| Flawless Developments Ltd | Administrative & support | 2021 |
| Flawless Installations Ltd | Construction | 2026 |
| Fleet Autoservices Limited | Wholesale & retail | 2020 |
| Fleet Business Security (Midlands) Limited | Extraterritorial | 2020 |
| Fleet Development Ltd | Wholesale & retail | 2014 |
| Fleet Optimise Ltd | Information & communication | 2004 |
| Flexgate Limited | Wholesale & retail | 2024 |
| Flick Electrical Wholesale (Birmingham) Limited | Wholesale & retail | 2022 |
| Flick Electrical Wholesale (Halesowen) Limited | Wholesale & retail | 2015 |
| Flick Electrical Wholesale (Marston Green) Limited | Wholesale & retail | 2025 |
| Flick Electrical Wholesale (Solihull) Limited | Wholesale & retail | 2019 |
| Flick Electrical Wholesale (Tamworth) Limited | Wholesale & retail | 2020 |
| Flick Electrical Wholesale (Telford) Limited | Wholesale & retail | 2025 |
| Flick Electrical Wholesale Limited | Wholesale & retail | 2015 |
| Flick Energy Solutions Limited | Wholesale & retail | 2016 |
| Flick Lighting Limited | Manufacturing | 2014 |
| Fliqer Limited | Education | 2023 |
| Floeva Limited | Hospitality | 2025 |
| Flooble Limited | Information & communication | 2013 |
| Floor 2000 Limited | Administrative & support | 1998 |
| Floor to Door Online Limited | Wholesale & retail | 2019 |
| Flooring Vault Ltd | Construction | 2019 |
| Floristry by Rose of Sharon Ltd | Other services | 2025 |
| Flourish Business Club Ltd | Administrative & support | 2022 |
| Flourish Business Solutions Limited | Administrative & support | 2026 |
| Flow Control Engineering Solutions Limited | Administrative & support | 2011 |
| Flow Solutions Plumbing & Heating Services Limited | Manufacturing | 2025 |
| Flower Worx Ltd | Wholesale & retail | 2024 |
| Flowers by Design Limited | Extraterritorial | 1994 |
| Flowtec Global Ltd | Professional & scientific | 2023 |
| Flowtec Solutions Ltd | Administrative & support | 2012 |
| Fluid Media Ltd. | Wholesale & retail | 2000 |
| Fluid Media Studio Ltd | Wholesale & retail | 2025 |
| Fluidyn Limited | Administrative & support | 2009 |
| Flying Buffalo Ltd | Wholesale & retail | 2021 |
| Flying High Nursery School Limited | Education | 2017 |
| Flynn Solutions Limited | Construction | 2015 |
| FM HSE Procurement Consulting Ltd | Professional & scientific | 2026 |
| FMG-18 Limited | Hospitality | 2021 |
| FMH Financial Services Limited | Financial services | 2012 |
| FMR Property Management Limited | Real estate | 2024 |
| Focal Design Studio Limited | Manufacturing | 2024 |
| Focus Electrical Contracts Ltd | Construction | 2025 |
| Focused Neurodiversity Limited | Education | 2016 |
| Folding Doors Limited | Professional & scientific | 2011 |
| Folklore Coffee and Bagels Ltd | Hospitality | 2024 |
| Footwise Limited | Health & social care | 2011 |
| FOR Good Factory Ltd | Professional & scientific | 2023 |
| FOR Sale (UK) Ltd | Wholesale & retail | 2014 |
| Foray Wintec Holdings B.V. | | 2004 |
| Forbesfx Ltd | Information & communication | 2022 |
| Forbez Limited | Financial services | 2024 |
| Ford Ennals Funeral Services Limited | Extraterritorial | 1977 |
| Forde Investments Ltd | Real estate | 2025 |
| Forden Limited | Wholesale & retail | 2019 |
| Forensic Psychology Practice Limited | Health & social care | 1995 |
| Forest Green Property Group Limited | Real estate | 2020 |
| Forest Schools Birmingham (2022) Ltd | Education | 2022 |
| Forest Schools Birmingham CIC | Education | 2010 |
| Forest Shipping (UK) Ltd | Transport & logistics | 2021 |
| Forethought Limited | Extraterritorial | 1957 |
| Forever Communications Limited | Information & communication | 2009 |
| Forever Daya Limited | Administrative & support | 2025 |
| Forever Systems Limited | Information & communication | 2011 |
| Forever Telecom Limited | Information & communication | 2011 |
| Forever Young IV Ltd | Health & social care | 2026 |
| Forge Construction Services Limited | Construction | 2020 |
| Forklift Express Ltd | Administrative & support | 2020 |
| Form 1 Capital Limited | Manufacturing | 2017 |
| Formosa (Holdings) Limited | Financial services | 2020 |
| Formula Motion Ltd | Manufacturing | 2012 |
| Forrest House Management Company Limited | Households | 2004 |
| Forster Smith Limited | Professional & scientific | 2011 |
| Forsythia Properties Ltd | Real estate | 2024 |
| Fort Estates Limited | Administrative & support | 2007 |
| Forte Haven Synergy Limited | Real estate | 2026 |
| Forth Engineering Limited | Manufacturing | 1960 |
| Fortify Vita Ltd | Administrative & support | 2022 |
| Fortress Support Limited | Health & social care | 2026 |
| Fostronix Ltd | Manufacturing | 2025 |
| Fotas DH Limited | Financial services | 2026 |
| Fotas Limited | Extraterritorial | 2004 |
| Fotas SC Limited | Financial services | 2025 |
| Foundry Gym Warrington Limited | Arts & recreation | 2025 |
| Four Looks Limited | Other services | 2024 |
| Four Oaks Builders Limited | Construction | 2017 |
| Four Oaks Commercial Property Group Limited | Real estate | 2021 |
| Four Oaks Conservation Limited | Construction | 2010 |
| Four Oaks Contracts Ltd | Information & communication | 2021 |
| Four Oaks Electrical Services Holdings Limited | Financial services | 2026 |
| Four Oaks Electrical Services Limited | Construction | 2005 |
| Four Oaks Engineering Services Limited | Administrative & support | 2006 |
| Four Oaks Estate Limited | Households | 1927 |
| Four Oaks Estate Security Services Ltd | Administrative & support | 2023 |
| Four Oaks Finance Limited | Financial services | 2024 |
| Four Oaks Food Co Limited | Hospitality | 2020 |
| Four Oaks Hair Limited | Other services | 2026 |
| Four Oaks Learning Trust for Excellence | Education | 2013 |
| Four Oaks Living Limited | Real estate | 2021 |
| Four Oaks Physio Ltd | Health & social care | 2020 |