| Firasah Publications Ltd | Information & communication | 2023 |
| Fire Fighting Technologies Limited | Manufacturing | 2001 |
| Fire Investments Ltd | Financial services | 2022 |
| Fire Protection First Limited | Public administration | 2025 |
| Fire Risk Assessor Preston Ltd | Professional & scientific | 2026 |
| Fire Strategy Services Limited | Public administration | 2019 |
| Fireconsult Limited | Professional & scientific | 2002 |
| Fired UP GAS Services Limited | Construction | 2006 |
| Firefly Audio Visual Solutions Limited | Professional & scientific | 2005 |
| Firefly AV Limited | Information & communication | 2016 |
| Firehazresearch Ltd | Professional & scientific | 2024 |
| Firehouse Grill Preston Ltd | Hospitality | 2025 |
| Firenze Homes Ltd | Real estate | 2025 |
| Fireside Inns & Taverns Ltd | Hospitality | 2012 |
| Firesleeve Limited | Professional & scientific | 2006 |
| Firetech Consulting Limited | Administrative & support | 2018 |
| Firetech Design Limited | Professional & scientific | 2011 |
| Firetech Holdings Limited | Financial services | 2021 |
| Fireworks Shop Limited | Wholesale & retail | 2012 |
| Firs Lane Ltd | Real estate | 2021 |
| First Call Locksmiths Limited | Administrative & support | 2019 |
| First Call Motors Limited | Wholesale & retail | 2019 |
| First Choice Beauty Limited | Other services | 2026 |
| First Choice Travel Limited | Wholesale & retail | 2017 |
| First City Trading Limited | Wholesale & retail | 2017 |
| First Class Finishes Ltd | Construction | 2025 |
| First Class Metals PLC | Mining & quarrying | 2021 |
| First FIX Solutions Ltd | Construction | 2025 |
| First International Enterprises Ltd | Wholesale & retail | 2018 |
| First Kick CIC | Education | 2024 |
| First Kick Nursery Ltd | Education | 2023 |
| First Medical Equipment Limited | Wholesale & retail | 2002 |
| First Stop Car Sales Ltd | Wholesale & retail | 2019 |
| First Tijaarah Ltd | Wholesale & retail | 2026 |
| First Touch Digital Ltd | Professional & scientific | 2020 |
| First Trace Group Limited | Financial services | 2018 |
| First Trace Heating Direct Limited | Construction | 1998 |
| First Trust Management Limited | Professional & scientific | 2024 |
| First Watch LLP | | 2023 |
| First WE Lift Club Ltd | Arts & recreation | 2023 |
| First-Class Developments Ltd | Real estate | 2024 |
| First-Class Stays Ltd | Real estate | 2026 |
| Firstgol Ltd | Wholesale & retail | 2025 |
| Firwood Farm Eggs Ltd | Agriculture & fishing | 2007 |
| FIS Group Holding Ltd | Financial services | 2022 |
| Fish Electrical (NW) Limited | Construction | 2013 |
| Fish Engineering Solutions Limited | Professional & scientific | 2015 |
| Fisher & Fisher Consultants Limited | Professional & scientific | 2025 |
| Fisher Building Ltd | Construction | 2009 |
| Fisher Renewable Solutions Limited | Construction | 2022 |
| Fisher Roof Limited | Construction | 2014 |
| Fisher Wrathall Surveyors Limited | Professional & scientific | 2020 |
| Fishergate Court Management Company Limited | Real estate | 1989 |
| Fishergate Preston Limited | Other services | 2021 |
| Fishergate Properties Limited | Hospitality | 2016 |
| Fishergate Residences Ltd | Real estate | 2025 |
| Fisherman PVT Ltd | Wholesale & retail | 2026 |
| Fishers Electrical Services Limited | Construction | 2014 |
| Fistral Utility Services Ltd | Professional & scientific | 2015 |
| Fit 2 Drive Medicals Ltd | Health & social care | 2016 |
| Fit Butter Foods Ltd | Manufacturing | 2020 |
| Fit Football Limited | Other services | 2019 |
| Fit Forward Ltd | Health & social care | 2020 |
| FIT4FLYING Limited | Health & social care | 2014 |
| Fitbiotics Limited | Wholesale & retail | 2019 |
| Fitchett Proll Dance Limited | Education | 2003 |
| Fite CLO Ltd | Wholesale & retail | 2026 |
| Fitness Plus Academy Ltd | Arts & recreation | 2025 |
| Fitness Warehouse Limited | Wholesale & retail | 1997 |
| Five Star UK Ecommerce Ltd | Wholesale & retail | 2021 |
| Fivemoons Ltd | Wholesale & retail | 2021 |
| Fiveshower Limited | Construction | 1998 |
| Fivetees Training Ltd | Professional & scientific | 2021 |
| FIX Coffee Curtain Road Ltd | Hospitality | 2011 |
| FIX365 Ltd | Construction | 2019 |
| Fixed 4 Time Limited | Real estate | 2018 |
| Fixuup Ltd | Construction | 2025 |
| Fizshop Ltd | Wholesale & retail | 2021 |
| FJ & J Wrathall Holdings Limited | Real estate | 2024 |
| FJ Designs Ltd | Arts & recreation | 2015 |
| FJ Sports Performance Ltd | Health & social care | 2025 |
| FJE Consulting Ltd | Professional & scientific | 2019 |
| FJM Contracts Limited | Construction | 2012 |
| FJW Logistics Limited | Transport & logistics | 2016 |
| FK Cafe Ltd | Hospitality | 2025 |
| FK Tiles Ltd | Manufacturing | 2026 |
| FL Building and Maintenance Ltd | Construction | 2025 |
| Flame Urban Spa Ltd | Other services | 2018 |
| Flaming Good Food Ltd | Wholesale & retail | 2024 |
| Flamingo Cafe Ltd | Hospitality | 2024 |
| Flanagan Sales Limited | Extraterritorial | 2012 |
| Flash Media Ltd | Arts & recreation | 2013 |
| Flashline Limited | Wholesale & retail | 2025 |
| Flashline Logistics Ltd | Transport & logistics | 2018 |
| Flatpad Limited | Real estate | 2022 |
| Flaverco Limited | Manufacturing | 2011 |
| Flavour & FUR Ltd | Wholesale & retail | 2026 |
| Flavour Food Marketing Ltd | Professional & scientific | 2016 |
| Flavourz Ltd | Wholesale & retail | 2023 |
| Fleet Edge Logistics Ltd | Transport & logistics | 2025 |