| Glory Connie's Ltd | Other services | 2024 |
| Glory Expression Limited | Health & social care | 2024 |
| Glory's Pride Limited | Health & social care | 2013 |
| Glovirt International Ministry Ltd | Other services | 2020 |
| Glow Beauty Salon Supplies Limited | Wholesale & retail | 2023 |
| Glow Beauty Studio Limited | Other services | 2020 |
| Glow Business Consulting Ltd. | Professional & scientific | 2012 |
| Glow by EWA Piotrowska Ltd | Other services | 2025 |
| Glowell GAS & Heating Limited | Construction | 2025 |
| Glowmob by Tamara Limited | Other services | 2025 |
| Glowmob Limited | Wholesale & retail | 2023 |
| Glowtanning Ltd | Other services | 2014 |
| GLR Assessment & Lifting Solutions Ltd | Education | 2015 |
| Glsi Group Limited | Professional & scientific | 2021 |
| Glulam Kindling Ltd | Wholesale & retail | 2026 |
| Glulam Ltd | Wholesale & retail | 2012 |
| Glyde Consulting Limited | Information & communication | 2025 |
| Glylow Ltd | Information & communication | 2025 |
| Glyn Court MAINTENANCE37 (Southampton) Ltd | Households | 2024 |
| Glynnis PVT Ltd | Health & social care | 2019 |
| GM Cargos Ltd | Transport & logistics | 2025 |
| GM Electrical Solutions Ltd | Construction | 2015 |
| GM Plant & Engineering Limited | Professional & scientific | 2018 |
| GM31 Healthcare Ltd | Administrative & support | 2022 |
| GMA Consultant Limited | Professional & scientific | 2025 |
| Gmax Travel Retail Limited | Wholesale & retail | 2020 |
| Gmbavs Ltd | Manufacturing | 2026 |
| GMC Marine Ltd | Professional & scientific | 2026 |
| Gmdo Ltd | Transport & logistics | 2025 |
| GME Ltd | Construction | 2026 |
| GMF Professional Services Ltd | Professional & scientific | 2022 |
| Gmlr Ltd | Real estate | 2020 |
| GMP Properties (Southampton) Limited | Real estate | 2017 |
| Gmp.Star Ltd | Construction | 2020 |
| GMS Refurbishment Ltd | Construction | 2015 |
| Gmsa Homes Limited | Real estate | 2019 |
| Gmsa Solutions Ltd | Water & waste | 2025 |
| Gmss Care Limited | Health & social care | 2025 |
| Gmvd Limited | Construction | 2017 |
| Gn&Sn Limited | Administrative & support | 2013 |
| GND Building Solutions Ltd | Construction | 2026 |
| Gnesha JS Limited | Professional & scientific | 2024 |
| GNJ Drink & Relax Ltd | Hospitality | 2015 |
| Gnostic Cultural Association "Samael AUN Weor" of England Community Interest Company | Education | 2011 |
| GNS Kitchens Limited | Hospitality | 2022 |
| GNU Tools Cauldron Community Interest Company | Administrative & support | 2022 |
| Go ASK Jobs Limited | Administrative & support | 2021 |
| Go Beyond Properties Ltd | Real estate | 2023 |
| Go Checker Cars (SW) Ltd | Transport & logistics | 2009 |
| Go Comfort Limited | Transport & logistics | 2019 |
| Go Figure Bookkeeping Ltd | Professional & scientific | 2011 |
| Go Getting Ltd | Wholesale & retail | 2007 |
| Go Green Concept Ltd | Professional & scientific | 2025 |
| Go Modular Factories (UK) Ltd | Manufacturing | 2019 |
| Go Planner Limited | Professional & scientific | 2025 |
| Go Public Communications Limited | Professional & scientific | 2014 |
| Go Trips and Tours Ltd | Administrative & support | 2025 |
| Go United Ltd | Wholesale & retail | 2025 |
| Go-Eat Ltd | Hospitality | 2020 |
| GO2 Partners Limited | Information & communication | 2012 |
| GO2 Relocation Ltd | Real estate | 2025 |
| GO2DAVE Limited | Other services | 2013 |
| Goasiafood Ltd | Wholesale & retail | 2024 |
| Gobie Homes Ltd | Real estate | 2025 |
| Gocall.Uk Ltd | Transport & logistics | 2023 |
| Godden Commercial Consultancy Ltd | Professional & scientific | 2025 |
| Godding Property Group Ltd | Real estate | 2024 |
| Godiva Recruitment Group Ltd | Administrative & support | 2020 |
| Godlives Always Limited | Extraterritorial | 2021 |
| Gods Providence Limited | Financial services | 2024 |
| Godwin Consulting Group Ltd | Professional & scientific | 2025 |
| Godwin Fencing Specialists Limited | Construction | 2009 |
| Goga Consulting Ltd | Professional & scientific | 2018 |
| Gogabu Ltd | Professional & scientific | 2026 |
| Gogna Investments II Limited | Real estate | 2024 |
| Gogna Investments Limited | Real estate | 2023 |
| Gogna Property Investments Limited | Real estate | 2026 |
| Gognapharm Limited | Wholesale & retail | 2012 |
| Gogo-Deco Ltd | Construction | 2017 |
| Gokiddo Ltd | Wholesale & retail | 2021 |
| Gold Bloch Limited | Real estate | 2009 |
| Gold Bond Marine Engineering Ltd | Professional & scientific | 2019 |
| Gold COD Ltd | Hospitality | 2024 |
| Gold Dagger Limited | Arts & recreation | 2016 |
| Gold Fenix Ltd | Wholesale & retail | 2025 |
| Gold IVY Schumann Trading Ltd | Manufacturing | 2025 |
| Gold Leaf (Gdng) Ltd | Manufacturing | 2011 |
| Gold Tanning Lounge Ltd | Administrative & support | 2025 |
| Gold Tray Services Ltd | Hospitality | 2023 |
| Gold Window Group Ltd | Construction | 2026 |
| Goldash Investment Limited | Wholesale & retail | 2015 |
| Goldash Residents Association Limited | Real estate | 1973 |
| Golden Angel Limited | Construction | 1998 |
| Golden Bricks Ltd | Real estate | 2018 |
| Golden Fish Bar Shop Ltd | Hospitality | 2023 |
| Golden Gecko Climbing Ltd | Arts & recreation | 2014 |
| Golden Grill Southampton Ltd | Hospitality | 2025 |
| Golden House Southampton Limited | Hospitality | 2024 |
| Golden Japan UK Ltd | Wholesale & retail | 2026 |
| Golden Joy Investment Ltd | Real estate | 2021 |