| Fisher Financial Management Limited | Financial services | 2009 |
| Fit Gamer Ltd | Wholesale & retail | 2025 |
| Fitlife Physiotherapy Limited | Health & social care | 2019 |
| Fitness With Phil Limited | Arts & recreation | 2022 |
| Fitzroy Gold Limited | Other services | 2016 |
| Five Double O Ltd | Hospitality | 2016 |
| FIX IT Fast Autowork Limited | Wholesale & retail | 2019 |
| FIX Your Crack Limited | Manufacturing | 2022 |
| Fixed Cost Accounting Limited | Professional & scientific | 2018 |
| Fixed Cost Payrolls Limited | Professional & scientific | 1999 |
| Fixxcouture Ltd | Wholesale & retail | 2024 |
| FIZ Bar Ltd | Hospitality | 2024 |
| FJD 2019 Limited | Hospitality | 2019 |
| FJS Distributions Ltd | Wholesale & retail | 2025 |
| Fkas Trans Ltd | Manufacturing | 2019 |
| Fkhd Holdings Ltd | Professional & scientific | 2026 |
| Fkhd Properties Limited | Real estate | 2026 |
| FKN Gym and Supplements Ltd | Arts & recreation | 2018 |
| Flame Bros Limited | Hospitality | 2026 |
| Flame Site Services Ltd | Construction | 2024 |
| Flame Tree Property Limited | Construction | 2013 |
| Flashback Safety Solutions Ltd | Manufacturing | 2025 |
| Flashtrax Ltd | Transport & logistics | 2025 |
| Flatlinerz Ltd | Wholesale & retail | 2024 |
| Flawless Care Services Ltd | Health & social care | 2022 |
| Flawless Entertainment Ltd | Arts & recreation | 2021 |
| Flawless Outdoor Cleaning Solutions Ltd | Administrative & support | 2023 |
| Flawless Services Group Ltd | Other services | 2024 |
| Fleet Support Holdings Limited | Real estate | 2009 |
| Fleet Support Operations Limited | Other services | 1995 |
| Flewitt Technology Solutions Ltd | Information & communication | 2026 |
| Flex-Seal Couplings Limited | Extraterritorial | 2021 |
| Flexi First Class Care Ltd | Health & social care | 2018 |
| Flexipack Corrugated Packaging Ltd | Manufacturing | 2024 |
| Flexo Corrugated Packaging Ltd | Manufacturing | 2024 |
| Flexopack Boxes Limited | Manufacturing | 2025 |
| Flexopack Corrugated Packaging Ltd | Manufacturing | 2024 |
| Flexpak (UK) Ltd | Wholesale & retail | 2009 |
| Flextech Consulting Ltd | Information & communication | 2011 |
| Flip and Fresh Ltd | Administrative & support | 2026 |
| Flipping Mentoring Ltd | Education | 2023 |
| Flippingorgeous Limited | Other services | 2016 |
| FLK Solar Experts Limited | Construction | 2025 |
| Flodom Serv Ltd | Transport & logistics | 2019 |
| Floodlight Trading Limited | Wholesale & retail | 2007 |
| Floorsense (UK) Limited | Construction | 2005 |
| Florimar Ltd | Transport & logistics | 2023 |
| Florin M Trans Ltd | Transport & logistics | 2020 |
| Flourish Healthcare and Support Limited | Health & social care | 2023 |
| Flourish in the Community Limited | Health & social care | 2023 |
| Flow Refine Ltd | Arts & recreation | 2026 |
| Flow Reformer Ltd | Arts & recreation | 2025 |
| Flow Underfloor Heating Ltd | Construction | 2016 |
| Flox Creative Ltd | Wholesale & retail | 2015 |
| FLS (Yorkshire) Limited | Transport & logistics | 2016 |
| Flying Colours (Yorkshire) Limited | Wholesale & retail | 2010 |
| Flying Dragon Trading Company Limited | Administrative & support | 2015 |
| Flying Homes Limited | Other services | 2011 |
| Flyit Limited | Households | 1986 |
| Flynns Arcade Ltd | Wholesale & retail | 2019 |
| FM Tyres Limited | Wholesale & retail | 2020 |
| FOB Pipelines Ltd | Administrative & support | 2020 |
| Focal Care Ltd | Health & social care | 2011 |
| Folio Albums Limited | Manufacturing | 2005 |
| Folly Hall Plant Services Ltd | Administrative & support | 2019 |
| Food & Leisure (Northern) Limited | Real estate | 1999 |
| Food Control Systems Limited | Administrative & support | 2024 |
| Food Tech Hygiene Limited | Manufacturing | 2008 |
| Foodie Kebab Limited | Hospitality | 2026 |
| Foodiehoyland Ltd | Hospitality | 2024 |
| Foraged Home Limited | Wholesale & retail | 2025 |
| Forbes Medical Services Limited | Health & social care | 2017 |
| Ford Properties Ltd | Real estate | 2013 |
| Forest Partnerships Ltd | Real estate | 2014 |
| Forever Homes Estate Agents Ltd | Real estate | 2025 |
| Forever Roofline (Yorkshire) Limited | Construction | 2017 |
| Forge Community Partnership | Other services | 1999 |
| Forge Home Heating Limited | Construction | 2025 |
| Forge Parkside Centre | Arts & recreation | 2017 |
| Forge Property Investments Limited | Real estate | 2011 |
| Forget ME NOT Care Providers Limited | Health & social care | 2022 |
| Form Physiotherapy Ltd | Health & social care | 2025 |
| Forteviot RE Limited | Real estate | 2026 |
| Fortitude Developments Ltd | Construction | 2020 |
| Fortunato Estates Ltd | Real estate | 2025 |
| Fortus Dynamic Limited | Professional & scientific | 2024 |
| Forward Steps (Yorkshire) Limited | Education | 2012 |
| Foster Design & Research Limited | Professional & scientific | 2008 |
| Fostering Imagination CIC | Arts & recreation | 2024 |
| Fosters Bakery (Staincross) Limited | Manufacturing | 1959 |
| Foulkes Holdings EOT Limited | Financial services | 2025 |
| Foulkes Holdings Limited | Construction | 2017 |
| Foundation Plus Limited | Construction | 2015 |
| Fountain Developments & Construction Limited | Construction | 2015 |
| Four Seasons Surfacing Limited | Construction | 2012 |
| Fourdees Limited | Manufacturing | 1990 |
| Fourpointzero Consulting Limited | Information & communication | 2020 |
| Fowler Design & Build Limited | Wholesale & retail | 2007 |
| Fowlston Rigging and Lifting Limited | Construction | 2023 |
| FOX & FOX Property Consultants Limited | Professional & scientific | 2025 |