| Fifteen Lyndhurst Road Limited | Households | 1982 |
| Fifth Wheel Transport Limited | Transport & logistics | 2025 |
| FIG Cashmere Ltd | Wholesale & retail | 1998 |
| Fight Nation Limited | Arts & recreation | 2025 |
| Fikralabs Ltd | Information & communication | 2026 |
| Filepoint Ltd | Information & communication | 2015 |
| Fillers Unlimited Ltd | Health & social care | 2020 |
| Finance and Business Planning Limited | Professional & scientific | 2025 |
| Financial Intermediary Services Limited | Professional & scientific | 2011 |
| Fincham Place Management Company Limited | Households | 2019 |
| Fincham View Management Company Limited | Households | 2017 |
| Findchoice Property Management Limited | Households | 1991 |
| Fineline Building Services Ltd | Construction | 2015 |
| Finmobile Data Ltd | Information & communication | 2014 |
| Finmore Ltd | Financial services | 2010 |
| Finnco Style Limited | Wholesale & retail | 2024 |
| Fircroft (Sunningdale) Freehold Company Ltd | Households | 2023 |
| Fircroft (Sunningdale) Management Company Limited | Households | 2012 |
| Fire Cover Installations Limited | Construction | 1989 |
| Firebird Events Limited | Administrative & support | 2000 |
| Firenet International Limited | Public administration | 2015 |
| Firgrove Hill Flat Management Company Limited | Households | 2003 |
| First Ancells (Fleet) Management Company Limited | Households | 1987 |
| First Ancells Farm (Fleet) Management Company Limited | Households | 1997 |
| First Avenue Estates Ltd | Real estate | 2008 |
| First Call Aviation Limited | Administrative & support | 2020 |
| First Call Managed Services Ltd. | Administrative & support | 2009 |
| First Care 4U Ltd | Health & social care | 2023 |
| First Choice Fire Service Ltd | Construction | 2018 |
| First Light Independent Care Ltd | Administrative & support | 2020 |
| First Location Data Bank Ltd | Information & communication | 2012 |
| First Union Property Company Limited | Extraterritorial | 1997 |
| Firsttask Ltd | Construction | 2022 |
| Firtown Property Management Limited | Households | 1990 |
| Fison Instruments Ltd | Manufacturing | 2019 |
| Fit 2 Live Limited | Health & social care | 2009 |
| Five Star AV Limited | Arts & recreation | 2017 |
| Fiveways (Camberley) Management Company Limited | Households | 1986 |
| FIX My Ride PVT Ltd | Wholesale & retail | 2026 |
| FIX Your TEC Limited | Information & communication | 2017 |
| FIX2GO Limited | Extraterritorial | 2018 |
| FJT Limited | Information & communication | 2024 |
| FK Training & Retail Ltd | Wholesale & retail | 2025 |
| FKC 68 Limited | Hospitality | 2026 |
| Flare Facilities (UK) Limited | Information & communication | 2014 |
| Flare Media Films Ltd. | Information & communication | 2011 |
| Flare Media Productions Ltd | Administrative & support | 2012 |
| Flats 54-60A Gordon Road Ashford Management Company Limited | Households | 2018 |
| FLB Europe Ltd | Wholesale & retail | 2015 |
| Fleet Car Sales Limited | Wholesale & retail | 2010 |
| Fleet Services Southern Limited | Wholesale & retail | 1986 |
| Flexpa Ltd | Administrative & support | 2013 |
| Fling Finance Ltd | Wholesale & retail | 2025 |
| Flix Electrics Limited | Construction | 2020 |
| Floor Plans U Sketch Limited | Administrative & support | 2010 |
| Floor Trim Systems Ltd | Construction | 2020 |
| Florence House (Guildford) Management Company Limited | Households | 2018 |
| Flourish Partners Group Limited | Professional & scientific | 2023 |
| Flow Solutions Heat Limited | Construction | 2012 |
| Flow Systems Limited | Administrative & support | 2022 |
| Fluid Leadership Limited | Education | 2013 |
| Flying Dutchman Consultancy Limited | Professional & scientific | 2017 |
| Flying Spanner Ltd | Professional & scientific | 2024 |
| Focus Frame Limited | Professional & scientific | 2023 |
| Focus Services (GB) Limited | Real estate | 1988 |
| Focus Workspace Ltd | Other services | 2020 |
| Focused Sales Management Limited | Professional & scientific | 2021 |
| Focused Talent Consulting Limited | Professional & scientific | 2022 |
| FOLD4 Limited | Professional & scientific | 2006 |
| Fone World Service Centre Limited | Wholesale & retail | 2026 |
| Food and Board Ltd | Hospitality | 2020 |
| Foodies Haven Ltd | Hospitality | 2024 |
| Foodies Pizza and Grill Limited | Hospitality | 2025 |
| Footprint Creative Ltd | Professional & scientific | 2018 |
| Footsie 101 Ltd | Wholesale & retail | 2018 |
| Footy FUN 4 Kids Ltd | Education | 2019 |
| Forays Homes (Mindenhurst) Ltd | Construction | 2025 |
| Forefort Limited | Administrative & support | 2018 |
| Forefront Physiotherapy Limited | Other services | 2019 |
| Forest Car Services Limited | Wholesale & retail | 2019 |
| Forest Dene Management Company Limited | Households | 1986 |
| Forgelinkuk Ltd | Education | 2025 |
| Fort Rose and Co Ltd. | Administrative & support | 2014 |
| Forte Safety Management Limited | Professional & scientific | 2005 |
| Fortes Corporation Limited | Information & communication | 2000 |
| Fortitude Property Management Ltd | Real estate | 2022 |
| Fortune Greenworks Limited | Wholesale & retail | 2025 |
| Fortuneswell Capital Limited | Financial services | 2013 |
| Fortuneswell Developments Ltd. | Extraterritorial | 2013 |
| Fortuneswell Developments SPV2 Ltd | Construction | 2015 |
| FORTY40 Racing Ltd | Arts & recreation | 2019 |
| Fortyone(Uk) Ltd | Information & communication | 2015 |
| Foster Harrington Solicitors Limited | Professional & scientific | 2013 |
| Fosters Estate Agents Ltd | Real estate | 2015 |
| Fosters Letting Agents Ltd | Real estate | 2015 |
| Found Technology Partners Limited | Administrative & support | 2024 |
| Fountain Court (Ascot) Limited | Other services | 1989 |
| Four Seven SIX Ltd | Professional & scientific | 2025 |
| Four-Seven Woodland Crescent Limited | Households | 2015 |
| Fourwalls Group Holdings Limited | Financial services | 2016 |