| Jim`S DRY Cleaners Limited | Other services | 2008 |
| Jinda Construction Ltd | Construction | 2019 |
| JJ Sealants Limited | Construction | 2010 |
| JJ Star Limited | Wholesale & retail | 2018 |
| JJO Investments Ltd | Real estate | 2025 |
| JK Barnehurst Accounting Ltd | Professional & scientific | 2014 |
| JK Habitat Ltd | Wholesale & retail | 2014 |
| JK SET Build Limited | Manufacturing | 2024 |
| Jkdunbar Ltd | Construction | 2023 |
| JKG Enterprise Ltd | Professional & scientific | 2017 |
| JKH Group Ltd | Construction | 2018 |
| JLC Limited | Wholesale & retail | 1996 |
| JLM Bookkeeping Ltd | Professional & scientific | 2023 |
| JM Kent Cleaning Services Ltd | Administrative & support | 2023 |
| JMB Design & Construction Ltd | Construction | 2006 |
| JMP Royale Property Solutions Ltd | Construction | 2025 |
| JMW Riders Ltd | Wholesale & retail | 2021 |
| JNL Fire and Security Ltd | Administrative & support | 2019 |
| Joanike Company Limited | Wholesale & retail | 2022 |
| Joanna Mcgowan Ltd | Education | 2019 |
| John E Swift Limited | Information & communication | 2017 |
| John Murray Properties Limited | Real estate | 2022 |
| Jokhan Enterprises Ltd | Information & communication | 2015 |
| Jopat International Limited | Construction | 2017 |
| Joy Enjoy Travel Ltd | Administrative & support | 2025 |
| Joy in Chaos Clothing Ltd | Manufacturing | 2021 |
| Joy’S Caribbean Fusion Limited | Manufacturing | 2019 |
| JP Luke Limited | Construction | 2014 |
| Jp&Ps Properties Ltd | Real estate | 2021 |
| JPH Building Solutions Ltd | Construction | 2025 |
| JPP Estates Group Ltd | Real estate | 2026 |
| JPP Ventures Ltd | Financial services | 2026 |
| JRB Property Investments Ltd | Real estate | 2020 |
| Jrja Limited | Real estate | 2023 |
| JS Install Ltd | Construction | 2020 |
| JSD Management Ltd | Real estate | 2016 |
| JSH Property Limited | Real estate | 2016 |
| JSJ Sealants Limited | Construction | 2022 |
| JSM Elite Services Limited | Transport & logistics | 2026 |
| JT Greenhouse Ltd | Hospitality | 2026 |
| JT Roofing & Guttering Ltd | Construction | 2022 |
| JTR SE Properties Limited | Real estate | 2021 |
| JTS Heating & Plumbing Services Ltd | Construction | 2017 |
| Jude Mechanical Services Ltd | Construction | 2010 |
| Julius Group Ltd | Real estate | 2019 |
| Just Shred Fitness Ltd | Public administration | 2024 |
| Jvpro SPV Ltd | Real estate | 2025 |
| JW Logistics Limited | Transport & logistics | 2018 |
| JW Logistics Transport Limited | Transport & logistics | 2019 |
| JWE Engineering Ltd | Professional & scientific | 2022 |
| JWS Scaffolding Limited | Construction | 2015 |
| K S Mini Mart Limited | Wholesale & retail | 2017 |
| K.C.C Property Management Ltd | Households | 2025 |
| K.E.T Builders Ltd | Construction | 2023 |
| Kafroshi Property Ltd | Real estate | 2020 |
| Kafroshi Traders Ltd | Wholesale & retail | 2020 |
| Kaiya Spa Ltd | Other services | 2025 |
| Kallagher Consultancy Ltd | Construction | 2009 |
| Kallal Estates Limited | Construction | 2005 |
| Kallal Properties Limited | Real estate | 2024 |
| Karemek Ltd | Real estate | 2018 |
| Karen a. Ioannou Limited | Financial services | 2005 |
| Katie's Playpen Limited | Wholesale & retail | 1995 |
| Kaur Retail Ltd | Wholesale & retail | 2024 |
| KB Security Limited | Information & communication | 2021 |
| KBT Academy Bexleyheath Ltd | Education | 2024 |
| KBT Academy Grading Ltd | Education | 2024 |
| KBT Franchise Ltd | Education | 2012 |
| KBT Leadership Academy LLP | | 2010 |
| KBT Merchandise Ltd | Education | 2024 |
| KC3 Healthcare Services Limited | Health & social care | 2020 |
| KCB 2026 Ltd | Hospitality | 2026 |
| KDB Home Solutions Ltd | Construction | 2020 |
| Keanusha Ltd | Wholesale & retail | 2021 |
| Keepingitsimple Limited | Professional & scientific | 2021 |
| Kelleher Group Environmental Limited | Other services | 2026 |
| Kelleher Group Maintenance Limited | Construction | 2024 |
| Kelleher Hire Limited | Administrative & support | 2025 |
| Kemron Limited | Real estate | 2005 |
| Kenan Digital Ltd | Professional & scientific | 2017 |
| Kent & April Court Limited | Real estate | 2025 |
| Kent & Beckenham Limited | Real estate | 2022 |
| Kent & Bromley Limited | Real estate | 2018 |
| Kent & Dartford Estates Limited | Real estate | 2015 |
| Kent & Maidstone Limited | Real estate | 2018 |
| Kent & Middlesex Limited | Real estate | 2018 |
| Kent & Monckton Limited | Real estate | 2022 |
| Kent & Peckham Limited | Real estate | 2020 |
| Kent & Somerfield Developments Limited | Construction | 2021 |
| Kent & Somerfield Limited | Real estate | 2021 |
| Kent & Surrey Limited | Real estate | 2018 |
| Kent Balloon Studio Ltd | Hospitality | 2026 |
| Kent Car World Ltd | Wholesale & retail | 2024 |
| Kent Compactors Ltd | Wholesale & retail | 2024 |
| Kent Consulting Group Ltd | Education | 2025 |
| Kent Rendering and Repointing Limited | Construction | 2019 |
| Kent Roofing Limited | Construction | 2019 |
| Kerthan Holdings Ltd | Professional & scientific | 2026 |
| Key Performance International Healthcare Ltd | Health & social care | 2021 |
| Key Performance International Maxillofacial Ltd | Administrative & support | 2021 |