| Exotic Dried Food Limited | Wholesale & retail | 2025 |
| Exous Holdings Limited | Financial services | 2024 |
| Expat Habitat Ltd | Hospitality | 2026 |
| Expat UK Tax Ltd | Professional & scientific | 2025 |
| Expert Medical Care Ltd | Health & social care | 2023 |
| Expert Virtual Assistant Services Ltd | Administrative & support | 2017 |
| Explore History Ltd | Education | 2015 |
| Express Liquid Screeds Limited | Manufacturing | 2013 |
| Express Ventilation Sussex Ltd | Construction | 2023 |
| Exterior Creations Limited | Administrative & support | 2022 |
| External Tank Limited | Financial services | 2019 |
| Extraordinary Entrepreneur Ltd | Other services | 2025 |
| Extreme Tyres Limited | Wholesale & retail | 2014 |
| F&M Collection Ltd | Wholesale & retail | 2025 |
| F.A. Watts & Sons (Shoemakers) Limited | Real estate | 1944 |
| F.G.C Electrical Services Ltd | Construction | 2024 |
| F.W. Longhurst & SON Limited | Agriculture & fishing | 1966 |
| F/64 Ltd | Professional & scientific | 2007 |
| F6 Racing Limited | Professional & scientific | 2025 |
| FAB Chicks Private Limited | Hospitality | 2025 |
| FAB Fish Ltd | Hospitality | 2025 |
| FAB Parents Limited | Education | 2015 |
| Fabfunky Ltd | Wholesale & retail | 2013 |
| Fabliaux Ltd | Manufacturing | 2004 |
| Fabrizio Placidi Ltd | Construction | 2024 |
| Faceless Marketing House Limited | Professional & scientific | 2026 |
| Faceplant Cutting Studios Ltd | Other services | 2025 |
| Facilities & Maintenance Contractors (FMC) Ltd | Real estate | 2011 |
| FACILITIES32FORTY Ltd | Construction | 2017 |
| Faction Interiors Ltd | Construction | 2025 |
| Factorhurry Limited | Real estate | 1988 |
| Faidiga UK Group Limited | Transport & logistics | 2018 |
| Fail Forward (Sussex) Ltd | Wholesale & retail | 2020 |
| Fainted Ltd | Information & communication | 2020 |
| Fair Venture Consulting Limited | Professional & scientific | 2004 |
| Fairfield Golden Cross Limited | Financial services | 2024 |
| Fairfield Golden Cross Management Company Ltd | Households | 2026 |
| Fairlight Management Company (Worthing) Limited | Real estate | 2009 |
| Fairwood Take Away Ltd | Hospitality | 2023 |
| Faith Eco Solutions Limited | Construction | 2022 |
| Faith Property Solutions Ltd | Construction | 2023 |
| FAJ Communication Ltd | Wholesale & retail | 2020 |
| Fakejake Ltd | Manufacturing | 2019 |
| Falling Angel Productions Limited | Arts & recreation | 2016 |
| Fallout Holdings Ltd | Real estate | 2019 |
| Family Assets Management Limited | Households | 2010 |
| Family Bond Health Care Limited | Health & social care | 2022 |
| Family Healthcare Ltd | Wholesale & retail | 2021 |
| Family Tree (Holdings) Limited | Financial services | 2023 |
| Fanciful Holdings Ltd | Real estate | 2021 |
| Fandobbydozy LLP | | 2020 |
| Faraon AI Ltd | Professional & scientific | 2019 |
| Farmgate Developments Ltd | Real estate | 2025 |
| Farras Engineering Consultancy Ltd | Professional & scientific | 2013 |
| Farrow Building Services Limited | Construction | 2017 |
| Fast Business Association Limited | Professional & scientific | 2002 |
| Fast Driverz Ltd | Transport & logistics | 2020 |
| Fast Fixings Direct Ltd | Wholesale & retail | 2024 |
| Fateless Ltd | Information & communication | 2023 |
| Faustian Follies Limited | Professional & scientific | 2024 |
| Faversham Solutions Ltd | Administrative & support | 2024 |
| Favourite Pizza Worthing Ltd | Hospitality | 2023 |
| Faye Nicole Rose Limited | Health & social care | 2021 |
| Fayrlight Solutions Ltd | Information & communication | 2009 |
| Faze IT Limited | Information & communication | 2003 |
| Fazua UK Ltd | Wholesale & retail | 2022 |
| FB2 Consulting Limited | Information & communication | 2013 |
| FBA Books Ltd | Extraterritorial | 2010 |
| FBE Sussex Ltd | Real estate | 2019 |
| Fconsulting Ltd | Information & communication | 2015 |
| FCT Installations Ltd | Construction | 2026 |
| FD Music Ltd | Information & communication | 2022 |
| FDM Design Limited | Professional & scientific | 2010 |
| Feast in Worthing Ltd | Hospitality | 2025 |
| Feast of Worthing Limited | Hospitality | 2019 |
| Feather & Bucket Ltd | Administrative & support | 2024 |
| Feature Physiotherapy Ltd | Other services | 2024 |
| Feel Inspired Limited | Administrative & support | 1999 |
| Felix and Friends Limited | Professional & scientific | 2011 |
| Felix Vulpes Ltd | Financial services | 2022 |
| Felpham George Inn Limited | Hospitality | 2007 |
| Fenton I.T Limited | Information & communication | 2007 |
| Fermionx Ltd | Manufacturing | 1992 |
| Fernandos Express Ltd | Hospitality | 2017 |
| Ferndale Healthcare Limited | Health & social care | 1994 |
| Ferndale House Group Limited | Financial services | 2026 |
| Ferndale House School Ltd | Education | 2026 |
| Fernhurst Court Management Company Limited | Households | 1960 |
| Ferring Carpets & Interiors Limited | Wholesale & retail | 1994 |
| Ferring Country Centre Limited | Agriculture & fishing | 1986 |
| Ferring Electrical Services Limited | Energy | 2017 |
| Ferring Foot Clinic. Podiatry & Chiropody Ltd | Health & social care | 2013 |
| Ferring Investments Limited | Financial services | 2024 |
| Ferring News Ltd | Wholesale & retail | 2016 |
| Ferring Spice Limited | Hospitality | 2022 |
| Ferring Sushi Ltd | Hospitality | 2019 |
| Ferryspeed Limited | Professional & scientific | 2005 |
| FFK Associates Ltd | Administrative & support | 2023 |
| FHC Fashion Company Limited | Financial services | 2015 |
| FHL Europe Limited | Real estate | 2024 |