| Fatukay Ltd | Administrative & support | 2022 |
| Fauld Precision Machining Co. Limited | Manufacturing | 1978 |
| Fazeley Car Spa Ltd | Wholesale & retail | 2017 |
| FBS 2017 Ltd | Manufacturing | 2016 |
| FDA Commercial Limited | Professional & scientific | 2026 |
| FEE Simple Investments Ltd | Real estate | 1976 |
| Fegan Lettings Ltd | Real estate | 2025 |
| Felmontiux Ltd | Health & social care | 2020 |
| Fenn Paving Ltd | Administrative & support | 2025 |
| Fern & Frame Homeware Limited | Wholesale & retail | 2025 |
| Festival Court Limited | Households | 2000 |
| Festival of Sport Limited | Arts & recreation | 2020 |
| FFP Coats Limited | Professional & scientific | 2025 |
| FHF Holdings Limited | Financial services | 2026 |
| Fibon UK Limited | Wholesale & retail | 2007 |
| Fidem Group Limited | Financial services | 2023 |
| Field Hamlin Limited | Financial services | 2017 |
| Field Hamlin Wealth Management Limited | Professional & scientific | 2023 |
| Field-Elicious Limited | Hospitality | 2013 |
| Fighting Fit Partnership Ltd | Arts & recreation | 2023 |
| Financier Worldwide Ltd | Manufacturing | 1998 |
| Finding Starfish Ltd | Professional & scientific | 2021 |
| Fine Fit Blinds and Shutters Limited | Construction | 2022 |
| Fine Line Barbers Ltd | Other services | 2025 |
| Fine Tune Football Limited | Education | 2021 |
| Finepack Ltd. | Administrative & support | 2020 |
| Finesse Homes Limited | Extraterritorial | 2009 |
| Finley George Limited | Wholesale & retail | 2012 |
| Fiocchi United Kingdom Limited | Manufacturing | 2007 |
| Fireflux Ltd | Public administration | 2017 |
| Firmus Properties Limited | Real estate | 2017 |
| Firnorm Limited | Real estate | 1972 |
| First Class Property Investments Limited | Real estate | 2010 |
| First Class Technologies Limited | Information & communication | 1996 |
| First Direct Contracting Limited | Construction | 2015 |
| First Direct Grab Hire Limited | Administrative & support | 2015 |
| First Electrical Systems Limited | Manufacturing | 2012 |
| First Investments Group Ltd | Real estate | 2019 |
| First Rate Wealthtech Limited | Information & communication | 2021 |
| First Steps (Stonehouse Farm) Limited | Education | 2010 |
| First Steps Children's Nursery (Group) Ltd | Education | 2011 |
| First Steps Children's Nursery (ST Edwards) Ltd | Education | 2013 |
| First Steps Childrens Nursery (Rathvilly) Limited | Education | 2009 |
| First Steps Childrens Nursery Limited | Education | 2002 |
| First World Media Ltd | Information & communication | 2015 |
| Fish Face Foods Ltd | Hospitality | 2022 |
| Fisherwick Management Co. Limited | Households | 1990 |
| Fisherwick Projects Ltd | Professional & scientific | 2017 |
| Fit LAB (Lichfield) Ltd | Arts & recreation | 2017 |
| Fitkicks Leisure Limited | Arts & recreation | 2018 |
| Fitness With HJ Ltd | Manufacturing | 2017 |
| Five Rivers Catering Division Limited | Hospitality | 2004 |
| Five Rivers Group Holdings Limited | Financial services | 2021 |
| Five Star Nails Spa Ltd | Other services | 2022 |
| FKM Properties Limited | Financial services | 2020 |
| Flair Agency Ltd | Administrative & support | 2019 |
| Flair Retail Ltd | Administrative & support | 2019 |
| Flamerite Fires Group Limited | Professional & scientific | 2018 |
| Flamerite Fires Holdings Limited | Professional & scientific | 2010 |
| Flash Flash Productions Ltd | Information & communication | 2008 |
| Fletcher Building & Construction Services Limited | Construction | 2003 |
| Flexibility for Fighters Limited | Health & social care | 2024 |
| Flick Pictures Limited | Professional & scientific | 1982 |
| Flint Automotive Ltd | Information & communication | 2020 |
| FLO Accountancy Limited | Professional & scientific | 2023 |
| Floorss Ltd | Wholesale & retail | 2024 |
| Floridian Homes Ltd | Administrative & support | 2013 |
| Flovia Limited | Real estate | 2021 |
| Flow Energy Limited | Energy | 2011 |
| Flower and Sons Brickwork and Building Contractors Ltd | Administrative & support | 2018 |
| Fluesafe Designs Ltd | Manufacturing | 1998 |
| Fluesafe Fabrications Ltd | Manufacturing | 2000 |
| Flustra Projects Ltd | Professional & scientific | 2024 |
| Flyaway Studios Ltd | Information & communication | 2022 |
| Flying the Nest Properties Ltd | Households | 2018 |
| FM Service Ltd | Administrative & support | 2010 |
| FM Technology Limited | Wholesale & retail | 2024 |
| FME Autos Limited | Wholesale & retail | 2017 |
| FMP Contracts Ltd | Manufacturing | 2016 |
| Focused Healthcare Limited | Extraterritorial | 2007 |
| Foden Commercials Limited | Real estate | 2019 |
| Fodens Developments Limited | Construction | 2016 |
| Food Factory Cafe Limited | Hospitality | 2020 |
| Foodchain ID Certification Limited | Professional & scientific | 1999 |
| Foodchain ID Technical Services Limited | Professional & scientific | 2006 |
| Football Club for Kids Limited | Education | 2024 |
| Footfix (Birmingham) Limited | Health & social care | 2023 |
| Footherley Limited | Construction | 2019 |
| Footnote Clinic Ltd | Health & social care | 2026 |
| FOR What ITS Worth Ltd | Professional & scientific | 2025 |
| Force Group Holdings Ltd | Financial services | 2024 |
| Fordrough Management Company Limited | Households | 2002 |
| Foremost Design & Build Limited | Construction | 2025 |
| Forever Sun Limited | Other services | 2016 |
| Forge Farm Fabrication Ltd | Manufacturing | 2025 |
| Forge Mill Consultancy Limited | Professional & scientific | 2010 |
| Forgemarch Limited | Households | 1981 |
| Forgham Property Services Limited | Construction | 2003 |
| Form Building and Maintenance Ltd | Construction | 2020 |
| Formidable Integrated Solutions (Formis) Limited | Information & communication | 2011 |