| Fibre Fusioned Services Limited | Manufacturing | 2024 |
| Fibre Splice Solutions Limited | Information & communication | 2016 |
| Fidel Ltd | Wholesale & retail | 2026 |
| Fiducia Pro Ltd | Professional & scientific | 2025 |
| Field Fresh Ltd | Wholesale & retail | 2020 |
| Field OFC Juniors CIC | Arts & recreation | 2026 |
| Field OFC Limited | Arts & recreation | 2025 |
| Field Sports & Social Club Ltd | Hospitality | 2024 |
| Fieldhead Limited | Hospitality | 2021 |
| Fieldon Bridge Developments 2 Ltd | Real estate | 2017 |
| Fieldon Bridge Developments Limited | Real estate | 2015 |
| Fields of Unity Ltd | Education | 2025 |
| Fife Retail Services Ltd | Administrative & support | 2017 |
| Fiftyfifty Quiet Habitation Limited | Financial services | 2025 |
| Figaro Hair Ltd | Other services | 2023 |
| Figaro Salon Limited | Other services | 2023 |
| Figsfam Enterprises Ltd | Transport & logistics | 2024 |
| Fika Coffeehouse Ltd | Hospitality | 2025 |
| Filamentive Limited | Wholesale & retail | 2015 |
| FIM Database Consulting Limited | Information & communication | 2024 |
| Final Choice Ltd | Wholesale & retail | 2024 |
| Final Touch Paintings Limited | Construction | 2024 |
| Finance Line Ltd | Financial services | 2019 |
| Financial Advice Line Ltd | Professional & scientific | 2025 |
| Financier Consulting & Trading Ltd | Financial services | 2024 |
| Find My Family Ltd | Other services | 2023 |
| Findlay Care Ltd | Health & social care | 2026 |
| Fine Art Graphics Limited | Extraterritorial | 1901 |
| Fine Food Supplies Ltd | Manufacturing | 2024 |
| Fine Furnishing Collective Ltd | Manufacturing | 2023 |
| Fine Pizza Ltd | Hospitality | 2015 |
| Fineline Construction Ltd | Construction | 2017 |
| Fineline Eyecare (UK) Limited | Administrative & support | 2013 |
| Finesse Bakery Limited | Manufacturing | 2020 |
| Fingreen Holdings Limited | Professional & scientific | 2013 |
| Finishingparts Limited | Manufacturing | 2021 |
| Finn Associates (Businesscare) Limited | Professional & scientific | 2005 |
| Finpro Accounting Services Limited | Professional & scientific | 2023 |
| Finpromach Ltd | Manufacturing | 2018 |
| Fiobello Ltd | Wholesale & retail | 2020 |
| Fiora Atelier Pâtisserie Ltd | Manufacturing | 2025 |
| Firasa Investments Limited | Financial services | 2014 |
| Fire Investigation Solutions Limited | Administrative & support | 2011 |
| Fire Investigations (UK) LLP | | 2011 |
| Fire Precautions Limited | Professional & scientific | 2006 |
| Fire Protection Inspectors Ltd | Construction | 2018 |
| Firebird Homes Limited | Construction | 2004 |
| Firecommand Limited | Professional & scientific | 2013 |
| Fires and Surrounds Co.Uk Limited | Wholesale & retail | 2008 |
| Firework Store Bradford Limited | Wholesale & retail | 2025 |
| Firsdell Ltd | Construction | 2011 |
| First AID 4 Events Ltd | Health & social care | 2017 |
| First Call Home Services Ltd | Wholesale & retail | 2016 |
| First Call Mortgage Solutions Limited | Financial services | 2018 |
| First Choice Naturally Ltd | Wholesale & retail | 2015 |
| First Choice Servicez Ltd | Administrative & support | 2025 |
| First Class Munch Limited | Hospitality | 2022 |
| First Dental Services Ltd | Health & social care | 2017 |
| First Forester Solutions Ltd | Wholesale & retail | 2025 |
| First Healthcare Limited | Health & social care | 2012 |
| First Light Children’S Care Ltd | Health & social care | 2023 |
| First Line 1 C Ltd | Transport & logistics | 2025 |
| First Locum Ltd | Wholesale & retail | 2022 |
| First Medical Care Limited | Health & social care | 2024 |
| First Medical Training Limited | Health & social care | 2013 |
| First on Scene Training Limited | Education | 2008 |
| First Rehab Limited | Health & social care | 2016 |
| First Response Emergency Care Limited | Education | 2020 |
| First Solution Money Transfer Limited | Administrative & support | 2007 |
| First Stop Wholesalers Ltd | Wholesale & retail | 2016 |
| First Supply Chain Ltd | Professional & scientific | 2021 |
| First Transport WM Ltd | Transport & logistics | 2026 |
| First Tuition Ltd | Education | 2022 |
| First Tutors Ltd | Education | 2024 |
| First Wyke Pizzaria Ltd | Hospitality | 2023 |
| Firth Brothers (Shepley) Limited | | 1939 |
| Firth Civil Engineering Ltd | Construction | 2014 |
| FIRTH1 Ltd | Health & social care | 2023 |
| Firth`S Quality Foods Limited | Wholesale & retail | 2008 |
| Fish ALL Cars Ltd | Wholesale & retail | 2022 |
| Fish OUT Leeds Limited | Hospitality | 2025 |
| Fitbody Online Ltd | Arts & recreation | 2017 |
| Fitiso Ltd | Wholesale & retail | 2020 |
| Fitness Freedom Ltd | Arts & recreation | 2025 |
| Fitness Health Wellbeing Hub CIC | Education | 2024 |
| Fitness Mama Ltd | Health & social care | 2019 |
| Fitnesstripleh Ltd | Wholesale & retail | 2026 |
| Fitnest Studios Ltd | Arts & recreation | 2026 |
| Fits Engineering Ltd | Professional & scientific | 2016 |
| Fitter-Bodies Ltd | Arts & recreation | 2016 |
| Fitz (Bradford) Limited | Real estate | 2023 |
| Fitzwilliam Service Station Ltd | Wholesale & retail | 2015 |
| Five Brothers Asset Management Ltd | Real estate | 2024 |
| Five Mobility Holdings Limited | Administrative & support | 2023 |
| Five Mobility Ltd | Administrative & support | 2019 |
| Five Rise Holdings Limited | Financial services | 2024 |
| Five Rivers Designs Ltd | Information & communication | 2024 |
| Five Star Fresh Ltd | Wholesale & retail | 2022 |
| Five Star Hair Limited | Wholesale & retail | 2014 |
| Five Star Lets Ltd | Households | 2026 |