| Greens Business Group Ltd | Transport & logistics | 2019 |
| Greenway Fruit Farm Limited | Agriculture & fishing | 2015 |
| Greenwell Beauty Ltd | Other services | 2022 |
| Greenwoods Business Group Ltd | Transport & logistics | 2023 |
| Green’S Property Maintenance & Decorating Specialists Ltd | Construction | 2025 |
| Greer Property Solutions Limited | Extraterritorial | 2025 |
| Grendon Design Agency Limited | Professional & scientific | 1992 |
| Grenville Avenue Freehold Limited | Households | 2009 |
| Greville Facilities Ltd | Construction | 2023 |
| Grey Model Agency Ltd | Administrative & support | 2015 |
| Grey Tide Ltd | Information & communication | 2026 |
| Grey Tree (Holdings) Ltd | Financial services | 2021 |
| Grey Tree Construction Ltd | Construction | 2023 |
| Grey Tree Developments Ltd | Construction | 2015 |
| Greywood Media Limited | Information & communication | 2025 |
| GRG Partners UK Limited | Administrative & support | 2021 |
| Gribble PUB & Brewery Ltd | Hospitality | 2018 |
| Griffin & Co Jewellery Ltd | Other services | 2024 |
| Grigg Capital Investments & Holdings Limited | Financial services | 2020 |
| Grinterley Limited | Professional & scientific | 1982 |
| Grit Performance Coaching Ltd | Arts & recreation | 2024 |
| Gritt Adventure Ltd | Administrative & support | 2024 |
| Gritt Outdoors Ltd | Wholesale & retail | 2024 |
| Grocock & Day Limited | | 1942 |
| Grooms Yard Limited | Households | 2001 |
| Ground Coffee East Wittering Ltd | Wholesale & retail | 2025 |
| Ground Management Limited | Professional & scientific | 2004 |
| Ground Ready Limited | Construction | 2025 |
| Ground UP Construction Group Ltd | Construction | 2025 |
| Ground Wave Groundworks Ltd | Construction | 2019 |
| Grounded Solutions Limited | Information & communication | 2015 |
| Groundwise Construction Ltd | Construction | 2005 |
| Grove Collective Ltd | Extraterritorial | 2023 |
| Grove Trading Services Limited | Administrative & support | 2004 |
| Grovetowns Limited | Construction | 1982 |
| Grow IT Yourself Limited | Wholesale & retail | 2018 |
| GS Solar Ltd | Construction | 2011 |
| Gs&P Holdings Limited | Professional & scientific | 2015 |
| GS2 Ltd | Administrative & support | 2004 |
| GT4 Sussex Limited | Wholesale & retail | 2024 |
| Guardian Angel Carers Ltd | Health & social care | 2011 |
| Guidant AI Ltd | Information & communication | 2023 |
| Guidant Ventures Ltd | Information & communication | 2023 |
| Guiding Minds Ltd | Health & social care | 2016 |
| Guildhall Law Ltd | Professional & scientific | 2010 |
| Guilfoyle Construction Limited | Construction | 2002 |
| Guillens Kitchens & Bathrooms Ltd | Construction | 2026 |
| Gumshoe Limited | Professional & scientific | 1991 |
| Gupta Vape and Liquid Trading Ltd | Wholesale & retail | 2024 |
| Gurnfix Mobile Smart Repair Ltd | Wholesale & retail | 2026 |
| Guru Distribution Ltd | Wholesale & retail | 2021 |
| GUY Kremer International Limited | Other services | 1994 |
| GUY Lawson Limited | Construction | 2019 |
| GWL Creative Limited | Manufacturing | 2012 |
| GWL Publishing Limited | Information & communication | 2012 |
| Gwms Performance Ltd | Manufacturing | 2019 |
| Gxii Ltd | Information & communication | 2025 |
| Gypsy G Ltd | Wholesale & retail | 2017 |
| H Aaron Consulting Ltd | Professional & scientific | 2025 |
| H C Governance Services Ltd | Public administration | 2017 |
| H D White Ltd | Wholesale & retail | 2012 |
| H Gibson Composites Ltd | Professional & scientific | 2025 |
| H Hornsey Tiling Ltd | Construction | 2022 |
| H Prop Ltd. | Construction | 2004 |
| H R Heaver Limited | Other services | 1957 |
| H&G Limited | Administrative & support | 2009 |
| H&M Coffee Ltd | Hospitality | 2010 |
| H&V Investment Holdings Limited | Real estate | 2020 |
| H-Squared Bookkeeping Limited | Professional & scientific | 2022 |
| H.I.S. Laboratories Limited | Health & social care | 2007 |
| H.M. Scarterfield Ltd | Wholesale & retail | 2002 |
| H.P. Renwick (Chilgrove) Limited | Agriculture & fishing | 1964 |
| H.Stubbs Limited | Real estate | 1953 |
| H.T. Motor Supplies Limited | Extraterritorial | 2005 |
| H.T. Supplies Limited | Wholesale & retail | 1974 |
| H4 Barberz Ltd | Other services | 2024 |
| Haddow Electrical Ltd | Construction | 2003 |
| Haddow Electrical Southern Ltd | Construction | 2021 |
| Haddow Group Services Ltd | Professional & scientific | 2022 |
| Hadleigh Gardens Management Company Limited | Households | 1994 |
| HAF Trading Ltd | Wholesale & retail | 2018 |
| Hague Farms Limited | Agriculture & fishing | 1984 |
| Hailelul Ltd | Health & social care | 2020 |
| Hair by Karl Limited | Other services | 2025 |
| Hair Services Kent Limited | Other services | 2016 |
| Hairbyruby.Wins Limited | Other services | 2025 |
| Half a Camel Productions Limited | Arts & recreation | 2024 |
| Hall & Co Removals Ltd | Transport & logistics | 2024 |
| Halley's Court (Management) Ltd | Households | 1986 |
| Halnaker Commercials Limited | Manufacturing | 2026 |
| Halo Property Management Limited | Real estate | 2009 |
| Halo Transformation Limited | Information & communication | 2017 |
| Hamble Astro Limited | Arts & recreation | 1993 |
| Hambleside Holdings Limited | Professional & scientific | 1981 |
| Hambrook Care Limited | Health & social care | 2011 |
| Hambrook Construction Limited | Construction | 2016 |
| Hambrook Financial Planning Limited | Financial services | 2017 |
| Hamf Ltd | Health & social care | 2017 |
| Hamill Court (Management Company) Limited | Extraterritorial | 2008 |
| Hamilton Beach Limited | Professional & scientific | 2020 |