| Finridge Ltd | Administrative & support | 2026 |
| Finsbury Estates Ltd | Real estate | 2002 |
| Finsonia Ltd | Information & communication | 2023 |
| Finsso Estate Planning Ltd | Professional & scientific | 2020 |
| Finsso Financial Ltd | Financial services | 2019 |
| Finstant Ltd | Information & communication | 2018 |
| Finsync UK Limited | Professional & scientific | 2025 |
| Fintado Ltd | Financial services | 2025 |
| Fintec Europe Ukeig | | 2016 |
| Fintech Sea Technology Limited | Information & communication | 2019 |
| Fintego Capital Group Limited | Wholesale & retail | 2026 |
| Fintego Capital Ltd | Wholesale & retail | 2022 |
| Fintellect Recruitment Limited | Administrative & support | 2018 |
| Fintelligent Search Ltd | Administrative & support | 2015 |
| Finteri Limited | Professional & scientific | 2026 |
| Finterra Growth Partners Limited | Financial services | 2025 |
| Fintrak Capital Ltd | Financial services | 2025 |
| Fintrak Properties Ltd | Real estate | 2025 |
| Fintrixor Limited | Information & communication | 2026 |
| Fintrixy Assetra Trading Ltd | Extraterritorial | 2026 |
| Finvisio Consulting Ltd | Professional & scientific | 2025 |
| Finwise Solutions Limited | Professional & scientific | 2025 |
| Finz Ltd | Administrative & support | 2026 |
| Fiona Gasper Limited | Professional & scientific | 2020 |
| Fiona Johnson Limited | Health & social care | 2006 |
| Fiona Williams Productions Limited | Administrative & support | 2012 |
| Fior Kitchens Ltd | Wholesale & retail | 2023 |
| Fiore Consulting Limited | Professional & scientific | 2025 |
| Fiori Cafe 1 Ltd | Hospitality | 2024 |
| Fiori Cafe Group Ltd | Hospitality | 2024 |
| Fiori Cafe Nobel Way Ltd | Hospitality | 2024 |
| FIP Projects Limited | Construction | 2018 |
| FIR Wood Technical Solutions Ltd | Construction | 2023 |
| Firas Mallah Ltd | Wholesale & retail | 2025 |
| Firbank Management Limited | Real estate | 2001 |
| Fircoombe Hall Limited | Extraterritorial | 2016 |
| Firdale Park Apartments Management Company (NO.2) Limited | Households | 1982 |
| Fire & Security Services Ltd | Administrative & support | 2025 |
| Fire & Security Technical Services Limited | Construction | 2001 |
| Fire (BC) Holdco Limited | Financial services | 2018 |
| Fire + Security Management Limited | Construction | 2019 |
| Fire and Rescue Support Service | Other services | 2017 |
| Fire and Smoke Podcast Ltd | Information & communication | 2026 |
| Fire by the River Ltd | Arts & recreation | 2011 |
| Fire Compliance Consultancy Services Ltd | Information & communication | 2024 |
| Fire Door Systems NW Ltd | Construction | 2025 |
| Fire Doors Limited | Manufacturing | 2006 |
| Fire Doors Manchester Limited | Manufacturing | 2016 |
| Fire Engineering Consultancy Ltd | Professional & scientific | 2019 |
| Fire Fabrication Limited | Manufacturing | 2017 |
| Fire Food Flavours Limited | Hospitality | 2023 |
| Fire Guidance UK LLP | | 2012 |
| Fire Lotus Limited | Health & social care | 2024 |
| Fire Protection Systems Limited | Manufacturing | 2014 |
| Fire Safe Contractors Ltd | Construction | 2023 |
| Fire Safety by Day Limited | Professional & scientific | 2024 |
| Fire Safety North West Limited | Public administration | 2016 |
| Fire Sprinkler Servicing Ltd | Construction | 2024 |
| Fire Sure Compliance Ltd | Construction | 2025 |
| Fire Tiger Events Ltd | Hospitality | 2023 |
| Fire Tiger Factory Limited | Hospitality | 2025 |
| Fire Tiger FIN Limited | Hospitality | 2026 |
| Fire Tiger Island Limited | Hospitality | 2023 |
| Fire Tiger Limited | Hospitality | 2019 |
| Fire Tiger Properties Limited | Real estate | 2022 |
| Firearms Ltd | Wholesale & retail | 2018 |
| Fireaway Manchester Ltd | Hospitality | 2020 |
| Firebelly Stoves Limited | Manufacturing | 2006 |
| Firebite Ltd | Hospitality | 2025 |
| Firecask Limited | Information & communication | 2013 |
| Firecfd Limited | Professional & scientific | 2025 |
| Firedawn Limited | Real estate | 2026 |
| Firefinch Media Ltd | Wholesale & retail | 2025 |
| Fireflai Group Limited | Information & communication | 2023 |
| Firefly Fire Protection Ltd | Administrative & support | 2019 |
| Firefly Portfolio Limited | Real estate | 2017 |
| Firefly Scientific Limited | Professional & scientific | 2005 |
| Firefly Vision Ltd | Administrative & support | 2023 |
| Firehalt Installations Ltd | Construction | 2003 |
| Firehawk Limited | Construction | 1987 |
| Fireheron Activewear Ltd | Wholesale & retail | 2026 |
| Firehorse Empowerment Ltd | Administrative & support | 2026 |
| Firehouse Foods Ltd | Hospitality | 2022 |
| Fireleap Ltd | Professional & scientific | 2024 |
| Firemec Ltd | Professional & scientific | 2025 |
| Firenze Group Ltd | Information & communication | 2023 |
| Fireshield Security Limited | Administrative & support | 2025 |
| Fireside PR Ltd | Professional & scientific | 2025 |
| Firesmarter Limited | Public administration | 2016 |
| Firesnap Limited | Information & communication | 2014 |
| Firestone Flat Roofing Limited | Construction | 2025 |
| Firetron Ltd | Construction | 2020 |
| Firetruck Parts Trading Ltd | Administrative & support | 2018 |
| Fireworks 4 U Ltd | Manufacturing | 2020 |
| Firhawk Limited | Real estate | 2024 |
| Firinel Distribution Ltd | Transport & logistics | 2025 |
| Firloch Limited | Real estate | 2014 |
| Firm Benefit Limited | Wholesale & retail | 2020 |
| Firma Construction Ltd | Other services | 2022 |
| Firmarket Ltd. | Professional & scientific | 2022 |