| Imara Engineering Ltd | Professional & scientific | 2026 |
| Imoh's Venture Ltd | Construction | 2026 |
| Imranyounis Ltd | Wholesale & retail | 2024 |
| IN Depth GAS Solutions Ltd | Mining & quarrying | 2016 |
| Inchay Productions Limited | Information & communication | 2009 |
| Independent Mortgage Centre Limited | Financial services | 2006 |
| Indwelling Group Co., Ltd | Extraterritorial | 2018 |
| Insightech Ltd | Information & communication | 2018 |
| Interrupt the Routine Ltd | Arts & recreation | 2014 |
| Intii Transport Ltd | Transport & logistics | 2025 |
| Irie Bwoi Foodservices Limited | Hospitality | 2021 |
| Israel Haifa Chemicals Group Co., Ltd | Manufacturing | 2025 |
| Italian Citizenship Consultancy Lucarelli Ltd | Other services | 2024 |
| Ivanov Haulage Ltd | Transport & logistics | 2026 |
| J M Developers UK Limited | Real estate | 2021 |
| J7 Collective Ltd | Manufacturing | 2026 |
| Jackie Potatoes Ltd | Hospitality | 2023 |
| Jaskarn Ltd | Transport & logistics | 2025 |
| Jeeny Tech Ltd | Information & communication | 2025 |
| Jianging Limited | Transport & logistics | 2024 |
| Jicin Ltd | Administrative & support | 2022 |
| JMR Care Consultancy Ltd | Professional & scientific | 2026 |
| Joy of Toys Limited | Wholesale & retail | 2022 |
| K&M Creative London LLP | | 2014 |
| Kaapu AI Limited | Health & social care | 2026 |
| Kaiser Aluminum Ltd | Extraterritorial | 2018 |
| Karim Single Origin Limited | Wholesale & retail | 2026 |
| KAS Ventures Ltd | Health & social care | 2019 |
| Kemly Ltd | Wholesale & retail | 2025 |
| Khamaj Ltd | Administrative & support | 2014 |
| Khdmat Trading Group Co., Limited | Wholesale & retail | 2023 |
| Kindle Trading Co., Ltd | Wholesale & retail | 2024 |
| Kismet Ozturk Ltd | Manufacturing | 2026 |
| Kivo Store Ltd | Wholesale & retail | 2026 |
| Kofolina Hair Limited | Other services | 2023 |
| Kona Smart Products Co., Ltd | Extraterritorial | 2019 |
| L1 Consultancy Ltd | Information & communication | 2026 |
| Laanghaalee Homes Ltd | Real estate | 2024 |
| Laintek Ltd | Information & communication | 2025 |
| Laoxia Trading Co., Ltd | Administrative & support | 2023 |
| Lashious Beauty Global Ltd | Other services | 2025 |
| Lashious Beauty Investments Ltd | Other services | 2025 |
| Lashious Beauty Trading Ltd | Other services | 2026 |
| Layrah 61 Ltd | Hospitality | 2026 |
| Lens & Specs Ltd | Health & social care | 2023 |
| Lightning Response Ltd | Information & communication | 2026 |
| Lion Business Solutions Ltd | Professional & scientific | 2025 |
| Little Lights Daycare Ltd | Health & social care | 2018 |
| Loka (UK) International Limited | Extraterritorial | 2019 |
| Lomesa Hair Ltd | Other services | 2026 |
| London Construction & Home Improvement Ltd | Construction | 2018 |
| London Longevity Clinic Limited | Health & social care | 2024 |
| LOZ Flowers Limited | Wholesale & retail | 2024 |
| LRG Homes Ltd | Real estate | 2026 |
| LSC Retail Ltd | Wholesale & retail | 2023 |
| Luxe Styling and Deco Hire Limited | Administrative & support | 2026 |
| Lydia Import and Export Co., Ltd | Wholesale & retail | 2021 |
| MA Michand Ltd | Other services | 2023 |
| Machriana Limited | Information & communication | 2020 |
| Maison Moments Events Ltd | Wholesale & retail | 2025 |
| Manchester Scrap Metals Ltd | Wholesale & retail | 2026 |
| Mariasilvabrito Ltd | Hospitality | 2026 |
| Marlowe Films Limited | Information & communication | 2008 |
| Marmaris Regis Restaurant Ltd | Hospitality | 2026 |
| Marshall Eco Ltd | Construction | 2025 |
| Matthews Education Services Ltd | Education | 2024 |
| Maww Ltd | Professional & scientific | 2026 |
| MD Moine AZZ Ltd | Wholesale & retail | 2025 |
| Mhair London Ltd | Other services | 2020 |
| Milenium Int'L Limited | Extraterritorial | 2014 |
| Mina Best Services Limited | Construction | 2025 |
| Mind Links MCR Ltd | Wholesale & retail | 2021 |
| Mine More Medical and Aesthetic Technology International Group (UK) Co., Ltd. | Extraterritorial | 2019 |
| Minhoco 94 Ltd | Financial services | 2025 |
| Miran Housing Ltd | Real estate | 2022 |
| Moon Mahmud Travels Limited | Administrative & support | 2026 |
| Muhammadjunaiddelivery Ltd | Transport & logistics | 2026 |
| Mumsareus Ltd | Health & social care | 2026 |
| Nardmag Ltd | Wholesale & retail | 2026 |
| Nationwide Business Services Ltd | Administrative & support | 2009 |
| Natural Beauty From Within Ltd | Administrative & support | 2011 |
| NEO Business Consulting Ltd | Professional & scientific | 2016 |
| Newington Estates and Management Limited | Real estate | 2024 |
| Newsun Technology Co., Ltd | Extraterritorial | 2015 |
| Nicholas Owen Associates Ltd | Professional & scientific | 2011 |
| Ningbo Anda Auto Parts Co., Ltd. | Extraterritorial | 2014 |
| Ningbo Blue Machines Co., Ltd. | Wholesale & retail | 2019 |
| Ningbo Daco Industrial Co., Ltd | Extraterritorial | 2017 |
| NJC Medical Services Limited | Health & social care | 2023 |
| Nooriyah Health Care Agency Ltd | Health & social care | 2025 |
| NRK Consultancy Ltd | Health & social care | 2026 |
| NS Accommodation Ltd | Hospitality | 2021 |
| NT10W Ltd | Other services | 2025 |
| NT20W Ltd | Other services | 2025 |
| NT30W Ltd | Other services | 2025 |
| NT40W Ltd | Other services | 2026 |
| NTV01 Limited | Other services | 2026 |
| NW Properties Solutions Ltd | Real estate | 2024 |
| Old Soul Studio Ltd | Wholesale & retail | 2025 |
| OMG Nordic L.P. | | 2016 |