| KRS Mechanical Services Limited | Construction | 1995 |
| Kruts Enterprise Ltd | Administrative & support | 2024 |
| Krystalz Ltd | Professional & scientific | 2020 |
| KS Investment Management Ltd | Professional & scientific | 2021 |
| KS Retail Group Ltd | Wholesale & retail | 2021 |
| Kssd Properties Ltd | Real estate | 2026 |
| KSW Property Solutions Ltd | Real estate | 2017 |
| KT Children's Social Care Consultancy Ltd | Professional & scientific | 2024 |
| KT Properties Group Limited | Real estate | 2023 |
| KT Services Ltd | Professional & scientific | 2025 |
| Kuiper Communications Limited | Information & communication | 2024 |
| Kukai Capital Limited | Financial services | 2025 |
| Kultrend Ltd | Wholesale & retail | 2025 |
| Kumari & Rise Group Ltd | Professional & scientific | 2025 |
| Kuna Group Ltd | Administrative & support | 2025 |
| Kunktela Limited | Wholesale & retail | 2026 |
| Kunvital Limited | Wholesale & retail | 2025 |
| Kurt Consulting Limited | Information & communication | 2025 |
| Kuru Shop Ltd | Wholesale & retail | 2024 |
| Kusins Ltd | Wholesale & retail | 2025 |
| Kutty Visuals Limited | Information & communication | 2024 |
| Kuzey Global Ltd | Wholesale & retail | 2025 |
| KWF Investments Limited | Real estate | 2023 |
| KX Mart Ltd | Wholesale & retail | 2026 |
| KXJ Ltd | Real estate | 2025 |
| KXM Enterprises Ltd | Education | 2025 |
| Kyoniko Limited | Information & communication | 2021 |
| Könige Ltd | Other services | 2026 |
| L & M Education Ltd | Information & communication | 2024 |
| L River Technology Ltd | Information & communication | 2024 |
| L Tucker Domestic and Commercial Cleaning Limited | Administrative & support | 2023 |
| L&R Entertainment Ltd | Arts & recreation | 2025 |
| L'Hivernage Ltd | Wholesale & retail | 2024 |
| L.A Cart Ltd | Hospitality | 2025 |
| L.A Scaffolding Access Ltd | Construction | 2024 |
| L.K. Financial Consulting Ltd | Administrative & support | 2026 |
| LA Diva Entertainments Ltd | Information & communication | 2005 |
| LA FEE Verte Limited | Wholesale & retail | 2026 |
| LA Galerie Design Limited | Manufacturing | 2015 |
| LA Green House Ltd | Financial services | 2024 |
| LA Huile Co. Ltd | Wholesale & retail | 2025 |
| LA Manada Team Ltd | Information & communication | 2025 |
| LA Milliardaire Spirits Limited | Manufacturing | 2020 |
| LA Soluzione Web Ltd | Information & communication | 2021 |
| LA VIE Group TR Ltd | Wholesale & retail | 2026 |
| Label and Store Ltd | Wholesale & retail | 2020 |
| Lacivert Yacht Limited | Professional & scientific | 2026 |
| Laconium Ltd | Financial services | 2022 |
| Lacrus Limited | Wholesale & retail | 2022 |
| Ladore Homes Ltd | Real estate | 2026 |
| Lady Forgeron Limited | Professional & scientific | 2026 |
| Lafiya Nigeria Ltd | Health & social care | 2021 |
| Lakbrook Ltd | Wholesale & retail | 2024 |
| Lakeland Interior Design Ltd | Other services | 2026 |
| Lakeland Rings Ltd | Manufacturing | 2023 |
| Lakewood Property Group Ltd | Real estate | 2020 |
| Lala People Ltd | Administrative & support | 2026 |
| Lalabubu Ltd | Wholesale & retail | 2025 |
| Laluma Ltd | Information & communication | 2016 |
| Lama Property Limited | Real estate | 2020 |
| Lambdawire Ltd | Information & communication | 2024 |
| Lambert Adam Group Ltd | Financial services | 2024 |
| Lamka Limited | Wholesale & retail | 2023 |
| Lamka Property Limited | Real estate | 2023 |
| Lana Legal Consulting Ltd | Professional & scientific | 2025 |
| Lanbolab Ltd | Information & communication | 2026 |
| Landa Consult Ltd | Construction | 2024 |
| Landley Capital L.P. | | 2018 |
| Landmark Settings Ltd | Real estate | 2020 |
| Landregan Holdings Limited | Financial services | 2026 |
| Lanei Group Ltd | Health & social care | 2026 |
| Langley Football Club Ltd | Arts & recreation | 2024 |
| Langvix Limited | Wholesale & retail | 2025 |
| Lanova Recruitment Ltd | Administrative & support | 2025 |
| Lanting Culture & Arts Ltd | Wholesale & retail | 2025 |
| Laoban Ltd | Wholesale & retail | 2023 |
| LAP25 Ltd | Arts & recreation | 2013 |
| Lapiks Investment Ltd | Wholesale & retail | 2020 |
| Lapis Property & Leisure Ltd | Real estate | 2023 |
| Lara IT Limited | Information & communication | 2025 |
| Laraib Pilates Limited | Health & social care | 2024 |
| Lasadof Ltd | Wholesale & retail | 2024 |
| Lasmir Ltd | Other services | 2021 |
| Last Love Pet Ltd | Wholesale & retail | 2025 |
| Last Night Rooms UK Ltd | Administrative & support | 2025 |
| Latam-Geoim Ltd | Information & communication | 2025 |
| Latent Loops Limited | Wholesale & retail | 2026 |
| Lateral Software Ltd | Information & communication | 2019 |
| Lathan Forrester Consultancy Ltd | Education | 2025 |
| Lathom Properties Limited | Real estate | 2026 |
| Latitude Learning Platform Ltd | Education | 2026 |
| Latitude Tracking Limited | Professional & scientific | 2025 |
| Launch Department Ltd | Professional & scientific | 2026 |
| Launchbase Ltd | Professional & scientific | 2025 |
| Laurel Architects Limited | Professional & scientific | 2025 |
| Lavenham Black Limited | Professional & scientific | 2018 |
| Lavin Global Ltd | Wholesale & retail | 2025 |
| Lavispa Health Ltd | Real estate | 2025 |
| Law Scale Solutions Ltd | Professional & scientific | 2025 |
| Lawful Survival Limited | Education | 2014 |