| Genassist Homes Ltd | Health & social care | 2021 |
| Genco Build Limited | Construction | 2017 |
| Genco Gruppo Ltd | Construction | 2022 |
| Genco's Project Ltd | Construction | 2023 |
| Gene People | Health & social care | 2011 |
| Generation Shutters Limited | Construction | 2023 |
| Generation Windows (UK) Limited | Construction | 2014 |
| Geneva International Limited | Information & communication | 1999 |
| Genie INK Ltd | Information & communication | 2024 |
| Gensyn Property Limited | Real estate | 2022 |
| Genuine London Limited | Wholesale & retail | 2023 |
| Genus Fashion Limited | Wholesale & retail | 2009 |
| Geoeden Logistics Ltd | Transport & logistics | 2025 |
| Geoex MCG Ltd | Professional & scientific | 2003 |
| Geoghegan Consulting Ltd | Administrative & support | 2013 |
| Georgie Epps Design Ltd | Arts & recreation | 2022 |
| Geothermie Limited | Construction | 2005 |
| Gerrard Projects Limited | Professional & scientific | 1986 |
| Gerry Murphy Ltd | Real estate | 2016 |
| Gervasport, S.L. | | 1998 |
| GES Exterior Cleaning Ltd | Administrative & support | 2021 |
| GET Carter Media Services Limited | Information & communication | 2021 |
| GET Electrical Limited | Manufacturing | 2014 |
| GET Local Jobs Ltd | Professional & scientific | 2023 |
| GET Lost Limited | Wholesale & retail | 2024 |
| GET Moving Ltd | Administrative & support | 2024 |
| GET SET Coaching Limited | Arts & recreation | 2006 |
| GET Simple Solutions Ltd | Information & communication | 2025 |
| GET the Edge UK Training and Consultancy Limited | Education | 2012 |
| GF Fitness Limited | Health & social care | 2005 |
| GFC Tech Ltd | Information & communication | 2015 |
| GFM Designer Limited | Information & communication | 2010 |
| GFO Logistics Limited | Transport & logistics | 2009 |
| GGM Delivery Limited | Transport & logistics | 2023 |
| Ghafouri Traders Limited | Financial services | 2023 |
| Gholam Limited | Information & communication | 2014 |
| Ghost Light Property Ltd | Real estate | 2026 |
| Ghyll Associates Limited | Professional & scientific | 2011 |
| Gibbons Land & Property Co Limited | Real estate | 2024 |
| Gigantic Worx Foundation Limited | Arts & recreation | 2020 |
| Gigantic Worx Holdings Limited | Financial services | 2018 |
| Gigi Enterprises Ltd | Professional & scientific | 2022 |
| Giles Allen Homes Limited | Construction | 2019 |
| Gillett Flooring Contractors Ltd | Construction | 2008 |
| Gilliangladrag Limited | Wholesale & retail | 2010 |
| Ginger Biscuit Entertainment Ltd | Information & communication | 2021 |
| Ginger Nuts Consulting Ltd | Professional & scientific | 2023 |
| Gino REA Racing Ltd | Arts & recreation | 2021 |
| Giro Ltd | Real estate | 2023 |
| Gisely Coffee Limited | Hospitality | 2015 |
| Gisn Limited | Wholesale & retail | 2012 |
| Givfair Ltd | Information & communication | 2025 |
| GJ Dynamics Ltd | Wholesale & retail | 2025 |
| GKD1 Goalkeeping Academy Ltd | Education | 2025 |
| GL Business Development Ltd | Professional & scientific | 2012 |
| Glaslyn Properties Limited | Construction | 1964 |
| Glass Point Ltd | Manufacturing | 2021 |
| Glassbox Productions Limited | Administrative & support | 2012 |
| Glassbox Rights Limited | Administrative & support | 2007 |
| Glassworks Residents Management Company Limited | Households | 2025 |
| Glazed Nutrition Ltd | Manufacturing | 2025 |
| Gleam Globe Health Ltd | Health & social care | 2020 |
| Glendower Torquay Ltd | Hospitality | 2020 |
| Glide Barbers Ltd | Other services | 2022 |
| Glimora Global Ltd | Wholesale & retail | 2025 |
| Global Concierge Solutions Ltd | Administrative & support | 2024 |
| Global Debt Recovery Limited | Financial services | 1991 |
| Global DR Ltd | Real estate | 1982 |
| Global Enterprise Commodities Ltd | Wholesale & retail | 2023 |
| Global Events Management Limited | Professional & scientific | 2020 |
| Global Music Limited | Information & communication | 2019 |
| Global Relief Solutions Limited | Wholesale & retail | 2026 |
| Globavine Limited | Wholesale & retail | 2024 |
| Glocman UK Ltd | Professional & scientific | 2022 |
| Glory Ventures Limited | Real estate | 2024 |
| Gloucester House (Whitelands) Management Limited | Households | 2007 |
| Glownest Salon Limited | Other services | 2026 |
| Glynswood Place (Northwood) Management Company Limited | Households | 2005 |
| GM SCS Ltd | Information & communication | 2013 |
| Gmaq Properties Ltd | Real estate | 2025 |
| GMR Enterprises Limited | Other services | 2015 |
| Gmvr Limited | Administrative & support | 2006 |
| Go Pedal Limited | Extraterritorial | 2013 |
| Go the Distance Research Limited | Professional & scientific | 2019 |
| Goan Cuisine Ltd | Manufacturing | 2015 |
| Godspeed Graphics Limited | Real estate | 1988 |
| GOH Construction Limited | Construction | 2017 |
| Gold Silver Tree Holdings Ltd | Wholesale & retail | 2020 |
| Goldcreek Finance Limited | Financial services | 2024 |
| Golden Cadillac Limited | Real estate | 2024 |
| Golden Design Studio Ltd | Professional & scientific | 2019 |
| Golden Sunset Caribbean Holidays Limited | Administrative & support | 2013 |
| Golden Sunset Caribbean Products Limited | Wholesale & retail | 2013 |
| Golden Vehicle Management Ltd | Administrative & support | 2023 |
| Golding Exhibitions Ltd | Manufacturing | 2018 |
| Goldsmore Ltd | Wholesale & retail | 2020 |
| Goldstar Restaurant Limited | Administrative & support | 2011 |
| Goldstone Research Limited | Professional & scientific | 2014 |
| Golf Communications Limited | Administrative & support | 2010 |
| Golf Tuition Holdings Limited | Financial services | 2020 |