| Fabfinds Limited | Wholesale & retail | 2017 |
| Fabi Cars Ltd | Wholesale & retail | 2025 |
| Fabric and Clothing Ltd | Wholesale & retail | 2026 |
| Fabric Fashion Ltd | Wholesale & retail | 2019 |
| Fabric Lounge Ltd | Wholesale & retail | 2017 |
| Fabric Maintenance Solutions Ltd. | Construction | 2022 |
| Fabric Styles Ltd | Wholesale & retail | 2016 |
| Fabrica Drapes Ltd | Wholesale & retail | 2024 |
| Fabricated Access Covers Trade Association | Administrative & support | 2025 |
| Fabrications and Construction Limited | Manufacturing | 2015 |
| Fabricking Ltd | Wholesale & retail | 2019 |
| Fabricshapeworks Limited | Manufacturing | 2025 |
| Fabricwise Ltd | Wholesale & retail | 2012 |
| Fabulous Fashion (UK) Ltd | Manufacturing | 2024 |
| Fabulous Looks UK Ltd | Wholesale & retail | 2021 |
| FABWORKS360D Ltd | Professional & scientific | 2025 |
| Face Glaze Limited | Wholesale & retail | 2024 |
| Faceless Growth HQ Ltd | Professional & scientific | 2025 |
| Faceless Trekker Ltd | Wholesale & retail | 2026 |
| Facial Perfection Ltd | Health & social care | 2021 |
| Facial Toning Solutions Limited | Other services | 2003 |
| Facilities Management Control Limited | Professional & scientific | 2010 |
| Facilities Pro Services Ltd | Transport & logistics | 2022 |
| Factor Five Ltd | Manufacturing | 2009 |
| FACTORY79 Ltd | Wholesale & retail | 2025 |
| FAD I.T. Solutions Limited | Wholesale & retail | 1998 |
| Fadah Ltd | Wholesale & retail | 2023 |
| Fade Barber Smart Ltd | Other services | 2025 |
| Fade Master Glenfield Ltd | Other services | 2023 |
| Fades Leicester Limited | Other services | 2024 |
| Fadiyas Limited | Professional & scientific | 2018 |
| Fadiyas Properties Ltd | Real estate | 2021 |
| FAE Studios Ltd | Education | 2022 |
| Fagence Browne Limited | Construction | 2012 |
| Fahus Limited | Wholesale & retail | 2024 |
| FAI Limited | Real estate | 2025 |
| Faicon Advisory & Support Services Ltd | Professional & scientific | 2025 |
| Failsafe Intelligence Limited | Information & communication | 2025 |
| Fainz Holdings Limited | Real estate | 2026 |
| Fainz Technology Limited | Information & communication | 2024 |
| Fair Deal Shop Limited | Wholesale & retail | 2017 |
| Fair Faress Ltd | Transport & logistics | 2019 |
| Fair Wind Financials Limited | Financial services | 2024 |
| Fairbound Ltd | Information & communication | 2020 |
| Fairbrick Holdings Ltd | Financial services | 2024 |
| Fairbrick Property Solutions Ltd | Real estate | 2024 |
| Fairbrother Holdings Limited | Financial services | 2000 |
| Fairfax Store (Leicester) Ltd | Wholesale & retail | 2022 |
| Fairfax Tax and Accounts Limited | Professional & scientific | 2013 |
| Fairfield & Shore Ltd | Wholesale & retail | 2014 |
| Fairford Accountants Limited | Professional & scientific | 2020 |
| Fairgate Property Company Limited | Real estate | 1986 |
| Fairplay Accounting & Taxation Ltd | Professional & scientific | 2020 |
| Fairplaysbetting Ltd | Arts & recreation | 2024 |
| Fairsk.In International Ltd | Wholesale & retail | 2024 |
| Fairstone Properties Ltd | Real estate | 2022 |
| Fairtree Limited | Real estate | 2017 |
| Fairuzee Company Limited | Wholesale & retail | 2017 |
| Fairview Finishing Ltd | Manufacturing | 2017 |
| Fairway Albian Ltd | Wholesale & retail | 2025 |
| Fairway Assured Limited | Real estate | 1991 |
| Fairway Contractors Ltd | Construction | 2026 |
| Fairway Properties Birmingham Limited | Real estate | 2014 |
| Fairway Wealth Management Limited | Professional & scientific | 2024 |
| Fairways & Wakerley Limited | Wholesale & retail | 2023 |
| Fairy Wings and ME Limited | Administrative & support | 2012 |
| Fairycake Shop Leicester Ltd | Manufacturing | 2023 |
| Fairycare Ltd | Wholesale & retail | 2023 |
| Fairytale Games Limited | Information & communication | 2023 |
| Faisa Boutique Ltd | Wholesale & retail | 2025 |
| Faisdam Services Limited | Health & social care | 2023 |
| Fait Avec Amour Ltd | Wholesale & retail | 2025 |
| Faith Dube Care Services Limited | Other services | 2016 |
| Faith General Trading Ltd | Wholesale & retail | 2025 |
| Faiz Mobile Accessories Ltd | Wholesale & retail | 2019 |
| Faiz Properties Leics Ltd | Real estate | 2021 |
| Faiz Property Ltd | Real estate | 2025 |
| Faiza Sultan Khan Limited | Information & communication | 2022 |
| Fajr Al-Binaa Al-Arabi General Contracting Ltd | Construction | 2025 |
| Fajr Global Relief Ltd | Education | 2024 |
| Fajr Group Limited | Financial services | 2024 |
| Fakhri Ltd | Wholesale & retail | 2024 |
| Fako Global Services Limited | Real estate | 2019 |
| Falafel Shawarma Land Ltd | Hospitality | 2021 |
| Falafel Waffle Ltd | Hospitality | 2020 |
| Falco Subbuteo Ltd | Arts & recreation | 2015 |
| Falcon Builders Ltd | Construction | 2013 |
| Falcon Capital Limited | Real estate | 2025 |
| Falcon Care Agency Ltd | Health & social care | 2019 |
| Falcon Wholesale Ltd | Manufacturing | 2020 |
| Falcony Care Services Ltd | Health & social care | 2020 |
| Falesia Homes Ltd | Real estate | 2021 |
| Fall Line Events Limited | Arts & recreation | 2012 |
| Fall Line Holdings Limited | Financial services | 2024 |
| Fallow Homes Ltd | Construction | 2010 |
| Falmouth Management (Leicester) Limited | Households | 1983 |
| FAM Art Ltd | Other services | 2017 |
| Famassess Limited | Health & social care | 2025 |
| Fame Commercials Limited | Wholesale & retail | 2013 |
| Fame Fashions (UK) Ltd | Wholesale & retail | 2014 |