| Greek Street Ltd | Hospitality | 2023 |
| Greeklicious 3 Ltd | Hospitality | 2024 |
| Green Dream London Ltd | Administrative & support | 2022 |
| Green Park Souvenirs Limited | Wholesale & retail | 2019 |
| Green Squirrel Holdings Limited | Financial services | 2021 |
| Green Star Investments Limited | Real estate | 2020 |
| Green Street Properties Limited | Construction | 1955 |
| Greenacres Real Estate Ltd | Real estate | 2021 |
| Greenco International Ltd | Construction | 2021 |
| Greene Plant Limited | Administrative & support | 2020 |
| Greenfell Mansions Ltd | Real estate | 2015 |
| Greenfields Build Services Ltd | Construction | 2020 |
| Greenglen Apartments Limited | Real estate | 2024 |
| Greenglen Estates Limited | Real estate | 2018 |
| Greenglen Limited | Construction | 2010 |
| Greenglen Properties Limited | Real estate | 2019 |
| Greentech Building Services Engineers Ltd | Professional & scientific | 2018 |
| Greenwich High Road Management Limited | Households | 2011 |
| Greenwich Way Freehold Limited | Real estate | 2010 |
| Greenworld Car Group Limited | Wholesale & retail | 2023 |
| Gren Mars Limited | Information & communication | 2023 |
| Greywalk Fashion (UK) Ltd | Wholesale & retail | 2018 |
| Grierson Associates Limited | Wholesale & retail | 2016 |
| Griggs Place (Ilford) Management Limited | Households | 2002 |
| Grinch Ltd | Transport & logistics | 2024 |
| Grinnin' Records Limited | Information & communication | 2010 |
| Grisedale 2000 Limited | Wholesale & retail | 1999 |
| Grizzly Vaper Limited | Wholesale & retail | 2019 |
| Grizzly Vaper Xpress Ltd | Wholesale & retail | 2022 |
| Groffman Properties Limited | Real estate | 2016 |
| Groom Limited | Other services | 2017 |
| Grosvenor Group (Print Services) Limited | Manufacturing | 2003 |
| Grosvenor Heights Management Company Limited | Other services | 2004 |
| Grosvenor Road Freeholders Limited | Households | 2003 |
| Ground Control Engineering Construction Limited | Professional & scientific | 2020 |
| Ground UP Training Limited | Education | 2020 |
| Grove Road Property Limited | Real estate | 2024 |
| Grover Holdings Management Ltd | Financial services | 2026 |
| Grovewood House Management Company Limited | Households | 2002 |
| GRS AV Limited | Professional & scientific | 2016 |
| Gruneto Ltd | Construction | 2010 |
| Gryss UK Ltd | Real estate | 2025 |
| GS Construction Group Ltd | Construction | 2021 |
| GS Finance Limited | Financial services | 2013 |
| GS Legal Ltd | Professional & scientific | 2023 |
| GS Mortgage Broking Consultancy Limited | Financial services | 2022 |
| GSD Investment Holdings Ltd | Transport & logistics | 2022 |
| GSJ Housing Ltd | Real estate | 2024 |
| GSR Studio Limited | Manufacturing | 2021 |
| GSS Lettings Ltd | Real estate | 2021 |
| Gsvp Investments Ltd | Real estate | 2020 |
| GTE Consulting Limited | Information & communication | 2018 |
| Guardian Facilities Management Ltd | Households | 2025 |
| Guarding UK Ltd | Public administration | 2003 |
| Guerra Properties LLP | | 2021 |
| Guild of Professional Chauffeurs Limited | Other services | 2017 |
| Guildford Metal Exchange Limited | Extraterritorial | 2008 |
| Gumdirect Ltd | Wholesale & retail | 2025 |
| Gunmakers Arms (Essex) LLP | | 2010 |
| Gunnersbury Place Ltd | Real estate | 2024 |
| Gurcay Limited | Professional & scientific | 2021 |
| GW Power Limited | Construction | 2018 |
| GWG Group Ltd | Construction | 2025 |
| GXL Tribology Limited | Wholesale & retail | 2017 |
| Gynae Specialist Ltd | Health & social care | 2014 |
| Gysa Properties Ltd | Real estate | 2026 |
| GYW Holdings Ltd | Real estate | 2020 |
| H & F Maintenance Solutions Ltd | Construction | 2023 |
| H and G UK Presentation Services Ltd | Professional & scientific | 2020 |
| H R Logistics Inc Ltd | Other services | 2014 |
| H S B Haulage Ltd | Transport & logistics | 2024 |
| H S N Goodswholesalers Ltd | Wholesale & retail | 2023 |
| H S Sagoo Property Lettings Limited | Real estate | 2023 |
| H U Traders Ltd | Hospitality | 2013 |
| H&P Associates Limited | Other services | 2011 |
| H.E.Allen(Builders)Limited | Real estate | 1947 |
| H9 Accountants Limited | Professional & scientific | 2017 |
| HA Canterbury Ltd | Real estate | 2024 |
| Hackney Cooperage Limited(The) | Construction | 1950 |
| Hadar Home Investments Ltd | Real estate | 2025 |
| Hadar Home Investments Two Limited | Real estate | 2025 |
| Haddon Consulting Ltd | Administrative & support | 2012 |
| Hadhoud Group Limited | Financial services | 2025 |
| Hainault Boating Lake Limited | Other services | 2014 |
| Hairplug Services UK Limited | Information & communication | 2023 |
| Halal Hearts Ltd | Other services | 2024 |
| Halcyon Design & Manufacturing Ltd | Manufacturing | 2004 |
| Half a Dozen Limited | Administrative & support | 2009 |
| Haljo Ltd | Real estate | 2026 |
| Halo Construction Limited | Construction | 2015 |
| Hamble Rose Investments Limited | Financial services | 2019 |
| Hambrough Securities Limited | Real estate | 2015 |
| Hamilton Care Services Ltd | Health & social care | 2022 |
| Hamilton Door Services Limited | Administrative & support | 2009 |
| Hamlet Commercial Limited | Construction | 2013 |
| Hamlet Court (BOW) Management Limited | Real estate | 2005 |
| Hands on Skills Ltd | Professional & scientific | 2007 |
| Handspan Limited | Real estate | 2005 |
| Handspot Limited | Real estate | 2005 |
| HANDSWORTH99 Limited | Real estate | 2021 |