| Fractional Secretaries Limited | Professional & scientific | 2006 |
| Fractional Trustees Limited | Professional & scientific | 2005 |
| Fracture Ltd | Arts & recreation | 2024 |
| Frafra Baskets Ltd | Wholesale & retail | 2018 |
| Fram Healthcare Ltd | Health & social care | 2024 |
| Frame Interiors Limited | Professional & scientific | 2022 |
| Frame IT Photobooth Ltd | Professional & scientific | 2025 |
| Framed Splendor Ltd | Manufacturing | 2026 |
| Frameflair Limited | Financial services | 2003 |
| Frames Beaumont Leys Ltd | Health & social care | 2023 |
| Frames Bulwell Ltd | Health & social care | 2022 |
| Frames Corby Ltd | Health & social care | 2022 |
| Frames Group Ltd | Health & social care | 2022 |
| Frames Harlesden Ltd | Health & social care | 2024 |
| Frames Leicester City Ltd | Health & social care | 2024 |
| Frames Loughborough Ltd | Health & social care | 2022 |
| Frames Ratcliffe on Trent Ltd | Health & social care | 2022 |
| Frames Stratford Ltd | Health & social care | 2022 |
| Framory Prints Ltd | Manufacturing | 2026 |
| Frampton Consultancy Ltd | Other services | 2018 |
| Fran Cousans Consulting Ltd | Professional & scientific | 2017 |
| France Removals Limited | Transport & logistics | 2026 |
| Frances Taylor Designs Ltd | Professional & scientific | 2022 |
| Franchise Consultings International Limited | Professional & scientific | 2026 |
| Franchise INT Ltd | Professional & scientific | 2006 |
| Francis & Robertson Limited | Extraterritorial | 1962 |
| Francis Locum Services Limited | Health & social care | 2007 |
| Francisco Xavier Limited | Wholesale & retail | 2011 |
| Francois James Ltd | Extraterritorial | 2022 |
| Frank Collins Advisory Limited | Professional & scientific | 2014 |
| Frank Employment Law Advice Ltd | Professional & scientific | 2018 |
| Frank Films Ltd | Information & communication | 2022 |
| Frank Grooming Salon Ltd | Transport & logistics | 2023 |
| Frank LEE & SON Limited | Wholesale & retail | 1981 |
| Frank Melrose Joinery Ltd | Construction | 2026 |
| Frank Ventures Ltd | Other services | 2020 |
| Frank Woods Collection Ltd | Wholesale & retail | 2025 |
| Frankanora Ltd | Wholesale & retail | 2025 |
| Frankham Bros Holdings Limited | Professional & scientific | 2017 |
| Frankham Bros Limited | Manufacturing | 1962 |
| Frankham Bros Trade Holdings Limited | Financial services | 2020 |
| Frankie & Co (UK) Limited | Hospitality | 2019 |
| Franklyn Yates Engineering Limited | Administrative & support | 1999 |
| Frapidi Care Services Limited | Administrative & support | 2022 |
| Frasam Ltd | Information & communication | 2025 |
| Fraser James Blinds Limited | Wholesale & retail | 2010 |
| Fraser James Developments Ltd | Real estate | 2022 |
| Fraser Noble School Ltd | Education | 2026 |
| Fraser Properties Leicester Ltd | Real estate | 2016 |
| Fraser Stretton Developments Limited | Construction | 2025 |
| Fraser Stretton Limited | Households | 2019 |
| Fraser Stretton Maintenance Limited | Construction | 2019 |
| Fraser Stretton Property Group Limited | Financial services | 2019 |
| Fraser Urquhart Ltd | Professional & scientific | 2021 |
| Frawla Limited | Real estate | 2019 |
| Fraya House Ltd | Wholesale & retail | 2024 |
| Frays Dental Centre Limited | Health & social care | 2012 |
| Fredabs Care Services Ltd | Health & social care | 2023 |
| Fredabs Facilities and Construction Management Services Ltd | Construction | 2023 |
| Fredabs Limited | Wholesale & retail | 2020 |
| Free Cannon Trading Ltd | Hospitality | 2025 |
| Free in Recovery CIC | Education | 2023 |
| Freebird (Textiles) Limited | Manufacturing | 1986 |
| Freedia Building Suppliers Ltd | Wholesale & retail | 2021 |
| Freedom ERA Ltd | Information & communication | 2024 |
| Freedom From Sugar Addiction Ltd | Health & social care | 2021 |
| Freedom Hygiene Limited | Wholesale & retail | 2016 |
| Freedom in Property Ltd | Hospitality | 2022 |
| Freedom Technologies (UK) Limited | Wholesale & retail | 2008 |
| Freedom the Dialysis Holiday Specialist Limited | Administrative & support | 1986 |
| Freeflight Web Solutions Limited | Information & communication | 2021 |
| Freefrom Shoppe UK Ltd | Wholesale & retail | 2025 |
| Freelance Marketing Services UK Limited | Professional & scientific | 2016 |
| Freeline Creative Ltd | Information & communication | 2015 |
| Freeman Auto Repairs Ltd | Wholesale & retail | 2024 |
| Freeman Auto Tyres Ltd | Manufacturing | 2025 |
| Freeman Autos Ltd | Wholesale & retail | 2019 |
| Freeman Energy Limited | Professional & scientific | 2003 |
| Freeman Enterprises Ltd | Professional & scientific | 2025 |
| Freemasons' Hall (Leicester) Limited | Other services | 2002 |
| Freerbutler Limited | Information & communication | 2013 |
| Freeroam Abroad Ltd | Administrative & support | 2024 |
| Freeva | Health & social care | 2006 |
| Freight Nova Limited | Wholesale & retail | 2025 |
| Freight Point Transport & Logistics Ltd | Transport & logistics | 2025 |
| Freightnordic Holdings Limited | Financial services | 2026 |
| Freightnordic Logistics Ltd | Transport & logistics | 2019 |
| Freightpod Ltd | Transport & logistics | 2025 |
| Freightport Holdings Limited | Financial services | 2022 |
| Freightport Logistics Ltd | Transport & logistics | 2013 |
| Freiz Limited | Transport & logistics | 2025 |
| Frelca Engineering Limited | Professional & scientific | 2012 |
| French Bleu Limited | Other services | 1994 |
| Frenchgate SUB Ltd | Hospitality | 2023 |
| Frenchie Frenchie Ltd | Wholesale & retail | 2019 |
| Fresco Campo Ltd | Wholesale & retail | 2026 |
| Fresco Fresh Limited | Hospitality | 2018 |
| Fresh & Crunchy Ltd | Hospitality | 2011 |
| Fresh Agro Limited | Wholesale & retail | 2021 |
| Fresh and Green Ltd | Professional & scientific | 2005 |