| Flightcore Global Limited | Administrative & support | 2025 |
| Flights for Their Future CIC | Agriculture & fishing | 2023 |
| Flinders Design Group Ltd | Professional & scientific | 2024 |
| Flint Cottage Ltd | Real estate | 2021 |
| Flint Tree Surgeons Limited | Administrative & support | 2025 |
| Flix Hockey Ltd | Manufacturing | 2020 |
| Floorballkit Ltd | Wholesale & retail | 2012 |
| Flora Motors Leamington Spa Ltd | Wholesale & retail | 2015 |
| Floratica Ltd | Agriculture & fishing | 2023 |
| Florere Group Ltd | Hospitality | 2025 |
| Flounders Investco Limited | Financial services | 2025 |
| Flourish 3-D Limited | Health & social care | 2014 |
| Flow Duct Limited | Construction | 2022 |
| Flower's Cafe Limited | Hospitality | 2024 |
| Flowers Wheatley Plumbing Limited | Construction | 2006 |
| Flowloup Limited | Professional & scientific | 2022 |
| Fluent Education Ltd | Education | 2023 |
| Flying COW Burgers Limited | Hospitality | 2018 |
| FM Services Group Limited | Information & communication | 1996 |
| Fndai Limited | Information & communication | 2024 |
| Focus Advice Technology Holdings Limited | Information & communication | 2024 |
| Focus Business Solutions Limited | Information & communication | 1993 |
| Focus Site Investigations Group Limited | Financial services | 2024 |
| Fogg Vision Ltd | Information & communication | 2023 |
| Folklor House Ltd | Hospitality | 2024 |
| Folklore House Ltd | Hospitality | 2026 |
| Follow Politics Ltd | Information & communication | 2019 |
| Fone Galaxy Limited | Wholesale & retail | 2020 |
| Foodie Court Limited | Hospitality | 2023 |
| Football for ALL Ltd | Arts & recreation | 2024 |
| FOR FX Sake Ltd | Wholesale & retail | 2023 |
| Forces Community Fitness Ltd | Arts & recreation | 2022 |
| Ford Cottages Management Company Limited | Households | 2018 |
| Forde Management Group Ltd | Professional & scientific | 2025 |
| Forest School Nursery Limited | Education | 2019 |
| Forestcove Properties Limited | Real estate | 2006 |
| Forever Glow Dorridge Limited | Other services | 2025 |
| Forma Design (U.K.) Limited | Wholesale & retail | 2004 |
| Formosa Fencing and Groundworks Limited | Construction | 2019 |
| Formpos Ltd | Wholesale & retail | 2024 |
| Formula Racing Group Limited | Information & communication | 2017 |
| Forrester White Ltd | Real estate | 2024 |
| Forthright Property Solutions Ltd | Real estate | 2024 |
| Fortify Defence Limited | Information & communication | 2023 |
| Fortify Smart Grid Ltd | Energy | 2025 |
| Fortnum Properties Limited | Real estate | 2020 |
| Fortore Ltd | Wholesale & retail | 2023 |
| Fortris Estates Limited | Real estate | 2023 |
| Fortunati Ltd | Hospitality | 2025 |
| Fortune Peak UK Limited | Real estate | 2026 |
| Forwood Products Ltd | Financial services | 2021 |
| Forza Clienti Limited | Wholesale & retail | 2021 |
| Fosse Cottage Media Ltd | Manufacturing | 2022 |
| Fosse Farm Residents Company Limited | Administrative & support | 2021 |
| Fosse Garage Limited | Wholesale & retail | 2014 |
| Fosse Garages (Leamington Spa) Limited | Wholesale & retail | 1990 |
| Fosse Paddocks Limited | Professional & scientific | 2004 |
| Fosseway Classic Car Parts Ltd | Wholesale & retail | 2026 |
| Fosseway Classics Group Limited | Financial services | 2026 |
| Foster Property Enterprises Ltd | Real estate | 2022 |
| Four Ashes Park Management Company Limited | Real estate | 2017 |
| Four Brothers Services Limited | Wholesale & retail | 2025 |
| Four Walls Building Company Limited | Construction | 2012 |
| FOX Design Studio Ltd | Administrative & support | 2016 |
| FOX Technology & Data Ltd | Information & communication | 2021 |
| Foxtail Development Limited | Professional & scientific | 2007 |
| Foxtree Property Limited | Real estate | 2015 |
| Foxwarp Limited | Professional & scientific | 2009 |
| Foxwood Green Property Limited | Real estate | 2022 |
| Foxworks Engineering Ltd | Professional & scientific | 2022 |
| FPO Support Services Ltd | Health & social care | 2023 |
| Fractional Delivery Ltd | Professional & scientific | 2026 |
| Fragmere Properties Limited | Real estate | 1971 |
| Frago & Co Ltd | Financial services | 2017 |
| Fragrance House Ltd | Wholesale & retail | 2010 |
| Frames Snooker Club Limited | Arts & recreation | 2007 |
| Frances Edward Properties Ltd | Real estate | 2024 |
| Frank Investments Limited | Financial services | 2005 |
| Frankels Solutions Limited | Administrative & support | 2021 |
| Franklin Heath Limited | Information & communication | 2010 |
| Frearbros Labs Limited | Information & communication | 1999 |
| Free Mind Consultancy Limited | Professional & scientific | 2020 |
| Free Radical Network Limited | Professional & scientific | 2011 |
| Freeman Coaching Ltd | Administrative & support | 2011 |
| Freeman Commercial Ltd | Real estate | 2026 |
| Freeman Consulting Services Limited | Professional & scientific | 2023 |
| Freight Transport Solutions Limited | Professional & scientific | 2011 |
| French Hair Limited | Other services | 2025 |
| French Investments Limited | Real estate | 2019 |
| Fresh Freds Ltd | Wholesale & retail | 2024 |
| Freshly Ground INK Ltd | Other services | 2020 |
| Friday Enterprises Limited | Real estate | 1985 |
| Fridgeseal Ltd | Manufacturing | 2022 |
| Fried House Ltd | Hospitality | 2025 |
| Frog Inc Limited | Other services | 2008 |
| Frog Worxs Ltd | Administrative & support | 2025 |
| Frogspawn Marketing Limited | Professional & scientific | 2017 |
| Frontline Solutions Group Ltd | Transport & logistics | 2024 |
| Fruitbowl Studio Ltd | Professional & scientific | 2020 |
| FSS Training Limited | Education | 2025 |