| Fine Art Traders Ltd | Wholesale & retail | 2025 |
| Fine Dine Kitchens Ltd | Health & social care | 2025 |
| Fine SRB Ltd | Construction | 2019 |
| Finger on the Pulse Limited | Health & social care | 2014 |
| Finin Acumen UK Limited | Wholesale & retail | 2026 |
| Finity Finance Ltd | Financial services | 2025 |
| Finmarka Limited | Wholesale & retail | 2023 |
| Finpaye Tech Bilisim Danismanlik Limited | Other services | 2018 |
| Fintechbyt Limited | Information & communication | 2021 |
| Fintrac Consulting Ltd | Professional & scientific | 2018 |
| Fiona 59 Health Care Limited | Health & social care | 2019 |
| Fire Risk Response Ltd | Administrative & support | 2020 |
| Firman & Co Ltd | Real estate | 2017 |
| First Alliance Investment Limited | Administrative & support | 2017 |
| First Assist Limited | Transport & logistics | 2023 |
| First Choice Kitchen & Bedroom Limited | Construction | 2017 |
| First Choice Lime Tree Properties Ltd | Real estate | 2023 |
| First Eagle Security London Ltd | Administrative & support | 2022 |
| First EAT Ltd | Hospitality | 2025 |
| First Management Systems Limited | Hospitality | 1999 |
| First Pass Airport Services Ltd | Transport & logistics | 2025 |
| Firstcare Double Glazing Ltd | Construction | 2021 |
| Firstdrive Manpower Ltd | Administrative & support | 2022 |
| Fish and Meat Corner Ltd | Wholesale & retail | 2025 |
| Fish Basket Ltd | Hospitality | 2024 |
| Fish Corner Limited | Wholesale & retail | 2020 |
| Fishey Business (Sussex) Limited | Wholesale & retail | 1986 |
| Fit and FIX Building Services Ltd | Construction | 2014 |
| Fit and FIX Ltd | Construction | 2011 |
| Fit My Bedrooms Ltd | Construction | 2019 |
| Fit Squad Ltd | Wholesale & retail | 2019 |
| Fitec Ltd | Construction | 2020 |
| Fitlement Ltd | Wholesale & retail | 2019 |
| Fitter Circle Ltd | Information & communication | 2024 |
| Five Star Developers Capital Ltd | Construction | 2025 |
| Five Zero Limited | Real estate | 2020 |
| FIX Appliance Repair and Maintenance Service Ltd | Manufacturing | 2021 |
| FIX General Ltd | Construction | 2023 |
| Fixstation Ltd | Wholesale & retail | 2018 |
| Fizza Consultants Limited | Professional & scientific | 2021 |
| Fizza Properties Limited | Real estate | 2024 |
| Fkhan Solutions Ltd | Transport & logistics | 2023 |
| FKW Limited | Hospitality | 2019 |
| Flam GR Eats Ltd | Hospitality | 2018 |
| Flamin Grillicious Ltd | Hospitality | 2012 |
| Flash F.S Limited | Professional & scientific | 2013 |
| Flavor Events Limited | Hospitality | 2018 |
| Flavors Kitchen Ltd | Hospitality | 2018 |
| Flavors of India Ltd | Hospitality | 2007 |
| Flavour Fusion Foods Ltd | Extraterritorial | 2024 |
| Flawless Hair & Beauty Salon Ltd | Other services | 2023 |
| Fleetway Hiring Limited | Administrative & support | 2014 |
| Flex IT Ltd | Wholesale & retail | 2020 |
| Flex Physio & Rehab Ltd | Other services | 2015 |
| Flex Property Ltd | Real estate | 2021 |
| Flexiserve Express Ltd | Information & communication | 2015 |
| Flight Speeds Ltd | Professional & scientific | 2008 |
| Flight United Limited | Administrative & support | 2017 |
| Flights & Holidays UK Ltd | Administrative & support | 2014 |
| Fliphive Ltd | Wholesale & retail | 2026 |
| Flippy Investments Limited | Real estate | 2021 |
| Flitwick Films Ltd | Information & communication | 2026 |
| FLM Consultancy Limited | Professional & scientific | 2025 |
| Floor Sanding Solution Ltd | Construction | 2025 |
| Florence Hair and Beauty Ltd | Wholesale & retail | 2020 |
| Florence Hair Beauty & Fashion Ltd | Wholesale & retail | 2017 |
| Florusso Ltd | Construction | 2016 |
| Flory D'Or Limited | Wholesale & retail | 2025 |
| Flourish Builder Limited | Construction | 2025 |
| Flow &Forge Ltd | Manufacturing | 2025 |
| Flow Pipe Ltd | Wholesale & retail | 2026 |
| Flower Tower Ltd | | 2015 |
| Floworx Limited | Construction | 2024 |
| Flowtek Ltd | Information & communication | 2025 |
| FLY Line Transport Ltd | Transport & logistics | 2017 |
| Flycorpo Travels Ltd | Administrative & support | 2023 |
| Flycristal Airways Ltd | Transport & logistics | 2021 |
| FLYSTR8KICKS Ltd | Wholesale & retail | 2025 |
| Flyurdream Ltd | Education | 2019 |
| FM Centre Ltd | Education | 2023 |
| FM Rental Solution Ltd | Real estate | 2022 |
| FMD Services Ltd | Information & communication | 2018 |
| FME Marketing Ltd | Professional & scientific | 2022 |
| FMK International Ltd | Wholesale & retail | 2023 |
| FMT Corporation Limited | Information & communication | 2012 |
| Focus Care (PVT) Ltd | Health & social care | 2023 |
| Focus Realtors Ltd | Real estate | 2024 |
| Fonalize UK Ltd | Other services | 2018 |
| Fone Gadget Limited | Wholesale & retail | 2024 |
| Fone Star Limited | Other services | 2016 |
| Fonegiant London Limited | Wholesale & retail | 2023 |
| Fonehut Folkestone Ltd | Wholesale & retail | 2019 |
| Food & Drink Zone UK Ltd | Wholesale & retail | 2018 |
| Food Buddy Limited | Wholesale & retail | 2025 |
| Food Inside and Take Away Ltd | Hospitality | 2026 |
| Food N Wines Limited | Wholesale & retail | 2025 |
| Food Rest Limited | Hospitality | 2025 |
| Foodlink Global Restaurants and Catering Services Limited | Hospitality | 2025 |
| Foodmart Hounslow Limited | Wholesale & retail | 2016 |
| Footprints Properties Limited | Real estate | 2019 |