| FR Distribution Limited | Transport & logistics | 2014 |
| Fractional Faculty Ltd | Professional & scientific | 2026 |
| Fradon Properties Limited | Real estate | 2020 |
| Frank Hardy & Sons (Farndon) Limited | Agriculture & fishing | 1973 |
| Frank Thomas Interiors Ltd | Wholesale & retail | 2022 |
| Frank Valeting Center Ltd | Administrative & support | 2023 |
| Frankie's Valeting Ltd | Other services | 2026 |
| Frankland Property Services Limited | Administrative & support | 2007 |
| Franks Rigging Ltd | Information & communication | 2019 |
| Frasz.Medics Ltd | Health & social care | 2022 |
| Frazer Cloud Ltd | Extraterritorial | 2016 |
| Frazers Home Improvements Limited | Construction | 2002 |
| FRB Electrical Ltd | Construction | 2014 |
| Fred Clipsham Limited | Construction | 2008 |
| Freda's Financial Services Limited | Professional & scientific | 2020 |
| Frederick Mews Management Limited | Households | 2011 |
| Freerange Trading Company Limited | Administrative & support | 2002 |
| Frenbury Developments Limited | Construction | 2007 |
| Frenbury Properties Ltd | Construction | 2010 |
| Fresh From the Fields Limited | Wholesale & retail | 2007 |
| Fresh Growers Limited | Agriculture & fishing | 1998 |
| Freshgro Ltd | Extraterritorial | 2007 |
| Friar Lane Films Ltd | Information & communication | 2024 |
| Friary (Newark) Management Company Limited(The) | Households | 1982 |
| Friary Fields Limited | Professional & scientific | 2002 |
| Frontier Forestry and Fencing Ltd | Agriculture & fishing | 2025 |
| Frudd Consulting Ltd | Real estate | 2023 |
| Frugal Manufacturing Limited | Administrative & support | 2024 |
| Fruktolinka Newark Ltd | Wholesale & retail | 2024 |
| Fuji Schools (Wales) Limited | Professional & scientific | 2011 |
| Full Circle Entrance Solutions Ltd | Construction | 2022 |
| Full Circle Service Solutions Ltd | Other services | 2024 |
| Fullbore Newark Ltd | Construction | 2024 |
| Fundinground Ltd | Financial services | 2015 |
| Furlishous Ltd | Agriculture & fishing | 2021 |
| Furniture Works 2 Limited | Other services | 2013 |
| Future Cloud Accounting Limited | Information & communication | 2019 |
| Future Cloud Group Limited | Extraterritorial | 2022 |
| Future Cloud Property Limited | Extraterritorial | 2022 |
| Future Farming Limited | Agriculture & fishing | 2023 |
| Future Prospects Group Ltd | Administrative & support | 2014 |
| Future Reel Servicing and Repairs Ltd | Wholesale & retail | 2018 |
| Future-Tech Electrical Limited | Construction | 2017 |
| Future-Tech Energy Services Ltd | Construction | 2025 |
| Future-Tech Property Limited | Construction | 2024 |
| Futureful Ltd | Professional & scientific | 2018 |
| Futuretech Financial Limited | Professional & scientific | 2015 |
| Fylo Enterprises Limited | Information & communication | 2018 |
| G a F Technical Ltd | Professional & scientific | 2013 |
| G Copley Hsqe Solutions Limited | Professional & scientific | 2010 |
| G M S Fencing and Maintenance Ltd. | Construction | 2015 |
| G Mollison Plastering Contractors Limited | Construction | 2002 |
| G Newman Building Services Limited | Construction | 2009 |
| G R Beech Ltd | Administrative & support | 2014 |
| G Taylor Building Services Ltd | Administrative & support | 2016 |
| G&A Smith Contractors Ltd | Agriculture & fishing | 2020 |
| G&H Therapy Limited | Health & social care | 2017 |
| G&K Marnham Ltd | Hospitality | 2025 |
| G&M Group Ltd | Wholesale & retail | 2017 |
| G&Ss Medical Ltd | Health & social care | 2014 |
| G. Pritchard (Watford) Limited | Real estate | 1963 |
| G. R. Gash Limited | Agriculture & fishing | 2012 |
| G.A.P. Plumbing and Heating Ltd | Construction | 2007 |
| G.E. & B. Fearn Farms Limited | Agriculture & fishing | 1983 |
| G.E. & B. Fearn Limited | Administrative & support | 1991 |
| G.H. Sutton Limited | Agriculture & fishing | 1955 |
| G.H.Porter Ltd | Wholesale & retail | 2024 |
| G.I. Hadfield & SON Limited | Water & waste | 1980 |
| G.J.G. Services (Nottingham) Limited | Wholesale & retail | 2014 |
| G.M.S. Marketing Limited | Other services | 1967 |
| G3 Consulting Ltd | Professional & scientific | 2015 |
| G9 Driveline Ltd | Wholesale & retail | 2020 |
| GA 10 Newark Limited | Hospitality | 2023 |
| Gabba Crane Hire Ltd | Administrative & support | 2019 |
| Gablestock Limited | Manufacturing | 2010 |
| Gaia Asana Ltd | Wholesale & retail | 2025 |
| Galvey Limited | Wholesale & retail | 2007 |
| Ganders Art & Design Limited | Administrative & support | 2006 |
| Gannets Cafe Limited | Hospitality | 1997 |
| Gapwin Holdings Limited | Financial services | 2018 |
| Garden Court Management Company (Pogmoor) Limited | Households | 2000 |
| Garden Ornamentals Ltd | Wholesale & retail | 2013 |
| Garden-Wise Design and Maintain Ltd | Construction | 2022 |
| Garratt Electrical Ltd | Construction | 2022 |
| Garrison Site Management Ltd | Construction | 2018 |
| Gascoignes News Limited | Wholesale & retail | 2003 |
| Gasline Plumbing Heating & Airconditioning Ltd | Construction | 2018 |
| Gates at Home Ltd | Manufacturing | 2021 |
| Gathering of the North Ltd | Arts & recreation | 2026 |
| GB Performance Ltd | Wholesale & retail | 2023 |
| GB Proprietary Ltd | Real estate | 2023 |
| GB Wheels Ltd | Wholesale & retail | 2022 |
| GDG Trade Ltd | Hospitality | 2024 |
| Geldard-Fradd Property Services Limited | Real estate | 2024 |
| GEM Flooring Ltd | Construction | 2021 |
| Gemlee Limited | Transport & logistics | 1975 |
| Gemma Newbold Limited | Financial services | 2021 |
| Gen-Y Marketing Ltd | Professional & scientific | 2025 |
| Generation Pro Cycle Events Limited | Hospitality | 2021 |
| Generik Pharma Limited | Wholesale & retail | 2020 |