| Golden Ship Ltd | Transport & logistics | 2023 |
| Goldstar Transport Holdings Limited | Financial services | 2016 |
| Goldstar Transport Limited | Transport & logistics | 1994 |
| Goodall's Agriculture Limited | Agriculture & fishing | 2014 |
| Goosander Limited | Administrative & support | 2009 |
| Goshawk Terrace Management Company Limited | Real estate | 2015 |
| Gourmet Foods and Beverages Limited | Wholesale & retail | 2012 |
| GP Clean Away Limited | Administrative & support | 2016 |
| GP Trans (Felixstowe ) Ltd | Transport & logistics | 2016 |
| Graham Court (Felixstowe) Limited | Administrative & support | 1996 |
| Grange Convenience Store Limited | Wholesale & retail | 2009 |
| Grange Shipping Limited | Transport & logistics | 1979 |
| Grangeside Fitness Limited | Professional & scientific | 2015 |
| Granville Dragon Limited | Hospitality | 2024 |
| Greenforce Service Limited | Transport & logistics | 2014 |
| Greening Enterprise Ltd | Transport & logistics | 2026 |
| Greenspec Energy Ltd | Professional & scientific | 2023 |
| Greyfriars Flooring Ltd | Wholesale & retail | 2022 |
| Grind Blasters Ltd | Construction | 2021 |
| Grossmann Ltd | Transport & logistics | 2019 |
| Grove Mews (Felixstowe) Limited | Real estate | 2003 |
| Growing Connections C.I.C. | Professional & scientific | 2023 |
| GTG Logistic Services Ltd | Transport & logistics | 2023 |
| Gtsl Group Ltd | Transport & logistics | 2019 |
| Gugi Trans Limited | Transport & logistics | 2025 |
| H&T Recycling Services Ltd | Water & waste | 2017 |
| HAH Limited | Wholesale & retail | 2018 |
| Hailey's Investments Ltd | Health & social care | 2023 |
| Halt HUN Transit Ltd | Transport & logistics | 2018 |
| Hamilton Fish and Chips Ltd | Hospitality | 2019 |
| Hamilton Yummy Limited | Hospitality | 2025 |
| Happisburgh House RTM Company Limited | Households | 2007 |
| Happy Place Properties Limited | Real estate | 2021 |
| Harbour Heating Services Ltd | Construction | 2026 |
| Harbur Logistics Limited | Transport & logistics | 1986 |
| Hardys Plumbing and Heating Ltd | Construction | 2023 |
| Harmony Healthcare Services Ltd | Health & social care | 2025 |
| Harpers Furniture Ltd | Wholesale & retail | 2017 |
| Harris & Nobes: Handmade & Bespoke Creations Ltd | Manufacturing | 2021 |
| Harvest House Limited | Households | 1991 |
| Harwich International (Holdings) Limited | Financial services | 1997 |
| Harwich International Pension Trustee Limited | Administrative & support | 1997 |
| Harwich International Port Limited | Transport & logistics | 1990 |
| Harwich Wharfingers Limited | Financial services | 1985 |
| Hattmore Leasing Ltd | Administrative & support | 2016 |
| Haulage DOT Ltd | Transport & logistics | 2017 |
| Haven Marine Limited | Extraterritorial | 2010 |
| Haydn Rowlandson Distribution Ltd | Transport & logistics | 2024 |
| Hazelwood Property Holding Ltd | Real estate | 2023 |
| HB Counters - Suffolk Ltd | Professional & scientific | 2011 |
| HBS Logistics Limited | Transport & logistics | 2022 |
| Heavenly Footage Limited | Extraterritorial | 2020 |
| Hennessey Lettings Ltd | Professional & scientific | 1998 |
| Heremastaete Limited | Real estate | 2011 |
| Herring Consortium Limited | Real estate | 2007 |
| Hian UK Ltd | Real estate | 2000 |
| High Kebab Shop Ltd | Hospitality | 2023 |
| High Lander Transport Ltd | Transport & logistics | 2023 |
| High Seas Leisure Limited | Arts & recreation | 1971 |
| Himan EN Limited | Hospitality | 2026 |
| Hintonwood East Anglia Limited | Construction | 2014 |
| Honduras Property Mangement Ltd | Real estate | 2022 |
| Hops Services Ltd | Transport & logistics | 2019 |
| Horgan Renovations Ltd | Construction | 2014 |
| Housemaster Limited | Construction | 1987 |
| HR Freehold Limited | Real estate | 2022 |
| Hristov Company Ltd | Transport & logistics | 2018 |
| Hsfcoaching Limited | Other services | 2024 |
| HT Handyman Services Ltd | Construction | 2024 |
| Human Focused AI Solutions Ltd | Administrative & support | 2025 |
| Hutchison Logistics (UK) Limited | Transport & logistics | 1961 |
| Hutchison Ports (UK) Holding Limited | Financial services | 1991 |
| Hutchison Ports (UK) Limited | Professional & scientific | 1997 |
| Hutchison Ports B100 Limited | Financial services | 2023 |
| Hutchison Ports Egypt Investments Limited | Financial services | 2023 |
| Hutchison Ports Europe Limited | Professional & scientific | 1995 |
| Hutchison Ports Sokhna Limited | Financial services | 2023 |
| Hutchison Ports Ukraine Investments Limited | Financial services | 2026 |
| HZW Transport Ltd | Transport & logistics | 2015 |
| I-Woman Community Platform CIC | Administrative & support | 2024 |
| I-Woman Platform Limited | Administrative & support | 2024 |
| I.A.M Trans Ltd | Transport & logistics | 2024 |
| Iain Cochran Limited | Professional & scientific | 2018 |
| Iboer Ltd | Other services | 2020 |
| Ice Advantage Ltd | Administrative & support | 2025 |
| Ice Cool Cars Limited | Wholesale & retail | 2017 |
| Ice Cool Girls Limited | Extraterritorial | 2010 |
| Ice Cool Guys Limited | Manufacturing | 2020 |
| Ice Cool Water Limited | Manufacturing | 2020 |
| Ifwg Consultancy Limited | Information & communication | 2012 |
| IK Logistics Ltd | Transport & logistics | 2014 |
| IKA Karate Academy Ltd | Arts & recreation | 2021 |
| ILC Incorporated Ltd | Wholesale & retail | 2019 |
| Iliin Ltd | Transport & logistics | 2019 |
| ILN Transport Ltd | Transport & logistics | 2019 |
| Impact Landscaping (East Anglia) Limited | Administrative & support | 2001 |
| IMR Transport Ltd | Transport & logistics | 2022 |
| Infinity Container Logistics Ltd | Transport & logistics | 2016 |
| Ingile Haulage Ltd | Transport & logistics | 2024 |
| Inka Transport Ltd | Transport & logistics | 2013 |