| Fern and Farrow Farm Shop Ltd | Wholesale & retail | 2024 |
| Fern and Farrow Ltd | Hospitality | 2020 |
| Fern Building Surveyors Limited | Professional & scientific | 2024 |
| Fernley (Heathrow) Limited | Administrative & support | 2005 |
| Festability CIC | Arts & recreation | 2019 |
| Fever Films Ltd | Information & communication | 2024 |
| Feynsh Ltd | Real estate | 2021 |
| FFX Global Ltd | Administrative & support | 2020 |
| FGS Agri Limited | Agriculture & fishing | 1993 |
| FGS Energy Limited | Energy | 2018 |
| FGS Organics Limited | Water & waste | 2006 |
| FGS Utilities Limited | Construction | 2013 |
| FH Ventures Limited | Administrative & support | 2018 |
| Fibreonix Communications Ltd | Information & communication | 2026 |
| Fides Property Group Ltd | Real estate | 2021 |
| Fideum Ltd | Professional & scientific | 2015 |
| Field Electrical Ltd | Construction | 2025 |
| Field Technical Sales UK Ltd | Manufacturing | 2015 |
| FIG Support Services Ltd | Wholesale & retail | 2022 |
| Figo Gigo Limited | Wholesale & retail | 2025 |
| Fihankra Made Limited | Manufacturing | 2015 |
| Fill My Space Ltd | Information & communication | 2026 |
| Filton Motors Limited | Wholesale & retail | 2013 |
| Filton Repairs Ltd | Wholesale & retail | 2023 |
| Finalgood Property Management Limited | Households | 1996 |
| Financial Management (Dover) Ltd. | Professional & scientific | 2011 |
| Finches Friend Nature Limited | Wholesale & retail | 2021 |
| Find ME Technologies Ltd | Administrative & support | 2020 |
| Findlays Building Contractors Ltd | Construction | 2018 |
| Fine Concrete Ltd | Manufacturing | 2023 |
| Finesse Brickwork Services Ltd | Construction | 2025 |
| Finn Rail Ltd | Construction | 2021 |
| Finnca Limited | Real estate | 2021 |
| Fins Recruitment Ltd | Administrative & support | 2021 |
| Finserve Advisors Limited | Administrative & support | 2019 |
| FINTECH22 Limited | Financial services | 2024 |
| Fionex Enterprise Ltd | Wholesale & retail | 2025 |
| FIR Court Road Management Company Ltd | Households | 2017 |
| Firangis UK Limited | Wholesale & retail | 2020 |
| Fire Safe Global Ltd | Education | 2022 |
| Firefly FSC Ltd | Professional & scientific | 2020 |
| Fireplaces & Interiors of Kent Ltd | Wholesale & retail | 2025 |
| Fires and More Limited | Administrative & support | 2020 |
| Firmacom Limited | Administrative & support | 2016 |
| Firmpave Drives & Patios Ltd | Construction | 2024 |
| First AID Bespoke Services Ltd | Education | 2018 |
| First Choice Corporate Limited | Administrative & support | 1997 |
| First Choice Inflight Solutions Ltd | Administrative & support | 2006 |
| First Choice Staff Limited | Administrative & support | 2003 |
| First Class Kent Events Ltd | Hospitality | 2024 |
| First Elite Plant Hire Ltd | Construction | 2021 |
| First Elite Sales Ltd | Wholesale & retail | 2026 |
| First Learners' Nursery Limited | Education | 2016 |
| First Light Technologies (UK) Ltd | Information & communication | 2025 |
| First Steps Residential Ltd | Health & social care | 2023 |
| Firstequal Property Management Limited | Real estate | 1989 |
| Firstlookcv Ltd | Administrative & support | 2025 |
| Fishbourne Padel Limited | Arts & recreation | 2025 |
| Fisherman Ashford Ltd | Hospitality | 2025 |
| Fistral Property Limited | Real estate | 2008 |
| Fit OUT Construction Ltd | Construction | 2024 |
| Fitbot Ltd | Manufacturing | 2020 |
| Fito Ltd | Wholesale & retail | 2011 |
| Fitz YOU Limited | Professional & scientific | 2022 |
| Fitzpatrick Commercial Plumbing Group Limited | Financial services | 2018 |
| Fitzpatrick Commercial Plumbing Services Ltd | Construction | 2015 |
| Fitzwater Services Ltd | Construction | 2016 |
| Five Fields Finance Limited | Administrative & support | 2021 |
| Five Petals Psychological Services Ltd | Education | 2025 |
| FIX Crews Ltd | Construction | 2019 |
| Fixbase Limited | Construction | 2022 |
| Fixed Energy Ltd | Information & communication | 2025 |
| Fixings Warehouse Limited | Wholesale & retail | 2000 |
| Fizlil Limited | Financial services | 2025 |
| FJ Hills Limited | Construction | 2016 |
| FJ Prime Properties Limited | Real estate | 2024 |
| FJL (Kent) Holdings Limited | Financial services | 2022 |
| FJL Investments Limited | Hospitality | 2025 |
| Flacht Motorsport Ltd | Wholesale & retail | 2022 |
| Flat 1A TW Limited | Real estate | 2024 |
| Flat SIX Logistics Limited | Transport & logistics | 2018 |
| Flavours of Fusion Ltd | Hospitality | 2024 |
| Flawless Window Cleaning Ltd | Other services | 2023 |
| Fleet House Properties Ltd | Real estate | 2025 |
| Fleet Trak Limited | Wholesale & retail | 2006 |
| Fleming Performance Limited | Health & social care | 2011 |
| Fletcher and Burden Ltd | Real estate | 2021 |
| Flex and Flow Chiropractic Care Group Ltd | Other services | 2019 |
| Flex UK Go Ltd | Transport & logistics | 2025 |
| Flexpharma Ltd | Health & social care | 2025 |
| Flightpath Promotions Limited | Arts & recreation | 2026 |
| Flint Cottages 1 & 2 Limited | Real estate | 2024 |
| Flippin'Eck Ltd. | Professional & scientific | 2017 |
| FLO Tasker Ltd | Professional & scientific | 2018 |
| Floradyna Ltd | Wholesale & retail | 2026 |
| Floriculture International Limited | Wholesale & retail | 1994 |
| Flossie Lewis Education Support Company Ltd | Households | 2025 |
| Flossies Ltd | Hospitality | 2009 |
| Flourish Network CIC | Administrative & support | 2023 |
| Flourishstar Logistics Ltd | Transport & logistics | 2026 |