| Exchange Garage Autos Limited | Wholesale & retail | 2006 |
| Exclusive Media Entertainment Ltd | Other services | 2019 |
| Experienced Project Management Limited | Construction | 2023 |
| Expert Accounting Solutions Ltd | Professional & scientific | 2025 |
| Express Radiators (East Anglia) Limited | Extraterritorial | 1998 |
| F & J Property Investments Ltd | Construction | 2020 |
| F Goodale & SON Limited | Agriculture & fishing | 2006 |
| F.& W.Taylor(Wisbech Contractors)Limited | Real estate | 1972 |
| F.Harold Rockcliffe Limited | Agriculture & fishing | 1961 |
| F.W.Deptford (Hungate) Limited | Agriculture & fishing | 1956 |
| F2 Motorcycles Ltd | Wholesale & retail | 2004 |
| Fabrica Investments Limited | Hospitality | 2009 |
| Face Analytics Ltd. | Information & communication | 2020 |
| Fairview Nursery Limited | Agriculture & fishing | 2017 |
| Falken Logistics Ltd | Transport & logistics | 2021 |
| FAN Trans Ltd | Transport & logistics | 2026 |
| FAR Horizons Design Limited | Professional & scientific | 2022 |
| FAR Leach Farm Limited | Real estate | 2025 |
| FAR Pulse UK Limited | Wholesale & retail | 2019 |
| FARM2FORK Technical Consultancy Ltd | Professional & scientific | 2011 |
| Farmhouse Foods (Fenland) Limited | Wholesale & retail | 1956 |
| Farthingales Legal Services Limited | Professional & scientific | 2024 |
| Fast Conveyors Online Ltd | Wholesale & retail | 2019 |
| Faster Lente Llamas Ltd | Agriculture & fishing | 2016 |
| FD Mechanics Ltd | Wholesale & retail | 2009 |
| Fearon & SON Ltd | Real estate | 2019 |
| Feelcleaner Ltd. | Administrative & support | 2019 |
| Feishdek UK Ltd | Wholesale & retail | 2021 |
| FEN Ditching Company Limited | Construction | 1996 |
| FEN Trailer Services Limited | Wholesale & retail | 2018 |
| Fenberry Developments Limited | Construction | 2015 |
| Fenbuild Limited | Construction | 2003 |
| Fencroft Advisory Ltd | Other services | 2024 |
| Fenden Capital Limited | Professional & scientific | 2019 |
| Fenix Engineering Ltd | Manufacturing | 2008 |
| Fenland Accountants Limited | Professional & scientific | 2026 |
| Fenland Choppers Limited | Manufacturing | 2010 |
| Fenland Cleaning Services Limited | Administrative & support | 2007 |
| Fenland Construction Limited | Construction | 2020 |
| Fenland Equestrian Centre Ltd | Extraterritorial | 2012 |
| Fenland Fire Appliance LLP | | 2011 |
| Fenland Handling Limited | Administrative & support | 2022 |
| Fenland Handling Services Limited | Administrative & support | 2017 |
| Fenland Haulage Limited | Transport & logistics | 2013 |
| Fenland Leisure Products Limited | Manufacturing | 1998 |
| Fenland Property Maintenance (Cambs) Limited | Construction | 2025 |
| Fenland Recruitment Limited | Extraterritorial | 2010 |
| Fenland Residential Limited | Real estate | 2020 |
| Fenland Storage Holdings Limited | Financial services | 2023 |
| Fenland Storage Limited | Transport & logistics | 2023 |
| Fenland Topfruits Ltd | Agriculture & fishing | 2008 |
| Fenlandtcg Limited | Wholesale & retail | 2025 |
| Fenmarc Holdings Limited | Professional & scientific | 2015 |
| Fenmarc Produce Limited | Manufacturing | 1990 |
| Fenregis Trophies Limited | Arts & recreation | 2005 |
| Fenrock Limited | Arts & recreation | 2016 |
| Fensecure Limited | Administrative & support | 2024 |
| Fenshire Construction Ltd | Construction | 2023 |
| Fenside Design Limited | Professional & scientific | 2011 |
| Fensome and Payne Limited | Extraterritorial | 2015 |
| Fenspirits Larder Limited | Wholesale & retail | 2019 |
| Fenstar IT Limited | Information & communication | 2017 |
| Fenton Properties Developments Ltd | Real estate | 2024 |
| Ferad-Silvia Limited | Hospitality | 2015 |
| Fern Fabrications Limited | Manufacturing | 2023 |
| Fern Homes Ltd | Construction | 2010 |
| FFC Limited | Wholesale & retail | 2024 |
| FHS Holdings Limited | Financial services | 2020 |
| Field Views Lane (NO 1) Management Company Ltd | Households | 2026 |
| Find a REG Ltd | Wholesale & retail | 2024 |
| Finding Your Haven Limited | Education | 2026 |
| Fire Doors Solutions 60 Limited | Public administration | 2025 |
| Fireflow Ltd | Arts & recreation | 2012 |
| First Acacia Limited | Extraterritorial | 2017 |
| First Defence Contracts Ltd | Wholesale & retail | 2020 |
| First Impact Pictures Limited | Information & communication | 2002 |
| Fishlock Stables & Groundworks Limited | Construction | 2013 |
| Fitzpatrick Property Ltd | Real estate | 2018 |
| Five Bells Leisure Limited | Hospitality | 2024 |
| Fives Star Ltd | Wholesale & retail | 2023 |
| FIX Prime Ltd | Wholesale & retail | 2025 |
| Fizz and Bubbles Limited | Hospitality | 2024 |
| FK Motors Limited | Wholesale & retail | 2022 |
| Flash Roofing UK Ltd | Construction | 2026 |
| Flight-Assist Limited | Transport & logistics | 2006 |
| Flittermere Developments Limited | Construction | 2019 |
| Florasentiment XV Holdings Ltd | Financial services | 2026 |
| Floteck Limited | Construction | 2018 |
| Flowa Gold Care Limited | Health & social care | 2025 |
| Floyd Contracting Ltd | Agriculture & fishing | 2021 |
| FLT Universe Ltd | Transport & logistics | 2023 |
| Fluent Shore Limited | Wholesale & retail | 2026 |
| Fmpi Limited | Real estate | 2024 |
| FMS Design & Engineering Ltd | Manufacturing | 2009 |
| FNL Pallet Services Ltd | Administrative & support | 2020 |
| Folio Web Design Ltd | Wholesale & retail | 2007 |
| Folkham Developments Limited | Construction | 2025 |
| Folkham Leisure Ltd | Wholesale & retail | 2023 |
| Food Plus Wisbech Ltd | Wholesale & retail | 2025 |
| Football Banter Ltd | Wholesale & retail | 2026 |