| Flightandtours Ltd. | Administrative & support | 2016 |
| Flights & Hotels Ltd | Other services | 2018 |
| Flights Conference Services Limited | Administrative & support | 1985 |
| Flightsplanner Ltd | Administrative & support | 2024 |
| Flinca Limited | Information & communication | 2010 |
| Flinkar Limited | Construction | 2016 |
| Flint Green Motors Limited | Wholesale & retail | 2025 |
| Flint Hall Investments | Financial services | 2026 |
| Flint Impex LP | | 2017 |
| Flintoft Ltd | Professional & scientific | 2025 |
| Flip 180 Consulting Ltd | Professional & scientific | 2023 |
| Flip DA Script CIC | Education | 2025 |
| Flip Properties Ltd | Real estate | 2023 |
| Flip Vault Limited | Wholesale & retail | 2025 |
| Flip'N Ltd | Hospitality | 2023 |
| Flipco Ltd | Wholesale & retail | 2025 |
| Flippin N Grillin Ltd | Hospitality | 2025 |
| Flipping Bricks Ltd | Real estate | 2019 |
| Flipping OUT Gymnastics Ltd | Arts & recreation | 2022 |
| Flipproperts Ltd | Construction | 2025 |
| Flirt Hair & Beauty Limited | Other services | 2014 |
| Flisek Properties Ltd | Real estate | 2025 |
| Flit Medical Ltd | Health & social care | 2024 |
| Flix Health Limited | Health & social care | 2025 |
| FLO Business Ltd | Transport & logistics | 2025 |
| FLO Cleanin Ltd | Administrative & support | 2026 |
| FLO Marketing Limited | Professional & scientific | 2018 |
| FLO Rider Limited | Transport & logistics | 2017 |
| FLO Shoes UK Limited | Wholesale & retail | 2022 |
| Floannt Ltd | Transport & logistics | 2021 |
| Floating Isle Commercial Ltd | Construction | 2026 |
| Flomat Trans Ltd | Transport & logistics | 2023 |
| Flood and Forge Limited | Wholesale & retail | 2026 |
| Floodgate Street Limited | Wholesale & retail | 2019 |
| Flooid Bidco Limited | Financial services | 2017 |
| Flooid EBT Limited | Administrative & support | 2020 |
| Flooid Limited | Information & communication | 1979 |
| Flooid Midco Limited | Financial services | 2017 |
| Floor R US Limited | Wholesale & retail | 2016 |
| Floor Solutions Ltd | Construction | 2025 |
| Floor Station Ltd | Wholesale & retail | 2025 |
| Floor to Ceiling Interiors Ltd. | Wholesale & retail | 1992 |
| Flooring by Design Limited | Construction | 2011 |
| Flooring Centre Birmingham Ltd | Wholesale & retail | 2019 |
| Flooring Direct Midlands Ltd | Construction | 2024 |
| Flooring Experts Ltd | Construction | 2026 |
| Flooring Logistics Ltd | Extraterritorial | 2013 |
| Flooring Sales Direct Ltd | Extraterritorial | 2013 |
| Flooring Styles Limited | Construction | 2012 |
| Flooring Wise Limited | Wholesale & retail | 2024 |
| Floors 2 Go Ltd | Wholesale & retail | 2024 |
| Floors Direct Midlands Ltd | Wholesale & retail | 2010 |
| Floors Extra Ltd | Wholesale & retail | 2025 |
| Floors to Fit Ltd | Construction | 2021 |
| Floorshub UK Ltd | Manufacturing | 2023 |
| Floorworxs Midlands Limited | Construction | 2026 |
| Flora & Curl Ltd | Wholesale & retail | 2016 |
| Flora Catering Ltd | Manufacturing | 2023 |
| Flora Fabrication Limited | Manufacturing | 2024 |
| Flora Lodgings Investments Ltd | Real estate | 2021 |
| Flora Motor Engineers Limited | Wholesale & retail | 2014 |
| Flora Motor Hire Limited | Administrative & support | 2008 |
| Flora Trans Ltd | Transport & logistics | 2015 |
| Florab Integrated Options Limited | Wholesale & retail | 2025 |
| Floral Bites Ltd | Wholesale & retail | 2023 |
| Floral Occasions Limited | Wholesale & retail | 2010 |
| Florascent Duftmanufaktur Ltd | Wholesale & retail | 2005 |
| Flordecor Ltd | Construction | 2022 |
| Florea E Ionut Ltd | Transport & logistics | 2018 |
| Florence Medicare Ltd | Health & social care | 2023 |
| Florence Susan Limited | Real estate | 2021 |
| Florentina Resources Ltd | Health & social care | 2018 |
| Florents Property Solutions Ltd | Real estate | 2025 |
| Flori Impex Ltd | Transport & logistics | 2025 |
| Florian Healthcare Ltd | Health & social care | 2025 |
| Florida Cafe Ltd | Administrative & support | 2016 |
| Florin Decorating Ltd | Construction | 2019 |
| Florin PIU Ltd | Transport & logistics | 2018 |
| Florin Vasile Limited | Transport & logistics | 2025 |
| Florincirstea Ltd | Transport & logistics | 2023 |
| Florinfast Ltd | Transport & logistics | 2025 |
| Florintzo Ltd | Health & social care | 2018 |
| Floristry and Co Limited | Administrative & support | 2025 |
| Flos Medical Ltd | Health & social care | 2023 |
| Flossy Lady Ltd | Wholesale & retail | 2021 |
| Flour Power Group Limited | Hospitality | 2019 |
| Flour Power Holdco 2 Limited | Professional & scientific | 2019 |
| Flour Power Holdco Limited | Professional & scientific | 2019 |
| Flour Power Marketing Limited | Professional & scientific | 2019 |
| Flouri App Limited | Information & communication | 2026 |
| Flourish Education Ltd. | Administrative & support | 2010 |
| Flourish Medical Limited | Administrative & support | 2024 |
| Flourish Property Holdings Limited | Households | 2023 |
| Flourish Recruitment Group Limited | Professional & scientific | 2018 |
| Flourish Tutoring Limited | Education | 2021 |
| Flourish Your Events Ltd | Hospitality | 2024 |
| Flourishing Care Services Ltd | Administrative & support | 2024 |
| Flourishing Minds Psychology Ltd | Education | 2020 |
| Flourishing Psychology Service Limited | Extraterritorial | 2023 |
| Flow AI (Automated Intelligence) Limited | Information & communication | 2020 |