| Flavorcraft Catering Ltd | Hospitality | 2026 |
| Flavour ADS Limited | Professional & scientific | 2005 |
| Flavour Q Ltd | Hospitality | 2025 |
| Flavour Traders Limited | Manufacturing | 2017 |
| Flavours Cafe Limited | Hospitality | 2022 |
| Flavours of India Whitefield Limited | Hospitality | 2025 |
| Flavours of Lake District Ltd | Hospitality | 2021 |
| Flavours of Manchester Ltd | Administrative & support | 2025 |
| Flavours Scenting Limited | Manufacturing | 2025 |
| Flavoury NW Ltd | Hospitality | 2026 |
| Flawless Comms Ltd | Professional & scientific | 2025 |
| Flawless DE Fleur Ltd | Wholesale & retail | 2024 |
| Flawless Floors (M/Cr) Ltd | Wholesale & retail | 2016 |
| Flawless Floors Limited | Wholesale & retail | 2013 |
| Flawless Stone Ltd | Wholesale & retail | 2024 |
| Flawlessemma Ltd | Other services | 2025 |
| Flax & Co (Estate Agents) Limited | Real estate | 1993 |
| Flaxley Management Company Limited | Households | 1988 |
| Flaxmoss Gardens Management Company Limited | Households | 2016 |
| Flay Wings Ltd | Wholesale & retail | 2025 |
| FLB Property Services Ltd | Real estate | 2024 |
| Flbf Ltd | Financial services | 2025 |
| FLC Optical Ltd | Health & social care | 2026 |
| FLD Cuts Limited | Other services | 2026 |
| FLD Foods Limited | Hospitality | 2025 |
| FLD Nails Ltd | Other services | 2023 |
| Fleb the Game Ltd | Manufacturing | 2023 |
| Fleck Projects Limited | Construction | 2026 |
| Flecks Floh Ltd | Arts & recreation | 2024 |
| Fledge Labs Ltd | Education | 2026 |
| Fledglings Child Care Ltd | Health & social care | 2020 |
| Fleek Photos Limited | Information & communication | 2023 |
| Fleesh Limited | Construction | 2009 |
| Fleeson Ltd | Administrative & support | 2023 |
| Fleet AID Manchester Limited | Administrative & support | 2020 |
| Fleet and Bodyshop Solution Ltd | Wholesale & retail | 2018 |
| Fleet Angel Ltd | Professional & scientific | 2022 |
| Fleet Asphalt Ltd | Construction | 2021 |
| Fleet Assessors Limited | Wholesale & retail | 2021 |
| Fleet Builders Limited | | 1957 |
| Fleet Foods Ltd | Manufacturing | 2018 |
| Fleet Inspection Services Limited | Professional & scientific | 2006 |
| Fleet Lodge Farm Limited | Real estate | 2016 |
| Fleet Refrigeration Parts Ltd | Wholesale & retail | 2012 |
| Fleet Removal Ltd | Transport & logistics | 2026 |
| Fleet Solutions Network Limited | Wholesale & retail | 2012 |
| Fleet Tanking Ltd | Transport & logistics | 2025 |
| Fleet TEN Ltd | Wholesale & retail | 2020 |
| Fleetsure Limited | Professional & scientific | 2008 |
| Fleetwire Limited | Wholesale & retail | 2024 |
| Fleetwood Box Manufacturers Limited | Manufacturing | 1944 |
| Fleetwood Energy Investments Limited | Financial services | 2023 |
| Fleetwood Practice Limited | Health & social care | 2009 |
| Flekkmedia Limited | Information & communication | 2026 |
| Flemings Seals and Polymers Ltd | Manufacturing | 2018 |
| Flery Arrow Ltd | Information & communication | 2026 |
| Flesh Chambers Limited | Other services | 2022 |
| Flesh Tattoo Ltd | Other services | 2013 |
| Fletcher & Sons Landscaping, Driveways & Fencing Ltd | Water & waste | 2026 |
| Fletcher & Sons Property Solutions Ltd | Construction | 2025 |
| Fletcher Automotive Solutions Limited | Education | 2025 |
| Fletcher Bond Limited | Real estate | 2016 |
| Fletcher Bond Property Consulting Limited | Real estate | 2017 |
| Fletcher Moss Catering Ltd | Hospitality | 2025 |
| Fletcher Phillimore Ltd | Financial services | 2025 |
| Fletcher-Rae (UK) Limited | Professional & scientific | 2010 |
| Fletchers Solicitors Limited | Information & communication | 2006 |
| Fletchers Trust Corporation Limited | Professional & scientific | 2018 |
| Fleur DE Ioana Ltd | Wholesale & retail | 2024 |
| Fleurent Properties Ltd | Administrative & support | 2017 |
| Fleurescent Ltd | Manufacturing | 2025 |
| Fleuve DE Fleur Ltd | Wholesale & retail | 2024 |
| Flevo Trade Ltd | Wholesale & retail | 2017 |
| Flex 'N' Tone Limited | Health & social care | 1996 |
| Flex (UK) Artist Limited | Arts & recreation | 2024 |
| Flex Creative Limited | Professional & scientific | 2024 |
| Flex Davies Ltd | Construction | 2024 |
| Flex Fashions Limited | Wholesale & retail | 2023 |
| Flex Labs Ltd | Information & communication | 2026 |
| Flexabode Ltd | Hospitality | 2025 |
| Flexart Limited | Wholesale & retail | 2018 |
| Flexcart Ltd | Wholesale & retail | 2026 |
| Flexdane Holdings Limited | Financial services | 2024 |
| Flexdane Limited | Financial services | 2016 |
| Flexfit Therapy Ltd | Health & social care | 2024 |
| Flexfloor Ltd | Construction | 2026 |
| Flexgo Ltd | Wholesale & retail | 2026 |
| Flexi Transport Limited | Transport & logistics | 2024 |
| Flexible Business Interiors Holdings Limited | Administrative & support | 2016 |
| Flexible Business Interiors Limited | Administrative & support | 1992 |
| Flexible Commercial Space Limited | Transport & logistics | 2015 |
| Flexible Motors Ltd | Wholesale & retail | 2022 |
| Flexible Reinforcements Limited | Wholesale & retail | 1966 |
| FLEXIBLE108 Ltd | Wholesale & retail | 2023 |
| Flexiion Ltd. | Information & communication | 2009 |
| Flexil.Studio Ltd | Information & communication | 2025 |
| Flexilight Pro Limited | Wholesale & retail | 2021 |
| Fleximate Ltd | Wholesale & retail | 2026 |
| Fleximinder Preschool Limited | Education | 2017 |
| Flexion Ltd | Information & communication | 2025 |