| Forum for Democratic Futures CIC | Professional & scientific | 2025 |
| Fotheringhays Limited | Real estate | 2019 |
| Found Ceramics Limited | Education | 2025 |
| Fourways Fabrications Limited | Manufacturing | 1997 |
| FOX & Hounds Davidson Ltd | Other services | 2022 |
| FOX HGV Ltd | Transport & logistics | 2022 |
| FOX Resourcing & Recruitment Ltd | Administrative & support | 2014 |
| FOX Resourcing Ltd | Other services | 2007 |
| Foxbrae Developments Ltd | Construction | 2026 |
| Foxford Investments (Midlands) Limited | Financial services | 2021 |
| Foxglade Showjumping Limited | Arts & recreation | 2020 |
| FP Supermarket Ltd | Wholesale & retail | 2025 |
| Fradigo Global Enterprise Ltd | Other services | 2024 |
| Franklin Fields House Ltd | Real estate | 2023 |
| Frecha Ltd | Information & communication | 2026 |
| Fred N Friends Ltd | Arts & recreation | 2016 |
| Free Fusion Ltd | Professional & scientific | 2012 |
| Freemans Building Services Limited | Construction | 2025 |
| Fresh Panel Ltd | Wholesale & retail | 2025 |
| Fridge Wholesale Limited | Wholesale & retail | 2025 |
| Friedl Auto's Ltd | Wholesale & retail | 2022 |
| Frimps Healthcare Ltd | Health & social care | 2021 |
| From House 2 Home (Corby) Ltd | Real estate | 2020 |
| Frontline Care & Support Services Ltd | Health & social care | 2021 |
| Frostbite Productions Limited | Information & communication | 2022 |
| FTS Property Executive Limited | Real estate | 2025 |
| Fuji Flooring Ltd | Construction | 2025 |
| Full of Beans Little Stanion Ltd | Hospitality | 2023 |
| Furniture 321 Ltd | Manufacturing | 2019 |
| Furniture 4 ALL Corby C.I.C. | Wholesale & retail | 2023 |
| Fusion Trading Group Ltd | Wholesale & retail | 2023 |
| Futuring | | 1969 |
| G & F Property & Developments Ltd | Construction | 2020 |
| G & JDS Solutions Limited | Information & communication | 2005 |
| G Barratt Ltd | Manufacturing | 2012 |
| G O F Limited | Health & social care | 1992 |
| G&E Vending Machines Ltd | Wholesale & retail | 2025 |
| G&Jc Properties Ltd | Real estate | 2022 |
| G&L Events Ltd | Other services | 2021 |
| G&Z Haulage Ltd | Transport & logistics | 2015 |
| G'S Caravan Cleaning Services Ltd | Real estate | 2026 |
| G-M Motors Limited | Wholesale & retail | 2016 |
| G-Mir-Sofia-Drive Tech Ltd | Transport & logistics | 2025 |
| G-Sonic Logistic Ltd | Transport & logistics | 2026 |
| G.A.B Design Limited | Wholesale & retail | 2017 |
| G.B.F.Contractors Ltd | Construction | 2015 |
| G.E.L.F. Assets Ltd | Real estate | 2017 |
| G.Sak Transport Ltd | Transport & logistics | 2018 |
| G19 Solutions Limited | Professional & scientific | 2013 |
| G23 Engineering Limited | Professional & scientific | 2015 |
| G23 Holdings Limited | Financial services | 2018 |
| Gabi Investments Limited | Real estate | 2021 |
| Gabriel EL Trans Ltd | Manufacturing | 2025 |
| Gabriel Servrent Limited | Real estate | 2024 |
| GAE Eshott Limited | Administrative & support | 2024 |
| GAE Forest View Limited | Administrative & support | 2024 |
| GAE Good Hook Limited | Administrative & support | 2024 |
| GAE NO2 Limited | Administrative & support | 2024 |
| GAE NO3 Limited | Administrative & support | 2025 |
| GAE NO4 Limited | Administrative & support | 2025 |
| GAE NO5 Limited | Administrative & support | 2025 |
| Galion Homes (Bigbury) Limited | Real estate | 2015 |
| Gallimaufry Limited | Other services | 2022 |
| Gamble Maintenance Services Limited | Administrative & support | 2000 |
| Gangsta Girl Clothing Ltd | Wholesale & retail | 2021 |
| Gappayuk Limited | Wholesale & retail | 2011 |
| Garaz Tech Ltd | Manufacturing | 2020 |
| Gardencraft Ltd | Administrative & support | 1998 |
| Gary Tunn Automotive Limited | Wholesale & retail | 2019 |
| GAS Heating Plumbing Ltd | Construction | 2025 |
| Gatecare Service Limited | Administrative & support | 2011 |
| Gateway Digital Hubs Limited | Professional & scientific | 2024 |
| Gateway Housing Services Limited | Real estate | 2016 |
| Gatsby Barbers Limited | Other services | 2014 |
| Gavit Ltd | Information & communication | 2025 |
| Gavmac Transport Ltd | Transport & logistics | 2019 |
| Gawpol Limited | Transport & logistics | 2026 |
| Gazy's Safety Critical Ltd | Transport & logistics | 2023 |
| GB Engineering Services Ltd | Professional & scientific | 2025 |
| GCH1 Realisations Ltd | Administrative & support | 2023 |
| GCS RECRUITMENT24 Limited | Administrative & support | 2024 |
| Gdelecrico Limited | Energy | 2025 |
| GED Building Services Limited | Construction | 2017 |
| Gedtyres Ltd | Wholesale & retail | 2023 |
| GEE Trading Ltd | Wholesale & retail | 2026 |
| Geek IP Ltd | Information & communication | 2012 |
| Geez a WEE Hand Ltd | Administrative & support | 2026 |
| GEM. Contracting Ltd | Professional & scientific | 2025 |
| General Property Maintenance Ltd | Other services | 2021 |
| Genesis One Investments Limited | Health & social care | 2019 |
| Genial Living Limited | Real estate | 2018 |
| Genner Consulting Ltd | Administrative & support | 2017 |
| Gentle Sole Limited | Health & social care | 2022 |
| George & Youngman PUB Company Ltd | Hospitality | 2025 |
| George Stan Engineering Limited | Professional & scientific | 2026 |
| Geothermal Systems Limited | Energy | 2012 |
| Geri S Beauty Ltd | Other services | 2025 |
| Gfab Installations Ltd | Construction | 2021 |
| Ghenadie Anghel Smart Solutions Ltd | Wholesale & retail | 2016 |
| Ghetes Ltd | Transport & logistics | 2025 |