| Grumpy's Groundworks Ltd | Construction | 2015 |
| GXP Engaged Auditing Services UK Ltd. | Professional & scientific | 2022 |
| Hamlet Bidco Limited | Other services | 2024 |
| Hamlet Topco Limited | Other services | 2024 |
| Harbour Parade Holdings Limited | Financial services | 2026 |
| Harmoniz UK Ltd | Manufacturing | 2023 |
| Hartman Marine Services Limited | Manufacturing | 2002 |
| Hazelbank Limited | Wholesale & retail | 2016 |
| Healthy Systems Limited | Manufacturing | 1993 |
| Helia Consulting Limited | Professional & scientific | 2024 |
| Helix Public Relations Limited | Professional & scientific | 2025 |
| Henka Ltd | Professional & scientific | 2013 |
| Hercules Wine Warehouse Limited | Wholesale & retail | 2007 |
| Heward Trading Limited | Construction | 2007 |
| Hifp Limited | Professional & scientific | 2023 |
| High Voltage Services Limited | Professional & scientific | 2009 |
| Highway Marine Service Centre Limited | Manufacturing | 2007 |
| Hillstone Homes Property Developers Limited | Construction | 2021 |
| Hitchin Visioncare Limited | Wholesale & retail | 2016 |
| Hogwood House Ltd | Professional & scientific | 2019 |
| Holdenbridge Limited | Real estate | 1987 |
| Hollingworth and Partners Developments Limited | Construction | 2021 |
| Holly Point Ltd | Hospitality | 2014 |
| Horizon Properties Kent Limited | Real estate | 2024 |
| Horton Independent Financial Planning Limited | Financial services | 2009 |
| Hoskins Construction Ltd | Construction | 2003 |
| Hov-Pod (Bhco) Limited | Arts & recreation | 2020 |
| Hov-Pod Limited | Arts & recreation | 2020 |
| HRH Ventures Limited | Financial services | 2019 |
| Huddersfield TG Ltd | Arts & recreation | 2021 |
| Humanida Ltd | Professional & scientific | 2019 |
| Hume Planning Consultancy Limited | Professional & scientific | 2004 |
| Hydro Flow Energy Ltd | Professional & scientific | 2024 |
| Hydro Flow Energy Technologies Ltd | Professional & scientific | 2025 |
| Hydro Force Technologies Limited | Professional & scientific | 2024 |
| Hydro Technologies Limited | Professional & scientific | 2024 |
| Hydrophalt (UK) Limited | Construction | 2004 |
| Hyperion Decorators Limited | Construction | 2011 |
| Hypoint Ltd | Manufacturing | 2020 |
| Hzeal Ltd | Health & social care | 2023 |
| I'M Brickin' IT Limited | Construction | 2020 |
| IAN Denning Project Consultancy Limited | Professional & scientific | 2013 |
| Icestream Ltd | Real estate | 2018 |
| Iconic Productions LV Ltd | Professional & scientific | 2025 |
| Ideal 4 U Marketing Ltd | Professional & scientific | 2026 |
| ILB Design Services Limited | Professional & scientific | 2025 |
| Imagic Consultancy Limited | Information & communication | 2013 |
| Impact Care Group Ltd | Other services | 2026 |
| Incloudone Ltd | Information & communication | 2006 |
| Incryst Ltd | Professional & scientific | 2023 |
| Infinite Spirit Limited | Wholesale & retail | 1999 |
| Information Digital Limited | Information & communication | 2005 |
| Inhalytic Limited | Professional & scientific | 2018 |
| Inkengine Ltd | Information & communication | 2017 |
| Inserotech Limited | Agriculture & fishing | 2007 |
| Insight Safety Solutions Ltd | Professional & scientific | 2009 |
| Inspired Contact Centre Limited | Health & social care | 2022 |
| Inspired Fostering Limited | Health & social care | 2018 |
| Instro Precision Limited | Manufacturing | 1964 |
| Intelligent Software Solutions Global Limited | Information & communication | 2012 |
| Intrinsic Link IT Ltd | Administrative & support | 2018 |
| Investaco Limited | Financial services | 2008 |
| Iowna Ltd | Transport & logistics | 2022 |
| Ipsum Technologies Ltd | Manufacturing | 2020 |
| IVY & Scissors Ltd | Other services | 2026 |
| J&T Utilities Limited | Construction | 2016 |
| J5 Sports Ltd | Arts & recreation | 2014 |
| Jack & Ronan Investments Limited | Financial services | 2025 |
| Jack Frame Ltd | Arts & recreation | 2014 |
| JAG Automotive Ltd | Wholesale & retail | 2026 |
| JB Systems (UK) Limited | Arts & recreation | 1993 |
| JC & I Limited | Professional & scientific | 2023 |
| Jessie Rose Personal Development Ltd | Health & social care | 2021 |
| JG Maritime Solutions Limited | Other services | 2018 |
| JJP Systems Ltd | Information & communication | 2015 |
| Jobfixdirect Ltd | Professional & scientific | 1993 |
| John Shirley Limited | Transport & logistics | 1996 |
| John Wyeth & Brother Limited | Manufacturing | 1914 |
| Jordan Property Consultants Limited | Real estate | 2019 |
| JRC Lettings Limited | Real estate | 2020 |
| JRC Product Development Limited | Professional & scientific | 2018 |
| JSC Air Conditioning Limited | Energy | 2013 |
| Jshorton Ltd | Financial services | 2026 |
| Jump Arena Limited | Arts & recreation | 2015 |
| Just ASK Group Limited | Real estate | 2022 |
| Keates Wilders Catering Ltd | Hospitality | 2022 |
| Kejay Limited | Wholesale & retail | 2017 |
| Kenny Property Holdings Ltd | Real estate | 2022 |
| Kent & Medway Surgical Limited | Health & social care | 2018 |
| Kent Boiler Maintenance Ltd | Administrative & support | 2005 |
| Kent Coastal Properties Ltd | Real estate | 2024 |
| Kent Life Science LP | | 2018 |
| Kent Mini Stays Limited | Education | 2023 |
| Kent Nutrition and Wellness Limited | Health & social care | 2018 |
| Kent Renewable Energy Limited | Energy | 2010 |
| Kent Roller Disco Limited | Arts & recreation | 2014 |
| Kent Security Ltd | Administrative & support | 2023 |
| Keystone Principles Limited | Professional & scientific | 2014 |
| KF Consultancy Limited | Professional & scientific | 2023 |
| Kiln Commercial Properties Ltd | Construction | 2025 |