| Fincro Global UK Ltd | Wholesale & retail | 2024 |
| Fincy Tours Limited | Administrative & support | 2025 |
| Find & Rank Ltd | Information & communication | 2025 |
| Find AZ (UK) Ltd | Information & communication | 2009 |
| Find Global Services Ltd | Hospitality | 2024 |
| Find Long Limited | Wholesale & retail | 2023 |
| Find ME Funding Ltd | Administrative & support | 2019 |
| Find My Reach Ltd | Professional & scientific | 2019 |
| Find That Home Ltd | Real estate | 2024 |
| Find Your Instructor Platform Ltd | Wholesale & retail | 2026 |
| Findalet.Net Ltd | Real estate | 2005 |
| Findata Consultancy Ltd | Information & communication | 2020 |
| Finding Local Businesses Ltd | Professional & scientific | 2015 |
| Findlanc Ltd | Information & communication | 2026 |
| Findomestic Ltd | Information & communication | 2012 |
| Fine & Traders Limited | Wholesale & retail | 2025 |
| Fine Clothing Limited | Wholesale & retail | 2022 |
| Fine Craft Carpenters Ltd | Construction | 2019 |
| Fine Dining & Catering Limited | Hospitality | 2013 |
| Fine Luxury International Property Limited | Professional & scientific | 2026 |
| Fine Luxury Property Limited | Real estate | 2016 |
| Fine Stone Ceylon Ltd | Information & communication | 2022 |
| Fine Wines Direct UK Limited | Wholesale & retail | 2009 |
| Finea Ltd | Wholesale & retail | 2017 |
| Finedufy Ltd | Information & communication | 2025 |
| Finefil Import and Export Limited | Administrative & support | 2017 |
| Finergycloud Limited | Information & communication | 2025 |
| Finesse Personnel Services Ltd | Administrative & support | 2023 |
| Finesse Vehicle Interiors Ltd | Manufacturing | 2023 |
| Finest Brands Holdings Limited | Financial services | 2021 |
| Finevera Ltd | Wholesale & retail | 2025 |
| Fingersaviour | Professional & scientific | 2023 |
| Finhaus UK Ltd | Information & communication | 2017 |
| Finheritage Ltd | Financial services | 2019 |
| Finify Ltd. | Information & communication | 2019 |
| Finilla Solutions Ltd | Information & communication | 2019 |
| Finite Ventures Ltd | Administrative & support | 2017 |
| Finkira Ltd | Financial services | 2025 |
| Finklestar Ltd | Administrative & support | 2017 |
| Finland Hongtejia Crop Nutrition Co., Ltd | Professional & scientific | 2020 |
| Finn & Perry Limited | Hospitality | 2019 |
| Finn IT Consulting Ltd | Information & communication | 2015 |
| FINN6 Ltd | Wholesale & retail | 2026 |
| Finnchi Ltd | Financial services | 2019 |
| Finnchin Ltd | Financial services | 2019 |
| Finnegan Consultancy Ltd | Health & social care | 2020 |
| Finnos IT & E-Commerce Ltd | Wholesale & retail | 2025 |
| Finns Atlantic Ltd | Hospitality | 2025 |
| Finoaura Systems Ltd | Information & communication | 2014 |
| Finola Properties Limited | Real estate | 2024 |
| Finotips Ltd | Information & communication | 2021 |
| Finplex Group Ltd | Information & communication | 2020 |
| Finproxy Limited | Information & communication | 2024 |
| Finpulse Limited | Financial services | 2025 |
| Finsbury Food Group Limited | Professional & scientific | 1925 |
| Finservit Ltd | Information & communication | 2015 |
| Finset Consultants Ltd | Administrative & support | 2020 |
| Finsor Holding PLC | Financial services | 2024 |
| Finsor Ltd | Professional & scientific | 2024 |
| Finsor Management Ltd | Administrative & support | 2024 |
| Fintara Ltd | Wholesale & retail | 2025 |
| Fintech Capital Alliance Limited | Financial services | 2020 |
| Fintech Pulse Ltd | Information & communication | 2025 |
| Fintech Wales Collective | Other services | 2019 |
| Fintelli Ltd | Information & communication | 2020 |
| Fintenso Ltd | Financial services | 2024 |
| Fiona & Mina Limited | Administrative & support | 2026 |
| Fiona Geraghty Ltd | Health & social care | 2012 |
| Fiorra Ltd | Wholesale & retail | 2025 |
| Fipaza Financials Limited | Financial services | 2017 |
| Firar Torunu Ltd | Other services | 2026 |
| Firdous Associates Limited | Real estate | 2017 |
| Fire & Feast Fast Food Ltd | Hospitality | 2025 |
| Fire & Forge Crafts Ltd | Wholesale & retail | 2021 |
| Fire and Electrical Services Ltd | Manufacturing | 2025 |
| Fire and Electricals Ltd | Manufacturing | 2025 |
| Fire Assessments Wales Ltd | Public administration | 2025 |
| Fire Control Solutions Ltd | Manufacturing | 2026 |
| Fire Door Installation Services Ltd | Public administration | 2023 |
| Fire Flame Services Ltd | Construction | 2022 |
| Fire Retails Ltd | Wholesale & retail | 2025 |
| Fire Room Ltd | Wholesale & retail | 2022 |
| Fireballchainnetwork Limited | Manufacturing | 2021 |
| Firebox Foods Limited | Hospitality | 2017 |
| Firecrest Wood Burners & Stoves Limited | Construction | 2017 |
| Firefly Gymnastics Academy Limited | Arts & recreation | 2025 |
| Firefly Imaging Ltd | Information & communication | 2023 |
| Firefly Simulations Limited | Information & communication | 2025 |
| Firegoblet Contracting Ltd | Wholesale & retail | 2025 |
| Firelight by Fire Ltd | Hospitality | 2026 |
| Fireout Investigations Services Ltd | Administrative & support | 2014 |
| Firesport LLP | | 2025 |
| Firewall Films Ltd | Information & communication | 2025 |
| Firewater Merchants Ltd | Wholesale & retail | 2019 |
| Fireworks Clay Studios | Arts & recreation | 2004 |
| Firing Line Ltd | Administrative & support | 2008 |
| Firma JP Ltd | Wholesale & retail | 2018 |
| Firmstone Education Ltd | Professional & scientific | 2020 |
| Firmwise Ltd | Information & communication | 2026 |
| Firoxa Limited | Information & communication | 2024 |