| G2 Development Consultants Ltd | Professional & scientific | 2011 |
| G2 Empty Homes Ltd | Professional & scientific | 2012 |
| G2 Housing Group Ltd | Construction | 2014 |
| GA Horizons Limited | Professional & scientific | 2026 |
| Gabe & Black Ltd | Other services | 2017 |
| GABERO2 Limited | Public administration | 2019 |
| Gabriel Painting Ltd | Construction | 2021 |
| Gadebridge Limited | Financial services | 2024 |
| Gafflands Limited | Financial services | 2014 |
| Gafstone Limited | Real estate | 2015 |
| Gaisford Marketing Consultancy Limited | Other services | 2018 |
| GAL Property Limited | Construction | 2024 |
| Galaxie Plumbing & Heating Limited | Construction | 2020 |
| Gallery Pictures Limited | Information & communication | 1999 |
| Galquito Developments Ltd | Construction | 2018 |
| Galquito Holdings Ltd | Financial services | 2018 |
| Galquito Limited | Real estate | 2013 |
| Gambit & Foster Catering Ltd | Hospitality | 2021 |
| Game Shop Limited | Wholesale & retail | 2017 |
| Gamevolt Limited | Information & communication | 2023 |
| Garden of EVA Ltd | Manufacturing | 2021 |
| Gardeners (Southern) Limited | Wholesale & retail | 1997 |
| Gari & Co Manning Ltd | Professional & scientific | 2024 |
| Garndell Developments Limited | Construction | 2018 |
| Garnock Training Ltd | Information & communication | 2021 |
| Garsab Ltd | Financial services | 2020 |
| GAS Contracting Services Ltd | Construction | 2019 |
| Gas-Fix Ltd | Construction | 2007 |
| Gasa Group Limited | Financial services | 2013 |
| Gasper GEE Limited | Health & social care | 2021 |
| Gasuz Health & Safety Limited | Professional & scientific | 2020 |
| Gateway Fareham Ltd | Other services | 2006 |
| Gateway Management Limited | Arts & recreation | 2025 |
| Gathering Gate Ltd | Households | 2026 |
| Gavinci Plastering Limited | Construction | 2016 |
| Gazebo Land Ltd | Wholesale & retail | 2020 |
| GBA International Limited | Financial services | 2023 |
| GC Air Conditioning Limited | Construction | 2024 |
| GC@ ISP Ltd | Information & communication | 2018 |
| Gccuk Leasing Limited | Financial services | 2008 |
| GD Plastering Ltd | Construction | 2018 |
| Gdeh Limited | Real estate | 2023 |
| GDM GRP Limited | Professional & scientific | 2007 |
| GDP Holdings Limited | Professional & scientific | 2007 |
| GDP Properties Group Limited | Real estate | 2022 |
| GE Property Management Ltd | Real estate | 2025 |
| Gecko Diet Ltd. | Wholesale & retail | 2018 |
| Geckr Limited | Information & communication | 2023 |
| Geldist Limited | Wholesale & retail | 2014 |
| Gemcap Investments Limited | Real estate | 2017 |
| Gemini Production Services Limited | Information & communication | 2003 |
| Gemma Lighting Limited | Manufacturing | 2009 |
| Gemut Group Ltd | Information & communication | 2025 |
| General Consultation Limited | Wholesale & retail | 2019 |
| Generation Metals Ltd | Water & waste | 2024 |
| Genesis Cancer Care UK Limited | Health & social care | 2006 |
| Genesis Care Holdings Europe Limited | Professional & scientific | 2015 |
| Genesis Care UK Finco Limited | Professional & scientific | 2024 |
| Genesis Specialist Care AUD Finance UK Limited | Professional & scientific | 2018 |
| Genesis Specialist Care Finance UK Limited | Professional & scientific | 2015 |
| Genesis Specialist Care Holding UK Limited | Health & social care | 2015 |
| Genesis Specialist Care UK Limited | Financial services | 2015 |
| Genesis Specialist Care UK NO 2 Limited | Financial services | 2015 |
| Genysis Brand Limited | Hospitality | 2022 |
| GEO Engineering Ltd | Professional & scientific | 2021 |
| Geology in a Jiffy Ltd | Education | 2020 |
| George Ernest Investments Limited | Real estate | 2017 |
| George Gale Rail Ltd | Construction | 2026 |
| Georgina Sarah Gilding Ltd | Arts & recreation | 2025 |
| GET Gorgeous Beauty Limited | Other services | 2013 |
| GET Mullered & Dance Limited | Professional & scientific | 2014 |
| GET Social With Hannah Ltd | Professional & scientific | 2023 |
| Gets House Ltd | Health & social care | 2025 |
| GFD Construction Ltd | Construction | 2024 |
| Gfsd Ltd | Professional & scientific | 2015 |
| GG2020 Ltd | Transport & logistics | 2025 |
| Ghost Blvd Ltd | Wholesale & retail | 2023 |
| Ghsp Ltd | Information & communication | 2011 |
| GIA Logistics Ltd | Transport & logistics | 2025 |
| Giant Van Ltd | Transport & logistics | 2024 |
| Gibbin Family Ltd | Health & social care | 2025 |
| Gibbs Precision Engineering Limited | Manufacturing | 2005 |
| Gibson Whitter Limited | Professional & scientific | 2011 |
| Gibson Whitter Secretaries Limited | Administrative & support | 2012 |
| Gidi & Associates Ltd | Professional & scientific | 2011 |
| Gigi Beauty Aesthetics Ltd | Other services | 2025 |
| Giles Engineering Limited | Professional & scientific | 2013 |
| Gillwell Digital Limited | Information & communication | 2026 |
| Gingko Labs Limited | Information & communication | 2025 |
| Gipping Fabrications Ltd | Manufacturing | 2012 |
| Gipsy Moth IV Limited | Real estate | 2022 |
| Gipsy Moth Management Limited | Real estate | 2022 |
| GJA Steelworks Ltd | Construction | 2014 |
| Gjwilton Ltd | Health & social care | 2019 |
| Gjza Limited | Other services | 2024 |
| GL Electrical Services Southern Ltd | Construction | 2021 |
| Glamping Adventures Limited | Administrative & support | 2025 |
| Glasson Limited | Financial services | 2023 |
| Glassskin LAB Limited | Wholesale & retail | 2025 |
| Glasstec Window and Conservatory Centre Ltd | Construction | 2009 |