| Ghsc Solutions Ltd | Professional & scientific | 2023 |
| Gibson Security Solutions Limited | Administrative & support | 2021 |
| Gildair Limited | Construction | 2023 |
| Gildair Services Ltd | Construction | 2019 |
| Gildair Supplies Limited | Wholesale & retail | 2023 |
| Ginger Research Limited | Professional & scientific | 2024 |
| Gingerlillie Boutique Ltd | Wholesale & retail | 2018 |
| Ginny on Frederick Ltd | Wholesale & retail | 2021 |
| Girling Lock (Edmonton Five) Management Company Limited | Households | 1992 |
| Girling Lock (Edmonton Four) Management Company Limited | Households | 1991 |
| Girling Lock (Edmonton One) Management Company Limited | Households | 1990 |
| Girling Lock (Edmonton Two) Management Company Limited | Households | 1991 |
| GL Gardens Limited | Administrative & support | 2023 |
| Glais House Care Limited | Health & social care | 2011 |
| Glazed Creations Limited | Manufacturing | 2021 |
| Glazed Studio Ltd | Professional & scientific | 2025 |
| Glenholme & Brentwood Management Company Limited | Households | 2004 |
| Glenroe HA Holdings CIC | Financial services | 2024 |
| Glenroe Housing Group Limited | Financial services | 2024 |
| Glenroe Living Limited | Real estate | 2020 |
| Glenroe Services Limited | Real estate | 2024 |
| GLO by GLO Ltd | Other services | 2018 |
| Global Cities Limited | Information & communication | 2009 |
| Global EYE Art Limited | Arts & recreation | 2008 |
| Global Psychiatry Group Ltd | Health & social care | 2025 |
| Globex Europe Limited | Professional & scientific | 2010 |
| Globex Evacuation Limited | Professional & scientific | 2017 |
| Glowfront Ltd | Construction | 2020 |
| Glowsmile Limited | Wholesale & retail | 2025 |
| GMN Consultancy Ltd | Professional & scientific | 2025 |
| GMN Solutions Ltd | Construction | 2022 |
| Gmsl Catering Limited | Hospitality | 2022 |
| Go Communications Systems Limited | Administrative & support | 2007 |
| Gold Coast Global Ltd | Information & communication | 2020 |
| Golden Loop Computing Limited | Information & communication | 2022 |
| Golden Slumbers Ltd | Information & communication | 2026 |
| Goldenhalo Limited | | 1988 |
| Golders Manor Estates Limited | Real estate | 2002 |
| Goldings Estate Rare Breeds Farm Limited | Agriculture & fishing | 2020 |
| Goldsmith Decorations Limited | Construction | 2001 |
| Goldson Heath Ltd | Real estate | 2025 |
| Goldster Ltd | Other services | 2020 |
| Golf Travel ORG Limited | Administrative & support | 2011 |
| Good Big Brother Limited | Hospitality | 2020 |
| Goody Red River Limited | Professional & scientific | 2026 |
| Goose Bay Group Ltd | Professional & scientific | 2024 |
| Goose Saffron Walden Ltd | Hospitality | 2025 |
| Gorillas Technologies UK Ltd | Information & communication | 2020 |
| Govica Ltd | Professional & scientific | 2025 |
| GPM Furniture Limited | Manufacturing | 2024 |
| Grabme Internet Ltd | Information & communication | 2007 |
| Grace Tech Solutions Ltd | Information & communication | 2018 |
| Grafix Ninja Ltd | Professional & scientific | 2022 |
| Grainmarket Asset Management LLP | | 2005 |
| Gramercy Global Media Ltd. | Administrative & support | 2015 |
| Grand Parade Estates Limited | Real estate | 2025 |
| Grange Stables Limited | Construction | 2018 |
| Grangemoor Developments Ltd | Construction | 2016 |
| Granne Ventures Limited | Professional & scientific | 2012 |
| Grantcroft IHC Limited | Information & communication | 2024 |
| Grantcroft Limited | Information & communication | 2019 |
| Grantham Fabrications Limited | Professional & scientific | 2003 |
| Grassplant Limited | Administrative & support | 2013 |
| Gravitas Financial Solutions Limited | Wholesale & retail | 2020 |
| GRB Property Management Limited | Administrative & support | 2021 |
| Great Northern Works Limited | Real estate | 2009 |
| Great Western Estates (Wallingford) Limited | Real estate | 2015 |
| Great White Cafe Limited | Information & communication | 2025 |
| Greater London Haulage Limited | Water & waste | 2012 |
| Greek Bazaar Ltd | Wholesale & retail | 2023 |
| Green and Home Limited | Wholesale & retail | 2001 |
| Green Bohemia Limited | Administrative & support | 1998 |
| Green Construction Collaborative Ltd | Professional & scientific | 2023 |
| Green Deal Way Ltd | Professional & scientific | 2015 |
| Green Dove Limited | Financial services | 2019 |
| Green Island Lifestyle Ltd | Wholesale & retail | 2019 |
| Green Lane Warehouse Limited | Real estate | 2022 |
| Green Machine Media Ltd | Administrative & support | 2024 |
| Green Sky Thinking Limited | Professional & scientific | 2012 |
| Green Utopia Ltd | Professional & scientific | 1999 |
| Greenfield Energy Limited | Financial services | 2021 |
| Greenmead Limited | Households | 1985 |
| Greenstart Services Limited | Construction | 2021 |
| Grenville Construction Limited | Construction | 1989 |
| Grey Property Management Limited | Households | 1988 |
| Greyhound Consulting Ltd | Professional & scientific | 2025 |
| Greystone Capital Partners Limited | Professional & scientific | 2015 |
| Greystone Capital Partners UK LLP | | 2015 |
| Greystone Partners Limited | Construction | 2015 |
| Grinfit Limited | Administrative & support | 2020 |
| Griseo Group Ltd | Construction | 2020 |
| GRM Group Holdings Limited | Administrative & support | 2025 |
| Groome & Sons Limited | Construction | 2012 |
| Ground Projects U K Limited | Construction | 2017 |
| Ground Source Drainage Limited | Construction | 2023 |
| Groundsource Group Limited | Construction | 2021 |
| Grovebury Investments Limited | Real estate | 1963 |
| Grow Walkies Ltd | Other services | 2021 |
| Grow Your Photography Studio Limited | Professional & scientific | 2022 |
| Growth Craft Ltd | Professional & scientific | 2021 |