| GEN SOL Ltd | Professional & scientific | 2026 |
| Genesis Consultancy Services Limited | Professional & scientific | 2022 |
| GET UP Traffic Management Ltd | Construction | 2023 |
| Gicers UK Limited | Administrative & support | 1998 |
| Gisbourne Financial Recruitment Limited | Administrative & support | 1999 |
| GJB Eyecare LLP | | 2022 |
| GK Lettings and Management Ltd | Real estate | 2024 |
| GL C&I Project Services Ltd | Construction | 2014 |
| Glaze Limited | Construction | 2006 |
| Glaze-Tech Services Limited | Construction | 2002 |
| Glebe House Day Nursery Limited | Education | 2004 |
| Global by Nature Limited | Wholesale & retail | 1993 |
| Global Health & Wealth Limited | Administrative & support | 2005 |
| Global Web PAY Limited | Administrative & support | 2010 |
| GM Pharmasolutions Ltd. | Professional & scientific | 2009 |
| Goodly Speak | Other services | 2015 |
| Goring Place Limited | Households | 2017 |
| Goulding Bros. & Co. Limited | Manufacturing | 2010 |
| GPH (UK) Limited | Construction | 2014 |
| GQ Wealth Management Limited | Other services | 2009 |
| Gqwm Assets Ltd | Professional & scientific | 2008 |
| Gqwm Holdings Ltd | Financial services | 2024 |
| Grafty Green Limited | Wholesale & retail | 2015 |
| Grantleigh Limited | Construction | 2004 |
| Granville Associates Ltd | Wholesale & retail | 2011 |
| Gravesend Roofing SP Ltd | Manufacturing | 2026 |
| Gravesend Roofing Specialist Ltd | Construction | 2025 |
| Green Willow Properties Limited | Real estate | 2025 |
| Greenacres Property Development Ltd | Construction | 2025 |
| Greenfield Press Ltd | Information & communication | 2022 |
| Greyfox Consultancy Limited | Administrative & support | 2001 |
| Greyline Auto's Ltd | Manufacturing | 2024 |
| Grove Facilities Management Limited | Administrative & support | 2013 |
| GTI Deliveries Ltd | Transport & logistics | 2016 |
| Guesmi & Co Limited | Wholesale & retail | 2022 |
| Guild Theory Records Ltd | Information & communication | 2023 |
| H.D.H. Security Systems Limited | Wholesale & retail | 1997 |
| H20 Plumbusters Ltd | Construction | 2016 |
| H2O Fire Protection Ltd | Public administration | 2008 |
| Hadrian and Langley Limited | Financial services | 2025 |
| Hadzhivachev Ltd | Transport & logistics | 2017 |
| Haffdad Driver Supplies Ltd | Transport & logistics | 2016 |
| Hallett's Plumbing & Drainage Ltd | Construction | 2024 |
| Halling Hounds Ltd | Other services | 2023 |
| Haltere Limited | Professional & scientific | 2014 |
| Hannahmade Ltd | Wholesale & retail | 2015 |
| Harbour Reach (Whitstable) Management Company Ltd | Households | 2024 |
| Harbour View Ramsgate Ltd | Financial services | 2020 |
| Harlequin Interiors Ltd | Construction | 2026 |
| Harrison Waldman Limited | Administrative & support | 2022 |
| Hawk Tuah Ltd | Wholesale & retail | 2024 |
| HBK Property Holdings Limited | Real estate | 2020 |
| HD Carpentry Solutions Limited | Manufacturing | 2023 |
| Headline Filters Limited | Manufacturing | 1986 |
| Heartly Homes Ltd | Real estate | 2020 |
| Helen Laycock Limited | Administrative & support | 2009 |
| Helen Pope PR Ltd | Professional & scientific | 2023 |
| HEM Trading LLP | | 2013 |
| Hengist Restaurant Aylesford Limited | Hospitality | 2024 |
| Heritage 1947 Ltd | Construction | 2015 |
| Heritage Flooring (UK) Ltd | Wholesale & retail | 2005 |
| Heritage Ramsgate Ltd | Real estate | 2020 |
| Hero Creative Ltd | Professional & scientific | 2004 |
| Hessed Limited | Information & communication | 2009 |
| Hibiscus Heights Ltd | Construction | 2026 |
| Hidden Treasures Travel & Tours Limited | Administrative & support | 2005 |
| High Profile Limited | Professional & scientific | 1993 |
| Higher Success Limited | Administrative & support | 2019 |
| Highlands Avionics Consultancy Ltd | Professional & scientific | 2019 |
| Hippocreme Limited | Administrative & support | 2026 |
| Hire Access Platforms Limited | Administrative & support | 2013 |
| HJ Smile Ltd | Health & social care | 2023 |
| Hlse Limited | Administrative & support | 2012 |
| Hoathley Limited | Administrative & support | 2007 |
| Holtwood Carpentry Ltd | Manufacturing | 2023 |
| Home County Ventures Limited | Financial services | 2018 |
| Homewood Wholesalers Ltd | Wholesale & retail | 2025 |
| Hovat Limited | Manufacturing | 1973 |
| Howard Caine Conservatories Limited | Construction | 2012 |
| Howard Water Solutions Ltd | Administrative & support | 2009 |
| HP Equestrian Limited | Professional & scientific | 2015 |
| HR Smith Electrical Ltd | Construction | 2002 |
| HRP Construction Services Ltd | Construction | 2019 |
| Hudson Rock Design Limited | Professional & scientific | 2014 |
| Hussey DH Holdings Limited | Financial services | 2026 |
| Hussey Investment Holdings Limited | Financial services | 2025 |
| Hydraulic Adaptors & Hose Assemblies Limited | Wholesale & retail | 1987 |
| Hyndman Ltd | Real estate | 2018 |
| I-Gp Virtual Doctor Ltd | Administrative & support | 2016 |
| IB Fresh Produce Consultancy Ltd | Professional & scientific | 2020 |
| Icsia Limited | Professional & scientific | 2025 |
| IGM Consultancy Services Limited | Professional & scientific | 2021 |
| IGS Interiors Limited | Construction | 2015 |
| IGS Projex Limited | Construction | 2023 |
| Ihorrana Cleaner Service Ltd | Administrative & support | 2023 |
| Ijjm Holdings Limited | Financial services | 2024 |
| Ikbe Golf Balls Ltd | Wholesale & retail | 2025 |
| Imain Limited | Health & social care | 2015 |
| Impact Leaders Advisors & Partners Ltd | Professional & scientific | 2019 |
| Imperium Industrial Services Ltd | Professional & scientific | 2024 |