| Himmel Ltd | Information & communication | 2026 |
| Himvisible CIC | Health & social care | 2019 |
| HIS Ground Ltd | Real estate | 2025 |
| HJM Blake’S Properties Ltd | Real estate | 2022 |
| HL Barber 1 Ltd | Other services | 2026 |
| HL13 Limited | Manufacturing | 2018 |
| Holcroft Autos Ltd | Wholesale & retail | 2005 |
| Holland Digital Consultancy Ltd | Information & communication | 2026 |
| Holly Belle Properties Ltd | Real estate | 2025 |
| Housing With Care Ltd. | Health & social care | 1989 |
| Howlett Plumbing Supplies Ltd | Wholesale & retail | 2023 |
| I.S.A Driving Ltd | Transport & logistics | 2017 |
| IBA Risk Solutions Limited | Financial services | 2008 |
| Iconz Limited | Wholesale & retail | 2019 |
| Imagenetwork Limited | Other services | 2020 |
| Impact Sales Consultancy Limited | Professional & scientific | 2024 |
| IN NE Event Limited | Hospitality | 2024 |
| Industries Manning Solutions Ltd | Information & communication | 2016 |
| Innate Alchemy Therapies Limited | Education | 2025 |
| Inoconsult Ltd | Professional & scientific | 2023 |
| Inoengineering Services Ltd | Professional & scientific | 2023 |
| Inogroup Limited | Financial services | 2023 |
| Inorail Limited | Construction | 2015 |
| Inosurv Ltd | Other services | 2023 |
| Institute of Medical Ethics | Professional & scientific | 1970 |
| Intenfa UK Limited | Manufacturing | 2023 |
| Interchange 26 Management Company Limited | Real estate | 2025 |
| Iplant Contracting Limited | Construction | 2015 |
| It's ME Lisa G Ltd | Wholesale & retail | 2025 |
| ITECH400 Solutions Ltd | Information & communication | 2011 |
| J & V Affordable Limited | Administrative & support | 2021 |
| J B R Plant Hire Ltd | Construction | 2024 |
| J&M Fabrications (Liverpool) Ltd | Construction | 2014 |
| Jamie Alisdair Sinclair Limited | Extraterritorial | 2024 |
| JAW Slide Ltd | Professional & scientific | 2022 |
| JAY Medical Limited | Health & social care | 2021 |
| JDL Valeting Ltd | Transport & logistics | 2025 |
| JDM Project Services Limited | Administrative & support | 2026 |
| Jefford & Hart Limited | Real estate | 2015 |
| JJR Homes Limited | Households | 2026 |
| JK15 Limited | Real estate | 2023 |
| JL Roden Consultantancy Ltd | Construction | 2018 |
| Jlwl Limited | Administrative & support | 2021 |
| John Howlett Plumbing & Building Limited | Construction | 2007 |
| John REA Consultancy Limited | Professional & scientific | 2023 |
| Johnlaw Group Ltd | Real estate | 2021 |
| Joinery Plus Building Projects Ltd | Construction | 2015 |
| Joinery Plus Design & Build Ltd | Construction | 2017 |
| Jones Home Improvements Ltd | Construction | 2026 |
| Josh Hall Golf Limited | Arts & recreation | 2023 |
| JP 2391 Ltd | Construction | 2018 |
| JP Cloud Solutions Ltd | Information & communication | 2025 |
| JP Gaskell Ltd | Other services | 2022 |
| JPD Transport Ltd | Transport & logistics | 2013 |
| JPH Roofline Ltd | Construction | 2022 |
| JR Brickwork Construction Ltd | Construction | 2024 |
| JRS 2020 Ltd | Administrative & support | 2020 |
| Jump Safe International Ltd | Arts & recreation | 2020 |
| Jump-Pad Developments Limited | Construction | 2018 |
| Jump-Pad Limited | Real estate | 2015 |
| K H Properties 4 YOU Limited | Real estate | 2025 |
| K Harris & Partners Ltd | Professional & scientific | 2022 |
| K&D Xacc Limited | Administrative & support | 2025 |
| K.E. Victoria Ltd | Professional & scientific | 2020 |
| K.P. Properties Ltd | Hospitality | 2010 |
| K.R.J. Investments Limited | Professional & scientific | 2018 |
| K9 RAW Ltd | Wholesale & retail | 2026 |
| Kath O'Dwyer Consulting Ltd | Professional & scientific | 2026 |
| Kays Kebabs Limited | Hospitality | 2024 |
| Kebab & Spice Limited | Hospitality | 2024 |
| KEN Hickey Window Cleaning Services Limited | Administrative & support | 2011 |
| Keng Properties Ltd | Real estate | 2024 |
| Kerner Technology Limited | Information & communication | 2025 |
| Keys to Success Limited | Extraterritorial | 2012 |
| Kingdom Academy Limited | Education | 2009 |
| Kingdom Cleaning Limited | Administrative & support | 1987 |
| Kingdom Hygiene Limited | Administrative & support | 2019 |
| Kingdom L a Support Limited | Administrative & support | 2019 |
| Kingdom Medical Services Limited | Administrative & support | 2018 |
| Kingdom Mercury Limited | Administrative & support | 2003 |
| Kingdom People Limited | Administrative & support | 2016 |
| Kingdom Recruitment BR Limited | Administrative & support | 2019 |
| Kingdom Recruitment Limited | Administrative & support | 2001 |
| Kingdom Services Group Limited | Professional & scientific | 1993 |
| Kingdom Systems Limited | Administrative & support | 2018 |
| Kingdom Technology Services Limited | Administrative & support | 1995 |
| Kirkby House Ltd | Information & communication | 2025 |
| Kirkfield Hotel Limited | Hospitality | 2017 |
| Kirkham Retail Ltd | Wholesale & retail | 2023 |
| Kmpd Investments Ltd | Real estate | 2016 |
| Knightsbridge Rentals Ltd | Real estate | 2021 |
| Knohow Limited | Health & social care | 2018 |
| Knowles Newsagents Limited | Wholesale & retail | 2008 |
| KNP Stores Ltd | Wholesale & retail | 2025 |
| KT Scaffolding and Access Solutions Ltd | Construction | 2024 |
| L&W Butckey.Co Ltd | Hospitality | 2023 |
| L.G. Woodgate Ltd | Health & social care | 2007 |
| L3 CAD Soultions Ltd | Professional & scientific | 2011 |
| LA Mercer Housing Limited | Real estate | 2023 |
| Ladek Ltd | Transport & logistics | 2024 |