| Excool Limited | Energy | 2010 |
| Excoolspace Limited | Extraterritorial | 2015 |
| Executive Clinical Services Limited | Health & social care | 2002 |
| Exhibit Interactive Holdings Limited | Administrative & support | 2023 |
| Exhibit Interactive Limited | Administrative & support | 2014 |
| Extrusion Developments Ltd | Manufacturing | 2015 |
| Extrutech Limited | Administrative & support | 2015 |
| Eyecan Ventures Limited | Wholesale & retail | 2007 |
| Eyerudio Ltd | Health & social care | 2015 |
| F Bradshaw Design Limited | Arts & recreation | 2024 |
| FAB Food Events Limited | Hospitality | 2025 |
| Facearmlet Ltd | Wholesale & retail | 2018 |
| Fairfield Labels Limited | Manufacturing | 1982 |
| Fairway Hydraulics Limited | Manufacturing | 2002 |
| Fairway Systems LLP | | 2017 |
| Faithful City Living Ltd | Real estate | 2025 |
| Falcon Boutique Ltd | Construction | 2020 |
| Falcon Contract Flooring Ltd | Construction | 2020 |
| Falcon Contract Flooring Sales Limited | Construction | 2003 |
| Falcon Flooring Ltd | Construction | 2020 |
| Fallowfield (Droitwich) Limited | Information & communication | 2011 |
| Farnfield Financial Ltd | Professional & scientific | 2025 |
| Fashion LAB K&P Ltd | Wholesale & retail | 2022 |
| Fauna Strength Ltd | Arts & recreation | 2020 |
| Fawley Fishery Ltd | Arts & recreation | 2022 |
| FCF Group Limited | Administrative & support | 2022 |
| FCF Holdings Limited | Administrative & support | 2018 |
| FCF Topco Limited | Administrative & support | 2024 |
| Feast Fare Limited | Manufacturing | 2006 |
| Ferg Lettings Ltd | Real estate | 2019 |
| Fernwood Consulting Services Ltd | Information & communication | 2025 |
| FH Walker Accounts Ltd | Professional & scientific | 2024 |
| FHL Holdings Limited | Financial services | 2016 |
| Fiddian-Green Properties Limited | Real estate | 2017 |
| Fidelity Estates Limited | Extraterritorial | 2013 |
| Field Holdings Limited | Administrative & support | 2002 |
| Fieldview Property Group Limited | Real estate | 2026 |
| FIG Publishing Ltd | Information & communication | 2022 |
| Figment Property Ltd | Real estate | 2025 |
| Filmer Properties Limited | Real estate | 2026 |
| Finesse Lifestyle Limited | Wholesale & retail | 2022 |
| Finesse Motor Ltd | Wholesale & retail | 2022 |
| Finest Care Services Ltd | Health & social care | 2016 |
| Finest Instruments Limited | Wholesale & retail | 2014 |
| Finetimes Clothing Limited | Wholesale & retail | 2023 |
| Fink Property Ltd | Real estate | 2018 |
| Finn Medical Services Ltd | Health & social care | 2023 |
| Fire Safety Training and Support Ltd | Education | 2014 |
| First Impression Cleaning Service Limited | | 1989 |
| First Phase Properties Ltd | Real estate | 2025 |
| First Third Productions Ltd | Arts & recreation | 2025 |
| Fiscus Wealth Limited | Financial services | 2021 |
| Fisher Foundries Limited | Extraterritorial | 1914 |
| Fisher Performance Cars Limited | Wholesale & retail | 2017 |
| Fisher Restoration (Bodyshop) Limited | Wholesale & retail | 2015 |
| Fisher Restoration (DES) Ltd | Wholesale & retail | 2019 |
| Fisher Restoration Ltd | Wholesale & retail | 1982 |
| Fitness Gifts Limited | Wholesale & retail | 2023 |
| Fitrodiers Ltd | Hospitality | 2024 |
| Fixlegal Ltd | Professional & scientific | 2019 |
| Fixula Limited | Health & social care | 2024 |
| FKD Developments Ltd | Real estate | 2019 |
| Flag Meadow Management Limited | Professional & scientific | 2007 |
| Flare GUN Studios Ltd | Information & communication | 2024 |
| Flawist Ltd | Administrative & support | 2024 |
| Flaxen Ltd | Other services | 2018 |
| Fleeshman Limited | Arts & recreation | 2023 |
| Fleet Street Sport & Media Group Limited | Arts & recreation | 2016 |
| Fletcher Homes (Droitwich) Ltd | Construction | 2019 |
| Flinn Wulff Limited | Real estate | 2024 |
| Flip Cards Limited | Information & communication | 2001 |
| Flocomm Limited | Construction | 1998 |
| Flowers of Elegance Limited | Wholesale & retail | 2015 |
| FLP Entertainment Ltd | Arts & recreation | 2012 |
| Flux Aesthetics Limited | Wholesale & retail | 2022 |
| Flux Clinics Limited | Health & social care | 2022 |
| Flyford & Forest Properties Limited | Real estate | 2024 |
| Flyford Food Company LLP | | 2013 |
| Flying Cargo Company Ltd | Transport & logistics | 2025 |
| FM Concierge Limited | Information & communication | 2019 |
| Foodsafe Stainless Limited | Administrative & support | 2011 |
| Ford Farm Ltd | Agriculture & fishing | 2018 |
| Foredraught Limited | Professional & scientific | 2009 |
| Forefront Care Solutions Limited | Health & social care | 2018 |
| Forefront Technology Solutions Limited | Administrative & support | 2025 |
| Foremics Ltd | Hospitality | 2024 |
| Fortuna Films Ltd | Information & communication | 2024 |
| Fortune Life Care Group Limited | Health & social care | 2023 |
| Fortune Life Care Homes Limited | Health & social care | 2023 |
| Fortune Life Property Ltd | Real estate | 2021 |
| Foster Health Ltd | Real estate | 2020 |
| Foundryflm Limited | Information & communication | 2026 |
| Four Laws Distilling Company Limited | Manufacturing | 2022 |
| Four Squared Recruitment Ltd | Administrative & support | 2018 |
| Fowler-Wright Properties Limited | Real estate | 2022 |
| FOX Systems Ltd | Construction | 2025 |
| Foxley Building Company Limited | Construction | 2018 |
| Foxley Property Solutions Limited | Real estate | 2023 |
| Foxley Trade Windows Ltd | Construction | 2020 |
| Foxtar Ltd | Information & communication | 2024 |