| Generation Timber Framing Limited | Construction | 2026 |
| Geodyst Limited | Extraterritorial | 2020 |
| George Elton Estates Limited | Real estate | 2003 |
| George's Food Hub Community Interest Company | Hospitality | 2024 |
| Georgia Elise Locuming Limited | Professional & scientific | 2022 |
| Georgia Joy Floral Design Ltd | Other services | 2026 |
| Gerry Bingham Services Limited | Wholesale & retail | 2013 |
| Gfxa Limited | Professional & scientific | 2025 |
| GHM Digital Ltd | Professional & scientific | 2020 |
| GHW Services Ltd | Information & communication | 2026 |
| Gilbert's Gang Ltd | Health & social care | 2019 |
| Gilder ROV Limited | Mining & quarrying | 2017 |
| Gilfin Group Limited | Financial services | 2017 |
| Gilfin Limited | Real estate | 1950 |
| Gilmour Consultants Limited | Professional & scientific | 2017 |
| GL Healthcare Ltd | Health & social care | 2019 |
| Glaston Carpets Limited | Wholesale & retail | 2025 |
| Glebe Group Limited | Real estate | 2021 |
| Glebe Holdings (Auriga) Limited | Financial services | 2015 |
| Glide Marketing Consultancy Ltd | Professional & scientific | 2023 |
| Global Bioclean Ltd | Wholesale & retail | 2020 |
| Global Construction Equipment Ltd | Administrative & support | 2024 |
| Glow N Go Limited | Other services | 2024 |
| Glyn Gibson Electrician Ltd | Construction | 2024 |
| GM Communications Ltd | Professional & scientific | 2017 |
| GMK Consultancy Limited | Information & communication | 2015 |
| Go Craft Distribution Ltd | Wholesale & retail | 2019 |
| Goat Barbers Stamford Ltd | Other services | 2026 |
| Goddard Wealth Management Ltd | Professional & scientific | 2020 |
| Golden Briefcase Limited | Financial services | 2024 |
| Golden Power (Solar) Limited | Wholesale & retail | 2024 |
| Goldfarben Ltd | Manufacturing | 2010 |
| Golfbubble Limited | Information & communication | 2020 |
| Good Day Group Limited | Wholesale & retail | 2026 |
| Good Day Holdings Ltd | Financial services | 2026 |
| Good EGG Digital Limited | Administrative & support | 2012 |
| Good Hair Days Stamford Limited | Other services | 2016 |
| Goose Advisory Limited | Professional & scientific | 2025 |
| Goose Property Investments Ltd | Construction | 2017 |
| Gordian Associates Ltd | Information & communication | 2016 |
| Gqsl Limited | Transport & logistics | 2025 |
| Grab Tool Management Limited | Financial services | 2023 |
| Graham Investment Management Limited | Professional & scientific | 2009 |
| Graham Peebles Ltd | Professional & scientific | 2019 |
| Grangedew Limited | Other services | 2006 |
| Gravitas Property Management Limited | Professional & scientific | 2013 |
| Grayston Agricultural Services Limited | Agriculture & fishing | 2014 |
| Great Hadham Country Club Limited | Arts & recreation | 2016 |
| Greatford Consulting Limited | Real estate | 2009 |
| Greatford Estates Ltd | Real estate | 2009 |
| Green Army Limited | Wholesale & retail | 2017 |
| Green Edge UK (Consulting) Limited | Professional & scientific | 2015 |
| Green Finance (Group) Ltd | Other services | 2024 |
| Green Shoots Market Intelligence Ltd | Professional & scientific | 2018 |
| Green Star Hospitality Ltd | Hospitality | 2024 |
| Greenhill Developments (Cambridgeshire) Ltd | Construction | 2022 |
| Greens Heating Solutions Ltd | Construction | 2024 |
| Grey Coffee Limited | Professional & scientific | 2013 |
| Greyfriars Joinery Ltd | Manufacturing | 2025 |
| Gridtech Systems Ltd | Information & communication | 2007 |
| Griffin Translations Ltd | Professional & scientific | 2022 |
| Griffon Plastics Solutions Limited | Professional & scientific | 2015 |
| Groundworks ARB Ltd | Construction | 2024 |
| Grove Park Design Ltd | Arts & recreation | 2010 |
| Grover Procurement Solutions Limited | Professional & scientific | 2015 |
| Growth to Exit Ltd | Professional & scientific | 2026 |
| Grpm Property Services Ltd | Construction | 2022 |
| GRT Automotive Limited | Professional & scientific | 2025 |
| GS Landscaping and Fencing Limited | Administrative & support | 2024 |
| GSE Bull Ltd | Agriculture & fishing | 2019 |
| GSL Mechanical Services Limited | Professional & scientific | 2020 |
| GT Media Services Ltd | Professional & scientific | 2024 |
| Guthrie House Ltd | Real estate | 2019 |
| Guttridge and Smith Limited | Financial services | 2014 |
| Gwash Valley Ltd | Agriculture & fishing | 2021 |
| GWI Productions Ltd | Information & communication | 2026 |
| H & H Farming Ltd | Agriculture & fishing | 2022 |
| H and H Builders Ltd | Construction | 2025 |
| H&F Limited | Information & communication | 2018 |
| H-Works Limited | Professional & scientific | 2010 |
| Haatch (BBB) Nominees Limited | Financial services | 2026 |
| Haatch D2N2 Esaif LP | | 2024 |
| Haatch D2N2 Founder Partner LLP | | 2024 |
| Haatch D2N2 General Partner Limited | Financial services | 2024 |
| Haatch D2N2 Investment Advisor Limited | Financial services | 2024 |
| Haatch D2N2 Nominees Limited | Financial services | 2024 |
| Haatch Desks Limited | Real estate | 2018 |
| Haatch Limited | Information & communication | 2014 |
| Haatch Nominees Limited | Financial services | 2026 |
| Haatch SF III Founder Partner LLP | | 2026 |
| Haatch SF III General Partner LLP | | 2026 |
| Haatch SF III GP Limited | Financial services | 2026 |
| Haatch SF III Nominees Limited | Financial services | 2026 |
| Haatch Ventures Directors Limited | Information & communication | 2018 |
| Haatch Ventures LLP | | 2018 |
| Hadley EHS Limited | Professional & scientific | 2003 |
| Hadrian Industrial Estates Ltd | Real estate | 2023 |
| Hadrian Land Limited | Real estate | 2023 |
| Hadrian Retail Ltd | Real estate | 2024 |
| Hair by Ashlee Mears Ltd | Other services | 2022 |