| First Line Healthcare Ltd | Health & social care | 2019 |
| First Logistic Group Limited | Wholesale & retail | 2019 |
| Fitglö Ltd | Wholesale & retail | 2016 |
| Fitzberg Ltd | Administrative & support | 2016 |
| Fitzgerald Utilities Ltd | Construction | 2025 |
| Five Marina (South East) Limited | Hospitality | 2025 |
| Fiveash Property Ltd | Construction | 2022 |
| Flamingo Park Limited | Arts & recreation | 2000 |
| Flavours of India (Hastings) Limited | Hospitality | 2002 |
| Fletcher Plastering Contractors Ltd | Construction | 2023 |
| Flintstone Epics Ltd | Information & communication | 2015 |
| Flockhere Limited | Information & communication | 2022 |
| Floozbox Limited | Extraterritorial | 2012 |
| Flux.Am Ltd | Information & communication | 2016 |
| Fluxon Ltd | Administrative & support | 2025 |
| Fontridge Manor Farm Limited | Agriculture & fishing | 1980 |
| Fontridge Pharmaceutical Research and Development Limited | Manufacturing | 2000 |
| Food Fusion Ltd | Hospitality | 2026 |
| FOR the Love of PLY Ltd | Manufacturing | 2020 |
| Forage Coffee Ltd | Hospitality | 2024 |
| Forgotten Lands Music Ltd | Arts & recreation | 2018 |
| Fourbuoys LLP | | 2025 |
| Fowle & Co Limited | Wholesale & retail | 1970 |
| FOX Tuck Property Consultants Ltd | Professional & scientific | 2018 |
| Foxdown Construction Group Limited | Financial services | 2025 |
| Foxdown Construction Limited | Construction | 1999 |
| Foxdown Plant Limited | Administrative & support | 2025 |
| Foxdown Property Assets Limited | Real estate | 2026 |
| Foxhole Commercial Limited | Real estate | 2016 |
| Foxhole SLA Limited | Real estate | 2011 |
| Frances Mapstone Consulting Ltd | Professional & scientific | 2011 |
| Frankis Management Ltd. | Information & communication | 2018 |
| Frankonia Eastbourne Ltd | Hospitality | 2022 |
| Frankonia Hastings Limited | Hospitality | 2022 |
| Frankonia Holdings Limited | Manufacturing | 2022 |
| Fred & Cressida Limited | Professional & scientific | 2015 |
| FREE3DEE Limited | Arts & recreation | 2013 |
| Freelygive Limited | Information & communication | 2014 |
| Freeman Headcovers Ltd | Manufacturing | 2025 |
| Freewheel Driving School Ltd | Education | 2023 |
| Freeze Dried Candy Ltd | Wholesale & retail | 2024 |
| French Truffle Tree Limited | Agriculture & fishing | 2018 |
| Fresh Financial Services Limited | Financial services | 2018 |
| Freshfs BTL Limited | Real estate | 2022 |
| Freshwinds Camping Limited | Hospitality | 2011 |
| Front Page Group Limited | Real estate | 2011 |
| Front ROW Learning Ltd | Professional & scientific | 2018 |
| Frosty Moose Limited | Administrative & support | 2008 |
| Funkyrox Limited | Wholesale & retail | 2014 |
| Funnell & Perring Ltd | Professional & scientific | 2019 |
| Funnell Marketing Ltd | Information & communication | 2019 |
| Fusion Assets (South East) Limited | Administrative & support | 2024 |
| Future Generation Education Services Limited | Arts & recreation | 2002 |
| Futurebright Solutions Limited | Professional & scientific | 2019 |
| Futurisma Ltd | Administrative & support | 2018 |
| G & a Roofing Limited | Construction | 2002 |
| G & JC Restaurants Limited | Professional & scientific | 2006 |
| G & T Associates LLP | | 2009 |
| G E Laitwell LLP | | 2020 |
| G M Monk Holdings Limited | Financial services | 2023 |
| G M Monk Limited | Construction | 1995 |
| G M Monk Renewables Limited | Construction | 2023 |
| G Markwick Ltd | Construction | 2011 |
| G W Grab Hire Ltd | Other services | 2017 |
| G.L.A.C.E Limited | Real estate | 2025 |
| Gaffney Roofing Ltd | Construction | 2002 |
| Gaia GUY Limited | Wholesale & retail | 2024 |
| Gaimster Bespoke Interiors Ltd | Manufacturing | 2025 |
| Gallery 53 (Hastings) Limited | Wholesale & retail | 2021 |
| Gallery 53 Holiday Rentals Limited | Hospitality | 2023 |
| Gallops Equipment Manufacturers Limited | Manufacturing | 2010 |
| Gamble Property Services Ltd | Construction | 2018 |
| GAR Procurement Services Limited | Professional & scientific | 2019 |
| Garidorous Limited | Real estate | 2019 |
| Gary Neill Limited | Arts & recreation | 2003 |
| Gary Saunters Crane Services Ltd | Manufacturing | 2014 |
| GATE4U Ltd | Construction | 2014 |
| GB Carpentry (Sussex) Limited | Construction | 2019 |
| GB Hastings Kids Limited | Education | 2019 |
| Gcmt Holding Ltd | Extraterritorial | 2025 |
| Gelding Property Limited | Real estate | 2024 |
| GEM Auto Specialised Services Limited | Wholesale & retail | 2018 |
| Gemma Pawson Early Years Consultant Ltd | Education | 2025 |
| Genbatt Limited | Manufacturing | 2023 |
| Gencoogullari Ltd | Hospitality | 2019 |
| Genesis Accounts Ltd | Information & communication | 2025 |
| Genifix Ltd | Wholesale & retail | 2026 |
| Gensing Manor Limited | Construction | 2023 |
| Gensing RTM Company Limited | Households | 2010 |
| Genti's Car Wash Ltd | Administrative & support | 2026 |
| Geoffrey Sapsford Limited | Other services | 2007 |
| George Henry Limited | Administrative & support | 2025 |
| George Marshall Ltd | Professional & scientific | 2021 |
| GET Money in UN Limited | Financial services | 2023 |
| GET on With Business Limited | Other services | 2010 |
| GET Your Glad Rags on Ltd | Wholesale & retail | 2024 |
| GHK Chocolate Ltd | Manufacturing | 2020 |
| Ghyl Lebentz Ltd | Professional & scientific | 2012 |
| Gibbon Brooks Limited | Professional & scientific | 2020 |
| Gibson Properties & Development Ltd | Real estate | 2023 |