| Fair Oak Consultancy Ltd | Professional & scientific | 2023 |
| Fairline Homes (London Contracting) Ltd | Construction | 2024 |
| Fairline Homes (London) Ltd | Construction | 2024 |
| Faith in Society Ltd | Professional & scientific | 2016 |
| Faithrise Ltd | Wholesale & retail | 2025 |
| Falcon Grinding 2017 Limited | Real estate | 2017 |
| Falcon Safety Products UK Limited | Wholesale & retail | 2007 |
| Family Ties Contact Centre Ltd | Health & social care | 2026 |
| FAN Sarwin Co., Ltd | Manufacturing | 2024 |
| Fantom Leisure Ltd | Arts & recreation | 2023 |
| Fantome Developments Limited | Construction | 2025 |
| Fanwu Ecommerce Limited | Manufacturing | 2025 |
| Fanxi INT Co., Ltd | Manufacturing | 2024 |
| Farfield System Solutions Ltd | Information & communication | 2021 |
| Fashionista Cardiff Ltd | Wholesale & retail | 2017 |
| Fast Genesis Limited | Professional & scientific | 2016 |
| Fastjp Ltd | Information & communication | 2015 |
| Fbhc Holdco Limited | Financial services | 2024 |
| FCI Contractors Ltd | Construction | 2018 |
| Fcomley Ltd | Health & social care | 2019 |
| Fcsmaintenance Ltd | Construction | 2025 |
| Feasibly Green Ltd | Professional & scientific | 2023 |
| Feather & FU Limited | Manufacturing | 2025 |
| Feel Warm Glazing Ltd | Wholesale & retail | 2016 |
| Feet First Farriers Ltd | Agriculture & fishing | 2008 |
| Felix Gbolabo Limited | Public administration | 2022 |
| Felix Property and Maintenance Ltd | Real estate | 2024 |
| Fellows Clarke Limited | Real estate | 2025 |
| Fengshan Capital Limited | Information & communication | 2024 |
| Fenny Racing Ltd | Arts & recreation | 2018 |
| Fenyx Ltd | Information & communication | 2026 |
| Fermented Oddity Studios Limited | Information & communication | 2024 |
| Ferrowell International Co., Limited | Manufacturing | 2023 |
| Festival Republic Group Limited | Arts & recreation | 2026 |
| Fever Media Ltd | Information & communication | 2020 |
| FEZ Technologies Limited | Information & communication | 2026 |
| FG Designsre Ltd | Information & communication | 2021 |
| Fgdnmipf Limited | Financial services | 2021 |
| FH Property Rental Ltd | Real estate | 2024 |
| Field Inns Limited | Real estate | 2000 |
| Field Optoelectronic Technology Co., Ltd | Manufacturing | 2022 |
| Fierce Face Limited | Administrative & support | 2015 |
| FIL Marco Trading Co., Limited | Wholesale & retail | 2024 |
| Filtermania Limited | Wholesale & retail | 2004 |
| Final Mile Home Delivery Ltd | Transport & logistics | 2024 |
| Finantek Ltd | Professional & scientific | 2023 |
| Find Your Healthy Life Ltd | Health & social care | 2026 |
| Fine Finish Carpentry Stafford Limited | Manufacturing | 2025 |
| Finlayson Holdings Limited | Real estate | 2017 |
| Fins & Feathers Limited | Hospitality | 2025 |
| Finteh Financial Services Limited | Financial services | 2021 |
| Fiona Moss Training Limited | Administrative & support | 2010 |
| Firefinch Properties Ltd | Real estate | 2020 |
| First Blue Aviation Limited | Transport & logistics | 2025 |
| First Blue Family Assessment Limited | Health & social care | 2023 |
| First Blue Inspired Limited | Health & social care | 2023 |
| First Blue Propco 4 Limited | Real estate | 2022 |
| First Blue Propco 5 Limited | Real estate | 2023 |
| First Blue Supported Accommodation Ltd | Health & social care | 2023 |
| First Blue Topco Limited | Financial services | 2025 |
| First Generation Holdings Ltd | Financial services | 2024 |
| First Gulf Trade Company Ltd | Wholesale & retail | 2025 |
| First Person Complex Care Limited | Health & social care | 2018 |
| First Person Resources Limited | Professional & scientific | 2005 |
| First Reunion Productions Limited | Information & communication | 2025 |
| FIS Refractory Limited | Manufacturing | 2019 |
| Fitzrae Estates Limited | Real estate | 2026 |
| FJ Tyres Ltd | Other services | 2021 |
| Flame Lily Services Ltd | Health & social care | 2025 |
| Flaming Kebab Ltd | Hospitality | 2026 |
| Flash Movers Ltd | Transport & logistics | 2026 |
| Flat and Rotary Co., Ltd | Manufacturing | 2016 |
| Flavour Project Limited | Hospitality | 2024 |
| Fleadh 2017 Ltd | Administrative & support | 2017 |
| Fleeman Clay LLP | | 2013 |
| Fleet Finesse Installations Ltd | Wholesale & retail | 2025 |
| Flewbak Limited | Wholesale & retail | 2016 |
| Flexly Holdings Co., Ltd | Wholesale & retail | 2022 |
| Flint Consultants Ltd | Information & communication | 2026 |
| FLO Remy Bars Ltd | Hospitality | 2018 |
| Floor 3 Events Ltd | Arts & recreation | 2016 |
| Flourish Estate Limited | Real estate | 2023 |
| Flow Air Conditioning Services Ltd | Manufacturing | 2015 |
| Flower Barns at YEW Tree Management Ltd | Households | 2019 |
| Flower Household Ltd | Wholesale & retail | 2023 |
| Flowers With Love Ltd | Arts & recreation | 2014 |
| Flux Electrical Solutions Limited | Construction | 2015 |
| Flux Property Limited | Real estate | 2024 |
| FLY Rock Ltd | Extraterritorial | 2023 |
| Flying Group Co., Ltd | Wholesale & retail | 2022 |
| Flytap Limited | Information & communication | 2021 |
| FM Properties (Staffs) Limited | Real estate | 2026 |
| FM4U Holdings Ltd | Financial services | 2019 |
| FM4U Ltd | Administrative & support | 2013 |
| FMR Direct Ltd | Real estate | 2009 |
| FMS Engineering Consultancy Limited | Professional & scientific | 2019 |
| Focus Design Studio Limited | Professional & scientific | 2020 |
| Focus Global Health Management Limited | Wholesale & retail | 2024 |
| Focusarchitects Limited | Professional & scientific | 2023 |
| Foinoe (UK) Ltd | Extraterritorial | 2015 |