| Fidra Advisers Ltd | Professional & scientific | 2026 |
| Fietsch LET Ltd | Real estate | 2025 |
| Fily B Paint Spraying Ltd | Manufacturing | 2016 |
| Financial Director Kabika Orbán Limited | Financial services | 2024 |
| Finchworth Limited | Health & social care | 1988 |
| Fintech Group Advisory Limited | Professional & scientific | 2026 |
| Fire 97 Limited | Other services | 2015 |
| First Team Physiotherapy Ltd | Other services | 2017 |
| Firstclassroofingne Limited | Construction | 2025 |
| Fish Face Limited | Hospitality | 2024 |
| Fisher Construction Consultants Limited | Construction | 2009 |
| Fit House North East Limited | Arts & recreation | 2021 |
| Fit Inn Limited | Arts & recreation | 2018 |
| Fitnessmate Limited | Information & communication | 2025 |
| FIX My Water Softener Ltd | Other services | 2023 |
| FJ Flooring (Peterlee) Limited | Construction | 2019 |
| Flamingos Nights Ltd | Hospitality | 2025 |
| Flawless Inspection Services Limited | Construction | 2007 |
| Fleet Debtco Limited | Financial services | 2023 |
| Fleet Holdco Limited | Financial services | 2023 |
| Fleet Loanco Limited | Financial services | 2023 |
| Fleet Securityco Limited | Financial services | 2023 |
| Fleet Topco Limited | Financial services | 2023 |
| Fletcher Engineering NE Limited | Professional & scientific | 2022 |
| Flex Freight Ltd | Transport & logistics | 2024 |
| Fliegel Jezerniczky Limited | Administrative & support | 2004 |
| Flow Aerodynamics Limited | Manufacturing | 2017 |
| Flow PAY Solutions Ltd | Information & communication | 2026 |
| Fluggles Flats Ltd | Hospitality | 2020 |
| Flux Media PPC Ltd | Administrative & support | 2014 |
| FLY High Productions Ltd | Arts & recreation | 2024 |
| Focus Cladding Limited | Construction | 2012 |
| Focus Expert Ltd | Professional & scientific | 2007 |
| Focus Metal Works Ltd | Manufacturing | 2026 |
| Focus on Cleaning Services Ltd | Administrative & support | 2022 |
| Focus Park Investments Limited | Real estate | 2025 |
| Focus Removal North East Ltd | Transport & logistics | 2025 |
| Focus Removals & Storage/Teesside Ltd | Transport & logistics | 2017 |
| Focus Removals Leeds Ltd | Transport & logistics | 2026 |
| Focus Storage Ltd | Transport & logistics | 2026 |
| Foll Creative CIC | Information & communication | 2026 |
| Food Elliniko Ltd | Hospitality | 2025 |
| Food Ninjas Limited | Information & communication | 2022 |
| Food Tray and Catering Ltd | Hospitality | 2025 |
| Football Network Group Limited | Arts & recreation | 2017 |
| Footprints Learning for Life Limited | Education | 2014 |
| Forchem Ltd. | Wholesale & retail | 2002 |
| Ford & Ford Ltd | Other services | 2013 |
| Forensic Facades Limited | Construction | 2018 |
| Forester Close 1960 Limited | Extraterritorial | 2014 |
| Forester Services Limited | Professional & scientific | 2024 |
| Forvelop Co Limited | Administrative & support | 2025 |
| Forward Features Ltd | Information & communication | 2018 |
| Forward Outlook Ltd | Administrative & support | 2017 |
| Foster Morton Aesthetics LLP | | 2021 |
| Four Winds Healthcare Limited | Other services | 2014 |
| Four Winds Lettings Limited | Real estate | 2017 |
| Fowtrans Limited | Transport & logistics | 2012 |
| Foxbnk Investments Limited | Real estate | 2024 |
| FP Order Limited | Hospitality | 2025 |
| Franchise Property Management Ltd | Professional & scientific | 2016 |
| Franchize Services Limited | Administrative & support | 2026 |
| Frank Wind Operations Ltd | Construction | 2020 |
| Frankies Legal Services Ltd | Public administration | 2025 |
| Fraser Henderson Ltd | Construction | 2021 |
| Fraser Inspection Services Limited | Professional & scientific | 2008 |
| Freedom Protect Limited | Administrative & support | 2013 |
| Fresh Tasty Bites Ltd | Wholesale & retail | 2024 |
| Front Edge Facade Design Ltd | Professional & scientific | 2025 |
| FT Electrical Services Ltd | Construction | 2018 |
| FT Properties (NE) Ltd | Real estate | 2020 |
| FTF Homes Limited | Real estate | 2025 |
| Fullspectrum Group Limited | Professional & scientific | 2020 |
| Fumeben Global Ltd | Wholesale & retail | 2024 |
| Funkarr Limited | Wholesale & retail | 2024 |
| Funky Fetish UK Ltd | Wholesale & retail | 2025 |
| Furze-Field Construction Limited | Construction | 2018 |
| Fusion Futures CIC | Professional & scientific | 2025 |
| Fusion Media Group UK Limited | Professional & scientific | 2025 |
| Fuzzyhoods Ltd | Wholesale & retail | 2024 |
| G & E Mercury Ltd | Construction | 2018 |
| G & G Leisure Limited | Hospitality | 1999 |
| G & N Welding and Inspection Ltd | Professional & scientific | 2024 |
| G a Roofing Contractors Ltd | Construction | 2022 |
| G and a Crow Limited | Real estate | 2017 |
| G Cull Inspections Ltd | Construction | 2019 |
| G KAY Solutions Limited | Real estate | 2017 |
| G Kullar Logistics (NE) Ltd | Transport & logistics | 2025 |
| G P P J C Limited | Professional & scientific | 2011 |
| G R Finance Limited | Financial services | 2006 |
| G S Bell (Fencing) Limited | Construction | 2002 |
| G Wood Consultancy Ltd | Professional & scientific | 2023 |
| G&A House Ltd | Real estate | 2018 |
| G&J Electrical Consultants Ltd | Professional & scientific | 2025 |
| G&T Crow Events Limited | Administrative & support | 2026 |
| G-Storm Scaffolding Limited | Construction | 2019 |
| G. Cracknell Limited | Wholesale & retail | 1981 |
| G. M. H. School of Motoring Limited | Other services | 2004 |
| G.C Offshore 1 Limited | Professional & scientific | 2024 |
| G.C. Civil Engineering Limited | Construction | 2003 |