| Equine Advisory Limited | Agriculture & fishing | 2019 |
| Equine Earz Ltd | Manufacturing | 2023 |
| Equine World Limited | Wholesale & retail | 2018 |
| Equisave Horse Ambulances Limited | Other services | 2000 |
| Eric Tennant Butcher Limited | Wholesale & retail | 2014 |
| Erstellen Studio Ltd | Professional & scientific | 2017 |
| ES Fisher Events Limited | Hospitality | 2022 |
| Esha Electrical Ltd | Construction | 2008 |
| Especially Office Ltd | Professional & scientific | 1999 |
| Essex & Suffolk Equine Transport Ltd | Transport & logistics | 2026 |
| Essex Shops Limited | Real estate | 1995 |
| ETN Invest Ltd | Real estate | 2019 |
| ETZ Financial Services Limited | Financial services | 2020 |
| ETZ Freelancers Limited | Administrative & support | 2020 |
| ETZ IP Ltd | Administrative & support | 2019 |
| ETZ PLC | Administrative & support | 2020 |
| ETZ Technologies Limited | Information & communication | 2000 |
| EV Ltd | Extraterritorial | 2009 |
| EVA Hospitality Ltd | Hospitality | 2024 |
| Evas Logistic Ltd | Transport & logistics | 2019 |
| Event Pubs Ltd | Hospitality | 2022 |
| Events by Rebecca Ltd | Administrative & support | 2019 |
| Evergreen Properties (London) Limited | Extraterritorial | 1988 |
| Everhealth Care Ltd | Construction | 2024 |
| Eversheds Wealth MAP Ltd | Financial services | 2024 |
| Evolue Ltd | Professional & scientific | 2022 |
| Evolve Supply Chain Limited | Transport & logistics | 2025 |
| Evolved Construction Ltd | Construction | 2025 |
| Evouchers Ltd | Information & communication | 2022 |
| Ewag Everyday Limited | Wholesale & retail | 2019 |
| EWH Consultancy Services Limited | Professional & scientific | 2022 |
| EX Catering Ltd | Hospitality | 2018 |
| EX Ltd | Extraterritorial | 2020 |
| Exact Property Ltd | Real estate | 2016 |
| Exact Sourcing Ltd | Administrative & support | 2011 |
| Exact Space Ltd | Real estate | 2025 |
| Excel Lasers Limited | Manufacturing | 2012 |
| Exciton Labs Ltd | Professional & scientific | 2015 |
| Exegrain Limited | Extraterritorial | 1969 |
| Exhale by Elegance Limited | Other services | 2025 |
| Exit Rooms Limited | Arts & recreation | 2019 |
| Exle Limited | Construction | 2020 |
| Express CAB Ltd | Transport & logistics | 2025 |
| Express Services Newmarket Ltd | Transport & logistics | 2025 |
| Ezdilarden Limited | Wholesale & retail | 2023 |
| F J Lucas & SON Limited | Manufacturing | 2006 |
| F R S Roofing (Cambs) Ltd | Construction | 2014 |
| F. Whaler Limited | Extraterritorial | 1982 |
| F.E Plumbing & Heating Limited | Construction | 2017 |
| FAB4LIFE Limited | Health & social care | 2018 |
| Fabled Events Ltd | Administrative & support | 2025 |
| Fairhaven Stone Ltd | Construction | 1998 |
| Family Home Services Group Ltd | Construction | 2026 |
| Faradayvolt Ltd | Professional & scientific | 2020 |
| Farloway Ltd | Administrative & support | 2025 |
| Farrant Holdings Limited | Construction | 1986 |
| Fashion Wholesale It-Uk Ltd | Wholesale & retail | 2025 |
| Fast TEC Limited | Wholesale & retail | 2021 |
| Fastec Engineering Services Ltd. | Manufacturing | 2000 |
| Fastec Racing Limited | Wholesale & retail | 2012 |
| Fastform Services Ltd | Manufacturing | 2012 |
| FC Continental Limited | Other services | 2019 |
| Feedex International Limited | Extraterritorial | 1973 |
| Fenway Television Limited | Wholesale & retail | 1971 |
| Ferme Verte Ltd | Agriculture & fishing | 2024 |
| Fernedge Limited | Real estate | 1970 |
| FH Brands Ltd | Wholesale & retail | 2023 |
| FHT Investments Limited | Financial services | 2023 |
| Fibrenex Communications (Cambs) Limited | Information & communication | 2021 |
| Fieldfare Consulting Ltd | Professional & scientific | 2022 |
| Finagility Ltd | Professional & scientific | 2019 |
| Finance Transformation Consulting Ltd | Information & communication | 2011 |
| Financial Wellbeing Solutions Ltd | Financial services | 2018 |
| Findem Limited | Administrative & support | 2020 |
| Fingerprint Digital Limited | Manufacturing | 2011 |
| Finlaggan Bloodstock Limited | Agriculture & fishing | 2020 |
| Finnystar Ltd | Financial services | 2023 |
| Finsbury Place Management Company Limited | Households | 2021 |
| Fiona Mcgregor Limited | Information & communication | 2018 |
| Fire Consultancy Limited | Public administration | 2016 |
| Firedaemon Technologies Limited | Administrative & support | 2006 |
| Firmament Properties Limited | Real estate | 1995 |
| First Step Trading (Commercial) Ltd | Construction | 2015 |
| First Step Trading Ltd | Wholesale & retail | 2014 |
| Fit Again Sports Therapy Limited | Health & social care | 2016 |
| Fitsall Roofing (UK) Ltd | Construction | 2013 |
| Fittocks Stud Limited | Agriculture & fishing | 1980 |
| FKM Enterprises Ltd | Wholesale & retail | 2005 |
| Flame Lily Properties Ltd | Real estate | 2022 |
| Flintgrove Capital Ltd | Real estate | 2023 |
| FLO Kelly Ltd | Administrative & support | 2017 |
| FLO Leisure Ltd | Hospitality | 2018 |
| Flourish Training and Coaching Ltd | Education | 2016 |
| FLY Auto Sales Ltd | Wholesale & retail | 2026 |
| Flying-Fx Limited | Arts & recreation | 2004 |
| Food Market 8A Limited | Hospitality | 2017 |
| Footprint Consultancy Ltd | Professional & scientific | 2024 |
| Footwork Reflexology Ltd | Health & social care | 2023 |
| FOR Sale Visit Www.Buythiscompanyname.Co.Uk Ltd | Extraterritorial | 2025 |
| FOR YOU Real Estate Limited | Real estate | 2025 |