| Frangleton Limited | Information & communication | 2019 |
| Frankbunk Ltd | Wholesale & retail | 2019 |
| Franklin College Trust | Education | 2025 |
| Franklin Holdco Limited | Professional & scientific | 2010 |
| Fraser Seafood Trading Limited | Manufacturing | 2019 |
| Frau Green Ltd | Wholesale & retail | 2012 |
| Fred Margarson (Holdings) Limited | Financial services | 2024 |
| Fred Margarson Limited | Construction | 1960 |
| Free Kashmir Limited | Wholesale & retail | 2019 |
| Freedomspeaks Ltd | Professional & scientific | 2021 |
| Freelance (UK) Limited | Transport & logistics | 2003 |
| Freelance Group Ltd | Financial services | 2020 |
| Freelance Print Staff Limited | Manufacturing | 2013 |
| Freemantle H&S Limited | Construction | 2025 |
| Freestyle Academy CIC | Education | 2022 |
| Freezer Services Limited | Other services | 1998 |
| Freezertech Limited | Other services | 2008 |
| Freight Wizard Limited | Transport & logistics | 2016 |
| Fresh Grimsby Fish Limited | Wholesale & retail | 2002 |
| Fresh OFF the Press Ltd. | Wholesale & retail | 2019 |
| Fresh-Fro Limited | Wholesale & retail | 1984 |
| Freshney Green Limited | Health & social care | 2008 |
| Freshney Green Management Limited | Real estate | 2009 |
| Freshney LLP | | 2024 |
| Freshney Pelham Care Limited | Health & social care | 2008 |
| Freshta Limited | Other services | 2009 |
| Freshwater Lettings Limited | Real estate | 2006 |
| Friary Stitch Limited | Wholesale & retail | 2015 |
| Friel Industrial Thermal Solutions Ltd | Manufacturing | 2025 |
| Friends Hair Ltd | Other services | 2016 |
| Frithville (Lincolnshire) Limited | Wholesale & retail | 2012 |
| Frizcom Limited | Manufacturing | 2016 |
| Frobisher House Management Limited | Real estate | 2007 |
| From House 2 Home Limited | Real estate | 2015 |
| Front IT Consulting Ltd | Information & communication | 2016 |
| Fronthold Property Management Limited | Households | 1986 |
| Frontline Clinical Governance Ltd | Professional & scientific | 2026 |
| Frost PHG Limited | Construction | 2013 |
| FSC Retail Ltd | Wholesale & retail | 2025 |
| FST Automotive Sales Limited | Wholesale & retail | 2016 |
| FT Cromwell Property Ltd | Real estate | 2025 |
| Fulger HGV Ltd | Transport & logistics | 2020 |
| Funkispec Limited | Information & communication | 2014 |
| Furi Ltd | Wholesale & retail | 2015 |
| Furlock Properties Limited | Construction | 2006 |
| Furmans Limited | Construction | 2003 |
| Furness (E, C & I) Limited | Manufacturing | 2007 |
| Fused Pixel Ltd | Professional & scientific | 2026 |
| Fusion Active CIC | Health & social care | 2023 |
| Fusion Hair Co (Grimsby) Limited | Other services | 2007 |
| Fussey Engineering Limited | Construction | 2002 |
| Fussey Holdings Limited | Financial services | 2010 |
| Fussey Services Limited | Construction | 2020 |
| Future Songs Ltd | Information & communication | 2015 |
| Future Web Applications Limited | Information & communication | 2016 |
| Futurebuild (Lincs) Ltd | Financial services | 2020 |
| Fuxiang Limited | Hospitality | 2015 |
| Fuze Education Limited | Information & communication | 2026 |
| G & C Electrical Ltd | Construction | 2008 |
| G & D Lincoln Ltd | Construction | 2014 |
| G & D TV Mount Specialists Limited | Construction | 2020 |
| G & L Grimsby Ltd | Administrative & support | 2026 |
| G & M Properties (Lincs) Limited | Construction | 2025 |
| G & N Country Leisure Limited | Wholesale & retail | 2006 |
| G & S Supply Chain Ltd | Transport & logistics | 2021 |
| G a Jackson Construction Ltd | Construction | 2020 |
| G B Property Developments (Lincs) Limited | Real estate | 2010 |
| G Franklin Ltd | Manufacturing | 2014 |
| G H W Joinery Limited | Manufacturing | 2019 |
| G J I Properties Limited | Real estate | 2011 |
| G Keser Properties Ltd | Real estate | 2025 |
| G L C Repairs Limited | Wholesale & retail | 2002 |
| G Laidlers Limited | Professional & scientific | 2019 |
| G Lewsam Property Ltd | Real estate | 2024 |
| G M Jones Carpentry & Construction Ltd | Construction | 2019 |
| G Nails Limited | Other services | 2024 |
| G Snape Construction Ltd | Construction | 2017 |
| G T Kidals Building Ltd | Construction | 2022 |
| G&G UK Properties Ltd | Real estate | 2025 |
| G&T Holdings (Lincs) Limited | Financial services | 2026 |
| G-Force Confined Space Rescue Solutions Ltd | Professional & scientific | 2024 |
| G-Forse Training Solutions Limited | Professional & scientific | 2018 |
| G-Tech Electrical Contractors Limited | Construction | 1996 |
| G-Tech Holdings Limited | Financial services | 2020 |
| G. G. Leisure Services Limited | Construction | 2007 |
| G. Keys (Builders) Limited | Construction | 2003 |
| G. P. Pallets Limited | Wholesale & retail | 2002 |
| G. W. Strandt & Sons Ltd. | Manufacturing | 2016 |
| G.A.S. Integrity Limited | Mining & quarrying | 2008 |
| G.B. Agencies Limited | Transport & logistics | 1983 |
| G.B. Motorships Limited | Transport & logistics | 1994 |
| G.B. Shipping & Forwarding Limited | Transport & logistics | 2002 |
| G.B. Tachopak Limited | Transport & logistics | 1980 |
| G.B. Terminals (Northern) Limited | Transport & logistics | 2003 |
| G.B. Terminals (Southern) Limited | Transport & logistics | 2000 |
| G.B. Terminals (Western) Limited | Transport & logistics | 2003 |
| G.B. Terminals Limited | Transport & logistics | 1991 |
| G.C. Tyler Limited | Construction | 1951 |
| G.D. Bolts Limited | Construction | 1989 |
| G.E.T. Switched on Ltd | Construction | 2025 |