| First Mile Networks Ltd | Information & communication | 2014 |
| First Southmead Limited | Administrative & support | 2007 |
| First Wellness Testing Group UK Ltd | Health & social care | 2025 |
| FL Advisory Ltd | Professional & scientific | 2026 |
| Flag Ecology Limited | Professional & scientific | 2012 |
| Flashwalls Limited | Information & communication | 1997 |
| Fleetclean -UK Ltd | Wholesale & retail | 2021 |
| Fletcher Centre Properties Ltd | Real estate | 2012 |
| Fletcher in RYE CIC | Administrative & support | 2009 |
| Flogo Group Limited | Manufacturing | 2016 |
| Flogo Life Limited | Wholesale & retail | 2022 |
| Floweroffice Limited | Professional & scientific | 2003 |
| Flying Fantastic Limited | Arts & recreation | 2011 |
| Foulkeswarner Ltd | Real estate | 2022 |
| Francesca Rowan Plowden Ltd | Information & communication | 2023 |
| Frangella Sansone Limited | Administrative & support | 2022 |
| Franklin Commercial Ltd | Real estate | 2020 |
| Free People Consulting Limited | Professional & scientific | 2013 |
| Frewen Educational Trust Limited(The) | Education | 1967 |
| Frustrative Ltd | Wholesale & retail | 2019 |
| FTB Group Ltd | Professional & scientific | 2021 |
| FTB Parties Ltd | Professional & scientific | 2021 |
| FTB Security Ltd | Administrative & support | 2021 |
| G & N Property Servives South East Ltd | Construction | 2022 |
| G Mehta Auction Limited | Health & social care | 2022 |
| G Mehta Holdings Limited | Financial services | 2022 |
| G Mehta Ltd | Health & social care | 2015 |
| G.E Saunders Forestry Contractors Ltd | Agriculture & fishing | 2006 |
| Gabrielle Parker Clothing Limited | Wholesale & retail | 2022 |
| GAJ Electrical Services Ltd | Construction | 2019 |
| Gallery Garden Rooms & Glazing Limited | Construction | 2022 |
| Gamma Epsilon Ltd | Information & communication | 2025 |
| Gandy's Lane Management Company Limited | Agriculture & fishing | 2020 |
| Gaskell Dynamics Ltd | Financial services | 2022 |
| Gavin Price & Sons Limited | Real estate | 2026 |
| GB Retail Consulting Limited | Administrative & support | 2015 |
| GC Project Services Limited | Professional & scientific | 2024 |
| Genevieve Edwards Creative Ltd. | Information & communication | 2016 |
| Genotype Studio Ltd | Professional & scientific | 2025 |
| Getenergy Field Ready Ltd | Professional & scientific | 2015 |
| Gillshaw Capital Ltd | Professional & scientific | 2026 |
| Gladeview Estates Limited | Households | 1998 |
| GM DEN LAB LLP | | 2022 |
| GM Dent PAY Limited | Health & social care | 2023 |
| GM Head Office Limited | Real estate | 2022 |
| Gmdental Ashford Ltd | Health & social care | 2021 |
| Gmehtapropertybarnet Ltd | Health & social care | 2020 |
| GMF Holdings Limited | Information & communication | 2016 |
| Gmvalley Limited | Health & social care | 2021 |
| Golden Fleece (RYE) Limited | Extraterritorial | 1977 |
| Goodwin Maintenance Limited | Professional & scientific | 2013 |
| Goodwin PPM Ltd | Administrative & support | 2024 |
| Grammar School Holdings Ltd | Real estate | 2021 |
| Grandstone Properties Ltd | Real estate | 2026 |
| Green Cleen (East Sussex) Limited | Health & social care | 2024 |
| Green House Interiors Ltd | Wholesale & retail | 2021 |
| Grey Eminence Limited | Administrative & support | 2025 |
| Greyhound Holdings Ltd | Real estate | 2026 |
| Griffin Court Freehold Ltd | Real estate | 2014 |
| Grill Kebab Shop Ltd | Hospitality | 2024 |
| Gurney Close Management Limited | Households | 2021 |
| Gypsy Rose Sets Limited | Wholesale & retail | 2022 |
| H & R Sussex Properties Limited | Real estate | 2025 |
| H&H Trees Limited | Agriculture & fishing | 2025 |
| H2FD Limited | Hospitality | 2024 |
| Hakko House Ltd | Hospitality | 2023 |
| Hallwood Solutions (Kent/Sussex) Limited | Construction | 2021 |
| Hand and Jones Ltd | Manufacturing | 2020 |
| Hands of Hope | Health & social care | 2017 |
| Hannington Gilbert & Co. Limited | Construction | 1983 |
| Harbour Property Investments Ltd | Real estate | 2018 |
| Hare & Hounds (RYE) Ltd | Hospitality | 2015 |
| Hare & Hounds Campsite Ltd | Hospitality | 2016 |
| Harriet Reeve Consulting Co Ltd | Professional & scientific | 2023 |
| Harrison Wright (Sussex) LLP | | 2008 |
| Hastings & Bexhill Wood Recycling Limited | Water & waste | 2012 |
| Hastings Building Supplies Ltd | Wholesale & retail | 2022 |
| Haydens Event Catering Ltd | Hospitality | 2023 |
| Health Angel Ltd | Hospitality | 2024 |
| Heart Smart Arts Ltd | Education | 2020 |
| Hedonist Products Ltd | Administrative & support | 2015 |
| Helena Baldowska Ltd | Health & social care | 2015 |
| Hellwing Limited | Wholesale & retail | 2022 |
| Helvetica Limited | Construction | 2025 |
| Helvetii Partners Ltd | Professional & scientific | 2021 |
| Helvetii Ventures Ltd | Extraterritorial | 2020 |
| Heritage Decorating Ltd | Construction | 2023 |
| Hewsongs Limited | Arts & recreation | 2004 |
| Hfspventures Limited | Real estate | 2025 |
| HHB Agency Limited | Information & communication | 2005 |
| Historic Aircraft Collection Ltd | Other services | 1998 |
| Hive Ventures Ltd | Information & communication | 2024 |
| HJR Services Ltd | Manufacturing | 2022 |
| Holi Architecture Limited | Professional & scientific | 2023 |
| Holland House Livery Limited | Agriculture & fishing | 2026 |
| Holmesdale Court Limited | Real estate | 2003 |
| Holmesdale Court Residents Association Limited | Real estate | 1987 |
| Homeogriff Ltd | Education | 2024 |
| Homewood Holdings Limited | Financial services | 2019 |
| Horizons Training Limited | Education | 2012 |