| Gecko Design Construct Limited | Other services | 2020 |
| Geek Fixers Limited | Information & communication | 2020 |
| Gemini Tech Solutions Limited | Information & communication | 2021 |
| Gemspan Ltd | Financial services | 2016 |
| Genuine Restaurants Limited | Hospitality | 2017 |
| Genuine Technologies Ltd | Information & communication | 2023 |
| Georgie’S Catering Limited | Hospitality | 2020 |
| GET Computer Solutions Limited | Information & communication | 2007 |
| GET SET Global Ltd | Professional & scientific | 2021 |
| GETME2UNI Limited | Education | 2022 |
| GETME2WORK Limited | Administrative & support | 2023 |
| GH Brighton Limited | Professional & scientific | 2005 |
| GH Finance Limited | Professional & scientific | 2005 |
| GH Plymouth Grove Limited | Professional & scientific | 2005 |
| Gibbs Real Estate Limited | Real estate | 2013 |
| Gigawatt Technologies Limited | Information & communication | 2025 |
| Gin's Cleaning Services Ltd | Other services | 2016 |
| Ginger Cat Club Ltd | Wholesale & retail | 2026 |
| Ginger Wizard Entertainment Ltd | Arts & recreation | 2021 |
| Giro Cafe Ltd | Wholesale & retail | 2023 |
| Give Rise Consulting Limited | Other services | 2024 |
| GJA Gates & Railings Limited | Other services | 2021 |
| Glam Property Investments Limited | Real estate | 2018 |
| Glenavon House (Claygate) Management Limited | Households | 2018 |
| Glencroft (95 Epsom Road) Guildford Limited | Households | 1977 |
| GLO Properties Limited | Real estate | 2019 |
| Global Broadcast Media Limited | Information & communication | 2015 |
| Global Crisis Response Limited | Administrative & support | 2023 |
| Global Gambit Media Ltd | Administrative & support | 2026 |
| Global ICT Services Ltd | Information & communication | 2018 |
| Global Tobacco Trading Limited | Administrative & support | 2005 |
| Globe Capital Services Ltd | Professional & scientific | 2025 |
| GO2OOH Consultancy Ltd | Professional & scientific | 2024 |
| Gocrisis Limited | Professional & scientific | 2018 |
| Gogle Enterprises Limited | Construction | 2007 |
| Gold IT Support Ltd | Information & communication | 2015 |
| Goldbeat Entertainment Ltd | Arts & recreation | 2022 |
| Good Mojo Limited | Wholesale & retail | 2015 |
| GPK Series Limited | Arts & recreation | 2017 |
| Grace Gate Ltd | Wholesale & retail | 2020 |
| Gracechurch Bellyard Limited | Hospitality | 1997 |
| Grandfour Ltd | Financial services | 2017 |
| Granny Sands Limited | Professional & scientific | 2015 |
| Graphlink Ltd | Information & communication | 2025 |
| Graphpoint Consulting Ltd | Information & communication | 2020 |
| Grayswood Portfolio Services Limited | Construction | 2008 |
| Grbeesley Consultants Limited | Construction | 2024 |
| Green Haggis Ltd | Professional & scientific | 2025 |
| Green Yard Management Limited | Other services | 2024 |
| Greengate & Irwell Limited | Professional & scientific | 1919 |
| Greenways (Esher) Limited | Construction | 2018 |
| Greenwich Data Labs Limited | Information & communication | 2024 |
| Greenwich UK Jvco Ltd | Administrative & support | 2024 |
| Grenelle Group Ltd | Professional & scientific | 2025 |
| Greycott Limited | Administrative & support | 2008 |
| Greystock Management Limited | Professional & scientific | 2005 |
| Grid Today Limited | Construction | 2025 |
| Grizzly Bear Retirement Company Limited | Financial services | 2024 |
| Grosvenor Energy Limited | Mining & quarrying | 2019 |
| Grosvenor House Publishing Ltd. | Information & communication | 2004 |
| Grove Advisors Limited | Financial services | 2002 |
| Grover Investment PVT Ltd | Real estate | 2025 |
| Grow YOU Limited | Professional & scientific | 2021 |
| Growth Minded Ltd | Professional & scientific | 2023 |
| GS Investment Consultants Ltd | Real estate | 2016 |
| GS Property Consultants Limited | Households | 2005 |
| GS Property IOW Limited | Real estate | 2022 |
| Gtnet Limited | Information & communication | 2018 |
| GUT Feeling Ltd | Administrative & support | 2011 |
| GWR Medical Limited | Health & social care | 2019 |
| Gym and JAB Ltd | Arts & recreation | 2024 |
| H & H Property Holdings (UK) Ltd | Real estate | 2006 |
| H E Harford & SON Limited | Real estate | 1957 |
| H Modarres Limited | Health & social care | 2021 |
| H. & S. Turf Accountants Limited | Real estate | 1962 |
| H.Gilbert Limited | Real estate | 1947 |
| H.T.M. Services Ltd | Real estate | 2003 |
| H2 Commercial Solutions Limited | Professional & scientific | 2012 |
| Hadfield's Consulting Ltd | Information & communication | 2024 |
| Haidar Investments Ltd | Construction | 2021 |
| Haig-Brown Optometry Limited | Health & social care | 2007 |
| Hajo Studio Ltd | Professional & scientific | 2025 |
| Halberton Court Properties Limited | Real estate | 2004 |
| Halfbadger Limited | Information & communication | 2024 |
| Hall Davis Estate Limited | Real estate | 2015 |
| Halo Impact Group Ltd | Professional & scientific | 2019 |
| Hambleton Property Group Limited | Real estate | 2016 |
| Hampton Athletic Community Limited | Education | 2024 |
| Hampton Technology Limited | Manufacturing | 2014 |
| Hannah Chitty Ltd | Professional & scientific | 2015 |
| Happy Dragon IT Services LLP | | 2020 |
| Happy Kaleidoscope Consultants Limited | Health & social care | 2024 |
| Hare & Bone Holdings Limited | Financial services | 2022 |
| Harefield Holdings Limited | Information & communication | 2019 |
| Harmonyoga Ltd | Arts & recreation | 2009 |
| Harpreet Patel Consultancy Services Limited | Professional & scientific | 2016 |
| Hartington Consulting Services Limited | Professional & scientific | 2018 |
| HAUS2 Ltd | Professional & scientific | 2015 |
| Hawk Brown Recruitment Ltd | Administrative & support | 2021 |
| Hawkeye Logistics Ltd | Transport & logistics | 2015 |