| Fine Fresh Produce Limited | Wholesale & retail | 2012 |
| Fine Home Utensils Ltd | Wholesale & retail | 2026 |
| Fine Jewels Holdings Limited | Real estate | 2019 |
| Fine Jewels Limited | Wholesale & retail | 2013 |
| Fine Limited | Construction | 2001 |
| Fine Shipping Ltd | Wholesale & retail | 2025 |
| Fine Tech Ltd | Information & communication | 2018 |
| Fine Touch Painters Ltd | Construction | 2025 |
| Fine Touch Services Ltd | Professional & scientific | 2019 |
| Fine Tune Tutors Ltd | Education | 2026 |
| FINECARE247 Healthcare Ltd | Administrative & support | 2024 |
| FINECARE247 Ltd | Health & social care | 2014 |
| Fineos UK Limited | Information & communication | 1998 |
| Finepoint Management Company Limited | Households | 2015 |
| Finery Bham Ltd | Other services | 2022 |
| Finesse Catering Co. Ltd | Hospitality | 2026 |
| Finesse Chiropractic Limited | Health & social care | 2020 |
| Finesse IT Ltd | Wholesale & retail | 2017 |
| Finest Fabrication Ltd | Manufacturing | 2017 |
| Finest Fabrication Property Ltd | Real estate | 2022 |
| Finexa Accounting Ltd | Professional & scientific | 2025 |
| Fingerprint Managed Services Limited | Administrative & support | 2003 |
| Finhealth & Co LLP | | 2024 |
| Finhealth Limited | Professional & scientific | 2024 |
| Fini Properties Limited | Real estate | 2017 |
| Finimarsh Limited | Real estate | 2022 |
| Finish Architectural Ltd | Manufacturing | 1995 |
| Finish Facades Limited | Manufacturing | 2020 |
| Finish Logistics Limited | Transport & logistics | 2022 |
| Finishing Touch Alloys Limited | Wholesale & retail | 2017 |
| Finite Jewels Limited | Wholesale & retail | 2024 |
| Finiti Kitchens Ltd | Manufacturing | 2024 |
| Finitrac Europe Ltd. | Professional & scientific | 1999 |
| Finix the Wholesale Shop Ltd | Wholesale & retail | 2018 |
| Finlo Developments Ltd | Construction | 2021 |
| Finlo Engineering Ltd | Construction | 2019 |
| Finlock Finance Limited | Professional & scientific | 2019 |
| Finmere Properties Ltd | Real estate | 2018 |
| Finn Norm Builds Limited | Wholesale & retail | 2023 |
| Finness Services Ltd | Professional & scientific | 2011 |
| Finneys Wheels Limited | Education | 2018 |
| Finnigroup Limited | Administrative & support | 2020 |
| Finnshea Limited | Real estate | 2018 |
| Finny Ventures Ltd | Wholesale & retail | 2026 |
| Finstaff Ltd | Administrative & support | 2025 |
| Finsweep Limited | Information & communication | 2026 |
| Finsyscon Solutions Ltd | Professional & scientific | 2024 |
| Fintax Cars Limited | Administrative & support | 2007 |
| Fintax Ltd | Financial services | 2018 |
| Fintax Properties Limited | Construction | 2009 |
| Fintech Hub Limited | Professional & scientific | 2017 |
| Fintech Logic Ltd | Information & communication | 2025 |
| Fintech Zone Ltd | Administrative & support | 2025 |
| Fintecom Limited | Information & communication | 2021 |
| Fintyre Group Limited | Financial services | 2017 |
| Finvera Limited | Administrative & support | 2016 |
| Finvue Ltd | Financial services | 2019 |
| Finwave Accountants Ltd | Professional & scientific | 2022 |
| FIO Group Ltd | Administrative & support | 2026 |
| Fiona Elliott Limited | Professional & scientific | 2015 |
| Fiona Ritchie Consulting Ltd | Professional & scientific | 2019 |
| Fiore Investments Ltd | Real estate | 2021 |
| Fiorente Property Sourcing Ltd | Extraterritorial | 2019 |
| Fioretti Trust | Education | 2016 |
| Fipa UK Limited | Wholesale & retail | 2024 |
| Fipbhx Limited | Real estate | 2024 |
| FIR Tree Online Limited | Wholesale & retail | 2020 |
| Fira Landscape EOT Limited | Administrative & support | 2024 |
| Fira Landscape Ltd | Professional & scientific | 1992 |
| Firchrize Ltd | Transport & logistics | 2021 |
| Fircroft College of Adult Education | Education | 2023 |
| Firdirect Ltd | Wholesale & retail | 2011 |
| Fire & Light Management LP | | 2017 |
| Fire Access Security Ltd | Construction | 2013 |
| Fire and Glory Logistics Ltd | Wholesale & retail | 2024 |
| Fire and Glory Property Ltd | Real estate | 2023 |
| Fire and Medical Transport Ltd | Transport & logistics | 2023 |
| Fire and Safety Group Ltd | Public administration | 2019 |
| Fire and Safety Services Limited | Manufacturing | 2000 |
| Fire Assessment Services (UK) Ltd | Professional & scientific | 2013 |
| Fire Bitess Limited | Hospitality | 2026 |
| Fire Compliance Services Limited | Administrative & support | 2015 |
| Fire Door Inspection Specialists Ltd | Construction | 2025 |
| Fire Doors Shield Ltd | Construction | 2019 |
| Fire Fend Installations Limited | Construction | 2013 |
| Fire Kitchen Collective Ltd | Hospitality | 2026 |
| Fire on Mars Limited | Information & communication | 2011 |
| Fire Operative Limited | Construction | 2022 |
| Fire Risk Prevention Ltd | Public administration | 2026 |
| Fire Safety Managers Childrens Books Ltd | Wholesale & retail | 2019 |
| Fire Safety Managers Ltd | Professional & scientific | 2015 |
| Fire Safety Risk Assessment Limited | Public administration | 2022 |
| Fire Shield Solutions Ltd | Professional & scientific | 2025 |
| Fire Superstore Ltd | Wholesale & retail | 2025 |
| Fire Windows Direct Ltd | Manufacturing | 2022 |
| Firecrate Ltd | Wholesale & retail | 2025 |
| Firecron Limited | Information & communication | 2000 |
| Firedemon Studios Ltd | Information & communication | 2026 |
| Firefly Living Ltd | Hospitality | 2023 |
| Firefly Property Developments Limited | Professional & scientific | 1997 |