| Fresh United Limited | Hospitality | 2025 |
| Freskaro Ltd | Professional & scientific | 2018 |
| Friction Technologies (UK) Limited | Financial services | 2004 |
| Friends Fighting Cancer Ltd | Arts & recreation | 2013 |
| Friends United Spice Ltd | Hospitality | 2019 |
| Fries Love Event Ltd | Hospitality | 2023 |
| Frobisher Close Management Company Limited | Households | 2003 |
| From Jannah to Jannah Ltd | Wholesale & retail | 2025 |
| Frontier Landscapes South Ltd | Construction | 2015 |
| Frontiers Investments Ltd | Real estate | 2025 |
| Frontiers Superstore Ltd | Wholesale & retail | 2022 |
| Frontline Catering Ltd | Hospitality | 2025 |
| Frontline Communications Group Limited | Administrative & support | 1999 |
| Fruity Limited | Information & communication | 2005 |
| Fsdr Business Services Ltd | Administrative & support | 2018 |
| Fsgj Ltd | Manufacturing | 2025 |
| FSP Health Solutions Limited | Health & social care | 2023 |
| Ftfat Ltd | Construction | 2026 |
| Ftvl (Leasing) Limited | Administrative & support | 2015 |
| Ftvl Ltd | Administrative & support | 2013 |
| FU Xing Oriental Food Centre Limited | Hospitality | 2021 |
| Fucil Datatech Ltd | Wholesale & retail | 2022 |
| Fuego's Portsmouth Ltd | Hospitality | 2019 |
| Fulcrum Manufacturing Limited | Manufacturing | 2004 |
| Fulcrum Trustees Limited | Administrative & support | 2022 |
| Fulcrum Wealth Ltd | Professional & scientific | 2014 |
| Full Bore Services Limited | Information & communication | 2018 |
| Full Gaming IP Limited | Administrative & support | 2026 |
| Full POT Pubs (Horndean) Ltd | Hospitality | 2023 |
| FUN and Active Playgrounds Ltd | Construction | 2016 |
| FUN Park Ltd | Arts & recreation | 2021 |
| Funktifino Design Ltd | Wholesale & retail | 2025 |
| Furness Properties Ltd | Real estate | 2022 |
| Furze Cleaning & Transport Ltd | Extraterritorial | 2018 |
| Furze Court Management Limited | Real estate | 2016 |
| Fusetech Electrical Services Ltd | Construction | 2025 |
| Fusion Fire and Security Ltd | Administrative & support | 2021 |
| Fusion Group Global Ltd | Administrative & support | 2023 |
| Future 8 Ltd | Construction | 2025 |
| Future Build Southern Ltd | Construction | 2023 |
| Future Fire Solutions Limited | Public administration | 2013 |
| Futurebuild Facilities Management Ltd | Administrative & support | 2025 |
| Futurebuild Landscape & Construction Ltd | Construction | 2023 |
| Fuzzy Logic Solutions Limited | Information & communication | 2025 |
| FWA Talent Specialists Ltd | Administrative & support | 2024 |
| G & G Brickwork Ltd | Construction | 2013 |
| G & H Property Angels Ltd | Real estate | 2016 |
| G & H Vehicle Services Ltd | Wholesale & retail | 2015 |
| G & R Electrical Services Limited | Construction | 2003 |
| G & S Developments (Southern) Ltd | Construction | 2015 |
| G & S Jewellers Limited | Wholesale & retail | 2003 |
| G Bainbridge Limited | Construction | 2002 |
| G Boutique Hotel Ltd | Hospitality | 2020 |
| G C J Fluid Systems Limited | Other services | 2019 |
| G D S Homes Limited | Real estate | 2014 |
| G E Carpentry Ltd | Manufacturing | 2020 |
| G E Heard & Sons Limited | Transport & logistics | 2022 |
| G G Electrican Ltd | Construction | 2015 |
| G G Khoury Oncology Limited | Health & social care | 2011 |
| G I Contractors Limited | Construction | 1995 |
| G J M Cleaning Services Limited | Administrative & support | 2004 |
| G J Surveying & Management Limited | Real estate | 2001 |
| G Property Services Ltd | Real estate | 2020 |
| G Richards Property Management Ltd | Real estate | 2026 |
| G Richards Recycling Limited | Administrative & support | 2021 |
| G&B Roofing Solutions Ltd | Construction | 2025 |
| G-Bsxc LLP | | 2023 |
| G-Expo LLP | | 2018 |
| G.H Networks Limited | Professional & scientific | 2020 |
| G.I Projects Ltd | Construction | 2024 |
| G.I.A Construction & Maintenance Ltd | Construction | 2016 |
| G.Johnson Roofing Ltd | Construction | 2023 |
| G.L Healthservices Limited | Other services | 2023 |
| G.R. Ayling Building Contractors Limited | Construction | 2001 |
| G0K Ltd | Information & communication | 2024 |
| G18 Fintech Limited | Information & communication | 2019 |
| G2 Asset Management Limited | Real estate | 2005 |
| G3S Group Ltd | Manufacturing | 1983 |
| GAB Property Limited | Real estate | 2020 |
| Gadfield Limited | Real estate | 2001 |
| Gadget BOY Ltd | Information & communication | 2014 |
| Gain Automation Ltd | Information & communication | 2026 |
| Gainsborough Consulting Limited | Professional & scientific | 2011 |
| Galaxy Gifts Limited | Other services | 2016 |
| Galbi Grill Co Ltd | Hospitality | 2026 |
| Galexim Limited | Agriculture & fishing | 2017 |
| Galileo Enterprises and Consultancy Services Limited | Real estate | 1990 |
| Gallier Holdings Limited | Financial services | 2026 |
| Gallo's Piri Piri & Grill Ltd | Hospitality | 2023 |
| Gambit Groundworks Ltd | Construction | 2023 |
| Game Over Arcades Ltd | Arts & recreation | 2021 |
| Game Over Museum Limited | Arts & recreation | 2013 |
| Gamma Carpentry IOW Ltd | Financial services | 2015 |
| Gamma Holdings (IOW) Limited | Financial services | 2015 |
| Gandhi Takeaway Limited | Hospitality | 2013 |
| Gannet House (Southsea) Limited | Households | 1982 |
| Garage Motors Ltd | Wholesale & retail | 2020 |
| Garatech Southern Limited | Construction | 2022 |
| Garden Angel UK Limited | Administrative & support | 2003 |
| Garden View Freehold Limited | Real estate | 2008 |