| FAB Space Ltd | Real estate | 2024 |
| Fabric Architecture Holdings Limited | Financial services | 2009 |
| Fairlight (Swansea) Limited | Real estate | 2007 |
| Family Tree Funeral Company Limited | Other services | 2020 |
| Farenga Limited | Professional & scientific | 2011 |
| Fashion Nails & Spa Limited | Other services | 2025 |
| FASHION2FASHION Limited | Professional & scientific | 2010 |
| Fatu Limited | Information & communication | 2024 |
| Fawkes Systems Ltd | Professional & scientific | 2024 |
| FE Creative Limited | Professional & scientific | 2014 |
| Feducia Ltd | Professional & scientific | 2023 |
| Feed Your Elephant Limited | Information & communication | 2018 |
| Feeding Change 2 CIC | Hospitality | 2021 |
| FEN Farm Solar Park Limited | Energy | 2007 |
| FEN Farm Wind Park Limited | Energy | 2005 |
| Ferns Natural Capital Strategy Ltd | Professional & scientific | 2023 |
| Fernside Solutions Limited | Information & communication | 2005 |
| FFC Services Limited | Wholesale & retail | 2014 |
| FGR Community | Other services | 2018 |
| Field House Gardens Stroud Management Limited | Real estate | 2005 |
| Fielder Marine Services (UK) Limited | Agriculture & fishing | 2021 |
| Fieldhouse Trading Ltd | Professional & scientific | 2017 |
| Fieldview Studio Ltd | Professional & scientific | 2026 |
| Fifty Seven Oakfield Road Management Limited | Households | 1993 |
| Fillingham Associates Limited | Real estate | 1999 |
| Fillingham Interiors Limited | Professional & scientific | 2012 |
| Finalfinish Ltd | Construction | 2024 |
| Finamics Limited | Information & communication | 2014 |
| Finlay Thompson LLP | | 2012 |
| First Flights Media Limited | Arts & recreation | 2019 |
| Fit Solar Ltd | Construction | 2022 |
| Five Black Stripes Ltd. | Professional & scientific | 2025 |
| Five From the Fire Limited | Information & communication | 2026 |
| Five From the Fire Podcasts Limited | Information & communication | 2026 |
| Five Valley Tech Limited | Information & communication | 2016 |
| Five Valleys Arbor Ltd | Administrative & support | 2026 |
| Five Valleys Automotive Ltd | Wholesale & retail | 2022 |
| Five Valleys Collective Ltd | Administrative & support | 2026 |
| Five Valleys Counselling Practice Ltd | Health & social care | 2014 |
| Five Valleys Ecology Ltd | Professional & scientific | 2011 |
| Five Valleys Models Ltd | Wholesale & retail | 2015 |
| Five Valleys Recovery C.I.C. | Hospitality | 2023 |
| Five Valleys Rendering Limited | Extraterritorial | 2024 |
| Five Valleys Roof Clean Ltd | Administrative & support | 2025 |
| FIX and Weld Limited | Administrative & support | 2003 |
| Flatluxury Limited | Real estate | 1995 |
| Fleet Action Sports Limited | Wholesale & retail | 2017 |
| Fleet Return Limited | Extraterritorial | 2015 |
| Fleur Fairfax Ltd | Manufacturing | 2019 |
| Flexi Hub Education Ltd | Education | 2025 |
| Flint Writes Limited | Arts & recreation | 2015 |
| Flipping Fantastic Furniture Ltd | Wholesale & retail | 2026 |
| Flock and Dazzle Limited | Wholesale & retail | 2020 |
| FM1 Limited | Hospitality | 2021 |
| FM92 Consulting Limited | Information & communication | 2022 |
| Fone Hub Gloucester Ltd | Wholesale & retail | 2022 |
| Fone Tech Ltd | Wholesale & retail | 2024 |
| Fones Doctorz Ltd | Wholesale & retail | 2020 |
| FOR2FEET Limited | Education | 2013 |
| Forces for Change Limited | Transport & logistics | 2004 |
| Forest Green Kitchen Limited | Manufacturing | 2018 |
| Forest Green Rovers Football Club Limited | Arts & recreation | 2008 |
| Forest Green Sun Company Limited | Administrative & support | 2014 |
| Forester (Dukinfield) Ltd | Hospitality | 2021 |
| Forethought Integrated Services Ltd | Transport & logistics | 2025 |
| Forgiveness Limited | Information & communication | 2015 |
| Fortress Gym Ltd | Arts & recreation | 2023 |
| Fortune Chinese 168 Limited | Hospitality | 2025 |
| Forum Shelf Co. 27 Limited | Real estate | 1989 |
| Fosse Specialist Roofing Limited | Construction | 2014 |
| Foundations Cotswolds Limited | Construction | 2014 |
| Four Beards Ltd | Professional & scientific | 2022 |
| Fourfold Living Arts CIC | Administrative & support | 2022 |
| Fourpoint Mapping Limited | Professional & scientific | 2017 |
| Fourth Sight Ltd | Professional & scientific | 2022 |
| Fourways Garage (Chalford) Limited | Wholesale & retail | 1996 |
| Foxbuild Develoments Limited | Construction | 2019 |
| Foxley Properties Ltd | Real estate | 2023 |
| Frampton Youth Football Club | Arts & recreation | 2019 |
| France Congregational Management Company Limited | Households | 1999 |
| Frank & Brown Limited | Professional & scientific | 2006 |
| Fred Clark Studio Ltd | Arts & recreation | 2025 |
| Fred Stevens Limited | Other services | 1993 |
| Freddie Bear Land Management Ltd | Agriculture & fishing | 2020 |
| Freedom Financials: Accountancy & Bookkeeping Ltd | Professional & scientific | 2021 |
| Freedom Property Ventures Limited | Real estate | 2016 |
| Freedom RV & Leisure Ltd | Wholesale & retail | 2018 |
| Freight Arranger Limited | Transport & logistics | 2011 |
| Fresh Air Productions Limited | Arts & recreation | 2026 |
| Freya Mcfarlane Ltd | Other services | 2024 |
| Frida Bowie Limited | Real estate | 2024 |
| Friends of Stratford Park Lido | Education | 2024 |
| From SAM to YOU Ltd | Hospitality | 2026 |
| Frondia Ltd | Professional & scientific | 2025 |
| Front Rack Ltd | Manufacturing | 2025 |
| Frustration House RTM Company Ltd | Real estate | 2021 |
| Fuel Coffee Limited | Hospitality | 2019 |
| Funky Falafel Ltd | Hospitality | 2019 |
| Funkymunky Music Ltd | Arts & recreation | 2026 |
| FUR and Claws Ltd | Manufacturing | 2025 |