| Floom Ltd | Wholesale & retail | 2015 |
| Floorcrew Limited | Construction | 2017 |
| Flooring Workshop Ltd | Wholesale & retail | 2003 |
| Floorix Ltd | Wholesale & retail | 2025 |
| Floortrak Holdings Limited | Financial services | 2025 |
| Floortrak UK Limited | Construction | 2024 |
| Floorworks London Ltd | Wholesale & retail | 2024 |
| Florence & Field Limited | Professional & scientific | 2020 |
| Flori International Limited | Wholesale & retail | 2015 |
| Flori's Hand Car Wash Ltd | Wholesale & retail | 2023 |
| Florin Hemicuda Ltd | Transport & logistics | 2018 |
| Floristry by Angelika Ltd | Wholesale & retail | 2022 |
| Floro Holdings Ltd | Information & communication | 2022 |
| Flourish Forward Ltd | Hospitality | 2025 |
| Flourish Landscapes Ltd | Administrative & support | 2015 |
| Flourish Ltd Ltd | Education | 2023 |
| Flow Tech Drainage Limited | Construction | 2024 |
| Flower Factory Bournemouth Limited | Wholesale & retail | 2015 |
| Flower Factory Southampton Ltd | Wholesale & retail | 2016 |
| Flower Genie Limited | Administrative & support | 2020 |
| Flower Genie Rental Services (UK) Limited | Administrative & support | 2006 |
| Flower Logistics Ltd | Transport & logistics | 2023 |
| Flowerdown Management Company Limited | Households | 2001 |
| Flowers for Today Limited | Wholesale & retail | 2017 |
| Flowers of Rustington (2007) Limited | Wholesale & retail | 2007 |
| Flowing River Ventures Limited | Transport & logistics | 2025 |
| Flowless Limited | Health & social care | 2019 |
| Flowtrix Limited | Construction | 2026 |
| FLT Hydraulics & Repairs Ltd | Manufacturing | 2022 |
| Fluecraft Limited | Construction | 2017 |
| Fluid Motion Theatre Company | Arts & recreation | 2010 |
| Flumen Estates Limited | Real estate | 2026 |
| Flumen Holdings Ltd | Financial services | 2025 |
| Flutterby Homes Limited | Real estate | 2019 |
| Flux Bros. Ltd | Information & communication | 2020 |
| Flux Media Group Ltd | Professional & scientific | 2025 |
| FLX Construction Ltd | Construction | 2020 |
| Flying Birds Travel Ltd | Transport & logistics | 2025 |
| Flying Dutch Limited | Transport & logistics | 2016 |
| Flying Gondola Ltd | Construction | 2022 |
| Flying High Coaching Limited | Professional & scientific | 2019 |
| Flying Mackerel Limited | Information & communication | 2012 |
| FLYING@50 Limited | Information & communication | 2025 |
| FM Valeting Ltd | Wholesale & retail | 2022 |
| Fmch Ltd | Financial services | 2018 |
| FMD Limited | Wholesale & retail | 2024 |
| FMK Engineering Consultants Limited | Professional & scientific | 2010 |
| FN Mavimbela Ltd | Health & social care | 2022 |
| FNK Consultancy Limited | Information & communication | 2018 |
| Foam Force Ltd | Administrative & support | 2026 |
| Focal Heat Ltd | Construction | 2024 |
| Focus Driver Training Ltd | Education | 2011 |
| Focus Media Marketing Limited | Professional & scientific | 2021 |
| Focus Nails Limited | Other services | 2017 |
| Focus Sensors Limited | Professional & scientific | 2015 |
| Focused Media Limited | Information & communication | 2004 |
| Focused Personal Training Limited | Arts & recreation | 2019 |
| Fogjoggers Ltd | Manufacturing | 2019 |
| Foil Secure Limited | Manufacturing | 2012 |
| Folad Healthcare Limited | Health & social care | 2022 |
| Foley Family Wines UK Limited | Wholesale & retail | 2023 |
| Folkactive CIC | Education | 2013 |
| Fone Revive 2 Ltd | Wholesale & retail | 2018 |
| Fontware Limited | Information & communication | 1997 |
| Food for Life Vrindavan UK Ltd | Education | 2006 |
| Food Garden Limited | Hospitality | 2020 |
| Food N Rush Limited | Hospitality | 2025 |
| Foodtalks (Southampton) Ltd | Hospitality | 2023 |
| Foody Moodies Ltd | Hospitality | 2024 |
| Foord & Co UK Ltd | Arts & recreation | 2009 |
| Foorge Music Ltd | Information & communication | 2019 |
| Footner & Ewing LLP | | 2017 |
| Footprint Copy & Design Limited | Manufacturing | 2008 |
| Footprint Dynamics Limited | Administrative & support | 2012 |
| Footsteps Eco-Lodge Limited | Administrative & support | 2004 |
| FOR People Group Ltd | Administrative & support | 2017 |
| Ford Farm Residents Association Limited | Households | 1979 |
| Ford Riverstone Property Group Ltd | Real estate | 2025 |
| Fordham and Chandra Consulting Services Ltd | Information & communication | 2010 |
| Foreman Steel Services Limited | Construction | 2017 |
| Forensic Medical UK Ltd | Real estate | 2008 |
| Foreship UK Limited | Professional & scientific | 2022 |
| Forest Accounts Ltd | Professional & scientific | 2020 |
| Forest Aviation Services 2026 Ltd | Professional & scientific | 2026 |
| Forest Brook Holdings Ltd | Real estate | 2023 |
| Forest Brook Investments Limited | Real estate | 2024 |
| Forest Compliance Training Ltd | Education | 2026 |
| Forest Cooling Limited | Energy | 2025 |
| Forest Copse Property Management Ltd | Real estate | 2022 |
| Forest Dog Academy Ltd | Other services | 2018 |
| Forest Edge Canine Hydrotherapy Ltd | Professional & scientific | 2020 |
| Forest Edge Fencing and Landscaping Ltd | Administrative & support | 2018 |
| Forest Edge Fencing Ltd | Construction | 2023 |
| Forest Edge Mortgages Limited | Financial services | 2003 |
| Forest Edge Thatchers (North) Ltd | Construction | 2026 |
| Forest Edge Thatchers (South) Ltd | Construction | 2026 |
| Forest Edge Thatchers Ltd | Construction | 2023 |
| Forest Edge Trustees and Secretaries Limited | Administrative & support | 2014 |
| Forest Financial Planning Group Limited | Financial services | 2022 |
| Forest Financial Planning Limited | Financial services | 2017 |