| Foreman & Hanna Limited | Extraterritorial | 2011 |
| Foremost Roofing Limited | Construction | 2014 |
| Foremost Signs Limited | Manufacturing | 1991 |
| Forensic Isotope Ratio Mass Spectrometry Network | Other services | 2009 |
| Foreshore Building Improvements Ltd | Construction | 2022 |
| Foresight Search Ltd | Professional & scientific | 2020 |
| Foresport Fencing Limited | Construction | 2009 |
| Forest & the Flowers Ltd | Wholesale & retail | 2020 |
| Forest Child CIC | Administrative & support | 2018 |
| Forest Larder Limited | Agriculture & fishing | 2018 |
| Forest of Avon Trust | Agriculture & fishing | 2007 |
| Forest of Avon Wood Products Co-Operative Limited | Manufacturing | 1999 |
| Forest Park Cemetery and Crematorium Limited | Other services | 2002 |
| Forest Resource Consultancy Limited | Agriculture & fishing | 2012 |
| Forest Spirit Media Ltd | Information & communication | 2025 |
| Forest Vets Limited | Extraterritorial | 2014 |
| Foreste Limited | Real estate | 2022 |
| Foresters@Downend Ltd | Hospitality | 2022 |
| Forestknoll Property Management Limited | Real estate | 2002 |
| Forestry Conservation Consultancy Ltd | Agriculture & fishing | 2025 |
| Forever After Hire Ltd | Arts & recreation | 2019 |
| Forever Boomtown Limited | Administrative & support | 2015 |
| Forever Bound Ltd | Other services | 2020 |
| Forever Green Cleaning Ltd | Administrative & support | 2023 |
| Forever Green Packaging Ltd | Wholesale & retail | 2021 |
| Forever Home Rescue CIC | Other services | 2026 |
| Forever Ignite Limited | Administrative & support | 2014 |
| Forever Loving Homes Ltd | Real estate | 2023 |
| Forever Pedalling Bristol Ltd | Wholesale & retail | 2016 |
| Forever Pine Trade Ltd | Wholesale & retail | 2024 |
| Forever Season Ltd | Information & communication | 2023 |
| Foreverbuilding Ltd | Construction | 2020 |
| Foreverever Ltd | Professional & scientific | 2024 |
| Forevermore Property Ltd | Real estate | 2016 |
| Forexium Ltd | Information & communication | 2025 |
| Forford Services Limited | Information & communication | 2017 |
| Forge Accommodation Limited | Hospitality | 2012 |
| Forge Car Sales Limited | Wholesale & retail | 2008 |
| Forge Crew Ltd | Construction | 2024 |
| Forge Fire Safety Ltd | Public administration | 2026 |
| Forge Meet and Greet Ltd | Administrative & support | 2023 |
| Forge Oak Limited | Construction | 2007 |
| Forge Scaffolding Limited | Construction | 2015 |
| Forgetful Elephant Productions Limited | Information & communication | 2011 |
| Forgewell and Stokes Ltd | Professional & scientific | 2025 |
| Forgian Group Ltd | Manufacturing | 2010 |
| Fork Lift Maintenance Services Limited | Manufacturing | 2024 |
| Forklift Technologies Limited | Manufacturing | 2020 |
| Form Post Limited | Arts & recreation | 2017 |
| Form South West Ltd | Construction | 2024 |
| Forma Pasta Limited | Hospitality | 2024 |
| Forma Pilates Limited | Arts & recreation | 2025 |
| Forma Projects South West Ltd | Construction | 2025 |
| Formaarchive Ltd | Manufacturing | 2026 |
| Formadome UK Limited | Construction | 2010 |
| Formative Facilities Limited | Administrative & support | 2012 |
| Formative Training Solutions Limited | Administrative & support | 2014 |
| Formax Limited | Information & communication | 2026 |
| Forme Clothing Ltd | Wholesale & retail | 2025 |
| Forme Space Group Ltd | Real estate | 2023 |
| Formhire Ltd | Administrative & support | 2024 |
| Formlabs Inc (UK) Limited | Manufacturing | 2022 |
| Forms & Functions Limited | Professional & scientific | 2010 |
| Formula 4 Solutions Ltd | Professional & scientific | 2015 |
| Formula Aluminium Systems UK Ltd. | Construction | 2003 |
| Formula Door Systems (UK) Limited | Professional & scientific | 2005 |
| Formula Health & Fitness Ltd | Arts & recreation | 2023 |
| Formulate Associates Limited | Administrative & support | 2020 |
| Formya Ltd | Construction | 2015 |
| Forpost AID Ukraine Limited | Health & social care | 2024 |
| Forrest Agent Ltd | Real estate | 2016 |
| Forrest Formations Ltd | Information & communication | 2025 |
| Forrestbrown Limited | Professional & scientific | 2012 |
| Forrister.Net Limited | Information & communication | 2008 |
| Forshall Medico-Legal Services Limited | Health & social care | 2011 |
| Forshare AI Ltd | Information & communication | 2025 |
| Forss Holdings Limited | Financial services | 2019 |
| Forster Clark Engineering Consultants Limited | Construction | 2013 |
| Forster Hall Limited Partnership | | 2006 |
| Fortaleza Design & Build Limited | Construction | 2024 |
| Fortannia Limited | Administrative & support | 2015 |
| Forte & IVY Ltd | Professional & scientific | 2020 |
| Fortech Solutions Limited | Professional & scientific | 2014 |
| Fortelex Ltd | Information & communication | 2023 |
| Fortem Business Ltd | Administrative & support | 2010 |
| Fortem Design Events Ltd | Administrative & support | 2015 |
| Fortem Drink Ltd | Extraterritorial | 2021 |
| Fortem ET Ltd | Administrative & support | 2021 |
| Fortem Food and Drink Ltd | Administrative & support | 2015 |
| Fortem Food Ltd | Extraterritorial | 2021 |
| Fortem Gbbs Ltd | Extraterritorial | 2011 |
| Fortem Grab and Go Ltd | Administrative & support | 2025 |
| Fortem International Ltd | Administrative & support | 2011 |
| Fortem NDE Europe Ltd | Administrative & support | 2022 |
| Fortem NDE Global Ltd | Administrative & support | 2021 |
| Fortem Property Group Ltd | Real estate | 2022 |
| Fortem Retailing Ltd | Administrative & support | 2019 |
| Fortem Rscl Ltd | Administrative & support | 2021 |
| Fortem Smart Retail Ltd | Administrative & support | 2021 |
| Fortem White Label Ltd | Administrative & support | 2019 |