| Greenstones Limited | Professional & scientific | 2005 |
| Greenstones Team LLP | | 2014 |
| Greentech Systems Ltd | Professional & scientific | 2009 |
| Greenway Advisory Ltd | Professional & scientific | 2025 |
| Greenwood Homecare Holdings Limited | Health & social care | 2018 |
| Greenwood Homecare Ltd | Health & social care | 2016 |
| Greenworld Equipment Limited | Manufacturing | 2014 |
| Greg F Photo Ltd | Transport & logistics | 2023 |
| Greg M Transport Limited | Transport & logistics | 2013 |
| Greg's Services 77 Ltd | Transport & logistics | 2026 |
| Grema Electricals Ltd | Manufacturing | 2020 |
| Grey Construction Holdings Limited | Financial services | 2021 |
| Grey Label Conceptions Ltd | Other services | 2024 |
| Greyfriars Developments Ltd | Construction | 2023 |
| Greyhound Trans Ltd | Transport & logistics | 2018 |
| Greymere Limited | Arts & recreation | 2026 |
| Greyship Developments Ltd | Real estate | 2025 |
| Greystone Landscapes Limited | Administrative & support | 2026 |
| Greyz Ltd | Transport & logistics | 2020 |
| GRF Motor Engineers Limited | Wholesale & retail | 2024 |
| GRG Engineering Ltd | Professional & scientific | 2025 |
| GRH Group Ltd | Financial services | 2024 |
| Gridt Ltd | Information & communication | 2018 |
| Gridtechservices Ltd | Information & communication | 2025 |
| Griffin & Sage Limited | Information & communication | 2010 |
| Griffin and Speed Farms Limited | Agriculture & fishing | 1997 |
| Griffins Automotive Ltd | Wholesale & retail | 2019 |
| Griffiths & Charles Investments Ltd | Real estate | 2021 |
| Grin Media Limited | Information & communication | 2007 |
| Grins and Glow Ltd | Health & social care | 2026 |
| Gripfit Ltd | Extraterritorial | 2024 |
| Grisby Ltd | Hospitality | 2019 |
| Gronav Ltd | Information & communication | 2023 |
| Groom & Butler Group Ltd | Other services | 2023 |
| Groome Properties Limited | Real estate | 2015 |
| Groomguru Ltd | Wholesale & retail | 2014 |
| Gross Klein Wood Ltd | Extraterritorial | 2021 |
| Grosu Transport Limited | Transport & logistics | 2014 |
| Ground Investigation Recruitment Ltd | Administrative & support | 2019 |
| Grounded Research Limited | Financial services | 2024 |
| Groundlay Construction Ltd | Construction | 2022 |
| Groundtrax Limited | Extraterritorial | 2011 |
| Grove Court Management Company (Oundle) Limited | Real estate | 2011 |
| Grove House (Fenstanton) Management Company Limited | Households | 2006 |
| Grove House Real Estate Ltd | Construction | 2021 |
| Grove Social Care Ltd | Health & social care | 2017 |
| Grovelands (Peterborough) Management Company Limited | Households | 1974 |
| Groves Conservatories Ltd | Construction | 2016 |
| Grow Development Solutions Ltd | Professional & scientific | 2012 |
| Grow N Go Limited | Agriculture & fishing | 2007 |
| Grow Power Limited | Wholesale & retail | 2019 |
| Growers Fresh Hub Ltd | Manufacturing | 2014 |
| Growlatics Limited | Professional & scientific | 2025 |
| Growmore Private Ltd | Health & social care | 2023 |
| Grown Local Ltd | Agriculture & fishing | 2010 |
| Growth Metrics Ltd | Information & communication | 2026 |
| Growth Partners for Business Ltd | Professional & scientific | 2024 |
| Growthbite Marketing Ltd | Professional & scientific | 2026 |
| Growthforge Ltd | Professional & scientific | 2025 |
| Grubgo Ltd | Wholesale & retail | 2024 |
| Gryga Trans Ltd | Transport & logistics | 2017 |
| Grzegorz Matanowski Ltd | Transport & logistics | 2012 |
| GS Insolvency & Restructuring Limited | Professional & scientific | 2024 |
| GS520 Limited | Financial services | 2019 |
| GSD Management Limited | Financial services | 2026 |
| Gsgf Limited | Information & communication | 2026 |
| GSH Holdings Limited | Wholesale & retail | 1997 |
| GSK Property Management Limited | Households | 2020 |
| GSL Lettings Ltd | Real estate | 2019 |
| GSN Construction Ltd | Construction | 2016 |
| GSP Agritech Ltd | Manufacturing | 2025 |
| GSP Lettings Ltd | Real estate | 2025 |
| GSR Property & Building Services Ltd | Construction | 2015 |
| GSS Site Services Limited | Construction | 2018 |
| GST Foods Ltd | Hospitality | 2025 |
| Gswdh Limited | Manufacturing | 2019 |
| GT Agricultural Engineering Limited | Manufacturing | 2017 |
| GT Dental Group Limited | Financial services | 2025 |
| GT Motorsport Components Limited | Manufacturing | 2024 |
| GT Shears Ltd | Construction | 2025 |
| GT Trax Limited | Administrative & support | 2005 |
| GTI Hoist Limited | Manufacturing | 2014 |
| GTZ Transport Ltd | Transport & logistics | 2022 |
| Guaranteed Brownie Points Ltd. | Manufacturing | 2013 |
| Guaranty Transport Limited | Transport & logistics | 2025 |
| Guardian Surveyors LLP | | 2013 |
| Guardroom Cyber Ltd | Information & communication | 2019 |
| Guiding Light Residential Care Ltd | Health & social care | 2024 |
| Guinea Savanna Ltd | Wholesale & retail | 2016 |
| Gujjar Investments Limited | Construction | 2019 |
| Gulli Barber 1 Ltd | Other services | 2025 |
| Gulli Barber 2 Ltd | Other services | 2022 |
| Gumnut Properties Ltd | Real estate | 2024 |
| Gunman Airsoft Limited | Arts & recreation | 2008 |
| Gunthorpe Properties Limited | Real estate | 2016 |
| Guntons Developments Limited | Construction | 2025 |
| Gupal Group Ltd | Professional & scientific | 2019 |
| Gurdev Properties Ltd | Real estate | 2023 |
| Gure Ltd | Transport & logistics | 2019 |
| Gurkha Cuisine Ltd | Hospitality | 2024 |