| FMM Property Group Limited | Real estate | 2025 |
| Fmsa Consultancy Services Ltd | Information & communication | 2025 |
| FOB Architecture Ltd | Professional & scientific | 2013 |
| Focus Shockwave Clinic Limited | Health & social care | 2024 |
| Foilcycle Ltd | Water & waste | 2024 |
| Foodservice Design Solutions Ltd | Professional & scientific | 2024 |
| Foolproof Proofreading & Editing Ltd | Professional & scientific | 2011 |
| Football Consultancy Ltd | Professional & scientific | 2020 |
| Footicubs Ltd | Education | 2020 |
| FOR Locks Sake Ltd | Wholesale & retail | 2021 |
| FOR Paws Cheshire Limited | Other services | 2022 |
| Force 8 Logistics Ltd | Transport & logistics | 2021 |
| FORCE2CLEAN Limited | Administrative & support | 2016 |
| Forde PUB Company Ltd | Hospitality | 2023 |
| Fore Golf Chester Limited | Wholesale & retail | 2012 |
| Foregate Garage Ltd | Wholesale & retail | 2016 |
| Foregate Lombard House Ltd | Hospitality | 2020 |
| Foregate Media Ltd | Wholesale & retail | 2025 |
| Foregate Rentals Ltd | Real estate | 2021 |
| Foregate Street Residents Management Company Limited | Households | 2001 |
| Forest Brow (Management Company) Limited | Real estate | 2012 |
| Forest City Projects C.I.C. | Administrative & support | 2019 |
| Forest Holidays Limited | Administrative & support | 2012 |
| Forest Lodge Properties Limited | Real estate | 2017 |
| Forest Rise Management Company (Mouldsworth) Limited | Households | 2013 |
| Forestry Resource Ltd | Real estate | 2013 |
| Foretold Ltd | Administrative & support | 2019 |
| Forge Holiday Group Ltd | Financial services | 2019 |
| Forma Living Ltd | Professional & scientific | 2025 |
| Formsafe Systems Limited | Extraterritorial | 2019 |
| Formula Flooring Limited | Wholesale & retail | 2021 |
| Forstoo Ltd | Information & communication | 2024 |
| Fort Cottages Limited | Other services | 2009 |
| Forte (North West) Limited | Other services | 2007 |
| Forte's (Wales) Limited | Real estate | 1994 |
| Forthright Finance Limited | Financial services | 1972 |
| Fortisway Limited | Administrative & support | 1996 |
| Fortitude Coaching Academy Ltd | Education | 2024 |
| Fortress Wills & Estates Ltd | Professional & scientific | 2026 |
| Fortuna Hotels Ltd | Hospitality | 2024 |
| Fortuna Money Ltd | Information & communication | 2025 |
| Fortus Properties Limited | Real estate | 2010 |
| Forward Building Solutions Ltd | Construction | 2025 |
| Forward Steps Animal Physiotherapy Ltd | Professional & scientific | 2019 |
| Foster & MAY Limited | Administrative & support | 2024 |
| Foster & Moloney Developments Ltd | Construction | 2022 |
| Foster Care Matters Ltd | Health & social care | 2023 |
| Foulkes Financial Services Ltd | Professional & scientific | 2023 |
| Foundry Supported Living Limited | Real estate | 2026 |
| Fountain Accountancy Limited | Professional & scientific | 1996 |
| Fountain Investments UK | | 1998 |
| Fountains Property Management Ltd | Health & social care | 2014 |
| Four 3 Eight Designs Limited | Manufacturing | 2014 |
| Four Amiigo Ltd | Hospitality | 2026 |
| Four Quarters Farming Ltd | Agriculture & fishing | 2023 |
| Four Seasons Property Group Ltd | Construction | 2022 |
| Fourth Dimensional Aerospace UK Limited | Financial services | 2026 |
| Fourth Leaf Ltd | Professional & scientific | 2024 |
| FOX and Barrel Ltd | Hospitality | 2008 |
| FOX Commercial Properties (FCP) Limited | Real estate | 2006 |
| FOX Energy Ltd | Construction | 2019 |
| FOX Leisure (Exeter) Limited | Real estate | 1991 |
| Foxes Walk Management Company Limited | Households | 2019 |
| Foxx Spectrum Limited | Other services | 2002 |
| Foxxy Foods Ltd | Hospitality | 2025 |
| Foyle Consulting Limited | Professional & scientific | 2023 |
| Fozz Property Ltd | Real estate | 2025 |
| FR Kennedy & SON Limited | Wholesale & retail | 2022 |
| Fractured Scty Ltd | Other services | 2018 |
| Fraen Electric Ltd | Construction | 2025 |
| Frakes Consulting Ltd | Construction | 2024 |
| Francesca Holland Consulting Ltd. | Information & communication | 2011 |
| Francis and Gale Catering Ltd | Hospitality | 2024 |
| Frankby Developments Ltd. | Real estate | 2018 |
| Frankland (Sussex) Limited | Wholesale & retail | 2024 |
| Franklin Bellnikoff Travel Limited | Administrative & support | 2021 |
| Franzee Limited | Real estate | 2022 |
| Fraser Brookes Limited | Health & social care | 2008 |
| Fraser Landscapers & Growers Limited | Administrative & support | 1997 |
| Freaky Shakes (Failsworth) Ltd | Wholesale & retail | 2018 |
| Freaky Shakes (Glossop) Limited | Hospitality | 2019 |
| Free Spirit Estates Limited | Real estate | 2006 |
| Freedom Media Ltd | Education | 2015 |
| Freeko Ltd | Hospitality | 2018 |
| Freeman Jones Legal Ltd | Professional & scientific | 2017 |
| Freeman Toone Consulting Ltd | Professional & scientific | 2018 |
| Freemasons' Hall (Chester) Limited | Other services | 1909 |
| Fresh Car Ltd | Wholesale & retail | 2024 |
| Fresh Ironing & Cleaning Ltd | Administrative & support | 2023 |
| Fresh Pots Food House Ltd | Hospitality | 2022 |
| Fresh Streams Network Ltd | Other services | 1980 |
| Freshsocks Media Ltd | Information & communication | 2016 |
| Friars Hall Property Ltd | Other services | 2023 |
| Friars House Freehold Limited | Households | 2023 |
| Friars House RTM Company Ltd | Households | 2017 |
| Friarsgate (Reading) Limited | Extraterritorial | 2005 |
| Friarsgate Developments Limited | Professional & scientific | 1940 |
| Fried Delight Ltd | Hospitality | 2023 |
| Frodsham and Mitchell Limited | Administrative & support | 2021 |
| Frodsham Caravans Limited | Hospitality | 1965 |