| Golden City Restaurant Ltd | Hospitality | 2021 |
| Golden International Trading Ltd | Wholesale & retail | 2025 |
| Golden Keys Construction Ltd | Construction | 2023 |
| Goldenkey Construction and Glazing Ltd | Construction | 2021 |
| Goldenrod Property Limited | Real estate | 2016 |
| Goldies Restaurants Ltd | Hospitality | 2023 |
| Goldline Asset Management Limited | Financial services | 2001 |
| Goldvista Properties Limited | Real estate | 1998 |
| Good Leaders Consulting Ltd | Education | 2009 |
| Good Leaders K Culture CIC | Education | 2026 |
| Good Leaders Management Ltd | Education | 2025 |
| Goodapl Limited | Transport & logistics | 2018 |
| Gory Ltd | Administrative & support | 2013 |
| Goshen Europe Ltd | Wholesale & retail | 2024 |
| Gourmet Desserts London Ltd | Wholesale & retail | 2020 |
| Gourmet Greens Ltd | Hospitality | 2024 |
| Gourmet HOG Roast Limited | Hospitality | 2019 |
| Gowell Ltd | Construction | 2018 |
| GP Construction London Ltd | Construction | 2023 |
| GP Contractors London Ltd | Construction | 2014 |
| Grab Cars Limited | Transport & logistics | 2017 |
| Grace Miller and Co Limited | Real estate | 2011 |
| Grace Miller Limited | Administrative & support | 2023 |
| Gracebenne (UK) Ltd. | Wholesale & retail | 2014 |
| Gracescale Ltd. | Information & communication | 2011 |
| Graffiti Classics Limited | Real estate | 2002 |
| Grafton Road Residents Company Limited | Households | 1981 |
| Grand Design & Build Limited | Real estate | 2011 |
| Grand Residential Limited | Real estate | 2013 |
| GRAND24 Care Limited | Health & social care | 2018 |
| Granny and Vincent Limited | Real estate | 2012 |
| Grant Guerin Golf Performance Limited | Education | 2024 |
| Gravitas Consultants Limited | Information & communication | 2021 |
| Gravitas Homes Ltd | Real estate | 2023 |
| Gravity Issues Limited | Administrative & support | 2023 |
| Gravitystorm Limited | Information & communication | 2010 |
| Gray Alexander Construction Ltd | Construction | 2019 |
| Graysian Investments Ltd | Information & communication | 2016 |
| Grayswood Properties (Tolworth SBP) Ltd | Real estate | 2025 |
| Grayswood Properties (Tolworth) Limited | Real estate | 2006 |
| Great Clean & Maintenance Ltd | Administrative & support | 2013 |
| Great Portland Investments Ltd | Real estate | 2001 |
| Greekos Gyros Ltd | Hospitality | 2025 |
| Green by Nature Gardens Limited | Administrative & support | 2019 |
| Green Farm (UK) Ltd | Manufacturing | 2014 |
| Green Pear Solutions Ltd | Extraterritorial | 2020 |
| Green Plains Ltd | Professional & scientific | 2022 |
| Greenheart Consulting Ltd | Professional & scientific | 2020 |
| Greenhill Property Services Ltd | Real estate | 2020 |
| Grested Court Management Limited | Households | 2000 |
| Ground ME Limited | Information & communication | 2023 |
| Groves Health Limited | Health & social care | 2025 |
| Groves Medical Group Limited | Health & social care | 2025 |
| Groves Medico-Legal Reporting Ltd | Professional & scientific | 2015 |
| Groves Residential (UK) Ltd | Real estate | 2012 |
| Groves Residential LLP | | 2010 |
| Gsda Group Limited | Professional & scientific | 2023 |
| Guangzhou Tianlei Trading Ltd | Wholesale & retail | 2025 |
| Guildford Cleaners Limited | Other services | 2018 |
| Guilford Tailoring Ltd | Manufacturing | 2024 |
| Guitarxr Ltd | Arts & recreation | 2020 |
| Gulf Pearl International Limited | Construction | 2016 |
| Gulo Joshua Ltd | Professional & scientific | 2022 |
| Gunman Consulting Ltd | Professional & scientific | 2022 |
| GXR Studios Ltd | Information & communication | 2023 |
| Gynour Ltd | Construction | 2023 |
| GYU Limited | Hospitality | 2016 |
| H & J Solutions Ltd | Wholesale & retail | 2022 |
| H Mart Europe Limited | Wholesale & retail | 2009 |
| H&C Londonlife Limited | Wholesale & retail | 2010 |
| H&N Design and Build Limited | Construction | 2020 |
| H3 Care Ltd | Health & social care | 2023 |
| HA Fitness Ltd | Other services | 2011 |
| HAH Logistics Ltd | Transport & logistics | 2024 |
| Haider Landmarks Ltd | Construction | 2025 |
| Hair Cafe Ltd | Other services | 2016 |
| Hairline (SW) Holdings Ltd | Financial services | 2024 |
| Hairline (SW) Ltd | Other services | 2016 |
| Hairline (SW) Property Investment Ltd | Real estate | 2024 |
| Halcyon Coaching Limited | Administrative & support | 2017 |
| Hammersmith Business Management Ltd | Professional & scientific | 2026 |
| Hamptons Consultants Limited | Professional & scientific | 2018 |
| Hamro Venture Ltd | Real estate | 2025 |
| HAN CNB Ltd | Manufacturing | 2026 |
| HAN Collection Ltd. | Wholesale & retail | 2015 |
| HAN River Ltd | Hospitality | 2020 |
| Hanaro Express UK Limited | Transport & logistics | 2017 |
| Hanergy Thin Film Solar UK Limited | Construction | 2012 |
| Hanjan Ltd | Hospitality | 2023 |
| Hansang Kitchen Ltd | Hospitality | 2026 |
| Hansung Food Ltd | Other services | 2021 |
| Hanyoung (UK) Ltd | Administrative & support | 2018 |
| Happy Dinners Ltd | Hospitality | 2021 |
| Happy Friend Fish Bar Ltd | Hospitality | 2023 |
| Hardedgeonline Ltd | Wholesale & retail | 2019 |
| Harmony Capital Partners UK Limited | Administrative & support | 2018 |
| Harmony Capital Services UK Limited | Professional & scientific | 2018 |
| Harmony Global Partners Limited | Administrative & support | 2021 |
| Harrison International Group Ltd | Administrative & support | 2016 |
| Harryharinis Ltd | Real estate | 2017 |