| Fidentia NO 600 LLP | | 2023 |
| Fidentia NO. 048 LLP | | 2006 |
| Fidentia NO. 088 LLP | | 2006 |
| Fidentia NO. 309 LLP | | 2015 |
| Fidentia NO. 310 LLP | | 2007 |
| Fidentia NO. 553 LLP | | 2010 |
| Fidentia NO.079 LLP | | 2006 |
| Fidentia Nominees Limited | Professional & scientific | 2008 |
| Fidentia Representatives Limited | Professional & scientific | 2011 |
| Fidentia Services LLP | | 2008 |
| Fidentia Trustees Limited | Professional & scientific | 2008 |
| Fighting Fire Fit Ltd | Other services | 2024 |
| Fill Strong Ltd | Wholesale & retail | 2025 |
| Financial Investment Consultancy Services Limited | Professional & scientific | 1988 |
| Financial Makeover Limited | Financial services | 2007 |
| Findmydriver Ltd | Transport & logistics | 2020 |
| Fineturf Machinery Limited | Wholesale & retail | 2014 |
| Finkin's Ltd | Hospitality | 2018 |
| Finsport Ltd | Wholesale & retail | 2011 |
| Firby Limited | Financial services | 2025 |
| Fire Fire Sound Ltd | Information & communication | 2024 |
| First Explorers Ltd | Education | 2014 |
| First Leasing UK Ltd | Financial services | 2002 |
| Fish 1ST (UK) Ltd | Manufacturing | 2016 |
| Fittneo Limited | Wholesale & retail | 2024 |
| Five and Co Consulting Limited | Professional & scientific | 2020 |
| Five First Ltd | Wholesale & retail | 2024 |
| Fivestripe Limited | Administrative & support | 2021 |
| FJA Services Ltd | Information & communication | 2025 |
| Flexible Insulation Covers Limited | Manufacturing | 2009 |
| Flourish Hospitality Limited | Professional & scientific | 2024 |
| Fluid Power Design Limited | Manufacturing | 1997 |
| Flywheel Investment Group Ltd | Financial services | 2019 |
| FMC Electrical Contractors Limited | Construction | 2011 |
| Follows Caravan Park Ltd | Hospitality | 2025 |
| Ford Construction Consultants Limited | Professional & scientific | 2014 |
| Ford Contracts & Consulting Ltd | Professional & scientific | 2024 |
| Forest Essential UK Ltd | Wholesale & retail | 2023 |
| Forever Flawless Aesthetics Ltd | Health & social care | 2018 |
| Forge Construction (East Midlands) Limited | Construction | 2001 |
| Formosa Wellbeing Ltd | Health & social care | 2020 |
| Fortuna Fortis Ltd | Financial services | 2015 |
| Fortune House NG31 Ltd | Hospitality | 2025 |
| Fosse Way 429 LLP | | 2007 |
| Foston Lodge Stables Limited | Agriculture & fishing | 2019 |
| Four Golden Paws Ltd | Agriculture & fishing | 2025 |
| Four Seasons Future Planning Ltd | Professional & scientific | 2019 |
| FOX Tarn Limited | Agriculture & fishing | 2025 |
| FP Estates Limited | Real estate | 2011 |
| Francis Munroe Ltd | Other services | 2023 |
| Franco's Events Limited | Hospitality | 2022 |
| Freetime (Grantham) Limited | Financial services | 2016 |
| Freight Logik Limited | Transport & logistics | 2018 |
| French Living Books Limited | Arts & recreation | 2003 |
| Freshpath Food Solutions Ltd | Professional & scientific | 2025 |
| Friendly Food Mart Limited | Administrative & support | 2024 |
| Friends and Culture CIC | Hospitality | 2026 |
| Friends on a Journey Ltd | Other services | 2021 |
| Friga Limited | Financial services | 2011 |
| Front Rowe Productions Limited | Information & communication | 2022 |
| Fuell Training Limited | Hospitality | 2026 |
| Fulbeck Clothing Ltd | Wholesale & retail | 2025 |
| Fulbeck Craft Center Ltd | Wholesale & retail | 2026 |
| Fulbeck Gardens Cottage and Vineyard Limited | Agriculture & fishing | 2017 |
| Funfields Ltd | Health & social care | 2014 |
| Funkybird Ltd | Wholesale & retail | 2022 |
| Futureself Limited | Health & social care | 2018 |
| G & J Harper Property Services Limited | Construction | 2016 |
| G Bellamy Solutions Limited | Construction | 2023 |
| G D C Glass Limited | Wholesale & retail | 2023 |
| G E D S I V Ltd | Real estate | 2024 |
| G H Linnell Limited | Other services | 2017 |
| G Jania Limited | Health & social care | 2015 |
| G L Property Services (East Midlands) Ltd | Construction | 2026 |
| G M Transport Services Ltd | Professional & scientific | 2019 |
| G R Ward Contractors LLP | | 2022 |
| G W Lockton Agri Services Ltd | Wholesale & retail | 2025 |
| G. a. Jenkinson & Sons Limited | Agriculture & fishing | 1971 |
| G.A.S. Tech Plumbing and Heating Services Limited | Other services | 2016 |
| G.C. Forman Family Farms Ltd | Agriculture & fishing | 2015 |
| G.R.Ward & Co. | Agriculture & fishing | 1958 |
| Gadzooks Limited | Information & communication | 2010 |
| Gainline Consultancy Ltd | Professional & scientific | 2015 |
| Gainsborough Corner Garage Limited | Manufacturing | 2009 |
| Galago Software Limited | Information & communication | 2022 |
| Galaxy Fish Bar (Grantham) Ltd | Hospitality | 2024 |
| Gambles Carpentry Joinery & Building Limited | Construction | 1997 |
| Gamston Sushi Limited | Hospitality | 2025 |
| Gannon Capital Limited | Financial services | 2014 |
| Garden Elements Limited | Administrative & support | 2022 |
| Gardner Douglas Sports Cars Limited | Manufacturing | 2003 |
| Garth Vincent Antique Auctions Limited | Wholesale & retail | 2025 |
| Garthpool Underwriting Limited | Financial services | 2002 |
| Gary Bond Handyman & Property Maintenance Services Limited | Construction | 2024 |
| Gary Underwood Limited | Financial services | 2014 |
| Gather Social Limited | Information & communication | 2015 |
| Gather Technologies Limited | Information & communication | 2026 |
| Gbsportswear Ltd | Wholesale & retail | 2026 |
| Geckostix Ltd | Wholesale & retail | 2025 |
| Gelston Cross Ltd | Professional & scientific | 2019 |