| FREIGHT28 Limited | Transport & logistics | 2025 |
| FREIGHT2GO Ltd | Transport & logistics | 2012 |
| Freitas Paris Ltd | Wholesale & retail | 2026 |
| Fremantle Holdings Ltd | Financial services | 2023 |
| French Sole Group Limited | Wholesale & retail | 2019 |
| Frenchie Kingdom Ltd | Wholesale & retail | 2025 |
| Frenco Ltd | Wholesale & retail | 2020 |
| Frenova Ltd | Other services | 2025 |
| Freo Financial Solutions Limited | Financial services | 2024 |
| Frequency Hearing Ltd | Wholesale & retail | 2018 |
| Fresco Deli Ltd | Hospitality | 2026 |
| Fresh & Blessed Limited | Manufacturing | 2022 |
| Fresh Bacon Company Limited | Real estate | 1995 |
| Fresh Business Thinking Events Ltd | Administrative & support | 2019 |
| Fresh Cart Limited | Wholesale & retail | 2025 |
| Fresh Choice Supermarket UK Ltd | Wholesale & retail | 2019 |
| Fresh Choice UK Ltd | Wholesale & retail | 2026 |
| Fresh Construction Ltd | Professional & scientific | 2019 |
| Fresh Dairyproduct Limited | Wholesale & retail | 2024 |
| Fresh Floors Ltd | Construction | 2025 |
| Fresh Flow Ltd | Wholesale & retail | 2021 |
| Fresh Foundations Ltd | Construction | 2025 |
| Fresh Global Ltd | Wholesale & retail | 2024 |
| Fresh Graphics Ltd | Professional & scientific | 2012 |
| Fresh JAR Ltd | Wholesale & retail | 2023 |
| Fresh Laundry Lounge Ltd | Other services | 2026 |
| Fresh N Fetch Ltd | Wholesale & retail | 2024 |
| Fresh OUT the Gulag Limited | Manufacturing | 2020 |
| Fresh PAL Ltd | Wholesale & retail | 2018 |
| Fresh Shoot Studios Ltd | Professional & scientific | 2022 |
| Fresh Thinking Group (Europe) Limited | Financial services | 2021 |
| Fresh Thinking Group (Global) Limited | Financial services | 2021 |
| Freshfiels Larder Ltd | Wholesale & retail | 2017 |
| Freshfindz Ltd | Wholesale & retail | 2025 |
| Freshlot Group PC | | 2019 |
| Freshly Grown Limited | Wholesale & retail | 2022 |
| Freshplan Limited | Households | 1976 |
| Freshwater (UK Regions) Limited | Professional & scientific | 1987 |
| Freshwater UK Limited | Professional & scientific | 2000 |
| Freshwave Produce Ltd | Wholesale & retail | 2026 |
| Freshworld Mart Limited | Wholesale & retail | 2025 |
| Fressa Solutions Ltd | Wholesale & retail | 2021 |
| Frevantira Ltd | Education | 2025 |
| Freycoop Properties Limited | Real estate | 2018 |
| Frezzh Limited | Information & communication | 2021 |
| FRH 124 Limited | Hospitality | 2024 |
| Friday Homes Limited | Real estate | 2021 |
| Friend's Star Limited | Hospitality | 2013 |
| Friendly CAB Ltd | Transport & logistics | 2018 |
| Friendly Care Network CIC | Administrative & support | 2026 |
| Friends ARE Always Welcomed Limited | Information & communication | 2017 |
| Friends Electric Ltd | Hospitality | 2026 |
| Friends of Cymru Sickle Cell and Thalassaemia C.I.C. | Education | 2021 |
| Friends of Pedal Power Project Ltd | Hospitality | 2002 |
| Friends of Taff Bargoed Park Ltd | Arts & recreation | 2010 |
| Frigga Ltd | Financial services | 2023 |
| Frimstone Consulting Ltd | Administrative & support | 2017 |
| Frisla Solutions Ltd | Administrative & support | 2021 |
| Fristonmoor Holdings Limited | Administrative & support | 2019 |
| Friswell Films Limited | Administrative & support | 2014 |
| Friventy Services Ltd | Other services | 2019 |
| Frixos Ltd | Wholesale & retail | 2017 |
| Frog-E Ltd | Education | 2021 |
| Frol Explorer Ltd | Manufacturing | 2018 |
| From M'S Kitchen Ltd | Hospitality | 2020 |
| From Mars Ltd | Arts & recreation | 2020 |
| Fromo Limited | Manufacturing | 2019 |
| Fronimo Solutions Ltd | Administrative & support | 2020 |
| Fronsacdirect Limited | Wholesale & retail | 1998 |
| Fronsacwines Limited | Wholesale & retail | 1998 |
| Front Door Estates Limited | Real estate | 2015 |
| Front Foot Pathways Ltd | Education | 2025 |
| Front ROW Sports Events Ltd | Arts & recreation | 2016 |
| Frontagent Limited | Professional & scientific | 1991 |
| Frontal Lobe Events LLP | | 2018 |
| Frontier Contractors Limited | Construction | 2026 |
| Frontier Developments (N.W.) Ltd | Construction | 2018 |
| Frontier Structured Resources Ltd | Wholesale & retail | 2026 |
| Frontier Tattoo Company Ltd | Other services | 2020 |
| Frontier Tattoo Parlour Limited | Arts & recreation | 2013 |
| Frontix Ltd | Information & communication | 2025 |
| Frontline Eco Ltd | Wholesale & retail | 2025 |
| Frontline Solutions 2018 Ltd | Administrative & support | 2018 |
| Frontsolid Property Management Limited | Households | 1990 |
| Frontwater 78 Limited | Professional & scientific | 2012 |
| Froomdoc Limited | Health & social care | 2017 |
| Frost Consultancy Limited | Other services | 2018 |
| Frost Contracting Limited | Professional & scientific | 2016 |
| Frost Point Refrigeration & AC Ltd | Construction | 2026 |
| Frost Project Services Ltd | Construction | 2026 |
| Frost River Retail Ltd | Wholesale & retail | 2025 |
| FROST9 Studios Ltd | Information & communication | 2016 |
| Frostburn Ltd | Real estate | 2017 |
| Frosted Ice Inc Limited | Arts & recreation | 2019 |
| Frostvioletsky Ltd | Manufacturing | 2020 |
| Frovina Ltd | Wholesale & retail | 2026 |
| Frozen Lemon Ltd | Wholesale & retail | 2020 |
| FRP Automotive and Design Limited | Manufacturing | 2018 |
| FRP Consulting Limited | Professional & scientific | 2024 |
| FRS Refrigeration Ltd | Manufacturing | 2014 |