| FJ Ports (Holdings) Ltd | Professional & scientific | 2024 |
| FJ Ports (Silloth) Ltd | Transport & logistics | 2024 |
| FJP Property Solutions Limited | Construction | 2025 |
| FJS Developments (North West) Ltd | Construction | 2019 |
| FJS Rigging & Construction Limited | Construction | 2019 |
| FL 33480 Limited | Real estate | 2025 |
| FLA Property Development Limited | Real estate | 2016 |
| Flair Activewear Ltd | Wholesale & retail | 2026 |
| Flair Space Ltd | Construction | 2023 |
| Flaire Collective Ltd | Hospitality | 2025 |
| Flame and Fries Ltd | Hospitality | 2025 |
| Flamed WOK Blackpool Ltd | Hospitality | 2026 |
| Flamed WOK Ltd | Hospitality | 2021 |
| Flawless Beauty Aesthetics Ltd | Other services | 2018 |
| Flawless Boutique Ltd | Other services | 2022 |
| Flawless Finishes NW Ltd | Construction | 2026 |
| Flawless TCG Ltd | Wholesale & retail | 2026 |
| Fleektail Ltd | Wholesale & retail | 2025 |
| Fleetwood Building Company,Limited | Construction | 1931 |
| Fleetwood Eats Limited | Hospitality | 2021 |
| Fleetwood Produce Limited | Wholesale & retail | 2006 |
| Flex Able Staffing Ltd | Administrative & support | 2025 |
| Flex and PAY Limited | Information & communication | 2026 |
| Flexseal Limited | Manufacturing | 2008 |
| Flightflare Ltd | Administrative & support | 2023 |
| Flints Media Ltd | Professional & scientific | 2015 |
| Floorshow Ltd | Wholesale & retail | 2011 |
| Flow Creative Limited | Professional & scientific | 2014 |
| Flowhuman Limited | Information & communication | 2017 |
| Floyd Consultancy Ltd | Wholesale & retail | 2024 |
| FLR Procurement Limited | Construction | 2018 |
| Flsl Limited | Information & communication | 2021 |
| Fluffed & Buffed Ltd | Other services | 2024 |
| Flupoly Ltd | Information & communication | 2026 |
| Flying Yacht Ltd | Extraterritorial | 2018 |
| Flynn Properties Management & Maintenance Ltd | Households | 2025 |
| Flynncrypt Ltd | Information & communication | 2015 |
| Flynntellectual Property Ltd | Administrative & support | 2016 |
| Flysmart Aviation Limited | Transport & logistics | 2017 |
| FM Specialist Sourcing Limited | Wholesale & retail | 2024 |
| FM106 Consulting Limited | Professional & scientific | 2017 |
| FNB Properties Limited | Real estate | 2026 |
| Focal NDT Ltd | Professional & scientific | 2023 |
| Focus and Feel Ltd | Wholesale & retail | 2025 |
| Focus General Management NW Limited | Public administration | 2015 |
| Focus Maintenance Limited | Construction | 2001 |
| Folk Theorem Limited | Professional & scientific | 2026 |
| Folklore Ltd | Other services | 2017 |
| Follow My LED Ltd | Administrative & support | 2016 |
| Followglobal Limited | Construction | 1991 |
| Food for ALL Private Limited | Hospitality | 2025 |
| Food Place Ltd | Hospitality | 2025 |
| FOOD2GO Blackpool Ltd | Hospitality | 2026 |
| Foodblackpool Ltd | Hospitality | 2019 |
| Footsie Digikal Riddim Studio Ltd | Information & communication | 2018 |
| FOR Keeps Design Limited | Wholesale & retail | 2019 |
| Force Accounting Ltd | Professional & scientific | 2012 |
| Force Technology Limited | Manufacturing | 2015 |
| Force Technology Performance Products Ltd | Manufacturing | 2025 |
| Ford Roofing and Building Ltd | Construction | 2026 |
| Foreco Maintenance Ltd | Manufacturing | 2023 |
| Forest Gate Management Company (Lytham) Limited | Households | 2022 |
| Forestside Goods Ltd | Wholesale & retail | 2025 |
| Foreverbound Driveways Ltd | Construction | 2025 |
| Forex Millionaires Club T/A Number 10 Ltd | Hospitality | 2025 |
| Forge Active Education Ltd | Education | 2026 |
| Forge Fuel Performance Ltd | Manufacturing | 2026 |
| Forge Project Forensics Limited | Information & communication | 2018 |
| Form Design Architectural Services Ltd | Professional & scientific | 2021 |
| Forma Systems Limited | Manufacturing | 2024 |
| Formby Eats Limited | Hospitality | 2026 |
| Formby Tool Hire Limited | Construction | 1985 |
| Formica Solutions Limited | Information & communication | 2022 |
| Formulation Hair Limited | Other services | 2019 |
| Forrest Court Management Co. Limited | Households | 1991 |
| Fortitude Residential Childcare Ltd | Health & social care | 2023 |
| Forward Ever Designs Ltd | Wholesale & retail | 2023 |
| Forward Financial Consulting Limited | Professional & scientific | 2017 |
| Forward Mobility Limited | Wholesale & retail | 2018 |
| Fosse Media Ltd | Administrative & support | 2016 |
| Foulds Transport Services Ltd | Transport & logistics | 2019 |
| Foundry Accountants Ltd | Professional & scientific | 2026 |
| Fountain Bathrooms & Kitchens Ltd. | Other services | 1994 |
| Four Circles Properties Ltd | Real estate | 2023 |
| Four Piers Consulting Ltd | Other services | 2024 |
| Four Saplings Estate Limited | Real estate | 2025 |
| Four Seasons Fisheries Limited | Agriculture & fishing | 2007 |
| Fouracre Puls Ltd | Wholesale & retail | 2025 |
| Fournir Limited | Extraterritorial | 2005 |
| Fourth Arch Ltd | Professional & scientific | 2013 |
| FOX & FLO Limited | Other services | 2025 |
| FOX Brothers (Bacup) Limited | Mining & quarrying | 2020 |
| FOX Brothers (Lancashire) Ltd | Construction | 2010 |
| FOX Brothers (Leyland) Ltd | Mining & quarrying | 1984 |
| FOX Brothers (Westby) Limited | Professional & scientific | 2022 |
| FOX Brothers Holdings Limited | Financial services | 2022 |
| FOX Hairdressing Ltd | Other services | 2013 |
| FOX Harper Wholesales Supplies Ltd | Wholesale & retail | 2024 |
| FOX Managed Services Ltd | Administrative & support | 2021 |
| Foxglove Green Ltd | Wholesale & retail | 2025 |