| Frameworks Windows and Doors Ltd | Manufacturing | 2025 |
| Framnaes Freehold Limited | Real estate | 2016 |
| Frampton Technical Project Solutions Limited | Information & communication | 2008 |
| Frances Scott Ltd | Real estate | 2023 |
| Francesc Properties Ltd | Real estate | 2024 |
| Francesca Allen Design Limited | Professional & scientific | 2018 |
| Francesca Cook Design Limited | Arts & recreation | 2017 |
| Francis Wilson Estates Limited | Financial services | 2026 |
| Frank Ogden (Butchers) Limited | Real estate | 1941 |
| Frankleigh Ltd | Arts & recreation | 2015 |
| Franridge Properties Limited | Real estate | 2015 |
| Fraser Grace Ltd | Administrative & support | 2013 |
| Frateli 08 Ltd | Hospitality | 2025 |
| Freckled Angels Limited | Information & communication | 2023 |
| Freckled Angels Live Limited | Arts & recreation | 2025 |
| Fred's Trading Co Ltd. | Wholesale & retail | 2022 |
| Free Haus Limited | Hospitality | 2019 |
| Freedom Aesthetics Limited | Health & social care | 2017 |
| Freedom Realty Ltd | Hospitality | 2022 |
| Freedom Works Management Ltd | Real estate | 2025 |
| Freeland House (Eastbourne) Residents Association Limited (the) | Households | 1980 |
| Freespirit Agency Limited | Wholesale & retail | 2019 |
| French Toast Home Décor Ltd | Wholesale & retail | 2017 |
| Fresca Pasta Limited | Hospitality | 2026 |
| Fresh FIX Cleaning Solutions Ltd | Administrative & support | 2025 |
| Fresh Forward Ltd | Professional & scientific | 2011 |
| Fresh Pick Ltd | Wholesale & retail | 2018 |
| Freya Blom Ltd | Administrative & support | 2013 |
| Freya Rose Tanner Ltd | Professional & scientific | 2021 |
| Friars Walk 'B' (Lewes) Management Company Limited | Households | 1991 |
| Friars Walk (Lewes) a Management Company Limited | Households | 1990 |
| Friedrich Holdings Limited | Real estate | 2021 |
| Friend of a Friend Photography LLP | | 2020 |
| Friendly FOX Design Ltd | Information & communication | 2020 |
| Friends of Baphumelele Limited | Education | 2012 |
| Friends of Hove Lagoon CIC | Arts & recreation | 2025 |
| Fringetastic Hair Ltd | Other services | 2019 |
| From Yaya Ltd | Wholesale & retail | 2023 |
| Frozen Items Ltd | Wholesale & retail | 2023 |
| Frozen North Capital Limited | Real estate | 2020 |
| Fryzer Property Services Limited | Real estate | 2008 |
| FSP Borderline Limited | Information & communication | 2023 |
| Fsuk International College Ltd | Education | 2024 |
| FT Asia Ltd | Hospitality | 2006 |
| Fuel Health Ltd | Professional & scientific | 2015 |
| Full Boar Sports Ltd | Health & social care | 2020 |
| Full Circle Consulting (UK) Limited | Administrative & support | 2010 |
| Full Disclosure Research & Analysis Ltd | Financial services | 2014 |
| Functional Skills UK Limited | Education | 2014 |
| Funday Studios Limited | Information & communication | 2017 |
| Fung Shui Group Limited | Wholesale & retail | 2025 |
| Funglejunk Ltd | Information & communication | 2007 |
| Funkfit UK Limited | Arts & recreation | 2017 |
| Funkwell Games Ltd | Information & communication | 2024 |
| Funny B Ltd | Professional & scientific | 2023 |
| Furdrobe Ltd | Wholesale & retail | 2021 |
| Furnewal Ltd | Manufacturing | 2013 |
| Further South Productions Limited | Information & communication | 2019 |
| Furzedene Residents Management Company Ltd. | Households | 2011 |
| Fusilli Films Ltd | Information & communication | 2023 |
| Fusion Property Solutions Limited | Real estate | 2021 |
| Fusseylogic Ltd | Professional & scientific | 2023 |
| Future Earth Systems (Europe) Limited | Information & communication | 2011 |
| Future Investments Gate (FIG) Ltd | Professional & scientific | 2020 |
| Future Planet Limited | Other services | 2018 |
| Future Roofing Ltd Ltd | Construction | 2025 |
| Futureteams International Ltd | Administrative & support | 2022 |
| Futuro FB Ltd | Transport & logistics | 2025 |
| Fuze Software Limited | Wholesale & retail | 2023 |
| FX Cauldron Ltd | Information & communication | 2025 |
| FZ Dental Limited | Health & social care | 2025 |
| G & a Consulting (Sussex) Ltd | Professional & scientific | 2011 |
| G & J Tax and Accounting Services Ltd | Professional & scientific | 2011 |
| G & M (Hove) Ltd | Wholesale & retail | 2009 |
| G & S Clearance Limited | Water & waste | 2017 |
| G Boarer Consultancy Ltd | Other services | 2017 |
| G J King (Sayers Common) Limited | Real estate | 1999 |
| G J Wood Builders Limited | Construction | 2011 |
| G K F Plumbing & Building Services Limited | Construction | 1998 |
| G M Events Ltd | Arts & recreation | 2010 |
| G&A Cleaning Services (Sussex) Limited | Administrative & support | 2024 |
| G&S (Sussex) Investments Ltd | Construction | 2024 |
| G. C. Fire & Security Ltd | Construction | 2010 |
| G. Chandler Farming Ltd | Agriculture & fishing | 2012 |
| G.E.S.P Ltd | Wholesale & retail | 2024 |
| G.K. International (Import & Export) Limited | Transport & logistics | 2017 |
| Gaam Ibiza Ltd | Real estate | 2025 |
| Gabrys Szeremeta Ltd | Arts & recreation | 2026 |
| Gaffneys Waste Disposal Ltd | Water & waste | 2003 |
| Gaia Floristry Hove Ltd | Wholesale & retail | 2025 |
| Galahad Holdings Ltd | Financial services | 2026 |
| Galecrest Consultancy Limited | Financial services | 2011 |
| Gallagher Consultancy Ltd | Professional & scientific | 2024 |
| GAM Hove Limited | Households | 2004 |
| Games Network Ltd | Wholesale & retail | 2023 |
| Gamich LLP | | 2006 |
| Gamoid Ltd | Information & communication | 2026 |
| Ganas Technology Ltd | Information & communication | 2014 |
| Gander & Stevens Carpentry Contractors Limited | Construction | 2004 |
| Gannet House (Hove) Limited | Households | 1982 |