| Flo's Friends Care Limited | Health & social care | 2025 |
| Flockhart Bergmann Limited | Professional & scientific | 2024 |
| Floortastic (Boston) Ltd | Wholesale & retail | 2020 |
| Florence Deco Ltd | Manufacturing | 2018 |
| Flovolt Ltd | Construction | 2023 |
| Flower Friends Ltd | Wholesale & retail | 2026 |
| Flowers & Plants Distribution Limited | Extraterritorial | 2012 |
| Flowfast Property Management Limited | Households | 1983 |
| Flying IMP Business Supplies Ltd | Wholesale & retail | 2025 |
| FMR Rhode Island, Inc | | 2000 |
| Fogam Ltd | Transport & logistics | 2018 |
| Fold Hill Foods (Liverpool) Limited | Manufacturing | 2018 |
| Fold Hill Foods Limited | Manufacturing | 1979 |
| Fold Hill Nurseries | Agriculture & fishing | 1962 |
| Food Chain Partnerships Limited | Hospitality | 2008 |
| Forceshift (Contracting) Limited | Water & waste | 1989 |
| Forceshift Skip Hire Limited | Water & waste | 2010 |
| Forceshift Transport Ltd | Transport & logistics | 2011 |
| Fordman Limited | Information & communication | 2016 |
| Forever Body Aesthetic Ltd | Health & social care | 2023 |
| Form of Intelligence Ltd | Hospitality | 2015 |
| Formattive Ltd | Wholesale & retail | 2015 |
| Formattive Years Ltd | Extraterritorial | 2016 |
| Formex Build Ltd | Construction | 2026 |
| Forty-Seven Energy Management Ltd | Professional & scientific | 2019 |
| Fotiq Ltd | Professional & scientific | 2025 |
| Fountain Trailers Limited | Extraterritorial | 2003 |
| Four Colour Solutions Ltd | Manufacturing | 2023 |
| Four Nations Healthcare Ltd | Financial services | 2021 |
| FOX Recruitment Lincs Ltd | Administrative & support | 2019 |
| FOX Transportation Group Ltd | Transport & logistics | 2019 |
| Franco Construction Ltd | Construction | 2019 |
| Franken Motors Ltd | Wholesale & retail | 2023 |
| Fred Grant | Agriculture & fishing | 1953 |
| Fredori Property Ltd | Real estate | 2018 |
| Freedom HR & Coaching Ltd | Administrative & support | 2021 |
| Freiston Associates Limited | Professional & scientific | 2014 |
| Freiston Properties Ltd | Real estate | 2023 |
| French Construction Specialists (UK) Limited | Construction | 2016 |
| French Correction Glass Care Ltd | Wholesale & retail | 2015 |
| Frenchpride Limited | Wholesale & retail | 2019 |
| Fresh Kicks Ltd | Manufacturing | 2018 |
| Freshdrop Limited | Wholesale & retail | 2005 |
| Freshpeel Produce Limited | Manufacturing | 1995 |
| Frog Hall Farms Limited | Agriculture & fishing | 1976 |
| Frytimes Ltd | Hospitality | 2025 |
| FS Innovate Limited | Transport & logistics | 2023 |
| FT Tyres & Auto Centres Ltd | Wholesale & retail | 2012 |
| Fuddy Duck Limited | Manufacturing | 2016 |
| Furnicity Ltd | Wholesale & retail | 2020 |
| Future Lawn Ltd | Professional & scientific | 2021 |
| Future Solutions NOW Limited | Administrative & support | 2026 |
| Fydell Street Barbers Ltd | Other services | 2024 |
| G & P Read Limited | Agriculture & fishing | 2021 |
| G a Scholey & SON Limited | Agriculture & fishing | 2010 |
| G P Stores Limited | Wholesale & retail | 2016 |
| G&A Crop Nutrition Ltd | Agriculture & fishing | 2020 |
| G&B Carpets Ltd | Financial services | 2020 |
| G&E Metasupply Limited | Wholesale & retail | 2025 |
| G-Veg Limited | Agriculture & fishing | 1997 |
| G.B. Agricultural Contractors Limited | Agriculture & fishing | 2007 |
| G.G.K. Smith Associates Limited | Professional & scientific | 1976 |
| G.Shapalas & Bobos LLP | | 2022 |
| Gaia Land and Planning Ltd | Real estate | 2023 |
| Gammons Court Leaseholders Company Limited | Households | 2016 |
| Gardens by Greenacres Ltd | Administrative & support | 2018 |
| Garry Harris Plumbing & Heating Limited | Construction | 2011 |
| Gary Watts Limited | Transport & logistics | 2013 |
| GAS Pro Serv Ltd | Construction | 2019 |
| Gatehouse Consultancy & Training Limited | Health & social care | 2007 |
| GCH Engineering Services Limited | Manufacturing | 2021 |
| GD Football Coaching Limited | Arts & recreation | 2025 |
| GD View Recruitment Limited | Administrative & support | 2020 |
| GEA Trans Limited | Transport & logistics | 2019 |
| Gearing Brickwork Ltd | Construction | 2022 |
| Gediminas Transport Limited | Transport & logistics | 2020 |
| Gekko & Company Limited | Real estate | 1996 |
| Gemma Solutions Ltd | Administrative & support | 2026 |
| Generating Opportunity CIC | Other services | 2016 |
| Genfrost UK Limited | Wholesale & retail | 2011 |
| Genius Konnect Ltd | Wholesale & retail | 2021 |
| Genius Technology Solutions Limited | Information & communication | 2020 |
| Genprop Limited | Real estate | 2018 |
| Geoff Gilbert Air Cargo Limited | Real estate | 1998 |
| Geoff Gilbert International Limited | Real estate | 1985 |
| Geometric Joinery Ltd | Construction | 2019 |
| George H.Kime & Co.Limited | Transport & logistics | 1938 |
| George Hull (Game Dealers) Limited | | 1973 |
| George's Cocktails Ltd | Hospitality | 2026 |
| Georgians (Boston) Limited(The) | Health & social care | 1986 |
| Georgina Power Transport Consultancy Ltd | Transport & logistics | 2013 |
| GG Engineering Ltd | Wholesale & retail | 2025 |
| GG Engineering Solutions Ltd | Professional & scientific | 2019 |
| GGD Trans Ltd | Transport & logistics | 2017 |
| GHR Consulting Ltd | Extraterritorial | 2012 |
| Gibbons Rental Group Ltd | Real estate | 2019 |
| Gibsons Servicing Limited | Wholesale & retail | 2025 |
| Giedrius Cargo Limited | Transport & logistics | 2018 |
| Gierex Ltd | Transport & logistics | 2025 |
| Gillrange Limited | Real estate | 1989 |