| Farcaubat Developments Ltd | Real estate | 2014 |
| Fariya Designs PVT Ltd | Manufacturing | 2017 |
| Farndon KIA Limited | Wholesale & retail | 2025 |
| Farnsfield Autocentre Ltd | Wholesale & retail | 2011 |
| Farnsfield Bakery Ltd | Manufacturing | 2023 |
| Farnsfield Consulting Limited | Administrative & support | 2009 |
| Farrell Software Associates Limited | Information & communication | 1995 |
| Farriers Court (Horseshoe Lane) Management Limited | Households | 1989 |
| Fast Bike Sales Ltd | Wholesale & retail | 2023 |
| FAT Panda Events Limited | Manufacturing | 2016 |
| Fatmans Munchies Ltd | Hospitality | 2025 |
| Fearn Plant Limited | Water & waste | 2000 |
| Felguera Montajes Y Mantenimiento, S.A. | | 2008 |
| Fenlane Joinery Limited | Manufacturing | 2011 |
| Fenlife Limited | Professional & scientific | 1994 |
| Fenton Autos Ltd | Wholesale & retail | 2022 |
| FER35501 Limited | Administrative & support | 2023 |
| FER360SPI01 Limited | Administrative & support | 2023 |
| FER550M01 Limited | Administrative & support | 2023 |
| Fern Yellow Group Ltd | Manufacturing | 2024 |
| Fernlow Fencing Ltd | Wholesale & retail | 2025 |
| Fernwood Day Nursery Ltd | Education | 2008 |
| Fernwood Fertility Limited | Health & social care | 2023 |
| Fernwood Reactive Repairs Limited | Administrative & support | 2016 |
| FERTES01 Limited | Administrative & support | 2022 |
| FFP Consulting Limited | Information & communication | 2015 |
| Fibre Upholstery Ltd | Other services | 2025 |
| Fiducia Business Centres Limited | Real estate | 2015 |
| Fiducia Commercial Solutions LLP | | 2014 |
| Fiducia Comprehensive Financial Planning Limited | Financial services | 2005 |
| Fiducia Group Holdings Limited | Financial services | 2023 |
| Fiducia Marketing Services Ltd | Professional & scientific | 2024 |
| Field Farm Tours Holdings Limited | Financial services | 2025 |
| Field Farm Tours Ltd | Administrative & support | 2010 |
| FIEXR2I01 Limited | Administrative & support | 2023 |
| FIG and Wolf Limited | Other services | 2022 |
| Filex Trans Ltd | Transport & logistics | 2013 |
| Filmax Logistics Ltd | Transport & logistics | 2025 |
| FILTER8 Limited | Professional & scientific | 2024 |
| Finance 2 Business Limited | Financial services | 2013 |
| Financefinity Limited | Extraterritorial | 2022 |
| Fine-Align Engineering Ltd | Professional & scientific | 2018 |
| Fine-Align Limited | Professional & scientific | 1993 |
| Finer Perceptions Limited | Professional & scientific | 2019 |
| Finisa Vault Ltd | Information & communication | 2024 |
| Firewall Limited | Construction | 2006 |
| Firnox Ltd | Information & communication | 2021 |
| First Leaf Limited | Financial services | 2015 |
| Fishers Electrical Discount Limited | Wholesale & retail | 1993 |
| Fiskerton Village Shop Limited | Wholesale & retail | 2003 |
| FIT3LEV8 Ltd | Transport & logistics | 2025 |
| Fitness Industry Accountants Limited | Professional & scientific | 2011 |
| Fitness Industry Training Limited | Education | 2011 |
| Fitstaffuk Limited | Other services | 2024 |
| Five Bells Inn Limited | Hospitality | 2002 |
| Five Percent Property Limited | Real estate | 2018 |
| Fiveandlimeinns Limited | Hospitality | 2020 |
| Fixcategorycars Ltd | Wholesale & retail | 2024 |
| FJJ Lettings Ltd | Real estate | 2020 |
| Fjkm Investments Ltd | Financial services | 2025 |
| Flails Direct Limited | Professional & scientific | 2002 |
| Flamingo Auto Services (Worksop) Limited | Wholesale & retail | 2015 |
| Flashpoint Engineering Ltd | Professional & scientific | 2026 |
| Flat Pack Party Ltd | Professional & scientific | 2020 |
| Fleetmac Limited | Real estate | 2025 |
| Flexcom Systems Limited | Information & communication | 2011 |
| Flintham & District Agricultural Society Limited | Other services | 2008 |
| Flintham Farms Limited | Agriculture & fishing | 2025 |
| FLO Ventures Ltd | Real estate | 2018 |
| Flo-Tech Consulting Limited | Information & communication | 2022 |
| Flourish Psychological Services Limited | Health & social care | 2017 |
| Flutelopes Ltd | Manufacturing | 2019 |
| Flying Keys 2020 Limited | Real estate | 2022 |
| Flying Lizard Designs Ltd | Professional & scientific | 2014 |
| FMD OHS Consultancy Ltd | Professional & scientific | 2023 |
| Fmub Medical Ltd | Health & social care | 2022 |
| Focus Management for Business Ltd. | Education | 1999 |
| Folly Fields Pet Crematorium Ltd | Other services | 2022 |
| Fomalg Limited | Financial services | 2025 |
| Food @ the Willow Ltd | Hospitality | 2026 |
| Foodman Innovations Ltd | Other services | 2024 |
| Fordfoodtech Limited | Manufacturing | 2022 |
| Forebear Services Ltd | Administrative & support | 2021 |
| Forest Events Ltd | Hospitality | 2018 |
| Formulr Marketing Ltd | Professional & scientific | 2026 |
| Formyx Limited | Wholesale & retail | 2025 |
| Forsaken Lands Larp Ltd | Administrative & support | 2026 |
| Fort Property Maintenance Ltd | Real estate | 2020 |
| Forth Construction Solutions Ltd | Construction | 2015 |
| Fortune Close (Kneesall) Limited | Households | 2022 |
| Forty SIX Investments Limited | Real estate | 2024 |
| Fosse Bookkeeping & Accounting Ltd | Professional & scientific | 2016 |
| Foston Developments Limited | Construction | 2025 |
| Founded Property Limited | Real estate | 2018 |
| Foundry Miniatures Limited | Manufacturing | 1983 |
| Four One 9INE Ltd | Professional & scientific | 2022 |
| Fourguysuk Ltd | Hospitality | 2026 |
| Foxtrot & Oscar Limited | Hospitality | 2019 |
| Fozcabs Newark Taxi Ltd | Transport & logistics | 2014 |
| FPW Properties Ltd | Real estate | 2025 |