| Flexers Ltd | Wholesale & retail | 2019 |
| Flexibility.Co.Uk Ltd | Information & communication | 2008 |
| Flexible Directors Limited | Professional & scientific | 1994 |
| Flexifd 10 Ltd | Administrative & support | 2010 |
| Flexinnova Market Limited | Wholesale & retail | 2024 |
| Flexipump Ltd | Manufacturing | 2003 |
| Flexmount Development Ltd | Construction | 2021 |
| Flexpatio Ltd | Manufacturing | 2026 |
| Flextee Ltd | Administrative & support | 2026 |
| Fliegen Dog Ltd | Wholesale & retail | 2024 |
| Flight Mode Innovation Limited | Financial services | 2025 |
| Flight School Expert Limited | Information & communication | 2025 |
| Flightopsconsult Ltd | Professional & scientific | 2022 |
| Flimax Ltd | Manufacturing | 2018 |
| Flint Cleaning Limited | Administrative & support | 2024 |
| Flint Court (Linton) Management Company Limited | Real estate | 2006 |
| Flint Court (Owners) Limited | Real estate | 2007 |
| Flit (Cambridge) Limited | Manufacturing | 2015 |
| Flitcroft LEA RTM Company Limited | Households | 2006 |
| FLO and Burt Wedding Stationery Ltd | Professional & scientific | 2021 |
| Flo-Tax Limited | Professional & scientific | 2014 |
| Floating Cambar Limited | Hospitality | 2017 |
| Floella Bird Ltd | Arts & recreation | 2019 |
| Floix Limited | Information & communication | 2023 |
| Flok Health Ltd | Health & social care | 2022 |
| Floohm Limited | Information & communication | 2017 |
| Flopflip Ltd | Hospitality | 2024 |
| Florence Cambridge Ltd | Wholesale & retail | 2023 |
| Flores Associates Limited | Education | 2021 |
| Florescer Limited | Health & social care | 2024 |
| Florin Aircraft Maintenance Ltd | Manufacturing | 2024 |
| Florin and Marta Composites Ltd | Manufacturing | 2022 |
| Florinc Ltd | Manufacturing | 2026 |
| Flossy Clouds Co., Ltd | Professional & scientific | 2019 |
| Flotsm Limited | Information & communication | 2014 |
| Flow Homes Stays Ltd | Real estate | 2026 |
| Flow Myna Ltd | Information & communication | 2025 |
| Flow Science UK Ltd. | Information & communication | 2019 |
| Flow State Productions Ltd | Information & communication | 2025 |
| Flowend Ltd | Information & communication | 2019 |
| Flower Fire Ltd | Wholesale & retail | 2024 |
| Flower Street Management Company Limited | Real estate | 1995 |
| Flowops Ltd | Information & communication | 2025 |
| Fluent (Cambridge) Ltd | Information & communication | 2007 |
| Fluid (EM) Limited | Other services | 2008 |
| Fluidicate Ltd | Professional & scientific | 2022 |
| Fluidsys Limited | Professional & scientific | 2021 |
| Flusso Limited | Professional & scientific | 2016 |
| Flux and Code Ltd | Information & communication | 2026 |
| Fluxys UK Limited | Financial services | 2015 |
| FLV Services Limited | Administrative & support | 2009 |
| FLY Dragon Tour Limited | Administrative & support | 2012 |
| FLY to Inspire Limited | Administrative & support | 2024 |
| Flybywire Group Limited | Transport & logistics | 2024 |
| Flying Cat Band Limited | Arts & recreation | 2023 |
| Flying Horse Aviation Ltd | Manufacturing | 2022 |
| Flying Start Admin Limited | Administrative & support | 2024 |
| Flynet Limited | Information & communication | 1996 |
| Flynn Hodkinson Ltd | Professional & scientific | 2013 |
| Flytex Garment Limited | Wholesale & retail | 2023 |
| FM Family Law Limited | Professional & scientific | 2011 |
| FM Property Lets Limited | Real estate | 2021 |
| FN1X Limited | Professional & scientific | 2018 |
| Focal Point Positioning Ltd. | Professional & scientific | 2015 |
| Focus Tutoring Limited | Education | 2025 |
| Fogden Farms | Agriculture & fishing | 2010 |
| Foglia Pesca Lucas Ltd | Manufacturing | 2023 |
| Foglia Tavare Studio Limited | Professional & scientific | 2021 |
| Follow Your Fire Ltd. | Information & communication | 2017 |
| Fomo Technology Co., Limited | Extraterritorial | 2017 |
| Food Ishq Ltd | Hospitality | 2024 |
| Food Junction Limited | Hospitality | 2016 |
| Food Scholars Consulting Limited | Professional & scientific | 2019 |
| Food Wholesale 24 Hours Limited | Wholesale & retail | 2025 |
| Foodbud Limited | Information & communication | 2021 |
| Foodco UK (Blackpool) Ltd | Real estate | 2021 |
| Foodco UK (Castle Court) Ltd | Real estate | 2023 |
| Foodco UK (Chelmsford) Ltd | Real estate | 2020 |
| Foodco UK (Cheltenham) Ltd | Real estate | 2023 |
| Foodco UK (Dunfermline) Ltd | Real estate | 2020 |
| Foodco UK (Fremlin Walk) Ltd | Real estate | 2022 |
| Foodco UK (Harrogate) Ltd | Real estate | 2023 |
| Foodco UK (Newry) Ltd | Real estate | 2023 |
| Foodco UK (Norwich) Ltd | Real estate | 2019 |
| Foodco UK (Richmond) Ltd | Real estate | 2023 |
| Foodco UK (Romford) Ltd | Real estate | 2020 |
| Foodco UK (Wakefield) Ltd | Real estate | 2020 |
| Foodco UK Franchising Ltd | Wholesale & retail | 2020 |
| Foodco UK Holdings Ltd | Financial services | 2020 |
| Foodco UK Services Ltd | Administrative & support | 2020 |
| Foodworks Holding UK Limited | Agriculture & fishing | 2018 |
| Foonlife Co., Ltd | Wholesale & retail | 2023 |
| Football FUN Factory (Community 008) Limited | Arts & recreation | 2020 |
| Football FUN Factory (Community 009) Ltd | Arts & recreation | 2020 |
| Football FUN Factory (Community 121) Limited | Arts & recreation | 2024 |
| Football FUN Factory (Community 60) Limited | Arts & recreation | 2022 |
| Football FUN Factory (Franchising) Limited | Arts & recreation | 2019 |
| Football FUN Factory (Head Office) Ltd | Arts & recreation | 2022 |
| Football FUN Factory Ltd | Arts & recreation | 2017 |
| Footherley Projects Limited | Construction | 2026 |