| First 4 IT Limited | Information & communication | 2003 |
| First Alliance Housing Limited | Construction | 2020 |
| First Class Learning Harrogate Ltd | Education | 2023 |
| First Drive Limited | Extraterritorial | 2011 |
| First National Plant Rental Limited | Extraterritorial | 1987 |
| First North Limited | Professional & scientific | 2025 |
| First Planning Limited | Administrative & support | 2018 |
| First Point Surveys Limited | Construction | 2010 |
| First White Cloth Hall (Leeds) Limited | Construction | 2016 |
| First Yorkshire Finance Company Limited | Real estate | 1999 |
| Firstman Associates Limited | Administrative & support | 2000 |
| Firth Timber Ltd | Wholesale & retail | 2020 |
| Fischer Stien Limited | Extraterritorial | 2026 |
| Fish R BLU Ltd | Information & communication | 2015 |
| Fishers Properties Family LLP | | 2017 |
| Fishers Properties Limited | Real estate | 2016 |
| Fitback Physiotherapy Limited | Health & social care | 2016 |
| Fitness HUT Ltd | Arts & recreation | 2021 |
| Fitness Success Obstacle Gym Limited | Arts & recreation | 2012 |
| Fitout Directions Ltd | Construction | 2021 |
| Fitouts DRY Cleaning Ltd | Other services | 2024 |
| Fitted UK Ltd | Administrative & support | 2013 |
| Fitton Holdings Limited | Financial services | 2019 |
| Fitzmaurice Productions Limited | Wholesale & retail | 2015 |
| Five Areas Limited | Information & communication | 2007 |
| Five Areas Resources Limited | Professional & scientific | 2008 |
| Five Retail Limited | Wholesale & retail | 2008 |
| Fixology (Leeds) Limited | Arts & recreation | 2024 |
| Fixology Hub Limited | Arts & recreation | 2026 |
| Fixology Physiotherapy Limited | Arts & recreation | 2026 |
| Fizzy FOX Limited | Wholesale & retail | 2020 |
| Fj-Health Limited | Real estate | 2013 |
| Fja-Health Limited | Health & social care | 2015 |
| FK Building Limited | Construction | 2020 |
| FK Resolv. Ltd | Construction | 2012 |
| FKR Group Limited | Financial services | 2026 |
| FL1NG Limited | Extraterritorial | 2020 |
| Flamin Patties Harrogate Ltd | Hospitality | 2025 |
| Flashapp Ltd | Construction | 2025 |
| Flavour Pioneers Limited | Wholesale & retail | 2025 |
| Flax Hospitality Ltd | Hospitality | 2024 |
| Fleet Couriers Limited | Transport & logistics | 2024 |
| Flesh Limited | Extraterritorial | 2025 |
| Fletchers Fabrics of Leeds Ltd | Wholesale & retail | 2017 |
| Fleuristry Ltd | Wholesale & retail | 2025 |
| Flexiflow Ltd | Wholesale & retail | 2022 |
| Flightdeck Assessors Ltd | Professional & scientific | 2026 |
| Flightheight Limited | Real estate | 2000 |
| Flighthome Properties LLP | | 2017 |
| Flint Hyde (London) Limited | Administrative & support | 2013 |
| Flint Hyde Properties Limited | Real estate | 2013 |
| Fliprecycle.Com Ltd | Administrative & support | 2018 |
| Fliptrack Limited | Information & communication | 2026 |
| Flixora for Trade Ltd | Construction | 2021 |
| FLL Investments Limited | Construction | 2022 |
| Flocques Ltd | Professional & scientific | 2012 |
| Flog ME IT Limited | Extraterritorial | 2012 |
| Floods Ferry Wind Farm Limited | Energy | 2025 |
| Florence Management Consulting Ltd | Professional & scientific | 2023 |
| Flos UK Limited | Wholesale & retail | 2009 |
| Flotech Performance Systems Ltd | Manufacturing | 2011 |
| Flotilla Group Limited | Information & communication | 2020 |
| Flow-Mon Limited | Manufacturing | 1971 |
| Flowers by Colette Limited | Wholesale & retail | 2013 |
| FLS Associates Limited | Professional & scientific | 2014 |
| FM Consult Limited | Construction | 2015 |
| FM180 Ltd | Information & communication | 2010 |
| FMD Developments Limited | Professional & scientific | 2004 |
| FMJ Plastering Limited | Construction | 2025 |
| FML Events Ltd | Administrative & support | 2026 |
| Fnpr Holdings Limited | Extraterritorial | 2006 |
| Fodel Ltd | Information & communication | 2020 |
| Fogal and Barnes Ltd | Wholesale & retail | 2020 |
| Folifi Ltd | Professional & scientific | 2024 |
| Folk Coffee House Ltd | Hospitality | 2022 |
| Folk Finders Ltd | Information & communication | 2013 |
| Follifoot House Limited | Construction | 2026 |
| Follifoot Publishing Limited | Information & communication | 2009 |
| Folly View Properties Limited | Households | 2018 |
| Fonderie Ltd | Professional & scientific | 2022 |
| Fone Point Harrogate Ltd | Wholesale & retail | 2024 |
| Food and Beverage Brands Limited | Professional & scientific | 2018 |
| Food Explorer Ltd | Wholesale & retail | 2024 |
| Food Fest Ltd | Extraterritorial | 2012 |
| Food TEC Consulting Limited | Professional & scientific | 2011 |
| Foodie Zone Limited | Hospitality | 2020 |
| Foodpod Solutions Ltd | Hospitality | 2021 |
| Fookem Hall Limited | Construction | 2015 |
| Foolish Wood Limited | Hospitality | 2020 |
| Football Facilities Management Limited | Extraterritorial | 2015 |
| Football FM Limited | Extraterritorial | 2015 |
| Footballers Facilities Management Limited | Extraterritorial | 2015 |
| Footman Tudor-Lewis Limited | Extraterritorial | 2025 |
| Footprint IT Ltd | Information & communication | 2020 |
| Foray Marketing Limited | Administrative & support | 2000 |
| Forbes FM Limited | Extraterritorial | 2026 |
| Forcepoint Overseas Limited | Information & communication | 2006 |
| Forcepoint UK Limited | Information & communication | 2000 |
| Forces Chain Ltd | Financial services | 2025 |
| Ford and Black Limited | Other services | 2025 |