| Fermenter Limited | Extraterritorial | 2015 |
| Fern Audio Limited | Arts & recreation | 2024 |
| Fern LEA Property Limited | Real estate | 2016 |
| Fern Lodge Management Limited | Real estate | 2000 |
| Fernandes Optometrists (Nailsea) Limited | Health & social care | 2007 |
| Fernbank Court Management Company Limited | Households | 1968 |
| Fernbank Estate Holdings Limited | Financial services | 2017 |
| Fernbank House (Redland) Management Limited | Households | 1976 |
| Fernbank Mansions Management Company Limited | Households | 1984 |
| Ferncliffe Freehold Limited | Real estate | 2010 |
| Ferncliffe Management Company Limited | Households | 2005 |
| Fernell Ventures Ltd | Information & communication | 2025 |
| Fernhall Associates Limited | Information & communication | 2002 |
| Fernleigh Court (Bristol) Management Company Limited | Real estate | 1974 |
| Fernleigh House | Professional & scientific | 2026 |
| Fernleigh House Trowbridge Limited | Households | 2026 |
| Ferns (Exeter) Limited | Hospitality | 2003 |
| Fernside Estates Limited | Real estate | 2015 |
| Fernturn Holdings Limited | Real estate | 1960 |
| Fernwood Property Solutions Ltd | Construction | 2023 |
| Fernz Healthcare Limited | Health & social care | 2019 |
| Ferox and Noble Limited | Manufacturing | 2018 |
| Ferox Ltd | Professional & scientific | 2022 |
| Ferox Racing Limited | Arts & recreation | 2017 |
| Ferrand Property Company Limited | Real estate | 2018 |
| Ferrer Projects Ltd | Construction | 2024 |
| Ferryman's Court Management Company Limited | Real estate | 1987 |
| Ferson Limited | Construction | 1970 |
| Fertility Bristol Limited | Health & social care | 2017 |
| Ferwood Blackhorse Road Management Company Limited | Households | 2024 |
| Festiholdings Limited | Financial services | 2024 |
| Festival and Event Systems Ltd | Information & communication | 2019 |
| Festival Bloodstock Limited | Arts & recreation | 2016 |
| Festival Fashion Limited | Wholesale & retail | 2016 |
| Festival Fifty One Limited | Extraterritorial | 2013 |
| Festival Internships Limited | Professional & scientific | 2023 |
| Festival Leisure Limited | Arts & recreation | 1986 |
| Festival People Ltd | Professional & scientific | 2023 |
| Festival Power Ltd | Construction | 2021 |
| Festival Racing on Course Ltd | Arts & recreation | 1998 |
| Festival Weddings and Events Ltd | Hospitality | 2022 |
| Festivals and Gigs Ltd | Arts & recreation | 2024 |
| Festivehomegifts.Com Ltd | Wholesale & retail | 2014 |
| Fetch & Flourish Ltd | Other services | 2024 |
| Fetchit Ltd | Wholesale & retail | 2026 |
| Fetih Ltd | Hospitality | 2020 |
| Fetlox Limited | Wholesale & retail | 2024 |
| Fettle Product Design Ltd | Professional & scientific | 2026 |
| FEV Insureco Ltd | Information & communication | 2024 |
| Fever Gifts Limited | Wholesale & retail | 2009 |
| Fever Pitch Limited | Information & communication | 2026 |
| Fezzasus Ltd | Manufacturing | 2017 |
| Ffinance Limited | Financial services | 2019 |
| Ffos LAS Solar Developments Limited | Energy | 2011 |
| FG Education Services Ltd | Extraterritorial | 2020 |
| FG Publishing CIC | Information & communication | 2024 |
| FG Structures Limited | Manufacturing | 2001 |
| FGJ Motorcycle Ltd | Wholesale & retail | 2023 |
| FGM Accountancy Limited | Professional & scientific | 2013 |
| FH Ecommerce Limited | Wholesale & retail | 2025 |
| Fhcl Projects Limited | Construction | 2015 |
| FHZ Ltd | Wholesale & retail | 2013 |
| FI Estate Lettings Ltd | Real estate | 2024 |
| FI Property&Investments Ltd | Financial services | 2025 |
| FI Real Ltd | Hospitality | 2014 |
| FI2B Ltd | Transport & logistics | 2025 |
| Fiamu's London Limited | Wholesale & retail | 2023 |
| Fiasco Design Ltd | Information & communication | 2013 |
| Fibre Technologies International Limited | Wholesale & retail | 1990 |
| Fibrefox Ltd | Information & communication | 2018 |
| Fibreline Communications Limited | Professional & scientific | 1990 |
| Fibrescope Networks Limited | Construction | 2018 |
| Fictitious Books Ltd | Other services | 2016 |
| Fidelis AI Ltd | Information & communication | 2024 |
| Fidelis Secure Solutions Ltd | Transport & logistics | 2025 |
| Fidelity Japan Trust PLC | Financial services | 1994 |
| Fides Financial Planning Ltd | Professional & scientific | 2021 |
| Fidget Brothers Ltd | Manufacturing | 2026 |
| Field & Track Research Limited | Professional & scientific | 2016 |
| Fieldbay Management Limited | Information & communication | 2016 |
| Fieldcraft Communications Ltd | Professional & scientific | 2026 |
| Fieldgrove Engineering Services Limited | Manufacturing | 1991 |
| Fielding & Cumber Limited | Extraterritorial | 2008 |
| Fielding Invest Limited | Professional & scientific | 2013 |
| Fields Veterinary Limited | Extraterritorial | 2006 |
| Fieldwork Global Ltd | Professional & scientific | 2025 |
| Fiesta Leisure Ltd. | Arts & recreation | 1992 |
| Fifo Fuel in Fitness OUT Ltd | Wholesale & retail | 2024 |
| Fifteen Alpine Road Management Company Limited | Households | 2018 |
| Fifteen TEN Ltd | Professional & scientific | 2012 |
| Fifteen Twelve Interiors Limited | Professional & scientific | 2024 |
| Fifteen Twelve Limited | Professional & scientific | 2015 |
| Fifty Construction Ltd | Construction | 2025 |
| Fifty Investments Limited | Professional & scientific | 2016 |
| Fifty One Fernbank Road Management Company Limited | Households | 1980 |
| Fifty Property Development Ltd | Real estate | 2022 |
| FIFTYTWO19 Limited | Construction | 2017 |
| FIG and Twig Limited | Administrative & support | 2006 |
| FIG Power Holdings Limited | Financial services | 2022 |
| FIG Power Limited | Professional & scientific | 2022 |