| Flores Catering Ltd. | Hospitality | 2020 |
| Florian B Ltd | Transport & logistics | 2019 |
| Florin Badarau Ltd | Transport & logistics | 2024 |
| Florin Buiding Services Limited | Administrative & support | 2025 |
| Floristiq Leeds Ltd | Wholesale & retail | 2024 |
| Florit Consulting Limited | Administrative & support | 2018 |
| Florri-Feme Pharmaceuticals Ltd. | Manufacturing | 1998 |
| Floss Boss Ltd | Wholesale & retail | 2023 |
| Flosslyos Ltd | Information & communication | 2026 |
| Flossmore Way Park Management Limited | Real estate | 2016 |
| Flourish at Lymm Dental Limited | Health & social care | 2022 |
| Flourish Beauty Ltd | Wholesale & retail | 2025 |
| Flourish Business Limited | Administrative & support | 2025 |
| Flourish by MA Limited | Health & social care | 2022 |
| Flourish Ventures Ltd | Manufacturing | 2011 |
| Flow - Plumbing & Electrical Store Ltd | Wholesale & retail | 2024 |
| Flow Coaching & Consulting Ltd | Professional & scientific | 2023 |
| Flow Dream Link Limited | Information & communication | 2025 |
| Flow Tech Engineers Ltd | Construction | 2024 |
| Flow Technologies Ltd | Manufacturing | 2019 |
| Floway Mechanical Solutions Limited | Construction | 2023 |
| Flower Garden Properties Ltd | Real estate | 2025 |
| Flower Tots Limited | Health & social care | 2021 |
| Flowerhill Cafe Ltd | Hospitality | 2025 |
| Flowers by Karen (Leeds) Limited | Wholesale & retail | 2026 |
| Flownest Ltd | Professional & scientific | 2026 |
| Flownetic Group Ltd | Wholesale & retail | 2026 |
| Flowstack AI Ltd | Information & communication | 2025 |
| Flowtech Utilities Limited | Construction | 2024 |
| Floyd Automatic Tooling Limited | Wholesale & retail | 1990 |
| Fluctuation Ltd | Information & communication | 2023 |
| Fluere Ltd | Professional & scientific | 2013 |
| Fluffy Tails Dog Services Limited | Other services | 2021 |
| Fluid Capital Investments Ltd | Construction | 2021 |
| Fluid Movement Coach Ltd | Education | 2025 |
| Fluid Structural Engineers & Technical Designers Limited | Professional & scientific | 1999 |
| Fluidit Consulting Group Ltd | Professional & scientific | 2015 |
| Fluidit Group Ltd | Financial services | 2023 |
| Fluorochain Ltd | Wholesale & retail | 2026 |
| Fluorspar Ventures Limited | Mining & quarrying | 2021 |
| Flux FM Limited | Wholesale & retail | 2020 |
| Fluxuswave Productions Ltd | Wholesale & retail | 2026 |
| Flxflight Limited | Administrative & support | 2018 |
| FLY Away Today Ltd | Wholesale & retail | 2025 |
| FLY Consular Ltd | Professional & scientific | 2026 |
| FLY Video Limited | Information & communication | 2011 |
| FLY Visuals Ltd | Professional & scientific | 2019 |
| Flyby Locums Ltd | Other services | 2024 |
| Flyde Coast Motors Limited | Wholesale & retail | 2018 |
| Flyerfox Limited | Professional & scientific | 2025 |
| Flying Dragon Yorkshire Ltd | Hospitality | 2023 |
| Flying Horse Farm Management Company Limited | Households | 2023 |
| Flying Pizza & Taste of India Ltd | Hospitality | 2001 |
| Flyingbirds Connections Limited | Wholesale & retail | 2026 |
| Flynn Brickwork Ltd | Construction | 2026 |
| Flynn Social Work Services Ltd | Health & social care | 2022 |
| Flyte Futures Limited | Administrative & support | 2024 |
| FLZ Neighbourhood Goods Ltd | Wholesale & retail | 2023 |
| FM Armley Limited | Wholesale & retail | 2023 |
| FM Medica Ltd | Health & social care | 2025 |
| Fmak Accounting Services (FAS) Ltd | Professional & scientific | 2007 |
| Fmba Limited | Professional & scientific | 2011 |
| Fmcg Connect Ltd. | Administrative & support | 2011 |
| Fmcg Global Limited | Administrative & support | 2020 |
| Fmed Ltd | Health & social care | 2019 |
| Fmhg Ltd | Construction | 2022 |
| FMI Limited | Information & communication | 1983 |
| FMI Products Limited | Wholesale & retail | 2007 |
| FMJ Demir Property Limited | Real estate | 2025 |
| FMP (Yorkshire) Ltd | Construction | 2006 |
| FMP Mechanical Ltd | Construction | 2020 |
| FMS Forensic Medical Services Ltd | Administrative & support | 2009 |
| FMS Savings Limited | Real estate | 2012 |
| FMW Consultancy Ltd | Professional & scientific | 2006 |
| Fmwrtrans Ltd | Real estate | 2026 |
| FN Scientific Solutions Ltd | Health & social care | 2016 |
| FNI Homes Ltd | Real estate | 2025 |
| FNS Elite Ltd | Transport & logistics | 2025 |
| FNT Textile Ltd | Wholesale & retail | 2021 |
| Foam Factory Ltd | Manufacturing | 2020 |
| Fobella Housing Limited | Real estate | 2024 |
| Focalserve Limited | Wholesale & retail | 2003 |
| Focus Branding Limited | Manufacturing | 2012 |
| Focus Drop Ltd | Transport & logistics | 2026 |
| Focus Fireplaces (Holdings) Limited | Manufacturing | 2000 |
| Focus In-Depth Limited | Professional & scientific | 2014 |
| Focus VR Limited | Information & communication | 2017 |
| Focus Word Ministry Ltd | Other services | 2024 |
| Focused Ltd | Wholesale & retail | 2025 |
| Focuz-Group Ltd | Wholesale & retail | 2026 |
| Foday Kemo Orphanage CIC | Health & social care | 2025 |
| FOG Fellow Designs Ltd | Manufacturing | 2019 |
| Fogroom Limited | Wholesale & retail | 2019 |
| Folades Fashion House Limited | Professional & scientific | 2025 |
| Folajok Ltd | Health & social care | 2019 |
| Folded Plane Limited | Information & communication | 2016 |
| Folding Sliding Doors Limited | Manufacturing | 2001 |
| Folk & Lore Ltd | Hospitality | 2025 |
| Folk Engineering Services Ltd | Professional & scientific | 2025 |
| Folk Recruitment Limited | Administrative & support | 2018 |