| Fastrax MOT Centre Ltd | Wholesale & retail | 2023 |
| Fastsigns (Leeds) Limited | Manufacturing | 2002 |
| Fastwalker Utilities Limited | Information & communication | 2018 |
| Fastwardz Ltd | Wholesale & retail | 2023 |
| FAT Joes 2 Ltd | Hospitality | 2025 |
| FAT Kraken Studios Limited | Information & communication | 2016 |
| FAT Pigeon Bakery Ltd | Manufacturing | 2023 |
| Fat-Pie Ltd | Wholesale & retail | 2024 |
| Fatbros Ltd | Hospitality | 2022 |
| Fatima Logistics Ltd | Transport & logistics | 2026 |
| Fatima Nora Ltd | Health & social care | 2020 |
| Fatphrocks Ltd | Wholesale & retail | 2009 |
| Fatpro Ltd | Other services | 2024 |
| Fatty's & Feeders Ltd | Hospitality | 2019 |
| Faulkner Property Solutions Ltd | Real estate | 2026 |
| Faux Blossom Limited | Wholesale & retail | 2025 |
| Favour Mart Ltd | Wholesale & retail | 2025 |
| Favour the Brave Limited | Professional & scientific | 2022 |
| FAW Elevate Consultancy Ltd | Other services | 2019 |
| Fawcett 1964 Limited | Extraterritorial | 2013 |
| Fawcett Gardens (Driffield) Management Limited | Households | 2000 |
| Fawcett Smith Limited | Wholesale & retail | 2023 |
| Fawkes Studios Ltd | Information & communication | 2023 |
| Fawn Hold Co (One) Limited | Financial services | 2021 |
| Faymore Limited | Professional & scientific | 2016 |
| FAZ Couriers Ltd | Transport & logistics | 2025 |
| FAZ GH Security Ltd | Administrative & support | 2022 |
| FAZ Real Estate Ltd | Real estate | 2024 |
| Fazatex Limited | Manufacturing | 2023 |
| Fazel Engineering Ltd | Professional & scientific | 2016 |
| FB Accounting Limited | Professional & scientific | 2018 |
| FB Comms Limited | Information & communication | 2022 |
| FB Fashion Ball Limited | Extraterritorial | 2013 |
| FB Fast Food Ltd | Hospitality | 2026 |
| FB Practice Ltd | Health & social care | 2020 |
| FB Services Yorkshire Ltd | Hospitality | 2020 |
| FBM Capital Ltd | Real estate | 2025 |
| FBT (AD) Ventures Ltd | Real estate | 2024 |
| FC 2010 Holdings Limited | Professional & scientific | 2009 |
| FC Corporate Company Limited | Transport & logistics | 2023 |
| FC Farsley Limited | Arts & recreation | 2025 |
| FC Farsley Sports Club Limited | Arts & recreation | 2025 |
| FC Homes Ltd. | Construction | 2017 |
| FC LGV and HGV Training Ltd | Education | 2022 |
| FCN Frozen Foods Ltd | Hospitality | 2018 |
| FCN Limited | Transport & logistics | 2004 |
| Fcnm Ltd | Households | 2023 |
| FCR Logistics Limited | Transport & logistics | 2009 |
| FCR Solutions Limited | Wholesale & retail | 2025 |
| FCS North Property Ltd | Real estate | 2024 |
| Fctonline Limited | Wholesale & retail | 2013 |
| FCX Technologies Ltd | Information & communication | 2015 |
| FD Furnishings Ltd | Construction | 2021 |
| FD Healthcare Ltd | Health & social care | 2018 |
| FD Project Management Ltd | Construction | 2021 |
| Fdalessio Holdings Ltd | Information & communication | 2024 |
| FDQ Limited | Education | 2005 |
| FDS Estates Ltd | Real estate | 2025 |
| FDS Systems Limited | Information & communication | 2014 |
| FDT Group Limited | Professional & scientific | 2025 |
| Fduk Holdings Limited | Financial services | 2024 |
| Fduk Property Management Limited | Real estate | 2024 |
| FDW Property Holdings Ltd | Other services | 2016 |
| FDX Transport Ltd | Financial services | 2023 |
| FE Corporate Services Ltd | Real estate | 2002 |
| Fear Free Ventures Ltd | Other services | 2022 |
| Fearless Marketing (Yorkshire) Ltd | Professional & scientific | 2022 |
| Fearnbank Limited | Wholesale & retail | 2024 |
| Fearnley Eyecare Limited | Health & social care | 2017 |
| Fearnley Sign Installations Limited | Construction | 2015 |
| Fearnsport Automotive Limited | Wholesale & retail | 2012 |
| Feasible Healthcare Ltd | Health & social care | 2020 |
| Feasts Events & Catering Ltd | Hospitality | 2024 |
| Feather AI Data Processing Ltd | Information & communication | 2025 |
| Featherbank Selection Limited | Administrative & support | 2017 |
| Feathered Edge Joinery & Building Solutions Limited | Construction | 2013 |
| Featherfoot Crystals Limited | Financial services | 2019 |
| Featherfoot Cuthbert House Limited | Financial services | 2020 |
| Featherfoot Globe Limited | Financial services | 2021 |
| Featherstone Project Limited | Professional & scientific | 2026 |
| Feature Media Limited | Information & communication | 2010 |
| Feature, NOT a BUG Ltd | Information & communication | 2021 |
| Febsam Ltd | Information & communication | 2026 |
| FED Enterprise Ltd | Hospitality | 2015 |
| Fedak Driving Ltd | Transport & logistics | 2025 |
| Federal Securities Limited | Information & communication | 2011 |
| Federal-Mogul Shoreham Limited | Extraterritorial | 1940 |
| Fedutech Ltd | Education | 2025 |
| Feedo's Delight Limited | Hospitality | 2023 |
| Feedo's Express Limited | Hospitality | 2025 |
| Feedprof ENG Limited | Agriculture & fishing | 2026 |
| Feel Electric Ltd | Information & communication | 2020 |
| Feel Fresh (Leeds) Ltd | Other services | 2025 |
| Feel Good ENT Limited | Health & social care | 2021 |
| Feel Good Factor (Leeds) | Information & communication | 2006 |
| Feel Good Productions Ltd | Arts & recreation | 2018 |
| Feet First Ltd | Health & social care | 2012 |
| Fejiwins Ltd | Wholesale & retail | 2022 |
| Feleg(Y/L) Real Estate Ltd | Real estate | 2026 |
| Felice Hospitality International Ltd | Wholesale & retail | 2024 |