| Guangzhou Chuangyu Industry and Trade Co., Ltd | Wholesale & retail | 2023 |
| Guangzhou Danaya Trading Co., Ltd | Extraterritorial | 2024 |
| Guangzhou Dorman Garment Accessory Limited | Wholesale & retail | 2023 |
| Guangzhou Nano Watch Co., Ltd | Manufacturing | 2023 |
| Guangzhou Shengpalai Trading Co., Ltd | Extraterritorial | 2024 |
| Guangzhou SIM Impex Co. Ltd | Manufacturing | 2022 |
| Guangzhou Simba Trading Co., Ltd | Wholesale & retail | 2023 |
| Guangzhou Yueqi Cultural Development Co., Ltd | Wholesale & retail | 2023 |
| Guangzhou Zhanfeng Auto Parts Co., Ltd | Manufacturing | 2024 |
| Guaranteed Roofing Solutions Ltd | Construction | 2017 |
| Gueleven Ltd | Professional & scientific | 2021 |
| Guerrilla Apps Ltd. | Information & communication | 2016 |
| Guerrilla Street Kitchen Ltd | Hospitality | 2026 |
| Guest Real Estate Limited | Wholesale & retail | 2016 |
| Guestgreet Limited | Hospitality | 2024 |
| Gugi Ltd | Construction | 2012 |
| Guide ME PHD Limited | Professional & scientific | 2024 |
| Guilden Technology Limited | Information & communication | 2019 |
| Guildhouse School Limited | Education | 2010 |
| Guindi Aircraft Services Ltd | Manufacturing | 2024 |
| Guiver & Beales Ltd | Real estate | 2026 |
| Guizhou Holding Co., Ltd. | Extraterritorial | 2013 |
| Guizhou Tiandi Pharmaceutical Co., Ltd | Manufacturing | 2025 |
| Gulseven Medar Limited | Information & communication | 2023 |
| Gumcare Limited | Health & social care | 2018 |
| GUN Smoke Cambridge Ltd | Hospitality | 2017 |
| Gunwharf Quays (Eastside Plaza) Management Company Limited | Households | 2006 |
| Guoben Kitchenware Co., Ltd | Manufacturing | 2026 |
| Guqb Ltd | Wholesale & retail | 2025 |
| Gustavus Investment Ltd | Professional & scientific | 2017 |
| Gusto Milano Limited | Hospitality | 2021 |
| GUT Cheong UK Limited | Hospitality | 2025 |
| Guthrie Court Management Company (Cambridge) Limited | Administrative & support | 2007 |
| Guway Electric Power Energy UK Co., Ltd | Manufacturing | 2021 |
| Guya Trade Co., Limited | Wholesale & retail | 2026 |
| Guyatt House Care Ltd | Health & social care | 2002 |
| GVITOSHKI1204 Ltd | Manufacturing | 2025 |
| GVS Holdings Ltd | Real estate | 2020 |
| GW Pharmaceuticals Limited | Health & social care | 2001 |
| Gwell Limited | Professional & scientific | 2022 |
| Gwhit Ltd | Information & communication | 2025 |
| GWI Investments Limited | Real estate | 2016 |
| GWK Ltd | Construction | 2025 |
| Gwyn-Thomas Associates Limited | | 1977 |
| Gwyther and Ball Ltd | Transport & logistics | 2019 |
| GX Engineering Ltd | Professional & scientific | 2011 |
| GXG Ltd | Manufacturing | 2025 |
| GXP Pharma Limited | Manufacturing | 2024 |
| GXS Therapeutics Limited | Professional & scientific | 2024 |
| Gymteq Ltd | Arts & recreation | 2024 |
| Gynaecare Cambridge Limited | Health & social care | 2025 |
| Gynaeonc Oxford Limited | Health & social care | 2016 |
| Gypform Ltd | Construction | 2021 |
| GZ Silver Jeans Co., Ltd | Manufacturing | 2024 |
| GZI Partners Ltd. | Real estate | 2023 |
| H & H Public House Ltd | Hospitality | 2026 |
| H & P New Homes Ltd | Construction | 2026 |
| H & S Plastering & Construction Ltd | Construction | 2005 |
| H & S Simmons Limited | Extraterritorial | 2014 |
| H 2021 LLP | | 2008 |
| H International Consultant Ltd | Other services | 2016 |
| H Murley Consulting Ltd. | Professional & scientific | 2012 |
| H P a C Limited | Real estate | 2005 |
| H&P Construction Ltd | Construction | 2025 |
| H&T Cherry Hinton Limited | Construction | 2020 |
| H&T Hartington Limited | Construction | 2024 |
| H&T Hills Road Limited | Construction | 2020 |
| H&T Surgeons Limited | Wholesale & retail | 2026 |
| H.Gingell Limited | Agriculture & fishing | 1954 |
| H.J. Paintin Limited | Other services | 1929 |
| H2 Films Ltd | Professional & scientific | 2023 |
| H2H Interiors Cambridge Ltd | Professional & scientific | 2024 |
| H2UPGRADE Ltd | Manufacturing | 2025 |
| H3G Builders Ltd | Construction | 2023 |
| H4A Consulting Ltd | Administrative & support | 2019 |
| HA Construction Builder Ltd | Construction | 2025 |
| Haat Consulting Ltd | Health & social care | 2021 |
| Habibi's Flavours Ltd | Hospitality | 2026 |
| Habitat Technology Co., Ltd | Manufacturing | 2024 |
| Hadar Gabor Composite Ltd | Manufacturing | 2023 |
| Hadarbandi & Oxana Composite Ltd | Manufacturing | 2023 |
| Hadden Electrical Ltd | Administrative & support | 2021 |
| Haddiscoe Country Retreat Limited | Extraterritorial | 2025 |
| Hadley Corporation Limited | Administrative & support | 2008 |
| Haggis Farm Polo Limited | Arts & recreation | 2003 |
| Hahaha Limited | Wholesale & retail | 2025 |
| Haichen Technology Ltd | Information & communication | 2025 |
| Haifa Chemical Industry Group Ltd | Wholesale & retail | 2024 |
| Haigh Law Ltd | Professional & scientific | 2019 |
| Haihang Industry Co., Ltd | Wholesale & retail | 2023 |
| Haihui Equipment Co., Limited | Other services | 2021 |
| Haijin Media Ltd | Wholesale & retail | 2025 |
| Hailoch Ltd | Real estate | 2016 |
| Haina Baichuan Trading Co., Ltd | Manufacturing | 2025 |
| Hair at Michaelas Limited | Other services | 2003 |
| Hair by Franki Ltd | Other services | 2022 |
| Hair by Luigi Limited | Other services | 2022 |
| Hair Exchange Blunham Ltd | Other services | 2025 |
| Hair Specialist Jasmin Ltd | Education | 2026 |
| Hair Systems Cambridge Limited | Other services | 2021 |