| Fahran Younas Ltd | Professional & scientific | 2016 |
| Fairground Studio Ltd | Arts & recreation | 2016 |
| Fairhall Asset Management Limited | Financial services | 1997 |
| Fairhall Residents Association Limited | Real estate | 1995 |
| Fairthorne Reigate Limited | Real estate | 2024 |
| Fairview Chinese Ltd | Hospitality | 2025 |
| Falcon Cabs Ltd | Transport & logistics | 2022 |
| Fast Thought Limited | Professional & scientific | 2016 |
| FAT Joes Desserts Ltd | Hospitality | 2021 |
| FAT Joes Gourmet Burgers Ltd | Hospitality | 2020 |
| FAT Joes Pizza Ltd | Hospitality | 2021 |
| FAT KEI Limited | Hospitality | 2014 |
| Faversham Care Company Ltd | Construction | 2023 |
| FBS Security Limited | Administrative & support | 2024 |
| FCD Ranmore Limited | Financial services | 2020 |
| FCL Properties Limited | Hospitality | 2015 |
| FDM Cars Ltd | Wholesale & retail | 2024 |
| FE MIS Consulting Ltd | Information & communication | 2025 |
| Felchris Ltd | Other services | 2020 |
| Fenwick Property Services Limited | Real estate | 2016 |
| Fernlea Management Co (Salcombe) Limited | Extraterritorial | 2015 |
| Fernleigh Orthopaedics Ltd | Health & social care | 2026 |
| Fervidus White Limited | Real estate | 1999 |
| Fichas Media Ltd | Information & communication | 2019 |
| Fidgetbottom Limited | Wholesale & retail | 2022 |
| Field & Sons (BHS) Limited | Real estate | 2009 |
| Field & Sons (Estate Management) Limited | Real estate | 2002 |
| Field Consultancy Limited | Information & communication | 2003 |
| Fieldhigh Investments Ltd | Real estate | 2016 |
| FIG & Clove Property Limited | Construction | 2024 |
| Fight OR Flight Group CIC | Public administration | 2024 |
| Figjam Consulting Ltd | Professional & scientific | 2017 |
| Fileexpert Document Management Limited | Information & communication | 2005 |
| Financial & Strategic Management Limited | Professional & scientific | 1998 |
| Financial Black Box Ltd | Financial services | 2022 |
| Finders Keepers TCG Limited | Wholesale & retail | 2025 |
| Finest Finish Carpentry Ltd | Manufacturing | 2018 |
| Finlay Britton Limited | Arts & recreation | 2017 |
| Finnet International Limited | Information & communication | 2017 |
| Finney UK Limited | Construction | 2004 |
| Firechecked Limited | Public administration | 2025 |
| First Asset Finance (UK) Ltd | Financial services | 2001 |
| First Class Nails Ltd | Other services | 2026 |
| First in Care Homes Ltd | Health & social care | 2019 |
| First in Care Services Ltd | Health & social care | 2014 |
| First Mental Health Awareness Training Ltd | Education | 2020 |
| First Wave Cyber Ltd | Information & communication | 2024 |
| Firstforlocks Limited | Professional & scientific | 2011 |
| Fish Hook HR Limited | Professional & scientific | 2008 |
| Fitness Management Limited | Arts & recreation | 2023 |
| Five Bar Gate Cottages Ltd | Hospitality | 2017 |
| Five Hole Investments Limited | Real estate | 2018 |
| Five Spice Ltd | Hospitality | 2020 |
| Fixly Services Limited | Construction | 2026 |
| Flanchford Farm Limited | Extraterritorial | 2015 |
| Flanchford Property Consulting Limited | Real estate | 2017 |
| Flawless Decorating Ltd | Construction | 2022 |
| Flawless Fashion Consultancy Limited | Wholesale & retail | 2014 |
| Flick Schofield Limited | Professional & scientific | 2009 |
| Flint Outsourcing Limited | Construction | 2023 |
| Flintan Property Services Ltd | Construction | 2024 |
| Flossys Cleaning Company Surrey Limited | Administrative & support | 2025 |
| Flow Online Ltd | Information & communication | 2019 |
| Flowplus Ltd | Professional & scientific | 2020 |
| Flyhigh Finance Ltd | Professional & scientific | 2017 |
| Flyvue Ltd | Administrative & support | 2012 |
| Focus Abroad Limited | Other services | 2014 |
| Focus Property Consultancy Limited | Administrative & support | 2011 |
| Focus Travel & Event Management Limited | Administrative & support | 2013 |
| Fogbow Limited | Professional & scientific | 2010 |
| Follaine Llys Ltd | Real estate | 2021 |
| Folly Magazine CIC | Information & communication | 2025 |
| FOOTBALL4KIDS Limited | Arts & recreation | 2018 |
| Footprint Kids Ltd | Wholesale & retail | 2025 |
| Footzone Limited | Health & social care | 2003 |
| FOR Eyes Only Ltd | Manufacturing | 2026 |
| Forever Young Fitness Limited | Health & social care | 2003 |
| Formjet Innovations Limited | Information & communication | 2001 |
| Forms (4MS) Construction Limited | Construction | 2023 |
| Formula Land (Alderbury) Limited | Real estate | 2019 |
| Formula Land (Cambridge) Limited | Real estate | 2021 |
| Formula Land (Darlington) Limited | Construction | 2022 |
| Formula Land (Oldfield House) Limited | Real estate | 2022 |
| Formula Land (Polegate) Limited | Construction | 2015 |
| Fortanini Ltd | Wholesale & retail | 2015 |
| Fortune Landscapes Ltd | Administrative & support | 2020 |
| Fortune Logistics Ltd | Wholesale & retail | 2025 |
| Forty-Five Limited | Arts & recreation | 2008 |
| Forum Health Products Ltd. | Wholesale & retail | 1981 |
| Forum Products Holdings Limited | Wholesale & retail | 2008 |
| Foundry Gate (Maresfield) Management Company Limited | Households | 2025 |
| Four 23 Management Limited | Professional & scientific | 2013 |
| Four Rivers Books Ltd | Wholesale & retail | 2022 |
| Four Seasons (Horam) Management Company Limited | Households | 2019 |
| Four Seasons Flat Roofing Limited | Construction | 2016 |
| Foursquire Ltd | Health & social care | 2020 |
| Foxlydiate Limited | Real estate | 2013 |
| Framework Builders Limited | Construction | 2019 |
| Framfield RD (Highlands) Management Company Limited | Households | 2026 |
| Frank Crossley & SON (Holdings) Limited | Professional & scientific | 2018 |