| Gosport Borough Stadium Limited | Arts & recreation | 2025 |
| Gosport Hospitality Group Ltd | Financial services | 2025 |
| Goss Properties Limited | Real estate | 2013 |
| Goudse Schadeverzekeringen N V | | 1968 |
| Gould Ortho Limited | Health & social care | 2023 |
| Goulpar Brickwork Ltd | Construction | 2020 |
| Goulpar Holdings Ltd | Financial services | 2024 |
| Goulpar Scaffolding Ltd | Construction | 2024 |
| Govenor Care Services Limited | Health & social care | 2014 |
| Gower House Management Company (Weybridge) Limited | Households | 2009 |
| GP Glass and Locks Limited | Construction | 2018 |
| GP Health Partners Ltd | Health & social care | 2014 |
| GP Holdings Limited | Real estate | 2013 |
| GPD Consult Ltd | Professional & scientific | 2025 |
| Gpef Ltd | Real estate | 2017 |
| GPM Electrics Limited | Construction | 2006 |
| GPS Motor Company Ltd | Wholesale & retail | 2022 |
| GR Holdings & Investments Limited | Real estate | 2018 |
| GR Recycling Ltd | Administrative & support | 2026 |
| Grab & Go HYD Limited | Hospitality | 2026 |
| Grab N Go Vapes Ltd | Wholesale & retail | 2024 |
| Grace Court (Southsea) Limited | Hospitality | 2002 |
| Graceglen Properties Ltd | Real estate | 2016 |
| Gracepeace Healthcare Solutions Limited | Health & social care | 2026 |
| Graceville Consulting Limited | Professional & scientific | 2020 |
| Grade 1 Internet Solutions Limited | Information & communication | 2000 |
| Gradidge's Ltd. | Information & communication | 2023 |
| Gradient Insight Ltd | Information & communication | 2021 |
| Grain Guru UK Ltd | Wholesale & retail | 2019 |
| Grand Audio Design UK Ltd | Manufacturing | 2023 |
| Grandeur Nail and Beauty Salon Ltd | Other services | 2019 |
| Grange Village Residents Association Limited | Households | 1983 |
| Grant SA Miller Limited | Administrative & support | 2014 |
| Grant Smith Property Ltd | Real estate | 2017 |
| Grape Tree Properties Limited | Real estate | 2026 |
| Grapevine Mortgage Solutions Limited | Other services | 2006 |
| Graphic Design R Ltd | Professional & scientific | 2023 |
| Grasilver Ltd | Wholesale & retail | 2021 |
| Gratitude Private Ltd | Manufacturing | 2016 |
| Gravics Limited | Information & communication | 2005 |
| Gray Manor Events Ltd | Hospitality | 2023 |
| Graychurch Limited | Financial services | 2015 |
| GRB Capital Ltd | Real estate | 2024 |
| Great Big Life Ltd | Education | 2009 |
| Great Service Homecare Limited | Real estate | 2013 |
| Greater Sylhet Community UK Ltd | Other services | 2023 |
| Green Dragon Environmental Limited | Wholesale & retail | 2011 |
| Green Dragon Investments Ltd | Wholesale & retail | 2024 |
| Green Family Holdings Limited | Administrative & support | 2020 |
| Green Frog Trans Ltd | Transport & logistics | 2024 |
| Green Square Building Services Ltd | Professional & scientific | 2020 |
| Green Vault Trading Ltd | Wholesale & retail | 2025 |
| Green Village Holdings Ltd | Financial services | 2024 |
| Greenceci Healthcare Ltd | Health & social care | 2019 |
| Greencorp Limited | Real estate | 2022 |
| Greenfield Insurance Services Ltd | Financial services | 2015 |
| Greenfingered Gardening Services Limited | Administrative & support | 2010 |
| Greengage Projects Limited | Professional & scientific | 1995 |
| Greengate Dairy Limited | Wholesale & retail | 2015 |
| Greenham Park Developments (I.W.) Limited | Professional & scientific | 1995 |
| Greening Consultants Limited | Construction | 2013 |
| Greenlemons Consulting Ltd | Other services | 2012 |
| Greens Waste (UK) Ltd | Water & waste | 2014 |
| Greenzonetech Ltd | Other services | 2021 |
| Greta’S Flower of Life Ltd | Manufacturing | 2025 |
| Grey Cat Games Ltd | Information & communication | 2025 |
| Greyhound Developments UK Limited | Construction | 2024 |
| Gridline Electrical Engineering Ltd | Professional & scientific | 2025 |
| Griffin Construction Solutions Ltd | Construction | 2019 |
| Griffin Leadership Limited | Wholesale & retail | 2021 |
| Griffiths Thermal Insulations Ltd | Construction | 2019 |
| Grill House Group Ltd | Hospitality | 2025 |
| Grill Stop Gosport Ltd | Hospitality | 2024 |
| Grillout Limited | Hospitality | 2016 |
| Grimwood (Southsea) Management Company Limited | Households | 1972 |
| Gripclad Limited | Construction | 2011 |
| Groove Logic Limited | Information & communication | 2018 |
| Groovy Restaurant Limited | Hospitality | 2015 |
| Ground UP Home and Garden Ltd | Construction | 2022 |
| Group 4 Vehicle Logistics Limited | Transport & logistics | 2015 |
| Grove Chambers Services (Southsea) Limited | Administrative & support | 2011 |
| Grovewood Machines Limited | Manufacturing | 2012 |
| Growing Independent Support (Gisuk) Ltd | Health & social care | 2018 |
| GRP (UK) Limited | Wholesale & retail | 2009 |
| GRP Consumable Solutions Limited | Professional & scientific | 2018 |
| GRP Solutions Ltd | Wholesale & retail | 2015 |
| Grue Freeholdings Limited | Real estate | 2011 |
| GS Properties Oxfordshire Limited | Real estate | 2017 |
| GSC Facilities Ltd | Construction | 2022 |
| GT & a Properties Ltd | Real estate | 2022 |
| GT Engineering Ltd | Construction | 2023 |
| GTL Fluid Power Limited | Administrative & support | 2006 |
| Guardian Barriers IP Limited | Administrative & support | 2014 |
| Guardian Maritime Limited | Administrative & support | 2013 |
| Gubernare Ltd | Professional & scientific | 2017 |
| Gudge Heath Takeaway Ltd | Hospitality | 2019 |
| Gugugu Limited | Manufacturing | 2022 |
| Guildford Logistics Ltd | Transport & logistics | 2014 |
| Guilt - Free Gains Limited | Wholesale & retail | 2025 |
| Gujjar SUB Limited | Hospitality | 2026 |