacturing | 2010 |
| Griffon Capital Management Ltd | Professional & scientific | 2026 |
| Grinfinity Ltd | Financial services | 2015 |
| Griston Lahaise Cross LLP | | 2010 |
| Guess U.K. Limited | Wholesale & retail | 2004 |
| Guild of Master Craftsman Publications Limited | Information & communication | 1979 |
| Guild of Master Craftsmen (International) Limited | Other services | 2012 |
| Guild of Master Craftsmen Limited (the) | Administrative & support | 1975 |
| Guild of Master Craftsmen Services Limited(The) | Administrative & support | 1976 |
| H Y Smartphone Ltd | Wholesale & retail | 2019 |
| H20 Pool Service Ltd | Administrative & support | 2022 |
| Habn Architects Limited | Professional & scientific | 2013 |
| Haggar Heating Ltd | Construction | 2021 |
| Hagstone Literature Ltd | Wholesale & retail | 2025 |
| Hairy Moose Limited | Professional & scientific | 2000 |
| Hale Farm Barn Ltd | Real estate | 2019 |
| Hale Farm Campsite Ltd | Hospitality | 2018 |
| Hale Farm Dairy Ltd | Hospitality | 2024 |
| Hale Farm Glamping Ltd | Hospitality | 2021 |
| Half the Sky Ltd | Professional & scientific | 2013 |
| Hallam Associates Limited | Education | 2021 |
| Halland Homes Ltd | Real estate | 2022 |
| Halo Social Ltd | Information & communication | 2017 |
| Halsey Hair Salon Limited | Other services | 2026 |
| Hames Groundcare Ltd | Administrative & support | 2022 |
| Hamm Agri Ltd | Manufacturing | 2022 |
| Hammick Editions Ltd | Arts & recreation | 2011 |
| Hampden Arms Sussex Limited | Hospitality | 2022 |
| Hanning's Property Ltd | Hospitality | 2016 |
| Hanover Displays Limited | Manufacturing | 1985 |
| Hapa Architects Limited | Professional & scientific | 2016 |
| Harbor Consulting (Surrey) Limited | Professional & scientific | 2020 |
| Harebell Estates Ltd | Professional & scientific | 2006 |
| Harmony Hounds Sussex Limited | Other services | 2024 |
| Harringtons Solicitors Limited | Professional & scientific | 2008 |
| Hart Contracts Limited | Wholesale & retail | 2018 |
| Hartfield Industrial Property Sussex Limited | Real estate | 2018 |
| Hartley Wholefoods Ltd | Health & social care | 2021 |
| Hartnell Creative Communication Limited | Arts & recreation | 1991 |
| Haru Izakaya Ltd | Hospitality | 2025 |
| Harvey's Animal Feeds Ltd | Wholesale & retail | 2024 |
| Hastingford Developments (Sussex) Limited | Construction | 2018 |
| Hastingford Developments Limited | Construction | 2002 |
| Hatley Print Limited | Manufacturing | 2004 |
| Hawkins Investments Limited | Real estate | 2001 |
| Hawksbill Limited | Professional & scientific | 2020 |
| Hawkshire Limited | Hospitality | 1972 |
| HBF Rentals Ltd | Transport & logistics | 2023 |
| Heavy Soul Films Ltd | Information & communication | 2013 |
| Helen Dunn Limited | Health & social care | 2006 |
| Helicon Event Management Limited | Extraterritorial | 2002 |
| Heliotrope Limited | Manufacturing | 1972 |
| Heller Ltd | Professional & scientific | 2012 |
| Henrietta Norton Nutrition Ltd | Other services | 2013 |
| Henry Wood Limited | Information & communication | 2016 |
| Herbert Scott Ltd | Financial services | 1994 |
| Hesmonds Stud Limited | Agriculture & fishing | 2010 |
| Hestia VS Properties and Investments LLC | | 2023 |
| Hexagon Supply Chain Limited | Professional & scientific | 2017 |
| High Speed Marketing Limited | Professional & scientific | 2011 |
| High Street Properties (EG) Limited | Real estate | 2018 |
| Highstop Limited | Real estate | 1987 |
| Higson Developments Limited | Construction | 2010 |
| Hill RAE Smith Associates Limited | Professional & scientific | 1987 |
| Hill Stone Wood Limited | Professional & scientific | 2021 |
| Hill Street PR Ltd | Professional & scientific | 2022 |