| Greenerbridges Ltd | Agriculture & fishing | 2006 |
| Greenfingers Landscapes and Design Limited | Administrative & support | 2012 |
| Greengoodfuture Partners Limited | Professional & scientific | 2021 |
| Greengrid Electrics Ltd | Construction | 2024 |
| Greenhorizon Fertiscience Limited | Wholesale & retail | 2025 |
| Greenhouse Bioventures Ltd | Professional & scientific | 2025 |
| Greenhouse Communications Ltd | Extraterritorial | 2021 |
| Greening International Trading Co., Ltd | Extraterritorial | 2012 |
| Greenleas Estate Management Limited | Households | 2017 |
| Greenlight Consultants Limited | Professional & scientific | 2018 |
| Greenmixes Ltd | Manufacturing | 2025 |
| Greenode Developments Limited | Professional & scientific | 2007 |
| Greens Coffee & Company Limited | Wholesale & retail | 2009 |
| Greensons Properties Limited | Real estate | 2001 |
| Greentrack Health Ltd | Professional & scientific | 2026 |
| Greentree CAM Ltd | Financial services | 2025 |
| Greenways (Holdings) Limited | Professional & scientific | 2003 |
| Greenways (Ravenswood) Limited | Real estate | 2002 |
| Greenwich Wharf Management Company Limited | Administrative & support | 2010 |
| Greenwood Consulting Services Limited | Professional & scientific | 2022 |
| Greg Thiara Ltd | Information & communication | 2022 |
| Gregg Baldwin Limited | Information & communication | 2016 |
| Greig Ventures Ltd | Financial services | 2023 |
| Grenio Limited | Professional & scientific | 2017 |
| Gresham House Management Company Limited | Households | 2012 |
| Greshams Management Company (Cambridge) Limited | Households | 2005 |
| Gresley Lodge (Investments) Limited | Real estate | 2019 |
| Gresley Lodge Freehold Company Limited | Households | 2018 |
| Gresley Lodge Residents Association Limited | Real estate | 1986 |
| Gretton Books Limited | Information & communication | 2009 |
| Grewit Limited | Financial services | 2022 |
| Grey Area Logistics Ltd | Wholesale & retail | 2026 |
| Grey Seal Advisory Ltd | Professional & scientific | 2023 |
| Grey Toucan Limited | Information & communication | 2019 |
| Greybay Ltd | Information & communication | 2026 |
| Greylees Management Company Limited | Households | 2005 |
| Greys Bars Ltd | Hospitality | 2025 |
| Greys Events Ltd | Hospitality | 2026 |
| Greytech Capital Limited | Financial services | 2026 |
| Greywolf 58 Ltd | Hospitality | 2026 |
| Greywolf Enough Ltd | Hospitality | 2025 |
| Grid Cars Ltd | Wholesale & retail | 2025 |
| Griffey Plastering Services Limited | Construction | 2020 |
| Griffin Davy Saffron Estates LLP | | 2011 |
| Grill 52 Limited | Hospitality | 2026 |
| Grill Munch Ltd | Hospitality | 2026 |
| Grill Newmarket Ltd | Hospitality | 2024 |
| Grill Side Ltd | Hospitality | 2022 |
| Grimm Bach Top K.G Ltd | Extraterritorial | 2019 |
| Grind & Glory Ltd | Wholesale & retail | 2025 |
| Grindley Properties Limited | Real estate | 2022 |
| Gripcaf Capital Limited | Financial services | 2021 |
| Grisaille Studio London Ltd. | Wholesale & retail | 2017 |
| GRN Limited | Construction | 1985 |
| Grooch Ltd. | Wholesale & retail | 2006 |
| Groomi Limited | Administrative & support | 2017 |
| Groslands Development Limited | Construction | 2025 |
| Groslands Limited | Households | 2020 |
| Grosvenor Court (Bracknell) Management Company Limited | Households | 1999 |
| Grosvenor Electrical Contractors Ltd | Construction | 2023 |
| Grosvenor Park Homes Limited | Real estate | 2020 |
| Grosvenor Property Developments (London) Limited | Construction | 2021 |
| Ground Utilities Ltd | Construction | 2015 |
| Grove Books Limited | Information & communication | 1985 |
| Grove Lane Ventures Limited | Financial services | 2024 |
| Grove Partners Limited | Real estate | 2025 |
| Grovers Manor Management Company Limited | Real estate | 2008 |
| Grow Cambridge C.I.C. | Agriculture & fishing | 2026 |
| Growing Consulting Ltd | Wholesale & retail | 2022 |
| Growing Wild Project CIC | Education | 2025 |
| Grownext Limited | Information & communication | 2020 |
| Growth Begins Here Ltd | Wholesale & retail | 2026 |
| Growth EQ Limited | Administrative & support | 2019 |
| Growth Space Ltd | Professional & scientific | 2018 |
| Growthex Ltd | Information & communication | 2024 |
| Growthsense Ltd | Information & communication | 2018 |
| GRP Grating UK Limited | Manufacturing | 2026 |
| GRP Water Consultants Ltd | Other services | 2015 |
| Gruda Composites Ltd | Manufacturing | 2018 |
| Gruebb Limited | Manufacturing | 2008 |
| Grumpy MAN and Van Ltd | Water & waste | 2026 |
| Grup Ltd | Information & communication | 2025 |
| Gryphon Research Ltd. | Information & communication | 2009 |
| Grzegorz. Stacho Ltd | Manufacturing | 2021 |
| GSA Air CAB Tech Ltd | Manufacturing | 2025 |
| GSB Consult Ltd | Professional & scientific | 2023 |
| Gsco Limited | Professional & scientific | 2020 |
| GSL Dardan Holdings Limited | Administrative & support | 2008 |
| GSL Dardan Limited | Administrative & support | 2002 |
| GSL Developments (Hertford) Limited | Real estate | 2025 |
| GSM Investments Limited | Real estate | 2009 |
| Gsotiro Ophthalmology Ltd | Health & social care | 2022 |
| GSP Surface Restoration Ltd | Manufacturing | 2026 |
| Gsvc Trustee Ltd | Hospitality | 2023 |
| Gtaab Ethan Ltd | Wholesale & retail | 2025 |
| GTC Developments Limited | Construction | 2016 |
| GTM Consultants Ltd | Professional & scientific | 2022 |
| Guagua Limited | Wholesale & retail | 2025 |
| Guangdong Silique International Group Hengtong Trading Co., Limited | Wholesale & retail | 2020 |
| Guangsheng Trading Co., Ltd | Wholesale & retail | 2025 |