| Frank Crossley & SON Limited | Wholesale & retail | 1959 |
| Fraser Marketing Consultancy Ltd | Professional & scientific | 2020 |
| Fravive Limited | Wholesale & retail | 2020 |
| Free Thought Ltd | Professional & scientific | 2021 |
| Freelance Transport Consultancy Ltd | Transport & logistics | 2015 |
| Freshcuisine Limited | Hospitality | 2013 |
| Frith Accountants Limited | Real estate | 2004 |
| From the Earth Ltd | Hospitality | 2025 |
| Frontline Designers Limited | Professional & scientific | 2019 |
| FS Blyth Ltd | Health & social care | 2025 |
| FTO Associates Limited | Professional & scientific | 2011 |
| Fulcrum Advisers Limited | Professional & scientific | 2016 |
| Fulkoley Limited | Hospitality | 2023 |
| Fuluji's Publishing Limited | Information & communication | 2003 |
| Furbold Developments Ltd | Construction | 2018 |
| Furbold Lettings Ltd | Real estate | 2026 |
| Futurama Developments Limited | Information & communication | 2020 |
| Future Edge Consulting Ltd | Information & communication | 2024 |
| Future Leaders Kids Ltd | Education | 2024 |
| Future Stock AI Limited | Professional & scientific | 2024 |
| FWP by RAE Limited | Manufacturing | 2017 |
| G & T Fuels Limited | Wholesale & retail | 2000 |
| G and N Property Investments Ltd | Real estate | 2022 |
| G Munt Limited | Financial services | 2011 |
| G T M S Services Limited | Professional & scientific | 2002 |
| G Wired Electrical Services Limited | Manufacturing | 2026 |
| G1 Installs Limited | Construction | 2014 |
| G2 Entertainment Limited | Information & communication | 2007 |
| G2 Rights Limited | Information & communication | 2010 |
| Gabriel Scott TV and Film Sound Limited | Information & communication | 2008 |
| Galaxy (Aviemore) Ltd | Hospitality | 2019 |
| Gallant Interiors Limited | Construction | 2021 |
| Gallica Place (Sissinghurst) Management Company Limited | Households | 2022 |
| Game Larder (Marlborough) Limited | Wholesale & retail | 2024 |
| Gamm Catering Ltd | Hospitality | 2021 |
| Gamma Solutions Limited | Professional & scientific | 1998 |
| Garden Buildings at Woodcote Green Limited | Wholesale & retail | 2009 |
| Garden Pride Estate Management Limited | Administrative & support | 2008 |
| Garden Pride Groundscare Limited | Administrative & support | 2008 |
| Garden Pride Horticulture Limited | Administrative & support | 2008 |
| Garden Pride Services Limited | Administrative & support | 2008 |
| Gardia Limited | Real estate | 1999 |
| Garfit Clowes Consultants Limited | Administrative & support | 1990 |
| Garol Management Company (Sutton) Limited | Households | 1975 |
| Garreson Homes Ltd | Real estate | 2021 |
| GAS Heating & Plumbing Ltd | Construction | 2018 |
| Gatton Associates Limited | Professional & scientific | 2010 |
| Gatton Creative Ltd | Professional & scientific | 2021 |
| Gatton Estates Ltd | Professional & scientific | 2020 |
| Gatton Films Ltd | Information & communication | 2020 |
| Gatton Studios Ltd | Information & communication | 2023 |
| Gauge Mark Limited | Professional & scientific | 2007 |
| GB Aggregates (Holdings) Ltd | Wholesale & retail | 2024 |
| GB Estate Services Ltd | Construction | 2018 |
| GCA Education Ltd | Education | 2020 |
| Gcap Software Ltd | Information & communication | 2017 |
| Geco Ltd | Financial services | 1998 |
| Gemtek Ltd | Information & communication | 2025 |
| Genesis Contracts Ltd | Construction | 2019 |
| Genetic Group Ltd | Real estate | 2023 |
| Genetic Holdco Limited | Financial services | 2025 |
| Genetic Scaffolding Limited | Construction | 2014 |
| Gengo Lingua Limited | Professional & scientific | 2019 |
| Geoff Finn Decorating Limited | Construction | 2017 |
| Georgie Hall Studio Limited | Professional & scientific | 2024 |
| GET ME Back Limited | Arts & recreation | 2019 |
| Getgologistics Limited | Transport & logistics | 2021 |
| Gevel Ltd | Real estate | 2014 |
| GG-292-606 Limited | Real estate | 2024 |
| GHP Builders Limited | Construction | 2022 |
| GHP Construction Limited | Construction | 2010 |
| Giant Colour Limited | Manufacturing | 2020 |
| Gift Wrapped Events Ltd | Arts & recreation | 2019 |
| Girish Patel Property Investments Ltd | Real estate | 2019 |
| Girlchild Films Ltd | Information & communication | 2017 |
| Gkas Site Solutions Limited | Construction | 2017 |
| GL Real Estate Limited | Other services | 2016 |
| Glan Conwy Osprey Ltd | Energy | 2017 |
| Glanville Brown Consultancy Limited | Professional & scientific | 2015 |
| Glass Balustrade Solutions Limited | Other services | 2022 |
| Glenarold Limited | Other services | 2017 |
| Glenbeam Properties Limited | Real estate | 1987 |
| Glencroft and Lindsay Freehold Limited | Real estate | 2013 |
| Glencroft Court Management Limited | Real estate | 1971 |
| Glenhurst Consulting Limited | Professional & scientific | 2007 |
| Global Golf Travel Limited | Administrative & support | 2016 |
| Global Quant Analytics Limited | Professional & scientific | 2013 |
| Global Researchers Limited | Professional & scientific | 2018 |
| Global Securitisation Services Limited | Financial services | 1998 |
| Global Studies UK Limited | Education | 2010 |
| Glorious Food Limited | Hospitality | 2008 |
| Gloryvale Limited | Hospitality | 2017 |
| Gloss London Ltd | Other services | 2018 |
| GMD Mechanical Services Limited | Construction | 2021 |
| Gmpm Enterprises Limited | Financial services | 2020 |
| Go Wheely Ltd | Transport & logistics | 2026 |
| Godomar Limited | Other services | 2012 |
| Golden Cars Gatwick Ltd | Transport & logistics | 2021 |
| Golden Chef (Peterborough) Ltd | Hospitality | 2008 |
| Golden Palace SW Ltd | Hospitality | 2023 |