| Fired UP Media Ltd | Real estate | 2022 |
| Firefly Consulting Limited | Administrative & support | 2010 |
| First Directory Limited | Administrative & support | 2000 |
| Fishleys Orchard Management Company Limited | Households | 2021 |
| Fivexfive Consulting Ltd | Information & communication | 2024 |
| Fizz Logistics Limited | Administrative & support | 2010 |
| Flamingo Ventures Limited | Real estate | 2025 |
| Flecky Boul Limited | Hospitality | 2024 |
| Fleet(Line Markers)Limited | Manufacturing | 1957 |
| Fletch Bars and Events Limited | Hospitality | 2023 |
| Flexolite Limited | Extraterritorial | 2021 |
| Floor Barre Limited | Arts & recreation | 1998 |
| Floor Levelling Systems Limited | Wholesale & retail | 1998 |
| Florak Healthcare Limited | Health & social care | 2023 |
| Florence Accountants Limited | Professional & scientific | 2023 |
| Florence and Ottie Limited | Arts & recreation | 2018 |
| Flourish and Nourish (Malvern) Limited | Health & social care | 2024 |
| Flying Tech Limited | Wholesale & retail | 2015 |
| Flying Turtle Ltd | Wholesale & retail | 2025 |
| Foiling Services Ltd | Manufacturing | 2004 |
| Fontanero Ltd | Construction | 2015 |
| Food and Flower Fields Ltd | Agriculture & fishing | 2025 |
| Food Trac Limited | Wholesale & retail | 2003 |
| Food Wagon Ltd | Hospitality | 2025 |
| Football FUN Factory (Community 054) Limited | Arts & recreation | 2022 |
| Forrester Property Investments Ltd | Real estate | 2022 |
| Forte Managements Limited | Wholesale & retail | 2015 |
| Fortis Home Improvements Ltd | Construction | 2025 |
| Fortop Automation & Energy Control UK Limited | Wholesale & retail | 2012 |
| Fortress Technology (Europe) Limited | Manufacturing | 1999 |
| Forward Motors Limited | Wholesale & retail | 2003 |
| Fountain Court Management Limited | Households | 2000 |
| Four J Developments Ltd | Construction | 2019 |
| Four Seasons Management (NO.4) Limited | Households | 1993 |
| Fourteentwo Ltd | Construction | 2018 |
| FOX Town and Country Homes Limited | Real estate | 2021 |
| Foxhill Farm Holdings Limited | Financial services | 2024 |
| Foxley Tagg Planning Limited | Administrative & support | 2000 |
| Foxwood Technical Solutions Ltd | Information & communication | 2023 |
| FP PIC Ltd | Administrative & support | 2025 |
| Fractional HR Ltd | Administrative & support | 2024 |
| Francis Family Holdings Limited | Manufacturing | 2019 |
| Francis Investments (UK) Limited | Other services | 2011 |
| Frank and Theo Limited | Professional & scientific | 2025 |
| Free Mercers Road Limited | Households | 2017 |
| Freedom to Roam CIC | Arts & recreation | 2023 |
| Freeglobe Limited | Households | 1985 |
| Freehold 24 Priory Road Limited | Households | 2020 |
| Freeman Technology Limited | Manufacturing | 2003 |
| Fresh Approach Financial Planning Limited | Financial services | 2012 |
| Friar Street Insurance Consultants Limited | Financial services | 1999 |
| Friendz Consultancy Ltd | Professional & scientific | 2019 |
| Frolic Design Associates Limited | Professional & scientific | 2000 |
| Fryers Gate Freehold Management Limited | Households | 2019 |
| Fryers Gate Management Company Ltd | Households | 2015 |
| Fskt Ltd | Information & communication | 2023 |
| FSM Consulting Limited | Administrative & support | 2023 |
| Fuelled Group Ltd | Financial services | 2017 |
| Fullness in Life Ltd | Health & social care | 2015 |
| Funky Bunker Ltd. | Information & communication | 2014 |
| Fusion Abbey Park Limited | Wholesale & retail | 2006 |
| Fusion Alfrick Limited | Wholesale & retail | 2010 |
| Fusion Bracewell Limited | Wholesale & retail | 2011 |
| Fusion Bransford Limited | Wholesale & retail | 2010 |
| Fusion Broadway Limited | Wholesale & retail | 2010 |
| Fusion Brothwood Limited | Wholesale & retail | 2006 |
| Fusion Calis Limited | Wholesale & retail | 2006 |
| Fusion Carnoustie Limited | Wholesale & retail | 2002 |
| Fusion Charlton Limited | Wholesale & retail | 2010 |
| Fusion Crowle Limited | Wholesale & retail | 2010 |
| Fusion Dalaman Limited | Wholesale & retail | 2006 |
| Fusion Defford Limited | Wholesale & retail | 2010 |
| Fusion Dormington Limited | Wholesale & retail | 2002 |
| Fusion Driscoll Limited | Wholesale & retail | 2006 |
| Fusion Dumbleton Limited | Wholesale & retail | 2010 |
| Fusion Eastoe Limited | Wholesale & retail | 2011 |
| Fusion Elmbridge Limited | Wholesale & retail | 2010 |
| Fusion Everton Limited | Wholesale & retail | 2006 |
| Fusion Exning Limited | Wholesale & retail | 2009 |
| Fusion Fethiye Limited | Wholesale & retail | 2006 |
| Fusion Gatley Limited | Wholesale & retail | 2006 |
| Fusion Gocek Limited | Wholesale & retail | 2006 |
| Fusion Gray Limited | Wholesale & retail | 2011 |
| Fusion Harper Limited | Wholesale & retail | 2011 |
| Fusion Hartford Limited | Wholesale & retail | 2011 |
| Fusion Hawstead Limited | Wholesale & retail | 2009 |
| Fusion Head Street Limited | Wholesale & retail | 2006 |
| Fusion Heath Limited | Wholesale & retail | 2011 |
| Fusion Irvine Limited | Wholesale & retail | 2011 |
| Fusion Kaitaia Limited | Wholesale & retail | 2006 |
| Fusion Kroma Limited | Wholesale & retail | 2002 |
| Fusion Krone Limited | Wholesale & retail | 2006 |
| Fusion Littleworth Limited | Wholesale & retail | 2006 |
| Fusion Madeley Limited | Wholesale & retail | 2002 |
| Fusion Newlands Limited | Wholesale & retail | 2006 |
| Fusion Niamh Limited | Wholesale & retail | 2006 |
| Fusion Pershore Limited | Wholesale & retail | 2006 |
| Fusion Priest Lane Limited | Wholesale & retail | 2006 |
| Fusion Samui Limited | Wholesale & retail | 2006 |
| Fusion Soham Limited | Wholesale & retail | 2009 |