| Female Boss Collective Ltd | Professional & scientific | 2022 |
| Femalera Ltd | Wholesale & retail | 2025 |
| Femax Pipework Services Ltd | Construction | 2011 |
| Femex Holdings UK Ltd | Financial services | 2025 |
| Femhoc Limited | Transport & logistics | 2024 |
| Feminine Allure Limited | Wholesale & retail | 2026 |
| Femsurg Ltd | Health & social care | 2021 |
| Femtofotonics Ltd | Professional & scientific | 2014 |
| Femworth Properties Ltd | Real estate | 2022 |
| Fence 2 Fence Ltd | Administrative & support | 2026 |
| Fencing Supplies Direct Ltd | Wholesale & retail | 2020 |
| Fenco Limited | Administrative & support | 2018 |
| Fenderup Limited | Wholesale & retail | 2024 |
| Feng Group Limited | Wholesale & retail | 2018 |
| Fengate Commercial Services Limited | Transport & logistics | 1992 |
| Fengming Ltd | Hospitality | 2025 |
| Fenice Investments Ltd | Real estate | 2019 |
| Fenice Management Limited | Real estate | 2021 |
| Fenice Media Ltd | Professional & scientific | 2011 |
| Fenice Media Services Ltd | Professional & scientific | 2015 |
| Fenix Security Services Limited | Public administration | 2010 |
| Fenky Jane's Ltd | Manufacturing | 2010 |
| Fenlands Sheepskin Co Ltd | Wholesale & retail | 2012 |
| Fenley Organic Harmony Blend Limited | Manufacturing | 2024 |
| Fenous Grill Limited | Hospitality | 2023 |
| Fenres Limited | Real estate | 2019 |
| Fentham Stores Ltd | Wholesale & retail | 2026 |
| Fenton CCB Ltd | Professional & scientific | 2025 |
| Fenton Lane Energy Limited | Energy | 2017 |
| Fenwick Bathrooms Ltd | Construction | 2025 |
| Fenwick Plumbing & Water Treatments Ltd | Construction | 2025 |
| Fenya Limited | Wholesale & retail | 2025 |
| Fer-Co Constructions Limited | Construction | 2019 |
| Fera Services Limited | Administrative & support | 2020 |
| Ferayt Ltd | Wholesale & retail | 2025 |
| Ferchill Services Ltd | Wholesale & retail | 2022 |
| Ferdine Ltd | Wholesale & retail | 2021 |
| Ferenji Limited | Health & social care | 2018 |
| Ferguson Lettings Ltd | Real estate | 2024 |
| Ferguson Studios Ltd | Information & communication | 2023 |
| Feriwala UK Ltd | Wholesale & retail | 2024 |
| Ferlance Ltd | Public administration | 2021 |
| Fermoy Plant Ltd | Administrative & support | 2024 |
| Fern Acre Limited | Agriculture & fishing | 2023 |
| Fern Education and Training Limited | Education | 2020 |
| Fern Green (Holdings) Ltd | Financial services | 2019 |
| Fern N Furl Ltd | Wholesale & retail | 2021 |
| Fernando Fashion Ltd | Wholesale & retail | 2019 |
| Fernando Investments Limited | Real estate | 2023 |
| Fernando Motors Accident Repairs and Claims Management Birmingham Ltd | Wholesale & retail | 2024 |
| Fernando Motors Birmingham Ltd | Wholesale & retail | 2024 |
| Fernando Oncology Services Limited | Health & social care | 2013 |
| Fernando Traders Ltd | Wholesale & retail | 2025 |
| Fernandostopstore Ltd | Wholesale & retail | 2021 |
| Fernbaron Limited | Professional & scientific | 2019 |
| Fernhurst Design Limited | Professional & scientific | 2021 |
| Fernley Jones Group Limited | Professional & scientific | 2024 |
| Fernley Jones Limited | Professional & scientific | 2016 |
| Fernside Gardens RTM Company Limited | Real estate | 2013 |
| Fernweh Partners Ltd | Professional & scientific | 2022 |
| Fernwood House Ltd | Information & communication | 2022 |
| Fernwood Place (Littleover) Management Company Limited | Households | 2007 |
| Fernwood Publishing House (ENG) Ltd | Wholesale & retail | 2023 |
| Ferraris Piston Service Limited | Wholesale & retail | 2001 |
| Ferro Additive Compound Technology (Fact) Ltd | Professional & scientific | 2006 |
| Ferro DUO UK Ltd. | Manufacturing | 2019 |
| Ferroal Limited | Real estate | 2020 |
| Ferrotex LP | | 2017 |
| Ferwell Developments Ltd. | Real estate | 2024 |
| Fesalholdings Limited | Professional & scientific | 2016 |
| Fessa Projects Limited | Education | 1995 |
| Fest 1 Limited | Hospitality | 2017 |
| Festen Ltd | Hospitality | 2020 |
| Festen Property Ltd | Real estate | 2026 |
| Festival Arts (UK) Limited | Arts & recreation | 2005 |
| Festival Markets Ltd | Wholesale & retail | 2022 |
| Festival of Faith Ltd | Professional & scientific | 2024 |
| Fetch My Quote Limited | Information & communication | 2019 |
| Fetcher Dog | Other services | 2018 |
| Fetchery Ltd | Administrative & support | 2025 |
| Fetchevery Limited | Information & communication | 2024 |
| Fetich Limited | Wholesale & retail | 2023 |
| Fetlet Services Ltd | Administrative & support | 2023 |
| Feverdream Records Ltd | Information & communication | 2025 |
| FEZ55 Properties Ltd | Real estate | 2026 |
| Fezstaevent CIC | Hospitality | 2020 |
| Fezzan for Geophysical Services Ltd | Mining & quarrying | 2023 |
| Fezzy Uthmani Photography Ltd | Professional & scientific | 2024 |
| FF Furbnow Limited | Professional & scientific | 2022 |
| FF Midlands Limited | Hospitality | 2025 |
| FF UK Logistics Ltd | Transport & logistics | 2022 |
| FFC Birmingham Limited | Manufacturing | 2007 |
| FFC Cinderford Limited | Hospitality | 2024 |
| FFD Enterprise Ltd | Wholesale & retail | 2025 |
| Fffound Limited | Wholesale & retail | 2025 |
| Ffih Limited | Financial services | 2020 |
| Ffion Spa Ltd | Wholesale & retail | 2020 |
| Ffiric Limited | Professional & scientific | 2014 |
| FFR Electrical Services Limited | Manufacturing | 2018 |
| Ffrith Beach Touring Park Limited | Wholesale & retail | 2010 |