| Fries ME UP Ltd | Hospitality | 2025 |
| Frillco Ltd | Wholesale & retail | 2022 |
| Frisel Consultancy Limited | Professional & scientific | 2019 |
| FRJ Property Limited | Real estate | 2025 |
| Froaks Ltd | Wholesale & retail | 2025 |
| Frobenius Learning Systems Ltd | Information & communication | 2025 |
| Frog Hall Ltd | Professional & scientific | 2018 |
| Frog Investments Limited | Real estate | 2012 |
| Frogbox IT Ltd | Other services | 2012 |
| Froggatt Edge Limited | Financial services | 2017 |
| Froggy International Education Limited | Professional & scientific | 2025 |
| Froggy Ltd | Real estate | 2024 |
| Frogtec Limited | Information & communication | 2020 |
| From the Notebook Limited | Hospitality | 2012 |
| Fromthegroundup Studio Limited | Professional & scientific | 2024 |
| Front ROW Medics Limited | Health & social care | 2026 |
| Frontendwebdeveloper.London Limited | Information & communication | 2014 |
| Frontida Homes Ltd | Administrative & support | 2026 |
| Frontier Brewing Company Limited | Manufacturing | 2014 |
| Frontier Deep Tech Ltd | Administrative & support | 2022 |
| Frontier Personnel Services Limited | Administrative & support | 2014 |
| Frontier Pharma Advisors Limited | Professional & scientific | 2017 |
| Frontier Space Technologies Ltd | Manufacturing | 2021 |
| Frontline Accountancy Experts Ltd | Professional & scientific | 2024 |
| Frontline Cabinet Design Holdings Ltd | Financial services | 2023 |
| Frontline Cabinet Design Limited | Manufacturing | 2004 |
| Frontline Recruitment Derby Limited | Administrative & support | 2014 |
| Frontline Recruitment Leicester Limited | Administrative & support | 2014 |
| Frontline Recruitment National Limited | Administrative & support | 2014 |
| Frontline Recruitment Nottingham Limited | Administrative & support | 2014 |
| Frontline Recruitment Partnerships Limited | Administrative & support | 2015 |
| Frontline Recruitment Services Holdings Limited | Administrative & support | 2004 |
| Frontline Recruitment Weymouth Limited | Administrative & support | 2014 |
| Frontline Research Group Ltd | Professional & scientific | 2024 |
| Frost Motors Ltd | Wholesale & retail | 2024 |
| Frost Transport Solutions Ltd | Wholesale & retail | 2013 |
| Frozen Kebab Ltd | Wholesale & retail | 2024 |
| FRP Mercia Holdco 2 Limited | Energy | 2020 |
| FRP Mercia Holdco 3 Limited | Energy | 2021 |
| FRP Mercia Holdco Limited | Financial services | 2017 |
| FRT PUB Promotions Limited | Hospitality | 2026 |
| Frustrated Chef Limited | Hospitality | 2015 |
| Frustrated Yogi Limited | Professional & scientific | 2019 |
| Fryary Kitchen Ltd | Hospitality | 2026 |
| Frydays Fish and Chips Notts Limited | Hospitality | 2025 |
| Frying Food Limited | Hospitality | 2024 |
| Frying Tonight Limited | Hospitality | 2025 |
| Frytopia Ltd | Hospitality | 2024 |
| FS Altrincham Limited | Extraterritorial | 2000 |
| FS Automotive Limited | Wholesale & retail | 2024 |
| FS Bidco Limited | Administrative & support | 2018 |
| FS Builders Nottingham Limited | Construction | 2023 |
| FS Electrical Installations Ltd | Construction | 2022 |
| FS Midco Limited | Administrative & support | 2018 |
| FS Sellers Ltd | Wholesale & retail | 2024 |
| FS Topco Limited | Administrative & support | 2018 |
| FS99 Ltd | Information & communication | 2025 |
| FSA Property Holdings Limited | Financial services | 2025 |
| FSA Systems Ltd. | Administrative & support | 2022 |
| Fsbm Properties Ltd | Real estate | 2018 |
| FSC Autos Limited | Wholesale & retail | 2024 |
| FSD Property & Support Services Limited | Administrative & support | 2019 |
| FSG Tableware Ltd | Wholesale & retail | 2009 |
| FSK (Midlands) Limited | Education | 2009 |
| FSM Centres Limited | Arts & recreation | 2014 |
| FSM Community CIC | Education | 2023 |
| FSP Acquisition Limited | Financial services | 2009 |
| FSP Holdco Limited | Financial services | 2009 |
| FSW Design Limited | Professional & scientific | 2002 |
| FT Index Limited | Administrative & support | 2013 |
| FT Singh Ltd | Health & social care | 2022 |
| FTA Furnishing Limited | Wholesale & retail | 2014 |
| FTF Energy Limited | Wholesale & retail | 2019 |
| FTF Group Limited | Professional & scientific | 2001 |
| FTF Property Management Ltd | Real estate | 2020 |
| Fthenumbers Ltd | Wholesale & retail | 2025 |
| FTK9 Ltd | Agriculture & fishing | 2023 |
| Ftou Ftou Properties Ltd | Real estate | 2025 |
| FTP Exclusive Limited | Wholesale & retail | 2024 |
| Fttx Resources Limited | Construction | 2017 |
| Fuel Education & Training Ltd | Education | 2023 |
| Fuel Junkie Garage Ltd | Wholesale & retail | 2015 |
| Fuel Your Purpose Ltd | Wholesale & retail | 2023 |
| Fuelglaze Ltd | Manufacturing | 2023 |
| Fulbeck Kart Club Limited | Arts & recreation | 2018 |
| Fulcrum Consultants Limited | Professional & scientific | 2013 |
| Fulford Consulting Limited | Information & communication | 2001 |
| Full Bowl Limited | Hospitality | 2019 |
| Full Circle (Cyclical) Maintenance Limited | Administrative & support | 2014 |
| Full Circle Building Company Limited | Construction | 2019 |
| Full Circles Marketing Ltd | Professional & scientific | 2013 |
| Full Draw Services Limited | Professional & scientific | 2025 |
| Full Service Valeting Ltd | Other services | 2018 |
| Full Square Technologies Ltd | Information & communication | 2008 |
| Full Steam Ahead Domestic Services Ltd. | Other services | 2003 |
| Fuller and Co. Logistics Ltd | Transport & logistics | 2023 |
| Fully Fashioned Limited | Manufacturing | 2010 |
| Fulmak Rewinding Ltd | Manufacturing | 2006 |
| FUN House Property Management Ltd | Households | 2024 |
| Func Fit Company Limited | Arts & recreation | 2024 |