| FB Plant Hire Ltd | Administrative & support | 2026 |
| FB Property (2024) Limited | Real estate | 2024 |
| Fbace Ltd | Wholesale & retail | 2019 |
| Fcservice Solutions Ltd | Administrative & support | 2009 |
| Feather Liability Limited | Transport & logistics | 2025 |
| Feed the Beast Detailing Ltd | Manufacturing | 2024 |
| Feel Unique Beauty School Ltd | Education | 2019 |
| Fekta Ltd | Manufacturing | 2023 |
| Felicity White Interiors Ltd | Professional & scientific | 2020 |
| Felixstowe Agencies Limited | Transport & logistics | 2009 |
| Fellows Homes Limited | Construction | 2009 |
| Fellstone Management Ltd | Construction | 2023 |
| Female Fashions Ltd | Wholesale & retail | 2010 |
| Fender Upvc Specialist Limited | Construction | 2021 |
| Fernando Food and Drinks Ltd | Hospitality | 2019 |
| Fernhill Trade Sales Limited | Wholesale & retail | 2008 |
| Feroza Lash & Brow Lounge Ltd | Other services | 2025 |
| Ferris Slater Limited | Administrative & support | 2018 |
| Ferrous Core Trade Limited | Wholesale & retail | 2026 |
| Festive Creations NW Ltd | Wholesale & retail | 2024 |
| Festive Lights Holdings Limited | Financial services | 2021 |
| Festive Lights Limited | Wholesale & retail | 2005 |
| FFR Limited | Professional & scientific | 2023 |
| FGP Paving and Groundworks Ltd | Construction | 2019 |
| FH OPS Ltd | Hospitality | 2022 |
| FI Facilities Management Limited | Construction | 2006 |
| FI Property Group Limited | Financial services | 2010 |
| FI Real Estate Management Limited | Real estate | 2011 |
| Fibre Optical Network Experts Limited | Information & communication | 2009 |
| Fibrecore Engineering Limited | Information & communication | 2024 |
| Fieldsend Construction Limited | Construction | 2017 |
| Fieldview Plastics Ltd | Construction | 2023 |
| Figflex Offices Ltd | Real estate | 2016 |
| Fiiza Ltd | Wholesale & retail | 2025 |
| Fiji Fitness Limited | Other services | 2014 |
| Filcrom Ltd | Wholesale & retail | 2020 |
| Filepure Limited | Extraterritorial | 1999 |
| Films 4 U EIS1 Ltd | Information & communication | 2020 |
| Filtee Ltd | Administrative & support | 2023 |
| FIN & Bone Ltd | Hospitality | 2018 |
| Final Third Football Ltd | Education | 2023 |
| Finance Focus Ltd | Information & communication | 2021 |
| Financial Agent Limited | Transport & logistics | 2015 |
| Financial Connection Wealth Management Limited | Extraterritorial | 2012 |
| Financial Guardian (UK) Ltd | Financial services | 2012 |
| Fine Art Printing Services Limited | Manufacturing | 2019 |
| Finebuild Construction Limited | Construction | 2014 |
| Finely Finished Floors Limited | Construction | 2020 |
| Finley & SON Limited | Transport & logistics | 2018 |
| Finnlay P Davis Limited | Administrative & support | 2020 |
| Finquest Services Limited | Other services | 2018 |
| Fintegrate Financial Solutions Limited | Information & communication | 2019 |
| FIR Tree Chiropractic Ltd | Health & social care | 2026 |
| Fire Alarms Cameras Electrical Ltd | Construction | 2024 |
| Fire Fashion Limited | Wholesale & retail | 2016 |
| Fireaway Telford Limited | Hospitality | 2020 |
| Firecraft Fireplaces Ltd | Wholesale & retail | 2014 |
| Firecraft Holdings Limited | Financial services | 2020 |
| Firefly Integrated Solutions Ltd | Administrative & support | 2019 |
| Firefox Racing Limited | Wholesale & retail | 2009 |
| Firetek (Bristol) Limited | Construction | 2017 |
| First Call Communications Limited | Extraterritorial | 2013 |
| First Choice Building Concepts Ltd | Construction | 2019 |
| First Controls Limited | Professional & scientific | 2016 |
| First Investments Limited | Real estate | 2005 |
| First Response Heating Ltd | Other services | 2018 |
| Firtree Properties (UK) Limited | Real estate | 2009 |
| Fisc Holdings Limited | Financial services | 2017 |
| Fish OR Chip Limited | Other services | 2019 |
| Fit With Coaching Ltd | Arts & recreation | 2019 |
| FIT4LIFE Mindset Academy Limited | Health & social care | 2025 |
| FIT4LIFE Studios Limited | Health & social care | 2021 |
| Fitbox Chorley Limited | Arts & recreation | 2016 |
| Fitbox Events and Merchandise Ltd | Arts & recreation | 2022 |
| Fitness Foda Limited | Hospitality | 2022 |
| Fitzgerald Togher Consulting Ltd | Professional & scientific | 2009 |
| FIX My Lawn Ltd | Professional & scientific | 2026 |
| FJM Property Solutions Ltd | Construction | 2026 |
| FK Properties Management (NW) Ltd | Hospitality | 2019 |
| FKP Scorpio UK Ltd | Arts & recreation | 2018 |
| FL 360 Group Limited | Financial services | 2026 |
| FL 360 Limited | Professional & scientific | 2014 |
| FL Auto Limited | Wholesale & retail | 2020 |
| FL Rehab Limited | Professional & scientific | 2023 |
| Flagstone Security Services Limited | Administrative & support | 2008 |
| Flat 1 Staintons Limited | Hospitality | 2022 |
| Fleet Data Limited | Information & communication | 2018 |
| Fleet First Limited | Wholesale & retail | 2025 |
| Fletcher Fire Solutions Ltd | Public administration | 2023 |
| Fleur Designs Ltd | Wholesale & retail | 2024 |
| Flexible Energy Oversight Registration Body Limited | Other services | 2018 |
| Flexiwork Offices Accrington Limited | Administrative & support | 2021 |
| Flexiwork Offices Limited | Administrative & support | 2021 |
| Flight Structures Limited | Administrative & support | 2007 |
| Flintnine Fasteners Limited | Administrative & support | 1997 |
| Floor Decor of Millhouses Limited | Construction | 2016 |
| Flooring Angels Nationwide Limited | Wholesale & retail | 2019 |
| Flooring by Interiors Limited | Wholesale & retail | 2021 |
| Flourish Finance Limited | Professional & scientific | 2021 |
| Flow Screed Plus Ltd | Construction | 2025 |