| French Construction Services Ltd | Construction | 2022 |
| French Property Holdings Ltd | Real estate | 2025 |
| French Unity Ltd | Information & communication | 2019 |
| Frenchie London Limited | Hospitality | 2015 |
| Fresco & Selekt Foods Ltd | Hospitality | 2025 |
| Fresh Advice Ltd | Professional & scientific | 2018 |
| Fresh and Flawless Cleaning Ltd | Administrative & support | 2023 |
| Fresh Fesh Ltd | Wholesale & retail | 2022 |
| Fresh Food & Halal Meat Ltd | Wholesale & retail | 2013 |
| Fresh Foods North Ltd | Wholesale & retail | 2024 |
| Fresh Haven Cleaning Ltd | Administrative & support | 2025 |
| Fresh in Food Limited | Administrative & support | 2017 |
| Fresh Midlands Cleaners Ltd | Administrative & support | 2026 |
| Fresh TRR Ltd | Information & communication | 2022 |
| Fresh Wharf Developments Limited | Construction | 2004 |
| Freshairplants Ltd | Wholesale & retail | 2026 |
| Freshcare Cleaning Ltd | Construction | 2025 |
| Frest JOB Solutions Ltd | Professional & scientific | 2025 |
| Friar Street Leisure Ltd | Hospitality | 2022 |
| Friars Farm Northampton Ltd | Manufacturing | 2021 |
| Friendly Figures Ltd | Professional & scientific | 2025 |
| Friends of the Mother of Divine Mercy | Other services | 2009 |
| Friendsandbabies Ltd | Hospitality | 2026 |
| Friendship Zone Limited | Real estate | 2008 |
| Frimps Logistics Ltd | Transport & logistics | 2019 |
| Fritton Lodge Holiday Retreat Limited | Hospitality | 2020 |
| From the Blue Ltd | Professional & scientific | 2016 |
| From YOU 2 New Ltd | Wholesale & retail | 2025 |
| Front Photography Ltd | Manufacturing | 2021 |
| Frontir Ltd | Administrative & support | 2019 |
| Frontline S Logistics Ltd | Transport & logistics | 2020 |
| Frost Guardian Hvac Ltd | Energy | 2023 |
| Fruteiro Retail Limited | Other services | 2014 |
| FRY Chicks Ltd | Hospitality | 2016 |
| FRY Feast Foods Limited | Hospitality | 2025 |
| FS Advisory Ltd | Professional & scientific | 2009 |
| FS Regulatory Ltd | Professional & scientific | 2023 |
| FSADVISORY1 Limited | Professional & scientific | 2022 |
| FSB Sameday Ltd | Transport & logistics | 2023 |
| FSJ Property Solutions Ltd | Real estate | 2025 |
| FT Cleaning Services Limited | Administrative & support | 2026 |
| FTN Consulting Ltd | Information & communication | 2026 |
| FU Taste Limited | Hospitality | 2024 |
| FUD Cuisine Northampton Ltd | Hospitality | 2024 |
| FUD Property Management Ltd | Households | 2025 |
| Fuel Consulting Ltd | Professional & scientific | 2007 |
| Fuggle's Fettling Ltd | Wholesale & retail | 2019 |
| Fujipoly Europe Limited | Manufacturing | 1998 |
| Fulco Transport Ltd | Transport & logistics | 2022 |
| Fulcrum (England) Ltd | Extraterritorial | 2010 |
| Fulfilment & Ecommerce Ltd | Professional & scientific | 2022 |
| Fulfilment Ecommerce Ltd | Professional & scientific | 2022 |
| Fulfilment for Ecommerce Limited | Professional & scientific | 2022 |
| Fulga Limited | Wholesale & retail | 2026 |
| Fulga Marketing Limited | Information & communication | 2025 |
| Fulham Flight Services Ltd | Transport & logistics | 2024 |
| Full Communications Manchester Limited | Professional & scientific | 2016 |
| Full Express Transport Ltd | Transport & logistics | 2024 |
| Full Metal Software Limited | Information & communication | 2002 |
| Fullcross Management Limited | Wholesale & retail | 1999 |
| Fuller's Fish & Chips Ltd | Hospitality | 2016 |
| Fullers Farming Ltd | Agriculture & fishing | 2006 |
| Fullness of GOD Evangelical Ministries Limited | Other services | 2011 |
| Fultyme Company Limited | Administrative & support | 2024 |
| Fultyme Logistics Ltd | Transport & logistics | 2026 |
| FUM 69 Ltd | Transport & logistics | 2016 |
| FUN Holiday Tour Ltd | Wholesale & retail | 2024 |
| Function & Form Digital Ltd | Professional & scientific | 2017 |
| Fundraising Consultancy Yorkshire Ltd | Financial services | 2023 |
| Fungab Global Entertainment Ltd | Information & communication | 2025 |
| Funkytowngrooves Ltd | Manufacturing | 2006 |
| Funlife Limited | Professional & scientific | 2023 |
| Funny Onion Theatre Limited | Arts & recreation | 2010 |
| Funstation Limited | Arts & recreation | 2004 |
| Furbee Limited | Manufacturing | 2025 |
| Furbliss Ltd | Wholesale & retail | 2024 |
| Furlong Heights (Lavendon) Management Company Limited | Households | 2023 |
| Furnifit Ltd | Manufacturing | 2023 |
| Furniture Crash Ltd | Wholesale & retail | 2022 |
| Furniture First Limited | Professional & scientific | 2014 |
| Furniture Loft Limited | Wholesale & retail | 2016 |
| Furniture Sales and Marketing Ltd | Wholesale & retail | 2019 |
| Furnitureplan by Frem Group Limited | Manufacturing | 2023 |
| Furnys Vehicle Wash Limited | Administrative & support | 2023 |
| Fury Gym Northampton Ltd | Extraterritorial | 2023 |
| Furze Grounds Farm Limited | Agriculture & fishing | 2025 |
| Fuse Collaboration Services Ltd | Information & communication | 2024 |
| Fusejob Electrical Ltd | Construction | 2021 |
| Fusilier Design Group Ltd | Professional & scientific | 2025 |
| Fusilier Design Ltd | Professional & scientific | 2011 |
| Fusion Asia Limited | Hospitality | 2025 |
| Fusion Management Support Limited | Professional & scientific | 2011 |
| Fusion Project Solutions Ltd | Other services | 2018 |
| Futurama Travel Limited | Administrative & support | 2013 |
| Future (Drigg) Ltd | Energy | 2016 |
| Future (Pennygillam) Limited | Energy | 2014 |
| Future Capital Partners Limited | Financial services | 2000 |
| Future Carehomes Limited | Health & social care | 2011 |
| Future Proof Plus Limited | Professional & scientific | 2025 |
| Future Proof Pro Ltd | Professional & scientific | 2020 |