| Frankies Bar Ltd | Hospitality | 2024 |
| Fred and Marguerite Ltd | Professional & scientific | 2024 |
| Fries Like an Angel Ltd | Hospitality | 2023 |
| FS Accountancy Ltd | Professional & scientific | 2012 |
| Fujin Airsoft Limited | Wholesale & retail | 2022 |
| Fullers Hill Church | Other services | 2023 |
| Funshine (Eden Park) Limited | Health & social care | 2006 |
| Furst Media Limited | Information & communication | 2025 |
| Fusilli Limited | Information & communication | 2007 |
| Fusion 2 Limited | Information & communication | 2005 |
| Fusion 3 Technical Ltd | Administrative & support | 2018 |
| Future International Technology Ltd | Information & communication | 2022 |
| Fuzei Limited | Hospitality | 2024 |
| G & M Building Services Limited | Construction | 2004 |
| G L Sales Limited | Wholesale & retail | 2004 |
| G Way & SON Limited | Construction | 1997 |
| G-Aedu Limited | Transport & logistics | 2014 |
| G.Burgess & SON Ltd | Transport & logistics | 2011 |
| G.C. Alarms Limited | Administrative & support | 2012 |
| G.H Imports Ltd | Wholesale & retail | 2024 |
| Gaia Homeware Limited | Manufacturing | 2021 |
| Garcia Michael Floyd Ltd | Professional & scientific | 2025 |
| Gardens Revived Ltd. | Other services | 2018 |
| Garling Projects Limited | Construction | 2011 |
| Gary Autos Limited | Wholesale & retail | 2014 |
| GAS Mark 10 Ltd | Construction | 2026 |
| Gass Productions Limited | Information & communication | 2006 |
| Gatt Creative Ltd | Information & communication | 2019 |
| Gatton Holdings Limited | Real estate | 2007 |
| Gatton Properties Ltd | Real estate | 2023 |
| GB Print Management Services Limited | Manufacturing | 2023 |
| GC Roofing Solutions Ltd | Construction | 2023 |
| GDR Luxe Ltd | Real estate | 2025 |
| GEM Professional Services Ltd | Construction | 2010 |
| General Management & Consultancy Ltd | Administrative & support | 1998 |
| Gently Ltd | Construction | 2019 |
| Gentry Heating Limited | Construction | 2011 |
| Geoffrey Jane Inns Ltd | Hospitality | 2009 |
| Geometrique Limited | Administrative & support | 2016 |
| Getty Media Services Ltd | Professional & scientific | 2023 |
| Ghost Coatings Ltd | Construction | 2020 |
| Gillian Mariner Ltd | Administrative & support | 2025 |
| GIN Service Ltd | Administrative & support | 2025 |
| Glareways (Neasden) Limited | Transport & logistics | 1995 |
| Glass Build Design Ltd | Construction | 2018 |
| Glasshouse UK Group Ltd | Information & communication | 2025 |
| Glimaglog Limited | Information & communication | 1996 |
| GLM Building Group Ltd | Construction | 2025 |
| Global Foodservice Solutions Limited | Wholesale & retail | 2010 |
| Global Healthcare MR Recruitment Specialists Ltd | Other services | 2016 |
| Global Trustees Pension Services Limited | Financial services | 2012 |
| Glow Beyond Medical Aesthetics Ltd | Health & social care | 2025 |
| Glyph Ltd. | Construction | 2009 |
| GN Clinical Consulting Ltd | Health & social care | 2015 |
| Go Gold Sports Clubs Ltd | Education | 2022 |
| Gold (Faversham) Ltd | Construction | 2018 |
| Gold Contracts Ltd | Construction | 2024 |
| Goldenscreen (Kent) Limited | Wholesale & retail | 2005 |
| Golfy Wolfy Ltd | Wholesale & retail | 2025 |
| Goodwen Group Ltd | Real estate | 2025 |
| Gordon Samuel Developments Ltd | Administrative & support | 2012 |
| Gormaruckles Limited | Wholesale & retail | 1999 |
| GP Arch Therapy Ltd | Other services | 2025 |
| GP Properties of London Ltd | Real estate | 2023 |
| GPR Technical Recruitment Limited | Administrative & support | 2016 |
| Grace Hair Design Ltd | Other services | 2013 |
| Graham James Building Services Ltd | Construction | 2018 |
| Graphite Inc. Limited | Information & communication | 1995 |
| Grasshopper Westerham Limited | Hospitality | 2023 |
| Grays Window Cleaning Ltd | Administrative & support | 2021 |
| GRB Properties (Penzance) Limited | Real estate | 2024 |
| Great British Academy of Aesthetic Medicine Limited | Health & social care | 2016 |
| Green Forest Carpentry Ltd | Manufacturing | 2023 |
| Green Forest Homes Ltd | Construction | 2025 |
| Green Guard Group Limited | Wholesale & retail | 2017 |
| Green IS Projects Limited | Agriculture & fishing | 2013 |
| Green IS Ventures Limited | Agriculture & fishing | 2019 |
| Green Knight Multimedia Limited | Information & communication | 2019 |
| Green Mountain Productions Ltd | Arts & recreation | 2021 |
| Green Strategy Consulting Ltd | Professional & scientific | 2024 |
| Greenbow Entertainment Ltd | Other services | 2013 |
| Greenbuild Building Services Ltd | Construction | 2014 |
| Greenbuild Roofing Limited | Construction | 2024 |
| Greenfields Group Holdings Ltd | Financial services | 2025 |
| Greenway Roofing Specialists Ltd | Construction | 2021 |
| Greenway Solar Solutions Ltd | Construction | 2024 |
| Grigg & Crouch Developments Limited | Construction | 2012 |
| Groove Empire Ltd | Arts & recreation | 2019 |
| Grosvenor Decorators London Limited | Administrative & support | 2015 |
| Groupvest Investments 1 LLP | | 2017 |
| Grove Farm Creations Ltd | Information & communication | 2014 |
| Grovenor House Limited | Hospitality | 2024 |
| Grzegorz Construction Limited | Construction | 2007 |
| GS London Markets Ltd | Financial services | 2017 |
| GSI Capital Limited | Financial services | 2022 |
| GSI Wealth Management Ltd | Financial services | 2006 |
| GSI Wills and Trusts LLP | | 2010 |
| GT Associates Ltd | Other services | 2013 |
| Guard Pro Group Limited | Administrative & support | 2016 |
| Guide Total Care Holdings Limited | Financial services | 2016 |