| Excel Carpet Cleaning Limited | Other services | 2008 |
| Exchange Holdings (UK) Limited | Professional & scientific | 2011 |
| Exclusive Homes Limited | Real estate | 2007 |
| Exclusive Removals Limited | Transport & logistics | 2011 |
| Excobe Limited | Wholesale & retail | 2005 |
| Executive Skys Limited | Professional & scientific | 2003 |
| Exelvia Group Ltd | Administrative & support | 2025 |
| Expanded Properties Ltd | Real estate | 2025 |
| Exquisite Event Hire Ltd | Administrative & support | 2022 |
| Exsealants Limited | Construction | 2009 |
| Extensions Darling Limited | Wholesale & retail | 2026 |
| F.P. Blake & Sons Ltd | Transport & logistics | 2001 |
| Fairbrother Travel Limited | Administrative & support | 2025 |
| Fairway Plumbing & Heating Limited | Other services | 2008 |
| Fairways Communications Limited | Professional & scientific | 2017 |
| Fairytale Finishes Ltd | Administrative & support | 2020 |
| Falconpower Property Management Limited | Households | 1984 |
| Falvion Limited | Administrative & support | 2024 |
| Familiam Limited | Information & communication | 2013 |
| Familya Care Services Mid-Essex Ltd | Health & social care | 2026 |
| Farmer & Schelvis Construction Limited | Construction | 2006 |
| Farmers Yard Limited | Hospitality | 2015 |
| FAS Construction Limited | Construction | 2021 |
| Fastrack Holdings Limited | Financial services | 2021 |
| Fastrack Site Investigations Limited | Professional & scientific | 2011 |
| FC Cleaning Services Limited | Administrative & support | 2014 |
| Febmed Ltd | Health & social care | 2019 |
| Feel Good Wood Limited | Manufacturing | 2014 |
| Fellowship Afloat Charitable Trust | Education | 1996 |
| Fenglaze Limited | Construction | 2018 |
| Ferrers Dental Technology Ltd | Health & social care | 2014 |
| Fete and Feast Limited | Hospitality | 2025 |
| Fever Accessories Limited | Wholesale & retail | 2010 |
| FHZ Properties Limited | Real estate | 2025 |
| Fibrosan U.K. Limited | Wholesale & retail | 2007 |
| Fibrous Supplies Company Ltd | Wholesale & retail | 2026 |
| Field View Wethersfield Management Company Ltd | Households | 2020 |
| Fifteen Waterloo Place Ltd | Real estate | 2023 |
| Finches Fine Carpentry Ltd | Manufacturing | 2025 |
| Findon Dental Care Limited | Health & social care | 2006 |
| Fine Art Valuation Limited | Arts & recreation | 2012 |
| Finsbury Park Place Residents Management Company Limited | Households | 2012 |
| Fipl Commercial Limited | Transport & logistics | 2026 |
| Fipl Holdco Limited | Professional & scientific | 2026 |
| Fipl Limited | Transport & logistics | 2004 |
| Fire Delay Ltd | Public administration | 2025 |
| Fire Services Fund-Raising Shop CIC | Wholesale & retail | 2009 |
| Firenze Interiors Limited | Manufacturing | 2025 |
| Firesurv Group Ltd | Professional & scientific | 2026 |
| First Prospect Limited | Administrative & support | 2006 |
| First Service Baker Tennis Community CIC | Education | 2007 |
| First Steps Montessori Limited | Education | 2001 |
| First TRY Sports CIC | Education | 2025 |
| Fish and Bits Aquatics Limited | Wholesale & retail | 2020 |
| Fitch Family Holdings Ltd | Other services | 2019 |
| Fitchett & Woollacott Limited | Manufacturing | 2010 |
| Fitness Central Ltd | Wholesale & retail | 2023 |
| FIX ALL Home Improvements Limited | Construction | 2016 |
| Flak Limited | Information & communication | 2009 |
| Flamingo Estates Limited | Real estate | 2020 |
| Flexiteek International Limited | Manufacturing | 1975 |
| Floi Ltd | Administrative & support | 2024 |
| Floshine Window Cleaning and Maintenance Ltd | Construction | 2024 |
| Flow Build Solutions Limited | Construction | 2014 |
| Flowers by Sarah ANN Ltd | Wholesale & retail | 2018 |
| Flowmaster Heating Ltd | Construction | 2025 |
| Flue Doctors Limited | Construction | 2003 |
| Fluffys Cafe Ltd | Hospitality | 2025 |
| FM Group Holdings Ltd | Financial services | 2026 |
| Focus on News Limited | Information & communication | 2017 |
| Foodies Fuel Limited | Extraterritorial | 2025 |
| FOR Pakking Limited | Administrative & support | 2016 |
| Fords Joinery Limited | Construction | 2014 |
| Form Architecture Ltd | Professional & scientific | 2002 |
| Forrester Park Swimming Pool Limited | Arts & recreation | 2005 |
| Forward Wealth Ltd | Health & social care | 2025 |
| Forwarding Property Limited | Real estate | 2022 |
| Fossil to Alternative Engineering Ltd | Other services | 2024 |
| Fountainfotos Limited | Information & communication | 2018 |
| Fourways Trading (Essex) Ltd | Construction | 2006 |
| Foxall Munro Limited | Professional & scientific | 2026 |
| Foxwood Ceramics Limited | Wholesale & retail | 1999 |
| FPA Engineering Limited | Professional & scientific | 2017 |
| Frame & Build Ltd | Construction | 2023 |
| Frangipani SUP Limited | Arts & recreation | 2013 |
| Frankie Dees Pizza Ltd | Hospitality | 2025 |
| Frederick Charles Wealth Management Ltd | Financial services | 2017 |
| Freebournes Court Management (Witham) Limited | Other services | 1986 |
| Freedom Logistics Ltd | Transport & logistics | 2022 |
| Freedom Logistics U.K. Limited | Transport & logistics | 2007 |
| Freehold Notices Ltd | Other services | 2020 |
| Freehold Sale Ltd | Real estate | 2016 |
| Freight Consultants Limited | Professional & scientific | 2006 |
| Freight Filter Ltd | Transport & logistics | 2013 |
| French Circle Ltd | Wholesale & retail | 2026 |
| Front ROW Coaching Limited | Administrative & support | 2023 |
| Frontier Marble and Granite (UK) Limited | Manufacturing | 2006 |
| FRY Sports Holdings Ltd | Education | 2022 |
| FSF Partnership Limited | Construction | 2025 |
| FSH Properties Limited | Real estate | 2016 |