| Finch Group Ltd | Wholesale & retail | 2026 |
| Find Nutrition Limited | Information & communication | 2026 |
| Fine Agrochemicals Limited | Manufacturing | 1983 |
| Fine Holdings Limited | Manufacturing | 1993 |
| Fine Yorke Ltd | Health & social care | 2025 |
| Finest Journeys - a Trading Name of Great Vacations Ltd | Administrative & support | 2015 |
| Finn Academy Ltd | Health & social care | 2023 |
| Fiore & Sons Ltd | Construction | 2021 |
| FIR Tree Grove Management Ltd | Households | 2017 |
| Fireball Apps Ltd | Professional & scientific | 2019 |
| Firefly Bar Ltd | Hospitality | 2013 |
| Firetree Publications Limited | Information & communication | 2024 |
| Firmingers LLP | | 2008 |
| First Call Payroll Services Limited | Professional & scientific | 2023 |
| First Choice Electrical Solutions Limited | Construction | 2024 |
| First Choice Property Maintenance LLP | | 2017 |
| First Class Linen Services Ltd | Other services | 2015 |
| First Class Painting Services Ltd | Construction | 2023 |
| First-Assist Recruitment Limited | Administrative & support | 2020 |
| FIRST4INVESTIGATIONS Limited | Administrative & support | 2010 |
| Firth of Forth Limited | Transport & logistics | 2017 |
| FISH4TALENT Limited | Information & communication | 2012 |
| Fisher Humphries & Co. Ltd | Professional & scientific | 2021 |
| Fisher-Edwards Limited | Professional & scientific | 2011 |
| Fishermans Press Ltd | Information & communication | 2020 |
| Fit Kidz Training Limited | Wholesale & retail | 2020 |
| Fit OUT Contracts Holdings Limited | Financial services | 2012 |
| Fit OUT Contracts Ltd | Construction | 2005 |
| Fit OUT Interiors Ltd | Construction | 2012 |
| Fit With KAT Limited | Other services | 2024 |
| FIT3SIXTY Ltd | Arts & recreation | 2015 |
| Fitbakes Ltd | Hospitality | 2018 |
| Fitness Integrating Technology Limited | Manufacturing | 2024 |
| Fitzer Accounting Limited | Professional & scientific | 2025 |
| Fixpoint Services Limited | Construction | 2025 |
| Fizco Barber Salon & Salon Beauty & Cosmetics Ltd | Other services | 2020 |
| Fizz Investments Ltd | Hospitality | 2015 |
| FJ & MJ Limited | Health & social care | 2025 |
| Fjalla Ltd | Extraterritorial | 2023 |
| FKH Associates Limited | Administrative & support | 2018 |
| Flagstick Vintage Limited | Wholesale & retail | 2025 |
| Flagtower Consulting Limited | Information & communication | 2026 |
| Flame Fireplaces Limited | Wholesale & retail | 2005 |
| Flashline Media Limited | Professional & scientific | 2018 |
| Flea Market Ltd | Extraterritorial | 2003 |
| Fleetwood Advisory Ltd | Professional & scientific | 2024 |
| Fletcher Access Ltd | Administrative & support | 2002 |
| Flex 3D Printing Ltd | Manufacturing | 2021 |
| Flexdoor Adjustable Lining Ltd | Wholesale & retail | 2021 |
| Flics Gymnastics Limited | Arts & recreation | 2012 |
| Flik Ultimate Ltd | Arts & recreation | 2015 |
| Flosst Ltd | Information & communication | 2023 |
| Flow Education Ltd | Education | 2020 |
| Flow Sports Therapy Ltd | Health & social care | 2025 |
| Fluid Transformation Limited | Professional & scientific | 2017 |
| Fluidity Drainage and Landscapes Ltd | Water & waste | 2023 |
| Fmckenzie Coaching Limited | Health & social care | 2023 |
| FMK Limited | Real estate | 2025 |
| Focal Logistics Ltd | Information & communication | 2024 |
| Focus Biodiversity Limited | Professional & scientific | 2026 |
| Focus Ecology Limited | Professional & scientific | 2009 |
| Focus Environmental Consultants Limited | Professional & scientific | 2019 |
| Follicle LAB Ltd | Health & social care | 2025 |
| FOM Productions Ltd | Information & communication | 2021 |
| Fontana Limited | Real estate | 2013 |
| Food-Bridge GB Limited | Wholesale & retail | 2016 |
| Foodbridge FSG (GB) Limited | Wholesale & retail | 2020 |
| Foodbridge FSG Limited | Wholesale & retail | 2021 |
| Footsteps Worcestershire Limited | Health & social care | 2012 |
| Fordbank Management Limited | Households | 1990 |
| Foregate Publishing Limited | Information & communication | 2024 |
| Foregate Regeneration Limited | Construction | 2021 |
| Forensic Sales Solutions (FSS) Ltd | Professional & scientific | 2015 |
| Forensys Limited | Information & communication | 2006 |
| Forest Services Ltd | Other services | 2015 |
| Forest Solutions Limited | Professional & scientific | 2019 |
| Foresters View (Fritchley) Resident Management Company Limited | Households | 2017 |
| Forewadds Limited | Financial services | 2026 |
| Forge Mill Holdings Limited | Construction | 1973 |
| Forge Pathways Ltd | Professional & scientific | 2026 |
| Forge Pressure Equipment Ltd | Manufacturing | 2025 |
| Forgeoverland Limited | Wholesale & retail | 2026 |
| Forget-Me-Not Garden Improvements Ltd | Administrative & support | 2021 |
| Formation of Companies Ltd | Information & communication | 2021 |
| Formularad Limited | Health & social care | 2025 |
| Forrester Investments Ltd. | Financial services | 2017 |
| Forsight Group Ltd | Wholesale & retail | 2025 |
| Fort Mews (London Road) Freehold Limited | Households | 2023 |
| Forth Décor Limited | Construction | 2018 |
| Forwrd Advisory Ltd | Professional & scientific | 2025 |
| Fostering Assessments Limited | Health & social care | 2024 |
| Fosters Waste Services Limited | Water & waste | 2019 |
| Foundation Data Platforms Ltd | Information & communication | 2025 |
| Foundation Fostering Limited | Health & social care | 2016 |
| Foundation Skills Centre Limited | Health & social care | 2009 |
| Foundry and Thermal Service Limited | Manufacturing | 2025 |
| Fountain Services Ltd | Other services | 2019 |
| Four Bears Investments Limited | Real estate | 2021 |
| Four Eyes Holdings Ltd | Professional & scientific | 2020 |
| Four Eyes Insight Limited | Professional & scientific | 2013 |