| Greedy Hare Limited | Hospitality | 2023 |
| Greek Gyros HAM Ltd | Hospitality | 2024 |
| Green Consult and Finance Ltd | Energy | 2021 |
| Green Cough Ltd | Arts & recreation | 2024 |
| Green County Developments Limited | Construction | 2003 |
| Green Energy Exim Ltd | Energy | 2025 |
| Green Fifteen Consultancy Limited | Information & communication | 2017 |
| Green Food Trading Ltd | Hospitality | 2018 |
| Green Gate London Ltd | Manufacturing | 2012 |
| Green Globe Construction Limited | Construction | 2017 |
| Green Gold Centre Ltd | Transport & logistics | 2023 |
| Green Guarantee Company Ltd | Financial services | 2021 |
| Green Leaves Services Ltd | Professional & scientific | 2017 |
| Green Parking Limited | Transport & logistics | 2000 |
| Green Village Group Ltd | Wholesale & retail | 2020 |
| Green Welly Limited | Hospitality | 2013 |
| Greenflex Healthcare Services Limited | Public administration | 2020 |
| Greenhouse Music Ltd | Information & communication | 2016 |
| Greenleaf Commercial Limited | Real estate | 2011 |
| Greenovation Gardens Limited | Agriculture & fishing | 2024 |
| Greentime Limited | Real estate | 2000 |
| Greenwoods (Richmond) Limited | Real estate | 2006 |
| Gregoli Ltd | Construction | 2025 |
| Gregory Jewellers Limited | Wholesale & retail | 2003 |
| Grey Court Education Fund | Education | 2011 |
| Greylist Limited | Administrative & support | 2010 |
| Greyscale Consultants Ltd. | Administrative & support | 2016 |
| Grid Business Media Limited | Administrative & support | 2025 |
| Gridsense Ltd | Information & communication | 2025 |
| Griffin House Developments Ltd | Construction | 2026 |
| Griffin Stevens Limited | Real estate | 2016 |
| Griffiths Fire and Security Limited | Professional & scientific | 2024 |
| Griffsworld Limited | Information & communication | 2004 |
| Grinling Productions Limited | Information & communication | 2012 |
| Grove House Pest Control Ltd | Administrative & support | 2012 |
| Grove Strategic Advisors Limited | Information & communication | 2016 |
| Grove Tuition Limited | Education | 2015 |
| Growth Hub Tech Ltd | Information & communication | 2024 |
| Growth Path Partners Limited | Professional & scientific | 2016 |
| Growth Travel Group Limited | Administrative & support | 2023 |
| GSC Grays Limited | Real estate | 2011 |
| Gswd Limited | Information & communication | 2018 |
| GT Brickwork Services Ltd | Construction | 2018 |
| GTG UK Holdings Ltd | Real estate | 2025 |
| Guardian Environmental Solutions Ltd | Professional & scientific | 2018 |
| Guardstead Capital Ltd | Professional & scientific | 2025 |
| Guildhall Investment Corporation Limited | Financial services | 2021 |
| Guleryuz Ltd | Wholesale & retail | 2021 |
| Gulielmus Occamus & Co Ltd | Information & communication | 2019 |
| Gunnerside Management Limited | Other services | 1995 |
| Gunpowder Development Ltd | Construction | 2022 |
| Gunson & Co Independent Financial Advisers Ltd | Financial services | 2017 |
| Gurdaan UK Limited | Real estate | 2010 |
| Gurkha Corner Cash & Carry Limited | Wholesale & retail | 2017 |
| GUY Cheston Consulting Ltd | Professional & scientific | 2021 |
| Guystan Ltd | Real estate | 2024 |
| Guzimports Ltd | Wholesale & retail | 2025 |
| GVL Property Ltd | Hospitality | 2014 |
| Gwendra Limited | Information & communication | 2016 |
| GXP Global Ltd | Professional & scientific | 2019 |
| H and H Concierge Richmond Limited | Other services | 2017 |
| H Davis TM Ltd | Construction | 2023 |
| H G Walker Holdings Limited | Professional & scientific | 2011 |
| H&F Catering Ltd | Hospitality | 2018 |
| H&H Gallery Limited | Wholesale & retail | 2021 |
| H&O Property Group Ltd | Real estate | 2026 |
| H. a. Hyatt & Co Limited | Professional & scientific | 2003 |
| H.A.A.G. Properties Limited | Real estate | 2021 |
| H2 Bros Ltd | Real estate | 2021 |
| H3RO Limited | Information & communication | 2024 |
| H7 Construction Ltd | Construction | 2025 |
| Hacker House Limited | Information & communication | 2015 |
| Haddam House Limited | Financial services | 2022 |
| Haddlesey Lock Limited | Real estate | 2016 |
| Hadstow Properties Limited | Real estate | 1964 |
| Haffner International Ltd | Professional & scientific | 2023 |
| HAI Box W12 Ltd | Real estate | 2021 |
| Hairway to Heaven Limited | Other services | 2019 |
| Halfpenny House Limited | Professional & scientific | 2009 |
| Haling Park Road Development Ltd | Real estate | 2020 |
| HAM and Petersham Rifle & Pistol Club Limited(The) | Arts & recreation | 1954 |
| HAM and Petersham SOS | Health & social care | 2009 |
| HAM Express Ltd | Wholesale & retail | 2022 |
| HAM House Stables Management Limited | Households | 2000 |
| HAM Polo Club Limited | Arts & recreation | 2020 |
| HAM Riverside Lands Limited | Households | 1964 |
| HAM Street RTM Company Limited | Households | 2023 |
| HAM United Group Community Interest Company | Other services | 2010 |
| Hambleton Steel (South) Limited | Real estate | 2006 |
| Hambleton Steel Limited | Construction | 1995 |
| Hambleton Structures Limited | Extraterritorial | 1996 |
| Hamell Communications Limited | Other services | 2009 |
| Hamer Properties Limited | Real estate | 2010 |
| Hamilton_King Limited | Professional & scientific | 2009 |
| Hammond Swimming Pools Limited | Construction | 1998 |
| Ham’S Harvest CIC | Wholesale & retail | 2026 |
| Hanana Sushi Limited | Hospitality | 2021 |
| Handy People Group Ltd | Professional & scientific | 2025 |
| Hanman Limited | Real estate | 2021 |
| Hanrine Limited | Manufacturing | 2016 |