| Floras Cafe Ltd | Hospitality | 2019 |
| Florenca Limited | Hospitality | 2024 |
| Florence Court RTM Company Limited | Households | 2011 |
| Florian Baluta Ltd | Transport & logistics | 2017 |
| Florin & Dana Transport Ltd | Transport & logistics | 2019 |
| Florin Drive Ltd | Transport & logistics | 2020 |
| Flourish Mental Health Pathways Ltd | Health & social care | 2026 |
| Flourish Solutions Limited | Wholesale & retail | 2019 |
| Flow Aeronautics Limited | Wholesale & retail | 2025 |
| Flow Engineering Pro Solutions Ltd | Professional & scientific | 2026 |
| Flow Switch Ltd | Construction | 2020 |
| Flower Garden Group Properties Ltd | Real estate | 2020 |
| Flowers by Lisa Limited | Wholesale & retail | 2024 |
| Flowerscrunchiees Ltd | Wholesale & retail | 2025 |
| Flowform AI Ltd | Information & communication | 2026 |
| Flowpay Ltd | Professional & scientific | 2024 |
| Flowrider London Ltd | Construction | 2025 |
| Flowstate Living Ltd | Wholesale & retail | 2024 |
| Flute Entertainment Ltd | Hospitality | 2025 |
| Flutters (Leisure) Limited | Construction | 1981 |
| Flutters Property Limited | Construction | 2013 |
| Flxpresscouriers Ltd | Transport & logistics | 2026 |
| Flying Giant Ltd | Arts & recreation | 2023 |
| FM & FD Ltd | Hospitality | 2022 |
| FM Car Valeting Services Limited | Administrative & support | 2009 |
| FM Chauffers Ltd | Transport & logistics | 2024 |
| Fmap Cleaning Limited | Construction | 2022 |
| FMH Medical Limited | Health & social care | 2013 |
| FMI Holdings Limited | Real estate | 2019 |
| FN Automated Door Systems Ltd | Construction | 2024 |
| Fndk Ltd | Professional & scientific | 2025 |
| Foamboard on Line Limited | Wholesale & retail | 2008 |
| Focal Home Improvements Ltd | Manufacturing | 2020 |
| Focus Carpentry Contractors Limited | Construction | 2006 |
| Focus Decorating Limited | Construction | 2015 |
| Focus Homebuild Limited | Construction | 2022 |
| Focus Homefinish Ltd | Households | 2025 |
| Focus Lifting Limited | Construction | 2026 |
| FOD Fashion Ltd | Wholesale & retail | 2021 |
| FOI Retail Services Limited | Professional & scientific | 2012 |
| Fojmac Services Ltd | Wholesale & retail | 2023 |
| Foladex Limited | Other services | 2021 |
| Folders Gate Management Ltd | Households | 2020 |
| Folet Limited | Hospitality | 2013 |
| Folly Fencing Ltd | Construction | 2017 |
| Foneboxbedford Ltd | Real estate | 2019 |
| Food Bruvaz Ltd | Hospitality | 2024 |
| Food ETC CIC | Hospitality | 2019 |
| Food Rider Ltd | Hospitality | 2019 |
| Foot Forward Ltd | Wholesale & retail | 2025 |
| FOOTCARE4EVA Ltd | Health & social care | 2019 |
| Footprints to Recovery Limited | Health & social care | 2019 |
| Footstep Developments Ltd | Real estate | 2025 |
| FOR Property Services Ltd | Hospitality | 2023 |
| FOR the People Ltd | Information & communication | 2025 |
| Forager Feeds Limited | Agriculture & fishing | 2024 |
| Forbes-Laird Arboricultural Consultancy Limited | Professional & scientific | 2004 |
| Force Building Services Limited | Construction | 2016 |
| Forders Property Management Ltd | Real estate | 2022 |
| Fords Packaging Systems Limited | Manufacturing | 2009 |
| Fords Packaging Topco Limited | Manufacturing | 2013 |
| Fordsham Wood (Sharnbrook) Management Company Limited | Households | 2004 |
| Foreshore Solutions Limited | Information & communication | 2005 |
| Forestcane Limited | Real estate | 2000 |
| Forestry Fuels Limited | Agriculture & fishing | 2011 |
| Forever Fitness Ltd | Arts & recreation | 2014 |
| Forever Flawless Ltd | Other services | 2025 |
| Forever Health Studio's Ltd | Arts & recreation | 2018 |
| Forever Step Limited | Real estate | 2024 |
| Forever Step NO 2 Limited | Real estate | 2025 |
| Forever Young Childminding Limited | Education | 2016 |
| Forge Business Services Limited | Professional & scientific | 2018 |
| Forged Productions Ltd | Other services | 2021 |
| Forjays Limited | Wholesale & retail | 2013 |
| Forks & Flavours Ltd | Hospitality | 2025 |
| Form (Midlands) Limited | Manufacturing | 2021 |
| Formaled Ltd | Manufacturing | 2022 |
| Forster & Hales Ltd | Wholesale & retail | 2023 |
| Forster Jones & Associates Ltd | Administrative & support | 2018 |
| FORT3ND Health LP | | 2023 |
| Forte Motors Limited | Wholesale & retail | 2003 |
| Fortia Property Ltd | Real estate | 2023 |
| Fortis (Consultancy) Services Ltd | Information & communication | 2016 |
| Fortis (Scaffold) Services Limited | Construction | 2013 |
| Fortuna Star Ltd | Construction | 2020 |
| Fortune Eximports Ltd | Wholesale & retail | 2002 |
| Fortune Holdings Ltd | Wholesale & retail | 2022 |
| Fortune Realty Holdings Ltd | Real estate | 2023 |
| Forum Retail Limited | Wholesale & retail | 2010 |
| Forward Looking Management Ltd | Professional & scientific | 1998 |
| Forward Sports Coaching Ltd | Arts & recreation | 2021 |
| Fosketts Property Ltd | Real estate | 2025 |
| Fossey Transport Limited | Manufacturing | 2025 |
| Foster Hill Road Limited | Households | 1996 |
| Fosters Catering Enterprise Limited | Hospitality | 2025 |
| Fotomania Ltd | Professional & scientific | 2023 |
| Foundation of Colours CIC | Professional & scientific | 2022 |
| Foundry Court DAV Limited | Construction | 2022 |
| Four Furlongs (Stiffkey) Ltd | Real estate | 2020 |
| Four Management Group Ltd | Information & communication | 2023 |