| GCC Global Resources Limited | Financial services | 2019 |
| GCC Green Capital Assets 1 Limited | Financial services | 2022 |
| GCC Litigation Funding Limited | Financial services | 2021 |
| GCC Property Holdings Limited | Financial services | 2017 |
| GCP Driver Services Limited | Transport & logistics | 2017 |
| Geli Publishing Limited | Information & communication | 2017 |
| Gella Care Services Ltd | Health & social care | 2013 |
| Gems Property (AMB) Limited | Real estate | 2021 |
| Gentas Properties Limited | Households | 2019 |
| Gentle Haven Care Home Ltd | Health & social care | 2024 |
| Gerseg Ltd | Other services | 2018 |
| GET a Grip Maintenance Limited | Construction | 2025 |
| GET Amplified Limited | Information & communication | 2023 |
| GET Amplified Media Limited | Information & communication | 2026 |
| GET Shift Done Ltd | Financial services | 2020 |
| Getpacking Limited | Manufacturing | 1999 |
| Gibson Installations Limited | Construction | 2012 |
| Giggs & Bell Limited | Real estate | 2016 |
| Giggs & Co Lettings Limited | Real estate | 2020 |
| Giggs & Co Sales Limited | Real estate | 2012 |
| Giggs & Mcgrath (Hunts) Limited | Real estate | 2022 |
| Giggs & Mcgrath Limited | Real estate | 2018 |
| Gilbert Property Holdings Ltd | Real estate | 2021 |
| Gilbert's Butchers Buckden Ltd | Wholesale & retail | 2023 |
| Gilbert's Butchers St.Ives Ltd | Wholesale & retail | 2023 |
| Gilbert’S Family Butchers Ltd | Wholesale & retail | 2019 |
| Gill and Perry Ltd | Wholesale & retail | 2007 |
| Ginai Healthcare Limited | Extraterritorial | 2024 |
| Girls Night in! Ltd | Health & social care | 2019 |
| GIS Infrastructure Services Ltd | Construction | 2024 |
| GJ Worker (Builder) Ltd. | Administrative & support | 2014 |
| GJK Pharma Ltd. | Professional & scientific | 2011 |
| GK 2021 Ltd | Transport & logistics | 2021 |
| GKH Project Management Ltd | Professional & scientific | 2015 |
| Glass Machine (Sun Tool) Limited | Extraterritorial | 1987 |
| Glasside Technologies Ltd | Professional & scientific | 2014 |
| Glassware Branding Ltd | Manufacturing | 2019 |
| Glebe Farm Beverages Ltd | Manufacturing | 2019 |
| Glebe Farm Foods Limited | Manufacturing | 2008 |
| GLO Cosmetic Aesthetics Ltd | Other services | 2022 |
| Global Adjuvants Company Ltd | Manufacturing | 2014 |
| Global Crop Improvement Company Ltd | Manufacturing | 2014 |
| Global Data Facilitation Services Ltd | Professional & scientific | 2018 |
| Global Erecting Sign Services (UK) Limited | Professional & scientific | 2009 |
| Global Erecting Sign Services Limited | Administrative & support | 2003 |
| Global Transfer Market Ltd | Administrative & support | 2026 |
| Glomac Engineering Limited | Manufacturing | 2019 |
| Gloucester Eats Limited | Hospitality | 2020 |
| GM Aviation Ltd | Transport & logistics | 2025 |
| GNC Electrical Ltd | Construction | 2018 |
| Gobimed Limited | Wholesale & retail | 1995 |
| Goff Golf Limited | Wholesale & retail | 2020 |
| Gold Label Roofing Ltd | Construction | 2025 |
| Gold Storm Ltd | Other services | 2018 |
| Golden Cowboy Ltd | Administrative & support | 2021 |
| Golden Lining Ltd | Other services | 2020 |
| Golden Ratio Properties Ltd | Real estate | 2025 |
| Goldleaf Jewellers Ltd | Manufacturing | 2023 |
| Goldrock Bullion Limited | Information & communication | 2024 |
| Goldstraw Goldsmiths Ltd | Wholesale & retail | 2026 |
| Gollins Electrical Ltd | Construction | 2013 |
| Gonogo Ratings and Reviews Ltd | Information & communication | 2025 |
| Good Riddance Ltd | Other services | 2026 |
| Goodall Project Services Ltd | Construction | 2012 |
| Goodthink Ltd | Information & communication | 2014 |
| Gossip Hairdressing (ST. Neots) LLP | | 2016 |
| GOT the T Shirt International Limited | Wholesale & retail | 2017 |
| Gott Plumbing & Heating Ltd | Construction | 2024 |
| Gough & Jones Homes Limited | Real estate | 2023 |
| Grafham Water Cycling Ltd | Wholesale & retail | 2026 |
| Granite 5 Limited | Information & communication | 1999 |
| Granophyre Limited | Administrative & support | 2020 |
| Gransden and District Agricultural Society | Other services | 2009 |
| Granta Processors Ltd | Agriculture & fishing | 2014 |
| Grantsdale Ltd | Other services | 2018 |
| Great Onyx Consultancy Limited | Administrative & support | 2017 |
| Green Innovation Solutions Company Ltd | Wholesale & retail | 2021 |
| Greenserveuk Limited | Wholesale & retail | 2012 |
| Gregoire Property Ltd | Real estate | 2023 |
| Grey Area Games Ltd | Information & communication | 2025 |
| Greyoak Property Ltd | Real estate | 2024 |
| GRH Accountancy Limited | Professional & scientific | 2008 |
| Griffith Property Investments Limited | Real estate | 2023 |
| Grigg HR Ltd | Professional & scientific | 2025 |
| Grocery Consulting Ltd | Professional & scientific | 2021 |
| Grove Farm (Little Paxton) Management Company Limited | Households | 1986 |
| GT Marketing OPS Consulting Ltd | Professional & scientific | 2025 |
| Guffar Contracting Ltd | Other services | 2018 |
| Gunda Health Care Services Limited | Health & social care | 2014 |
| GVH Construction Services Limited | Administrative & support | 2015 |
| GW Care and Support Solutions Ltd | Health & social care | 2016 |
| HA Law Consulting Limited | Professional & scientific | 2025 |
| HA Law Firm Consulting Limited | Professional & scientific | 2025 |
| HA Law Firm Corporate Management Limited | Professional & scientific | 2025 |
| HA Law Firm Investment Management Limited | Professional & scientific | 2025 |
| HA Law Firm Investments Limited | Professional & scientific | 2025 |
| Haas Labs Ltd | Information & communication | 2021 |
| HAG Beauty Limited | Extraterritorial | 2023 |
| Hall Consultancy Group Ltd | Professional & scientific | 2025 |
| Hamels Consultants LLP | | 2004 |