| Flightway Business Park Management Company Limited | Real estate | 1999 |
| Flip Investments Ltd | Financial services | 2025 |
| Fliq Dating Limited | Information & communication | 2026 |
| Fljj Ltd | Professional & scientific | 2021 |
| Floor - World Limited | Construction | 2005 |
| Florey Partners Limited | Professional & scientific | 2010 |
| Floreyconsulting Ltd | Professional & scientific | 2024 |
| Flourishing Rose Ltd | Wholesale & retail | 2024 |
| FLOW25 Ltd | Water & waste | 2024 |
| Flower Property Holdings Ltd | Real estate | 2024 |
| Flowes Fintech Limited | Other services | 2023 |
| Flowes Resources Limited | Information & communication | 2026 |
| Flowside Limited | Information & communication | 2025 |
| FLY Away Ballooning Ltd | Administrative & support | 2020 |
| FLY Software Ltd | Information & communication | 2008 |
| Flying Geese Limited | Manufacturing | 2023 |
| Fmaesthetics (Training) Limited | Other services | 2024 |
| Fmaesthetics Ltd | Other services | 2021 |
| Fmet 2025 Ltd | Hospitality | 2025 |
| FMG Garden Centre Ltd | Other services | 2026 |
| FMS Schools Movement Limited | Education | 2023 |
| Focus (HS) Limited | Professional & scientific | 2014 |
| Focus Litigation Support Ltd | Professional & scientific | 2009 |
| Focused Equine Ltd | Professional & scientific | 2024 |
| Fogginstone Ltd | Health & social care | 2026 |
| Folded Wave Limited | Information & communication | 2011 |
| Fone Care and Repair Ltd | Wholesale & retail | 2022 |
| Fone Mania Ltd | Wholesale & retail | 2019 |
| Food Line Wholesale Ltd | Wholesale & retail | 2016 |
| Food Matters International Limited | Professional & scientific | 2019 |
| Footbalance System UK Limited | Manufacturing | 2012 |
| Football Factory International Limited | Wholesale & retail | 2017 |
| Football FUN Factory (Community 081) Limited | Arts & recreation | 2022 |
| FOR ALL Surveys LLP | | 2018 |
| Forbes-Haley Ltd | Professional & scientific | 2020 |
| Ford Bros Properties Ltd | Administrative & support | 2024 |
| Ford Nursery Limited Liability Partnership | | 2025 |
| Fore Hair Limited | Other services | 2025 |
| Forebridge UK Ltd | Financial services | 2025 |
| Forest Fungi Ltd | Agriculture & fishing | 2013 |
| Forest Mill Builders Limited | Construction | 2019 |
| Forever Florist International Limited | Wholesale & retail | 2006 |
| Forgecraft Ltd | Manufacturing | 2016 |
| Forgham Properties Ltd | Real estate | 2025 |
| Formula T&T Limited | Wholesale & retail | 2006 |
| Fortiss Limited | Wholesale & retail | 2012 |
| Fortlox Moto Ltd | Wholesale & retail | 2025 |
| Fortress Feet Limited | Professional & scientific | 2023 |
| Fortuna Exeter Limited | Health & social care | 2025 |
| Forty Five Creative Limited | Information & communication | 2010 |
| Forum 1953 Limited | Real estate | 2016 |
| Forward Business Management Services Ltd | Professional & scientific | 2025 |
| Forward Mortgages Limited | Administrative & support | 2021 |
| Forward Support Care Ltd | Health & social care | 2019 |
| Forwardly Thinking Ltd | Professional & scientific | 2026 |
| Fosg Ltd | Financial services | 2025 |
| Foster Construction (SW) Limited | Construction | 2008 |
| Foster Properties Ltd | Households | 2024 |
| Foster-Ward Trading Limited | Real estate | 2019 |
| Four Crosses Properties Limited | Real estate | 2016 |
| Four LEE Brothers Ltd | Hospitality | 2020 |
| Four Seasons Conveyancing Ltd | Professional & scientific | 2024 |
| Fourforks Holdings Limited | Real estate | 2020 |
| Fowey Consulting Limited | Professional & scientific | 2017 |
| FOX & Goose Limited | Financial services | 2012 |
| Fox's Grange Management Company Limited | Households | 2016 |
| Fox's Seat Ltd | Financial services | 2024 |
| Foxleigh Property Ltd | Real estate | 2025 |
| Foxrock Developments Limited | Construction | 2003 |
| Foxstone Construction (South West) Ltd | Construction | 2023 |
| Foxstone Developments (South West) Ltd | Real estate | 2024 |
| FOXY3DPRINTS Ltd | Manufacturing | 2025 |
| FP Trading Limited | Wholesale & retail | 2008 |
| Frabula Ltd | Health & social care | 2025 |
| Fraccano LLP | | 2010 |
| Fraeser Investments Ltd | Professional & scientific | 2005 |
| Framps Ltd | Real estate | 2026 |
| Framptons of Bridport Limited | Wholesale & retail | 2005 |
| Francis Online Retail Ltd | Wholesale & retail | 2023 |
| Francisco Limited | Construction | 2010 |
| Franian Estates Limited | Real estate | 2003 |
| Frank Clarke and Sons Limited | Agriculture & fishing | 2001 |
| Frans Gardening and Landscaping Limited | Administrative & support | 2017 |
| FRE an Limited | Hospitality | 2024 |
| Fredrod Ltd | Professional & scientific | 2024 |
| Free to Lead Consulting Limited | Professional & scientific | 2015 |
| Freecoffee Ltd | Wholesale & retail | 2026 |
| Freehamlet Medical Limited | Health & social care | 2016 |
| Freight & Repair Service (Taunton) Limited | Agriculture & fishing | 1975 |
| Freight Software Group Limited | Financial services | 2014 |
| French Weir Affordable Homes LLP | | 2012 |
| French Weir Properties Ltd | Real estate | 2004 |
| Frensham Vale Management Company Limited | Households | 2026 |
| Fresco Catering Ltd | Hospitality | 2023 |
| Freshford Consulting Limited | Health & social care | 2023 |
| Freshford Park Management Company Limited | Households | 2005 |
| Friendly Lama Limited | Hospitality | 2020 |
| Friends Mobile Solutions Ltd | Wholesale & retail | 2019 |
| Friends Travel Solutions Ltd | Transport & logistics | 2023 |
| Friends Ventures Ltd | Real estate | 2024 |