| Ggmr Limited | Transport & logistics | 2013 |
| Gibson's Lodge Limited | Health & social care | 1988 |
| Gicoda Limited | Agriculture & fishing | 2003 |
| Gielogistics Limited | Transport & logistics | 2023 |
| Gilbert & Gilbert (Playsafe) Limited | | 1969 |
| Gill Noble (Leisure) Ltd | Professional & scientific | 2003 |
| Gill Noble Investments Limited | Financial services | 2007 |
| Gillett & Johnston (London) Limited | Manufacturing | 1998 |
| Gillvalley Limited | Administrative & support | 2006 |
| Gilmour (Contractors) Limited | | 1979 |
| Gilo Software Limited | Information & communication | 1996 |
| Giphurst Properties Limited | Real estate | 1977 |
| GLA Network Services Limited | Administrative & support | 2018 |
| Glademount Limited | | 1984 |
| Glazebrook Industries Ltd. | Real estate | 2015 |
| Glebelynn Limited | Manufacturing | 1978 |
| Gledhow Wood Residents Association Limited | Other services | 1975 |
| Glen Estate Limited | Construction | 1953 |
| Glenhurst Interiors Limited | Professional & scientific | 1993 |
| Glenrink Limited | Professional & scientific | 1991 |
| Glenwood Homes (Surrey) Limited | Construction | 2021 |
| Global BIZ Solutions Limited | Professional & scientific | 2014 |
| Global Eloquence Ltd | Professional & scientific | 2010 |
| Global Enhancement Company Ltd | Information & communication | 2004 |
| Global Motion Space Limited | Transport & logistics | 2025 |
| Global Tamil Forum Limited | Other services | 2009 |
| Global Warming World Series Ltd | Arts & recreation | 2024 |
| Globe Healthcare Recruitment Ltd | Administrative & support | 2016 |
| Gloria Enterprises (UK) Limited | Arts & recreation | 2001 |
| Glory Global Investment Ltd | Real estate | 2007 |
| Glory Ltd | Real estate | 1999 |
| Glydon & Guess Limited | Wholesale & retail | 1961 |
| GMT Electrical Services Limited | Manufacturing | 1986 |
| GMT Research Limited | Administrative & support | 2003 |
| GND 2 Limited | Real estate | 2001 |
| Go Appliance Repairs Ltd | Other services | 2024 |
| Goalkey Engineering Limited | | 1978 |
| Gods Child Enterprise Ltd. | Health & social care | 2016 |
| Gods Own Country (UK) Limited | Wholesale & retail | 2002 |
| Godstone Mount Management (RTM) Limited | Real estate | 2004 |
| Godul Pekun Ltd | Hospitality | 2009 |
| Going Green Landscapes Limited | Agriculture & fishing | 2006 |
| Gold Crown (Devon) Ltd | Hospitality | 2017 |
| Gold Electrical Ltd | Construction | 2002 |
| Gold Hill Global Limited | Professional & scientific | 2014 |
| Goldburn Finishers Limited | Manufacturing | 1983 |
| Goldclipper Computing Limited | Information & communication | 1996 |
| Golden Angel 188 Ltd | Hospitality | 2021 |
| Golden Oaks Oxshott LLP | | 2011 |
| Golden Ratio Marketing Ltd | Professional & scientific | 2018 |
| Golden Ratio Records Ltd | Arts & recreation | 2015 |
| Goldenpearl Limited | Energy | 2002 |
| Goldline Petroleum (UK) Limited | Wholesale & retail | 1996 |
| Goldman Freight Ltd | Transport & logistics | 2024 |
| Goldmaster Properties Limited | | 1984 |
| Goldspire Limited | Wholesale & retail | 1980 |
| Golf Connections Ltd | Wholesale & retail | 2025 |
| Gonzo Limited | Information & communication | 2002 |
| Good Excuses Limited | Extraterritorial | 2005 |
| Goode Media Ltd | Information & communication | 2004 |
| Goodline Computing Limited | Information & communication | 1996 |
| Gosmartr Ltd | Information & communication | 2024 |
| GP Locums Limited | Health & social care | 2004 |
| GPC (UK) Limited | Professional & scientific | 2000 |
| Gpprojects Limited | Information & communication | 2002 |
| Grab - M Limited | Hospitality | 2000 |
| Grace Pharm Limited | Health & social care | 2005 |
| Grade One Heating Limited | | 1984 |
| Graficaweb Limited | Information & communication | 2006 |
| Graham Bartholomew Limited | Administrative & support | 1995 |
| Graham Care (YB) Limited | Health & social care | 1995 |
| Graham Music Publishers Limited | Information & communication | 1975 |
| Grainger Planning Associates Limited | Administrative & support | 2003 |
| Grand County Investments Limited | Real estate | 2005 |
| Grand Legacy Limited | Real estate | 2020 |
| Grand Site Services Ltd | Construction | 2001 |
| Grandpalace Ltd | Households | 1996 |
| Grange Court RTM Co Limited | Households | 2011 |
| Grant White Design Ltd | Professional & scientific | 1999 |
| Graphic Display Solutions Ltd | Information & communication | 2019 |
| Graphico (Printing) Limited | Manufacturing | 1981 |
| Graphicquote Limited | Manufacturing | 1986 |
| Gray Point Real Estate Limited | Real estate | 2013 |
| Grazia Carraro Limited | Professional & scientific | 2010 |
| Great Green Barn CIC | Education | 2023 |
| Great Outcomes Limited | Professional & scientific | 2007 |
| Great Woodcote Park Management Limited | Extraterritorial | 1994 |
| Green & Green Limited | Real estate | 1963 |
| Green Arrow Properties Ltd | Real estate | 2020 |
| Green Jacket Heating Services Ltd | Construction | 2015 |
| Green Leys Management Company Limited | Households | 1999 |
| Green PCO Cars Rental Ltd | Wholesale & retail | 2016 |
| Green Willow Care Limited | Health & social care | 2005 |
| Green Willow Property Limited | Health & social care | 2005 |
| Greenhall Properties Ltd | Construction | 2015 |
| Greenpearl Properties Limited | Real estate | 2003 |
| Greenpoint Properties Limited | Real estate | 2000 |
| Greensand Associates Ltd | Professional & scientific | 2004 |
| Greenside Plant Limited | Extraterritorial | 1989 |
| Greenway Estates Limited | Other services | 2004 |