| Glenwynn Limited | Information & communication | 2018 |
| Global City Holdings Ltd | Real estate | 2024 |
| Global Commodities International Limited | Wholesale & retail | 1994 |
| Global Glazing Ltd | Construction | 2025 |
| Global House Developments Ltd | Real estate | 2026 |
| Global Trade Wholesale Limited | Wholesale & retail | 2009 |
| Globalcom Ltd | Professional & scientific | 1991 |
| Globaltopz UK Limited | Construction | 2003 |
| Globe Engineering 2000 Limited | Professional & scientific | 2000 |
| Glory Management Limited | Real estate | 2009 |
| Glow Project Ltd | Education | 2026 |
| Glowbonita Ltd | Wholesale & retail | 2026 |
| Glowy Trading Limited | Wholesale & retail | 2022 |
| GM Robins Building Services Limited | Manufacturing | 2025 |
| Gmac Tool and Plant Hire Ltd | Administrative & support | 2018 |
| GMC Design Consultancy Limited | Professional & scientific | 2007 |
| GMF Technology Ltd | Professional & scientific | 2019 |
| GMM Handling Limited | Manufacturing | 2019 |
| GMP Logistic Ltd | Construction | 2017 |
| GNC MCS Ltd | Professional & scientific | 2013 |
| GND Services Ltd | Construction | 2016 |
| Gnex Systems Ltd | Construction | 2008 |
| Go FIX Limited | Professional & scientific | 2018 |
| Go With a Glow Ltd | Other services | 2025 |
| Gobo Ltd | Manufacturing | 2022 |
| Godavari Consultancy Services Limited | Information & communication | 2008 |
| Gods Hand Property Ltd | Construction | 2025 |
| Goetre Uchaf Management Company Limited | Households | 2014 |
| Gold Lion Apartments Limited | Hospitality | 2024 |
| Gold Lion Developments Ltd | Real estate | 2025 |
| Gold Standard Steam Carpet & Upholstery Cleaning Limited | Administrative & support | 2025 |
| Gold Star Furnishing Care Ltd | Administrative & support | 2024 |
| Goldblaze Limited | Financial services | 2008 |
| Goldcross Health and Safety Consultancy Limited | Education | 2015 |
| Goldcross Hseq Limited | Education | 2008 |
| Goldcross NVQ and Training Ltd | Education | 2020 |
| Golden Beach Caravan Park Ltd | Hospitality | 2017 |
| Golden Key London Limited | Real estate | 2017 |
| Golden Sands Holiday Camp (Rhyl) Limited | Hospitality | 1933 |
| Golden Stone Property Ltd | Construction | 2025 |
| Goldforce Contracts Limited | Professional & scientific | 1997 |
| Goldtravel Tours Ltd | Administrative & support | 2018 |
| Golf 2 Golf Limited | Wholesale & retail | 2000 |
| Golfpassportuk Ltd | Information & communication | 2026 |
| Gonda Logistics Ltd | Wholesale & retail | 2025 |
| Good Clean Ltd | Households | 2013 |
| Good Shepherd After School Club Ltd | Health & social care | 2018 |
| Good Shepherd Properties Ltd | Real estate | 2024 |
| Good Tidings Properties Ltd | Construction | 2019 |
| Good Word Collective Ltd | Information & communication | 2023 |
| Gooddayroofing Limited | Construction | 2023 |
| Gooddayscaffolding Limited | Construction | 2022 |
| Goodman Stirling Ltd | Other services | 2021 |
| Goodyport Limited | Wholesale & retail | 2023 |
| Gorgeousmovies Limited | Information & communication | 2015 |
| Gorooms Ltd | Hospitality | 2023 |
| Gotham K Publishing Ltd | Wholesale & retail | 2021 |
| Gourley & Kimber Limited | Wholesale & retail | 2018 |
| Gover Scenery and SET Ltd | Information & communication | 2023 |
| GPN Recruitment Ltd | Administrative & support | 2022 |
| GR Burr Decorators Ltd | Construction | 2010 |
| GR Volta Trade Ltd | Transport & logistics | 2026 |
| GR8 Events Worldwide Limited | Administrative & support | 2009 |
| Grabme Limited | Wholesale & retail | 2003 |
| Grace and Create Ltd | Information & communication | 2019 |
| Grace and Life Christian Inst Ltd | Other services | 2024 |
| Gracemaintenanceservices Ltd | Administrative & support | 2026 |
| Graeme Ellisdon Limited | Wholesale & retail | 1995 |
| Graftpro Ltd | Manufacturing | 2026 |
| Gralaw Limited | Real estate | 2002 |
| Gralaw One Limited | Real estate | 2002 |
| Gralaw Two Limited | Real estate | 2002 |
| Grand Developments and Construction Limited | Construction | 2015 |
| Grand Grooves Ltd | Arts & recreation | 2014 |
| Grandad Digital Limited | Information & communication | 2013 |
| Grange Over Sands Resident Management Company Limited | Households | 2026 |
| Grange Park (Hampsthwaite) Management Company Limited | Households | 2016 |
| Grant Brown Front Gardens Ltd | Administrative & support | 2024 |
| Granville Document Solutions Limited | Administrative & support | 2008 |
| Grazing Group Ltd | Hospitality | 2021 |
| Great Houghton Residential Property Ltd | Households | 2018 |
| Great Todd Investments Ltd | Real estate | 2026 |
| Great Wall Food Catering Limited | Hospitality | 2020 |
| Greatway Solutions Limited | Administrative & support | 2018 |
| Greatwood Property Management Limited | Real estate | 1990 |
| Green Eden Services Ltd | Construction | 2026 |
| Green Hill Farm Caravan Park Ltd | Arts & recreation | 2019 |
| Green JAM Software Limited | Information & communication | 2017 |
| Green Lane Bovingdon Management Limited | Administrative & support | 2003 |
| Green Legend Ltd | Transport & logistics | 2024 |
| Green Oaks Avenue Management Company Limited | Households | 2011 |
| Green Park Property Development Ltd | Real estate | 2015 |
| Green Solutions Group Ltd | Professional & scientific | 2024 |
| Green Street Movies Ltd | Information & communication | 2024 |
| Green Surveyors Ltd | Professional & scientific | 2017 |
| Green Teachers Ltd | Administrative & support | 2020 |
| Green Travel Matters Limited | Professional & scientific | 2023 |
| Green Two Oaks Limited | Real estate | 2012 |
| Green Wilson Ltd | Wholesale & retail | 2022 |
| Greenacre (Englefield Green) Residents Limited | Households | 1982 |