| GH Probate Ltd | Professional & scientific | 2015 |
| GH Wills Limited | Professional & scientific | 2024 |
| Gift Box Philosophy Ltd | Wholesale & retail | 2025 |
| Giftware Base Ltd | Professional & scientific | 2019 |
| Gilbert-Scape Ltd | Administrative & support | 2020 |
| Gilcrete Ltd | Administrative & support | 2019 |
| Gilgen Limited | Administrative & support | 2005 |
| Gill Pharmaceutical Services Limited | Professional & scientific | 2007 |
| GIN Bar Cambs Ltd | Wholesale & retail | 2025 |
| Gina's Private Hire Limited | Transport & logistics | 2019 |
| Gingertraining Ltd | Arts & recreation | 2021 |
| Girassol Community Care Ltd | Health & social care | 2020 |
| Giveaway Frenzy Limited | Wholesale & retail | 2023 |
| GK Land Holding 1 Limited | Real estate | 2023 |
| GK Racing Ltd | Transport & logistics | 2023 |
| Glatton Hall Estates Limited | Extraterritorial | 2008 |
| Glenn Consulting Associates Limited | Information & communication | 2016 |
| Glenside Mortgage Services Ltd | Financial services | 2021 |
| GLK Window Cleaning Ltd | Administrative & support | 2018 |
| Global Business Partners Ltd | Professional & scientific | 2024 |
| Global Pet Relocation Ltd | Other services | 2009 |
| Global Workshop Supplies Limited | Wholesale & retail | 2015 |
| Globe Lane Commercials Ltd | Wholesale & retail | 2011 |
| Glory & Beauty Limited | Wholesale & retail | 2022 |
| Glowkiz Limited | Manufacturing | 2023 |
| Glynwed Overseas Holdings Limited | Professional & scientific | 1929 |
| Glynwed Pipe Systems Limited | Extraterritorial | 1990 |
| GMC Performance Ltd | Professional & scientific | 2020 |
| GN Smith Consultancy Services Ltd | Information & communication | 2019 |
| Gnawtybites Coffee Shop Ltd | Hospitality | 2021 |
| Goagain Ltd | Wholesale & retail | 2023 |
| Godmanchester Dental Ltd | Health & social care | 2020 |
| GOG Logistics Ltd | Transport & logistics | 2025 |
| Gold House Limited | Households | 2025 |
| Gold Twilight Ltd | Wholesale & retail | 2021 |
| Golden Flavours Cuisine Limited | Hospitality | 2023 |
| Golden Pizza Company Huntingdon Ltd | Hospitality | 2025 |
| Golden Sunset Farms Ltd | Agriculture & fishing | 2020 |
| Goldilox Hair Salon Limited | Other services | 2021 |
| Good Company Care Limited | Health & social care | 2023 |
| Good People Recycling Limited | Administrative & support | 2020 |
| Good Season (Cinta) Ltd | Hospitality | 2023 |
| Goode Acquisitions Ltd | Real estate | 2025 |
| Goodfellow Cambridge Limited | Manufacturing | 1974 |
| Goodfellow Europe Limited | Professional & scientific | 1987 |
| Goplay Goclimb Ltd | Arts & recreation | 2021 |
| GOT Transport Ltd | Wholesale & retail | 2019 |
| Gould Builders Ltd | Construction | 2021 |
| GP Optimise Limited | Health & social care | 2026 |
| GPK Holdings Ltd | Real estate | 2026 |
| GR Motors UK Ltd | Wholesale & retail | 2026 |
| GR Pro-Clean Franchising Ltd | Administrative & support | 2020 |
| Grace Gallery & Gifts Ltd | Wholesale & retail | 2023 |
| Grace Hair Ltd | Other services | 2020 |
| Grace Huntingdon UK Limited | Professional & scientific | 2023 |
| Gracefield Home Care Ltd | Health & social care | 2026 |
| Gracey and Associates Limited | Professional & scientific | 2004 |
| Grafham Court Management Limited | Administrative & support | 1973 |
| Grafham Property Maintenance Ltd | Construction | 2022 |
| Grafham Spice Ltd | Hospitality | 2025 |
| Grafton Projects Limited | Wholesale & retail | 1984 |
| Graftpass Limited | Real estate | 1988 |
| Graham Handley Architects Limited | Professional & scientific | 1997 |
| Grain & Jackson (Civil Engineering) Limited | Wholesale & retail | 1981 |
| Grammar School Walk Residents Association Ltd | Real estate | 2016 |
| Grand Piano Cafe' Ltd | Hospitality | 2015 |
| Grandco Property Limited | Real estate | 2023 |
| Grannys Thai Limited | Hospitality | 2022 |
| Granta Financial Services Ltd | Professional & scientific | 2015 |
| Grassroots Enterprises Limited | Wholesale & retail | 2023 |
| Gratitude Hive Limited | Health & social care | 2019 |
| Great Gidding Garage Engineering Limited | Manufacturing | 2007 |
| Great Whyte (Freehold) Company Limited | Households | 2019 |
| Great Whyte Management Company Limited | Households | 2018 |
| Greatorex Opus Limited | Financial services | 2025 |
| Green Car Private Hire Ltd | Transport & logistics | 2026 |
| Green Eco Tech Ltd | Households | 2021 |
| Green Flow Plumbing Ltd | Construction | 2025 |
| Green Pulse Air Source Ltd | Manufacturing | 2026 |
| Green Stairlifts Limited | Professional & scientific | 2016 |
| Green Tiger Limited | Professional & scientific | 2011 |
| Greenacres Farm Boarding Kennels and Cattery Ltd | Agriculture & fishing | 2017 |
| Greenchain Solutions Limited | Extraterritorial | 2023 |
| Greenhouse Management Limited | Wholesale & retail | 2004 |
| Greenkiwi Limited | Professional & scientific | 2015 |
| Greenlight Driver Training Services Limited | Education | 1986 |
| Greentech Apps Limited | Information & communication | 2018 |
| Greentech Surfacing & Civils Ltd | Construction | 2020 |
| Greenway Design Services Ltd | Professional & scientific | 2022 |
| Greenwillows Associates Limited | Other services | 2004 |
| Greenwood Digital Learning Design Ltd | Information & communication | 2024 |
| Greg Kuchna Property Ltd | Real estate | 2019 |
| Greg Trans Ltd | Administrative & support | 2024 |
| Greybeard Marketing Ltd | Professional & scientific | 2025 |
| Greystones Public House Sawtry Limited | Hospitality | 2022 |
| Grig Trans Ltd | Transport & logistics | 2019 |
| Griggs Project Services Limited | Construction | 2011 |
| Grimaud Holdings LLP | | 2018 |
| Grimshaw Composites Limited | Manufacturing | 2025 |
| GRO Pro Ltd | Information & communication | 2023 |