| Golden Ratio Bakes Ltd | Wholesale & retail | 2025 |
| Golden Square Estates Limited | Administrative & support | 2008 |
| Goldenlight Limited | Arts & recreation | 1995 |
| Goldpony Ltd | Arts & recreation | 2011 |
| Golf Today Ltd | Information & communication | 2023 |
| Good Street Developments Limited | Construction | 2023 |
| Goodwork London Ltd | Manufacturing | 2024 |
| Gosh PR Limited | Professional & scientific | 2005 |
| Gosh PR Trustee Company Limited | Professional & scientific | 2026 |
| Gosmart Ltd | Construction | 2023 |
| Goulding Trading Investments Limited | Financial services | 2014 |
| Gourmet Bbq&Ktv Ltd | Hospitality | 2025 |
| Govtech Consulting Limited | Professional & scientific | 2018 |
| Gower Risk Consultants Ltd | Professional & scientific | 2025 |
| GP Plumbing & Construction Ltd | Construction | 2023 |
| GPG - 23HR Ltd | Real estate | 2025 |
| GPG - 25A UGR Ltd | Real estate | 2023 |
| GPG - Management Ltd | Real estate | 2025 |
| GPM10 France Ltd | Administrative & support | 2008 |
| Grabo UK Ltd | Wholesale & retail | 2024 |
| Grace & Co Care Ltd | Health & social care | 2022 |
| Grace Dreams Ltd | Information & communication | 2015 |
| Graceakiva Ltd | Professional & scientific | 2018 |
| Gracelle Marie Limited | Health & social care | 2022 |
| Grafters Recruit Limited | Administrative & support | 2006 |
| Graham Software Solutions Limited | Information & communication | 2014 |
| Grain WIN Group Ltd | Manufacturing | 2025 |
| Grand Innovations Surrey Ltd | Construction | 2024 |
| Grand Resi Ltd | Real estate | 2023 |
| Grand Tour Cycling Ltd | Administrative & support | 2023 |
| Grangewalk Developments Limited | Construction | 1984 |
| Grangewalk Estates Limited | Construction | 2007 |
| Grangewalk Investments Limited | Real estate | 2003 |
| Granit Chartered Architects Limited | Professional & scientific | 1998 |
| GRAVITY76 Ltd | Information & communication | 2016 |
| Graybrany Limited | Other services | 1986 |
| Grayswood Group Limited | Manufacturing | 2015 |
| Grceasy Limited | Administrative & support | 2017 |
| Great Creations London Ltd | Information & communication | 2015 |
| Great Fortune Limited | Real estate | 2023 |
| Great Tech Accessories Ltd | Wholesale & retail | 2021 |
| Great Titchfield Developments Limited | Construction | 2009 |
| Greek Tile Specialist Ltd | Construction | 2023 |
| Green 2U Ltd | Construction | 2026 |
| Green Affinity Limited | Professional & scientific | 2015 |
| Green and Noble Ltd | Water & waste | 2026 |
| Green Arrows AI Ltd | Information & communication | 2024 |
| Green Artificial Intelligence Learning Network Limited | Administrative & support | 2024 |
| Green Hub Ltd | Administrative & support | 2025 |
| Green INK Studio Ltd | Administrative & support | 2016 |
| Green Line Developers Ltd | Construction | 2018 |
| Green Tree Safety Limited | Administrative & support | 2023 |
| Greencurrent Heating Ltd | Construction | 2026 |
| Greeneight Landscapes Ltd | Administrative & support | 2026 |
| Greenfield Avenue Investments Ltd | Real estate | 2026 |
| Greengauge 21 | Transport & logistics | 2005 |
| Greenhill Mushrooms Limited | Wholesale & retail | 2007 |
| Greens Stores Limited | Wholesale & retail | 2010 |
| Greensted Capital Ltd | Professional & scientific | 2015 |
| Greenwood Residential Properties Limited | Real estate | 2012 |
| Greg Hayes Edits Ltd | Information & communication | 2025 |
| Grenoble Legal Limited | Other services | 2020 |
| Grentals & Management Ltd | Households | 2021 |
| Gresham Way (Freehold) Limited | Households | 2011 |
| Grey Ceiling Ltd | Arts & recreation | 2024 |
| Grey Chilli Ltd | Hospitality | 2019 |
| Grey Lion Property Ltd | Real estate | 2021 |
| Gridicity Ltd | Professional & scientific | 2022 |
| Gridstone Group Ltd | Administrative & support | 2026 |
| Griit Ltd | Professional & scientific | 2024 |
| Grimston Scott Limited | Financial services | 2001 |
| Grosvenor Games Limited | Information & communication | 2008 |
| Ground Floor UP Ltd | Water & waste | 2013 |
| GROUNDWORKS360 Ltd | Administrative & support | 2016 |
| Group Evolution (Partnerships) Limited | Wholesale & retail | 2025 |
| Group Evolution Limited | Arts & recreation | 2017 |
| Grove Road (P) Residents Association Limited | Households | 1978 |
| Grovelands Residents Company Limited | Hospitality | 1967 |
| Grow Property Limited | Construction | 2014 |
| Growaer Ltd. | Wholesale & retail | 2022 |
| Growfill Limited | Extraterritorial | 2022 |
| Growlocalcatalysts CIC | Administrative & support | 2025 |
| Growth Operator Agency Ltd | Information & communication | 2024 |
| GS Lion Limited | Hospitality | 2016 |
| GSA Partners Limited | Professional & scientific | 2024 |
| GSC Digital Transformation Ltd | Information & communication | 2023 |
| Gthink Ltd | Construction | 2017 |
| GTP Entertainment Limited | Arts & recreation | 2019 |
| GTP Exhibitions Limited | Administrative & support | 2019 |
| GTP Touring Limited | Administrative & support | 2019 |
| GTR Transmission and Protection Solutions Limited | Professional & scientific | 2010 |
| Guildoak (Dummer) Limited | Construction | 2024 |
| Guildoak (Farms) Limited | Real estate | 2021 |
| Guildoak Limited | Construction | 2022 |
| Guildridge Limited | Professional & scientific | 2005 |
| Gulf Media Services (GMS) Limited | Real estate | 1996 |
| Gulf Trading and Management Limited | Real estate | 1997 |
| Gulfstream Logistics Limited | Transport & logistics | 2003 |
| Gunda Hafner Ltd | Administrative & support | 2016 |
| Gurkha Accounting Ltd | Professional & scientific | 2021 |