| Fluent UK Bidco I Limited | Financial services | 2025 |
| Fluestatic Games Ltd | Information & communication | 2025 |
| Fluiconnecto UK Ltd | Manufacturing | 1989 |
| Fluid Commerce Limited | Information & communication | 2009 |
| Fluid Marketplaces Limited | Professional & scientific | 2024 |
| Fluid Recruitment Limited | Administrative & support | 2024 |
| Fluidfile Developments Limited | Professional & scientific | 2018 |
| Fluidity Digital Ltd | Professional & scientific | 2020 |
| Fluidmax Limited | Administrative & support | 2023 |
| Flush IT Plumbing Ltd | Construction | 2018 |
| Flux Arabia Trading Limited | Wholesale & retail | 2025 |
| Flux Automotive Group Ltd | Administrative & support | 2026 |
| Flux Blends Ltd | Health & social care | 2024 |
| Flux Designs Ltd | Professional & scientific | 2022 |
| Flux Electrical Ltd | Wholesale & retail | 2026 |
| Flux for Trading & Services Limited | Extraterritorial | 2026 |
| Flux Integration Limited | Construction | 2015 |
| Flux Physiotherapy Ltd | Other services | 2025 |
| Flux Sports Therapy Ltd | Other services | 2025 |
| Fluxbloom Global Services Ltd | Extraterritorial | 2025 |
| Fluxcart Commerce Limited | Wholesale & retail | 2026 |
| Fluxera Novyra Trading Ltd | Extraterritorial | 2026 |
| Fluxglow Investments Ltd | Extraterritorial | 2025 |
| Fluxion Global Engineering Ltd | Other services | 2021 |
| Fluxity Limited | Wholesale & retail | 2023 |
| Fluxnest Trading Group Ltd | Extraterritorial | 2025 |
| Flwsh Ltd | Information & communication | 2025 |
| FLY Arena Ltd | Administrative & support | 2025 |
| FLY Business Ltd | Administrative & support | 2024 |
| FLY by Night Clothing Limited | Manufacturing | 2021 |
| FLY Dragon Ltd | Extraterritorial | 2017 |
| FLY East Travel Limited | Administrative & support | 2017 |
| FLY High Competitions Ltd | Arts & recreation | 2025 |
| FLY High Fitness Ltd | Arts & recreation | 2026 |
| FLY International Trading Ltd | Wholesale & retail | 2013 |
| FLY ME Airways Ltd | Transport & logistics | 2025 |
| FLY on the Wall PR Ltd | Professional & scientific | 2022 |
| FLY Seller Ltd | Wholesale & retail | 2024 |
| FLY Vape Ltd | Wholesale & retail | 2023 |
| FLY With US Limited | Administrative & support | 2025 |
| FLY Young International Ltd | Transport & logistics | 2023 |
| Flyalbatrossfly Ltd | Information & communication | 2019 |
| Flybaze Logistics Ltd | Wholesale & retail | 2023 |
| Flybondi Limited | Transport & logistics | 2016 |
| Flyd AI Limited | Information & communication | 2025 |
| Flyfield Limited | Households | 1983 |
| Flyhomes Ltd | Real estate | 2021 |
| Flying AC Ltd | Transport & logistics | 2024 |
| Flying Crossroads Union Ltd | Wholesale & retail | 2022 |
| Flying Expand Limited | Wholesale & retail | 2023 |
| Flying Horse Auto Hire Ltd | Administrative & support | 2019 |
| Flying Horse Manchester Ltd | Transport & logistics | 2018 |
| Flying PIG and Lobster Limited | Hospitality | 2013 |
| Flying Solutions (UK) Limited | Administrative & support | 2006 |
| Flying Spaghetti Monster Ltd | Information & communication | 2015 |
| Flykick Design and Media Ltd | Professional & scientific | 2018 |
| Flymac Limited | Wholesale & retail | 2017 |
| Flynn Energy Networks Limited | Construction | 2008 |
| Flynn Family Investments Ltd | Financial services | 2025 |
| Flynn Scanlon Properties Limited | Real estate | 2024 |
| Flynn Utilities & Surfacing Limited | Arts & recreation | 1996 |
| Flynn's Park Homes Ltd | Hospitality | 2022 |
| Flynnco Ltd | Information & communication | 2025 |
| Flyport Travel Ltd | Administrative & support | 2023 |
| Flysimm Ltd | Information & communication | 2018 |
| Flyspace UK Ltd | Wholesale & retail | 2024 |
| Flytex Ltd | Wholesale & retail | 2019 |
| Flywheel Secondary I, Bolt Pref SPV I 2024 LLP | | 2024 |
| FM Amazon Limited | Wholesale & retail | 2025 |
| FM Apparel Ltd | Wholesale & retail | 2018 |
| FM Assessment Limited | Health & social care | 2023 |
| FM Car Wash Ltd | Administrative & support | 2026 |
| FM Care Solutions Ltd | Health & social care | 2020 |
| FM Companion Ltd | Information & communication | 2025 |
| FM Creatives Ltd | Arts & recreation | 2026 |
| FM Extrusion Limited | Manufacturing | 2011 |
| FM Investments North West Ltd | Households | 2022 |
| FM Maintenance Services Ltd | Real estate | 2023 |
| FM Marketing Ltd | Professional & scientific | 2018 |
| FM Medical Group Ltd | Wholesale & retail | 2022 |
| FM Online Limited | Wholesale & retail | 2023 |
| FM Project Consultants Ltd | Construction | 2012 |
| FM Properties North West Ltd | Real estate | 2022 |
| FM Property (London) Limited | Households | 2022 |
| FM Property Solutions North West Ltd | Households | 2022 |
| FM Publications Limited | Information & communication | 2019 |
| FM Store UK Ltd | Wholesale & retail | 2026 |
| FM Wastewater and Environmental Ltd | Professional & scientific | 2025 |
| Fmaa Ltd | Health & social care | 2017 |
| FMB Group Ltd | Wholesale & retail | 2020 |
| FMB Medical Limited | Health & social care | 2011 |
| Fmbee Limited | Administrative & support | 2014 |
| FMC Experts Limited | Other services | 2023 |
| FMC Recovery (NW) Limited | Wholesale & retail | 2023 |
| Fmcg Global Distributor Ltd | Wholesale & retail | 2023 |
| Fmcg Jobs Ltd | Professional & scientific | 2020 |
| Fmcorp Ltd | Wholesale & retail | 2023 |
| FMD Developers Ltd | Real estate | 2024 |
| FME East Ltd | Professional & scientific | 2021 |
| FME West Ltd | Wholesale & retail | 2021 |