| Full Baskets Green Grocer Limited | Wholesale & retail | 2023 |
| Full Circle - Mental Health | Health & social care | 2025 |
| Full Circle Docklands Ltd | Arts & recreation | 2011 |
| Full Fabrications Ltd | Manufacturing | 2016 |
| Full House Labels & Packaging Ltd | Administrative & support | 2020 |
| Full House Limited | Arts & recreation | 2016 |
| Full House Property Limited | Real estate | 2019 |
| Full Metal Aardvark Limited | Information & communication | 2013 |
| Full Moon Projects Limited | Hospitality | 2015 |
| Full Potential Coaching - With Sophia Ltd | Information & communication | 2022 |
| Full Power Tuning Ltd | Extraterritorial | 2023 |
| Full Reach Projects Ltd | Professional & scientific | 2025 |
| Full Stack Modeller Ltd | Education | 2020 |
| Full Windsor Limited | Professional & scientific | 2011 |
| Fuller & Roper (Holdings) Limited | Extraterritorial | 2012 |
| Fuller & Roper Limited | Professional & scientific | 2011 |
| Fuller Futures Limited | Professional & scientific | 2025 |
| Fuller Productions Limited | Arts & recreation | 2014 |
| Fuller's Fixers Ltd | Construction | 2023 |
| Fullers Limited | Construction | 2008 |
| Fullrogue Ltd | Administrative & support | 2020 |
| Fullscript Ltd | Information & communication | 2023 |
| Fullum & Holt UK Limited | Wholesale & retail | 2012 |
| Fully Charged Show Limited | Professional & scientific | 2017 |
| Fulton Boiler Works, (Great Britain) Limited | Manufacturing | 1965 |
| Fulton Limited | Manufacturing | 2002 |
| Fulton Site Services Ltd | Manufacturing | 2010 |
| Fumasoftware Limited | Professional & scientific | 2009 |
| FUN 4 Families UK C.I.C. | Arts & recreation | 2019 |
| FUN Bobbies Ltd | Wholesale & retail | 2026 |
| FUN City (UK) Ltd | Arts & recreation | 1996 |
| FUN City 1880 Ltd | Wholesale & retail | 2020 |
| FUN FUN FUN Limited | Information & communication | 2013 |
| Fun.Da.Men.Tal (Bristol) Limited | Real estate | 2012 |
| Funchal Investments Limited | Financial services | 1999 |
| Function Design Limited | Information & communication | 2013 |
| Function First Occupational Therapy Limited | Health & social care | 2014 |
| Functional Fitness Bristol Limited | Arts & recreation | 2012 |
| Functional Kids OT Ltd | Health & social care | 2022 |
| Fund Their Future | Financial services | 2003 |
| Fundamental Solutions Limited | Professional & scientific | 2016 |
| Funder Finder Ltd | Financial services | 2017 |
| Funding Compass Limited | Financial services | 2020 |
| Fundsupermarket Limited | Professional & scientific | 2016 |
| Fundsurfer Ltd | Information & communication | 2012 |
| Funga Biotech Ltd | Professional & scientific | 2026 |
| Funk CF Ltd | Financial services | 2023 |
| Funk YOU Know Limited | Arts & recreation | 2025 |
| Funktionlust Ltd | Arts & recreation | 2009 |
| Funky Bottom Ltd | Arts & recreation | 2003 |
| Funky Geek Ltd. | Information & communication | 2013 |
| Funky Moped Limited | Professional & scientific | 2012 |
| Funky Tastebudds Limited | Hospitality | 2017 |
| Funtasia Clubz Inc. Turizm Ticaret Ltd. STI. Ltd. | Other services | 2025 |
| FUR Baby Groom Room Ltd | Other services | 2026 |
| Furber Building Services Limited | Construction | 2022 |
| Furhome Limited | Households | 1979 |
| Furious Panda Limited | Information & communication | 2006 |
| Furlong Developments Limited | Other services | 2021 |
| Furness Consulting Limited | Professional & scientific | 2025 |
| Furniture Associates Executive Search Limited | Administrative & support | 2009 |
| Furroway Property Management Limited | Administrative & support | 1983 |
| Further Limited | Professional & scientific | 2006 |
| Furthermead Contracting Ltd | Professional & scientific | 2020 |
| Furud Solar Ltd | Energy | 2020 |
| Furyon Ltd | Wholesale & retail | 2024 |
| Fuse Recruitment Limited | Administrative & support | 2010 |
| Fuse Training Ltd | Arts & recreation | 2024 |
| Fused Events & Productions Limited | Other services | 2012 |
| Fuseland Mechanical Services Limited | Construction | 2014 |
| Fuseland Property Services Ltd | Construction | 2023 |
| Fusion Delights Bristol Ltd | Hospitality | 2024 |
| Fusion Graphics Limited | Construction | 2007 |
| Fusion Hair and Beauty Salon Ltd | Administrative & support | 2017 |
| Fusion Hair and Beauty Training School Ltd | Education | 2015 |
| Fusion Media Scaling Ltd | Professional & scientific | 2024 |
| Fusion Network (Swuk) Limited | Professional & scientific | 2025 |
| Fusion Processing Ltd | Professional & scientific | 2012 |
| Fusion Property Limited | Real estate | 2018 |
| Fusion Talent Limited | Administrative & support | 2021 |
| Fusion Training Solutions Ltd | Extraterritorial | 2025 |
| Futai Investment Ltd | Real estate | 2022 |
| Futanni Ltd | Extraterritorial | 2021 |
| Futberg LP | | 2012 |
| Futebol - Arte Limited | Arts & recreation | 2003 |
| Futsal 360 Limited | Education | 2020 |
| Futsoul Ltd | Wholesale & retail | 2019 |
| Futura Commercial Services Limited | Hospitality | 2015 |
| Futura Learning Partnership | Education | 2011 |
| Future Arts Entertainment Ltd | Manufacturing | 2025 |
| Future Bathrooms Limited | Construction | 2014 |
| Future Cert Limited | Hospitality | 2015 |
| Future Construction Services Ltd | Construction | 2022 |
| Future Drilling Limited | Health & social care | 2009 |
| Future Energy Resourcing Limited | Administrative & support | 2016 |
| Future Environment Ltd | Professional & scientific | 2022 |
| Future Environmental Technologies Engineering Limited | Professional & scientific | 2011 |
| Future Environmental Technologies Limited | Professional & scientific | 2009 |
| Future Farm UK Operations Limited | Agriculture & fishing | 2011 |
| Future Forward Solutions Limited | Professional & scientific | 2025 |