| Fresh Currys Ltd | Hospitality | 2025 |
| Fresh Evening Limited | Hospitality | 2005 |
| Fresh Food Bazar Ltd | Wholesale & retail | 2020 |
| Fresh Island Foods (Holdings) Limited | Administrative & support | 2014 |
| Fresh Island Foods Limited | Wholesale & retail | 1986 |
| Fresh Legs Holdings Ltd | Financial services | 2026 |
| Fresh Marketing Media Limited | Professional & scientific | 2022 |
| Fresh Meet CIC | Education | 2025 |
| Fresh Plus Minimarket Limited | Wholesale & retail | 2025 |
| Fresh Property (SY) Ltd | Hospitality | 2011 |
| Fresh Start Couriers Ltd | Transport & logistics | 2025 |
| Fresh Start Training Centre Ltd | Education | 2019 |
| Fresh Trims Ltd | Other services | 2023 |
| Fresheye Marketing Limited | Professional & scientific | 2005 |
| Freshgate Trust Foundation(The) | Health & social care | 1941 |
| Freshity Limited | Wholesale & retail | 2023 |
| Freshly Made Films Ltd | Information & communication | 2009 |
| Freshmans Vintage Store Limited | Wholesale & retail | 2018 |
| Freshmart (Liverpool) Ltd | Wholesale & retail | 2016 |
| Freshmart (Preston) Ltd | Wholesale & retail | 2020 |
| Freshmart Ltd | Wholesale & retail | 2015 |
| Freshway Super Mart International Ltd | Wholesale & retail | 2025 |
| Fretline Limited | Construction | 1978 |
| Friction Factory Ltd | Manufacturing | 2024 |
| Friel Services Limited | Administrative & support | 2026 |
| Friendly Animal Clinic Limited | Professional & scientific | 2019 |
| Friendly Climbing Co Ltd | Manufacturing | 2022 |
| Friendly PUB People Ltd | Hospitality | 2019 |
| Friendly Waste OIL Ltd | Water & waste | 2022 |
| Friends Capital Ltd | Financial services | 2014 |
| Friends Global Enterprises UK Ltd | Wholesale & retail | 2023 |
| Friends in High Places (Rigging Consultants) Ltd | Arts & recreation | 2014 |
| Friends of Birley Spa | Education | 2019 |
| Friends of Bishops' House | Arts & recreation | 2012 |
| Friends of Rainbow Sheff CIC | Health & social care | 2025 |
| Friends of the City of Sheffield Youth Orchestra Limited(The) | Health & social care | 1982 |
| Friends S5 Supermarket Limited | Wholesale & retail | 2023 |
| Friends' Field Ltd | Agriculture & fishing | 2015 |
| Friesday Limited | Hospitality | 2023 |
| Frikat Properties Ltd | Real estate | 2022 |
| Fringe Golf Ltd | Arts & recreation | 2024 |
| Fripp Design Limited | Manufacturing | 2005 |
| Frocks and Coats Ltd | Manufacturing | 2014 |
| Frogson Holdings Limited | Financial services | 2016 |
| Frogson Investments Limited | Real estate | 1989 |
| From Works Limited | Construction | 2017 |
| Front END North Ltd | Administrative & support | 2019 |
| Front Ideas Limited | Professional & scientific | 2003 |
| Front Room Ltd | Hospitality | 2026 |
| Frontclever Limited | Health & social care | 1990 |
| Frontier Property Maintenance Limited | Construction | 2012 |
| Frontier Services Group (UK) Limited | Construction | 2016 |
| Frontline Electrical Ltd | Construction | 2022 |
| Frontline Human Rights Limited | Professional & scientific | 2020 |
| Frontline Property Investments Ltd | Real estate | 2025 |
| Frontline Services DOT UK Limited | Construction | 2015 |
| Frootcake Ltd | Arts & recreation | 2023 |
| Frost & Stafford Developments Ltd | Real estate | 2024 |
| Frost and Stafford Estates Ltd | Real estate | 2025 |
| Frostbite Cooling Ltd | Construction | 2024 |
| Froz & Curlz Private Ltd | Manufacturing | 2020 |
| Fruit a Peel Limited | Wholesale & retail | 2021 |
| Fruit Stop Ltd | Wholesale & retail | 2023 |
| Fruveg Limited | Wholesale & retail | 2017 |
| FRYHOUSE89 Limited | Hospitality | 2025 |
| Frymaster Ltd | Hospitality | 2012 |
| FS Customz Ltd | Wholesale & retail | 2026 |
| FS Dynamics UK Limited | Professional & scientific | 2016 |
| FS Hygiene Ltd | Professional & scientific | 2020 |
| FSC Commercial Limited | Hospitality | 2011 |
| FSC Commercial Trading Limited | Hospitality | 2015 |
| FSM Properties Ltd | Real estate | 2020 |
| Fsr-Fab Security Response Ltd | Administrative & support | 2025 |
| FT Motors Limited | Wholesale & retail | 2026 |
| FTG Investments Limited | Professional & scientific | 2016 |
| FTP Profiles Ltd | Wholesale & retail | 2003 |
| FU HUA 888 Ltd | Hospitality | 2025 |
| FU Xing 888 Ltd | Hospitality | 2024 |
| Fu'An Network Technology Limited | Information & communication | 2025 |
| Fucha Industry Ltd | Professional & scientific | 2022 |
| Fudoshin Trading Ltd | Arts & recreation | 2017 |
| Fuel Catering Ltd | Wholesale & retail | 2006 |
| Fuel Power Ltd | Wholesale & retail | 2018 |
| Fuel Tank Catering Limited | Hospitality | 2025 |
| Fuggle Bunny Brew House Limited | Manufacturing | 2013 |
| Fuildinnovative Ltd | Construction | 2024 |
| Fujiwawa Cat Ltd | Wholesale & retail | 2025 |
| Fujiwawa Dog Ltd | Wholesale & retail | 2025 |
| Fujiwawa Pethouse Ltd | Wholesale & retail | 2025 |
| Fujiwawa Trading Ltd | Wholesale & retail | 2025 |
| Fukuda Denshi UK Ltd | Wholesale & retail | 2017 |
| Fulcrum Associates Business Communications Limited | | 1989 |
| Fulcrum Electricity Assets Limited | Energy | 2012 |
| Fulcrum Group Holdings Limited | Administrative & support | 1999 |
| Fulcrum Holdings UK Limited | Financial services | 2024 |
| Fulcrum Infrastructure Services Limited | Construction | 2006 |
| Fulcrum Pipelines Limited | Energy | 2006 |
| Fulcrum Utility Assets Limited | Financial services | 2018 |
| Fulcrum Utility Group Limited | Financial services | 2024 |
| Full Circle Employment Agency Limited | Administrative & support | 2011 |