| G.Roxana Ltd | Manufacturing | 2024 |
| G3 Dogs Ltd | Other services | 2018 |
| GA Cambridge Thoracic Ltd | Professional & scientific | 2020 |
| Gabete Avionics Ltd | Manufacturing | 2025 |
| Gabor Peszleg Ltd | Manufacturing | 2018 |
| Gabri SRL Ltd | Manufacturing | 2023 |
| Gabrini Composites Ltd | Manufacturing | 2025 |
| Gabytes Technology Limited | Information & communication | 2018 |
| Gade Residents Management Company Limited | Extraterritorial | 2019 |
| GADGETS4UK Corporation Limited | Wholesale & retail | 2019 |
| Gadgetsuk Limited | Wholesale & retail | 2025 |
| Gagea Ioan Ltd | Manufacturing | 2026 |
| Gagne Renovations Ltd | Construction | 2025 |
| Gahlaut Limited | Health & social care | 2017 |
| Gaia Mechanica Ltd | Professional & scientific | 2020 |
| Gaiabahia.Ai Limited | Professional & scientific | 2025 |
| Gainsborough Court (Management) Limited | Households | 1987 |
| Gainsdale Ltd | Real estate | 2020 |
| Galamar Ltd | Professional & scientific | 2014 |
| Galaxy Battleship Limited | Financial services | 2025 |
| Galaxy Executive Limited | Extraterritorial | 2014 |
| Galaxy International Trading Co., Ltd | Extraterritorial | 2022 |
| Galaxywhip Ltd | Wholesale & retail | 2026 |
| Galdé Ltd | Professional & scientific | 2026 |
| Galenicspec Ltd | Professional & scientific | 2020 |
| Galicia Composites Ltd | Manufacturing | 2024 |
| Galileo (Multimedia) Limited | Information & communication | 1996 |
| Galino Labs Ltd | Professional & scientific | 2025 |
| Galleguez Ltd | Administrative & support | 2019 |
| Gallico Systems Limited | Construction | 2012 |
| Gallops View Management Company Limited | Real estate | 2012 |
| Galore Group Ltd | Wholesale & retail | 2021 |
| Galvanize Developments Ltd | Construction | 2020 |
| Galvanize Engineering Ltd | Construction | 2022 |
| Galvanize Group Ltd | Financial services | 2019 |
| Galvanize Management Ltd | Other services | 2018 |
| Galvanize Properties Ltd | Real estate | 2020 |
| Galvest Limited | Real estate | 2022 |
| Gambit Corporation Ltd | Wholesale & retail | 2017 |
| Gambit Red Ltd | Real estate | 2024 |
| Game Changer 360 Ltd | Information & communication | 2023 |
| Game N Action Group Ltd | Arts & recreation | 2025 |
| Gamebuy Limited | Wholesale & retail | 2023 |
| Gameware Europe Limited | Other services | 2001 |
| Gamify.It Ltd | Information & communication | 2024 |
| Gaming Labs International Ltd | Wholesale & retail | 2023 |
| Gamma Squared Limited | Information & communication | 2022 |
| Gammahouse Ltd | Real estate | 2021 |
| GAN Aviation Ltd | Manufacturing | 2024 |
| Ganesh Medical Ltd | Health & social care | 2010 |
| Ganglion Partners Ltd | Professional & scientific | 2026 |
| Gansu Restaurant Group Ltd | Wholesale & retail | 2024 |
| Ganymede Music Limited | Information & communication | 2016 |
| GAO FEI Consulting Ltd | Professional & scientific | 2008 |
| GAO Xing Global Trading Co Limited | Wholesale & retail | 2025 |
| Gaoxin Technology Co., Ltd | Wholesale & retail | 2025 |
| Gape Estates Limited | Construction | 1998 |
| Gara Cabling Ltd | Information & communication | 2026 |
| Garant Group Limited | Wholesale & retail | 2020 |
| Garcia Services Ltd | Manufacturing | 2026 |
| Gard TEX Ltd | Agriculture & fishing | 2019 |
| Gardasoft Vision Limited | Manufacturing | 1999 |
| Garden Cottage (Cambridge) Limited | Real estate | 2025 |
| Garden Court (Adam & EVE ST) Management Company Limited | Real estate | 2006 |
| Garden Court Cambridge Residents Ltd | Real estate | 2009 |
| Garden Dezign Ltd | Administrative & support | 2019 |
| Garden Joy Co., Ltd | Extraterritorial | 2010 |
| Garden Pastoral Ltd | Agriculture & fishing | 2024 |
| Gardenia Food Varsity Ltd | Hospitality | 2010 |
| Gardner Denley Limited | Real estate | 2019 |
| Gardner Quainton Limited | Manufacturing | 1998 |
| Gardwell Security Limited | Administrative & support | 1996 |
| Gareth Insite Limited | Professional & scientific | 2019 |
| Gareth Ives Plumbing and Heating Engineers Limited | Construction | 2000 |
| Gareth John Training Limited | Education | 2008 |
| Gareth Lloyd Suttle Ltd | Professional & scientific | 2014 |
| Garidis Ltd | Professional & scientific | 2014 |
| Garman Games Limited | Information & communication | 2018 |
| Garmoyle Consulting Limited | Professional & scientific | 2010 |
| Garmoyle Property Holdings Limited | Financial services | 2017 |
| Garner Builders Limited | Construction | 2015 |
| Garner Developments (Cambridge) Ltd | Construction | 2017 |
| Garnsworthy Consulting Limited | Information & communication | 2015 |
| Garrington Asset Management Limited | Real estate | 2013 |
| Garrington Group Limited | Real estate | 2006 |
| Garrington Property Finders Limited | Real estate | 2008 |
| Garroway Co., Limited | Wholesale & retail | 2022 |
| Garside Scandinavia Ltd | Wholesale & retail | 2018 |
| Gary Miller Property Services Ltd | Construction | 2014 |
| GAS 365 Ltd | Construction | 2014 |
| GAS Management Services Limited | Professional & scientific | 1996 |
| Gasco Cambridge Limited | Construction | 2008 |
| Gastrobody Therapeutics Limited | Professional & scientific | 2025 |
| GAT Coeng UK Ltd | Hospitality | 2025 |
| Gatehouse Property Services Limited | Administrative & support | 2019 |
| Gates Communications Ltd | Professional & scientific | 2018 |
| Gatesthames Consulting Limited | Professional & scientific | 2020 |
| Gateway (216) Management Company Limited | Real estate | 2005 |
| Gateway (218) Management Company Limited | Real estate | 2005 |
| Gateway Electrical Ltd | Construction | 2025 |