| Future Forward Coaching Ltd | Professional & scientific | 2025 |
| Future Perfect International Group Ltd | Professional & scientific | 2020 |
| Fxem Money Management UK Ltd | Professional & scientific | 2015 |
| G&C UK Catering Ltd | Hospitality | 2022 |
| G&J Scaffolding Services Ltd | Construction | 2017 |
| G&Man Ltd | Transport & logistics | 2018 |
| G.A.C. Contracts Limited | Manufacturing | 1986 |
| G.A.C.Management Ltd | Financial services | 2024 |
| G.C.A. Associates (London) Ltd | Professional & scientific | 2012 |
| G.E. Bridger Limited | Water & waste | 1983 |
| G12FALSOLUTIONS Ltd | Financial services | 2020 |
| Gabriel's Honey Farm Limited | Manufacturing | 2002 |
| Galleyhill Developments Ltd | Real estate | 2024 |
| Game Changer (London) Ltd | Administrative & support | 2020 |
| Game Changer Barbers Ltd | Other services | 2026 |
| GANDGENTERPRISE21 Ltd | Hospitality | 2025 |
| Gardan Works Ltd | Construction | 2026 |
| Garden Lighting (London) Limited | Construction | 2006 |
| Gardening for Money Limited | Professional & scientific | 2016 |
| Garip and SON Limited | Real estate | 2022 |
| Garm Express Ltd | Transport & logistics | 2019 |
| Gary Smith Photography Ltd | Professional & scientific | 2015 |
| Gasifiq Limited | Water & waste | 2026 |
| Gatewell Properties Limited | Hospitality | 1999 |
| Gatsby 97 Ltd | Hospitality | 2024 |
| Gazph Group Holdings Ltd | Financial services | 2026 |
| GB Painting & Construction Ltd | Construction | 2019 |
| GBG Building Services Ltd | Construction | 2005 |
| GBN Primo Ltd | Wholesale & retail | 2011 |
| GBR Homes Ltd | Construction | 2018 |
| GCL Glazing Limited | Construction | 2013 |
| Geli Contractors Ltd | Construction | 2024 |
| Gelled Limited | Other services | 2018 |
| Gelu Transport Ltd | Transport & logistics | 2024 |
| Gemini Flooring & Building Services Limited | Administrative & support | 2015 |
| General Aesthetic Medicine Ltd | Health & social care | 2021 |
| Generation Excellence Services (GES) Limited | Financial services | 2022 |
| Genesis Media Capital Ltd | Administrative & support | 2017 |
| Gents N18 Barber Limited | Other services | 2022 |
| George & Nicky Ltd | Households | 2025 |
| George K Associates Limited | Professional & scientific | 2015 |
| George Richardson Ltd | Real estate | 2025 |
| Georgia Socials Ltd | Information & communication | 2024 |
| Gepii Ltd | Transport & logistics | 2016 |
| GG Import Ltd | Wholesale & retail | 2026 |
| GH Tech Electrician Ltd | Construction | 2023 |
| Gianna-Azriel Foundation | Other services | 2020 |
| Gibeon Developments Limited | Construction | 2024 |
| GJJ Transport Ltd | Wholesale & retail | 2020 |
| GJS Food Catering Ltd | Hospitality | 2022 |
| Glamour Beauty Lounge Limited | Other services | 2017 |
| Glassex Holdings Limited | Professional & scientific | 1998 |
| Glassex Investments Limited | Financial services | 2023 |
| Glassex Limited | Wholesale & retail | 1981 |
| Glem Group Ltd | Wholesale & retail | 2024 |
| Glenplan Limited | Construction | 2012 |
| Glimmer Glamorous Limited | Other services | 2019 |
| Global Century Services Ltd | Wholesale & retail | 2019 |
| Globalrail Solutions Ltd | Transport & logistics | 2023 |
| Glossy Interiors Ltd | Wholesale & retail | 2018 |
| Glotto Ltd | Professional & scientific | 2021 |
| Gmcj Limited | Other services | 2019 |
| GMS Home Care Support Ltd | Health & social care | 2025 |
| GNR Tech Ltd | Transport & logistics | 2019 |
| Go East Vintage Ltd | Wholesale & retail | 2023 |
| Godfreys Concrete Pumping Ltd | Construction | 2023 |
| GOG Magog Partnership LLP | | 2012 |
| Gokbel Properties Ltd | Real estate | 2024 |
| Gold Chipy Limited | Hospitality | 2025 |
| Gold Door Limited | Construction | 2021 |
| Gold Star Developments Limited | Construction | 2024 |
| Golden Cave Properties Limited | Real estate | 2026 |
| Golden Oven Ltd | Hospitality | 2026 |
| Golden Taurus Ltd | Wholesale & retail | 2019 |
| Golden Travels and Logistics Services (Gtls) Limited | Transport & logistics | 2020 |
| Golden Wholeseller Limited | Manufacturing | 2025 |
| Goldenkeys Property Solutions Limited | Extraterritorial | 2024 |
| Golders Medz Limited | Wholesale & retail | 2021 |
| GOOD2GO*321 Limited | Wholesale & retail | 2022 |
| Gorilla Brazilian JIU Jitsu Ltd | Other services | 2022 |
| Goring Finance Limited | Professional & scientific | 2019 |
| Gotrue Health and Care Ltd | Health & social care | 2022 |
| GP Discotheques Limited | Other services | 2008 |
| Graham Marshall & Associates Limited | Administrative & support | 2003 |
| Grahams Security Solutions Limited | Administrative & support | 2023 |
| Grand Reels UK Ltd | Arts & recreation | 2025 |
| Grand Syty Limited | Hospitality | 2026 |
| Grangeway Hair & Beauty Ltd | Other services | 2015 |
| Grayfield Consulting Ltd | Extraterritorial | 2023 |
| Great Hooks Limited | Real estate | 2023 |
| Great James Street LLP | | 2013 |
| GREEKSGG26 Ltd | Hospitality | 2026 |
| Green Eco Group Ltd | Energy | 2022 |
| Green Grass 2026 Ltd | Real estate | 2026 |
| Green Life Gardening & Landscaping Ltd | Administrative & support | 2026 |
| Green MAN Close Ickleford Management Company Limited | Real estate | 2019 |
| Green Stream Five Ltd | Information & communication | 2023 |
| Green Stream Four Ltd | Information & communication | 2023 |
| Green Stream Three Ltd | Information & communication | 2023 |
| Green Stream Two Ltd | Information & communication | 2023 |