| FAB Foods NE Ltd | Hospitality | 2025 |
| Fabray Ltd | Information & communication | 2021 |
| Fabric Academy Ltd | Education | 2020 |
| Fabricari Special Projects Limited | Construction | 2007 |
| Fabweld NE Ltd | Construction | 2026 |
| Facade Detailing Service Limited | Professional & scientific | 2014 |
| Facades Testing Limited | Construction | 2017 |
| Face DOC Ltd | Health & social care | 2014 |
| Facility Integrity Services Limited | Construction | 2015 |
| Faculty of Accountants and Auditors Limited | Other services | 1928 |
| Fada Limited | Hospitality | 2021 |
| Fadamo Ltd | Wholesale & retail | 2022 |
| Fade Zones Barber Ltd | Other services | 2024 |
| Faeger Networks Limited | Information & communication | 2025 |
| Fagron Holding UK Ltd | Other services | 2025 |
| Fagron UK Ltd | Wholesale & retail | 2007 |
| Fahm Pro Ltd | Real estate | 2021 |
| Fahmid Optics Limited | Health & social care | 2025 |
| Fair COP Limited | Hospitality | 2020 |
| Fair Energy Savings Ltd | Energy | 2026 |
| Fairbairn Claims Services Limited | Financial services | 2012 |
| Fairbourne Luxury Developments Ltd | Construction | 2022 |
| Fairbourne NE Ltd | Real estate | 2025 |
| Fairfield Park (Haltwhistle) Limited | Real estate | 2002 |
| Fairfields Consultancy Limited | Professional & scientific | 2026 |
| Fairley FI Ltd | Financial services | 2024 |
| Fairley Gunn Group Ltd | Financial services | 2021 |
| Fairley Gunn Holdings Ltd | Financial services | 2024 |
| Fairman Chemists Limited | Wholesale & retail | 1986 |
| Fairs Developments (Bardon) Limited | Construction | 2021 |
| Fairs Fair Tax Ltd | Professional & scientific | 2021 |
| Fairuz Ltd | Wholesale & retail | 2025 |
| Fairview Gardens (Stockton) Management Limited | Real estate | 2008 |
| Fairway Golfwear Limited | Wholesale & retail | 2025 |
| Faith in GOD Ministries International Newcastle | Other services | 2023 |
| Faithful Publications Ltd | Information & communication | 2021 |
| Faithissue Limited | Real estate | 1991 |
| Faizan E Bahu Ltd | Education | 2024 |
| Faktraders Ltd | Wholesale & retail | 2025 |
| Falafel Express Ltd | Hospitality | 2018 |
| Falco Ecology Limited | Professional & scientific | 2017 |
| Falcon Commercial NE Ltd | Real estate | 2021 |
| Falcon Design & Build NE Ltd | Construction | 2022 |
| Falcon Grove Management Company Limited | Households | 2024 |
| Falcon Holdings NE Ltd | Financial services | 2021 |
| Falcon Homes NE Ltd | Real estate | 2022 |
| Falcon Residential NE Ltd | Real estate | 2021 |
| Falcon Sales Online Ltd | Wholesale & retail | 2024 |
| Falconers Apartments Management Company Limited | Real estate | 2005 |
| Falcus Roofing Ltd. | Construction | 2017 |
| Falmouth House Masonic Hall Limited | Other services | 2001 |
| Falsgrave Services Limited | Health & social care | 2018 |
| Family Hearing Ltd | Wholesale & retail | 2022 |
| Family Law Matters Limited | Professional & scientific | 2023 |
| Family Secrets Productions Ltd | Information & communication | 2025 |
| Family Slice Blyth Ltd | Hospitality | 2026 |
| FAN Four Limited | Financial services | 2025 |
| Fancy Spirits Ltd | Hospitality | 2022 |
| Fangs Investments Limited | Financial services | 2024 |
| Fangs Media Limited | Professional & scientific | 2020 |
| Fangs Properties Limited | Real estate | 2021 |
| Fanicamajaru Transport Ltd | Manufacturing | 2025 |
| Fantasy Football Ngst Limited | Professional & scientific | 2025 |
| Fantin Ltd | Professional & scientific | 2007 |
| Fanwave Digital Limited | Professional & scientific | 2014 |
| Farah Chemists Limited | Wholesale & retail | 1996 |
| Farah Denton Limited | Wholesale & retail | 2025 |
| Faramond UK Limited | Financial services | 2008 |
| Faran Logistics Ltd | Transport & logistics | 2025 |
| Farina Kitchen Group Limited | Hospitality | 2026 |
| Farkziq Ltd | Wholesale & retail | 2020 |
| Farmcomplai Ltd | Information & communication | 2026 |
| Farmyard Fortune Ltd | Wholesale & retail | 2025 |
| Farndale Enterprise Ltd | Wholesale & retail | 2025 |
| Farne Divers Limited | Arts & recreation | 2017 |
| Farrier Residential Ltd | Real estate | 2025 |
| Farrow House Properties Ltd | Real estate | 2021 |
| Farspace Technologies Ltd | Transport & logistics | 2019 |
| Farzana Brow Studio Ltd | Other services | 2020 |
| Fash Properties Ltd | Real estate | 2021 |
| FASH1.COM Limited | Wholesale & retail | 2014 |
| Fashion Centre Ltd | Wholesale & retail | 2025 |
| Fashion Sense ACC Ltd | Wholesale & retail | 2018 |
| Fashion Village Ltd | Wholesale & retail | 2014 |
| Fast Access Ltd | Construction | 2021 |
| Fast Feet Football Academy Ltd | Arts & recreation | 2012 |
| Fast Food Experts Ltd | Hospitality | 2015 |
| Fast MAP (UK) Limited | Real estate | 2016 |
| Fast Track Garage Limited | Wholesale & retail | 2020 |
| Fast Track Leaflet Distribution (NE) Ltd | Transport & logistics | 2020 |
| Fast Track MOT Centre Ltd | Wholesale & retail | 2024 |
| Fast Track Sourcing Limited | Wholesale & retail | 2010 |
| Fast Transport Group Limited | Transport & logistics | 2025 |
| Fastfood.Newcastle Ltd | Hospitality | 2025 |
| FAT Hippo 7 Ltd | Hospitality | 2019 |
| FAT Hippo Group Limited | Financial services | 2017 |
| FAT Hippo Kiosk Ltd | Hospitality | 2019 |
| FAT Hippo Newcastle Limited | Hospitality | 2013 |
| FAT Hippo Restaurants Limited | Hospitality | 2010 |
| FAT Hippo to Go Limited | Hospitality | 2015 |